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-rw-r--r--pkgs/applications/accessibility/contrast/default.nix2
-rw-r--r--pkgs/applications/audio/cadence/default.nix3
-rw-r--r--pkgs/applications/audio/clementine/default.nix2
-rw-r--r--pkgs/applications/audio/cozy-audiobooks/default.nix2
-rw-r--r--pkgs/applications/audio/curseradio/default.nix2
-rw-r--r--pkgs/applications/audio/dfasma/default.nix2
-rw-r--r--pkgs/applications/audio/dr14_tmeter/default.nix2
-rw-r--r--pkgs/applications/audio/faust/faust2jackrust.nix3
-rw-r--r--pkgs/applications/audio/fmit/default.nix2
-rw-r--r--pkgs/applications/audio/gnome-podcasts/default.nix2
-rw-r--r--pkgs/applications/audio/gpodder/default.nix2
-rw-r--r--pkgs/applications/audio/greg/default.nix2
-rw-r--r--pkgs/applications/audio/gtklick/default.nix2
-rw-r--r--pkgs/applications/audio/jamulus/default.nix2
-rw-r--r--pkgs/applications/audio/librespot/default.nix2
-rw-r--r--pkgs/applications/audio/lmms/default.nix2
-rw-r--r--pkgs/applications/audio/mimms/default.nix2
-rw-r--r--pkgs/applications/audio/mixxx/default.nix2
-rw-r--r--pkgs/applications/audio/mopidy/gmusic.nix2
-rw-r--r--pkgs/applications/audio/mopidy/iris.nix2
-rw-r--r--pkgs/applications/audio/mopidy/moped.nix2
-rw-r--r--pkgs/applications/audio/mopidy/mopify.nix2
-rw-r--r--pkgs/applications/audio/mopidy/mpd.nix2
-rw-r--r--pkgs/applications/audio/mopidy/mpris.nix2
-rw-r--r--pkgs/applications/audio/mopidy/scrobbler.nix2
-rw-r--r--pkgs/applications/audio/mopidy/somafm.nix2
-rw-r--r--pkgs/applications/audio/mopidy/soundcloud.nix2
-rw-r--r--pkgs/applications/audio/mopidy/spotify-tunigo.nix2
-rw-r--r--pkgs/applications/audio/mopidy/spotify.nix2
-rw-r--r--pkgs/applications/audio/mopidy/tunein.nix2
-rw-r--r--pkgs/applications/audio/mopidy/youtube.nix2
-rw-r--r--pkgs/applications/audio/munt/default.nix2
-rw-r--r--pkgs/applications/audio/musescore/default.nix2
-rw-r--r--pkgs/applications/audio/noisetorch/default.nix2
-rw-r--r--pkgs/applications/audio/padthv1/default.nix2
-rw-r--r--pkgs/applications/audio/picard/default.nix2
-rw-r--r--pkgs/applications/audio/pithos/default.nix2
-rw-r--r--pkgs/applications/audio/polyphone/default.nix2
-rw-r--r--pkgs/applications/audio/puddletag/default.nix2
-rw-r--r--pkgs/applications/audio/pulseaudio-dlna/default.nix2
-rw-r--r--pkgs/applications/audio/pulseaudio-dlna/zeroconf.nix2
-rw-r--r--pkgs/applications/audio/qjackctl/default.nix2
-rw-r--r--pkgs/applications/audio/qmmp/default.nix2
-rw-r--r--pkgs/applications/audio/qsampler/default.nix2
-rw-r--r--pkgs/applications/audio/qsynth/default.nix2
-rw-r--r--pkgs/applications/audio/qtractor/default.nix2
-rw-r--r--pkgs/applications/audio/shortwave/default.nix2
-rw-r--r--pkgs/applications/audio/sonata/default.nix2
-rw-r--r--pkgs/applications/audio/spotify-cli-linux/default.nix2
-rw-r--r--pkgs/applications/audio/synthv1/default.nix2
-rw-r--r--pkgs/applications/audio/traverso/default.nix2
-rw-r--r--pkgs/applications/audio/whipper/default.nix2
-rw-r--r--pkgs/applications/blockchains/ethabi.nix2
-rw-r--r--pkgs/applications/blockchains/ledger-live-desktop/default.nix2
-rw-r--r--pkgs/applications/blockchains/quorum.nix2
-rw-r--r--pkgs/applications/blockchains/turbo-geth.nix2
-rw-r--r--pkgs/applications/editors/emacs-modes/sv-kalender/default.nix2
-rw-r--r--pkgs/applications/editors/featherpad/default.nix2
-rw-r--r--pkgs/applications/editors/focuswriter/default.nix2
-rw-r--r--pkgs/applications/editors/hecate/default.nix2
-rw-r--r--pkgs/applications/editors/hexdino/default.nix2
-rw-r--r--pkgs/applications/editors/kibi/default.nix2
-rw-r--r--pkgs/applications/editors/manuskript/default.nix2
-rw-r--r--pkgs/applications/editors/mindforger/default.nix2
-rw-r--r--pkgs/applications/editors/neovim/gnvim/default.nix2
-rw-r--r--pkgs/applications/editors/neovim/neovim-remote.nix2
-rw-r--r--pkgs/applications/editors/okteta/default.nix2
-rw-r--r--pkgs/applications/editors/retext/default.nix2
-rw-r--r--pkgs/applications/editors/sigil/default.nix2
-rw-r--r--pkgs/applications/editors/texmacs/common.nix2
-rw-r--r--pkgs/applications/editors/thonny/default.nix2
-rw-r--r--pkgs/applications/editors/tiled/default.nix2
-rw-r--r--pkgs/applications/graphics/displaycal/default.nix2
-rw-r--r--pkgs/applications/graphics/dosage/default.nix2
-rw-r--r--pkgs/applications/graphics/freecad/default.nix2
-rw-r--r--pkgs/applications/graphics/gimp/wrapper.nix2
-rw-r--r--pkgs/applications/graphics/gscan2pdf/default.nix2
-rw-r--r--pkgs/applications/graphics/hydrus/default.nix2
-rw-r--r--pkgs/applications/graphics/ipe/default.nix2
-rw-r--r--pkgs/applications/graphics/kgraphviewer/default.nix2
-rw-r--r--pkgs/applications/graphics/krop/default.nix2
-rw-r--r--pkgs/applications/graphics/luminance-hdr/default.nix2
-rw-r--r--pkgs/applications/graphics/mcomix3/default.nix3
-rw-r--r--pkgs/applications/graphics/meme/default.nix2
-rw-r--r--pkgs/applications/graphics/mypaint/default.nix2
-rw-r--r--pkgs/applications/graphics/nomacs/default.nix2
-rw-r--r--pkgs/applications/graphics/paraview/default.nix2
-rw-r--r--pkgs/applications/graphics/pdfcpu/default.nix2
-rw-r--r--pkgs/applications/graphics/photoflare/default.nix2
-rw-r--r--pkgs/applications/graphics/photoqt/default.nix2
-rw-r--r--pkgs/applications/graphics/phototonic/default.nix2
-rw-r--r--pkgs/applications/graphics/pick-colour-picker/default.nix2
-rw-r--r--pkgs/applications/graphics/pinta/default.nix2
-rw-r--r--pkgs/applications/graphics/qcomicbook/default.nix2
-rw-r--r--pkgs/applications/graphics/rapid-photo-downloader/default.nix2
-rw-r--r--pkgs/applications/graphics/renderdoc/default.nix2
-rw-r--r--pkgs/applications/graphics/scantailor/advanced.nix2
-rw-r--r--pkgs/applications/graphics/tesseract/wrapper.nix2
-rw-r--r--pkgs/applications/logging/humioctl/default.nix2
-rw-r--r--pkgs/applications/misc/antfs-cli/default.nix2
-rw-r--r--pkgs/applications/misc/ape/apeclex.nix2
-rw-r--r--pkgs/applications/misc/archivy/default.nix2
-rw-r--r--pkgs/applications/misc/ausweisapp2/default.nix2
-rw-r--r--pkgs/applications/misc/autospotting/default.nix2
-rw-r--r--pkgs/applications/misc/barrier/default.nix2
-rw-r--r--pkgs/applications/misc/bibletime/default.nix2
-rw-r--r--pkgs/applications/misc/bleachbit/default.nix2
-rw-r--r--pkgs/applications/misc/break-time/default.nix2
-rw-r--r--pkgs/applications/misc/buku/default.nix2
-rw-r--r--pkgs/applications/misc/candle/default.nix2
-rw-r--r--pkgs/applications/misc/cheat/default.nix2
-rw-r--r--pkgs/applications/misc/chewing-editor/default.nix2
-rw-r--r--pkgs/applications/misc/coursera-dl/default.nix2
-rw-r--r--pkgs/applications/misc/crow-translate/default.nix2
-rw-r--r--pkgs/applications/misc/cum/default.nix2
-rw-r--r--pkgs/applications/misc/cura/lulzbot/libarcus.nix2
-rw-r--r--pkgs/applications/misc/cura/lulzbot/libsavitar.nix2
-rw-r--r--pkgs/applications/misc/cura/lulzbot/uranium.nix2
-rw-r--r--pkgs/applications/misc/dasel/default.nix2
-rw-r--r--pkgs/applications/misc/devdocs-desktop/default.nix2
-rw-r--r--pkgs/applications/misc/dfilemanager/default.nix2
-rw-r--r--pkgs/applications/misc/diffpdf/default.nix2
-rw-r--r--pkgs/applications/misc/dmensamenu/default.nix2
-rw-r--r--pkgs/applications/misc/dockbarx/default.nix2
-rw-r--r--pkgs/applications/misc/dotfiles/default.nix2
-rw-r--r--pkgs/applications/misc/dstask/default.nix2
-rw-r--r--pkgs/applications/misc/dupeguru/default.nix2
-rw-r--r--pkgs/applications/misc/electrum/dash.nix2
-rw-r--r--pkgs/applications/misc/electrum/ltc.nix2
-rw-r--r--pkgs/applications/misc/elfx86exts/default.nix2
-rw-r--r--pkgs/applications/misc/exercism/default.nix2
-rw-r--r--pkgs/applications/misc/expenses/default.nix2
-rw-r--r--pkgs/applications/misc/fbmenugen/default.nix2
-rw-r--r--pkgs/applications/misc/geoipupdate/default.nix2
-rw-r--r--pkgs/applications/misc/get_iplayer/default.nix2
-rw-r--r--pkgs/applications/misc/go-jira/default.nix2
-rw-r--r--pkgs/applications/misc/golden-cheetah/default.nix2
-rw-r--r--pkgs/applications/misc/gpsbabel/gui.nix2
-rw-r--r--pkgs/applications/misc/gramps/default.nix2
-rw-r--r--pkgs/applications/misc/gsctl/default.nix2
-rw-r--r--pkgs/applications/misc/hamster/default.nix2
-rw-r--r--pkgs/applications/misc/haxor-news/default.nix2
-rw-r--r--pkgs/applications/misc/hivemind/default.nix2
-rw-r--r--pkgs/applications/misc/hugo/default.nix2
-rw-r--r--pkgs/applications/misc/jrnl/default.nix2
-rw-r--r--pkgs/applications/misc/k4dirstat/default.nix2
-rw-r--r--pkgs/applications/misc/keepass/default.nix2
-rw-r--r--pkgs/applications/misc/khard/default.nix2
-rw-r--r--pkgs/applications/misc/kondo/default.nix2
-rw-r--r--pkgs/applications/misc/kupfer/default.nix2
-rw-r--r--pkgs/applications/misc/loxodo/default.nix2
-rw-r--r--pkgs/applications/misc/madonctl/default.nix2
-rw-r--r--pkgs/applications/misc/mediaelch/default.nix2
-rw-r--r--pkgs/applications/misc/menumaker/default.nix2
-rw-r--r--pkgs/applications/misc/mop/default.nix2
-rw-r--r--pkgs/applications/misc/mqtt-bench/default.nix2
-rw-r--r--pkgs/applications/misc/multibootusb/default.nix2
-rw-r--r--pkgs/applications/misc/nixnote2/default.nix2
-rw-r--r--pkgs/applications/misc/ocropus/default.nix2
-rw-r--r--pkgs/applications/misc/onboard/default.nix2
-rw-r--r--pkgs/applications/misc/opentx/default.nix2
-rw-r--r--pkgs/applications/misc/orca/default.nix2
-rw-r--r--pkgs/applications/misc/pass-secret-service/default.nix2
-rw-r--r--pkgs/applications/misc/pdf-quench/default.nix2
-rw-r--r--pkgs/applications/misc/pdfarranger/default.nix2
-rw-r--r--pkgs/applications/misc/pdfdiff/default.nix2
-rw-r--r--pkgs/applications/misc/pgmodeler/default.nix3
-rw-r--r--pkgs/applications/misc/pipr/default.nix3
-rw-r--r--pkgs/applications/misc/plover/default.nix2
-rw-r--r--pkgs/applications/misc/prevo/default.nix2
-rw-r--r--pkgs/applications/misc/printrun/default.nix2
-rw-r--r--pkgs/applications/misc/pydf/default.nix2
-rw-r--r--pkgs/applications/misc/pyditz/cerberus.nix2
-rw-r--r--pkgs/applications/misc/pyditz/default.nix2
-rw-r--r--pkgs/applications/misc/pytrainer/default.nix2
-rw-r--r--pkgs/applications/misc/qdirstat/default.nix2
-rw-r--r--pkgs/applications/misc/qlcplus/default.nix2
-rw-r--r--pkgs/applications/misc/qpdfview/default.nix2
-rw-r--r--pkgs/applications/misc/qsudo/default.nix2
-rw-r--r--pkgs/applications/misc/qt-box-editor/default.nix2
-rw-r--r--pkgs/applications/misc/qtbitcointrader/default.nix2
-rw-r--r--pkgs/applications/misc/ranger/default.nix2
-rw-r--r--pkgs/applications/misc/remarkable/remarkable-mouse/default.nix2
-rw-r--r--pkgs/applications/misc/remarkable/rmapi/default.nix2
-rw-r--r--pkgs/applications/misc/remarkable/rmview/default.nix2
-rw-r--r--pkgs/applications/misc/rsclock/default.nix2
-rw-r--r--pkgs/applications/misc/rss-bridge-cli/default.nix2
-rw-r--r--pkgs/applications/misc/rtv/default.nix2
-rw-r--r--pkgs/applications/misc/snapper-gui/default.nix2
-rw-r--r--pkgs/applications/misc/syncthing-tray/default.nix2
-rw-r--r--pkgs/applications/misc/taskwarrior-tui/default.nix2
-rw-r--r--pkgs/applications/misc/termdown/default.nix2
-rw-r--r--pkgs/applications/misc/terminal-parrot/default.nix2
-rw-r--r--pkgs/applications/misc/termpdf.py/default.nix2
-rw-r--r--pkgs/applications/misc/tickrs/default.nix2
-rw-r--r--pkgs/applications/misc/tipp10/default.nix2
-rw-r--r--pkgs/applications/misc/todiff/default.nix2
-rw-r--r--pkgs/applications/misc/toot/default.nix2
-rw-r--r--pkgs/applications/misc/topydo/default.nix2
-rw-r--r--pkgs/applications/misc/tty-share/default.nix2
-rw-r--r--pkgs/applications/misc/tut/default.nix2
-rw-r--r--pkgs/applications/misc/tzupdate/default.nix2
-rw-r--r--pkgs/applications/misc/udiskie/default.nix2
-rw-r--r--pkgs/applications/misc/ulauncher/default.nix2
-rw-r--r--pkgs/applications/misc/urlscan/default.nix2
-rw-r--r--pkgs/applications/misc/valentina/default.nix2
-rw-r--r--pkgs/applications/misc/vym/default.nix2
-rw-r--r--pkgs/applications/misc/wego/default.nix2
-rw-r--r--pkgs/applications/misc/wikicurses/default.nix2
-rw-r--r--pkgs/applications/misc/xdgmenumaker/default.nix2
-rw-r--r--pkgs/applications/misc/yokadi/default.nix2
-rw-r--r--pkgs/applications/misc/zk-shell/default.nix2
-rw-r--r--pkgs/applications/misc/zscroll/default.nix2
-rw-r--r--pkgs/applications/networking/brig/default.nix2
-rw-r--r--pkgs/applications/networking/browsers/browsh/default.nix2
-rw-r--r--pkgs/applications/networking/browsers/castor/default.nix2
-rw-r--r--pkgs/applications/networking/browsers/chromium/browser.nix2
-rw-r--r--pkgs/applications/networking/browsers/eolie/default.nix2
-rw-r--r--pkgs/applications/networking/browsers/qutebrowser/default.nix2
-rw-r--r--pkgs/applications/networking/c14/default.nix2
-rw-r--r--pkgs/applications/networking/cloudflared/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/atlantis/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/docker-machine/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/docker-machine/kvm.nix2
-rw-r--r--pkgs/applications/networking/cluster/fluxcd/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/fluxctl/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/habitat/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/helm/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/k9s/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/kops/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/kubeless/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/kubelogin/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/kubernix/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/kubeval/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/linkerd/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/openshift/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/popeye/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/ssm-agent/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/terraform-inventory/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/terraform-providers/ansible/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/terraform-providers/cloudfoundry/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/terraform-providers/elasticsearch/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/terraform-providers/gandi/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/terraform-providers/hcloud/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/terraform-providers/keycloak/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/terraform-providers/libvirt/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/terraform-providers/linuxbox/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/terraform-providers/lxd/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/terraform-providers/shell/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/terraform-providers/vercel/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/terraform-providers/vpsadmin/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/tilt/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/velero/default.nix2
-rw-r--r--pkgs/applications/networking/datovka/default.nix2
-rw-r--r--pkgs/applications/networking/dyndns/cfdyndns/default.nix2
-rw-r--r--pkgs/applications/networking/feedreaders/canto-curses/default.nix2
-rw-r--r--pkgs/applications/networking/feedreaders/canto-daemon/default.nix2
-rw-r--r--pkgs/applications/networking/feedreaders/feeds/default.nix2
-rw-r--r--pkgs/applications/networking/feedreaders/rawdog/default.nix2
-rw-r--r--pkgs/applications/networking/flent/default.nix2
-rw-r--r--pkgs/applications/networking/gdrive/default.nix2
-rw-r--r--pkgs/applications/networking/gns3/server.nix2
-rw-r--r--pkgs/applications/networking/instant-messengers/blink/default.nix2
-rw-r--r--pkgs/applications/networking/instant-messengers/cordless/default.nix2
-rw-r--r--pkgs/applications/networking/instant-messengers/coyim/default.nix2
-rw-r--r--pkgs/applications/networking/instant-messengers/element/element-desktop.nix2
-rw-r--r--pkgs/applications/networking/instant-messengers/ferdi/default.nix2
-rw-r--r--pkgs/applications/networking/instant-messengers/franz/default.nix2
-rw-r--r--pkgs/applications/networking/instant-messengers/linphone/default.nix2
-rw-r--r--pkgs/applications/networking/instant-messengers/matrixcli/default.nix2
-rw-r--r--pkgs/applications/networking/instant-messengers/mm/default.nix2
-rw-r--r--pkgs/applications/networking/instant-messengers/neochat/default.nix2
-rw-r--r--pkgs/applications/networking/instant-messengers/pybitmessage/default.nix2
-rw-r--r--pkgs/applications/networking/instant-messengers/rambox/rambox.nix2
-rw-r--r--pkgs/applications/networking/instant-messengers/ricochet/default.nix2
-rw-r--r--pkgs/applications/networking/instant-messengers/scudcloud/default.nix2
-rw-r--r--pkgs/applications/networking/instant-messengers/slack-term/default.nix2
-rw-r--r--pkgs/applications/networking/instant-messengers/swift-im/default.nix2
-rw-r--r--pkgs/applications/networking/instant-messengers/tensor/default.nix2
-rw-r--r--pkgs/applications/networking/instant-messengers/turses/default.nix2
-rw-r--r--pkgs/applications/networking/instant-messengers/twinkle/default.nix2
-rw-r--r--pkgs/applications/networking/instant-messengers/xmpp-client/default.nix2
-rw-r--r--pkgs/applications/networking/ipfs-cluster/default.nix2
-rw-r--r--pkgs/applications/networking/ipfs/default.nix2
-rw-r--r--pkgs/applications/networking/ipget/default.nix2
-rw-r--r--pkgs/applications/networking/irc/qweechat/default.nix2
-rw-r--r--pkgs/applications/networking/irc/weechat/scripts/weechat-matrix/default.nix2
-rw-r--r--pkgs/applications/networking/lieer/default.nix2
-rw-r--r--pkgs/applications/networking/maestral-qt/default.nix3
-rw-r--r--pkgs/applications/networking/mailreaders/aerc/default.nix2
-rw-r--r--pkgs/applications/networking/mailreaders/afew/default.nix2
-rw-r--r--pkgs/applications/networking/mailreaders/mailpile/default.nix2
-rw-r--r--pkgs/applications/networking/mailreaders/meli/default.nix3
-rw-r--r--pkgs/applications/networking/mailreaders/mlarchive2maildir/default.nix2
-rw-r--r--pkgs/applications/networking/owncloud-client/default.nix2
-rw-r--r--pkgs/applications/networking/p2p/deluge/default.nix2
-rw-r--r--pkgs/applications/networking/p2p/zeronet/default.nix2
-rw-r--r--pkgs/applications/networking/protocol/default.nix2
-rw-r--r--pkgs/applications/networking/pyload/default.nix2
-rw-r--r--pkgs/applications/networking/qv2ray/default.nix2
-rw-r--r--pkgs/applications/networking/remote/x2goclient/default.nix2
-rw-r--r--pkgs/applications/networking/shellhub-agent/default.nix2
-rw-r--r--pkgs/applications/networking/soulseek/nicotine-plus/default.nix2
-rw-r--r--pkgs/applications/networking/sync/acd_cli/default.nix2
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2779 files changed, 2844 insertions, 2834 deletions
diff --git a/pkgs/applications/accessibility/contrast/default.nix b/pkgs/applications/accessibility/contrast/default.nix
index 2899d4ea6efa..689ad2735752 100644
--- a/pkgs/applications/accessibility/contrast/default.nix
+++ b/pkgs/applications/accessibility/contrast/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitLab
 , cairo
 , dbus
diff --git a/pkgs/applications/audio/cadence/default.nix b/pkgs/applications/audio/cadence/default.nix
index d71420d07227..2d3ac0c314ea 100644
--- a/pkgs/applications/audio/cadence/default.nix
+++ b/pkgs/applications/audio/cadence/default.nix
@@ -1,7 +1,6 @@
-{ stdenv
+{ lib
 , a2jmidid
 , coreutils
-, lib
 , libjack2
 , fetchpatch
 , fetchzip
diff --git a/pkgs/applications/audio/clementine/default.nix b/pkgs/applications/audio/clementine/default.nix
index 12aec0d4cbbc..be0f2f72529c 100644
--- a/pkgs/applications/audio/clementine/default.nix
+++ b/pkgs/applications/audio/clementine/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, fetchpatch, boost, cmake, chromaprint, gettext, gst_all_1, liblastfm
+{ lib, mkDerivation, fetchFromGitHub, fetchpatch, boost, cmake, chromaprint, gettext, gst_all_1, liblastfm
 , qtbase, qtx11extras
 , taglib, fftw, glew, qjson, sqlite, libgpod, libplist, usbmuxd, libmtp
 , libpulseaudio, gvfs, libcdio, libechonest, libspotify, pcre, projectm, protobuf
diff --git a/pkgs/applications/audio/cozy-audiobooks/default.nix b/pkgs/applications/audio/cozy-audiobooks/default.nix
index e78e50877d37..bcad36e2da98 100644
--- a/pkgs/applications/audio/cozy-audiobooks/default.nix
+++ b/pkgs/applications/audio/cozy-audiobooks/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub
+{ lib, fetchFromGitHub
 , ninja
 , meson
 , pkg-config
diff --git a/pkgs/applications/audio/curseradio/default.nix b/pkgs/applications/audio/curseradio/default.nix
index 82f3b130e6ea..94059e06e546 100644
--- a/pkgs/applications/audio/curseradio/default.nix
+++ b/pkgs/applications/audio/curseradio/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, substituteAll, python3Packages, mpv }:
+{ lib, fetchFromGitHub, substituteAll, python3Packages, mpv }:
 
 python3Packages.buildPythonApplication rec {
   version = "0.2";
diff --git a/pkgs/applications/audio/dfasma/default.nix b/pkgs/applications/audio/dfasma/default.nix
index 20a1044fe24d..3d4e5e5e5b9a 100644
--- a/pkgs/applications/audio/dfasma/default.nix
+++ b/pkgs/applications/audio/dfasma/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchFromGitHub, fftw, libsndfile, qtbase, qtmultimedia, qmake }:
+{ mkDerivation, lib, fetchFromGitHub, fftw, libsndfile, qtbase, qtmultimedia, qmake }:
 
 let
 
diff --git a/pkgs/applications/audio/dr14_tmeter/default.nix b/pkgs/applications/audio/dr14_tmeter/default.nix
index 92e6eb2b3236..80b2cff3ce03 100644
--- a/pkgs/applications/audio/dr14_tmeter/default.nix
+++ b/pkgs/applications/audio/dr14_tmeter/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages, pkgs }:
+{ lib, fetchFromGitHub, python3Packages, pkgs }:
 
 python3Packages.buildPythonApplication rec {
   pname = "dr14_tmeter";
diff --git a/pkgs/applications/audio/faust/faust2jackrust.nix b/pkgs/applications/audio/faust/faust2jackrust.nix
index 77335da2ce79..a93251c8d2d2 100644
--- a/pkgs/applications/audio/faust/faust2jackrust.nix
+++ b/pkgs/applications/audio/faust/faust2jackrust.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, faust
+{ faust
 , libjack2
 , cargo
 , binutils
diff --git a/pkgs/applications/audio/fmit/default.nix b/pkgs/applications/audio/fmit/default.nix
index e22067c38fc7..b91c72a5c754 100644
--- a/pkgs/applications/audio/fmit/default.nix
+++ b/pkgs/applications/audio/fmit/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, fftw, qtbase, qtmultimedia, qmake, itstool, wrapQtAppsHook
+{ lib, mkDerivation, fetchFromGitHub, fftw, qtbase, qtmultimedia, qmake, itstool, wrapQtAppsHook
 , alsaSupport ? true, alsaLib ? null
 , jackSupport ? false, libjack2 ? null
 , portaudioSupport ? false, portaudio ? null }:
diff --git a/pkgs/applications/audio/gnome-podcasts/default.nix b/pkgs/applications/audio/gnome-podcasts/default.nix
index ed51304b2256..1733aef41775 100644
--- a/pkgs/applications/audio/gnome-podcasts/default.nix
+++ b/pkgs/applications/audio/gnome-podcasts/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , rustPlatform
 , fetchFromGitLab
 , fetchpatch
diff --git a/pkgs/applications/audio/gpodder/default.nix b/pkgs/applications/audio/gpodder/default.nix
index dea1f5fe7bcf..229050654cd5 100644
--- a/pkgs/applications/audio/gpodder/default.nix
+++ b/pkgs/applications/audio/gpodder/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3, python3Packages, intltool
+{ lib, fetchFromGitHub, python3, python3Packages, intltool
 , glibcLocales, gnome3, gtk3, wrapGAppsHook
 , gobject-introspection
 }:
diff --git a/pkgs/applications/audio/greg/default.nix b/pkgs/applications/audio/greg/default.nix
index 46e1baed07d3..95f3bf9988cd 100644
--- a/pkgs/applications/audio/greg/default.nix
+++ b/pkgs/applications/audio/greg/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, pythonPackages }:
+{ lib, fetchFromGitHub, pythonPackages }:
 
 with pythonPackages; buildPythonApplication rec {
   pname = "greg";
diff --git a/pkgs/applications/audio/gtklick/default.nix b/pkgs/applications/audio/gtklick/default.nix
index ddd09ce44522..b3b95ca057e5 100644
--- a/pkgs/applications/audio/gtklick/default.nix
+++ b/pkgs/applications/audio/gtklick/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, pythonPackages, gettext, klick}:
+{ lib, fetchurl, pythonPackages, gettext, klick}:
 
 pythonPackages.buildPythonApplication rec {
   pname = "gtklick";
diff --git a/pkgs/applications/audio/jamulus/default.nix b/pkgs/applications/audio/jamulus/default.nix
index c6510f5469c0..13b488ce7d78 100644
--- a/pkgs/applications/audio/jamulus/default.nix
+++ b/pkgs/applications/audio/jamulus/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchFromGitHub, fetchpatch, pkg-config, qtscript, qmake, libjack2
+{ mkDerivation, lib, fetchFromGitHub, fetchpatch, pkg-config, qtscript, qmake, libjack2
 }:
 
 mkDerivation rec {
diff --git a/pkgs/applications/audio/librespot/default.nix b/pkgs/applications/audio/librespot/default.nix
index 7ba47be686ee..13aa4fe5bc27 100644
--- a/pkgs/applications/audio/librespot/default.nix
+++ b/pkgs/applications/audio/librespot/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform, pkg-config, openssl, withRodio ? true
+{ lib, fetchFromGitHub, rustPlatform, pkg-config, openssl, withRodio ? true
 , withALSA ? true, alsaLib ? null, withPulseAudio ? false, libpulseaudio ? null
 , withPortAudio ? false, portaudio ? null }:
 
diff --git a/pkgs/applications/audio/lmms/default.nix b/pkgs/applications/audio/lmms/default.nix
index 4d52a286aba9..11a7d0cf3c6f 100644
--- a/pkgs/applications/audio/lmms/default.nix
+++ b/pkgs/applications/audio/lmms/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, cmake, pkg-config, alsaLib ? null, fftwFloat, fltk13
+{ lib, fetchFromGitHub, cmake, pkg-config, alsaLib ? null, fftwFloat, fltk13
 , fluidsynth_1 ? null, lame ? null, libgig ? null, libjack2 ? null, libpulseaudio ? null
 , libsamplerate, libsoundio ? null, libsndfile, libvorbis ? null, portaudio ? null
 , qtbase, qtx11extras, qttools, SDL ? null, mkDerivation }:
diff --git a/pkgs/applications/audio/mimms/default.nix b/pkgs/applications/audio/mimms/default.nix
index 793ee3d263ab..9811998c3685 100644
--- a/pkgs/applications/audio/mimms/default.nix
+++ b/pkgs/applications/audio/mimms/default.nix
@@ -1,4 +1,4 @@
-{ fetchurl, lib, stdenv, pythonPackages, libmms }:
+{ fetchurl, lib, pythonPackages, libmms }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "mimms";
diff --git a/pkgs/applications/audio/mixxx/default.nix b/pkgs/applications/audio/mixxx/default.nix
index 70e6616482f9..7af4b585adfa 100644
--- a/pkgs/applications/audio/mixxx/default.nix
+++ b/pkgs/applications/audio/mixxx/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchurl, fetchFromGitHub, chromaprint
+{ lib, mkDerivation, fetchurl, fetchFromGitHub, chromaprint
 , fftw, flac, faad2, glibcLocales, mp4v2
 , libid3tag, libmad, libopus, libshout, libsndfile, libusb1, libvorbis
 , libGLU, libxcb, lilv, lv2, opusfile
diff --git a/pkgs/applications/audio/mopidy/gmusic.nix b/pkgs/applications/audio/mopidy/gmusic.nix
index 54af3bc68f1e..6e76d6af87d3 100644
--- a/pkgs/applications/audio/mopidy/gmusic.nix
+++ b/pkgs/applications/audio/mopidy/gmusic.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, mopidy }:
+{ lib, python3Packages, mopidy }:
 
 python3Packages.buildPythonApplication rec {
   pname = "mopidy-gmusic";
diff --git a/pkgs/applications/audio/mopidy/iris.nix b/pkgs/applications/audio/mopidy/iris.nix
index 05827b0bb565..c2171d4cecc4 100644
--- a/pkgs/applications/audio/mopidy/iris.nix
+++ b/pkgs/applications/audio/mopidy/iris.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, mopidy }:
+{ lib, python3Packages, mopidy }:
 
 python3Packages.buildPythonApplication rec {
   pname = "Mopidy-Iris";
diff --git a/pkgs/applications/audio/mopidy/moped.nix b/pkgs/applications/audio/mopidy/moped.nix
index 8daaef7d45d9..c191eba4c4d9 100644
--- a/pkgs/applications/audio/mopidy/moped.nix
+++ b/pkgs/applications/audio/mopidy/moped.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, pythonPackages, mopidy, glibcLocales }:
+{ lib, pythonPackages, mopidy, glibcLocales }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "Mopidy-Moped";
diff --git a/pkgs/applications/audio/mopidy/mopify.nix b/pkgs/applications/audio/mopidy/mopify.nix
index 17e68c165394..670b1a9c5091 100644
--- a/pkgs/applications/audio/mopidy/mopify.nix
+++ b/pkgs/applications/audio/mopidy/mopify.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, pythonPackages, mopidy }:
+{ lib, pythonPackages, mopidy }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "Mopidy-Mopify";
diff --git a/pkgs/applications/audio/mopidy/mpd.nix b/pkgs/applications/audio/mopidy/mpd.nix
index 8d6d7a1528b9..d686d4928989 100644
--- a/pkgs/applications/audio/mopidy/mpd.nix
+++ b/pkgs/applications/audio/mopidy/mpd.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, mopidy }:
+{ lib, python3Packages, mopidy }:
 
 python3Packages.buildPythonApplication rec {
   pname = "Mopidy-MPD";
diff --git a/pkgs/applications/audio/mopidy/mpris.nix b/pkgs/applications/audio/mopidy/mpris.nix
index 868dbaf30358..6327ba020bf9 100644
--- a/pkgs/applications/audio/mopidy/mpris.nix
+++ b/pkgs/applications/audio/mopidy/mpris.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, mopidy }:
+{ lib, python3Packages, mopidy }:
 
 python3Packages.buildPythonApplication rec {
   pname = "mopidy-mpris";
diff --git a/pkgs/applications/audio/mopidy/scrobbler.nix b/pkgs/applications/audio/mopidy/scrobbler.nix
index be38c6a7040d..621ced53646a 100644
--- a/pkgs/applications/audio/mopidy/scrobbler.nix
+++ b/pkgs/applications/audio/mopidy/scrobbler.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, mopidy }:
+{ lib, python3Packages, mopidy }:
 
 python3Packages.buildPythonApplication rec {
   pname = "Mopidy-Scrobbler";
diff --git a/pkgs/applications/audio/mopidy/somafm.nix b/pkgs/applications/audio/mopidy/somafm.nix
index afa46726db7e..0637731dcb57 100644
--- a/pkgs/applications/audio/mopidy/somafm.nix
+++ b/pkgs/applications/audio/mopidy/somafm.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, mopidy }:
+{ lib, python3Packages, mopidy }:
 
 python3Packages.buildPythonApplication rec {
   pname = "mopidy-somafm";
diff --git a/pkgs/applications/audio/mopidy/soundcloud.nix b/pkgs/applications/audio/mopidy/soundcloud.nix
index bdc3523652c0..d8a244b51467 100644
--- a/pkgs/applications/audio/mopidy/soundcloud.nix
+++ b/pkgs/applications/audio/mopidy/soundcloud.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, pythonPackages, mopidy }:
+{ lib, fetchFromGitHub, pythonPackages, mopidy }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "mopidy-soundcloud";
diff --git a/pkgs/applications/audio/mopidy/spotify-tunigo.nix b/pkgs/applications/audio/mopidy/spotify-tunigo.nix
index 8fafab0970f8..70d076190cda 100644
--- a/pkgs/applications/audio/mopidy/spotify-tunigo.nix
+++ b/pkgs/applications/audio/mopidy/spotify-tunigo.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, pythonPackages, mopidy, mopidy-spotify }:
+{ lib, fetchFromGitHub, pythonPackages, mopidy, mopidy-spotify }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "mopidy-spotify-tunigo";
diff --git a/pkgs/applications/audio/mopidy/spotify.nix b/pkgs/applications/audio/mopidy/spotify.nix
index 57ba6ea1f615..e44b9f35daaf 100644
--- a/pkgs/applications/audio/mopidy/spotify.nix
+++ b/pkgs/applications/audio/mopidy/spotify.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, pythonPackages, mopidy }:
+{ lib, fetchurl, pythonPackages, mopidy }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "mopidy-spotify";
diff --git a/pkgs/applications/audio/mopidy/tunein.nix b/pkgs/applications/audio/mopidy/tunein.nix
index d8a6d6eacca6..4a3edd2a4344 100644
--- a/pkgs/applications/audio/mopidy/tunein.nix
+++ b/pkgs/applications/audio/mopidy/tunein.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, mopidy }:
+{ lib, python3Packages, mopidy }:
 
 python3Packages.buildPythonApplication rec {
   pname = "mopidy-tunein";
diff --git a/pkgs/applications/audio/mopidy/youtube.nix b/pkgs/applications/audio/mopidy/youtube.nix
index 35a85b958018..b84a756c2ce1 100644
--- a/pkgs/applications/audio/mopidy/youtube.nix
+++ b/pkgs/applications/audio/mopidy/youtube.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, mopidy }:
+{ lib, python3Packages, mopidy }:
 
 python3Packages.buildPythonApplication rec {
   pname = "mopidy-youtube";
diff --git a/pkgs/applications/audio/munt/default.nix b/pkgs/applications/audio/munt/default.nix
index 6d010c6cd956..0efe034034ac 100644
--- a/pkgs/applications/audio/munt/default.nix
+++ b/pkgs/applications/audio/munt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, cmake, qtbase, alsaLib, makeDesktopItem, libjack2 }:
+{ lib, mkDerivation, fetchFromGitHub, cmake, qtbase, alsaLib, makeDesktopItem, libjack2 }:
 
 let
   desktopItem = makeDesktopItem rec {
diff --git a/pkgs/applications/audio/musescore/default.nix b/pkgs/applications/audio/musescore/default.nix
index ff39e62e7290..47f8e5a22e62 100644
--- a/pkgs/applications/audio/musescore/default.nix
+++ b/pkgs/applications/audio/musescore/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, mkDerivation, lib, fetchFromGitHub, cmake, pkg-config
+{ mkDerivation, lib, fetchFromGitHub, cmake, pkg-config
 , alsaLib, freetype, libjack2, lame, libogg, libpulseaudio, libsndfile, libvorbis
 , portaudio, portmidi, qtbase, qtdeclarative, qtgraphicaleffects
 , qtquickcontrols2, qtscript, qtsvg, qttools
diff --git a/pkgs/applications/audio/noisetorch/default.nix b/pkgs/applications/audio/noisetorch/default.nix
index bb22b3cec221..fea6e097de7a 100644
--- a/pkgs/applications/audio/noisetorch/default.nix
+++ b/pkgs/applications/audio/noisetorch/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, rnnoise-plugin }:
+{ lib, buildGoModule, fetchFromGitHub, rnnoise-plugin }:
 
 buildGoModule rec {
   pname = "NoiseTorch";
diff --git a/pkgs/applications/audio/padthv1/default.nix b/pkgs/applications/audio/padthv1/default.nix
index 1d84aed8b2e7..f238a6876099 100644
--- a/pkgs/applications/audio/padthv1/default.nix
+++ b/pkgs/applications/audio/padthv1/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, pkg-config, libjack2, alsaLib, libsndfile, liblo, lv2, qt5, fftwFloat, mkDerivation }:
+{ lib, fetchurl, pkg-config, libjack2, alsaLib, libsndfile, liblo, lv2, qt5, fftwFloat, mkDerivation }:
 
 mkDerivation rec {
   pname = "padthv1";
diff --git a/pkgs/applications/audio/picard/default.nix b/pkgs/applications/audio/picard/default.nix
index 733cb702c7e5..200e457c5685 100644
--- a/pkgs/applications/audio/picard/default.nix
+++ b/pkgs/applications/audio/picard/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, fetchFromGitHub, gettext, chromaprint, qt5
+{ lib, python3Packages, fetchFromGitHub, gettext, chromaprint, qt5
 , enablePlayback ? true
 , gst_all_1
 }:
diff --git a/pkgs/applications/audio/pithos/default.nix b/pkgs/applications/audio/pithos/default.nix
index c64371f091c2..939b53c44fb1 100644
--- a/pkgs/applications/audio/pithos/default.nix
+++ b/pkgs/applications/audio/pithos/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, meson, ninja, pkg-config, appstream-glib
+{ lib, fetchFromGitHub, meson, ninja, pkg-config, appstream-glib
 , wrapGAppsHook, pythonPackages, gtk3, gnome3, gobject-introspection
 , libnotify, libsecret, gst_all_1 }:
 
diff --git a/pkgs/applications/audio/polyphone/default.nix b/pkgs/applications/audio/polyphone/default.nix
index 05800c360fae..a331952aa81d 100644
--- a/pkgs/applications/audio/polyphone/default.nix
+++ b/pkgs/applications/audio/polyphone/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, qmake, pkg-config, alsaLib, libjack2, portaudio, libogg, flac, libvorbis, rtmidi, qtsvg }:
+{ lib, mkDerivation, fetchFromGitHub, qmake, pkg-config, alsaLib, libjack2, portaudio, libogg, flac, libvorbis, rtmidi, qtsvg }:
 
 mkDerivation rec {
   version = "2.2.0";
diff --git a/pkgs/applications/audio/puddletag/default.nix b/pkgs/applications/audio/puddletag/default.nix
index 94a571df2944..efa1d9436100 100644
--- a/pkgs/applications/audio/puddletag/default.nix
+++ b/pkgs/applications/audio/puddletag/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages, wrapQtAppsHook, chromaprint }:
+{ lib, fetchFromGitHub, python3Packages, wrapQtAppsHook, chromaprint }:
 
 python3Packages.buildPythonApplication rec {
   pname = "puddletag";
diff --git a/pkgs/applications/audio/pulseaudio-dlna/default.nix b/pkgs/applications/audio/pulseaudio-dlna/default.nix
index a19a03d4bd2a..83de192c6b31 100644
--- a/pkgs/applications/audio/pulseaudio-dlna/default.nix
+++ b/pkgs/applications/audio/pulseaudio-dlna/default.nix
@@ -1,4 +1,4 @@
-{ fetchFromGitHub, lib, stdenv, pythonPackages
+{ fetchFromGitHub, lib, pythonPackages
 , mp3Support ? true, lame ? null
 , opusSupport ? true, opusTools ? null
 , faacSupport ? false, faac ? null
diff --git a/pkgs/applications/audio/pulseaudio-dlna/zeroconf.nix b/pkgs/applications/audio/pulseaudio-dlna/zeroconf.nix
index 0e3eeac984a2..d4f3306697d7 100644
--- a/pkgs/applications/audio/pulseaudio-dlna/zeroconf.nix
+++ b/pkgs/applications/audio/pulseaudio-dlna/zeroconf.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , ifaddr
diff --git a/pkgs/applications/audio/qjackctl/default.nix b/pkgs/applications/audio/qjackctl/default.nix
index 719ddd28e2ad..586dfeae7331 100644
--- a/pkgs/applications/audio/qjackctl/default.nix
+++ b/pkgs/applications/audio/qjackctl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub
+{ lib, mkDerivation, fetchFromGitHub
 , pkg-config, cmake, alsaLib, libjack2, dbus, qtbase, qttools, qtx11extras
 # Enable jack session support
 , jackSession ? false
diff --git a/pkgs/applications/audio/qmmp/default.nix b/pkgs/applications/audio/qmmp/default.nix
index 950e16cedc8b..f079b99af771 100644
--- a/pkgs/applications/audio/qmmp/default.nix
+++ b/pkgs/applications/audio/qmmp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchurl, cmake, pkg-config, xlibsWrapper
+{ lib, mkDerivation, fetchurl, cmake, pkg-config, xlibsWrapper
 , qtbase, qttools, qtmultimedia, qtx11extras
 # transports
 , curl, libmms
diff --git a/pkgs/applications/audio/qsampler/default.nix b/pkgs/applications/audio/qsampler/default.nix
index 03f519d3816e..bb40e0b3eebc 100644
--- a/pkgs/applications/audio/qsampler/default.nix
+++ b/pkgs/applications/audio/qsampler/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, autoconf, automake, libtool, pkg-config, qttools
+{ lib, fetchurl, autoconf, automake, libtool, pkg-config, qttools
 , liblscp, libgig, qtbase, mkDerivation }:
 
 mkDerivation rec {
diff --git a/pkgs/applications/audio/qsynth/default.nix b/pkgs/applications/audio/qsynth/default.nix
index 4b712bf1d254..f708207cce91 100644
--- a/pkgs/applications/audio/qsynth/default.nix
+++ b/pkgs/applications/audio/qsynth/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, alsaLib, fluidsynth, libjack2, autoconf, pkg-config
+{ lib, fetchurl, alsaLib, fluidsynth, libjack2, autoconf, pkg-config
 , mkDerivation, qtbase, qttools, qtx11extras
 }:
 
diff --git a/pkgs/applications/audio/qtractor/default.nix b/pkgs/applications/audio/qtractor/default.nix
index 493a99f6b71b..f19d0f70fdf4 100644
--- a/pkgs/applications/audio/qtractor/default.nix
+++ b/pkgs/applications/audio/qtractor/default.nix
@@ -24,7 +24,7 @@
 , serd
 , sord
 , sratom
-, lib, stdenv
+, lib
 , suil
 }:
 
diff --git a/pkgs/applications/audio/shortwave/default.nix b/pkgs/applications/audio/shortwave/default.nix
index 2cc8c53f6072..a503d3b344cb 100644
--- a/pkgs/applications/audio/shortwave/default.nix
+++ b/pkgs/applications/audio/shortwave/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitLab
 , cargo
 , dbus
diff --git a/pkgs/applications/audio/sonata/default.nix b/pkgs/applications/audio/sonata/default.nix
index bc098cedaf40..83af7985dbe2 100644
--- a/pkgs/applications/audio/sonata/default.nix
+++ b/pkgs/applications/audio/sonata/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, wrapGAppsHook, gettext
+{ lib, fetchFromGitHub, wrapGAppsHook, gettext
 , python3Packages, gnome3, gtk3, glib, gdk-pixbuf, gsettings-desktop-schemas, gobject-introspection }:
 
 let
diff --git a/pkgs/applications/audio/spotify-cli-linux/default.nix b/pkgs/applications/audio/spotify-cli-linux/default.nix
index 593ad9468eba..e473d97ce56c 100644
--- a/pkgs/applications/audio/spotify-cli-linux/default.nix
+++ b/pkgs/applications/audio/spotify-cli-linux/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, dbus }:
+{ lib, python3Packages, dbus }:
 python3Packages.buildPythonApplication rec {
   pname = "spotify-cli-linux";
   version = "1.6.0";
diff --git a/pkgs/applications/audio/synthv1/default.nix b/pkgs/applications/audio/synthv1/default.nix
index 8097ee909305..50e16c355e2b 100644
--- a/pkgs/applications/audio/synthv1/default.nix
+++ b/pkgs/applications/audio/synthv1/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchurl, pkg-config, qtbase, qttools, libjack2, alsaLib, liblo, lv2 }:
+{ mkDerivation, lib, fetchurl, pkg-config, qtbase, qttools, libjack2, alsaLib, liblo, lv2 }:
 
 mkDerivation rec {
   pname = "synthv1";
diff --git a/pkgs/applications/audio/traverso/default.nix b/pkgs/applications/audio/traverso/default.nix
index 1cb9795005c1..71a91dc3105e 100644
--- a/pkgs/applications/audio/traverso/default.nix
+++ b/pkgs/applications/audio/traverso/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchurl, cmake, pkg-config
+{ mkDerivation, lib, fetchurl, cmake, pkg-config
 , alsaLib, fftw, flac, lame, libjack2, libmad, libpulseaudio
 , libsamplerate, libsndfile, libvorbis, portaudio, qtbase, wavpack
 }:
diff --git a/pkgs/applications/audio/whipper/default.nix b/pkgs/applications/audio/whipper/default.nix
index 8a46a06efcee..97d42eb9c69f 100644
--- a/pkgs/applications/audio/whipper/default.nix
+++ b/pkgs/applications/audio/whipper/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3, cdparanoia, cdrdao, flac
+{ lib, fetchFromGitHub, python3, cdparanoia, cdrdao, flac
 , sox, accuraterip-checksum, libsndfile, util-linux, substituteAll }:
 
 python3.pkgs.buildPythonApplication rec {
diff --git a/pkgs/applications/blockchains/ethabi.nix b/pkgs/applications/blockchains/ethabi.nix
index ec142cc723ef..8cf3295ccab3 100644
--- a/pkgs/applications/blockchains/ethabi.nix
+++ b/pkgs/applications/blockchains/ethabi.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage rec {
   pname = "ethabi";
diff --git a/pkgs/applications/blockchains/ledger-live-desktop/default.nix b/pkgs/applications/blockchains/ledger-live-desktop/default.nix
index 54805f2512fe..21e5a124f7da 100644
--- a/pkgs/applications/blockchains/ledger-live-desktop/default.nix
+++ b/pkgs/applications/blockchains/ledger-live-desktop/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, makeDesktopItem, appimageTools, imagemagick }:
+{ lib, fetchurl, makeDesktopItem, appimageTools, imagemagick }:
 
 let
   pname = "ledger-live-desktop";
diff --git a/pkgs/applications/blockchains/quorum.nix b/pkgs/applications/blockchains/quorum.nix
index 499e2a77c6f6..1424ddc9516f 100644
--- a/pkgs/applications/blockchains/quorum.nix
+++ b/pkgs/applications/blockchains/quorum.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoPackage, git, which, removeReferencesTo, go }:
+{ lib, fetchFromGitHub, buildGoPackage, git, which, removeReferencesTo, go }:
 
 buildGoPackage rec {
   pname = "quorum";
diff --git a/pkgs/applications/blockchains/turbo-geth.nix b/pkgs/applications/blockchains/turbo-geth.nix
index 79a1eda3495a..dcfba4171494 100644
--- a/pkgs/applications/blockchains/turbo-geth.nix
+++ b/pkgs/applications/blockchains/turbo-geth.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "turbo-geth";
diff --git a/pkgs/applications/editors/emacs-modes/sv-kalender/default.nix b/pkgs/applications/editors/emacs-modes/sv-kalender/default.nix
index dd553fc19980..ea871ccf414f 100644
--- a/pkgs/applications/editors/emacs-modes/sv-kalender/default.nix
+++ b/pkgs/applications/editors/emacs-modes/sv-kalender/default.nix
@@ -1,4 +1,4 @@
-{ fetchurl, lib, stdenv, trivialBuild }:
+{ fetchurl, lib, trivialBuild }:
 
 trivialBuild {
   pname = "sv-kalender";
diff --git a/pkgs/applications/editors/featherpad/default.nix b/pkgs/applications/editors/featherpad/default.nix
index 059d49151d86..c73238ce3661 100644
--- a/pkgs/applications/editors/featherpad/default.nix
+++ b/pkgs/applications/editors/featherpad/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, pkg-config, qmake, qttools, qtbase, qtsvg, qtx11extras, fetchFromGitHub }:
+{ lib, mkDerivation, pkg-config, qmake, qttools, qtbase, qtsvg, qtx11extras, fetchFromGitHub }:
 mkDerivation rec {
   pname = "featherpad";
   version = "0.10.0";
diff --git a/pkgs/applications/editors/focuswriter/default.nix b/pkgs/applications/editors/focuswriter/default.nix
index 31a7026106eb..d47c315f613a 100644
--- a/pkgs/applications/editors/focuswriter/default.nix
+++ b/pkgs/applications/editors/focuswriter/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, pkg-config, qmake, qttools, hunspell, qtbase, qtmultimedia, mkDerivation }:
+{ lib, fetchurl, pkg-config, qmake, qttools, hunspell, qtbase, qtmultimedia, mkDerivation }:
 
 mkDerivation rec {
   pname = "focuswriter";
diff --git a/pkgs/applications/editors/hecate/default.nix b/pkgs/applications/editors/hecate/default.nix
index a0fdcfbb3f66..5429497d209e 100644
--- a/pkgs/applications/editors/hecate/default.nix
+++ b/pkgs/applications/editors/hecate/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   version = "0.0.1";
diff --git a/pkgs/applications/editors/hexdino/default.nix b/pkgs/applications/editors/hexdino/default.nix
index 5d782aa1abcb..f92a4557ac7a 100644
--- a/pkgs/applications/editors/hexdino/default.nix
+++ b/pkgs/applications/editors/hexdino/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform, ncurses }:
+{ lib, fetchFromGitHub, rustPlatform, ncurses }:
 
 rustPlatform.buildRustPackage {
   pname = "hexdino";
diff --git a/pkgs/applications/editors/kibi/default.nix b/pkgs/applications/editors/kibi/default.nix
index 07454d331c6f..71833be33002 100644
--- a/pkgs/applications/editors/kibi/default.nix
+++ b/pkgs/applications/editors/kibi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , rustPlatform
 }:
diff --git a/pkgs/applications/editors/manuskript/default.nix b/pkgs/applications/editors/manuskript/default.nix
index cc39da90c237..49dafe8fc1a3 100644
--- a/pkgs/applications/editors/manuskript/default.nix
+++ b/pkgs/applications/editors/manuskript/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, zlib, fetchFromGitHub, python3Packages, wrapQtAppsHook }:
+{ lib, zlib, fetchFromGitHub, python3Packages, wrapQtAppsHook }:
 
 python3Packages.buildPythonApplication rec {
   pname = "manuskript";
diff --git a/pkgs/applications/editors/mindforger/default.nix b/pkgs/applications/editors/mindforger/default.nix
index a8e60cddfbb8..512e0f124411 100644
--- a/pkgs/applications/editors/mindforger/default.nix
+++ b/pkgs/applications/editors/mindforger/default.nix
@@ -4,7 +4,7 @@
 , qmake
 , qtbase
 , qtwebkit
-, lib, stdenv
+, lib
 , wrapGAppsHook
 }:
 
diff --git a/pkgs/applications/editors/neovim/gnvim/default.nix b/pkgs/applications/editors/neovim/gnvim/default.nix
index f1d56584e499..208339c2e38d 100644
--- a/pkgs/applications/editors/neovim/gnvim/default.nix
+++ b/pkgs/applications/editors/neovim/gnvim/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, rustPlatform, fetchFromGitHub, gtk, webkitgtk }:
+{ lib, rustPlatform, fetchFromGitHub, gtk, webkitgtk }:
 
 rustPlatform.buildRustPackage rec {
   pname = "gnvim-unwrapped";
diff --git a/pkgs/applications/editors/neovim/neovim-remote.nix b/pkgs/applications/editors/neovim/neovim-remote.nix
index 1d82e70f5c4d..867e22751284 100644
--- a/pkgs/applications/editors/neovim/neovim-remote.nix
+++ b/pkgs/applications/editors/neovim/neovim-remote.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, pythonPackages }:
+{ lib, fetchFromGitHub, pythonPackages }:
 
 with lib;
 
diff --git a/pkgs/applications/editors/okteta/default.nix b/pkgs/applications/editors/okteta/default.nix
index d51f46b9e0a4..b2011c5d8e65 100644
--- a/pkgs/applications/editors/okteta/default.nix
+++ b/pkgs/applications/editors/okteta/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchurl, extra-cmake-modules, kdoctools, qtscript, kconfig
+{ mkDerivation, lib, fetchurl, extra-cmake-modules, kdoctools, qtscript, kconfig
 , kinit, karchive, kcrash, kcmutils, kconfigwidgets, knewstuff, kparts
 , qca-qt5, shared-mime-info }:
 
diff --git a/pkgs/applications/editors/retext/default.nix b/pkgs/applications/editors/retext/default.nix
index 99f7340f7536..6bf0f191ece2 100644
--- a/pkgs/applications/editors/retext/default.nix
+++ b/pkgs/applications/editors/retext/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3, fetchFromGitHub, wrapQtAppsHook, buildEnv, aspellDicts
+{ lib, python3, fetchFromGitHub, wrapQtAppsHook, buildEnv, aspellDicts
 # Use `lib.collect lib.isDerivation aspellDicts;` to make all dictionaries
 # available.
 , enchantAspellDicts ? with aspellDicts; [ en en-computers en-science ]
diff --git a/pkgs/applications/editors/sigil/default.nix b/pkgs/applications/editors/sigil/default.nix
index 1094c3c75535..b34441d100c3 100644
--- a/pkgs/applications/editors/sigil/default.nix
+++ b/pkgs/applications/editors/sigil/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, cmake, pkg-config, makeWrapper
+{ lib, mkDerivation, fetchFromGitHub, cmake, pkg-config, makeWrapper
 , boost, xercesc, hunspell, zlib, pcre16
 , qtbase, qttools, qtwebengine, qtxmlpatterns
 , python3Packages
diff --git a/pkgs/applications/editors/texmacs/common.nix b/pkgs/applications/editors/texmacs/common.nix
index 3ffcc8ecf45c..e52d95f837df 100644
--- a/pkgs/applications/editors/texmacs/common.nix
+++ b/pkgs/applications/editors/texmacs/common.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, tex, extraFonts, chineseFonts, japaneseFonts, koreanFonts }:
+{ lib, fetchurl, tex, extraFonts, chineseFonts, japaneseFonts, koreanFonts }:
 rec {
   extraFontsSrc = fetchurl {
     url = "ftp://ftp.texmacs.org/pub/TeXmacs/fonts/TeXmacs-extra-fonts-1.0-noarch.tar.gz";
diff --git a/pkgs/applications/editors/thonny/default.nix b/pkgs/applications/editors/thonny/default.nix
index e98d57420e81..39aefe3fa163 100644
--- a/pkgs/applications/editors/thonny/default.nix
+++ b/pkgs/applications/editors/thonny/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3 }:
+{ lib, fetchFromGitHub, python3 }:
 
 with python3.pkgs;
 
diff --git a/pkgs/applications/editors/tiled/default.nix b/pkgs/applications/editors/tiled/default.nix
index f5306e75a56c..b6222c8a6d2c 100644
--- a/pkgs/applications/editors/tiled/default.nix
+++ b/pkgs/applications/editors/tiled/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, pkg-config, qmake
+{ lib, mkDerivation, fetchFromGitHub, pkg-config, qmake
 , python, qtbase, qttools }:
 
 mkDerivation rec {
diff --git a/pkgs/applications/graphics/displaycal/default.nix b/pkgs/applications/graphics/displaycal/default.nix
index d1cee064aee6..3b6bb01bb150 100644
--- a/pkgs/applications/graphics/displaycal/default.nix
+++ b/pkgs/applications/graphics/displaycal/default.nix
@@ -1,5 +1,5 @@
 { python2
-, lib, stdenv
+, lib
 , fetchurl
 , pkg-config
 , libXext
diff --git a/pkgs/applications/graphics/dosage/default.nix b/pkgs/applications/graphics/dosage/default.nix
index b2997c2c474a..db0012a184be 100644
--- a/pkgs/applications/graphics/dosage/default.nix
+++ b/pkgs/applications/graphics/dosage/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, fetchFromGitHub }:
+{ lib, python3Packages, fetchFromGitHub }:
 
 python3Packages.buildPythonApplication rec {
   pname = "dosage";
diff --git a/pkgs/applications/graphics/freecad/default.nix b/pkgs/applications/graphics/freecad/default.nix
index 3563220f2b87..1c4f05b42dac 100644
--- a/pkgs/applications/graphics/freecad/default.nix
+++ b/pkgs/applications/graphics/freecad/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, fetchpatch, cmake, ninja, coin3d,
+{ lib, mkDerivation, fetchFromGitHub, fetchpatch, cmake, ninja, coin3d,
 xercesc, ode, eigen, qtbase, qttools, qtwebengine, qtxmlpatterns, wrapQtAppsHook,
 opencascade-occt, gts, hdf5, vtk, medfile, zlib, python3Packages, swig,
 gfortran, libXmu, soqt, libf2c, libGLU, makeWrapper, pkg-config, mpi ? null }:
diff --git a/pkgs/applications/graphics/gimp/wrapper.nix b/pkgs/applications/graphics/gimp/wrapper.nix
index 094dcf0703e4..8fde04d0d1df 100644
--- a/pkgs/applications/graphics/gimp/wrapper.nix
+++ b/pkgs/applications/graphics/gimp/wrapper.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, symlinkJoin, gimp, makeWrapper, gimpPlugins, gnome3, plugins ? null}:
+{ lib, symlinkJoin, gimp, makeWrapper, gimpPlugins, gnome3, plugins ? null}:
 
 let
 allPlugins = lib.filter (pkg: lib.isDerivation pkg && !pkg.meta.broken or false) (lib.attrValues gimpPlugins);
diff --git a/pkgs/applications/graphics/gscan2pdf/default.nix b/pkgs/applications/graphics/gscan2pdf/default.nix
index 30c211498279..0e65d3199ab5 100644
--- a/pkgs/applications/graphics/gscan2pdf/default.nix
+++ b/pkgs/applications/graphics/gscan2pdf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, perlPackages, wrapGAppsHook,
+{ lib, fetchurl, perlPackages, wrapGAppsHook,
   # libs
   librsvg, sane-backends, sane-frontends,
   # runtime dependencies
diff --git a/pkgs/applications/graphics/hydrus/default.nix b/pkgs/applications/graphics/hydrus/default.nix
index 95b96bcff1b3..f5b8b8062155 100644
--- a/pkgs/applications/graphics/hydrus/default.nix
+++ b/pkgs/applications/graphics/hydrus/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , lzma
 , qt5
diff --git a/pkgs/applications/graphics/ipe/default.nix b/pkgs/applications/graphics/ipe/default.nix
index 1ea21506e314..d9c51d38802e 100644
--- a/pkgs/applications/graphics/ipe/default.nix
+++ b/pkgs/applications/graphics/ipe/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, makeWrapper, pkg-config, zlib, freetype, cairo, lua5, texlive, ghostscript
+{ lib, fetchurl, makeWrapper, pkg-config, zlib, freetype, cairo, lua5, texlive, ghostscript
 , libjpeg, libpng, qtbase, mkDerivation
 }:
 
diff --git a/pkgs/applications/graphics/kgraphviewer/default.nix b/pkgs/applications/graphics/kgraphviewer/default.nix
index 283ed1179544..294b6c4ca701 100644
--- a/pkgs/applications/graphics/kgraphviewer/default.nix
+++ b/pkgs/applications/graphics/kgraphviewer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchurl, cmake, extra-cmake-modules, pkg-config, wrapGAppsHook
+{ lib, mkDerivation, fetchurl, cmake, extra-cmake-modules, pkg-config, wrapGAppsHook
 , kconfig, kinit, kdoctools, kio, kparts, kwidgetsaddons
 , qtbase, qtsvg
 , boost, graphviz
diff --git a/pkgs/applications/graphics/krop/default.nix b/pkgs/applications/graphics/krop/default.nix
index 314e4c6ec140..ef335cd6be2a 100644
--- a/pkgs/applications/graphics/krop/default.nix
+++ b/pkgs/applications/graphics/krop/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages, libsForQt5, ghostscript, qt5}:
+{ lib, fetchFromGitHub, python3Packages, libsForQt5, ghostscript, qt5}:
 
 python3Packages.buildPythonApplication rec {
   pname = "krop";
diff --git a/pkgs/applications/graphics/luminance-hdr/default.nix b/pkgs/applications/graphics/luminance-hdr/default.nix
index 36154af137bd..c44ff57d18f3 100644
--- a/pkgs/applications/graphics/luminance-hdr/default.nix
+++ b/pkgs/applications/graphics/luminance-hdr/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, cmake, fetchFromGitHub, pkg-config
+{ lib, mkDerivation, cmake, fetchFromGitHub, pkg-config
 , boost, exiv2, fftwFloat, gsl
 , ilmbase, lcms2, libraw, libtiff, openexr
 , qtbase, qtdeclarative, qttools, qtwebengine, eigen
diff --git a/pkgs/applications/graphics/mcomix3/default.nix b/pkgs/applications/graphics/mcomix3/default.nix
index 81077578eb27..add40043c0fa 100644
--- a/pkgs/applications/graphics/mcomix3/default.nix
+++ b/pkgs/applications/graphics/mcomix3/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , fetchFromGitHub
 , wrapGAppsHook
 , installShellFiles
diff --git a/pkgs/applications/graphics/meme/default.nix b/pkgs/applications/graphics/meme/default.nix
index c894de2c9330..d06ff027c5bb 100644
--- a/pkgs/applications/graphics/meme/default.nix
+++ b/pkgs/applications/graphics/meme/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , unstableGitUpdater
 , buildGoModule
 , fetchFromGitHub
diff --git a/pkgs/applications/graphics/mypaint/default.nix b/pkgs/applications/graphics/mypaint/default.nix
index 9da9c20942ec..7b83bdec8c6b 100644
--- a/pkgs/applications/graphics/mypaint/default.nix
+++ b/pkgs/applications/graphics/mypaint/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , gtk3
 , gettext
diff --git a/pkgs/applications/graphics/nomacs/default.nix b/pkgs/applications/graphics/nomacs/default.nix
index 8a3e41965ffe..bd6d732ac684 100644
--- a/pkgs/applications/graphics/nomacs/default.nix
+++ b/pkgs/applications/graphics/nomacs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , mkDerivation
 , fetchFromGitHub
 , fetchpatch
diff --git a/pkgs/applications/graphics/paraview/default.nix b/pkgs/applications/graphics/paraview/default.nix
index 7bbff5499f65..79feab3ab7ae 100644
--- a/pkgs/applications/graphics/paraview/default.nix
+++ b/pkgs/applications/graphics/paraview/default.nix
@@ -1,6 +1,6 @@
 { boost, cmake, fetchFromGitHub, ffmpeg, qtbase, qtx11extras,
   qttools, qtxmlpatterns, qtsvg, gdal, gfortran, libXt, makeWrapper,
-  mkDerivation, ninja, mpi, python3, lib, stdenv, tbb, libGLU, libGL }:
+  mkDerivation, ninja, mpi, python3, lib, tbb, libGLU, libGL }:
 
 mkDerivation rec {
   pname = "paraview";
diff --git a/pkgs/applications/graphics/pdfcpu/default.nix b/pkgs/applications/graphics/pdfcpu/default.nix
index bcc094981214..857a68df0923 100644
--- a/pkgs/applications/graphics/pdfcpu/default.nix
+++ b/pkgs/applications/graphics/pdfcpu/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "pdfcpu";
diff --git a/pkgs/applications/graphics/photoflare/default.nix b/pkgs/applications/graphics/photoflare/default.nix
index ca2455dd048c..0c25364b76aa 100644
--- a/pkgs/applications/graphics/photoflare/default.nix
+++ b/pkgs/applications/graphics/photoflare/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, graphicsmagick, fetchFromGitHub, qmake, qtbase, qttools
+{ mkDerivation, lib, graphicsmagick, fetchFromGitHub, qmake, qtbase, qttools
 }:
 
 mkDerivation rec {
diff --git a/pkgs/applications/graphics/photoqt/default.nix b/pkgs/applications/graphics/photoqt/default.nix
index fe49d5fa154d..52e38b23c1ff 100644
--- a/pkgs/applications/graphics/photoqt/default.nix
+++ b/pkgs/applications/graphics/photoqt/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchurl, cmake, exiv2, graphicsmagick, libraw, fetchpatch
+{ mkDerivation, lib, fetchurl, cmake, exiv2, graphicsmagick, libraw, fetchpatch
 , qtbase, qtdeclarative, qtmultimedia, qtquickcontrols, qttools, qtgraphicaleffects
 , extra-cmake-modules, poppler, kimageformats, libarchive, libdevil
 }:
diff --git a/pkgs/applications/graphics/phototonic/default.nix b/pkgs/applications/graphics/phototonic/default.nix
index 21960358a7bd..5044e60161cf 100644
--- a/pkgs/applications/graphics/phototonic/default.nix
+++ b/pkgs/applications/graphics/phototonic/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchFromGitHub, qtbase, qmake, exiv2 }:
+{ mkDerivation, lib, fetchFromGitHub, qtbase, qmake, exiv2 }:
 
 mkDerivation rec {
   pname = "phototonic";
diff --git a/pkgs/applications/graphics/pick-colour-picker/default.nix b/pkgs/applications/graphics/pick-colour-picker/default.nix
index d4788b3c1e76..e3ab0c772a1d 100644
--- a/pkgs/applications/graphics/pick-colour-picker/default.nix
+++ b/pkgs/applications/graphics/pick-colour-picker/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , buildPythonPackage
 , pygobject3
diff --git a/pkgs/applications/graphics/pinta/default.nix b/pkgs/applications/graphics/pinta/default.nix
index 8b6e581ae0b1..2635b2d3d886 100644
--- a/pkgs/applications/graphics/pinta/default.nix
+++ b/pkgs/applications/graphics/pinta/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildDotnetPackage, dotnetPackages, gtksharp,
+{ lib, fetchFromGitHub, buildDotnetPackage, dotnetPackages, gtksharp,
   gettext }:
 
 let
diff --git a/pkgs/applications/graphics/qcomicbook/default.nix b/pkgs/applications/graphics/qcomicbook/default.nix
index c4fc79c7fecd..47bf2d950283 100644
--- a/pkgs/applications/graphics/qcomicbook/default.nix
+++ b/pkgs/applications/graphics/qcomicbook/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchFromGitHub, pkg-config, cmake, qtbase, qttools, qtx11extras, poppler }:
+{ mkDerivation, lib, fetchFromGitHub, pkg-config, cmake, qtbase, qttools, qtx11extras, poppler }:
 
 mkDerivation rec {
   pname = "qcomicbook";
diff --git a/pkgs/applications/graphics/rapid-photo-downloader/default.nix b/pkgs/applications/graphics/rapid-photo-downloader/default.nix
index 26522d78bcdd..f444ebfe5be3 100644
--- a/pkgs/applications/graphics/rapid-photo-downloader/default.nix
+++ b/pkgs/applications/graphics/rapid-photo-downloader/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivationWith, fetchurl, python3Packages
+{ lib, mkDerivationWith, fetchurl, python3Packages
 , file, intltool, gobject-introspection, libgudev
 , udisks, gexiv2, gst_all_1, libnotify
 , exiftool, gdk-pixbuf, libmediainfo, vmtouch
diff --git a/pkgs/applications/graphics/renderdoc/default.nix b/pkgs/applications/graphics/renderdoc/default.nix
index b985ae7d5716..c51794881e94 100644
--- a/pkgs/applications/graphics/renderdoc/default.nix
+++ b/pkgs/applications/graphics/renderdoc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, cmake, pkg-config, mkDerivation
+{ lib, fetchFromGitHub, cmake, pkg-config, mkDerivation
 , qtbase, qtx11extras, qtsvg, makeWrapper
 , vulkan-loader, libglvnd, xorg, python3, python3Packages
 , bison, pcre, automake, autoconf, addOpenGLRunpath
diff --git a/pkgs/applications/graphics/scantailor/advanced.nix b/pkgs/applications/graphics/scantailor/advanced.nix
index 361f1fa18094..048b8b56fc08 100644
--- a/pkgs/applications/graphics/scantailor/advanced.nix
+++ b/pkgs/applications/graphics/scantailor/advanced.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, mkDerivation
+{ lib, fetchFromGitHub, mkDerivation
 , cmake, libjpeg, libpng, libtiff, boost
 , qtbase, qttools }:
 
diff --git a/pkgs/applications/graphics/tesseract/wrapper.nix b/pkgs/applications/graphics/tesseract/wrapper.nix
index 22751f38fe1e..313920d8154e 100644
--- a/pkgs/applications/graphics/tesseract/wrapper.nix
+++ b/pkgs/applications/graphics/tesseract/wrapper.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, makeWrapper, tesseractBase, languages
+{ lib, makeWrapper, tesseractBase, languages
 
 # A list of languages like [ "eng" "spa" … ] or `null` for all available languages
 , enableLanguages ? null
diff --git a/pkgs/applications/logging/humioctl/default.nix b/pkgs/applications/logging/humioctl/default.nix
index 0130017356c7..f3aef213ad28 100644
--- a/pkgs/applications/logging/humioctl/default.nix
+++ b/pkgs/applications/logging/humioctl/default.nix
@@ -1,4 +1,4 @@
-{ buildGoModule, fetchFromGitHub, installShellFiles, lib, stdenv }:
+{ buildGoModule, fetchFromGitHub, installShellFiles, lib }:
 
 let
   humioCtlVersion = "0.28.2";
diff --git a/pkgs/applications/misc/antfs-cli/default.nix b/pkgs/applications/misc/antfs-cli/default.nix
index 133194f7af51..516b786222db 100644
--- a/pkgs/applications/misc/antfs-cli/default.nix
+++ b/pkgs/applications/misc/antfs-cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 python3Packages.buildPythonApplication {
   pname = "antfs-cli";
diff --git a/pkgs/applications/misc/ape/apeclex.nix b/pkgs/applications/misc/ape/apeclex.nix
index b01bfbedb8a6..81096d9877f7 100644
--- a/pkgs/applications/misc/ape/apeclex.nix
+++ b/pkgs/applications/misc/ape/apeclex.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, attemptoClex, callPackage }:
+{ lib, attemptoClex, callPackage }:
 
 callPackage ./. {
   pname = "ape-clex";
diff --git a/pkgs/applications/misc/archivy/default.nix b/pkgs/applications/misc/archivy/default.nix
index c94011466ec3..4fa3d5cf4199 100644
--- a/pkgs/applications/misc/archivy/default.nix
+++ b/pkgs/applications/misc/archivy/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, python3, fetchPypi, appdirs, attrs, requests,
+{ lib, python3, fetchPypi, appdirs, attrs, requests,
 beautifulsoup4, click-plugins, elasticsearch, flask_login, flask_wtf,
 pypandoc, python-dotenv, python-frontmatter, tinydb, validators,
 watchdog, wtforms }:
diff --git a/pkgs/applications/misc/ausweisapp2/default.nix b/pkgs/applications/misc/ausweisapp2/default.nix
index 82e7c1bb21bc..bd3194e3fea2 100644
--- a/pkgs/applications/misc/ausweisapp2/default.nix
+++ b/pkgs/applications/misc/ausweisapp2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, cmake, pkg-config, pcsclite, qtsvg, qttools, qtwebsockets
+{ lib, mkDerivation, fetchFromGitHub, cmake, pkg-config, pcsclite, qtsvg, qttools, qtwebsockets
 , qtquickcontrols2, qtgraphicaleffects }:
 
 mkDerivation rec {
diff --git a/pkgs/applications/misc/autospotting/default.nix b/pkgs/applications/misc/autospotting/default.nix
index 0b57ad292661..ac929bfa5b15 100644
--- a/pkgs/applications/misc/autospotting/default.nix
+++ b/pkgs/applications/misc/autospotting/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage {
   pname = "autospotting";
diff --git a/pkgs/applications/misc/barrier/default.nix b/pkgs/applications/misc/barrier/default.nix
index fa5980b115ee..b9dbcf529be1 100644
--- a/pkgs/applications/misc/barrier/default.nix
+++ b/pkgs/applications/misc/barrier/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, cmake, curl, xorg, avahi, qtbase, mkDerivation,
+{ lib, fetchFromGitHub, cmake, curl, xorg, avahi, qtbase, mkDerivation,
   openssl, wrapGAppsHook,
   avahiWithLibdnssdCompat ? avahi.override { withLibdnssdCompat = true; }
 }:
diff --git a/pkgs/applications/misc/bibletime/default.nix b/pkgs/applications/misc/bibletime/default.nix
index 3213ed9edf0d..eb909155e4e1 100644
--- a/pkgs/applications/misc/bibletime/default.nix
+++ b/pkgs/applications/misc/bibletime/default.nix
@@ -1,4 +1,4 @@
-{ lib, mkDerivation, stdenv, fetchurl, cmake, pkg-config, sword, boost, clucene_core
+{ lib, mkDerivation, fetchurl, cmake, pkg-config, sword, boost, clucene_core
 , qtbase, qttools, qtsvg, qtwebkit
 }:
 
diff --git a/pkgs/applications/misc/bleachbit/default.nix b/pkgs/applications/misc/bleachbit/default.nix
index 89686e50d175..952d1fe16db6 100644
--- a/pkgs/applications/misc/bleachbit/default.nix
+++ b/pkgs/applications/misc/bleachbit/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , python3Packages
 , fetchurl
 , gettext
diff --git a/pkgs/applications/misc/break-time/default.nix b/pkgs/applications/misc/break-time/default.nix
index 05815e242f02..3458ac3f2507 100644
--- a/pkgs/applications/misc/break-time/default.nix
+++ b/pkgs/applications/misc/break-time/default.nix
@@ -5,7 +5,7 @@
 , pkg-config
 , python3
 , rustPlatform
-, lib, stdenv
+, lib
 , wrapGAppsHook
 }:
 
diff --git a/pkgs/applications/misc/buku/default.nix b/pkgs/applications/misc/buku/default.nix
index 772754ecc6d5..68b4f7b3e560 100644
--- a/pkgs/applications/misc/buku/default.nix
+++ b/pkgs/applications/misc/buku/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3, fetchFromGitHub }:
+{ lib, python3, fetchFromGitHub }:
 
 with python3.pkgs; buildPythonApplication rec {
   version = "4.5";
diff --git a/pkgs/applications/misc/candle/default.nix b/pkgs/applications/misc/candle/default.nix
index d3357b41bd2e..8df75b0cbd19 100644
--- a/pkgs/applications/misc/candle/default.nix
+++ b/pkgs/applications/misc/candle/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchFromGitHub, qtbase, qtserialport, qmake }:
+{ mkDerivation, lib, fetchFromGitHub, qtbase, qtserialport, qmake }:
 
 mkDerivation rec {
   pname = "candle";
diff --git a/pkgs/applications/misc/cheat/default.nix b/pkgs/applications/misc/cheat/default.nix
index 988af330deb5..90eb38329a32 100644
--- a/pkgs/applications/misc/cheat/default.nix
+++ b/pkgs/applications/misc/cheat/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub
+{ lib, fetchFromGitHub
 , buildGoModule, installShellFiles }:
 
 buildGoModule rec {
diff --git a/pkgs/applications/misc/chewing-editor/default.nix b/pkgs/applications/misc/chewing-editor/default.nix
index fb5d9aed9596..13ee17999fe1 100644
--- a/pkgs/applications/misc/chewing-editor/default.nix
+++ b/pkgs/applications/misc/chewing-editor/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, cmake, pkg-config, libchewing, qtbase
+{ lib, mkDerivation, fetchFromGitHub, cmake, pkg-config, libchewing, qtbase
 , qttools }:
 
 mkDerivation rec {
diff --git a/pkgs/applications/misc/coursera-dl/default.nix b/pkgs/applications/misc/coursera-dl/default.nix
index 631d53b506fc..56938f5338dc 100644
--- a/pkgs/applications/misc/coursera-dl/default.nix
+++ b/pkgs/applications/misc/coursera-dl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, glibcLocales, pandoc, python3 }:
+{ lib, fetchFromGitHub, glibcLocales, pandoc, python3 }:
 
 let
   pythonPackages = python3.pkgs;
diff --git a/pkgs/applications/misc/crow-translate/default.nix b/pkgs/applications/misc/crow-translate/default.nix
index 7b9d7faba940..8cb87274c1dc 100644
--- a/pkgs/applications/misc/crow-translate/default.nix
+++ b/pkgs/applications/misc/crow-translate/default.nix
@@ -1,5 +1,5 @@
 { lib
-, stdenv
+
 , mkDerivation
 , fetchFromGitHub
 , substituteAll
diff --git a/pkgs/applications/misc/cum/default.nix b/pkgs/applications/misc/cum/default.nix
index 6b851e80f346..42df68f6721a 100644
--- a/pkgs/applications/misc/cum/default.nix
+++ b/pkgs/applications/misc/cum/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages }:
+{ lib, python3Packages }:
 
 with python3Packages;
 
diff --git a/pkgs/applications/misc/cura/lulzbot/libarcus.nix b/pkgs/applications/misc/cura/lulzbot/libarcus.nix
index 1e186bdf5fd2..7b1dbf4d85ef 100644
--- a/pkgs/applications/misc/cura/lulzbot/libarcus.nix
+++ b/pkgs/applications/misc/cura/lulzbot/libarcus.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchgit, fetchurl, cmake, sip, protobuf, pythonOlder }:
+{ lib, buildPythonPackage, fetchgit, fetchurl, cmake, sip, protobuf, pythonOlder }:
 
 buildPythonPackage {
   pname = "libarcus";
diff --git a/pkgs/applications/misc/cura/lulzbot/libsavitar.nix b/pkgs/applications/misc/cura/lulzbot/libsavitar.nix
index fb920235031f..f12059e6317b 100644
--- a/pkgs/applications/misc/cura/lulzbot/libsavitar.nix
+++ b/pkgs/applications/misc/cura/lulzbot/libsavitar.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, pythonOlder, fetchgit, cmake, sip }:
+{ lib, buildPythonPackage, pythonOlder, fetchgit, cmake, sip }:
 
 buildPythonPackage {
   pname = "libsavitar-lulzbot";
diff --git a/pkgs/applications/misc/cura/lulzbot/uranium.nix b/pkgs/applications/misc/cura/lulzbot/uranium.nix
index 77a4f3edef65..01166092b2b5 100644
--- a/pkgs/applications/misc/cura/lulzbot/uranium.nix
+++ b/pkgs/applications/misc/cura/lulzbot/uranium.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, callPackage, fetchurl, fetchgit, buildPythonPackage, fetchFromGitHub, python, cmake
+{ lib, callPackage, fetchurl, fetchgit, buildPythonPackage, fetchFromGitHub, python, cmake
 , pyqt5, numpy, scipy, shapely, libarcusLulzbot, doxygen, gettext, pythonOlder }:
 
 buildPythonPackage {
diff --git a/pkgs/applications/misc/dasel/default.nix b/pkgs/applications/misc/dasel/default.nix
index 3a46b5e2f9a6..207423113757 100644
--- a/pkgs/applications/misc/dasel/default.nix
+++ b/pkgs/applications/misc/dasel/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildGoModule
 , fetchFromGitHub
 }:
diff --git a/pkgs/applications/misc/devdocs-desktop/default.nix b/pkgs/applications/misc/devdocs-desktop/default.nix
index 3425ceb44a93..fe15d90f254c 100644
--- a/pkgs/applications/misc/devdocs-desktop/default.nix
+++ b/pkgs/applications/misc/devdocs-desktop/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appimageTools, fetchurl, gsettings-desktop-schemas, gtk3 }:
+{ lib, appimageTools, fetchurl, gsettings-desktop-schemas, gtk3 }:
 
 let
   version = "0.7.1";
diff --git a/pkgs/applications/misc/dfilemanager/default.nix b/pkgs/applications/misc/dfilemanager/default.nix
index 6af92285c2b0..19cfa95a88e4 100644
--- a/pkgs/applications/misc/dfilemanager/default.nix
+++ b/pkgs/applications/misc/dfilemanager/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, cmake, file, qtbase, qttools, solid }:
+{ lib, mkDerivation, fetchFromGitHub, cmake, file, qtbase, qttools, solid }:
 
 mkDerivation {
   pname = "dfilemanager";
diff --git a/pkgs/applications/misc/diffpdf/default.nix b/pkgs/applications/misc/diffpdf/default.nix
index c1a4d5e44405..30715dd51f35 100644
--- a/pkgs/applications/misc/diffpdf/default.nix
+++ b/pkgs/applications/misc/diffpdf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchurl, fetchpatch, qmake, qttools, qtbase, poppler }:
+{ lib, mkDerivation, fetchurl, fetchpatch, qmake, qttools, qtbase, poppler }:
 
 mkDerivation rec {
   version = "2.1.3";
diff --git a/pkgs/applications/misc/dmensamenu/default.nix b/pkgs/applications/misc/dmensamenu/default.nix
index a0b4237c7f67..a8817a542e31 100644
--- a/pkgs/applications/misc/dmensamenu/default.nix
+++ b/pkgs/applications/misc/dmensamenu/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonApplication, fetchFromGitHub, substituteAll, requests, dmenu }:
+{ lib, buildPythonApplication, fetchFromGitHub, substituteAll, requests, dmenu }:
 
 buildPythonApplication rec {
   pname = "dmensamenu";
diff --git a/pkgs/applications/misc/dockbarx/default.nix b/pkgs/applications/misc/dockbarx/default.nix
index e0e9fcd6febf..b31c17cc319a 100644
--- a/pkgs/applications/misc/dockbarx/default.nix
+++ b/pkgs/applications/misc/dockbarx/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, pythonPackages, gnome2, keybinder }:
+{ lib, fetchFromGitHub, pythonPackages, gnome2, keybinder }:
 
 pythonPackages.buildPythonApplication rec {
   ver = "0.93";
diff --git a/pkgs/applications/misc/dotfiles/default.nix b/pkgs/applications/misc/dotfiles/default.nix
index 913ed9523baa..911a319a963f 100644
--- a/pkgs/applications/misc/dotfiles/default.nix
+++ b/pkgs/applications/misc/dotfiles/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, pythonPackages }:
+{ lib, pythonPackages }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "dotfiles";
diff --git a/pkgs/applications/misc/dstask/default.nix b/pkgs/applications/misc/dstask/default.nix
index 78efa133c1e4..cd1c659ec5bc 100644
--- a/pkgs/applications/misc/dstask/default.nix
+++ b/pkgs/applications/misc/dstask/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "dstask";
diff --git a/pkgs/applications/misc/dupeguru/default.nix b/pkgs/applications/misc/dupeguru/default.nix
index 418658fec228..d2332b4d9c7d 100644
--- a/pkgs/applications/misc/dupeguru/default.nix
+++ b/pkgs/applications/misc/dupeguru/default.nix
@@ -1,4 +1,4 @@
-{lib, stdenv, python3Packages, fetchpatch, gettext, qt5, fetchFromGitHub}:
+{lib, python3Packages, fetchpatch, gettext, qt5, fetchFromGitHub}:
 
 python3Packages.buildPythonApplication rec {
   pname = "dupeguru";
diff --git a/pkgs/applications/misc/electrum/dash.nix b/pkgs/applications/misc/electrum/dash.nix
index 29ac8b4484b5..d0606001ad43 100644
--- a/pkgs/applications/misc/electrum/dash.nix
+++ b/pkgs/applications/misc/electrum/dash.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, python2Packages }:
+{ lib, fetchurl, python2Packages }:
 
 python2Packages.buildPythonApplication rec {
   version = "2.9.3.1";
diff --git a/pkgs/applications/misc/electrum/ltc.nix b/pkgs/applications/misc/electrum/ltc.nix
index ad6ed6f7a783..bd015afdc572 100644
--- a/pkgs/applications/misc/electrum/ltc.nix
+++ b/pkgs/applications/misc/electrum/ltc.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchurl
 , python3Packages
 , wrapQtAppsHook
diff --git a/pkgs/applications/misc/elfx86exts/default.nix b/pkgs/applications/misc/elfx86exts/default.nix
index 8fc7fb32743d..690b88d8417e 100644
--- a/pkgs/applications/misc/elfx86exts/default.nix
+++ b/pkgs/applications/misc/elfx86exts/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , rustPlatform
 , fetchFromGitHub
 }:
diff --git a/pkgs/applications/misc/exercism/default.nix b/pkgs/applications/misc/exercism/default.nix
index 1eeeba1b4391..79420eacec82 100644
--- a/pkgs/applications/misc/exercism/default.nix
+++ b/pkgs/applications/misc/exercism/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "exercism";
diff --git a/pkgs/applications/misc/expenses/default.nix b/pkgs/applications/misc/expenses/default.nix
index 7f932b5b1e56..63f942c2c593 100644
--- a/pkgs/applications/misc/expenses/default.nix
+++ b/pkgs/applications/misc/expenses/default.nix
@@ -1,5 +1,5 @@
 { lib
-, stdenv
+
 , buildGoModule
 , fetchFromGitHub
 , sqlite
diff --git a/pkgs/applications/misc/fbmenugen/default.nix b/pkgs/applications/misc/fbmenugen/default.nix
index 26b8beab19cd..36629179ab58 100644
--- a/pkgs/applications/misc/fbmenugen/default.nix
+++ b/pkgs/applications/misc/fbmenugen/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , fluxbox
 , gnused
diff --git a/pkgs/applications/misc/geoipupdate/default.nix b/pkgs/applications/misc/geoipupdate/default.nix
index 1e0aba0400f0..12b5a38877ac 100644
--- a/pkgs/applications/misc/geoipupdate/default.nix
+++ b/pkgs/applications/misc/geoipupdate/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "geoipupdate";
diff --git a/pkgs/applications/misc/get_iplayer/default.nix b/pkgs/applications/misc/get_iplayer/default.nix
index 6664974a41ad..d4f50451719b 100644
--- a/pkgs/applications/misc/get_iplayer/default.nix
+++ b/pkgs/applications/misc/get_iplayer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, atomicparsley, flvstreamer, ffmpeg_3, makeWrapper, perl, perlPackages, rtmpdump}:
+{ lib, fetchFromGitHub, atomicparsley, flvstreamer, ffmpeg_3, makeWrapper, perl, perlPackages, rtmpdump}:
 
 with lib;
 
diff --git a/pkgs/applications/misc/go-jira/default.nix b/pkgs/applications/misc/go-jira/default.nix
index c2871766debb..2f2a0a22126e 100644
--- a/pkgs/applications/misc/go-jira/default.nix
+++ b/pkgs/applications/misc/go-jira/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "go-jira";
diff --git a/pkgs/applications/misc/golden-cheetah/default.nix b/pkgs/applications/misc/golden-cheetah/default.nix
index 57e2d95f0430..fa58c2d3965a 100644
--- a/pkgs/applications/misc/golden-cheetah/default.nix
+++ b/pkgs/applications/misc/golden-cheetah/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, fetchpatch, mkDerivation
+{ lib, fetchFromGitHub, fetchpatch, mkDerivation
 , qtbase, qtsvg, qtserialport, qtwebengine, qtmultimedia, qttools
 , qtconnectivity, qtcharts, libusb-compat-0_1
 , yacc, flex, zlib, qmake, makeDesktopItem, makeWrapper
diff --git a/pkgs/applications/misc/gpsbabel/gui.nix b/pkgs/applications/misc/gpsbabel/gui.nix
index 3de63203f24c..4025b313128b 100644
--- a/pkgs/applications/misc/gpsbabel/gui.nix
+++ b/pkgs/applications/misc/gpsbabel/gui.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, qmake, qttools, qtwebkit, qttranslations, gpsbabel }:
+{ lib, mkDerivation, qmake, qttools, qtwebkit, qttranslations, gpsbabel }:
 
 mkDerivation {
   pname = "gpsbabel-gui";
diff --git a/pkgs/applications/misc/gramps/default.nix b/pkgs/applications/misc/gramps/default.nix
index 4fc4586ca4e3..1628f0473fa6 100644
--- a/pkgs/applications/misc/gramps/default.nix
+++ b/pkgs/applications/misc/gramps/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, gtk3, pythonPackages, intltool, gexiv2,
+{ lib, fetchFromGitHub, gtk3, pythonPackages, intltool, gexiv2,
   pango, gobject-introspection, wrapGAppsHook, gettext,
 # Optional packages:
  enableOSM ? true, osm-gps-map,
diff --git a/pkgs/applications/misc/gsctl/default.nix b/pkgs/applications/misc/gsctl/default.nix
index 101baa093966..15d8b9663960 100644
--- a/pkgs/applications/misc/gsctl/default.nix
+++ b/pkgs/applications/misc/gsctl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "gsctl";
diff --git a/pkgs/applications/misc/hamster/default.nix b/pkgs/applications/misc/hamster/default.nix
index 855123ef7931..dbf7e1aee746 100644
--- a/pkgs/applications/misc/hamster/default.nix
+++ b/pkgs/applications/misc/hamster/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages, intltool, glib, itstool
+{ lib, fetchFromGitHub, python3Packages, intltool, glib, itstool
 , wrapGAppsHook, gobject-introspection, pango, gdk-pixbuf, atk, wafHook }:
 
 python3Packages.buildPythonApplication rec {
diff --git a/pkgs/applications/misc/haxor-news/default.nix b/pkgs/applications/misc/haxor-news/default.nix
index 467cbfad6568..fc9607e7be6b 100644
--- a/pkgs/applications/misc/haxor-news/default.nix
+++ b/pkgs/applications/misc/haxor-news/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3, fetchpatch }:
+{ lib, fetchFromGitHub, python3, fetchpatch }:
 
 
 let
diff --git a/pkgs/applications/misc/hivemind/default.nix b/pkgs/applications/misc/hivemind/default.nix
index fc22d3a854a6..6ada1fd749bd 100644
--- a/pkgs/applications/misc/hivemind/default.nix
+++ b/pkgs/applications/misc/hivemind/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, runtimeShell }:
+{ lib, buildGoPackage, fetchFromGitHub, runtimeShell }:
 
 buildGoPackage rec {
   pname = "hivemind";
diff --git a/pkgs/applications/misc/hugo/default.nix b/pkgs/applications/misc/hugo/default.nix
index 2d2ccefe934e..35246a45da27 100644
--- a/pkgs/applications/misc/hugo/default.nix
+++ b/pkgs/applications/misc/hugo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "hugo";
diff --git a/pkgs/applications/misc/jrnl/default.nix b/pkgs/applications/misc/jrnl/default.nix
index 7fc8ef88330f..79f87612e49a 100644
--- a/pkgs/applications/misc/jrnl/default.nix
+++ b/pkgs/applications/misc/jrnl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , python3
 }:
 
diff --git a/pkgs/applications/misc/k4dirstat/default.nix b/pkgs/applications/misc/k4dirstat/default.nix
index 341341c3ca88..467945af6ac8 100644
--- a/pkgs/applications/misc/k4dirstat/default.nix
+++ b/pkgs/applications/misc/k4dirstat/default.nix
@@ -6,7 +6,7 @@
 , kio
 , kjobwidgets
 , kxmlgui
-, lib, stdenv
+, lib
 }:
 
 mkDerivation rec {
diff --git a/pkgs/applications/misc/keepass/default.nix b/pkgs/applications/misc/keepass/default.nix
index c1d9448c6a6d..59d986321dd3 100644
--- a/pkgs/applications/misc/keepass/default.nix
+++ b/pkgs/applications/misc/keepass/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchurl, buildDotnetPackage, substituteAll, makeWrapper, makeDesktopItem,
+{ lib, fetchurl, buildDotnetPackage, substituteAll, makeWrapper, makeDesktopItem,
   unzip, icoutils, gtk2, xorg, xdotool, xsel, coreutils, unixtools, glib, plugins ? [] }:
 
 with builtins; buildDotnetPackage rec {
diff --git a/pkgs/applications/misc/khard/default.nix b/pkgs/applications/misc/khard/default.nix
index 5effc88acb00..3bec8db06874 100644
--- a/pkgs/applications/misc/khard/default.nix
+++ b/pkgs/applications/misc/khard/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, glibcLocales, python3 }:
+{ lib, glibcLocales, python3 }:
 
 python3.pkgs.buildPythonApplication rec {
   version = "0.17.0";
diff --git a/pkgs/applications/misc/kondo/default.nix b/pkgs/applications/misc/kondo/default.nix
index 545dc85efebf..dcbeb4087599 100644
--- a/pkgs/applications/misc/kondo/default.nix
+++ b/pkgs/applications/misc/kondo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, rustPlatform, fetchFromGitHub }:
+{ lib, rustPlatform, fetchFromGitHub }:
 
 rustPlatform.buildRustPackage rec {
   pname = "kondo";
diff --git a/pkgs/applications/misc/kupfer/default.nix b/pkgs/applications/misc/kupfer/default.nix
index ce21ea75b307..243583b87627 100644
--- a/pkgs/applications/misc/kupfer/default.nix
+++ b/pkgs/applications/misc/kupfer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchurl
 , intltool
 , python3Packages
diff --git a/pkgs/applications/misc/loxodo/default.nix b/pkgs/applications/misc/loxodo/default.nix
index e32535d4445e..65f9a9f0f17e 100644
--- a/pkgs/applications/misc/loxodo/default.nix
+++ b/pkgs/applications/misc/loxodo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python27Packages, fetchgit }:
+{ lib, python27Packages, fetchgit }:
 let
   py = python27Packages;
   python = py.python;
diff --git a/pkgs/applications/misc/madonctl/default.nix b/pkgs/applications/misc/madonctl/default.nix
index 249ed48bd1c4..2a65fc25af2f 100644
--- a/pkgs/applications/misc/madonctl/default.nix
+++ b/pkgs/applications/misc/madonctl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "madonctl";
diff --git a/pkgs/applications/misc/mediaelch/default.nix b/pkgs/applications/misc/mediaelch/default.nix
index f19cbee8b79f..4adfe0f65262 100644
--- a/pkgs/applications/misc/mediaelch/default.nix
+++ b/pkgs/applications/misc/mediaelch/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , mkDerivation
 , fetchFromGitHub
 , qmake
diff --git a/pkgs/applications/misc/menumaker/default.nix b/pkgs/applications/misc/menumaker/default.nix
index 192228de5d91..086db35a5ad5 100644
--- a/pkgs/applications/misc/menumaker/default.nix
+++ b/pkgs/applications/misc/menumaker/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, pythonPackages }:
+{ lib, fetchurl, pythonPackages }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "menumaker";
diff --git a/pkgs/applications/misc/mop/default.nix b/pkgs/applications/misc/mop/default.nix
index 07102fe56f23..007965f868b1 100644
--- a/pkgs/applications/misc/mop/default.nix
+++ b/pkgs/applications/misc/mop/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   pname = "mop";
diff --git a/pkgs/applications/misc/mqtt-bench/default.nix b/pkgs/applications/misc/mqtt-bench/default.nix
index c01a1b9cbc69..657ac9645deb 100644
--- a/pkgs/applications/misc/mqtt-bench/default.nix
+++ b/pkgs/applications/misc/mqtt-bench/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, fetchpatch }:
+{ lib, buildGoPackage, fetchFromGitHub, fetchpatch }:
 
 buildGoPackage rec {
   pname = "mqtt-bench";
diff --git a/pkgs/applications/misc/multibootusb/default.nix b/pkgs/applications/misc/multibootusb/default.nix
index 173291183dab..fd1ca6665892 100644
--- a/pkgs/applications/misc/multibootusb/default.nix
+++ b/pkgs/applications/misc/multibootusb/default.nix
@@ -1,6 +1,6 @@
 { fetchFromGitHub, libxcb, mtools, p7zip, parted, procps, qemu, unzip, zip,
   coreutils, gnugrep, which, gnused, e2fsprogs, autoPatchelfHook, gptfdisk,
-  python36Packages, qt5, runtimeShell, lib, stdenv, util-linux, wrapQtAppsHook }:
+  python36Packages, qt5, runtimeShell, lib, util-linux, wrapQtAppsHook }:
 
 # Note: Multibootusb is tricky to maintain. It relies on the
 # $PYTHONPATH variable containing some of their code, so that
diff --git a/pkgs/applications/misc/nixnote2/default.nix b/pkgs/applications/misc/nixnote2/default.nix
index b23c41e6feec..cbb7a110c4c2 100644
--- a/pkgs/applications/misc/nixnote2/default.nix
+++ b/pkgs/applications/misc/nixnote2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, boost
+{ lib, mkDerivation, fetchFromGitHub, boost
 , qtbase, qtwebkit, poppler, qmake, hunspell, html-tidy}:
 
 mkDerivation rec {
diff --git a/pkgs/applications/misc/ocropus/default.nix b/pkgs/applications/misc/ocropus/default.nix
index 2b0986eeba66..507399c012bb 100644
--- a/pkgs/applications/misc/ocropus/default.nix
+++ b/pkgs/applications/misc/ocropus/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, fetchurl, pythonPackages, curl }:
+{ lib, fetchFromGitHub, fetchurl, pythonPackages, curl }:
 
 let
   getmodel = name: sha256: {
diff --git a/pkgs/applications/misc/onboard/default.nix b/pkgs/applications/misc/onboard/default.nix
index 42433936aba4..d52120e0fb7d 100644
--- a/pkgs/applications/misc/onboard/default.nix
+++ b/pkgs/applications/misc/onboard/default.nix
@@ -1,5 +1,5 @@
 { fetchurl
-, lib, stdenv
+, lib
 , substituteAll
 , aspellWithDicts
 , at-spi2-core ? null
diff --git a/pkgs/applications/misc/opentx/default.nix b/pkgs/applications/misc/opentx/default.nix
index bb8f8d4013f1..2ca4e3203ac1 100644
--- a/pkgs/applications/misc/opentx/default.nix
+++ b/pkgs/applications/misc/opentx/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub
+{ lib, mkDerivation, fetchFromGitHub
 , cmake, gcc-arm-embedded, python3Packages
 , qtbase, qtmultimedia, qttranslations, SDL, gtest
 , dfu-util, avrdude
diff --git a/pkgs/applications/misc/orca/default.nix b/pkgs/applications/misc/orca/default.nix
index 25cca1536f8d..72d68431b8c0 100644
--- a/pkgs/applications/misc/orca/default.nix
+++ b/pkgs/applications/misc/orca/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , pkg-config
 , fetchurl
 , buildPythonApplication
diff --git a/pkgs/applications/misc/pass-secret-service/default.nix b/pkgs/applications/misc/pass-secret-service/default.nix
index f2386a5cd83b..932fa588d271 100644
--- a/pkgs/applications/misc/pass-secret-service/default.nix
+++ b/pkgs/applications/misc/pass-secret-service/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3, dbus, gnupg }:
+{ lib, fetchFromGitHub, python3, dbus, gnupg }:
 
 python3.pkgs.buildPythonApplication rec {
   pname = "pass-secret-service";
diff --git a/pkgs/applications/misc/pdf-quench/default.nix b/pkgs/applications/misc/pdf-quench/default.nix
index 907cceeb58b7..4255127b3dfe 100644
--- a/pkgs/applications/misc/pdf-quench/default.nix
+++ b/pkgs/applications/misc/pdf-quench/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, pkgs, python3, wrapGAppsHook}:
+{ lib, fetchFromGitHub, pkgs, python3, wrapGAppsHook}:
 
 python3.pkgs.buildPythonApplication {
   pname = "pdf-quench";
diff --git a/pkgs/applications/misc/pdfarranger/default.nix b/pkgs/applications/misc/pdfarranger/default.nix
index 8c8413b2ce60..73dd9390382e 100644
--- a/pkgs/applications/misc/pdfarranger/default.nix
+++ b/pkgs/applications/misc/pdfarranger/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, lib
+{ fetchFromGitHub, lib
 , wrapGAppsHook, intltool
 , python3Packages, gtk3, poppler_gi
 }:
diff --git a/pkgs/applications/misc/pdfdiff/default.nix b/pkgs/applications/misc/pdfdiff/default.nix
index 31719cdfef2b..5e489bebb25a 100644
--- a/pkgs/applications/misc/pdfdiff/default.nix
+++ b/pkgs/applications/misc/pdfdiff/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, pythonPackages, fetchurl, xpdf }:
+{ lib, pythonPackages, fetchurl, xpdf }:
 let
   py = pythonPackages;
 in
diff --git a/pkgs/applications/misc/pgmodeler/default.nix b/pkgs/applications/misc/pgmodeler/default.nix
index 67010e713c3c..0a99d357e68f 100644
--- a/pkgs/applications/misc/pgmodeler/default.nix
+++ b/pkgs/applications/misc/pgmodeler/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , fetchFromGitHub
 , pkg-config
 , qmake
diff --git a/pkgs/applications/misc/pipr/default.nix b/pkgs/applications/misc/pipr/default.nix
index 7332f2016894..6ca315b1092a 100644
--- a/pkgs/applications/misc/pipr/default.nix
+++ b/pkgs/applications/misc/pipr/default.nix
@@ -1,9 +1,8 @@
-{ stdenv
+{ lib
 , fetchFromGitHub
 , rustPlatform
 , bubblewrap
 , makeWrapper
-, lib
 }:
 
 rustPlatform.buildRustPackage rec {
diff --git a/pkgs/applications/misc/plover/default.nix b/pkgs/applications/misc/plover/default.nix
index 2a3368e351f7..05886a85bf0c 100644
--- a/pkgs/applications/misc/plover/default.nix
+++ b/pkgs/applications/misc/plover/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, python27Packages, python36Packages, wmctrl,
+{ lib, fetchurl, python27Packages, python36Packages, wmctrl,
   qtbase, mkDerivationWith }:
 
 {
diff --git a/pkgs/applications/misc/prevo/default.nix b/pkgs/applications/misc/prevo/default.nix
index 92d788695035..45f5889d4d5d 100644
--- a/pkgs/applications/misc/prevo/default.nix
+++ b/pkgs/applications/misc/prevo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, symlinkJoin, prevo-tools, prevo-data, makeWrapper }:
+{ lib, symlinkJoin, prevo-tools, prevo-data, makeWrapper }:
 
 symlinkJoin rec {
   name = "prevo-${version}";
diff --git a/pkgs/applications/misc/printrun/default.nix b/pkgs/applications/misc/printrun/default.nix
index 13f9178f330c..631609551306 100644
--- a/pkgs/applications/misc/printrun/default.nix
+++ b/pkgs/applications/misc/printrun/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, fetchFromGitHub }:
+{ lib, python3Packages, fetchFromGitHub }:
 
 python3Packages.buildPythonApplication rec {
   pname = "printrun";
diff --git a/pkgs/applications/misc/pydf/default.nix b/pkgs/applications/misc/pydf/default.nix
index 0135e10d6df1..afec377e9b66 100644
--- a/pkgs/applications/misc/pydf/default.nix
+++ b/pkgs/applications/misc/pydf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages }:
+{ lib, python3Packages }:
 
 python3Packages.buildPythonPackage rec {
   pname = "pydf";
diff --git a/pkgs/applications/misc/pyditz/cerberus.nix b/pkgs/applications/misc/pyditz/cerberus.nix
index a26b6b014da4..5eb43c0e3575 100644
--- a/pkgs/applications/misc/pyditz/cerberus.nix
+++ b/pkgs/applications/misc/pyditz/cerberus.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytestrunner, pytest }:
+{ lib, buildPythonPackage, fetchPypi, pytestrunner, pytest }:
 
 buildPythonPackage rec {
   pname = "Cerberus";
diff --git a/pkgs/applications/misc/pyditz/default.nix b/pkgs/applications/misc/pyditz/default.nix
index 268d2fb28609..5765aeba7dd0 100644
--- a/pkgs/applications/misc/pyditz/default.nix
+++ b/pkgs/applications/misc/pyditz/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, pythonPackages }:
+{ lib, pythonPackages }:
 
 with pythonPackages;
 
diff --git a/pkgs/applications/misc/pytrainer/default.nix b/pkgs/applications/misc/pytrainer/default.nix
index eb775a1f6024..4e1e1f31f198 100644
--- a/pkgs/applications/misc/pytrainer/default.nix
+++ b/pkgs/applications/misc/pytrainer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , perl
 , python3
diff --git a/pkgs/applications/misc/qdirstat/default.nix b/pkgs/applications/misc/qdirstat/default.nix
index a51bd3a80c05..7830f2035d9c 100644
--- a/pkgs/applications/misc/qdirstat/default.nix
+++ b/pkgs/applications/misc/qdirstat/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, qmake
+{ lib, fetchFromGitHub, qmake
 , coreutils, xdg_utils, bash
 , makeWrapper, perlPackages, mkDerivation }:
 
diff --git a/pkgs/applications/misc/qlcplus/default.nix b/pkgs/applications/misc/qlcplus/default.nix
index c6306294ecdd..721c95c028bc 100644
--- a/pkgs/applications/misc/qlcplus/default.nix
+++ b/pkgs/applications/misc/qlcplus/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, qmake, pkg-config, udev
+{ lib, mkDerivation, fetchFromGitHub, qmake, pkg-config, udev
 , qtmultimedia, qtscript, alsaLib, ola, libftdi1, libusb-compat-0_1
 , libsndfile, libmad
 }:
diff --git a/pkgs/applications/misc/qpdfview/default.nix b/pkgs/applications/misc/qpdfview/default.nix
index 0892632c1d84..6ae81fca27cf 100644
--- a/pkgs/applications/misc/qpdfview/default.nix
+++ b/pkgs/applications/misc/qpdfview/default.nix
@@ -1,4 +1,4 @@
-{lib, stdenv, mkDerivation, fetchurl, qmake, qtbase, qtsvg, pkg-config, poppler, djvulibre, libspectre, cups
+{lib, mkDerivation, fetchurl, qmake, qtbase, qtsvg, pkg-config, poppler, djvulibre, libspectre, cups
 , file, ghostscript
 }:
 let
diff --git a/pkgs/applications/misc/qsudo/default.nix b/pkgs/applications/misc/qsudo/default.nix
index f7dbc9a90581..5f9958f2d5d6 100644
--- a/pkgs/applications/misc/qsudo/default.nix
+++ b/pkgs/applications/misc/qsudo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , mkDerivation
 , fetchFromGitHub
 , qmake
diff --git a/pkgs/applications/misc/qt-box-editor/default.nix b/pkgs/applications/misc/qt-box-editor/default.nix
index 5de2428250a0..9480a32aae3d 100644
--- a/pkgs/applications/misc/qt-box-editor/default.nix
+++ b/pkgs/applications/misc/qt-box-editor/default.nix
@@ -1,5 +1,5 @@
 { mkDerivation
-, lib, stdenv
+, lib
 , fetchFromGitHub
 , qtbase
 , qtsvg
diff --git a/pkgs/applications/misc/qtbitcointrader/default.nix b/pkgs/applications/misc/qtbitcointrader/default.nix
index 4ab70a5a8d7d..fafd91f7811c 100644
--- a/pkgs/applications/misc/qtbitcointrader/default.nix
+++ b/pkgs/applications/misc/qtbitcointrader/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchzip, qt5, mkDerivation }:
+{ lib, fetchzip, qt5, mkDerivation }:
 
 let
   version = "1.40.43";
diff --git a/pkgs/applications/misc/ranger/default.nix b/pkgs/applications/misc/ranger/default.nix
index 8394fd4c5343..619b2ba99551 100644
--- a/pkgs/applications/misc/ranger/default.nix
+++ b/pkgs/applications/misc/ranger/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, python3Packages, file, less, highlight
+{ lib, fetchFromGitHub, python3Packages, file, less, highlight
 , imagePreviewSupport ? true, w3m ? null}:
 
 with lib;
diff --git a/pkgs/applications/misc/remarkable/remarkable-mouse/default.nix b/pkgs/applications/misc/remarkable/remarkable-mouse/default.nix
index 77538f243614..800170b314a5 100644
--- a/pkgs/applications/misc/remarkable/remarkable-mouse/default.nix
+++ b/pkgs/applications/misc/remarkable/remarkable-mouse/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonApplication, fetchPypi, python3Packages }:
+{ lib, buildPythonApplication, fetchPypi, python3Packages }:
 
 buildPythonApplication rec {
   pname = "remarkable-mouse";
diff --git a/pkgs/applications/misc/remarkable/rmapi/default.nix b/pkgs/applications/misc/remarkable/rmapi/default.nix
index 22a154da4fd0..e2a5f348da57 100644
--- a/pkgs/applications/misc/remarkable/rmapi/default.nix
+++ b/pkgs/applications/misc/remarkable/rmapi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "rmapi";
diff --git a/pkgs/applications/misc/remarkable/rmview/default.nix b/pkgs/applications/misc/remarkable/rmview/default.nix
index 3148bf0ccf39..385607ec7098 100644
--- a/pkgs/applications/misc/remarkable/rmview/default.nix
+++ b/pkgs/applications/misc/remarkable/rmview/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, python3Packages, wrapQtAppsHook }:
+{ lib, fetchFromGitHub, python3Packages, wrapQtAppsHook }:
 
 python3Packages.buildPythonApplication rec {
   pname = "rmview";
diff --git a/pkgs/applications/misc/rsclock/default.nix b/pkgs/applications/misc/rsclock/default.nix
index d7b38e2d665d..bc36b2f379e8 100644
--- a/pkgs/applications/misc/rsclock/default.nix
+++ b/pkgs/applications/misc/rsclock/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, rustPlatform, fetchFromGitHub }:
+{ lib, rustPlatform, fetchFromGitHub }:
 
 rustPlatform.buildRustPackage rec {
   pname = "rsClock";
diff --git a/pkgs/applications/misc/rss-bridge-cli/default.nix b/pkgs/applications/misc/rss-bridge-cli/default.nix
index 4ab79440b239..7550e6bcb95f 100644
--- a/pkgs/applications/misc/rss-bridge-cli/default.nix
+++ b/pkgs/applications/misc/rss-bridge-cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, writeShellScriptBin, rss-bridge, php }:
+{ lib, writeShellScriptBin, rss-bridge, php }:
 
 let
   phpWithExts = (php.withExtensions
diff --git a/pkgs/applications/misc/rtv/default.nix b/pkgs/applications/misc/rtv/default.nix
index 343936962329..be539a37a301 100644
--- a/pkgs/applications/misc/rtv/default.nix
+++ b/pkgs/applications/misc/rtv/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 with python3Packages;
 buildPythonApplication rec {
diff --git a/pkgs/applications/misc/snapper-gui/default.nix b/pkgs/applications/misc/snapper-gui/default.nix
index e41860551fcd..5beacfad2f95 100644
--- a/pkgs/applications/misc/snapper-gui/default.nix
+++ b/pkgs/applications/misc/snapper-gui/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3, python3Packages
+{ lib, fetchFromGitHub, python3, python3Packages
 , gnome3, gtk3, wrapGAppsHook, gtksourceview3, snapper
 , gobject-introspection
 }:
diff --git a/pkgs/applications/misc/syncthing-tray/default.nix b/pkgs/applications/misc/syncthing-tray/default.nix
index 15ef1654e70e..db734bff5878 100644
--- a/pkgs/applications/misc/syncthing-tray/default.nix
+++ b/pkgs/applications/misc/syncthing-tray/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoPackage, pkg-config, libappindicator-gtk3 }:
+{ lib, fetchFromGitHub, buildGoPackage, pkg-config, libappindicator-gtk3 }:
 
 buildGoPackage rec {
   pname = "syncthing-tray";
diff --git a/pkgs/applications/misc/taskwarrior-tui/default.nix b/pkgs/applications/misc/taskwarrior-tui/default.nix
index ae730d597ce7..1a97f6c0feb1 100644
--- a/pkgs/applications/misc/taskwarrior-tui/default.nix
+++ b/pkgs/applications/misc/taskwarrior-tui/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , rustPlatform
 , fetchFromGitHub
 }:
diff --git a/pkgs/applications/misc/termdown/default.nix b/pkgs/applications/misc/termdown/default.nix
index d8bb03138f32..562a0f0bdcbe 100644
--- a/pkgs/applications/misc/termdown/default.nix
+++ b/pkgs/applications/misc/termdown/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , buildPythonApplication
 , click
diff --git a/pkgs/applications/misc/terminal-parrot/default.nix b/pkgs/applications/misc/terminal-parrot/default.nix
index e3e64cfd68af..b44b4bd0a703 100644
--- a/pkgs/applications/misc/terminal-parrot/default.nix
+++ b/pkgs/applications/misc/terminal-parrot/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "terminal-parrot";
diff --git a/pkgs/applications/misc/termpdf.py/default.nix b/pkgs/applications/misc/termpdf.py/default.nix
index 2541a17fc201..95937ea5f2e3 100644
--- a/pkgs/applications/misc/termpdf.py/default.nix
+++ b/pkgs/applications/misc/termpdf.py/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonApplication
 , fetchFromGitHub
 , fetchPypi
diff --git a/pkgs/applications/misc/tickrs/default.nix b/pkgs/applications/misc/tickrs/default.nix
index ced50748d0f7..856fa60d8e63 100644
--- a/pkgs/applications/misc/tickrs/default.nix
+++ b/pkgs/applications/misc/tickrs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, rustPlatform, fetchFromGitHub, perl }:
+{ lib, rustPlatform, fetchFromGitHub, perl }:
 
 rustPlatform.buildRustPackage rec {
   pname = "tickrs";
diff --git a/pkgs/applications/misc/tipp10/default.nix b/pkgs/applications/misc/tipp10/default.nix
index 0658b43626ed..3333760a759a 100644
--- a/pkgs/applications/misc/tipp10/default.nix
+++ b/pkgs/applications/misc/tipp10/default.nix
@@ -1,4 +1,4 @@
-{ cmake, lib, stdenv, mkDerivation, fetchFromGitLab,
+{ cmake, lib, mkDerivation, fetchFromGitLab,
   qtmultimedia, qttools, ... }:
 
 mkDerivation rec {
diff --git a/pkgs/applications/misc/todiff/default.nix b/pkgs/applications/misc/todiff/default.nix
index bc172c9b49fb..069a63fb66ba 100644
--- a/pkgs/applications/misc/todiff/default.nix
+++ b/pkgs/applications/misc/todiff/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, rustPlatform, fetchFromGitHub }:
+{ lib, rustPlatform, fetchFromGitHub }:
 
 rustPlatform.buildRustPackage rec {
   pname = "todiff";
diff --git a/pkgs/applications/misc/toot/default.nix b/pkgs/applications/misc/toot/default.nix
index d992d9cdc410..2a322b208819 100644
--- a/pkgs/applications/misc/toot/default.nix
+++ b/pkgs/applications/misc/toot/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   version = "0.27.0";
diff --git a/pkgs/applications/misc/topydo/default.nix b/pkgs/applications/misc/topydo/default.nix
index 4ff3090d1f85..3ea3511308b2 100644
--- a/pkgs/applications/misc/topydo/default.nix
+++ b/pkgs/applications/misc/topydo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, fetchFromGitHub, glibcLocales }:
+{ lib, python3Packages, fetchFromGitHub, glibcLocales }:
 
 with python3Packages;
 
diff --git a/pkgs/applications/misc/tty-share/default.nix b/pkgs/applications/misc/tty-share/default.nix
index be9a0bafcc62..a402a669fbea 100644
--- a/pkgs/applications/misc/tty-share/default.nix
+++ b/pkgs/applications/misc/tty-share/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 # Upstream has a `./vendor` directory with all deps which we rely upon.
 buildGoPackage rec {
diff --git a/pkgs/applications/misc/tut/default.nix b/pkgs/applications/misc/tut/default.nix
index 1fa3e9b7883a..893f901044ac 100644
--- a/pkgs/applications/misc/tut/default.nix
+++ b/pkgs/applications/misc/tut/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "tut";
diff --git a/pkgs/applications/misc/tzupdate/default.nix b/pkgs/applications/misc/tzupdate/default.nix
index 3873f8d248eb..f6416f0f3522 100644
--- a/pkgs/applications/misc/tzupdate/default.nix
+++ b/pkgs/applications/misc/tzupdate/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3 }:
+{ lib, python3 }:
 
 let
   inherit (python3.pkgs) buildPythonApplication fetchPypi requests;
diff --git a/pkgs/applications/misc/udiskie/default.nix b/pkgs/applications/misc/udiskie/default.nix
index e2178850da1c..87c49a19a196 100644
--- a/pkgs/applications/misc/udiskie/default.nix
+++ b/pkgs/applications/misc/udiskie/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, asciidoc-full, gettext
+{ lib, fetchFromGitHub, asciidoc-full, gettext
 , gobject-introspection, gtk3, libappindicator-gtk3, libnotify, librsvg
 , udisks2, wrapGAppsHook
 , python3Packages
diff --git a/pkgs/applications/misc/ulauncher/default.nix b/pkgs/applications/misc/ulauncher/default.nix
index 8c17d2642937..989649ec4146 100644
--- a/pkgs/applications/misc/ulauncher/default.nix
+++ b/pkgs/applications/misc/ulauncher/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchurl
 , nix-update-script
 , python3Packages
diff --git a/pkgs/applications/misc/urlscan/default.nix b/pkgs/applications/misc/urlscan/default.nix
index 3e97088371ac..a56a09a8e348 100644
--- a/pkgs/applications/misc/urlscan/default.nix
+++ b/pkgs/applications/misc/urlscan/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, fetchFromGitHub }:
+{ lib, python3Packages, fetchFromGitHub }:
 
 python3Packages.buildPythonApplication rec {
   pname = "urlscan";
diff --git a/pkgs/applications/misc/valentina/default.nix b/pkgs/applications/misc/valentina/default.nix
index 1818ed9a2153..7329d8204cd7 100644
--- a/pkgs/applications/misc/valentina/default.nix
+++ b/pkgs/applications/misc/valentina/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchhg
+{ mkDerivation, lib, fetchhg
 , qmake, qttools
 , qtbase, qtsvg, qtxmlpatterns
 , poppler_utils
diff --git a/pkgs/applications/misc/vym/default.nix b/pkgs/applications/misc/vym/default.nix
index b4591d8717c6..9d820fc4da70 100644
--- a/pkgs/applications/misc/vym/default.nix
+++ b/pkgs/applications/misc/vym/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchurl, pkg-config, qmake, qtscript, qtsvg }:
+{ lib, mkDerivation, fetchurl, pkg-config, qmake, qtscript, qtsvg }:
 
 mkDerivation rec {
   pname = "vym";
diff --git a/pkgs/applications/misc/wego/default.nix b/pkgs/applications/misc/wego/default.nix
index 74c424a277b1..4bbd0289a156 100644
--- a/pkgs/applications/misc/wego/default.nix
+++ b/pkgs/applications/misc/wego/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   pname = "wego";
diff --git a/pkgs/applications/misc/wikicurses/default.nix b/pkgs/applications/misc/wikicurses/default.nix
index e234a9007fd5..ec7dff141439 100644
--- a/pkgs/applications/misc/wikicurses/default.nix
+++ b/pkgs/applications/misc/wikicurses/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, pythonPackages }:
+{ lib, fetchFromGitHub, pythonPackages }:
 
 pythonPackages.buildPythonApplication rec {
   version = "1.4";
diff --git a/pkgs/applications/misc/xdgmenumaker/default.nix b/pkgs/applications/misc/xdgmenumaker/default.nix
index c1af7ae373c6..00ae2df100e3 100644
--- a/pkgs/applications/misc/xdgmenumaker/default.nix
+++ b/pkgs/applications/misc/xdgmenumaker/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, txt2tags, python3Packages, glib, gobject-introspection, wrapGAppsHook }:
+{ lib, fetchFromGitHub, txt2tags, python3Packages, glib, gobject-introspection, wrapGAppsHook }:
 
 python3Packages.buildPythonApplication rec {
   pname = "xdgmenumaker";
diff --git a/pkgs/applications/misc/yokadi/default.nix b/pkgs/applications/misc/yokadi/default.nix
index ca329521142c..e31a69963ff0 100644
--- a/pkgs/applications/misc/yokadi/default.nix
+++ b/pkgs/applications/misc/yokadi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, buildPythonApplication, dateutil,
+{ lib, fetchurl, buildPythonApplication, dateutil,
   sqlalchemy, setproctitle, icalendar }:
 
 buildPythonApplication rec {
diff --git a/pkgs/applications/misc/zk-shell/default.nix b/pkgs/applications/misc/zk-shell/default.nix
index 5e27f9d45b6a..1dbaa842ba43 100644
--- a/pkgs/applications/misc/zk-shell/default.nix
+++ b/pkgs/applications/misc/zk-shell/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, pythonPackages }:
+{ lib, fetchFromGitHub, pythonPackages }:
 
 pythonPackages.buildPythonApplication rec {
   version = "1.0.0";
diff --git a/pkgs/applications/misc/zscroll/default.nix b/pkgs/applications/misc/zscroll/default.nix
index 748bc21ee35f..3acac8b3c68d 100644
--- a/pkgs/applications/misc/zscroll/default.nix
+++ b/pkgs/applications/misc/zscroll/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3, python3Packages, fetchFromGitHub }:
+{ lib, python3, python3Packages, fetchFromGitHub }:
 
 let version = "1.0"; in
 
diff --git a/pkgs/applications/networking/brig/default.nix b/pkgs/applications/networking/brig/default.nix
index a56a586b82a1..20b685a162fe 100644
--- a/pkgs/applications/networking/brig/default.nix
+++ b/pkgs/applications/networking/brig/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "brig";
diff --git a/pkgs/applications/networking/browsers/browsh/default.nix b/pkgs/applications/networking/browsers/browsh/default.nix
index aa57b9a17f64..e106eb7ff664 100644
--- a/pkgs/applications/networking/browsers/browsh/default.nix
+++ b/pkgs/applications/networking/browsers/browsh/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchurl, fetchFromGitHub, go-bindata }:
+{ lib, buildGoPackage, fetchurl, fetchFromGitHub, go-bindata }:
 
 let
   version = "1.6.4";
diff --git a/pkgs/applications/networking/browsers/castor/default.nix b/pkgs/applications/networking/browsers/castor/default.nix
index 6482ce59da6c..be3d8295f991 100644
--- a/pkgs/applications/networking/browsers/castor/default.nix
+++ b/pkgs/applications/networking/browsers/castor/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchurl
 , rustPlatform
 , pkg-config
diff --git a/pkgs/applications/networking/browsers/chromium/browser.nix b/pkgs/applications/networking/browsers/chromium/browser.nix
index 22d21a5efa5b..c4a5508b7537 100644
--- a/pkgs/applications/networking/browsers/chromium/browser.nix
+++ b/pkgs/applications/networking/browsers/chromium/browser.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkChromiumDerivation, channel, enableWideVine, ungoogled }:
+{ lib, mkChromiumDerivation, channel, enableWideVine, ungoogled }:
 
 with lib;
 
diff --git a/pkgs/applications/networking/browsers/eolie/default.nix b/pkgs/applications/networking/browsers/eolie/default.nix
index 6b3b63512307..874a73dae8e8 100644
--- a/pkgs/applications/networking/browsers/eolie/default.nix
+++ b/pkgs/applications/networking/browsers/eolie/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit, meson, ninja, pkg-config, nix-update-script
+{ lib, fetchgit, meson, ninja, pkg-config, nix-update-script
 , python3, gtk3, libsecret, gst_all_1, webkitgtk, glib
 , glib-networking, gtkspell3, hunspell, desktop-file-utils
 , gobject-introspection, wrapGAppsHook, gnome3 }:
diff --git a/pkgs/applications/networking/browsers/qutebrowser/default.nix b/pkgs/applications/networking/browsers/qutebrowser/default.nix
index 753ea1dc08d5..35130ab3393f 100644
--- a/pkgs/applications/networking/browsers/qutebrowser/default.nix
+++ b/pkgs/applications/networking/browsers/qutebrowser/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchurl, fetchzip, python3
+{ lib, fetchurl, fetchzip, python3
 , mkDerivationWith, wrapQtAppsHook, wrapGAppsHook, qtbase, glib-networking
 , asciidoc, docbook_xml_dtd_45, docbook_xsl, libxml2
 , libxslt, gst_all_1 ? null
diff --git a/pkgs/applications/networking/c14/default.nix b/pkgs/applications/networking/c14/default.nix
index 572975f78d0b..3a9192164adf 100644
--- a/pkgs/applications/networking/c14/default.nix
+++ b/pkgs/applications/networking/c14/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "c14-cli";
diff --git a/pkgs/applications/networking/cloudflared/default.nix b/pkgs/applications/networking/cloudflared/default.nix
index c82b297f9d69..810ea11b017b 100644
--- a/pkgs/applications/networking/cloudflared/default.nix
+++ b/pkgs/applications/networking/cloudflared/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "cloudflared";
diff --git a/pkgs/applications/networking/cluster/atlantis/default.nix b/pkgs/applications/networking/cluster/atlantis/default.nix
index c6f835351061..728e23ff380f 100644
--- a/pkgs/applications/networking/cluster/atlantis/default.nix
+++ b/pkgs/applications/networking/cluster/atlantis/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "atlantis";
diff --git a/pkgs/applications/networking/cluster/docker-machine/default.nix b/pkgs/applications/networking/cluster/docker-machine/default.nix
index 5a4f6b7db0e5..c483125d851c 100644
--- a/pkgs/applications/networking/cluster/docker-machine/default.nix
+++ b/pkgs/applications/networking/cluster/docker-machine/default.nix
@@ -1,5 +1,5 @@
 # This file was generated by go2nix.
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, installShellFiles }:
+{ lib, buildGoPackage, fetchFromGitHub, installShellFiles }:
 
 buildGoPackage rec {
   pname = "machine";
diff --git a/pkgs/applications/networking/cluster/docker-machine/kvm.nix b/pkgs/applications/networking/cluster/docker-machine/kvm.nix
index c833dea21c7e..4940f6331d44 100644
--- a/pkgs/applications/networking/cluster/docker-machine/kvm.nix
+++ b/pkgs/applications/networking/cluster/docker-machine/kvm.nix
@@ -1,5 +1,5 @@
 # This file was generated by go2nix.
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, libvirt, pkg-config }:
+{ lib, buildGoPackage, fetchFromGitHub, libvirt, pkg-config }:
 
 buildGoPackage rec {
   pname = "docker-machine-kvm";
diff --git a/pkgs/applications/networking/cluster/fluxcd/default.nix b/pkgs/applications/networking/cluster/fluxcd/default.nix
index 1dadc0b7f087..39399a7dbcf7 100644
--- a/pkgs/applications/networking/cluster/fluxcd/default.nix
+++ b/pkgs/applications/networking/cluster/fluxcd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, installShellFiles }:
+{ lib, buildGoModule, fetchFromGitHub, installShellFiles }:
 
 buildGoModule rec {
   pname = "fluxcd";
diff --git a/pkgs/applications/networking/cluster/fluxctl/default.nix b/pkgs/applications/networking/cluster/fluxctl/default.nix
index 896c04d6879e..4a8f42e3cc7e 100644
--- a/pkgs/applications/networking/cluster/fluxctl/default.nix
+++ b/pkgs/applications/networking/cluster/fluxctl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, installShellFiles }:
+{ lib, buildGoModule, fetchFromGitHub, installShellFiles }:
 
 buildGoModule rec {
   pname = "fluxctl";
diff --git a/pkgs/applications/networking/cluster/habitat/default.nix b/pkgs/applications/networking/cluster/habitat/default.nix
index f9b67b6821a6..d9827039500c 100644
--- a/pkgs/applications/networking/cluster/habitat/default.nix
+++ b/pkgs/applications/networking/cluster/habitat/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform, pkg-config
+{ lib, fetchFromGitHub, rustPlatform, pkg-config
 , libsodium, libarchive, openssl, zeromq }:
 
 rustPlatform.buildRustPackage rec {
diff --git a/pkgs/applications/networking/cluster/helm/default.nix b/pkgs/applications/networking/cluster/helm/default.nix
index 7d97896c360a..d823e38f3f23 100644
--- a/pkgs/applications/networking/cluster/helm/default.nix
+++ b/pkgs/applications/networking/cluster/helm/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, installShellFiles }:
+{ lib, buildGoModule, fetchFromGitHub, installShellFiles }:
 
 buildGoModule rec {
   pname = "helm";
diff --git a/pkgs/applications/networking/cluster/k9s/default.nix b/pkgs/applications/networking/cluster/k9s/default.nix
index abc23058303b..11e2b0a29153 100644
--- a/pkgs/applications/networking/cluster/k9s/default.nix
+++ b/pkgs/applications/networking/cluster/k9s/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "k9s";
diff --git a/pkgs/applications/networking/cluster/kops/default.nix b/pkgs/applications/networking/cluster/kops/default.nix
index 98ffcd6fe670..9b1a155a25b7 100644
--- a/pkgs/applications/networking/cluster/kops/default.nix
+++ b/pkgs/applications/networking/cluster/kops/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub, go-bindata, installShellFiles }:
+{ lib, buildGoPackage, fetchFromGitHub, go-bindata, installShellFiles }:
 let
   goPackagePath = "k8s.io/kops";
 
diff --git a/pkgs/applications/networking/cluster/kubeless/default.nix b/pkgs/applications/networking/cluster/kubeless/default.nix
index fd7eabf12761..38323b98b194 100644
--- a/pkgs/applications/networking/cluster/kubeless/default.nix
+++ b/pkgs/applications/networking/cluster/kubeless/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, installShellFiles }:
+{ lib, buildGoPackage, fetchFromGitHub, installShellFiles }:
 
 buildGoPackage rec {
   pname = "kubeless";
diff --git a/pkgs/applications/networking/cluster/kubelogin/default.nix b/pkgs/applications/networking/cluster/kubelogin/default.nix
index c72702fdc77a..d7f829dc00e3 100644
--- a/pkgs/applications/networking/cluster/kubelogin/default.nix
+++ b/pkgs/applications/networking/cluster/kubelogin/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoModule, go }:
+{ lib, fetchFromGitHub, buildGoModule, go }:
 
 buildGoModule rec {
   pname = "kubelogin";
diff --git a/pkgs/applications/networking/cluster/kubernix/default.nix b/pkgs/applications/networking/cluster/kubernix/default.nix
index 1411892b75b8..88cacfea4f1a 100644
--- a/pkgs/applications/networking/cluster/kubernix/default.nix
+++ b/pkgs/applications/networking/cluster/kubernix/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage rec {
   pname = "kubernix";
diff --git a/pkgs/applications/networking/cluster/kubeval/default.nix b/pkgs/applications/networking/cluster/kubeval/default.nix
index d26f8ed5dc67..28b3b7199974 100644
--- a/pkgs/applications/networking/cluster/kubeval/default.nix
+++ b/pkgs/applications/networking/cluster/kubeval/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, buildGoModule, makeWrapper }:
+{ lib, fetchFromGitHub, buildGoModule, makeWrapper }:
 
 buildGoModule rec {
   pname = "kubeval";
diff --git a/pkgs/applications/networking/cluster/linkerd/default.nix b/pkgs/applications/networking/cluster/linkerd/default.nix
index 8718da462469..11b62f479c78 100644
--- a/pkgs/applications/networking/cluster/linkerd/default.nix
+++ b/pkgs/applications/networking/cluster/linkerd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoModule }:
+{ lib, fetchFromGitHub, buildGoModule }:
 
 buildGoModule {
   pname = "linkerd-unstable";
diff --git a/pkgs/applications/networking/cluster/openshift/default.nix b/pkgs/applications/networking/cluster/openshift/default.nix
index 09bf82e43fed..53209d2edd67 100644
--- a/pkgs/applications/networking/cluster/openshift/default.nix
+++ b/pkgs/applications/networking/cluster/openshift/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, buildGoPackage, which, go-bindata, rsync, util-linux
+{ lib, fetchFromGitHub, buildGoPackage, which, go-bindata, rsync, util-linux
 , coreutils, kerberos, ncurses, clang, installShellFiles
 , components ? [
   "cmd/oc"
diff --git a/pkgs/applications/networking/cluster/popeye/default.nix b/pkgs/applications/networking/cluster/popeye/default.nix
index 650532ae8b96..89802f12be5e 100644
--- a/pkgs/applications/networking/cluster/popeye/default.nix
+++ b/pkgs/applications/networking/cluster/popeye/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "popeye";
diff --git a/pkgs/applications/networking/cluster/ssm-agent/default.nix b/pkgs/applications/networking/cluster/ssm-agent/default.nix
index 80c8244bee1b..928fb351c6a0 100644
--- a/pkgs/applications/networking/cluster/ssm-agent/default.nix
+++ b/pkgs/applications/networking/cluster/ssm-agent/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoPackage, bash, makeWrapper }:
+{ lib, fetchFromGitHub, buildGoPackage, bash, makeWrapper }:
 
 buildGoPackage rec {
   pname   = "amazon-ssm-agent";
diff --git a/pkgs/applications/networking/cluster/terraform-inventory/default.nix b/pkgs/applications/networking/cluster/terraform-inventory/default.nix
index 7b9bf354af75..085b504314ee 100644
--- a/pkgs/applications/networking/cluster/terraform-inventory/default.nix
+++ b/pkgs/applications/networking/cluster/terraform-inventory/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub}:
+{ lib, buildGoPackage, fetchFromGitHub}:
 
 buildGoPackage rec {
   pname = "terraform-inventory";
diff --git a/pkgs/applications/networking/cluster/terraform-providers/ansible/default.nix b/pkgs/applications/networking/cluster/terraform-providers/ansible/default.nix
index 14d411c02396..b8e3c1540e94 100644
--- a/pkgs/applications/networking/cluster/terraform-providers/ansible/default.nix
+++ b/pkgs/applications/networking/cluster/terraform-providers/ansible/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoPackage }:
+{ lib, fetchFromGitHub, buildGoPackage }:
 buildGoPackage rec {
   pname = "terraform-provider-ansible";
   version = "1.0.3";
diff --git a/pkgs/applications/networking/cluster/terraform-providers/cloudfoundry/default.nix b/pkgs/applications/networking/cluster/terraform-providers/cloudfoundry/default.nix
index 0528bce81e3c..1ee986d20303 100644
--- a/pkgs/applications/networking/cluster/terraform-providers/cloudfoundry/default.nix
+++ b/pkgs/applications/networking/cluster/terraform-providers/cloudfoundry/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "terraform-provider-cloudfoundry";
diff --git a/pkgs/applications/networking/cluster/terraform-providers/elasticsearch/default.nix b/pkgs/applications/networking/cluster/terraform-providers/elasticsearch/default.nix
index 47e4f30d0092..6ae781046df4 100644
--- a/pkgs/applications/networking/cluster/terraform-providers/elasticsearch/default.nix
+++ b/pkgs/applications/networking/cluster/terraform-providers/elasticsearch/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoModule }:
+{ lib, fetchFromGitHub, buildGoModule }:
 buildGoModule rec {
   pname = "terraform-provider-elasticsearch";
   version = "0.7.0";
diff --git a/pkgs/applications/networking/cluster/terraform-providers/gandi/default.nix b/pkgs/applications/networking/cluster/terraform-providers/gandi/default.nix
index fe508f4fa2ef..13afa8d3818a 100644
--- a/pkgs/applications/networking/cluster/terraform-providers/gandi/default.nix
+++ b/pkgs/applications/networking/cluster/terraform-providers/gandi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoPackage }:
+{ lib, fetchFromGitHub, buildGoPackage }:
 buildGoPackage rec {
   pname = "terraform-provider-gandi";
   version = "1.0.0";
diff --git a/pkgs/applications/networking/cluster/terraform-providers/hcloud/default.nix b/pkgs/applications/networking/cluster/terraform-providers/hcloud/default.nix
index 97331e683efb..f9a848669344 100644
--- a/pkgs/applications/networking/cluster/terraform-providers/hcloud/default.nix
+++ b/pkgs/applications/networking/cluster/terraform-providers/hcloud/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "terraform-provider-hcloud";
diff --git a/pkgs/applications/networking/cluster/terraform-providers/keycloak/default.nix b/pkgs/applications/networking/cluster/terraform-providers/keycloak/default.nix
index f2244345a9c3..043e081d94ed 100644
--- a/pkgs/applications/networking/cluster/terraform-providers/keycloak/default.nix
+++ b/pkgs/applications/networking/cluster/terraform-providers/keycloak/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , buildGoModule
 }:
diff --git a/pkgs/applications/networking/cluster/terraform-providers/libvirt/default.nix b/pkgs/applications/networking/cluster/terraform-providers/libvirt/default.nix
index 6a1f895c053b..ed2409ead9a3 100644
--- a/pkgs/applications/networking/cluster/terraform-providers/libvirt/default.nix
+++ b/pkgs/applications/networking/cluster/terraform-providers/libvirt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, fetchpatch, libvirt, pkg-config, makeWrapper, cdrtools }:
+{ lib, buildGoPackage, fetchFromGitHub, fetchpatch, libvirt, pkg-config, makeWrapper, cdrtools }:
 
 # USAGE:
 # install the following package globally or in nix-shell:
diff --git a/pkgs/applications/networking/cluster/terraform-providers/linuxbox/default.nix b/pkgs/applications/networking/cluster/terraform-providers/linuxbox/default.nix
index f445d48eaee2..4f8c44aad3f1 100644
--- a/pkgs/applications/networking/cluster/terraform-providers/linuxbox/default.nix
+++ b/pkgs/applications/networking/cluster/terraform-providers/linuxbox/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "terraform-provider-linuxbox";
diff --git a/pkgs/applications/networking/cluster/terraform-providers/lxd/default.nix b/pkgs/applications/networking/cluster/terraform-providers/lxd/default.nix
index 6ccc551b4d31..23d41ce7f1fa 100644
--- a/pkgs/applications/networking/cluster/terraform-providers/lxd/default.nix
+++ b/pkgs/applications/networking/cluster/terraform-providers/lxd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "terraform-provider-lxd";
diff --git a/pkgs/applications/networking/cluster/terraform-providers/shell/default.nix b/pkgs/applications/networking/cluster/terraform-providers/shell/default.nix
index 2bf767587528..f2e9b86a6467 100644
--- a/pkgs/applications/networking/cluster/terraform-providers/shell/default.nix
+++ b/pkgs/applications/networking/cluster/terraform-providers/shell/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoModule }:
+{ lib, fetchFromGitHub, buildGoModule }:
 buildGoModule rec {
   pname = "terraform-provider-shell";
   version = "1.6.0";
diff --git a/pkgs/applications/networking/cluster/terraform-providers/vercel/default.nix b/pkgs/applications/networking/cluster/terraform-providers/vercel/default.nix
index f4cfe6ba02f7..f37d1ac5d87a 100644
--- a/pkgs/applications/networking/cluster/terraform-providers/vercel/default.nix
+++ b/pkgs/applications/networking/cluster/terraform-providers/vercel/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "terraform-provider-vercel";
diff --git a/pkgs/applications/networking/cluster/terraform-providers/vpsadmin/default.nix b/pkgs/applications/networking/cluster/terraform-providers/vpsadmin/default.nix
index 4f56070fa51c..93401dfc635b 100644
--- a/pkgs/applications/networking/cluster/terraform-providers/vpsadmin/default.nix
+++ b/pkgs/applications/networking/cluster/terraform-providers/vpsadmin/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoModule }:
+{ lib, fetchFromGitHub, buildGoModule }:
 buildGoModule rec {
   pname = "terraform-provider-vpsadmin";
   version = "0.1.0";
diff --git a/pkgs/applications/networking/cluster/tilt/default.nix b/pkgs/applications/networking/cluster/tilt/default.nix
index 9f2a223c4486..2a6a808b0c93 100644
--- a/pkgs/applications/networking/cluster/tilt/default.nix
+++ b/pkgs/applications/networking/cluster/tilt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "tilt";
diff --git a/pkgs/applications/networking/cluster/velero/default.nix b/pkgs/applications/networking/cluster/velero/default.nix
index ec95b090c2e5..250d6cfc1a0f 100644
--- a/pkgs/applications/networking/cluster/velero/default.nix
+++ b/pkgs/applications/networking/cluster/velero/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, installShellFiles }:
+{ lib, buildGoModule, fetchFromGitHub, installShellFiles }:
 
 buildGoModule rec {
   pname = "velero";
diff --git a/pkgs/applications/networking/datovka/default.nix b/pkgs/applications/networking/datovka/default.nix
index ca675dd7836c..a48bd4ae44d5 100644
--- a/pkgs/applications/networking/datovka/default.nix
+++ b/pkgs/applications/networking/datovka/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , mkDerivation
 , fetchurl
 , libxml2
diff --git a/pkgs/applications/networking/dyndns/cfdyndns/default.nix b/pkgs/applications/networking/dyndns/cfdyndns/default.nix
index 23f557a1e6da..dae9ad3bc33c 100644
--- a/pkgs/applications/networking/dyndns/cfdyndns/default.nix
+++ b/pkgs/applications/networking/dyndns/cfdyndns/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform, pkg-config, openssl }:
+{ lib, fetchFromGitHub, rustPlatform, pkg-config, openssl }:
 
 with rustPlatform;
 
diff --git a/pkgs/applications/networking/feedreaders/canto-curses/default.nix b/pkgs/applications/networking/feedreaders/canto-curses/default.nix
index 39d9aa905961..729d12c1e5b9 100644
--- a/pkgs/applications/networking/feedreaders/canto-curses/default.nix
+++ b/pkgs/applications/networking/feedreaders/canto-curses/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages, readline, ncurses, canto-daemon }:
+{ lib, fetchFromGitHub, python3Packages, readline, ncurses, canto-daemon }:
 
 python3Packages.buildPythonApplication rec {
   version = "0.9.9";
diff --git a/pkgs/applications/networking/feedreaders/canto-daemon/default.nix b/pkgs/applications/networking/feedreaders/canto-daemon/default.nix
index a67e0c3aed2b..5eb8c9d74379 100644
--- a/pkgs/applications/networking/feedreaders/canto-daemon/default.nix
+++ b/pkgs/applications/networking/feedreaders/canto-daemon/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages, }:
+{ lib, fetchFromGitHub, python3Packages, }:
 
 python3Packages.buildPythonApplication rec {
   version = "0.9.8";
diff --git a/pkgs/applications/networking/feedreaders/feeds/default.nix b/pkgs/applications/networking/feedreaders/feeds/default.nix
index 243999553e69..8b83762089d6 100644
--- a/pkgs/applications/networking/feedreaders/feeds/default.nix
+++ b/pkgs/applications/networking/feedreaders/feeds/default.nix
@@ -1,6 +1,6 @@
 { lib
 , callPackage
-, stdenv
+
 , fetchFromGitLab
 
 , appstream
diff --git a/pkgs/applications/networking/feedreaders/rawdog/default.nix b/pkgs/applications/networking/feedreaders/rawdog/default.nix
index d24e0fbf7170..f840c191f909 100644
--- a/pkgs/applications/networking/feedreaders/rawdog/default.nix
+++ b/pkgs/applications/networking/feedreaders/rawdog/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, python2Packages }:
+{ lib, fetchurl, python2Packages }:
 
 python2Packages.buildPythonApplication rec {
   pname = "rawdog";
diff --git a/pkgs/applications/networking/flent/default.nix b/pkgs/applications/networking/flent/default.nix
index 5f9350b70cd8..bcff9e4f8b74 100644
--- a/pkgs/applications/networking/flent/default.nix
+++ b/pkgs/applications/networking/flent/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonApplication, fetchPypi, matplotlib, procps, pyqt5, python
+{ lib, buildPythonApplication, fetchPypi, matplotlib, procps, pyqt5, python
 , pythonPackages, qt5, sphinx, xvfb_run }:
 
 buildPythonApplication rec {
diff --git a/pkgs/applications/networking/gdrive/default.nix b/pkgs/applications/networking/gdrive/default.nix
index b51512332c5a..b62bda3c469f 100644
--- a/pkgs/applications/networking/gdrive/default.nix
+++ b/pkgs/applications/networking/gdrive/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "gdrive";
diff --git a/pkgs/applications/networking/gns3/server.nix b/pkgs/applications/networking/gns3/server.nix
index c2ca0f580c35..62fdfd71f235 100644
--- a/pkgs/applications/networking/gns3/server.nix
+++ b/pkgs/applications/networking/gns3/server.nix
@@ -1,6 +1,6 @@
 { stable, branch, version, sha256Hash, mkOverride, commonOverrides }:
 
-{ lib, stdenv, python3, fetchFromGitHub }:
+{ lib, python3, fetchFromGitHub }:
 
 let
   defaultOverrides = commonOverrides ++ [
diff --git a/pkgs/applications/networking/instant-messengers/blink/default.nix b/pkgs/applications/networking/instant-messengers/blink/default.nix
index 9dd6754af0cb..7ed3b1673831 100644
--- a/pkgs/applications/networking/instant-messengers/blink/default.nix
+++ b/pkgs/applications/networking/instant-messengers/blink/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchdarcs, pythonPackages, libvncserver, zlib
+{ lib, fetchdarcs, pythonPackages, libvncserver, zlib
 , gnutls, libvpx, makeDesktopItem, mkDerivationWith }:
 
 mkDerivationWith pythonPackages.buildPythonApplication rec {
diff --git a/pkgs/applications/networking/instant-messengers/cordless/default.nix b/pkgs/applications/networking/instant-messengers/cordless/default.nix
index 5d95eddb6b63..a906c46c4aef 100644
--- a/pkgs/applications/networking/instant-messengers/cordless/default.nix
+++ b/pkgs/applications/networking/instant-messengers/cordless/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "cordless";
diff --git a/pkgs/applications/networking/instant-messengers/coyim/default.nix b/pkgs/applications/networking/instant-messengers/coyim/default.nix
index 0de7e264ec41..31896f20184f 100644
--- a/pkgs/applications/networking/instant-messengers/coyim/default.nix
+++ b/pkgs/applications/networking/instant-messengers/coyim/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, pkg-config,
+{ lib, buildGoPackage, fetchFromGitHub, pkg-config,
   cairo, gdk-pixbuf, glib, gnome3, wrapGAppsHook, gtk3 }:
 
 buildGoPackage rec {
diff --git a/pkgs/applications/networking/instant-messengers/element/element-desktop.nix b/pkgs/applications/networking/instant-messengers/element/element-desktop.nix
index fcd06326e213..274298226ec4 100644
--- a/pkgs/applications/networking/instant-messengers/element/element-desktop.nix
+++ b/pkgs/applications/networking/instant-messengers/element/element-desktop.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub
+{ lib, fetchFromGitHub
 , makeWrapper, makeDesktopItem, mkYarnPackage
 , electron, element-web
 }:
diff --git a/pkgs/applications/networking/instant-messengers/ferdi/default.nix b/pkgs/applications/networking/instant-messengers/ferdi/default.nix
index 458808c832da..e4f8d3c99ee9 100644
--- a/pkgs/applications/networking/instant-messengers/ferdi/default.nix
+++ b/pkgs/applications/networking/instant-messengers/ferdi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkFranzDerivation, fetchurl }:
+{ lib, mkFranzDerivation, fetchurl }:
 
 mkFranzDerivation rec {
   pname = "ferdi";
diff --git a/pkgs/applications/networking/instant-messengers/franz/default.nix b/pkgs/applications/networking/instant-messengers/franz/default.nix
index a72ff17abcd4..9f772bf3f6d7 100644
--- a/pkgs/applications/networking/instant-messengers/franz/default.nix
+++ b/pkgs/applications/networking/instant-messengers/franz/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkFranzDerivation, fetchurl }:
+{ lib, mkFranzDerivation, fetchurl }:
 
 mkFranzDerivation rec {
   pname = "franz";
diff --git a/pkgs/applications/networking/instant-messengers/linphone/default.nix b/pkgs/applications/networking/instant-messengers/linphone/default.nix
index a3df74a00161..f0846fc63f7e 100644
--- a/pkgs/applications/networking/instant-messengers/linphone/default.nix
+++ b/pkgs/applications/networking/instant-messengers/linphone/default.nix
@@ -45,7 +45,7 @@
 , readline
 , speex
 , sqlite
-, stdenv
+
 , udev
 , zlib
 }:
diff --git a/pkgs/applications/networking/instant-messengers/matrixcli/default.nix b/pkgs/applications/networking/instant-messengers/matrixcli/default.nix
index bca999f5762a..aadb18606e11 100644
--- a/pkgs/applications/networking/instant-messengers/matrixcli/default.nix
+++ b/pkgs/applications/networking/instant-messengers/matrixcli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit
+{ lib, fetchgit
   , buildPythonApplication, buildPythonPackage
   , pygobject3, pytestrunner, requests, responses, pytest, python-olm
   , canonicaljson, olm
diff --git a/pkgs/applications/networking/instant-messengers/mm/default.nix b/pkgs/applications/networking/instant-messengers/mm/default.nix
index 7229218a704d..c8f24e72a9ae 100644
--- a/pkgs/applications/networking/instant-messengers/mm/default.nix
+++ b/pkgs/applications/networking/instant-messengers/mm/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchgit }:
+{ lib, buildGoModule, fetchgit }:
 
 buildGoModule {
   pname = "mm";
diff --git a/pkgs/applications/networking/instant-messengers/neochat/default.nix b/pkgs/applications/networking/instant-messengers/neochat/default.nix
index bcd6fdc9f3e4..cd456b336dd6 100644
--- a/pkgs/applications/networking/instant-messengers/neochat/default.nix
+++ b/pkgs/applications/networking/instant-messengers/neochat/default.nix
@@ -1,5 +1,5 @@
 { mkDerivation
-, lib, stdenv
+, lib
 , fetchFromGitLab
 , pkg-config
 , cmake
diff --git a/pkgs/applications/networking/instant-messengers/pybitmessage/default.nix b/pkgs/applications/networking/instant-messengers/pybitmessage/default.nix
index 06f02fa80946..279eea2f2d7b 100644
--- a/pkgs/applications/networking/instant-messengers/pybitmessage/default.nix
+++ b/pkgs/applications/networking/instant-messengers/pybitmessage/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python2Packages, openssl }:
+{ lib, fetchFromGitHub, python2Packages, openssl }:
 
 python2Packages.buildPythonApplication rec {
   pname = "pybitmessage";
diff --git a/pkgs/applications/networking/instant-messengers/rambox/rambox.nix b/pkgs/applications/networking/instant-messengers/rambox/rambox.nix
index 6881ae270f9b..56930f561c78 100644
--- a/pkgs/applications/networking/instant-messengers/rambox/rambox.nix
+++ b/pkgs/applications/networking/instant-messengers/rambox/rambox.nix
@@ -1,6 +1,6 @@
 { pname, version, src, meta, desktopName ? "Rambox" }:
 
-{ appimageTools, stdenv, lib, fetchurl, makeDesktopItem }:
+{ appimageTools, lib, fetchurl, makeDesktopItem }:
 
 let
   name = "${pname}-${version}";
diff --git a/pkgs/applications/networking/instant-messengers/ricochet/default.nix b/pkgs/applications/networking/instant-messengers/ricochet/default.nix
index 2a234edaa08b..97d8d39f6567 100644
--- a/pkgs/applications/networking/instant-messengers/ricochet/default.nix
+++ b/pkgs/applications/networking/instant-messengers/ricochet/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchurl, pkg-config, makeDesktopItem
+{ mkDerivation, lib, fetchurl, pkg-config, makeDesktopItem
 , qtbase, qttools, qtmultimedia, qtquick1, qtquickcontrols
 , openssl, protobuf, qmake
 }:
diff --git a/pkgs/applications/networking/instant-messengers/scudcloud/default.nix b/pkgs/applications/networking/instant-messengers/scudcloud/default.nix
index 55935f69e1c8..29d4c3600c39 100644
--- a/pkgs/applications/networking/instant-messengers/scudcloud/default.nix
+++ b/pkgs/applications/networking/instant-messengers/scudcloud/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, python3Packages }:
+{ lib, fetchurl, python3Packages }:
 
 let version = "1.63";
 in python3Packages.buildPythonPackage {
diff --git a/pkgs/applications/networking/instant-messengers/slack-term/default.nix b/pkgs/applications/networking/instant-messengers/slack-term/default.nix
index 66d59346c4b1..30cc7396c562 100644
--- a/pkgs/applications/networking/instant-messengers/slack-term/default.nix
+++ b/pkgs/applications/networking/instant-messengers/slack-term/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   # https://github.com/erroneousboat/slack-term
diff --git a/pkgs/applications/networking/instant-messengers/swift-im/default.nix b/pkgs/applications/networking/instant-messengers/swift-im/default.nix
index 1dadc728eeef..58335bed4218 100644
--- a/pkgs/applications/networking/instant-messengers/swift-im/default.nix
+++ b/pkgs/applications/networking/instant-messengers/swift-im/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchurl, pkg-config, qttools, sconsPackages
+{ mkDerivation, lib, fetchurl, pkg-config, qttools, sconsPackages
 , GConf, avahi, boost, hunspell, libXScrnSaver, libedit, libidn, libnatpmp, libxml2
 , lua, miniupnpc, openssl, qtbase, qtmultimedia, qtsvg, qtwebkit, qtx11extras, zlib
 }:
diff --git a/pkgs/applications/networking/instant-messengers/tensor/default.nix b/pkgs/applications/networking/instant-messengers/tensor/default.nix
index 93b3315c1eff..114b3ab8f4d1 100644
--- a/pkgs/applications/networking/instant-messengers/tensor/default.nix
+++ b/pkgs/applications/networking/instant-messengers/tensor/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchgit, qtbase, qtquickcontrols, qmake, makeDesktopItem }:
+{ mkDerivation, lib, fetchgit, qtbase, qtquickcontrols, qmake, makeDesktopItem }:
 
 # we now have libqmatrixclient so a future version of tensor that supports it
 # should use that
diff --git a/pkgs/applications/networking/instant-messengers/turses/default.nix b/pkgs/applications/networking/instant-messengers/turses/default.nix
index 4c49f41f623b..256e026a060e 100644
--- a/pkgs/applications/networking/instant-messengers/turses/default.nix
+++ b/pkgs/applications/networking/instant-messengers/turses/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchpatch, python3Packages }:
+{ lib, fetchpatch, python3Packages }:
 
 with lib;
 with python3Packages;
diff --git a/pkgs/applications/networking/instant-messengers/twinkle/default.nix b/pkgs/applications/networking/instant-messengers/twinkle/default.nix
index 004a4dab8236..8b306c075062 100644
--- a/pkgs/applications/networking/instant-messengers/twinkle/default.nix
+++ b/pkgs/applications/networking/instant-messengers/twinkle/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , cmake
 , libxml2
diff --git a/pkgs/applications/networking/instant-messengers/xmpp-client/default.nix b/pkgs/applications/networking/instant-messengers/xmpp-client/default.nix
index fb1f5a0a69c6..4367230f7756 100644
--- a/pkgs/applications/networking/instant-messengers/xmpp-client/default.nix
+++ b/pkgs/applications/networking/instant-messengers/xmpp-client/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "xmpp-client";
diff --git a/pkgs/applications/networking/ipfs-cluster/default.nix b/pkgs/applications/networking/ipfs-cluster/default.nix
index dcb25c736570..67d45c44868d 100644
--- a/pkgs/applications/networking/ipfs-cluster/default.nix
+++ b/pkgs/applications/networking/ipfs-cluster/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "ipfs-cluster";
diff --git a/pkgs/applications/networking/ipfs/default.nix b/pkgs/applications/networking/ipfs/default.nix
index fd9d8bd0d347..c54b4428819c 100644
--- a/pkgs/applications/networking/ipfs/default.nix
+++ b/pkgs/applications/networking/ipfs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchurl, nixosTests }:
+{ lib, buildGoModule, fetchurl, nixosTests }:
 
 buildGoModule rec {
   pname = "ipfs";
diff --git a/pkgs/applications/networking/ipget/default.nix b/pkgs/applications/networking/ipget/default.nix
index ded83f30a1af..8817d90dd6ed 100644
--- a/pkgs/applications/networking/ipget/default.nix
+++ b/pkgs/applications/networking/ipget/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "ipget";
diff --git a/pkgs/applications/networking/irc/qweechat/default.nix b/pkgs/applications/networking/irc/qweechat/default.nix
index 18a4872a44fa..c4a67c8098a3 100644
--- a/pkgs/applications/networking/irc/qweechat/default.nix
+++ b/pkgs/applications/networking/irc/qweechat/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python27Packages }:
+{ lib, fetchFromGitHub, python27Packages }:
 
 python27Packages.buildPythonApplication rec {
   version = "2016-07-29";
diff --git a/pkgs/applications/networking/irc/weechat/scripts/weechat-matrix/default.nix b/pkgs/applications/networking/irc/weechat/scripts/weechat-matrix/default.nix
index b77d9c984de4..07e4dd54e5e5 100644
--- a/pkgs/applications/networking/irc/weechat/scripts/weechat-matrix/default.nix
+++ b/pkgs/applications/networking/irc/weechat/scripts/weechat-matrix/default.nix
@@ -1,5 +1,5 @@
 { buildPythonPackage
-, lib, stdenv
+, lib
 , python
 , fetchFromGitHub
 , pyopenssl
diff --git a/pkgs/applications/networking/lieer/default.nix b/pkgs/applications/networking/lieer/default.nix
index aee21dca6458..3ad2762a2cfc 100644
--- a/pkgs/applications/networking/lieer/default.nix
+++ b/pkgs/applications/networking/lieer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   pname = "lieer";
diff --git a/pkgs/applications/networking/maestral-qt/default.nix b/pkgs/applications/networking/maestral-qt/default.nix
index dbcae7a0ec37..b568775481c1 100644
--- a/pkgs/applications/networking/maestral-qt/default.nix
+++ b/pkgs/applications/networking/maestral-qt/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , fetchFromGitHub
 , python3
 , wrapQtAppsHook
diff --git a/pkgs/applications/networking/mailreaders/aerc/default.nix b/pkgs/applications/networking/mailreaders/aerc/default.nix
index b01ec9ef2cd4..b43e6bb093c4 100644
--- a/pkgs/applications/networking/mailreaders/aerc/default.nix
+++ b/pkgs/applications/networking/mailreaders/aerc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchurl
+{ lib, buildGoModule, fetchurl
 , go, ncurses, notmuch, scdoc
 , python3, perl, w3m, dante
 , fetchFromGitHub
diff --git a/pkgs/applications/networking/mailreaders/afew/default.nix b/pkgs/applications/networking/mailreaders/afew/default.nix
index dbc55850f9fd..8a5f607dd32c 100644
--- a/pkgs/applications/networking/mailreaders/afew/default.nix
+++ b/pkgs/applications/networking/mailreaders/afew/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, notmuch }:
+{ lib, python3Packages, notmuch }:
 
 python3Packages.buildPythonApplication rec {
   pname = "afew";
diff --git a/pkgs/applications/networking/mailreaders/mailpile/default.nix b/pkgs/applications/networking/mailreaders/mailpile/default.nix
index 2cb1fd56ecca..1d1dc030c314 100644
--- a/pkgs/applications/networking/mailreaders/mailpile/default.nix
+++ b/pkgs/applications/networking/mailreaders/mailpile/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python2Packages, gnupg1orig, openssl, git }:
+{ lib, fetchFromGitHub, python2Packages, gnupg1orig, openssl, git }:
 
 python2Packages.buildPythonApplication rec {
   pname = "mailpile";
diff --git a/pkgs/applications/networking/mailreaders/meli/default.nix b/pkgs/applications/networking/mailreaders/meli/default.nix
index 2ced5e60db43..ec50e913176e 100644
--- a/pkgs/applications/networking/mailreaders/meli/default.nix
+++ b/pkgs/applications/networking/mailreaders/meli/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , fetchgit
 , rustPlatform
 , pkg-config
diff --git a/pkgs/applications/networking/mailreaders/mlarchive2maildir/default.nix b/pkgs/applications/networking/mailreaders/mlarchive2maildir/default.nix
index ea10bf892488..6cd0b3db7863 100644
--- a/pkgs/applications/networking/mailreaders/mlarchive2maildir/default.nix
+++ b/pkgs/applications/networking/mailreaders/mlarchive2maildir/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3, notmuch }:
+{ lib, python3, notmuch }:
 
 python3.pkgs.buildPythonApplication rec {
   pname = "mlarchive2maildir";
diff --git a/pkgs/applications/networking/owncloud-client/default.nix b/pkgs/applications/networking/owncloud-client/default.nix
index 452acc1c7ca3..761d0e6b2440 100644
--- a/pkgs/applications/networking/owncloud-client/default.nix
+++ b/pkgs/applications/networking/owncloud-client/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, mkDerivation, cmake, pkg-config, qtbase, qtkeychain, sqlite, libsecret }:
+{ lib, fetchurl, mkDerivation, cmake, pkg-config, qtbase, qtkeychain, sqlite, libsecret }:
 
 mkDerivation rec {
   pname = "owncloud-client";
diff --git a/pkgs/applications/networking/p2p/deluge/default.nix b/pkgs/applications/networking/p2p/deluge/default.nix
index 068776fe17a6..4587da48a4a0 100644
--- a/pkgs/applications/networking/p2p/deluge/default.nix
+++ b/pkgs/applications/networking/p2p/deluge/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, intltool, libtorrent-rasterbar, pythonPackages
+{ lib, fetchurl, intltool, libtorrent-rasterbar, pythonPackages
 , gtk3, glib, gobject-introspection, librsvg, wrapGAppsHook }:
 
 pythonPackages.buildPythonPackage rec {
diff --git a/pkgs/applications/networking/p2p/zeronet/default.nix b/pkgs/applications/networking/p2p/zeronet/default.nix
index 7deddf8578bb..4440b24a2b17 100644
--- a/pkgs/applications/networking/p2p/zeronet/default.nix
+++ b/pkgs/applications/networking/p2p/zeronet/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   pname = "zeronet";
diff --git a/pkgs/applications/networking/protocol/default.nix b/pkgs/applications/networking/protocol/default.nix
index 70723f486460..6690a75485bd 100644
--- a/pkgs/applications/networking/protocol/default.nix
+++ b/pkgs/applications/networking/protocol/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonApplication, fetchFromGitHub }:
+{ lib, buildPythonApplication, fetchFromGitHub }:
 
 buildPythonApplication {
   pname = "protocol-unstable";
diff --git a/pkgs/applications/networking/pyload/default.nix b/pkgs/applications/networking/pyload/default.nix
index dcfa88d9d4cd..f70359cf7ac2 100644
--- a/pkgs/applications/networking/pyload/default.nix
+++ b/pkgs/applications/networking/pyload/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, fetchpatch, pythonPackages, gocr, unrar, rhino, spidermonkey_38 }:
+{ lib, fetchFromGitHub, fetchpatch, pythonPackages, gocr, unrar, rhino, spidermonkey_38 }:
 
 let
   beautifulsoup = pythonPackages.callPackage ./beautifulsoup.nix {
diff --git a/pkgs/applications/networking/qv2ray/default.nix b/pkgs/applications/networking/qv2ray/default.nix
index 7c3c23a89ee6..7b97bd8543df 100644
--- a/pkgs/applications/networking/qv2ray/default.nix
+++ b/pkgs/applications/networking/qv2ray/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , mkDerivation
 , fetchFromGitHub
 , qmake
diff --git a/pkgs/applications/networking/remote/x2goclient/default.nix b/pkgs/applications/networking/remote/x2goclient/default.nix
index 7441cdf4eef7..4156c82f91b9 100644
--- a/pkgs/applications/networking/remote/x2goclient/default.nix
+++ b/pkgs/applications/networking/remote/x2goclient/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit, cups, libssh, libXpm, nx-libs, openldap, openssh
+{ lib, fetchgit, cups, libssh, libXpm, nx-libs, openldap, openssh
 , mkDerivation, qtbase, qtsvg, qtx11extras, qttools, phonon, pkg-config }:
 
 mkDerivation {
diff --git a/pkgs/applications/networking/shellhub-agent/default.nix b/pkgs/applications/networking/shellhub-agent/default.nix
index db9e112a0639..f66df96e9dbb 100644
--- a/pkgs/applications/networking/shellhub-agent/default.nix
+++ b/pkgs/applications/networking/shellhub-agent/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildGoModule
 , fetchFromGitHub
 , genericUpdater
diff --git a/pkgs/applications/networking/soulseek/nicotine-plus/default.nix b/pkgs/applications/networking/soulseek/nicotine-plus/default.nix
index 7cfe9ddfc971..045120813f0d 100644
--- a/pkgs/applications/networking/soulseek/nicotine-plus/default.nix
+++ b/pkgs/applications/networking/soulseek/nicotine-plus/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python27Packages, geoip }:
+{ lib, fetchFromGitHub, python27Packages, geoip }:
 
 with lib;
 
diff --git a/pkgs/applications/networking/sync/acd_cli/default.nix b/pkgs/applications/networking/sync/acd_cli/default.nix
index 2f83873fbf8e..49fc578377c2 100644
--- a/pkgs/applications/networking/sync/acd_cli/default.nix
+++ b/pkgs/applications/networking/sync/acd_cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonApplication, fuse
+{ lib, fetchFromGitHub, buildPythonApplication, fuse
 , appdirs, colorama, dateutil, requests, requests_toolbelt
 , fusepy, sqlalchemy }:
 
diff --git a/pkgs/applications/networking/sync/desync/default.nix b/pkgs/applications/networking/sync/desync/default.nix
index 689a2b3fddaa..bc2776657c20 100644
--- a/pkgs/applications/networking/sync/desync/default.nix
+++ b/pkgs/applications/networking/sync/desync/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "desync";
diff --git a/pkgs/applications/networking/syncthing-gtk/default.nix b/pkgs/applications/networking/syncthing-gtk/default.nix
index a7f9c5f9f4be..015033d6ca56 100644
--- a/pkgs/applications/networking/syncthing-gtk/default.nix
+++ b/pkgs/applications/networking/syncthing-gtk/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, fetchpatch, libnotify, librsvg, killall
+{ lib, fetchFromGitHub, fetchpatch, libnotify, librsvg, killall
 , gtk3, libappindicator-gtk3, substituteAll, syncthing, wrapGAppsHook
 , gnome3, buildPythonApplication, dateutil, pyinotify, pygobject3
 , bcrypt, gobject-introspection, gsettings-desktop-schemas
diff --git a/pkgs/applications/networking/twtxt/default.nix b/pkgs/applications/networking/twtxt/default.nix
index 98877880255a..ff6e61c614f9 100644
--- a/pkgs/applications/networking/twtxt/default.nix
+++ b/pkgs/applications/networking/twtxt/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, buildGoModule }:
+{ lib, fetchFromGitHub, buildGoModule }:
 
 buildGoModule rec {
   pname = "twtxt";
diff --git a/pkgs/applications/networking/versus/default.nix b/pkgs/applications/networking/versus/default.nix
index 5e1b1e873c93..1e3dd2113269 100644
--- a/pkgs/applications/networking/versus/default.nix
+++ b/pkgs/applications/networking/versus/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "versus";
diff --git a/pkgs/applications/office/beamerpresenter/default.nix b/pkgs/applications/office/beamerpresenter/default.nix
index c07b4c5e1aa1..4e8bcaee019e 100644
--- a/pkgs/applications/office/beamerpresenter/default.nix
+++ b/pkgs/applications/office/beamerpresenter/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, installShellFiles,
+{ lib, mkDerivation, fetchFromGitHub, installShellFiles,
   qmake, qtbase, poppler, qtmultimedia }:
 
 mkDerivation rec {
diff --git a/pkgs/applications/office/espanso/default.nix b/pkgs/applications/office/espanso/default.nix
index 808811e20e84..d20e19c68592 100644
--- a/pkgs/applications/office/espanso/default.nix
+++ b/pkgs/applications/office/espanso/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , rustPlatform
 , pkg-config
diff --git a/pkgs/applications/office/fava/default.nix b/pkgs/applications/office/fava/default.nix
index fd5f3b8d7c55..b070683e6f2a 100644
--- a/pkgs/applications/office/fava/default.nix
+++ b/pkgs/applications/office/fava/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3, beancount }:
+{ lib, python3, beancount }:
 
 let
   inherit (python3.pkgs) buildPythonApplication fetchPypi;
diff --git a/pkgs/applications/office/gtg/default.nix b/pkgs/applications/office/gtg/default.nix
index 52558df5da81..4c892b2605bb 100644
--- a/pkgs/applications/office/gtg/default.nix
+++ b/pkgs/applications/office/gtg/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , meson
 , python3Packages
diff --git a/pkgs/applications/office/keepnote/default.nix b/pkgs/applications/office/keepnote/default.nix
index 30b4d5fa690b..14f48da22309 100644
--- a/pkgs/applications/office/keepnote/default.nix
+++ b/pkgs/applications/office/keepnote/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, python2Packages }:
+{ lib, fetchurl, python2Packages }:
 
 python2Packages.buildPythonApplication {
   name = "keepnote-0.7.8";
diff --git a/pkgs/applications/office/ledger-autosync/default.nix b/pkgs/applications/office/ledger-autosync/default.nix
index 81e49e6e0aa9..90e5995669e8 100644
--- a/pkgs/applications/office/ledger-autosync/default.nix
+++ b/pkgs/applications/office/ledger-autosync/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, fetchFromGitHub, ledger, hledger, useLedger ? true, useHledger ? true }:
+{ lib, python3Packages, fetchFromGitHub, ledger, hledger, useLedger ? true, useHledger ? true }:
 
 python3Packages.buildPythonApplication rec {
   pname = "ledger-autosync";
diff --git a/pkgs/applications/office/libreoffice/src-fresh/override.nix b/pkgs/applications/office/libreoffice/src-fresh/override.nix
index 8586fa1f673b..0141b74c3890 100644
--- a/pkgs/applications/office/libreoffice/src-fresh/override.nix
+++ b/pkgs/applications/office/libreoffice/src-fresh/override.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, kdeIntegration, ... }:
+{ lib, kdeIntegration, ... }:
 attrs:
 {
   postConfigure = attrs.postConfigure + ''
diff --git a/pkgs/applications/office/libreoffice/src-still/override.nix b/pkgs/applications/office/libreoffice/src-still/override.nix
index 119b5a645d6e..50812d0efb94 100644
--- a/pkgs/applications/office/libreoffice/src-still/override.nix
+++ b/pkgs/applications/office/libreoffice/src-still/override.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, kdeIntegration, fetchpatch, ... }:
+{ lib, kdeIntegration, fetchpatch, ... }:
 attrs:
 {
   patches = attrs.patches or [ ] ++ [
diff --git a/pkgs/applications/office/mytetra/default.nix b/pkgs/applications/office/mytetra/default.nix
index f48ec3fb237c..384d7fadaf0f 100644
--- a/pkgs/applications/office/mytetra/default.nix
+++ b/pkgs/applications/office/mytetra/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchurl, qmake, qtsvg, makeWrapper, xdg_utils }:
+{ lib, mkDerivation, fetchurl, qmake, qtsvg, makeWrapper, xdg_utils }:
 
 let
   version = "1.44.55";
diff --git a/pkgs/applications/office/qnotero/default.nix b/pkgs/applications/office/qnotero/default.nix
index 6ffdd5fefedd..4459e42356aa 100644
--- a/pkgs/applications/office/qnotero/default.nix
+++ b/pkgs/applications/office/qnotero/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages, wrapQtAppsHook }:
+{ lib, fetchFromGitHub, python3Packages, wrapQtAppsHook }:
 
 python3Packages.buildPythonPackage rec {
   pname = "qnotero";
diff --git a/pkgs/applications/office/scribus/unstable.nix b/pkgs/applications/office/scribus/unstable.nix
index 7f4054bfb4ed..acf44880452b 100644
--- a/pkgs/applications/office/scribus/unstable.nix
+++ b/pkgs/applications/office/scribus/unstable.nix
@@ -22,7 +22,7 @@
 , qtbase
 , qtimageformats
 , qttools
-, lib, stdenv
+, lib
 }:
 
 let
diff --git a/pkgs/applications/office/skanlite/default.nix b/pkgs/applications/office/skanlite/default.nix
index 7436054715d8..89cf2add212c 100644
--- a/pkgs/applications/office/skanlite/default.nix
+++ b/pkgs/applications/office/skanlite/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchurl, cmake, extra-cmake-modules, qtbase,
+{ lib, mkDerivation, fetchurl, cmake, extra-cmake-modules, qtbase,
   kcoreaddons, kdoctools, ki18n, kio, kxmlgui, ktextwidgets,
   libksane
 }:
diff --git a/pkgs/applications/office/timeular/default.nix b/pkgs/applications/office/timeular/default.nix
index 63f86171dce9..6c1068d45844 100644
--- a/pkgs/applications/office/timeular/default.nix
+++ b/pkgs/applications/office/timeular/default.nix
@@ -1,5 +1,5 @@
 {
-  lib, stdenv,
+  lib,
   fetchurl,
   appimageTools,
   libsecret
diff --git a/pkgs/applications/office/todoman/default.nix b/pkgs/applications/office/todoman/default.nix
index dc788a6f1957..4011879ddb83 100644
--- a/pkgs/applications/office/todoman/default.nix
+++ b/pkgs/applications/office/todoman/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , python3
 , glibcLocales
 , installShellFiles
diff --git a/pkgs/applications/office/tryton/default.nix b/pkgs/applications/office/tryton/default.nix
index 6b49a27a08a5..65eb48f3b2d9 100644
--- a/pkgs/applications/office/tryton/default.nix
+++ b/pkgs/applications/office/tryton/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , python3Packages
 , pkg-config
 , librsvg
diff --git a/pkgs/applications/office/watson/default.nix b/pkgs/applications/office/watson/default.nix
index 30992e60a6fc..18c1b9469e75 100644
--- a/pkgs/applications/office/watson/default.nix
+++ b/pkgs/applications/office/watson/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, pythonPackages, installShellFiles }:
+{ lib, fetchFromGitHub, pythonPackages, installShellFiles }:
 
 with pythonPackages;
 
diff --git a/pkgs/applications/radio/chirp/default.nix b/pkgs/applications/radio/chirp/default.nix
index 6b84e47909dd..e9b446dc5847 100644
--- a/pkgs/applications/radio/chirp/default.nix
+++ b/pkgs/applications/radio/chirp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchurl
 , python2
 }:
diff --git a/pkgs/applications/radio/gqrx/default.nix b/pkgs/applications/radio/gqrx/default.nix
index 8a6123099097..217818f67c29 100644
--- a/pkgs/applications/radio/gqrx/default.nix
+++ b/pkgs/applications/radio/gqrx/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, cmake, qtbase, qtsvg, gnuradio, boost, gr-osmosdr
+{ lib, fetchFromGitHub, cmake, qtbase, qtsvg, gnuradio, boost, gr-osmosdr
 , mkDerivation
 # drivers (optional):
 , rtl-sdr, hackrf
diff --git a/pkgs/applications/radio/qsstv/default.nix b/pkgs/applications/radio/qsstv/default.nix
index d92cf9e25cdb..e6fa95b5dc78 100644
--- a/pkgs/applications/radio/qsstv/default.nix
+++ b/pkgs/applications/radio/qsstv/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchurl, qtbase, qmake, openjpeg, pkg-config, fftw,
+{ mkDerivation, lib, fetchurl, qtbase, qmake, openjpeg, pkg-config, fftw,
   libpulseaudio, alsaLib, hamlib, libv4l, fftwFloat }:
 
 mkDerivation rec {
diff --git a/pkgs/applications/radio/quisk/default.nix b/pkgs/applications/radio/quisk/default.nix
index c0dab8773c71..19a4e715013d 100644
--- a/pkgs/applications/radio/quisk/default.nix
+++ b/pkgs/applications/radio/quisk/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python38Packages, fetchPypi
+{ lib, python38Packages, fetchPypi
 , fftw, alsaLib, pulseaudio, wxPython_4_0 }:
 
 python38Packages.buildPythonApplication rec {
diff --git a/pkgs/applications/radio/urh/default.nix b/pkgs/applications/radio/urh/default.nix
index 3a51f77d7bd6..00d3431b6e37 100644
--- a/pkgs/applications/radio/urh/default.nix
+++ b/pkgs/applications/radio/urh/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, python3Packages
+{ lib, fetchFromGitHub, python3Packages
 , hackrf, rtl-sdr, airspy, limesuite, libiio
 , qt5
 , USRPSupport ? false, uhd }:
diff --git a/pkgs/applications/science/biology/eggnog-mapper/default.nix b/pkgs/applications/science/biology/eggnog-mapper/default.nix
index c6defb245c7f..7eb3afd437af 100644
--- a/pkgs/applications/science/biology/eggnog-mapper/default.nix
+++ b/pkgs/applications/science/biology/eggnog-mapper/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, fetchpatch, makeWrapper, python27Packages, wget, diamond, hmmer }:
+{ lib, fetchFromGitHub, fetchpatch, makeWrapper, python27Packages, wget, diamond, hmmer }:
 
 python27Packages.buildPythonApplication rec {
   pname = "eggnog-mapper";
diff --git a/pkgs/applications/science/biology/obitools/obitools3.nix b/pkgs/applications/science/biology/obitools/obitools3.nix
index 55a9612c62d0..082a779e12bf 100644
--- a/pkgs/applications/science/biology/obitools/obitools3.nix
+++ b/pkgs/applications/science/biology/obitools/obitools3.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, python3Packages, cmake, python3 }:
+{ lib, fetchurl, python3Packages, cmake, python3 }:
 
 let
   pythonPackages = python3Packages;
diff --git a/pkgs/applications/science/biology/poretools/default.nix b/pkgs/applications/science/biology/poretools/default.nix
index 454843e2f324..b2cefefb5cb5 100755
--- a/pkgs/applications/science/biology/poretools/default.nix
+++ b/pkgs/applications/science/biology/poretools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, pythonPackages, fetchFromGitHub }:
+{ lib, pythonPackages, fetchFromGitHub }:
 
 pythonPackages.buildPythonPackage rec {
   pname = "poretools";
diff --git a/pkgs/applications/science/biology/tebreak/default.nix b/pkgs/applications/science/biology/tebreak/default.nix
index b70ac29e38f7..cb606a6b3463 100644
--- a/pkgs/applications/science/biology/tebreak/default.nix
+++ b/pkgs/applications/science/biology/tebreak/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, last, exonerate, minia, python3Packages, bwa
+{ lib, fetchFromGitHub, last, exonerate, minia, python3Packages, bwa
 , samtools, findutils, python }:
 
 python3Packages.buildPythonApplication rec {
diff --git a/pkgs/applications/science/chemistry/d-seams/default.nix b/pkgs/applications/science/chemistry/d-seams/default.nix
index cbe73bb7edc2..f5e21db4b55a 100644
--- a/pkgs/applications/science/chemistry/d-seams/default.nix
+++ b/pkgs/applications/science/chemistry/d-seams/default.nix
@@ -1,4 +1,4 @@
-{ clangStdenv, stdenv, fetchFromGitHub, catch2, rang, fmt, libyamlcpp, cmake
+{ clangStdenv, fetchFromGitHub, catch2, rang, fmt, libyamlcpp, cmake
 , eigen, lua, luaPackages, liblapack, blas, lib, boost, gsl }:
 
 clangStdenv.mkDerivation rec {
diff --git a/pkgs/applications/science/chemistry/pymol/default.nix b/pkgs/applications/science/chemistry/pymol/default.nix
index 474986901225..2df8b0e6d473 100644
--- a/pkgs/applications/science/chemistry/pymol/default.nix
+++ b/pkgs/applications/science/chemistry/pymol/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, fetchFromGitHub, makeDesktopItem
+{ lib, fetchurl, fetchFromGitHub, makeDesktopItem
 , python3, python3Packages
 , glew, glm, freeglut, libpng, libxml2, tk, freetype, msgpack }:
 
diff --git a/pkgs/applications/science/electronics/caneda/default.nix b/pkgs/applications/science/electronics/caneda/default.nix
index 14c654bd6978..6a9a491af1ee 100644
--- a/pkgs/applications/science/electronics/caneda/default.nix
+++ b/pkgs/applications/science/electronics/caneda/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchFromGitHub, cmake, qtbase, qttools, qtsvg, qwt }:
+{ mkDerivation, lib, fetchFromGitHub, cmake, qtbase, qttools, qtsvg, qwt }:
 
 mkDerivation rec {
   pname = "caneda";
diff --git a/pkgs/applications/science/electronics/fritzing/default.nix b/pkgs/applications/science/electronics/fritzing/default.nix
index b25f76800e87..79c01d3ec718 100644
--- a/pkgs/applications/science/electronics/fritzing/default.nix
+++ b/pkgs/applications/science/electronics/fritzing/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchpatch, fetchFromGitHub, qmake, pkg-config
+{ mkDerivation, lib, fetchpatch, fetchFromGitHub, qmake, pkg-config
 , qtbase, qtsvg, qttools, qtserialport, boost, libgit2
 }:
 
diff --git a/pkgs/applications/science/logic/petrinizer/default.nix b/pkgs/applications/science/logic/petrinizer/default.nix
index 5118795978d1..38039f61fda6 100644
--- a/pkgs/applications/science/logic/petrinizer/default.nix
+++ b/pkgs/applications/science/logic/petrinizer/default.nix
@@ -1,6 +1,6 @@
 { mkDerivation, callPackage, buildPackages
 , async, base, bytestring, containers, fetchFromGitLab, mtl
-, parallel-io, parsec, lib, stdenv, stm, transformers
+, parallel-io, parsec, lib, stm, transformers
 }:
 let
   z3 = callPackage ./z3.nix { gomp = null; z3 = buildPackages.z3; };
diff --git a/pkgs/applications/science/logic/petrinizer/sbv-7.13.nix b/pkgs/applications/science/logic/petrinizer/sbv-7.13.nix
index 96e216417df1..f0c8dd249048 100644
--- a/pkgs/applications/science/logic/petrinizer/sbv-7.13.nix
+++ b/pkgs/applications/science/logic/petrinizer/sbv-7.13.nix
@@ -1,7 +1,7 @@
 { mkDerivation, array, async, base, bytestring, containers
 , crackNum, deepseq, directory, doctest, filepath, generic-deriving
 , ghc, Glob, hlint, mtl, pretty, process, QuickCheck, random
-, lib, stdenv, syb, tasty, tasty-golden, tasty-hunit, tasty-quickcheck
+, lib, syb, tasty, tasty-golden, tasty-hunit, tasty-quickcheck
 , template-haskell, time, z3
 }:
 mkDerivation {
diff --git a/pkgs/applications/science/logic/petrinizer/z3.nix b/pkgs/applications/science/logic/petrinizer/z3.nix
index 3574954c376c..a20ccea16dc7 100644
--- a/pkgs/applications/science/logic/petrinizer/z3.nix
+++ b/pkgs/applications/science/logic/petrinizer/z3.nix
@@ -1,5 +1,5 @@
 { mkDerivation, fetchpatch
-, base, containers, gomp, hspec, QuickCheck, lib, stdenv
+, base, containers, gomp, hspec, QuickCheck, lib
 , transformers, z3
 }:
 mkDerivation {
diff --git a/pkgs/applications/science/machine-learning/labelimg/default.nix b/pkgs/applications/science/machine-learning/labelimg/default.nix
index 4bfd4b9421f6..50d0aa6f9d1d 100644
--- a/pkgs/applications/science/machine-learning/labelimg/default.nix
+++ b/pkgs/applications/science/machine-learning/labelimg/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, fetchFromGitHub, qt5 }:
+{ lib, python3Packages, fetchFromGitHub, qt5 }:
   python3Packages.buildPythonApplication rec {
     pname = "labelImg";
     version = "1.8.3";
diff --git a/pkgs/applications/science/math/almonds/default.nix b/pkgs/applications/science/math/almonds/default.nix
index 7271b6d8755c..ec3891667c58 100644
--- a/pkgs/applications/science/math/almonds/default.nix
+++ b/pkgs/applications/science/math/almonds/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3, fetchFromGitHub, ncurses }:
+{ lib, python3, fetchFromGitHub, ncurses }:
 
 with python3.pkgs; buildPythonApplication rec {
   pname = "almonds";
diff --git a/pkgs/applications/science/math/cemu/default.nix b/pkgs/applications/science/math/cemu/default.nix
index cc8c3514a0b7..9d56ac70d921 100644
--- a/pkgs/applications/science/math/cemu/default.nix
+++ b/pkgs/applications/science/math/cemu/default.nix
@@ -1,5 +1,5 @@
 { fetchFromGitHub
-, lib, stdenv
+, lib
 , mkDerivation
 , SDL2
 , libGL
diff --git a/pkgs/applications/science/misc/rink/default.nix b/pkgs/applications/science/misc/rink/default.nix
index 5670969e7a2d..4f0d1eae4872 100644
--- a/pkgs/applications/science/misc/rink/default.nix
+++ b/pkgs/applications/science/misc/rink/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform, openssl, pkg-config, ncurses }:
+{ lib, fetchFromGitHub, rustPlatform, openssl, pkg-config, ncurses }:
 
 rustPlatform.buildRustPackage rec {
   version = "0.5.1";
diff --git a/pkgs/applications/science/misc/snakemake/default.nix b/pkgs/applications/science/misc/snakemake/default.nix
index 6b3c405a9ac2..edf26f7ec230 100644
--- a/pkgs/applications/science/misc/snakemake/default.nix
+++ b/pkgs/applications/science/misc/snakemake/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages }:
+{ lib, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   pname = "snakemake";
diff --git a/pkgs/applications/terminal-emulators/guake/default.nix b/pkgs/applications/terminal-emulators/guake/default.nix
index 77a052a4f1d6..62cb6707c1b2 100644
--- a/pkgs/applications/terminal-emulators/guake/default.nix
+++ b/pkgs/applications/terminal-emulators/guake/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , python3
 , glibcLocales
diff --git a/pkgs/applications/terminal-emulators/terminator/default.nix b/pkgs/applications/terminal-emulators/terminator/default.nix
index 80698c56cde7..433e5c306180 100644
--- a/pkgs/applications/terminal-emulators/terminator/default.nix
+++ b/pkgs/applications/terminal-emulators/terminator/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , python3
 , keybinder3
diff --git a/pkgs/applications/version-management/git-and-tools/bump2version/default.nix b/pkgs/applications/version-management/git-and-tools/bump2version/default.nix
index 393edc57dcc8..47d31d6c18f6 100644
--- a/pkgs/applications/version-management/git-and-tools/bump2version/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/bump2version/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonApplication, fetchFromGitHub, isPy27, pytest, testfixtures, lib }:
+{ buildPythonApplication, fetchFromGitHub, isPy27, pytest, testfixtures, lib }:
 
 buildPythonApplication rec {
   pname = "bump2version";
diff --git a/pkgs/applications/version-management/git-and-tools/ghorg/default.nix b/pkgs/applications/version-management/git-and-tools/ghorg/default.nix
index b038e98e2dba..4bfe06fee747 100644
--- a/pkgs/applications/version-management/git-and-tools/ghorg/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/ghorg/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "ghorg";
diff --git a/pkgs/applications/version-management/git-and-tools/ghq/default.nix b/pkgs/applications/version-management/git-and-tools/ghq/default.nix
index c6fbf3b9569c..f56ce386e42b 100644
--- a/pkgs/applications/version-management/git-and-tools/ghq/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/ghq/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "ghq";
diff --git a/pkgs/applications/version-management/git-and-tools/git-annex-metadata-gui/default.nix b/pkgs/applications/version-management/git-and-tools/git-annex-metadata-gui/default.nix
index 1908b7539243..4d57820c84eb 100644
--- a/pkgs/applications/version-management/git-and-tools/git-annex-metadata-gui/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/git-annex-metadata-gui/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonApplication, fetchFromGitHub, pyqt5, qt5, git-annex-adapter }:
+{ lib, buildPythonApplication, fetchFromGitHub, pyqt5, qt5, git-annex-adapter }:
 
 buildPythonApplication rec {
   pname = "git-annex-metadata-gui";
diff --git a/pkgs/applications/version-management/git-and-tools/git-annex-remote-b2/default.nix b/pkgs/applications/version-management/git-and-tools/git-annex-remote-b2/default.nix
index 95e583585f19..6d3b65547330 100644
--- a/pkgs/applications/version-management/git-and-tools/git-annex-remote-b2/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/git-annex-remote-b2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   pname = "git-annex-remote-b2";
diff --git a/pkgs/applications/version-management/git-and-tools/git-appraise/default.nix b/pkgs/applications/version-management/git-and-tools/git-appraise/default.nix
index ba4cd42d29dd..33580712932c 100644
--- a/pkgs/applications/version-management/git-and-tools/git-appraise/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/git-appraise/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "git-appraise-unstable";
diff --git a/pkgs/applications/version-management/git-and-tools/git-big-picture/default.nix b/pkgs/applications/version-management/git-and-tools/git-big-picture/default.nix
index ec832866c717..5f84d4235734 100644
--- a/pkgs/applications/version-management/git-and-tools/git-big-picture/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/git-big-picture/default.nix
@@ -1,4 +1,4 @@
-{ fetchFromGitHub, python3Packages, lib, stdenv, git, graphviz }:
+{ fetchFromGitHub, python3Packages, lib, git, graphviz }:
 
 python3Packages.buildPythonApplication rec {
   pname = "git-big-picture";
diff --git a/pkgs/applications/version-management/git-and-tools/git-bug/default.nix b/pkgs/applications/version-management/git-and-tools/git-bug/default.nix
index 9ca5c707b5ce..7a24fe8e0359 100644
--- a/pkgs/applications/version-management/git-and-tools/git-bug/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/git-bug/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "git-bug";
diff --git a/pkgs/applications/version-management/git-and-tools/git-cola/default.nix b/pkgs/applications/version-management/git-and-tools/git-cola/default.nix
index e7e0e009d112..5e105ad9dd3a 100644
--- a/pkgs/applications/version-management/git-and-tools/git-cola/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/git-cola/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages, gettext, git, qt5 }:
+{ lib, fetchFromGitHub, python3Packages, gettext, git, qt5 }:
 
 let
   inherit (python3Packages) buildPythonApplication pyqt5 sip pyinotify;
diff --git a/pkgs/applications/version-management/git-and-tools/git-fame/default.nix b/pkgs/applications/version-management/git-and-tools/git-fame/default.nix
index 216a1035c72b..4dc9c4f8453d 100644
--- a/pkgs/applications/version-management/git-and-tools/git-fame/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/git-fame/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, bundlerEnv, ruby, bundlerUpdateScript }:
+{ lib, bundlerEnv, ruby, bundlerUpdateScript }:
 
 bundlerEnv {
   inherit ruby;
diff --git a/pkgs/applications/version-management/git-and-tools/git-remote-hg/default.nix b/pkgs/applications/version-management/git-and-tools/git-remote-hg/default.nix
index dd4e6e011a6e..69689a49a929 100644
--- a/pkgs/applications/version-management/git-and-tools/git-remote-hg/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/git-remote-hg/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, python3Packages
+{ lib, fetchFromGitHub, python3Packages
 , asciidoc, xmlto, docbook_xsl, docbook_xml_dtd_45, libxslt, libxml2
 }:
 
diff --git a/pkgs/applications/version-management/git-and-tools/git-vanity-hash/default.nix b/pkgs/applications/version-management/git-and-tools/git-vanity-hash/default.nix
index 77e077436169..85a84103118d 100644
--- a/pkgs/applications/version-management/git-and-tools/git-vanity-hash/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/git-vanity-hash/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage rec {
   pname = "git-vanity-hash";
diff --git a/pkgs/applications/version-management/git-and-tools/gitbatch/default.nix b/pkgs/applications/version-management/git-and-tools/gitbatch/default.nix
index dc853be6772e..25f7e95d184f 100644
--- a/pkgs/applications/version-management/git-and-tools/gitbatch/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/gitbatch/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "gitbatch-unstable";
diff --git a/pkgs/applications/version-management/git-and-tools/gitin/default.nix b/pkgs/applications/version-management/git-and-tools/gitin/default.nix
index e2aaafea2024..3d429b7c561c 100644
--- a/pkgs/applications/version-management/git-and-tools/gitin/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/gitin/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildGoPackage
 , fetchFromGitHub
 , pkg-config
diff --git a/pkgs/applications/version-management/git-and-tools/gitweb/default.nix b/pkgs/applications/version-management/git-and-tools/gitweb/default.nix
index 6f5ce3358a3a..1fa2ebc6f74a 100644
--- a/pkgs/applications/version-management/git-and-tools/gitweb/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/gitweb/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildEnv, git, fetchFromGitHub
+{ lib, buildEnv, git, fetchFromGitHub
 , gitwebTheme ? false }:
 
 let
diff --git a/pkgs/applications/version-management/git-and-tools/grv/default.nix b/pkgs/applications/version-management/git-and-tools/grv/default.nix
index 041034651894..e43c602d6d91 100644
--- a/pkgs/applications/version-management/git-and-tools/grv/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/grv/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, curl, ncurses, pkg-config, readline
+{ lib, buildGoPackage, fetchFromGitHub, curl, ncurses, pkg-config, readline
 , cmake }:
 let
   version = "0.3.2";
diff --git a/pkgs/applications/version-management/git-and-tools/hub/default.nix b/pkgs/applications/version-management/git-and-tools/hub/default.nix
index 4b189c55c8a8..e0d7e46d22a5 100644
--- a/pkgs/applications/version-management/git-and-tools/hub/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/hub/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, git, groff, installShellFiles, util-linux, nixosTests }:
+{ lib, buildGoPackage, fetchFromGitHub, git, groff, installShellFiles, util-linux, nixosTests }:
 
 buildGoPackage rec {
   pname = "hub";
diff --git a/pkgs/applications/version-management/git-and-tools/lefthook/default.nix b/pkgs/applications/version-management/git-and-tools/lefthook/default.nix
index ce7493088430..18f2e5ad4871 100644
--- a/pkgs/applications/version-management/git-and-tools/lefthook/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/lefthook/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 # Currently `buildGo114Module` is passed as `buildGoModule` from
 # `../default.nix`. Please remove the fixed 1.14 once a new release has been
diff --git a/pkgs/applications/version-management/git-and-tools/pass-git-helper/default.nix b/pkgs/applications/version-management/git-and-tools/pass-git-helper/default.nix
index 5feb71c79317..1821dba0f006 100644
--- a/pkgs/applications/version-management/git-and-tools/pass-git-helper/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/pass-git-helper/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonApplication, fetchFromGitHub, pyxdg, pytest, pytest-mock }:
+{ lib, buildPythonApplication, fetchFromGitHub, pyxdg, pytest, pytest-mock }:
 
 buildPythonApplication rec {
   pname   = "pass-git-helper";
diff --git a/pkgs/applications/version-management/git-and-tools/scmpuff/default.nix b/pkgs/applications/version-management/git-and-tools/scmpuff/default.nix
index 69062d305b7a..1e65834f5193 100644
--- a/pkgs/applications/version-management/git-and-tools/scmpuff/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/scmpuff/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "scmpuff";
diff --git a/pkgs/applications/version-management/git-and-tools/stgit/default.nix b/pkgs/applications/version-management/git-and-tools/stgit/default.nix
index 3a37c798a085..4ee92c1d5e6a 100644
--- a/pkgs/applications/version-management/git-and-tools/stgit/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/stgit/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, fetchFromGitHub, git, installShellFiles }:
+{ lib, python3Packages, fetchFromGitHub, git, installShellFiles }:
 
 python3Packages.buildPythonApplication rec {
   pname = "stgit";
diff --git a/pkgs/applications/version-management/git-crecord/default.nix b/pkgs/applications/version-management/git-crecord/default.nix
index 3b906e4dc2e0..5dc75ce4d702 100644
--- a/pkgs/applications/version-management/git-crecord/default.nix
+++ b/pkgs/applications/version-management/git-crecord/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, pythonPackages }:
+{ lib, fetchFromGitHub, pythonPackages }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "git-crecord";
diff --git a/pkgs/applications/version-management/git-lfs/1.nix b/pkgs/applications/version-management/git-lfs/1.nix
index 3c758908cd49..f72f51907500 100644
--- a/pkgs/applications/version-management/git-lfs/1.nix
+++ b/pkgs/applications/version-management/git-lfs/1.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "git-lfs";
diff --git a/pkgs/applications/version-management/git-up/default.nix b/pkgs/applications/version-management/git-up/default.nix
index 57a40de9d4a4..06a2bb48989c 100644
--- a/pkgs/applications/version-management/git-up/default.nix
+++ b/pkgs/applications/version-management/git-up/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, pythonPackages, git }:
+{ lib, fetchurl, pythonPackages, git }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "git-up";
diff --git a/pkgs/applications/version-management/gitea/default.nix b/pkgs/applications/version-management/gitea/default.nix
index 68b3a3e9099a..f2d258ea1aff 100644
--- a/pkgs/applications/version-management/gitea/default.nix
+++ b/pkgs/applications/version-management/gitea/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchurl, makeWrapper
+{ lib, buildGoPackage, fetchurl, makeWrapper
 , git, bash, gzip, openssh, pam
 , sqliteSupport ? true
 , pamSupport ? true
diff --git a/pkgs/applications/version-management/gitinspector/default.nix b/pkgs/applications/version-management/gitinspector/default.nix
index 68dd3c190bec..384f5d0f01f7 100644
--- a/pkgs/applications/version-management/gitinspector/default.nix
+++ b/pkgs/applications/version-management/gitinspector/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchzip, python2Packages}:
+{ lib, fetchzip, python2Packages}:
 
 python2Packages.buildPythonApplication rec {
   pname = "gitinspector";
diff --git a/pkgs/applications/version-management/gitlab/gitaly/default.nix b/pkgs/applications/version-management/gitlab/gitaly/default.nix
index acfd91be331b..d61c97f9bb1e 100644
--- a/pkgs/applications/version-management/gitlab/gitaly/default.nix
+++ b/pkgs/applications/version-management/gitlab/gitaly/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitLab, fetchFromGitHub, buildGoModule, ruby
+{ lib, fetchFromGitLab, fetchFromGitHub, buildGoModule, ruby
 , bundlerEnv, pkg-config
 # libgit2 + dependencies
 , libgit2, openssl, zlib, pcre, http-parser }:
diff --git a/pkgs/applications/version-management/gitlab/gitlab-shell/default.nix b/pkgs/applications/version-management/gitlab/gitlab-shell/default.nix
index d1b5958c751d..a1a9df57f044 100644
--- a/pkgs/applications/version-management/gitlab/gitlab-shell/default.nix
+++ b/pkgs/applications/version-management/gitlab/gitlab-shell/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitLab, buildGoModule, ruby }:
+{ lib, fetchFromGitLab, buildGoModule, ruby }:
 
 buildGoModule rec {
   pname = "gitlab-shell";
diff --git a/pkgs/applications/version-management/gitlab/gitlab-workhorse/default.nix b/pkgs/applications/version-management/gitlab/gitlab-workhorse/default.nix
index b38485716d7d..883753616c99 100644
--- a/pkgs/applications/version-management/gitlab/gitlab-workhorse/default.nix
+++ b/pkgs/applications/version-management/gitlab/gitlab-workhorse/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitLab, git, buildGoModule }:
+{ lib, fetchFromGitLab, git, buildGoModule }:
 
 buildGoModule rec {
   pname = "gitlab-workhorse";
diff --git a/pkgs/applications/version-management/gitless/default.nix b/pkgs/applications/version-management/gitless/default.nix
index e53da902e138..310158e3eeae 100644
--- a/pkgs/applications/version-management/gitless/default.nix
+++ b/pkgs/applications/version-management/gitless/default.nix
@@ -1,4 +1,4 @@
-{ fetchFromGitHub, python, lib, stdenv }:
+{ fetchFromGitHub, python, lib }:
 
 with python.pkgs;
 buildPythonApplication rec {
diff --git a/pkgs/applications/version-management/gogs/default.nix b/pkgs/applications/version-management/gogs/default.nix
index fed2fd9ea338..c0b0021f8cbe 100644
--- a/pkgs/applications/version-management/gogs/default.nix
+++ b/pkgs/applications/version-management/gogs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, makeWrapper
+{ lib, buildGoModule, fetchFromGitHub, makeWrapper
 , git, bash, gzip, openssh, pam
 , sqliteSupport ? true
 , pamSupport ? true
diff --git a/pkgs/applications/version-management/meld/default.nix b/pkgs/applications/version-management/meld/default.nix
index 4f94e2926c4a..268098b2d2d0 100644
--- a/pkgs/applications/version-management/meld/default.nix
+++ b/pkgs/applications/version-management/meld/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchurl
 , gettext
 , itstool
diff --git a/pkgs/applications/version-management/nitpick/default.nix b/pkgs/applications/version-management/nitpick/default.nix
index ba1f3bbb93b7..56d3531f7219 100644
--- a/pkgs/applications/version-management/nitpick/default.nix
+++ b/pkgs/applications/version-management/nitpick/default.nix
@@ -1,6 +1,6 @@
 { fetchFromGitHub
 , buildPythonPackage
-, lib, stdenv
+, lib
 , isPy27
 }:
 
diff --git a/pkgs/applications/version-management/peru/default.nix b/pkgs/applications/version-management/peru/default.nix
index d7ad9060879e..b7b6d62e4b4c 100644
--- a/pkgs/applications/version-management/peru/default.nix
+++ b/pkgs/applications/version-management/peru/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   pname = "peru";
diff --git a/pkgs/applications/version-management/sourcehut/builds.nix b/pkgs/applications/version-management/sourcehut/builds.nix
index 200d1d5384fb..3e89fe0a4dc2 100644
--- a/pkgs/applications/version-management/sourcehut/builds.nix
+++ b/pkgs/applications/version-management/sourcehut/builds.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit, buildPythonPackage
+{ lib, fetchgit, buildPythonPackage
 , python
 , buildGoModule
 , srht, redis, celery, pyyaml, markdown }:
diff --git a/pkgs/applications/version-management/sourcehut/core.nix b/pkgs/applications/version-management/sourcehut/core.nix
index bcc47920ebeb..69f8a7d4e458 100644
--- a/pkgs/applications/version-management/sourcehut/core.nix
+++ b/pkgs/applications/version-management/sourcehut/core.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit, fetchNodeModules, buildPythonPackage
+{ lib, fetchgit, fetchNodeModules, buildPythonPackage
 , pgpy, flask, bleach, humanize, html5lib, markdown, psycopg2, pygments
 , requests, sqlalchemy, cryptography, beautifulsoup4, sqlalchemy-utils, prometheus_client
 , celery, alembic, importlib-metadata, mistletoe
diff --git a/pkgs/applications/version-management/sourcehut/dispatch.nix b/pkgs/applications/version-management/sourcehut/dispatch.nix
index c7c11cafc8b4..ea3f58e38906 100644
--- a/pkgs/applications/version-management/sourcehut/dispatch.nix
+++ b/pkgs/applications/version-management/sourcehut/dispatch.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit, buildPythonPackage
+{ lib, fetchgit, buildPythonPackage
 , python
 , srht, pyyaml, PyGithub }:
 
diff --git a/pkgs/applications/version-management/sourcehut/git.nix b/pkgs/applications/version-management/sourcehut/git.nix
index 3ef49b796645..8966cbe08001 100644
--- a/pkgs/applications/version-management/sourcehut/git.nix
+++ b/pkgs/applications/version-management/sourcehut/git.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit, buildPythonPackage
+{ lib, fetchgit, buildPythonPackage
 , python
 , buildGoModule
 , srht, minio, pygit2, scmsrht }:
diff --git a/pkgs/applications/version-management/sourcehut/hg.nix b/pkgs/applications/version-management/sourcehut/hg.nix
index d0e140908469..fae311831f2f 100644
--- a/pkgs/applications/version-management/sourcehut/hg.nix
+++ b/pkgs/applications/version-management/sourcehut/hg.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchhg, buildPythonPackage
+{ lib, fetchhg, buildPythonPackage
 , python
 , srht, hglib, scmsrht, unidiff }:
 
diff --git a/pkgs/applications/version-management/sourcehut/hub.nix b/pkgs/applications/version-management/sourcehut/hub.nix
index 8ea4961e7d45..99b5663a9b89 100644
--- a/pkgs/applications/version-management/sourcehut/hub.nix
+++ b/pkgs/applications/version-management/sourcehut/hub.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit, buildPythonPackage
+{ lib, fetchgit, buildPythonPackage
 , python
 , srht }:
 
diff --git a/pkgs/applications/version-management/sourcehut/lists.nix b/pkgs/applications/version-management/sourcehut/lists.nix
index a0b52a2d5640..25d22dede359 100644
--- a/pkgs/applications/version-management/sourcehut/lists.nix
+++ b/pkgs/applications/version-management/sourcehut/lists.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit, buildPythonPackage
+{ lib, fetchgit, buildPythonPackage
 , python
 , srht, asyncpg, aiosmtpd, pygit2, emailthreads }:
 
diff --git a/pkgs/applications/version-management/sourcehut/man.nix b/pkgs/applications/version-management/sourcehut/man.nix
index 26939d2bebec..24a31a3ef17f 100644
--- a/pkgs/applications/version-management/sourcehut/man.nix
+++ b/pkgs/applications/version-management/sourcehut/man.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit, buildPythonPackage
+{ lib, fetchgit, buildPythonPackage
 , python
 , srht, pygit2 }:
 
diff --git a/pkgs/applications/version-management/sourcehut/meta.nix b/pkgs/applications/version-management/sourcehut/meta.nix
index b6622d97487e..d07bd29357ac 100644
--- a/pkgs/applications/version-management/sourcehut/meta.nix
+++ b/pkgs/applications/version-management/sourcehut/meta.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit, buildPythonPackage
+{ lib, fetchgit, buildPythonPackage
 , python
 , buildGoModule
 , pgpy, srht, redis, bcrypt, qrcode, stripe, zxcvbn, alembic, pystache
diff --git a/pkgs/applications/version-management/sourcehut/paste.nix b/pkgs/applications/version-management/sourcehut/paste.nix
index eaec8b710dd6..12747f981032 100644
--- a/pkgs/applications/version-management/sourcehut/paste.nix
+++ b/pkgs/applications/version-management/sourcehut/paste.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit, buildPythonPackage
+{ lib, fetchgit, buildPythonPackage
 , python
 , srht, pyyaml }:
 
diff --git a/pkgs/applications/version-management/sourcehut/scm.nix b/pkgs/applications/version-management/sourcehut/scm.nix
index 6e8b03835bc4..615716d03afd 100644
--- a/pkgs/applications/version-management/sourcehut/scm.nix
+++ b/pkgs/applications/version-management/sourcehut/scm.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit, buildPythonPackage
+{ lib, fetchgit, buildPythonPackage
 , srht, redis, pyyaml, buildsrht
 , writeText }:
 
diff --git a/pkgs/applications/version-management/sourcehut/todo.nix b/pkgs/applications/version-management/sourcehut/todo.nix
index 357dcd4d2e2a..85ae3b2cf146 100644
--- a/pkgs/applications/version-management/sourcehut/todo.nix
+++ b/pkgs/applications/version-management/sourcehut/todo.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit, buildPythonPackage
+{ lib, fetchgit, buildPythonPackage
 , python
 , srht, redis, alembic, pystache
 , pytest, factory_boy, writeText }:
diff --git a/pkgs/applications/video/clipgrab/default.nix b/pkgs/applications/video/clipgrab/default.nix
index c1701dd51748..6db2450d1365 100644
--- a/pkgs/applications/video/clipgrab/default.nix
+++ b/pkgs/applications/video/clipgrab/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, makeDesktopItem, ffmpeg_3
+{ lib, fetchurl, makeDesktopItem, ffmpeg_3
 , qmake, qttools, mkDerivation
 , qtbase, qtdeclarative, qtlocation, qtquickcontrols2, qtwebchannel, qtwebengine
 }:
diff --git a/pkgs/applications/video/devede/default.nix b/pkgs/applications/video/devede/default.nix
index 4b1b7ae0b602..6a4d0dc1b8df 100644
--- a/pkgs/applications/video/devede/default.nix
+++ b/pkgs/applications/video/devede/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitLab, python3Packages, ffmpeg_3, mplayer, vcdimager, cdrkit, dvdauthor
+{ lib, fetchFromGitLab, python3Packages, ffmpeg_3, mplayer, vcdimager, cdrkit, dvdauthor
 , gtk3, gettext, wrapGAppsHook, gdk-pixbuf, gobject-introspection }:
 
 let
diff --git a/pkgs/applications/video/electronplayer/electronplayer.nix b/pkgs/applications/video/electronplayer/electronplayer.nix
index a4ebbf159b88..15f5b60a09a6 100644
--- a/pkgs/applications/video/electronplayer/electronplayer.nix
+++ b/pkgs/applications/video/electronplayer/electronplayer.nix
@@ -1,4 +1,4 @@
-{ appimageTools, lib, stdenv, fetchurl }:
+{ appimageTools, lib, fetchurl }:
 let
   pname = "electronplayer";
   version = "2.0.8";
diff --git a/pkgs/applications/video/jellyfin-mpv-shim/default.nix b/pkgs/applications/video/jellyfin-mpv-shim/default.nix
index fe06e9431f9d..6dc42a47685b 100644
--- a/pkgs/applications/video/jellyfin-mpv-shim/default.nix
+++ b/pkgs/applications/video/jellyfin-mpv-shim/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonApplication, fetchFromGitHub, callPackage
+{ lib, buildPythonApplication, fetchFromGitHub, callPackage
 , mpv, python-mpv-jsonipc, jellyfin-apiclient-python
 , pillow, tkinter, pystray, jinja2, pywebview }:
 
diff --git a/pkgs/applications/video/kazam/default.nix b/pkgs/applications/video/kazam/default.nix
index e6e971ad4387..35b7d173257f 100644
--- a/pkgs/applications/video/kazam/default.nix
+++ b/pkgs/applications/video/kazam/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, substituteAll, python3, gst_all_1, wrapGAppsHook, gobject-introspection
+{ lib, fetchurl, substituteAll, python3, gst_all_1, wrapGAppsHook, gobject-introspection
 , gtk3, libwnck3, keybinder3, intltool, libcanberra-gtk3, libappindicator-gtk3, libpulseaudio
 , fetchpatch }:
 
diff --git a/pkgs/applications/video/kodi/wrapper.nix b/pkgs/applications/video/kodi/wrapper.nix
index 6bec8f9c8912..80a36df3de74 100644
--- a/pkgs/applications/video/kodi/wrapper.nix
+++ b/pkgs/applications/video/kodi/wrapper.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, makeWrapper, buildEnv, kodi, plugins }:
+{ lib, makeWrapper, buildEnv, kodi, plugins }:
 
 let
   drvName = builtins.parseDrvName kodi.name;
diff --git a/pkgs/applications/video/makemkv/default.nix b/pkgs/applications/video/makemkv/default.nix
index 29676abb755e..cec6468c43be 100644
--- a/pkgs/applications/video/makemkv/default.nix
+++ b/pkgs/applications/video/makemkv/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , mkDerivation
 , fetchurl
 , autoPatchelfHook
diff --git a/pkgs/applications/video/mythtv/default.nix b/pkgs/applications/video/mythtv/default.nix
index a58c32dc563e..236aec2ee563 100644
--- a/pkgs/applications/video/mythtv/default.nix
+++ b/pkgs/applications/video/mythtv/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, which, qtbase, qtwebkit, qtscript, xlibsWrapper
+{ lib, mkDerivation, fetchFromGitHub, which, qtbase, qtwebkit, qtscript, xlibsWrapper
 , libpulseaudio, fftwSinglePrec , lame, zlib, libGLU, libGL, alsaLib, freetype
 , perl, pkg-config , libsamplerate, libbluray, lzo, libX11, libXv, libXrandr, libXvMC, libXinerama, libXxf86vm
 , libXmu , yasm, libuuid, taglib, libtool, autoconf, automake, file, exiv2, linuxHeaders
diff --git a/pkgs/applications/video/pitivi/default.nix b/pkgs/applications/video/pitivi/default.nix
index 1b2af7614ab0..e388d5a67fe6 100644
--- a/pkgs/applications/video/pitivi/default.nix
+++ b/pkgs/applications/video/pitivi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , fetchurl
 , pkg-config
diff --git a/pkgs/applications/video/plex-media-player/default.nix b/pkgs/applications/video/plex-media-player/default.nix
index e690c5070243..e7a735f167c8 100644
--- a/pkgs/applications/video/plex-media-player/default.nix
+++ b/pkgs/applications/video/plex-media-player/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, fetchurl, pkg-config, cmake, python3, mkDerivation
+{ lib, fetchFromGitHub, fetchurl, pkg-config, cmake, python3, mkDerivation
 , libX11, libXrandr, qtbase, qtwebchannel, qtwebengine, qtx11extras
 , libvdpau, SDL2, mpv, libGL }:
 let
diff --git a/pkgs/applications/video/plex-mpv-shim/default.nix b/pkgs/applications/video/plex-mpv-shim/default.nix
index 7738dd99d215..d0904790a9e8 100644
--- a/pkgs/applications/video/plex-mpv-shim/default.nix
+++ b/pkgs/applications/video/plex-mpv-shim/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonApplication, fetchFromGitHub, mpv, requests, python-mpv-jsonipc }:
+{ lib, buildPythonApplication, fetchFromGitHub, mpv, requests, python-mpv-jsonipc }:
 
 buildPythonApplication rec {
   pname = "plex-mpv-shim";
diff --git a/pkgs/applications/video/pyca/default.nix b/pkgs/applications/video/pyca/default.nix
index bf54c0a2d6cc..df42bbec156f 100644
--- a/pkgs/applications/video/pyca/default.nix
+++ b/pkgs/applications/video/pyca/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonApplication, fetchFromGitHub, pycurl, dateutil, configobj, sqlalchemy, sdnotify, flask }:
+{ lib, buildPythonApplication, fetchFromGitHub, pycurl, dateutil, configobj, sqlalchemy, sdnotify, flask }:
 
 buildPythonApplication rec {
   pname = "pyca";
diff --git a/pkgs/applications/video/qmediathekview/default.nix b/pkgs/applications/video/qmediathekview/default.nix
index b05fa113a30f..d0f414135703 100644
--- a/pkgs/applications/video/qmediathekview/default.nix
+++ b/pkgs/applications/video/qmediathekview/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchFromGitHub, qtbase, qttools, xz, boost, qmake, pkg-config }:
+{ mkDerivation, lib, fetchFromGitHub, qtbase, qttools, xz, boost, qmake, pkg-config }:
 
 mkDerivation rec {
   pname = "QMediathekView";
diff --git a/pkgs/applications/video/shotcut/default.nix b/pkgs/applications/video/shotcut/default.nix
index ade4b61931b2..d580d98a6c1d 100644
--- a/pkgs/applications/video/shotcut/default.nix
+++ b/pkgs/applications/video/shotcut/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , fetchpatch
 , mkDerivation
diff --git a/pkgs/applications/video/tartube/default.nix b/pkgs/applications/video/tartube/default.nix
index 3bd48019d0dd..12525da35c40 100644
--- a/pkgs/applications/video/tartube/default.nix
+++ b/pkgs/applications/video/tartube/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , fetchFromGitHub
 , gdk-pixbuf
 , gobject-introspection
diff --git a/pkgs/applications/video/vokoscreen/default.nix b/pkgs/applications/video/vokoscreen/default.nix
index 06e91218cacc..598a162f3998 100644
--- a/pkgs/applications/video/vokoscreen/default.nix
+++ b/pkgs/applications/video/vokoscreen/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, mkDerivation
+{ lib, fetchFromGitHub, mkDerivation
 , pkg-config, qtbase, qttools, qmake, qtmultimedia, qtx11extras, alsaLib, libv4l, libXrandr
 , ffmpeg
 }:
diff --git a/pkgs/applications/virtualization/aqemu/default.nix b/pkgs/applications/virtualization/aqemu/default.nix
index d31523e946ac..2d865f418187 100644
--- a/pkgs/applications/virtualization/aqemu/default.nix
+++ b/pkgs/applications/virtualization/aqemu/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, cmake, fetchFromGitHub, libvncserver, qemu, qtbase, lib, stdenv
+{ mkDerivation, cmake, fetchFromGitHub, libvncserver, qemu, qtbase, lib
 }:
 
 mkDerivation rec {
diff --git a/pkgs/applications/virtualization/cntr/default.nix b/pkgs/applications/virtualization/cntr/default.nix
index f7b7c99b5540..2283b45aee47 100644
--- a/pkgs/applications/virtualization/cntr/default.nix
+++ b/pkgs/applications/virtualization/cntr/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, rustPlatform, fetchFromGitHub }:
+{ lib, rustPlatform, fetchFromGitHub }:
 
 rustPlatform.buildRustPackage rec {
   pname = "cntr";
diff --git a/pkgs/applications/virtualization/cri-o/default.nix b/pkgs/applications/virtualization/cri-o/default.nix
index 388cf328ff51..995053715072 100644
--- a/pkgs/applications/virtualization/cri-o/default.nix
+++ b/pkgs/applications/virtualization/cri-o/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , btrfs-progs
 , buildGoModule
 , fetchFromGitHub
diff --git a/pkgs/applications/virtualization/docker-compose/default.nix b/pkgs/applications/virtualization/docker-compose/default.nix
index 3dabcf57daf3..e4e7a2049348 100644
--- a/pkgs/applications/virtualization/docker-compose/default.nix
+++ b/pkgs/applications/virtualization/docker-compose/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonApplication, fetchPypi, pythonOlder
+{ lib, buildPythonApplication, fetchPypi, pythonOlder
 , installShellFiles
 , mock, pytest, nose
 , pyyaml, backports_ssl_match_hostname, colorama, docopt
diff --git a/pkgs/applications/virtualization/docker-slim/default.nix b/pkgs/applications/virtualization/docker-slim/default.nix
index 6c1ef95cd6f7..59c594268302 100644
--- a/pkgs/applications/virtualization/docker-slim/default.nix
+++ b/pkgs/applications/virtualization/docker-slim/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildGoPackage
 , fetchFromGitHub
 , makeWrapper
diff --git a/pkgs/applications/virtualization/docker/buildx.nix b/pkgs/applications/virtualization/docker/buildx.nix
index 9eb03508572d..84019395853b 100644
--- a/pkgs/applications/virtualization/docker/buildx.nix
+++ b/pkgs/applications/virtualization/docker/buildx.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "docker-buildx";
diff --git a/pkgs/applications/virtualization/docker/distribution.nix b/pkgs/applications/virtualization/docker/distribution.nix
index f41862c0dd15..96722fe393f6 100644
--- a/pkgs/applications/virtualization/docker/distribution.nix
+++ b/pkgs/applications/virtualization/docker/distribution.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "distribution";
diff --git a/pkgs/applications/virtualization/docker/proxy.nix b/pkgs/applications/virtualization/docker/proxy.nix
index 7fd7cda81e23..59fc80eefbf7 100644
--- a/pkgs/applications/virtualization/docker/proxy.nix
+++ b/pkgs/applications/virtualization/docker/proxy.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "docker-proxy-${rev}";
diff --git a/pkgs/applications/virtualization/ecs-agent/default.nix b/pkgs/applications/virtualization/ecs-agent/default.nix
index 41a093153331..390f3049c026 100644
--- a/pkgs/applications/virtualization/ecs-agent/default.nix
+++ b/pkgs/applications/virtualization/ecs-agent/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoPackage }:
+{ lib, fetchFromGitHub, buildGoPackage }:
 
 buildGoPackage rec {
   pname   = "amazon-ecs-agent";
diff --git a/pkgs/applications/virtualization/firectl/default.nix b/pkgs/applications/virtualization/firectl/default.nix
index 0b5fc5dac52b..ac531b36dd21 100644
--- a/pkgs/applications/virtualization/firectl/default.nix
+++ b/pkgs/applications/virtualization/firectl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "firectl";
diff --git a/pkgs/applications/virtualization/gvisor/default.nix b/pkgs/applications/virtualization/gvisor/default.nix
index 2d423911c99b..fd001d598ad4 100644
--- a/pkgs/applications/virtualization/gvisor/default.nix
+++ b/pkgs/applications/virtualization/gvisor/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildBazelPackage
 , fetchFromGitHub
 , cacert
diff --git a/pkgs/applications/virtualization/qtemu/default.nix b/pkgs/applications/virtualization/qtemu/default.nix
index 00dffc385a10..3a5f26bfcc8d 100644
--- a/pkgs/applications/virtualization/qtemu/default.nix
+++ b/pkgs/applications/virtualization/qtemu/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitLab, pkg-config, qmake, qtbase, qemu, makeWrapper }:
+{ lib, mkDerivation, fetchFromGitLab, pkg-config, qmake, qtbase, qemu, makeWrapper }:
 
 mkDerivation rec {
   pname = "qtemu";
diff --git a/pkgs/applications/virtualization/singularity/default.nix b/pkgs/applications/virtualization/singularity/default.nix
index 6961dcf7b893..24b71b461653 100644
--- a/pkgs/applications/virtualization/singularity/default.nix
+++ b/pkgs/applications/virtualization/singularity/default.nix
@@ -1,5 +1,4 @@
-{stdenv
-, lib
+{ lib
 , fetchurl
 , util-linux
 , gpgme
diff --git a/pkgs/applications/virtualization/virt-manager/default.nix b/pkgs/applications/virtualization/virt-manager/default.nix
index 8fe9caf0e570..11ddaff8d3be 100644
--- a/pkgs/applications/virtualization/virt-manager/default.nix
+++ b/pkgs/applications/virtualization/virt-manager/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, python3Packages, intltool, file
+{ lib, fetchurl, python3Packages, intltool, file
 , wrapGAppsHook, gtk-vnc, vte, avahi, dconf
 , gobject-introspection, libvirt-glib, system-libvirt
 , gsettings-desktop-schemas, glib, libosinfo, gnome3
diff --git a/pkgs/applications/virtualization/xen/4.10.nix b/pkgs/applications/virtualization/xen/4.10.nix
index 2f9882dee9b3..bc9003e128a4 100644
--- a/pkgs/applications/virtualization/xen/4.10.nix
+++ b/pkgs/applications/virtualization/xen/4.10.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, callPackage, fetchurl, fetchpatch, fetchgit
+{ lib, callPackage, fetchurl, fetchpatch, fetchgit
 , ocaml-ng
 , withInternalQemu ? true
 , withInternalTraditionalQemu ? true
diff --git a/pkgs/applications/virtualization/xen/packages.nix b/pkgs/applications/virtualization/xen/packages.nix
index 55e3b12c3b7e..5ff263dc8ff2 100644
--- a/pkgs/applications/virtualization/xen/packages.nix
+++ b/pkgs/applications/virtualization/xen/packages.nix
@@ -1,5 +1,5 @@
 { callPackage
-, stdenv
+
 }:
 
 # TODO(@oxij) on new Xen version: generalize this to generate [vanilla slim
diff --git a/pkgs/applications/window-managers/btops/default.nix b/pkgs/applications/window-managers/btops/default.nix
index f0bb26f43e25..5f107337ee44 100644
--- a/pkgs/applications/window-managers/btops/default.nix
+++ b/pkgs/applications/window-managers/btops/default.nix
@@ -1,5 +1,5 @@
 # This file was generated by https://github.com/kamilchm/go2nix v1.2.1
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   pname = "btops";
diff --git a/pkgs/applications/window-managers/dwm/dwm-status.nix b/pkgs/applications/window-managers/dwm/dwm-status.nix
index 1724a2c9824c..d419b0ebe3a8 100644
--- a/pkgs/applications/window-managers/dwm/dwm-status.nix
+++ b/pkgs/applications/window-managers/dwm/dwm-status.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, rustPlatform, fetchFromGitHub, dbus, gdk-pixbuf, libnotify, makeWrapper, pkg-config, xorg
+{ lib, rustPlatform, fetchFromGitHub, dbus, gdk-pixbuf, libnotify, makeWrapper, pkg-config, xorg
 , enableAlsaUtils ? true, alsaUtils, coreutils
 , enableNetwork ? true, dnsutils, iproute, wirelesstools }:
 
diff --git a/pkgs/applications/window-managers/i3/gaps.nix b/pkgs/applications/window-managers/i3/gaps.nix
index 52322d8e1948..1a11d40e3df7 100644
--- a/pkgs/applications/window-managers/i3/gaps.nix
+++ b/pkgs/applications/window-managers/i3/gaps.nix
@@ -1,4 +1,4 @@
-{ fetchurl, lib, stdenv, i3, autoreconfHook }:
+{ fetchurl, lib, i3, autoreconfHook }:
 
 i3.overrideAttrs (oldAttrs : rec {
 
diff --git a/pkgs/applications/window-managers/i3/pystatus.nix b/pkgs/applications/window-managers/i3/pystatus.nix
index 404e7b41f556..bddaab615783 100644
--- a/pkgs/applications/window-managers/i3/pystatus.nix
+++ b/pkgs/applications/window-managers/i3/pystatus.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , libpulseaudio
 , libnotify
diff --git a/pkgs/applications/window-managers/i3/status-rust.nix b/pkgs/applications/window-managers/i3/status-rust.nix
index b9dbe6136b40..be7e88a25019 100644
--- a/pkgs/applications/window-managers/i3/status-rust.nix
+++ b/pkgs/applications/window-managers/i3/status-rust.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , rustPlatform
 , fetchFromGitHub
 , pkg-config
diff --git a/pkgs/applications/window-managers/i3/wk-switch.nix b/pkgs/applications/window-managers/i3/wk-switch.nix
index e7fd87aaf3b8..d0055ef63653 100644
--- a/pkgs/applications/window-managers/i3/wk-switch.nix
+++ b/pkgs/applications/window-managers/i3/wk-switch.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   pname = "i3-wk-switch";
diff --git a/pkgs/applications/window-managers/i3/wmfocus.nix b/pkgs/applications/window-managers/i3/wmfocus.nix
index db6ec29d9e98..9169cfc3817c 100644
--- a/pkgs/applications/window-managers/i3/wmfocus.nix
+++ b/pkgs/applications/window-managers/i3/wmfocus.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform
+{ lib, fetchFromGitHub, rustPlatform
 , xorg, python3, pkg-config, cairo, libxkbcommon }:
 
 rustPlatform.buildRustPackage rec {
diff --git a/pkgs/applications/window-managers/leftwm/default.nix b/pkgs/applications/window-managers/leftwm/default.nix
index 712e9ab22c77..cdef71c965e9 100644
--- a/pkgs/applications/window-managers/leftwm/default.nix
+++ b/pkgs/applications/window-managers/leftwm/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform, libX11, libXinerama, makeWrapper }:
+{ lib, fetchFromGitHub, rustPlatform, libX11, libXinerama, makeWrapper }:
 
 let
     rpath = lib.makeLibraryPath [ libXinerama libX11 ];
diff --git a/pkgs/applications/window-managers/qtile/default.nix b/pkgs/applications/window-managers/qtile/default.nix
index 709a5b147362..21059c25afb1 100644
--- a/pkgs/applications/window-managers/qtile/default.nix
+++ b/pkgs/applications/window-managers/qtile/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python37Packages, glib, cairo, pango, pkg-config, libxcb, xcbutilcursor }:
+{ lib, fetchFromGitHub, python37Packages, glib, cairo, pango, pkg-config, libxcb, xcbutilcursor }:
 
 let cairocffi-xcffib = python37Packages.cairocffi.override {
     withXcffib = true;
diff --git a/pkgs/applications/window-managers/sway/wrapper.nix b/pkgs/applications/window-managers/sway/wrapper.nix
index 0a80ce70e032..319023eb2e5a 100644
--- a/pkgs/applications/window-managers/sway/wrapper.nix
+++ b/pkgs/applications/window-managers/sway/wrapper.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , sway-unwrapped
 , makeWrapper, symlinkJoin, writeShellScriptBin
 , withBaseWrapper ? true, extraSessionCommands ? "", dbus
diff --git a/pkgs/build-support/appimage/default.nix b/pkgs/build-support/appimage/default.nix
index 170c25dffe2d..1613e9dea24b 100644
--- a/pkgs/build-support/appimage/default.nix
+++ b/pkgs/build-support/appimage/default.nix
@@ -1,5 +1,5 @@
 { lib
-, stdenv
+
 , bash
 , binutils-unwrapped
 , coreutils
diff --git a/pkgs/build-support/build-fhs-userenv-bubblewrap/default.nix b/pkgs/build-support/build-fhs-userenv-bubblewrap/default.nix
index b40569a479bc..9a9e5a9ce10a 100644
--- a/pkgs/build-support/build-fhs-userenv-bubblewrap/default.nix
+++ b/pkgs/build-support/build-fhs-userenv-bubblewrap/default.nix
@@ -1,4 +1,4 @@
-{ lib, callPackage, runCommandLocal, writeShellScriptBin, stdenv, coreutils, bubblewrap }:
+{ lib, callPackage, runCommandLocal, writeShellScriptBin, coreutils, bubblewrap }:
 
 args @ {
   name
diff --git a/pkgs/build-support/emacs/trivial.nix b/pkgs/build-support/emacs/trivial.nix
index 396c971b2f01..9a36b44a270d 100644
--- a/pkgs/build-support/emacs/trivial.nix
+++ b/pkgs/build-support/emacs/trivial.nix
@@ -1,6 +1,6 @@
 # trivial builder for Emacs packages
 
-{ lib, stdenv, texinfo, ... }@envargs:
+{ lib, texinfo, ... }@envargs:
 
 with lib;
 
diff --git a/pkgs/build-support/fetchdocker/fetchDockerConfig.nix b/pkgs/build-support/fetchdocker/fetchDockerConfig.nix
index 9fd813bfa575..e8b2403d8f33 100644
--- a/pkgs/build-support/fetchdocker/fetchDockerConfig.nix
+++ b/pkgs/build-support/fetchdocker/fetchDockerConfig.nix
@@ -1,4 +1,4 @@
-pkgargs@{ stdenv, lib, haskellPackages, writeText, gawk }:
+pkgargs@{ lib, haskellPackages, writeText, gawk }:
 let
   generic-fetcher =
     import ./generic-fetcher.nix pkgargs;
diff --git a/pkgs/build-support/fetchdocker/fetchDockerLayer.nix b/pkgs/build-support/fetchdocker/fetchDockerLayer.nix
index 869ba637429c..0fbbc078efc3 100644
--- a/pkgs/build-support/fetchdocker/fetchDockerLayer.nix
+++ b/pkgs/build-support/fetchdocker/fetchDockerLayer.nix
@@ -1,4 +1,4 @@
-pkgargs@{ stdenv, lib, haskellPackages, writeText, gawk }:
+pkgargs@{ lib, haskellPackages, writeText, gawk }:
 let
   generic-fetcher =
     import ./generic-fetcher.nix pkgargs;
diff --git a/pkgs/build-support/plugins.nix b/pkgs/build-support/plugins.nix
index 1ed748515971..31b478c6c0de 100644
--- a/pkgs/build-support/plugins.nix
+++ b/pkgs/build-support/plugins.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv }:
+{ lib }:
 # helper functions for packaging programs with plugin systems
 {
 
diff --git a/pkgs/common-updater/unstable-updater.nix b/pkgs/common-updater/unstable-updater.nix
index 94cd33b9a26b..d315c1027ab4 100644
--- a/pkgs/common-updater/unstable-updater.nix
+++ b/pkgs/common-updater/unstable-updater.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, writeShellScript
+{ writeShellScript
 , coreutils
 , git
 , nix
diff --git a/pkgs/data/documentation/zeal/default.nix b/pkgs/data/documentation/zeal/default.nix
index a6c0b1f49185..8c806b87d4b2 100644
--- a/pkgs/data/documentation/zeal/default.nix
+++ b/pkgs/data/documentation/zeal/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, cmake, extra-cmake-modules, pkg-config
+{ lib, fetchFromGitHub, cmake, extra-cmake-modules, pkg-config
 , qtbase, qtimageformats, qtwebengine, qtx11extras, mkDerivation
 , libarchive, libXdmcp, libpthreadstubs, xcbutilkeysyms  }:
 
diff --git a/pkgs/data/fonts/et-book/default.nix b/pkgs/data/fonts/et-book/default.nix
index e7d97b777076..c410826b2fb5 100644
--- a/pkgs/data/fonts/et-book/default.nix
+++ b/pkgs/data/fonts/et-book/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub }:
+{ lib, fetchFromGitHub }:
 
 fetchFromGitHub rec {
   rev = "7e8f02dadcc23ba42b491b39e5bdf16e7b383031";
diff --git a/pkgs/data/fonts/fira-code/default.nix b/pkgs/data/fonts/fira-code/default.nix
index 546c7d905a7b..d5c5d0e000a5 100644
--- a/pkgs/data/fonts/fira-code/default.nix
+++ b/pkgs/data/fonts/fira-code/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchzip }:
+{ lib, fetchzip }:
 
 let
   version = "5.2";
diff --git a/pkgs/data/fonts/fira-code/symbols.nix b/pkgs/data/fonts/fira-code/symbols.nix
index 2e4cfc8f05b6..e226c351a333 100644
--- a/pkgs/data/fonts/fira-code/symbols.nix
+++ b/pkgs/data/fonts/fira-code/symbols.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchzip }:
+{ lib, fetchzip }:
 
 fetchzip {
   name = "fira-code-symbols-20160811";
diff --git a/pkgs/data/fonts/fira-mono/default.nix b/pkgs/data/fonts/fira-mono/default.nix
index 37f285b55527..2aef2fc4b05f 100644
--- a/pkgs/data/fonts/fira-mono/default.nix
+++ b/pkgs/data/fonts/fira-mono/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchzip }:
+{ lib, fetchzip }:
 
 fetchzip {
   name = "fira-mono-3.206";
diff --git a/pkgs/data/fonts/fixedsys-excelsior/default.nix b/pkgs/data/fonts/fixedsys-excelsior/default.nix
index e55ae0bcf11b..8bdbc2d4c4f0 100644
--- a/pkgs/data/fonts/fixedsys-excelsior/default.nix
+++ b/pkgs/data/fonts/fixedsys-excelsior/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl } :
+{ lib, fetchurl } :
 
 let
   major = "3";
diff --git a/pkgs/data/fonts/go-font/default.nix b/pkgs/data/fonts/go-font/default.nix
index 056cd621394f..ed17dfc9054c 100644
--- a/pkgs/data/fonts/go-font/default.nix
+++ b/pkgs/data/fonts/go-font/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit }:
+{ lib, fetchgit }:
 
 let
   version = "2017-03-30";
diff --git a/pkgs/data/fonts/jost/default.nix b/pkgs/data/fonts/jost/default.nix
index a8df441d9990..457cb0d03c99 100644
--- a/pkgs/data/fonts/jost/default.nix
+++ b/pkgs/data/fonts/jost/default.nix
@@ -1,4 +1,4 @@
-{lib, stdenv, fetchzip}:
+{lib, fetchzip}:
 
 let
   version = "3.5";
diff --git a/pkgs/data/fonts/paratype-pt/mono.nix b/pkgs/data/fonts/paratype-pt/mono.nix
index eecab47c0879..6b1cd370241b 100644
--- a/pkgs/data/fonts/paratype-pt/mono.nix
+++ b/pkgs/data/fonts/paratype-pt/mono.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchzip }:
+{ lib, fetchzip }:
 
 fetchzip {
   name = "paratype-pt-mono";
diff --git a/pkgs/data/fonts/paratype-pt/sans.nix b/pkgs/data/fonts/paratype-pt/sans.nix
index 826b8887365e..d6b783ebe4c7 100644
--- a/pkgs/data/fonts/paratype-pt/sans.nix
+++ b/pkgs/data/fonts/paratype-pt/sans.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchzip }:
+{ lib, fetchzip }:
 
 fetchzip {
   name = "paratype-pt-sans";
diff --git a/pkgs/data/fonts/paratype-pt/serif.nix b/pkgs/data/fonts/paratype-pt/serif.nix
index bbff974e1071..2b5eeafd09b9 100644
--- a/pkgs/data/fonts/paratype-pt/serif.nix
+++ b/pkgs/data/fonts/paratype-pt/serif.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchzip }:
+{ lib, fetchzip }:
 
 fetchzip {
   name = "paratype-pt-serif";
diff --git a/pkgs/data/fonts/ttf-bitstream-vera/default.nix b/pkgs/data/fonts/ttf-bitstream-vera/default.nix
index bcf6cefb8d67..95e4ce2a52ab 100644
--- a/pkgs/data/fonts/ttf-bitstream-vera/default.nix
+++ b/pkgs/data/fonts/ttf-bitstream-vera/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchzip }:
+{ lib, fetchzip }:
 let
   pname = "ttf-bitstream-vera";
   version = "1.10";
diff --git a/pkgs/data/fonts/ttf-tw-moe/default.nix b/pkgs/data/fonts/ttf-tw-moe/default.nix
index 695792894426..bf52d07c52e9 100644
--- a/pkgs/data/fonts/ttf-tw-moe/default.nix
+++ b/pkgs/data/fonts/ttf-tw-moe/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchzip }:
+{ lib, fetchzip }:
 let
   version = "2020-11-14";
 in
diff --git a/pkgs/data/fonts/vista-fonts/default.nix b/pkgs/data/fonts/vista-fonts/default.nix
index b71ef7c99ec8..20b5b673ccff 100644
--- a/pkgs/data/fonts/vista-fonts/default.nix
+++ b/pkgs/data/fonts/vista-fonts/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchzip, cabextract }:
+{ lib, fetchzip, cabextract }:
 
 fetchzip {
   name = "vista-fonts-1";
diff --git a/pkgs/data/misc/iana-etc/default.nix b/pkgs/data/misc/iana-etc/default.nix
index 1936bd6627a7..421054fa17f0 100644
--- a/pkgs/data/misc/iana-etc/default.nix
+++ b/pkgs/data/misc/iana-etc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchzip }:
+{ lib, fetchzip }:
 
 let
   version = "20200729";
diff --git a/pkgs/data/misc/mime-types/default.nix b/pkgs/data/misc/mime-types/default.nix
index dc942868250d..77b67e48f923 100644
--- a/pkgs/data/misc/mime-types/default.nix
+++ b/pkgs/data/misc/mime-types/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchzip }:
+{ lib, fetchzip }:
 
 let
   version = "9";
diff --git a/pkgs/data/misc/unicode-emoji/default.nix b/pkgs/data/misc/unicode-emoji/default.nix
index 60ff492330dc..b91afb08f60e 100644
--- a/pkgs/data/misc/unicode-emoji/default.nix
+++ b/pkgs/data/misc/unicode-emoji/default.nix
@@ -1,7 +1,6 @@
-{ stdenv
+{ lib
 , fetchurl
 , symlinkJoin
-, lib
 }:
 
 let
diff --git a/pkgs/desktops/cinnamon/cinnamon-gsettings-overrides/default.nix b/pkgs/desktops/cinnamon/cinnamon-gsettings-overrides/default.nix
index 26d9be6d904f..832a534e5daa 100644
--- a/pkgs/desktops/cinnamon/cinnamon-gsettings-overrides/default.nix
+++ b/pkgs/desktops/cinnamon/cinnamon-gsettings-overrides/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , runCommand
 , nixos-artwork
 , glib
diff --git a/pkgs/desktops/cinnamon/warpinator/default.nix b/pkgs/desktops/cinnamon/warpinator/default.nix
index 2338c834d1f8..efcd20457b32 100644
--- a/pkgs/desktops/cinnamon/warpinator/default.nix
+++ b/pkgs/desktops/cinnamon/warpinator/default.nix
@@ -1,5 +1,5 @@
 { fetchFromGitHub
-, lib, stdenv
+, lib
 , gobject-introspection
 , meson
 , ninja
diff --git a/pkgs/desktops/gnome-3/apps/accerciser/default.nix b/pkgs/desktops/gnome-3/apps/accerciser/default.nix
index 550f3f31d0bd..2f8163adc728 100644
--- a/pkgs/desktops/gnome-3/apps/accerciser/default.nix
+++ b/pkgs/desktops/gnome-3/apps/accerciser/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchurl
 , pkg-config
 , gnome3
diff --git a/pkgs/desktops/gnome-3/apps/gnome-music/default.nix b/pkgs/desktops/gnome-3/apps/gnome-music/default.nix
index fc0ee5d38ffa..be456071e41d 100644
--- a/pkgs/desktops/gnome-3/apps/gnome-music/default.nix
+++ b/pkgs/desktops/gnome-3/apps/gnome-music/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , meson
 , ninja
 , gettext
diff --git a/pkgs/desktops/gnome-3/core/gnome-tour/default.nix b/pkgs/desktops/gnome-3/core/gnome-tour/default.nix
index 26d7593038be..2b84442620db 100644
--- a/pkgs/desktops/gnome-3/core/gnome-tour/default.nix
+++ b/pkgs/desktops/gnome-3/core/gnome-tour/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , rustPlatform
 , gettext
 , meson
diff --git a/pkgs/desktops/lumina/lumina-calculator/default.nix b/pkgs/desktops/lumina/lumina-calculator/default.nix
index 05d80997b768..d0f09bbfae23 100644
--- a/pkgs/desktops/lumina/lumina-calculator/default.nix
+++ b/pkgs/desktops/lumina/lumina-calculator/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, qmake, qtbase, qttools }:
+{ lib, mkDerivation, fetchFromGitHub, qmake, qtbase, qttools }:
 
 mkDerivation rec {
   pname = "lumina-calculator";
diff --git a/pkgs/desktops/lumina/lumina-pdf/default.nix b/pkgs/desktops/lumina/lumina-pdf/default.nix
index 8d975c749d66..679dfa65b5a7 100644
--- a/pkgs/desktops/lumina/lumina-pdf/default.nix
+++ b/pkgs/desktops/lumina/lumina-pdf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, qmake, qtbase, qttools, poppler }:
+{ lib, mkDerivation, fetchFromGitHub, qmake, qtbase, qttools, poppler }:
 
 mkDerivation rec {
   pname = "lumina-pdf";
diff --git a/pkgs/desktops/lumina/lumina/default.nix b/pkgs/desktops/lumina/lumina/default.nix
index 4daaf15534c1..d31f16e235ad 100644
--- a/pkgs/desktops/lumina/lumina/default.nix
+++ b/pkgs/desktops/lumina/lumina/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , mkDerivation
 , fetchFromGitHub
 , fluxbox
diff --git a/pkgs/desktops/mate/mate-tweak/default.nix b/pkgs/desktops/mate/mate-tweak/default.nix
index 316a72a09c7f..ce97bc416e69 100644
--- a/pkgs/desktops/mate/mate-tweak/default.nix
+++ b/pkgs/desktops/mate/mate-tweak/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , python3Packages
 , intltool
diff --git a/pkgs/desktops/mate/mozo/default.nix b/pkgs/desktops/mate/mozo/default.nix
index cee4261a77dc..4d893cd2e741 100644
--- a/pkgs/desktops/mate/mozo/default.nix
+++ b/pkgs/desktops/mate/mozo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3, fetchurl, pkg-config, gettext, mate, gtk3, glib, wrapGAppsHook, gobject-introspection }:
+{ lib, python3, fetchurl, pkg-config, gettext, mate, gtk3, glib, wrapGAppsHook, gobject-introspection }:
 
 python3.pkgs.buildPythonApplication rec {
   pname = "mozo";
diff --git a/pkgs/desktops/pantheon/desktop/elementary-gsettings-schemas/default.nix b/pkgs/desktops/pantheon/desktop/elementary-gsettings-schemas/default.nix
index 40ac23ca7f1f..bfe95e0be46d 100644
--- a/pkgs/desktops/pantheon/desktop/elementary-gsettings-schemas/default.nix
+++ b/pkgs/desktops/pantheon/desktop/elementary-gsettings-schemas/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , runCommand
 , mutter
 , elementary-default-settings
diff --git a/pkgs/desktops/xfce/applications/catfish/default.nix b/pkgs/desktops/xfce/applications/catfish/default.nix
index 85f823221b74..e47f1dea3f63 100644
--- a/pkgs/desktops/xfce/applications/catfish/default.nix
+++ b/pkgs/desktops/xfce/applications/catfish/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, file, which, intltool, gobject-introspection,
+{ lib, fetchurl, file, which, intltool, gobject-introspection,
   findutils, xdg_utils, dconf, gtk3, python3Packages,
   wrapGAppsHook
 }:
diff --git a/pkgs/desktops/xfce/panel-plugins/xfce4-datetime-plugin/default.nix b/pkgs/desktops/xfce/panel-plugins/xfce4-datetime-plugin/default.nix
index aa14c878b12a..304b9d9076db 100644
--- a/pkgs/desktops/xfce/panel-plugins/xfce4-datetime-plugin/default.nix
+++ b/pkgs/desktops/xfce/panel-plugins/xfce4-datetime-plugin/default.nix
@@ -1,5 +1,5 @@
 { mkXfceDerivation
-, lib, stdenv
+, lib
 , intltool
 , libxfce4ui
 , xfce4-panel
diff --git a/pkgs/desktops/xfce/thunar-plugins/archive/default.nix b/pkgs/desktops/xfce/thunar-plugins/archive/default.nix
index 985b067a02fb..c46b5a0fd1b7 100644
--- a/pkgs/desktops/xfce/thunar-plugins/archive/default.nix
+++ b/pkgs/desktops/xfce/thunar-plugins/archive/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , mkXfceDerivation
 , gtk3
 , thunar
diff --git a/pkgs/development/arduino/ino/default.nix b/pkgs/development/arduino/ino/default.nix
index c536ed8c2c02..822cfb0e361a 100644
--- a/pkgs/development/arduino/ino/default.nix
+++ b/pkgs/development/arduino/ino/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchurl, python2Packages, picocom
+{ lib, fetchurl, python2Packages, picocom
 , avrdude, arduino-core }:
 
 python2Packages.buildPythonApplication rec {
diff --git a/pkgs/development/beam-modules/build-hex.nix b/pkgs/development/beam-modules/build-hex.nix
index e0d9dfc42889..1ebe3760ec8d 100644
--- a/pkgs/development/beam-modules/build-hex.nix
+++ b/pkgs/development/beam-modules/build-hex.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildRebar3, fetchHex }:
+{ lib, buildRebar3, fetchHex }:
 
 { name, version, sha256
 , builder ? buildRebar3
diff --git a/pkgs/development/beam-modules/default.nix b/pkgs/development/beam-modules/default.nix
index 4f312129b387..570155e4d1a8 100644
--- a/pkgs/development/beam-modules/default.nix
+++ b/pkgs/development/beam-modules/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, pkgs, erlang }:
+{ lib, pkgs, erlang }:
 
 let
   inherit (lib) makeExtensible;
diff --git a/pkgs/development/beam-modules/lib.nix b/pkgs/development/beam-modules/lib.nix
index 7ae2e0e26066..1b021cf93472 100644
--- a/pkgs/development/beam-modules/lib.nix
+++ b/pkgs/development/beam-modules/lib.nix
@@ -1,4 +1,4 @@
-{ pkgs, lib, stdenv }:
+{ pkgs, lib }:
 
 rec {
 
diff --git a/pkgs/development/compilers/carp/default.nix b/pkgs/development/compilers/carp/default.nix
index 0299c1797755..b0a14534b082 100644
--- a/pkgs/development/compilers/carp/default.nix
+++ b/pkgs/development/compilers/carp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, makeWrapper, clang, haskellPackages }:
+{ lib, fetchFromGitHub, makeWrapper, clang, haskellPackages }:
 
 haskellPackages.mkDerivation rec {
 
diff --git a/pkgs/development/compilers/chicken/4/egg2nix.nix b/pkgs/development/compilers/chicken/4/egg2nix.nix
index 2775666f14c3..d2f2805ed7ff 100644
--- a/pkgs/development/compilers/chicken/4/egg2nix.nix
+++ b/pkgs/development/compilers/chicken/4/egg2nix.nix
@@ -1,4 +1,4 @@
-{ stdenv, eggDerivation, fetchurl, chickenEggs }:
+{ eggDerivation, fetchurl, chickenEggs }:
 
 # Note: This mostly reimplements the default.nix already contained in
 # the tarball. Is there a nicer way than duplicating code?
diff --git a/pkgs/development/compilers/chicken/4/eggs.nix b/pkgs/development/compilers/chicken/4/eggs.nix
index 6e6f104f8a0c..8c96caca2623 100644
--- a/pkgs/development/compilers/chicken/4/eggs.nix
+++ b/pkgs/development/compilers/chicken/4/eggs.nix
@@ -1,4 +1,4 @@
-{ pkgs, stdenv }:
+{ pkgs }:
 rec {
   inherit (pkgs) eggDerivation fetchegg;
 
diff --git a/pkgs/development/compilers/chicken/5/egg2nix.nix b/pkgs/development/compilers/chicken/5/egg2nix.nix
index 69e8d9e62c35..62b634eb6370 100644
--- a/pkgs/development/compilers/chicken/5/egg2nix.nix
+++ b/pkgs/development/compilers/chicken/5/egg2nix.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, eggDerivation, fetchFromGitHub, chickenEggs }:
+{ lib, eggDerivation, fetchFromGitHub, chickenEggs }:
 
 # Note: This mostly reimplements the default.nix already contained in
 # the tarball. Is there a nicer way than duplicating code?
diff --git a/pkgs/development/compilers/chicken/5/eggs.nix b/pkgs/development/compilers/chicken/5/eggs.nix
index 3c4ae74c1e66..1c1377350d21 100644
--- a/pkgs/development/compilers/chicken/5/eggs.nix
+++ b/pkgs/development/compilers/chicken/5/eggs.nix
@@ -1,4 +1,4 @@
-{ pkgs, stdenv }:
+{ pkgs }:
 rec {
   inherit (pkgs) eggDerivation fetchegg;
 
diff --git a/pkgs/development/compilers/elm/packages/elm-format.nix b/pkgs/development/compilers/elm/packages/elm-format.nix
index 71386e00ef11..b2f655d4f1c5 100644
--- a/pkgs/development/compilers/elm/packages/elm-format.nix
+++ b/pkgs/development/compilers/elm/packages/elm-format.nix
@@ -1,7 +1,7 @@
 { mkDerivation, fetchgit, ansi-terminal, ansi-wl-pprint, array, base, binary
 , bytestring, cmark, containers, directory, filepath, free, HUnit
 , indents, json, mtl, optparse-applicative, parsec, process
-, QuickCheck, quickcheck-io, split, lib, stdenv, tasty, tasty-golden
+, QuickCheck, quickcheck-io, split, lib, tasty, tasty-golden
 , tasty-hunit, tasty-quickcheck, text
 }:
 mkDerivation {
diff --git a/pkgs/development/compilers/elm/packages/elm-instrument.nix b/pkgs/development/compilers/elm/packages/elm-instrument.nix
index cd13eb4de4f1..cf0ba2303e10 100644
--- a/pkgs/development/compilers/elm/packages/elm-instrument.nix
+++ b/pkgs/development/compilers/elm/packages/elm-instrument.nix
@@ -2,7 +2,7 @@
 , bytestring, Cabal, cmark, containers, directory, elm-format
 , fetchgit, filepath, free, HUnit, indents, json, mtl
 , optparse-applicative, parsec, process, QuickCheck, quickcheck-io
-, split, lib, stdenv, tasty, tasty-golden, tasty-hunit, tasty-quickcheck
+, split, lib, tasty, tasty-golden, tasty-hunit, tasty-quickcheck
 , text
 }:
 mkDerivation {
diff --git a/pkgs/development/compilers/elm/packages/elm.nix b/pkgs/development/compilers/elm/packages/elm.nix
index edb2ed6ed7a2..c012d59d8ae3 100644
--- a/pkgs/development/compilers/elm/packages/elm.nix
+++ b/pkgs/development/compilers/elm/packages/elm.nix
@@ -3,7 +3,7 @@
 , file-embed, filelock, filepath, ghc-prim, haskeline, HTTP
 , http-client, http-client-tls, http-types, language-glsl, mtl
 , network, parsec, process, raw-strings-qq, scientific, SHA
-, snap-core, snap-server, lib, stdenv, template-haskell, time
+, snap-core, snap-server, lib, template-haskell, time
 , unordered-containers, utf8-string, vector, zip-archive
 }:
 mkDerivation {
diff --git a/pkgs/development/compilers/elm/packages/elmi-to-json.nix b/pkgs/development/compilers/elm/packages/elmi-to-json.nix
index 6788fce6a990..3362ce5cc7a7 100644
--- a/pkgs/development/compilers/elm/packages/elmi-to-json.nix
+++ b/pkgs/development/compilers/elm/packages/elmi-to-json.nix
@@ -1,6 +1,6 @@
 { mkDerivation, aeson, base, binary, bytestring, containers
 , directory, fetchgit, filepath, ghc-prim, hpack
-, optparse-applicative, lib, stdenv, text, unliftio
+, optparse-applicative, lib, text, unliftio
 , unordered-containers
 }:
 mkDerivation {
diff --git a/pkgs/development/compilers/elm/packages/indents.nix b/pkgs/development/compilers/elm/packages/indents.nix
index 80f3c08d9e33..d196e8d0fbf6 100644
--- a/pkgs/development/compilers/elm/packages/indents.nix
+++ b/pkgs/development/compilers/elm/packages/indents.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, base, concatenative, mtl, parsec, lib, stdenv }:
+{ mkDerivation, base, concatenative, mtl, parsec, lib }:
 mkDerivation {
   pname = "indents";
   version = "0.3.3";
diff --git a/pkgs/development/compilers/ghcjs-ng/ghcjs-base.nix b/pkgs/development/compilers/ghcjs-ng/ghcjs-base.nix
index 82c37bd86177..54a60b50372e 100644
--- a/pkgs/development/compilers/ghcjs-ng/ghcjs-base.nix
+++ b/pkgs/development/compilers/ghcjs-ng/ghcjs-base.nix
@@ -1,7 +1,7 @@
 { mkDerivation, aeson, array, attoparsec, base, binary, bytestring
 , containers, deepseq, directory, dlist, fetchgit, ghc-prim
 , ghcjs-prim, hashable, HUnit, integer-gmp, primitive, QuickCheck
-, quickcheck-unicode, random, scientific, stdenv, test-framework
+, quickcheck-unicode, random, scientific, test-framework
 , test-framework-hunit, test-framework-quickcheck2, text, time
 , transformers, unordered-containers, vector
 }:
diff --git a/pkgs/development/compilers/ios-cross-compile/9.2.nix b/pkgs/development/compilers/ios-cross-compile/9.2.nix
index cabdbd9dcc01..688ca15177a8 100644
--- a/pkgs/development/compilers/ios-cross-compile/9.2.nix
+++ b/pkgs/development/compilers/ios-cross-compile/9.2.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, git, clang,
+{ lib, git, clang,
   fetchFromGitHub, requireFile,
   openssl, xz, gnutar,
   automake, autoconf, libtool, clangStdenv } :
diff --git a/pkgs/development/compilers/jetbrains-jdk/default.nix b/pkgs/development/compilers/jetbrains-jdk/default.nix
index 2edf93b7fc02..3b5465ac9c3e 100644
--- a/pkgs/development/compilers/jetbrains-jdk/default.nix
+++ b/pkgs/development/compilers/jetbrains-jdk/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, openjdk11, fetchFromGitHub, jetbrains }:
+{ lib, openjdk11, fetchFromGitHub, jetbrains }:
 
 openjdk11.overrideAttrs (oldAttrs: rec {
   pname = "jetbrains-jdk";
diff --git a/pkgs/development/compilers/meta-environment/meta-build-env/default.nix b/pkgs/development/compilers/meta-environment/meta-build-env/default.nix
index 34d8f98970e0..454156c2d280 100644
--- a/pkgs/development/compilers/meta-environment/meta-build-env/default.nix
+++ b/pkgs/development/compilers/meta-environment/meta-build-env/default.nix
@@ -1,4 +1,6 @@
-{lib, stdenv, fetchurl}: stdenv.mkDerivation {
+{ lib, stdenv, fetchurl }:
+
+stdenv.mkDerivation {
   name = "meta-build-env-0.1";
   src = fetchurl {
     url = "http://www.meta-environment.org/releases/meta-build-env-0.1.tar.gz";
diff --git a/pkgs/development/compilers/osl/default.nix b/pkgs/development/compilers/osl/default.nix
index d3de5cad2f69..100676448131 100644
--- a/pkgs/development/compilers/osl/default.nix
+++ b/pkgs/development/compilers/osl/default.nix
@@ -1,4 +1,4 @@
-{ clangStdenv, lib, stdenv, fetchFromGitHub, cmake, zlib, openexr,
+{ clangStdenv, lib, fetchFromGitHub, cmake, zlib, openexr,
 openimageio, llvm, boost165, flex, bison, partio, pugixml,
 util-linux, python
 }:
diff --git a/pkgs/development/compilers/pakcs/curry-base.nix b/pkgs/development/compilers/pakcs/curry-base.nix
index 660a4f2de40b..c461d2caa93c 100644
--- a/pkgs/development/compilers/pakcs/curry-base.nix
+++ b/pkgs/development/compilers/pakcs/curry-base.nix
@@ -1,5 +1,5 @@
 { mkDerivation, base, Cabal, containers, directory, extra, filepath
-, mtl, parsec, pretty, lib, stdenv, time, transformers
+, mtl, parsec, pretty, lib, time, transformers
 }:
 mkDerivation {
   pname = "curry-base";
diff --git a/pkgs/development/compilers/pakcs/curry-frontend.nix b/pkgs/development/compilers/pakcs/curry-frontend.nix
index 8fd1645ee704..88e88487594b 100644
--- a/pkgs/development/compilers/pakcs/curry-frontend.nix
+++ b/pkgs/development/compilers/pakcs/curry-frontend.nix
@@ -1,6 +1,6 @@
 { mkDerivation, base, bytestring, Cabal, containers, curry-base
 , directory, extra, file-embed, filepath, mtl, network-uri, pretty
-, process, set-extra, lib, stdenv, template-haskell, transformers
+, process, set-extra, lib, template-haskell, transformers
 }:
 mkDerivation {
   pname = "curry-frontend";
diff --git a/pkgs/development/compilers/vyper/default.nix b/pkgs/development/compilers/vyper/default.nix
index 79702c01bee3..81ee04edf088 100644
--- a/pkgs/development/compilers/vyper/default.nix
+++ b/pkgs/development/compilers/vyper/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonPackage, fetchPypi, writeText, asttokens
+{ lib, buildPythonPackage, fetchPypi, writeText, asttokens
 , pycryptodome, pytest_xdist, pytestcov, recommonmark, semantic-version, sphinx
 , sphinx_rtd_theme, pytestrunner }:
 
diff --git a/pkgs/development/idris-modules/tfrandom.nix b/pkgs/development/idris-modules/tfrandom.nix
index 5c6319503123..8249259075c0 100644
--- a/pkgs/development/idris-modules/tfrandom.nix
+++ b/pkgs/development/idris-modules/tfrandom.nix
@@ -1,8 +1,8 @@
-{ stdenv
+{ lib
 , build-idris-package
 , fetchFromGitHub
-, lib
 }:
+
 build-idris-package  {
   name = "tf-random";
   version = "2020-01-15";
diff --git a/pkgs/development/idris-modules/with-packages.nix b/pkgs/development/idris-modules/with-packages.nix
index 72b9067b6915..080cbe2778a6 100644
--- a/pkgs/development/idris-modules/with-packages.nix
+++ b/pkgs/development/idris-modules/with-packages.nix
@@ -1,6 +1,6 @@
 # Build a version of idris with a set of packages visible
 # packages: The packages visible to idris
-{ stdenv, lib, idris, symlinkJoin, makeWrapper }: packages:
+{ lib, idris, symlinkJoin, makeWrapper }: packages:
 
 let paths = lib.closePropagation packages;
 in
diff --git a/pkgs/development/interpreters/hy/default.nix b/pkgs/development/interpreters/hy/default.nix
index 6bfef26b4ddc..e39bf915cfcf 100644
--- a/pkgs/development/interpreters/hy/default.nix
+++ b/pkgs/development/interpreters/hy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages }:
+{ lib, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   pname = "hy";
diff --git a/pkgs/development/interpreters/joker/default.nix b/pkgs/development/interpreters/joker/default.nix
index 3d36dde8e0f9..004d2732f3a6 100644
--- a/pkgs/development/interpreters/joker/default.nix
+++ b/pkgs/development/interpreters/joker/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "joker";
diff --git a/pkgs/development/interpreters/lfe/generic-builder.nix b/pkgs/development/interpreters/lfe/generic-builder.nix
index d6090152d158..895054fac467 100644
--- a/pkgs/development/interpreters/lfe/generic-builder.nix
+++ b/pkgs/development/interpreters/lfe/generic-builder.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, erlang, makeWrapper, coreutils, bash, buildRebar3, buildHex }:
+{ lib, fetchFromGitHub, erlang, makeWrapper, coreutils, bash, buildRebar3, buildHex }:
 
 { baseName ? "lfe"
 , version
diff --git a/pkgs/development/interpreters/perl/wrapper.nix b/pkgs/development/interpreters/perl/wrapper.nix
index 865d8fde9eac..da95b5a89647 100644
--- a/pkgs/development/interpreters/perl/wrapper.nix
+++ b/pkgs/development/interpreters/perl/wrapper.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, perl, buildEnv, makeWrapper
+{ lib, perl, buildEnv, makeWrapper
 , extraLibs ? []
 , extraOutputsToInstall ? []
 , postBuild ? ""
diff --git a/pkgs/development/interpreters/pyrex/0.9.5.nix b/pkgs/development/interpreters/pyrex/0.9.5.nix
index 668adf2c44a2..a9c71c6fcf70 100644
--- a/pkgs/development/interpreters/pyrex/0.9.5.nix
+++ b/pkgs/development/interpreters/pyrex/0.9.5.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, python2Packages }:
+{ lib, fetchurl, python2Packages }:
 
 let version = "0.9.5.1.1"; in
 
diff --git a/pkgs/development/interpreters/pyrex/0.9.6.nix b/pkgs/development/interpreters/pyrex/0.9.6.nix
index 2c4c74baecf1..12429c05fe63 100644
--- a/pkgs/development/interpreters/pyrex/0.9.6.nix
+++ b/pkgs/development/interpreters/pyrex/0.9.6.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, python2Packages }:
+{ lib, fetchurl, python2Packages }:
 
 let version = "0.9.6.4"; in
 
diff --git a/pkgs/development/java-modules/build-maven-package.nix b/pkgs/development/java-modules/build-maven-package.nix
index cb895d9c6720..432f972b0ff6 100644
--- a/pkgs/development/java-modules/build-maven-package.nix
+++ b/pkgs/development/java-modules/build-maven-package.nix
@@ -5,7 +5,7 @@ with builtins;
 with lib;
 
 let
-  mavenMinimal = import ./maven-minimal.nix { inherit lib pkgs stdenv; };
+  mavenMinimal = import ./maven-minimal.nix { inherit lib pkgs ; };
 in stdenv.mkDerivation rec {
   inherit mavenDeps src name meta m2Path;
 
diff --git a/pkgs/development/java-modules/junit/default.nix b/pkgs/development/java-modules/junit/default.nix
index c4b02071ec04..2cb9ab001c29 100644
--- a/pkgs/development/java-modules/junit/default.nix
+++ b/pkgs/development/java-modules/junit/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, pkgs, mavenbuild, fetchMaven }:
+{ lib, pkgs, mavenbuild, fetchMaven }:
 
 with pkgs.javaPackages;
 
diff --git a/pkgs/development/java-modules/maven-hello/default.nix b/pkgs/development/java-modules/maven-hello/default.nix
index e0087e857a47..eac127b6dccc 100644
--- a/pkgs/development/java-modules/maven-hello/default.nix
+++ b/pkgs/development/java-modules/maven-hello/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, pkgs, mavenbuild }:
+{ lib, pkgs, mavenbuild }:
 
 with pkgs.javaPackages;
 
diff --git a/pkgs/development/java-modules/maven-minimal.nix b/pkgs/development/java-modules/maven-minimal.nix
index 9019e3ba28e9..d966a75bb9d0 100644
--- a/pkgs/development/java-modules/maven-minimal.nix
+++ b/pkgs/development/java-modules/maven-minimal.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, pkgs }:
+{ lib, pkgs }:
 
 with lib;
 with pkgs.javaPackages;
diff --git a/pkgs/development/libraries/agda/agda-prelude/default.nix b/pkgs/development/libraries/agda/agda-prelude/default.nix
index 79bb783cc9ff..21883acd1958 100644
--- a/pkgs/development/libraries/agda/agda-prelude/default.nix
+++ b/pkgs/development/libraries/agda/agda-prelude/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub }:
+{ lib, mkDerivation, fetchFromGitHub }:
 
 mkDerivation rec {
   version = "compat-2.6.1";
diff --git a/pkgs/development/libraries/agda/functional-linear-algebra/default.nix b/pkgs/development/libraries/agda/functional-linear-algebra/default.nix
index 7ec892bfe023..ce4deb5b5190 100644
--- a/pkgs/development/libraries/agda/functional-linear-algebra/default.nix
+++ b/pkgs/development/libraries/agda/functional-linear-algebra/default.nix
@@ -1,4 +1,4 @@
-{ fetchFromGitHub, lib, stdenv, mkDerivation, standard-library }:
+{ fetchFromGitHub, lib, mkDerivation, standard-library }:
 
 mkDerivation rec {
   version = "0.1";
diff --git a/pkgs/development/libraries/agda/iowa-stdlib/default.nix b/pkgs/development/libraries/agda/iowa-stdlib/default.nix
index 2ebb3f66ed08..1383cff9e55a 100644
--- a/pkgs/development/libraries/agda/iowa-stdlib/default.nix
+++ b/pkgs/development/libraries/agda/iowa-stdlib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub }:
+{ lib, mkDerivation, fetchFromGitHub }:
 
 mkDerivation (rec {
   version = "1.5.0";
diff --git a/pkgs/development/libraries/agda/standard-library/default.nix b/pkgs/development/libraries/agda/standard-library/default.nix
index 1d8dc03bbde9..c0b0287d8972 100644
--- a/pkgs/development/libraries/agda/standard-library/default.nix
+++ b/pkgs/development/libraries/agda/standard-library/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, ghcWithPackages }:
+{ lib, mkDerivation, fetchFromGitHub, ghcWithPackages }:
 
 mkDerivation rec {
   pname = "standard-library";
diff --git a/pkgs/development/libraries/appstream/qt.nix b/pkgs/development/libraries/appstream/qt.nix
index c9fc96b32512..9ae1cce684ab 100644
--- a/pkgs/development/libraries/appstream/qt.nix
+++ b/pkgs/development/libraries/appstream/qt.nix
@@ -1,4 +1,4 @@
-{ stdenv, mkDerivation, appstream, qtbase, qttools }:
+{ mkDerivation, appstream, qtbase, qttools }:
 
 # TODO: look into using the libraries from the regular appstream derivation as we keep duplicates here
 
diff --git a/pkgs/development/libraries/boost/1.59.nix b/pkgs/development/libraries/boost/1.59.nix
index fb65e49c500c..0f6e9a35b6e0 100644
--- a/pkgs/development/libraries/boost/1.59.nix
+++ b/pkgs/development/libraries/boost/1.59.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, fetchurl, ... } @ args:
+{ callPackage, fetchurl, ... } @ args:
 
 callPackage ./generic.nix (args // {
   version = "1.59.0";
diff --git a/pkgs/development/libraries/boost/1.60.nix b/pkgs/development/libraries/boost/1.60.nix
index 646f4652f77d..4bc7a1cc7327 100644
--- a/pkgs/development/libraries/boost/1.60.nix
+++ b/pkgs/development/libraries/boost/1.60.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, fetchurl, ... } @ args:
+{ callPackage, fetchurl, ... } @ args:
 
 callPackage ./generic.nix (args // {
   version = "1.60.0";
diff --git a/pkgs/development/libraries/boost/1.65.nix b/pkgs/development/libraries/boost/1.65.nix
index 922c09ba7fe9..764f38d5b747 100644
--- a/pkgs/development/libraries/boost/1.65.nix
+++ b/pkgs/development/libraries/boost/1.65.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, fetchurl, ... } @ args:
+{ callPackage, fetchurl, ... } @ args:
 
 callPackage ./generic.nix (args // {
   version = "1.65.1";
diff --git a/pkgs/development/libraries/boost/1.66.nix b/pkgs/development/libraries/boost/1.66.nix
index 0a99717a7997..af61aa51944c 100644
--- a/pkgs/development/libraries/boost/1.66.nix
+++ b/pkgs/development/libraries/boost/1.66.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, fetchurl, ... } @ args:
+{ callPackage, fetchurl, ... } @ args:
 
 callPackage ./generic.nix (args // {
   version = "1.66.0";
diff --git a/pkgs/development/libraries/boost/1.68.nix b/pkgs/development/libraries/boost/1.68.nix
index 4d98172c6d05..920dd9a300b1 100644
--- a/pkgs/development/libraries/boost/1.68.nix
+++ b/pkgs/development/libraries/boost/1.68.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, fetchurl, fetchpatch, ... } @ args:
+{ callPackage, fetchurl, fetchpatch, ... } @ args:
 
 callPackage ./generic.nix (args // {
   version = "1.68.0";
diff --git a/pkgs/development/libraries/boost/1.69.nix b/pkgs/development/libraries/boost/1.69.nix
index 95c4aa854a46..7292356ecd1c 100644
--- a/pkgs/development/libraries/boost/1.69.nix
+++ b/pkgs/development/libraries/boost/1.69.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, fetchurl, fetchpatch, ... } @ args:
+{ callPackage, fetchurl, fetchpatch, ... } @ args:
 
 callPackage ./generic.nix (args // {
   version = "1.69.0";
diff --git a/pkgs/development/libraries/boost/1.70.nix b/pkgs/development/libraries/boost/1.70.nix
index 45a8bdb93185..3b898cfc0ae5 100644
--- a/pkgs/development/libraries/boost/1.70.nix
+++ b/pkgs/development/libraries/boost/1.70.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, fetchurl, fetchpatch, ... } @ args:
+{ callPackage, fetchurl, fetchpatch, ... } @ args:
 
 callPackage ./generic.nix (args // {
   version = "1.70.0";
diff --git a/pkgs/development/libraries/boost/1.71.nix b/pkgs/development/libraries/boost/1.71.nix
index 7b128e25bb60..bec741dd88a2 100644
--- a/pkgs/development/libraries/boost/1.71.nix
+++ b/pkgs/development/libraries/boost/1.71.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, fetchurl, fetchpatch, ... } @ args:
+{ callPackage, fetchurl, fetchpatch, ... } @ args:
 
 callPackage ./generic.nix (args // rec {
   version = "1.71.0";
diff --git a/pkgs/development/libraries/boost/1.72.nix b/pkgs/development/libraries/boost/1.72.nix
index 680afe8bcb87..97dad9b6c8a8 100644
--- a/pkgs/development/libraries/boost/1.72.nix
+++ b/pkgs/development/libraries/boost/1.72.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, fetchurl, fetchpatch, ... } @ args:
+{ callPackage, fetchurl, fetchpatch, ... } @ args:
 
 callPackage ./generic.nix (args // rec {
   version = "1.72.0";
diff --git a/pkgs/development/libraries/boost/1.73.nix b/pkgs/development/libraries/boost/1.73.nix
index 99a5486f197e..289bea197c35 100644
--- a/pkgs/development/libraries/boost/1.73.nix
+++ b/pkgs/development/libraries/boost/1.73.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, fetchurl, fetchpatch, ... } @ args:
+{ callPackage, fetchurl, fetchpatch, ... } @ args:
 
 callPackage ./generic.nix (args // rec {
   version = "1.73.0";
diff --git a/pkgs/development/libraries/boost/1.74.nix b/pkgs/development/libraries/boost/1.74.nix
index 35b4013dcb36..a181ed94c266 100644
--- a/pkgs/development/libraries/boost/1.74.nix
+++ b/pkgs/development/libraries/boost/1.74.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, fetchurl, fetchpatch, ... } @ args:
+{ callPackage, fetchurl, fetchpatch, ... } @ args:
 
 callPackage ./generic.nix (args // rec {
   version = "1.74.0";
diff --git a/pkgs/development/libraries/boost/1.75.nix b/pkgs/development/libraries/boost/1.75.nix
index 9912032c7774..ff1073bd0268 100644
--- a/pkgs/development/libraries/boost/1.75.nix
+++ b/pkgs/development/libraries/boost/1.75.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, fetchurl, fetchpatch, ... } @ args:
+{ callPackage, fetchurl, fetchpatch, ... } @ args:
 
 callPackage ./generic.nix (args // rec {
   version = "1.75.0";
diff --git a/pkgs/development/libraries/cxxtest/default.nix b/pkgs/development/libraries/cxxtest/default.nix
index 1a828cc451dc..3469cda3fc70 100644
--- a/pkgs/development/libraries/cxxtest/default.nix
+++ b/pkgs/development/libraries/cxxtest/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonApplication, fetchFromGitHub }:
+{ lib, buildPythonApplication, fetchFromGitHub }:
 
 buildPythonApplication rec {
   pname = "cxxtest";
diff --git a/pkgs/development/libraries/ffmpeg/3.4.nix b/pkgs/development/libraries/ffmpeg/3.4.nix
index 629fdba5673a..be341d588c1d 100644
--- a/pkgs/development/libraries/ffmpeg/3.4.nix
+++ b/pkgs/development/libraries/ffmpeg/3.4.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, fetchpatch
+{ callPackage, fetchpatch
 # Darwin frameworks
 , Cocoa, CoreMedia
 , ...
diff --git a/pkgs/development/libraries/ffmpeg/4.nix b/pkgs/development/libraries/ffmpeg/4.nix
index 7e3941d3f378..2cc409fc0370 100644
--- a/pkgs/development/libraries/ffmpeg/4.nix
+++ b/pkgs/development/libraries/ffmpeg/4.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, fetchpatch
+{ callPackage, fetchpatch
 # Darwin frameworks
 , Cocoa, CoreMedia, VideoToolbox
 , ...
diff --git a/pkgs/development/libraries/java/junit/default.nix b/pkgs/development/libraries/java/junit/default.nix
index 1695d11cb25f..5a1079851772 100644
--- a/pkgs/development/libraries/java/junit/default.nix
+++ b/pkgs/development/libraries/java/junit/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, antBuild, fetchgit, perl }:
+{ lib, antBuild, fetchgit, perl }:
 
 let
   version = "4.11";
diff --git a/pkgs/development/libraries/libcollectdclient/default.nix b/pkgs/development/libraries/libcollectdclient/default.nix
index df8db3ac9f89..0bf654ee963c 100644
--- a/pkgs/development/libraries/libcollectdclient/default.nix
+++ b/pkgs/development/libraries/libcollectdclient/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, collectd }:
+{ lib, collectd }:
 with lib;
 
 collectd.overrideAttrs (oldAttrs: {
diff --git a/pkgs/development/libraries/libmicrohttpd/0.9.70.nix b/pkgs/development/libraries/libmicrohttpd/0.9.70.nix
index 1cd04b0b2777..c0321e327c52 100644
--- a/pkgs/development/libraries/libmicrohttpd/0.9.70.nix
+++ b/pkgs/development/libraries/libmicrohttpd/0.9.70.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, fetchurl }:
+{ callPackage, fetchurl }:
 
 callPackage ./generic.nix ( rec {
   version = "0.9.70";
diff --git a/pkgs/development/libraries/libmicrohttpd/0.9.71.nix b/pkgs/development/libraries/libmicrohttpd/0.9.71.nix
index 74bd6cce42c4..7e60f8c72726 100644
--- a/pkgs/development/libraries/libmicrohttpd/0.9.71.nix
+++ b/pkgs/development/libraries/libmicrohttpd/0.9.71.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, fetchurl }:
+{ callPackage, fetchurl }:
 
 callPackage ./generic.nix ( rec {
   version = "0.9.71";
diff --git a/pkgs/development/libraries/libmicrohttpd/0.9.72.nix b/pkgs/development/libraries/libmicrohttpd/0.9.72.nix
index 8eeb94cdc295..4c695218184c 100644
--- a/pkgs/development/libraries/libmicrohttpd/0.9.72.nix
+++ b/pkgs/development/libraries/libmicrohttpd/0.9.72.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, fetchurl }:
+{ callPackage, fetchurl }:
 
 callPackage ./generic.nix ( rec {
   version = "0.9.72";
diff --git a/pkgs/development/libraries/lief/default.nix b/pkgs/development/libraries/lief/default.nix
index 3b57d0c2f7ae..953eee3b8bdb 100644
--- a/pkgs/development/libraries/lief/default.nix
+++ b/pkgs/development/libraries/lief/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchzip }:
+{ lib, fetchzip }:
 
 fetchzip {
   url = "https://github.com/lief-project/LIEF/releases/download/0.9.0/LIEF-0.9.0-Linux.tar.gz";
diff --git a/pkgs/development/libraries/mlt/qt-5.nix b/pkgs/development/libraries/mlt/qt-5.nix
index 7004a5e11c04..7434383e1650 100644
--- a/pkgs/development/libraries/mlt/qt-5.nix
+++ b/pkgs/development/libraries/mlt/qt-5.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , SDL
 , ffmpeg
diff --git a/pkgs/development/libraries/packr/default.nix b/pkgs/development/libraries/packr/default.nix
index 7bf0cb2c5fbc..e3abc6e5d62e 100644
--- a/pkgs/development/libraries/packr/default.nix
+++ b/pkgs/development/libraries/packr/default.nix
@@ -1,7 +1,7 @@
 { buildGoModule
 , fetchFromGitHub
 , lib
-, stdenv
+
 , symlinkJoin
 }:
 
diff --git a/pkgs/development/libraries/pkger/default.nix b/pkgs/development/libraries/pkger/default.nix
index 4d7c682f0229..f2e984c8c816 100644
--- a/pkgs/development/libraries/pkger/default.nix
+++ b/pkgs/development/libraries/pkger/default.nix
@@ -1,7 +1,7 @@
 { buildGoModule
 , fetchFromGitHub
 , lib
-, stdenv
+
 }:
 
 buildGoModule rec {
diff --git a/pkgs/development/libraries/prototypejs/default.nix b/pkgs/development/libraries/prototypejs/default.nix
index 81e72036694b..fd06b49604ad 100644
--- a/pkgs/development/libraries/prototypejs/default.nix
+++ b/pkgs/development/libraries/prototypejs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, ... }:
+{ lib, fetchurl, ... }:
 let
   version = "1.7.3.0";
 in fetchurl {
diff --git a/pkgs/development/libraries/psol/generic.nix b/pkgs/development/libraries/psol/generic.nix
index 57784c3a5028..aa2522a5dad1 100644
--- a/pkgs/development/libraries/psol/generic.nix
+++ b/pkgs/development/libraries/psol/generic.nix
@@ -1,4 +1,4 @@
-{ fetchzip, lib, stdenv }:
+{ fetchzip, lib }:
 { version, sha256 }:
 { inherit version; } // fetchzip {
   inherit sha256;
diff --git a/pkgs/development/libraries/qt-5/modules/qtmacextras.nix b/pkgs/development/libraries/qt-5/modules/qtmacextras.nix
index 6639e4c8d697..5e7ccf702045 100644
--- a/pkgs/development/libraries/qt-5/modules/qtmacextras.nix
+++ b/pkgs/development/libraries/qt-5/modules/qtmacextras.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, qtModule, qtbase }:
+{ lib, qtModule, qtbase }:
 
 qtModule {
   name = "qtmacextras";
diff --git a/pkgs/development/libraries/qtstyleplugins/default.nix b/pkgs/development/libraries/qtstyleplugins/default.nix
index 84d7f46a2b29..4587bf461624 100644
--- a/pkgs/development/libraries/qtstyleplugins/default.nix
+++ b/pkgs/development/libraries/qtstyleplugins/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, qmake, pkg-config, gtk2 }:
+{ lib, mkDerivation, fetchFromGitHub, qmake, pkg-config, gtk2 }:
 
 mkDerivation {
   name = "qtstyleplugins-2017-03-11";
diff --git a/pkgs/development/libraries/scriptaculous/default.nix b/pkgs/development/libraries/scriptaculous/default.nix
index c2beda45ab3a..e3c8ea00f446 100644
--- a/pkgs/development/libraries/scriptaculous/default.nix
+++ b/pkgs/development/libraries/scriptaculous/default.nix
@@ -1,4 +1,6 @@
-{ lib, stdenv, fetchurl, unzip, ... }: stdenv.mkDerivation rec {
+{ lib, stdenv, fetchurl, unzip, ... }:
+
+stdenv.mkDerivation rec {
   pname = "scriptaculous";
   version = "1.9.0";
 
diff --git a/pkgs/development/libraries/smarty3-i18n/default.nix b/pkgs/development/libraries/smarty3-i18n/default.nix
index 7fb6b1adb5a8..e617ba58e8b4 100644
--- a/pkgs/development/libraries/smarty3-i18n/default.nix
+++ b/pkgs/development/libraries/smarty3-i18n/default.nix
@@ -1,4 +1,6 @@
-{ lib, stdenv, fetchFromGitHub, ... }: stdenv.mkDerivation rec {
+{ lib, stdenv, fetchFromGitHub, ... }:
+
+stdenv.mkDerivation rec {
   pname = "smarty-i18n";
   version = "1.0";
 
diff --git a/pkgs/development/libraries/smarty3/default.nix b/pkgs/development/libraries/smarty3/default.nix
index 2070a3bab790..29f640dedfcb 100644
--- a/pkgs/development/libraries/smarty3/default.nix
+++ b/pkgs/development/libraries/smarty3/default.nix
@@ -1,4 +1,6 @@
-{ lib, stdenv, fetchFromGitHub, ... }: stdenv.mkDerivation rec {
+{ lib, stdenv, fetchFromGitHub, ... }:
+
+stdenv.mkDerivation rec {
   pname = "smarty3";
   version = "3.1.36";
 
diff --git a/pkgs/development/libraries/stellarsolver/default.nix b/pkgs/development/libraries/stellarsolver/default.nix
index 8badf60d9421..f55c72bd2095 100644
--- a/pkgs/development/libraries/stellarsolver/default.nix
+++ b/pkgs/development/libraries/stellarsolver/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, cmake,
+{ lib, mkDerivation, fetchFromGitHub, cmake,
   qtbase, cfitsio, gsl, wcslib, withTester ? false }:
 
 mkDerivation rec {
diff --git a/pkgs/development/libraries/vapoursynth/editor.nix b/pkgs/development/libraries/vapoursynth/editor.nix
index 76b50a10907e..f9ebed197522 100644
--- a/pkgs/development/libraries/vapoursynth/editor.nix
+++ b/pkgs/development/libraries/vapoursynth/editor.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromBitbucket
+{ lib, mkDerivation, fetchFromBitbucket
 , python3, vapoursynth
 , qmake, qtbase, qtwebsockets
 }:
diff --git a/pkgs/development/lua-modules/generated-packages.nix b/pkgs/development/lua-modules/generated-packages.nix
index 8ec44d17016a..85f392285841 100644
--- a/pkgs/development/lua-modules/generated-packages.nix
+++ b/pkgs/development/lua-modules/generated-packages.nix
@@ -5,7 +5,7 @@ nixpkgs$ maintainers/scripts/update-luarocks-packages pkgs/development/lua-modul
 
 These packages are manually refined in lua-overrides.nix
 */
-{ self, stdenv, lib, fetchurl, fetchgit, pkgs, ... } @ args:
+{ self, lib, fetchurl, fetchgit, pkgs, ... } @ args:
 self: super:
 with self;
 {
diff --git a/pkgs/development/misc/haskell/hasura/ci-info/default.nix b/pkgs/development/misc/haskell/hasura/ci-info/default.nix
index 55b070a9f773..2770e74a6988 100644
--- a/pkgs/development/misc/haskell/hasura/ci-info/default.nix
+++ b/pkgs/development/misc/haskell/hasura/ci-info/default.nix
@@ -1,5 +1,5 @@
 { mkDerivation, aeson, aeson-casing, base, fetchgit, hashable
-, hpack, lib, stdenv, template-haskell, text, th-lift-instances
+, hpack, lib, template-haskell, text, th-lift-instances
 , unordered-containers
 }:
 mkDerivation {
diff --git a/pkgs/development/misc/haskell/hasura/graphql-engine/default.nix b/pkgs/development/misc/haskell/hasura/graphql-engine/default.nix
index 3cf840c15e15..9e7d448e4c1e 100644
--- a/pkgs/development/misc/haskell/hasura/graphql-engine/default.nix
+++ b/pkgs/development/misc/haskell/hasura/graphql-engine/default.nix
@@ -13,7 +13,7 @@
 , optparse-applicative, pem, pg-client, postgresql-binary
 , postgresql-libpq, process, profunctors, psqueues, QuickCheck
 , regex-tdfa, safe, scientific, semver, shakespeare, split
-, Spock-core, lib, stdenv, stm, stm-containers, template-haskell, text
+, Spock-core, lib, stm, stm-containers, template-haskell, text
 , text-builder, text-conversions, th-lift-instances, these, time
 , transformers, transformers-base, unix, unordered-containers
 , uri-encode, uuid, vector, wai, wai-websockets, warp, websockets
diff --git a/pkgs/development/misc/haskell/hasura/graphql-parser/default.nix b/pkgs/development/misc/haskell/hasura/graphql-parser/default.nix
index 82314a7485ba..dbd3edf00641 100644
--- a/pkgs/development/misc/haskell/hasura/graphql-parser/default.nix
+++ b/pkgs/development/misc/haskell/hasura/graphql-parser/default.nix
@@ -1,6 +1,6 @@
 { mkDerivation, aeson, attoparsec, base, bytestring, containers
 , criterion, fetchgit, filepath, hedgehog, hpack, prettyprinter
-, protolude, regex-tdfa, scientific, lib, stdenv, template-haskell, text
+, protolude, regex-tdfa, scientific, lib, template-haskell, text
 , text-builder, th-lift-instances, unordered-containers, vector
 }:
 mkDerivation {
diff --git a/pkgs/development/misc/haskell/hasura/pg-client/default.nix b/pkgs/development/misc/haskell/hasura/pg-client/default.nix
index aa780abd8e99..bccb3f6eda3d 100644
--- a/pkgs/development/misc/haskell/hasura/pg-client/default.nix
+++ b/pkgs/development/misc/haskell/hasura/pg-client/default.nix
@@ -2,7 +2,7 @@
 , criterion, fetchgit, file-embed, hashable, hashtables, hasql
 , hasql-pool, hasql-transaction, monad-control, mtl
 , postgresql-binary, postgresql-libpq, resource-pool, retry
-, scientific, lib, stdenv, template-haskell, text, text-builder, th-lift
+, scientific, lib, template-haskell, text, text-builder, th-lift
 , th-lift-instances, time, transformers-base, uuid, vector
 }:
 mkDerivation {
diff --git a/pkgs/development/misc/loc/default.nix b/pkgs/development/misc/loc/default.nix
index 74b5ca09d2a2..fb518279d00b 100644
--- a/pkgs/development/misc/loc/default.nix
+++ b/pkgs/development/misc/loc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 with rustPlatform;
 
diff --git a/pkgs/development/ocaml-modules/janestreet/variantslib.nix b/pkgs/development/ocaml-modules/janestreet/variantslib.nix
index 3fd7877d2bb4..053ab412f88d 100644
--- a/pkgs/development/ocaml-modules/janestreet/variantslib.nix
+++ b/pkgs/development/ocaml-modules/janestreet/variantslib.nix
@@ -1,4 +1,4 @@
-{lib, stdenv, buildOcamlJane, type_conv}:
+{lib, buildOcamlJane, type_conv}:
 
 buildOcamlJane {
   name = "variantslib";
diff --git a/pkgs/development/ocaml-modules/kafka/default.nix b/pkgs/development/ocaml-modules/kafka/default.nix
index d1ebe95be89d..66055dca66e6 100644
--- a/pkgs/development/ocaml-modules/kafka/default.nix
+++ b/pkgs/development/ocaml-modules/kafka/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildDunePackage, base, cmdliner, ocaml_lwt,
+{ lib, fetchFromGitHub, buildDunePackage, base, cmdliner, ocaml_lwt,
   rdkafka, zlib }:
 
 buildDunePackage rec {
diff --git a/pkgs/development/ocaml-modules/parany/default.nix b/pkgs/development/ocaml-modules/parany/default.nix
index 34e14959e327..afe9e7d39b57 100644
--- a/pkgs/development/ocaml-modules/parany/default.nix
+++ b/pkgs/development/ocaml-modules/parany/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildDunePackage, fetchFromGitHub, ocamlnet, cpu }:
+{ lib, buildDunePackage, fetchFromGitHub, ocamlnet, cpu }:
 
 buildDunePackage rec {
   pname = "parany";
diff --git a/pkgs/development/ocaml-modules/phylogenetics/default.nix b/pkgs/development/ocaml-modules/phylogenetics/default.nix
index d3d6097b4462..b284f7ef5eba 100644
--- a/pkgs/development/ocaml-modules/phylogenetics/default.nix
+++ b/pkgs/development/ocaml-modules/phylogenetics/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildDunePackage, fetchFromGitHub, ppx_deriving
+{ lib, buildDunePackage, fetchFromGitHub, ppx_deriving
 , alcotest, angstrom-unix, biocaml, gnuplot, gsl, lacaml, menhir, owl, printbox }:
 
 buildDunePackage rec {
diff --git a/pkgs/development/ocaml-modules/wtf8/default.nix b/pkgs/development/ocaml-modules/wtf8/default.nix
index b46386b1666f..828df66b41d5 100644
--- a/pkgs/development/ocaml-modules/wtf8/default.nix
+++ b/pkgs/development/ocaml-modules/wtf8/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, buildDunePackage }:
+{ lib, fetchurl, buildDunePackage }:
 
 buildDunePackage rec {
   pname = "wtf8";
diff --git a/pkgs/development/perl-modules/MNI/default.nix b/pkgs/development/perl-modules/MNI/default.nix
index c0fc8f281085..2ef7b90842ea 100644
--- a/pkgs/development/perl-modules/MNI/default.nix
+++ b/pkgs/development/perl-modules/MNI/default.nix
@@ -1,4 +1,4 @@
-{ fetchFromGitHub, buildPerlPackage, lib, stdenv }:
+{ fetchFromGitHub, buildPerlPackage, lib }:
 
 buildPerlPackage {
   pname = "MNI-Perllib";
diff --git a/pkgs/development/perl-modules/Percona-Toolkit/default.nix b/pkgs/development/perl-modules/Percona-Toolkit/default.nix
index 3c555ca37ab5..5efac53f8375 100644
--- a/pkgs/development/perl-modules/Percona-Toolkit/default.nix
+++ b/pkgs/development/perl-modules/Percona-Toolkit/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPerlPackage, shortenPerlShebang
+{ lib, fetchFromGitHub, buildPerlPackage, shortenPerlShebang
 , DBDmysql, DBI, IOSocketSSL, TermReadKey
 }:
 
diff --git a/pkgs/development/perl-modules/maatkit/default.nix b/pkgs/development/perl-modules/maatkit/default.nix
index 29bcc9bab25f..d6945083f634 100644
--- a/pkgs/development/perl-modules/maatkit/default.nix
+++ b/pkgs/development/perl-modules/maatkit/default.nix
@@ -1,4 +1,4 @@
-{buildPerlPackage, lib, stdenv, fetchurl, DBDmysql}:
+{buildPerlPackage, lib, fetchurl, DBDmysql}:
 
 buildPerlPackage {
   pname = "maatkit";
diff --git a/pkgs/development/python-modules/FormEncode/default.nix b/pkgs/development/python-modules/FormEncode/default.nix
index 2b06fcdce7d2..74884f36f033 100644
--- a/pkgs/development/python-modules/FormEncode/default.nix
+++ b/pkgs/development/python-modules/FormEncode/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, dnspython, pycountry, nose, setuptools_scm, six, isPy27 }:
+{ lib, buildPythonPackage, fetchPypi, dnspython, pycountry, nose, setuptools_scm, six, isPy27 }:
 
 buildPythonPackage rec {
   pname = "FormEncode";
diff --git a/pkgs/development/python-modules/HTSeq/default.nix b/pkgs/development/python-modules/HTSeq/default.nix
index be4bb9e31d32..486f8a4556f5 100644
--- a/pkgs/development/python-modules/HTSeq/default.nix
+++ b/pkgs/development/python-modules/HTSeq/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, cython, numpy, pysam, matplotlib, python, isPy27, isPy3k }:
+{ lib, buildPythonPackage, fetchFromGitHub, cython, numpy, pysam, matplotlib, python, isPy27, isPy3k }:
 buildPythonPackage rec {
   version = "0.12.4";
   pname = "HTSeq";
diff --git a/pkgs/development/python-modules/IPy/default.nix b/pkgs/development/python-modules/IPy/default.nix
index f142c2459223..05587ef07401 100644
--- a/pkgs/development/python-modules/IPy/default.nix
+++ b/pkgs/development/python-modules/IPy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, nose }:
+{ lib, buildPythonPackage, fetchPypi, nose }:
 
 buildPythonPackage rec {
   pname = "IPy";
diff --git a/pkgs/development/python-modules/PyLD/default.nix b/pkgs/development/python-modules/PyLD/default.nix
index 247b7f0332f5..5a4741a730ac 100644
--- a/pkgs/development/python-modules/PyLD/default.nix
+++ b/pkgs/development/python-modules/PyLD/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, python, requests, gnugrep }:
+{ lib, buildPythonPackage, fetchFromGitHub, python, requests, gnugrep }:
 
 let
 
diff --git a/pkgs/development/python-modules/ROPGadget/default.nix b/pkgs/development/python-modules/ROPGadget/default.nix
index ebedb3c69693..8c34e75139f6 100644
--- a/pkgs/development/python-modules/ROPGadget/default.nix
+++ b/pkgs/development/python-modules/ROPGadget/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , capstone}:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/Wand/default.nix b/pkgs/development/python-modules/Wand/default.nix
index d7ad28c01336..e180f0cea332 100644
--- a/pkgs/development/python-modules/Wand/default.nix
+++ b/pkgs/development/python-modules/Wand/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , imagemagick7Big
diff --git a/pkgs/development/python-modules/WazeRouteCalculator/default.nix b/pkgs/development/python-modules/WazeRouteCalculator/default.nix
index 28515e6f6028..6da500413f0e 100644
--- a/pkgs/development/python-modules/WazeRouteCalculator/default.nix
+++ b/pkgs/development/python-modules/WazeRouteCalculator/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , requests }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/aadict/default.nix b/pkgs/development/python-modules/aadict/default.nix
index cf6976fa6c1e..de3ec6fa7f05 100644
--- a/pkgs/development/python-modules/aadict/default.nix
+++ b/pkgs/development/python-modules/aadict/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/aafigure/default.nix b/pkgs/development/python-modules/aafigure/default.nix
index 5350443eeaab..0b9f14571781 100644
--- a/pkgs/development/python-modules/aafigure/default.nix
+++ b/pkgs/development/python-modules/aafigure/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pillow }:
+{ lib, buildPythonPackage, fetchPypi, pillow }:
 
 buildPythonPackage rec {
   pname = "aafigure";
diff --git a/pkgs/development/python-modules/acebinf/default.nix b/pkgs/development/python-modules/acebinf/default.nix
index f8134aaf5b31..7889e007d83e 100644
--- a/pkgs/development/python-modules/acebinf/default.nix
+++ b/pkgs/development/python-modules/acebinf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pyvcf
diff --git a/pkgs/development/python-modules/acme-tiny/default.nix b/pkgs/development/python-modules/acme-tiny/default.nix
index 75408244e66a..c979104914da 100644
--- a/pkgs/development/python-modules/acme-tiny/default.nix
+++ b/pkgs/development/python-modules/acme-tiny/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, setuptools_scm, fusepy, fuse
+{ lib, buildPythonPackage, fetchPypi, setuptools_scm, fusepy, fuse
 , openssl }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/actdiag/default.nix b/pkgs/development/python-modules/actdiag/default.nix
index ca47018f56f4..92917f6ea954 100644
--- a/pkgs/development/python-modules/actdiag/default.nix
+++ b/pkgs/development/python-modules/actdiag/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , nose, docutils, blockdiag, reportlab }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/adal/default.nix b/pkgs/development/python-modules/adal/default.nix
index f7e973c8f693..55dc21240ec2 100644
--- a/pkgs/development/python-modules/adal/default.nix
+++ b/pkgs/development/python-modules/adal/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , requests, pyjwt, dateutil }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/aenum/default.nix b/pkgs/development/python-modules/aenum/default.nix
index f21d8f4195a4..4f30eefbf900 100644
--- a/pkgs/development/python-modules/aenum/default.nix
+++ b/pkgs/development/python-modules/aenum/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, python, isPy3k, glibcLocales }:
+{ lib, fetchPypi, buildPythonPackage, python, isPy3k, glibcLocales }:
 
 buildPythonPackage rec {
   pname = "aenum";
diff --git a/pkgs/development/python-modules/agate-dbf/default.nix b/pkgs/development/python-modules/agate-dbf/default.nix
index 099fb1701cb4..0299a94ebb0f 100644
--- a/pkgs/development/python-modules/agate-dbf/default.nix
+++ b/pkgs/development/python-modules/agate-dbf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, agate, dbf, dbfread }:
+{ lib, fetchPypi, buildPythonPackage, agate, dbf, dbfread }:
 
 buildPythonPackage rec {
     pname = "agate-dbf";
diff --git a/pkgs/development/python-modules/agate-sql/default.nix b/pkgs/development/python-modules/agate-sql/default.nix
index 566951ea71d1..29bbfa81ed23 100644
--- a/pkgs/development/python-modules/agate-sql/default.nix
+++ b/pkgs/development/python-modules/agate-sql/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, agate, sqlalchemy, crate }:
+{ lib, fetchPypi, buildPythonPackage, agate, sqlalchemy, crate }:
 
 buildPythonPackage rec {
     pname = "agate-sql";
diff --git a/pkgs/development/python-modules/aiobotocore/default.nix b/pkgs/development/python-modules/aiobotocore/default.nix
index 308219865393..2e7c9c2401c3 100644
--- a/pkgs/development/python-modules/aiobotocore/default.nix
+++ b/pkgs/development/python-modules/aiobotocore/default.nix
@@ -1,5 +1,5 @@
 { lib
-, stdenv
+
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
diff --git a/pkgs/development/python-modules/aiodns/default.nix b/pkgs/development/python-modules/aiodns/default.nix
index 4ba4bd59af27..1adc6f815244 100644
--- a/pkgs/development/python-modules/aiodns/default.nix
+++ b/pkgs/development/python-modules/aiodns/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pythonOlder
+{ lib, buildPythonPackage, fetchPypi, pythonOlder
 , isPy27, isPyPy, python, pycares, typing, trollius }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/aioeventlet/default.nix b/pkgs/development/python-modules/aioeventlet/default.nix
index 4bdd2b1327cd..0d6796706cbd 100644
--- a/pkgs/development/python-modules/aioeventlet/default.nix
+++ b/pkgs/development/python-modules/aioeventlet/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , eventlet
diff --git a/pkgs/development/python-modules/aioitertools/default.nix b/pkgs/development/python-modules/aioitertools/default.nix
index 1c5ce1e2faeb..91d83e93cbd8 100644
--- a/pkgs/development/python-modules/aioitertools/default.nix
+++ b/pkgs/development/python-modules/aioitertools/default.nix
@@ -1,5 +1,5 @@
 { lib
-, stdenv
+
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
diff --git a/pkgs/development/python-modules/aioredis/default.nix b/pkgs/development/python-modules/aioredis/default.nix
index 94f503fe2cc3..fe48ba0e1e18 100644
--- a/pkgs/development/python-modules/aioredis/default.nix
+++ b/pkgs/development/python-modules/aioredis/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , pkgs, async-timeout, hiredis, isPyPy, isPy27
 }:
 
diff --git a/pkgs/development/python-modules/aiozeroconf/default.nix b/pkgs/development/python-modules/aiozeroconf/default.nix
index d73ae2b35dfb..fe3943c25b1c 100644
--- a/pkgs/development/python-modules/aiozeroconf/default.nix
+++ b/pkgs/development/python-modules/aiozeroconf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , netifaces
diff --git a/pkgs/development/python-modules/ajpy/default.nix b/pkgs/development/python-modules/ajpy/default.nix
index 0dd135e139fd..926b5ed7efee 100644
--- a/pkgs/development/python-modules/ajpy/default.nix
+++ b/pkgs/development/python-modules/ajpy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "ajpy";
diff --git a/pkgs/development/python-modules/alabaster/default.nix b/pkgs/development/python-modules/alabaster/default.nix
index b4cc69e555bc..72eda332f951 100644
--- a/pkgs/development/python-modules/alabaster/default.nix
+++ b/pkgs/development/python-modules/alabaster/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , pygments }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/alarmdecoder/default.nix b/pkgs/development/python-modules/alarmdecoder/default.nix
index b563a80447f2..10438d540816 100644
--- a/pkgs/development/python-modules/alarmdecoder/default.nix
+++ b/pkgs/development/python-modules/alarmdecoder/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, pyserial, pyftdi, pyusb
+{ lib, buildPythonPackage, fetchFromGitHub, pyserial, pyftdi, pyusb
 , pyopenssl, nose, isPy3k, pythonOlder, mock }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/alembic/default.nix b/pkgs/development/python-modules/alembic/default.nix
index 142c6d1c416c..5a4ef5e0bc6e 100644
--- a/pkgs/development/python-modules/alembic/default.nix
+++ b/pkgs/development/python-modules/alembic/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , pytest, pytestcov, mock, coverage, setuptools
 , Mako, sqlalchemy, python-editor, dateutil
 }:
diff --git a/pkgs/development/python-modules/alerta-server/default.nix b/pkgs/development/python-modules/alerta-server/default.nix
index dd2d82578ea2..82783dd16bb5 100644
--- a/pkgs/development/python-modules/alerta-server/default.nix
+++ b/pkgs/development/python-modules/alerta-server/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pythonOlder
+{ lib, buildPythonPackage, fetchPypi, pythonOlder
 , bcrypt, blinker, flask, flask-compress, flask-cors, mohawk, psycopg2, pyjwt, pymongo, python-dateutil, pytz, pyyaml, requests, requests-hawk, sentry-sdk
 }:
 
diff --git a/pkgs/development/python-modules/alerta/default.nix b/pkgs/development/python-modules/alerta/default.nix
index 19dd17ee3f02..e69503777d4e 100644
--- a/pkgs/development/python-modules/alerta/default.nix
+++ b/pkgs/development/python-modules/alerta/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , six, click, requests, requests-hawk, pytz, tabulate, pythonOlder
 }:
 
diff --git a/pkgs/development/python-modules/alot/default.nix b/pkgs/development/python-modules/alot/default.nix
index 21c6aaff2fbc..1f4617ce9c0d 100644
--- a/pkgs/development/python-modules/alot/default.nix
+++ b/pkgs/development/python-modules/alot/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonPackage, python, fetchFromGitHub, fetchpatch, isPy3k
+{ lib, buildPythonPackage, python, fetchFromGitHub, fetchpatch, isPy3k
 , notmuch, urwid, urwidtrees, twisted, python_magic, configobj, mock, file, gpgme
 , service-identity
 , gnupg ? null, sphinx, awk ? null, procps ? null, future ? null
diff --git a/pkgs/development/python-modules/altair/default.nix b/pkgs/development/python-modules/altair/default.nix
index a3b515ebeca8..37c1efd9c1b6 100644
--- a/pkgs/development/python-modules/altair/default.nix
+++ b/pkgs/development/python-modules/altair/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy27
+{ lib, buildPythonPackage, fetchPypi, isPy27
 , entrypoints
 , glibcLocales
 , ipython
diff --git a/pkgs/development/python-modules/amazon_kclpy/default.nix b/pkgs/development/python-modules/amazon_kclpy/default.nix
index ed266c0db788..44dc739f1ca8 100644
--- a/pkgs/development/python-modules/amazon_kclpy/default.nix
+++ b/pkgs/development/python-modules/amazon_kclpy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, python, mock, boto, pytest }:
+{ lib, buildPythonPackage, fetchFromGitHub, python, mock, boto, pytest }:
 
 buildPythonPackage rec {
   pname = "amazon_kclpy";
diff --git a/pkgs/development/python-modules/amply/default.nix b/pkgs/development/python-modules/amply/default.nix
index 32bcbb4589ab..0589caf1e6a1 100644
--- a/pkgs/development/python-modules/amply/default.nix
+++ b/pkgs/development/python-modules/amply/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchPypi
 , buildPythonPackage
 , setuptools_scm
diff --git a/pkgs/development/python-modules/amqp/default.nix b/pkgs/development/python-modules/amqp/default.nix
index b614ae453d25..be40465496c9 100644
--- a/pkgs/development/python-modules/amqp/default.nix
+++ b/pkgs/development/python-modules/amqp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytestCheckHook, case, vine }:
+{ lib, buildPythonPackage, fetchPypi, pytestCheckHook, case, vine }:
 
 buildPythonPackage rec {
   pname = "amqp";
diff --git a/pkgs/development/python-modules/amqplib/default.nix b/pkgs/development/python-modules/amqplib/default.nix
index c7b4dc865bb8..430065b7d1f8 100644
--- a/pkgs/development/python-modules/amqplib/default.nix
+++ b/pkgs/development/python-modules/amqplib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, python }:
+{ lib, buildPythonPackage, fetchPypi, python }:
 
 buildPythonPackage rec {
   pname = "amqplib";
diff --git a/pkgs/development/python-modules/aniso8601/default.nix b/pkgs/development/python-modules/aniso8601/default.nix
index 804402a4ca67..538cb11db13f 100644
--- a/pkgs/development/python-modules/aniso8601/default.nix
+++ b/pkgs/development/python-modules/aniso8601/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , dateutil, mock, isPy3k }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/annoy/default.nix b/pkgs/development/python-modules/annoy/default.nix
index 0bd060843809..d5f24492c90a 100644
--- a/pkgs/development/python-modules/annoy/default.nix
+++ b/pkgs/development/python-modules/annoy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , h5py
diff --git a/pkgs/development/python-modules/anonip/default.nix b/pkgs/development/python-modules/anonip/default.nix
index 9c1b3abf9800..0663fddd6fb0 100644
--- a/pkgs/development/python-modules/anonip/default.nix
+++ b/pkgs/development/python-modules/anonip/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonPackage, fetchFromGitHub, ipaddress, isPy27 }:
+{ lib, buildPythonPackage, fetchFromGitHub, ipaddress, isPy27 }:
 
 buildPythonPackage rec {
   pname = "anonip";
diff --git a/pkgs/development/python-modules/ansicolor/default.nix b/pkgs/development/python-modules/ansicolor/default.nix
index 3d96061362e9..99a419a60fae 100644
--- a/pkgs/development/python-modules/ansicolor/default.nix
+++ b/pkgs/development/python-modules/ansicolor/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "ansicolor";
diff --git a/pkgs/development/python-modules/ansicolors/default.nix b/pkgs/development/python-modules/ansicolors/default.nix
index 7d6dd2127e67..fab91690ab23 100644
--- a/pkgs/development/python-modules/ansicolors/default.nix
+++ b/pkgs/development/python-modules/ansicolors/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest }:
+{ lib, buildPythonPackage, fetchPypi, pytest }:
 
 buildPythonPackage rec {
   pname = "ansicolors";
diff --git a/pkgs/development/python-modules/ansiconv/default.nix b/pkgs/development/python-modules/ansiconv/default.nix
index 6a3571960d03..ba0c06f536aa 100644
--- a/pkgs/development/python-modules/ansiconv/default.nix
+++ b/pkgs/development/python-modules/ansiconv/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, pytest }:
+{ lib, buildPythonPackage, fetchFromGitHub, pytest }:
 
 buildPythonPackage rec {
   pname = "ansiconv";
diff --git a/pkgs/development/python-modules/apipkg/default.nix b/pkgs/development/python-modules/apipkg/default.nix
index 604c37b42ba1..10e2369e12ee 100644
--- a/pkgs/development/python-modules/apipkg/default.nix
+++ b/pkgs/development/python-modules/apipkg/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , pytest, setuptools_scm, isPy3k }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/approvaltests/default.nix b/pkgs/development/python-modules/approvaltests/default.nix
index bc47de371288..6f2c55d45cb6 100644
--- a/pkgs/development/python-modules/approvaltests/default.nix
+++ b/pkgs/development/python-modules/approvaltests/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, isPy37, pyperclip }:
+{ lib, buildPythonPackage, fetchFromGitHub, isPy37, pyperclip }:
 
 buildPythonPackage rec {
   version = "0.2.6";
diff --git a/pkgs/development/python-modules/apsw/default.nix b/pkgs/development/python-modules/apsw/default.nix
index de74480765a0..8933d4e91bcc 100644
--- a/pkgs/development/python-modules/apsw/default.nix
+++ b/pkgs/development/python-modules/apsw/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, fetchpatch
+{ lib, buildPythonPackage, fetchFromGitHub, fetchpatch
 , sqlite, isPyPy }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/argh/default.nix b/pkgs/development/python-modules/argh/default.nix
index 0e2beb6a31eb..bbe120ec14fe 100644
--- a/pkgs/development/python-modules/argh/default.nix
+++ b/pkgs/development/python-modules/argh/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/args/default.nix b/pkgs/development/python-modules/args/default.nix
index cb349484f276..9faf16037d04 100644
--- a/pkgs/development/python-modules/args/default.nix
+++ b/pkgs/development/python-modules/args/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "args";
diff --git a/pkgs/development/python-modules/aria2p/default.nix b/pkgs/development/python-modules/aria2p/default.nix
index 076fec8c56ba..2bb950beb282 100644
--- a/pkgs/development/python-modules/aria2p/default.nix
+++ b/pkgs/development/python-modules/aria2p/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, pythonOlder
+{ lib, buildPythonPackage, fetchFromGitHub, pythonOlder
 , aria2, poetry, pytest, pytestcov, pytest_xdist, responses
 , asciimatics, loguru, requests, setuptools, websocket_client
 }:
diff --git a/pkgs/development/python-modules/arrow/default.nix b/pkgs/development/python-modules/arrow/default.nix
index 7dbe3b98fca3..d87f1ede3ccd 100644
--- a/pkgs/development/python-modules/arrow/default.nix
+++ b/pkgs/development/python-modules/arrow/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonPackage, fetchPypi, isPy27
+{ lib, buildPythonPackage, fetchPypi, isPy27
 , nose, chai, simplejson, backports_functools_lru_cache
 , python-dateutil, pytz, pytest-mock, sphinx, dateparser, pytestcov
 , pytestCheckHook
diff --git a/pkgs/development/python-modules/asana/default.nix b/pkgs/development/python-modules/asana/default.nix
index ed5e441df970..c7839f051478 100644
--- a/pkgs/development/python-modules/asana/default.nix
+++ b/pkgs/development/python-modules/asana/default.nix
@@ -1,5 +1,5 @@
 { buildPythonPackage, pythonAtLeast, pytest, requests, requests_oauthlib, six
-, fetchFromGitHub, responses, lib, stdenv
+, fetchFromGitHub, responses, lib
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/asn1ate/default.nix b/pkgs/development/python-modules/asn1ate/default.nix
index 2735bbf2f70f..a141fc746f78 100644
--- a/pkgs/development/python-modules/asn1ate/default.nix
+++ b/pkgs/development/python-modules/asn1ate/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, pyparsing }:
+{ lib, buildPythonPackage, fetchFromGitHub, pyparsing }:
 
 buildPythonPackage rec {
   pname = "asn1ate";
diff --git a/pkgs/development/python-modules/astral/default.nix b/pkgs/development/python-modules/astral/default.nix
index 4ea53e17eb0e..8c97ef6750f7 100644
--- a/pkgs/development/python-modules/astral/default.nix
+++ b/pkgs/development/python-modules/astral/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy27, pytz, requests, pytest, freezegun }:
+{ lib, buildPythonPackage, fetchPypi, isPy27, pytz, requests, pytest, freezegun }:
 
 buildPythonPackage rec {
   pname = "astral";
diff --git a/pkgs/development/python-modules/astunparse/default.nix b/pkgs/development/python-modules/astunparse/default.nix
index c9001da5c70f..b32df24f5bbd 100644
--- a/pkgs/development/python-modules/astunparse/default.nix
+++ b/pkgs/development/python-modules/astunparse/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchPypi
 , buildPythonPackage
 , six
diff --git a/pkgs/development/python-modules/asyncssh/default.nix b/pkgs/development/python-modules/asyncssh/default.nix
index d3684ea57200..9271adeb617f 100644
--- a/pkgs/development/python-modules/asyncssh/default.nix
+++ b/pkgs/development/python-modules/asyncssh/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pythonOlder
+{ lib, buildPythonPackage, fetchPypi, pythonOlder
 , cryptography
 , bcrypt, gssapi, libnacl, libsodium, nettle, pyopenssl
 , openssl, openssh, pytestCheckHook }:
diff --git a/pkgs/development/python-modules/atomiclong/default.nix b/pkgs/development/python-modules/atomiclong/default.nix
index 7bcb36d548d8..0fccc943c8a4 100644
--- a/pkgs/development/python-modules/atomiclong/default.nix
+++ b/pkgs/development/python-modules/atomiclong/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest, cffi }:
+{ lib, buildPythonPackage, fetchPypi, pytest, cffi }:
 
 buildPythonPackage rec {
   pname = "atomiclong";
diff --git a/pkgs/development/python-modules/atomicwrites/default.nix b/pkgs/development/python-modules/atomicwrites/default.nix
index e958b0f16d62..5335c044cd27 100644
--- a/pkgs/development/python-modules/atomicwrites/default.nix
+++ b/pkgs/development/python-modules/atomicwrites/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest }:
+{ lib, buildPythonPackage, fetchPypi, pytest }:
 
 buildPythonPackage rec {
   pname = "atomicwrites";
diff --git a/pkgs/development/python-modules/atomman/default.nix b/pkgs/development/python-modules/atomman/default.nix
index 147d2e77debc..b576504588aa 100644
--- a/pkgs/development/python-modules/atomman/default.nix
+++ b/pkgs/development/python-modules/atomman/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, isPy27
+{ lib, buildPythonPackage, fetchFromGitHub, isPy27
 , cython
 , datamodeldict
 , matplotlib
diff --git a/pkgs/development/python-modules/atsim_potentials/default.nix b/pkgs/development/python-modules/atsim_potentials/default.nix
index 6b8b8dccef81..4802ea867b7b 100644
--- a/pkgs/development/python-modules/atsim_potentials/default.nix
+++ b/pkgs/development/python-modules/atsim_potentials/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , configparser
diff --git a/pkgs/development/python-modules/attrdict/default.nix b/pkgs/development/python-modules/attrdict/default.nix
index 5c7514f9da63..cb87b9027f04 100644
--- a/pkgs/development/python-modules/attrdict/default.nix
+++ b/pkgs/development/python-modules/attrdict/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, coverage, nose, six }:
+{ lib, buildPythonPackage, fetchPypi, coverage, nose, six }:
 
 buildPythonPackage rec {
   pname = "attrdict";
diff --git a/pkgs/development/python-modules/authlib/default.nix b/pkgs/development/python-modules/authlib/default.nix
index 3e6faae9af09..4fa14a60ff83 100644
--- a/pkgs/development/python-modules/authlib/default.nix
+++ b/pkgs/development/python-modules/authlib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , pytest
diff --git a/pkgs/development/python-modules/authres/default.nix b/pkgs/development/python-modules/authres/default.nix
index c3d0402d48d1..196e573717b7 100644
--- a/pkgs/development/python-modules/authres/default.nix
+++ b/pkgs/development/python-modules/authres/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, python }:
+{ lib, fetchPypi, buildPythonPackage, python }:
 
 buildPythonPackage rec {
   pname = "authres";
diff --git a/pkgs/development/python-modules/autograd/default.nix b/pkgs/development/python-modules/autograd/default.nix
index fef97a7a6f48..0bdee21b69c2 100644
--- a/pkgs/development/python-modules/autograd/default.nix
+++ b/pkgs/development/python-modules/autograd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, numpy, future }:
+{ lib, buildPythonPackage, fetchPypi, numpy, future }:
 
 buildPythonPackage rec {
   pname = "autograd";
diff --git a/pkgs/development/python-modules/autologging/default.nix b/pkgs/development/python-modules/autologging/default.nix
index 7cd66dc2c3fe..fdd935303d02 100644
--- a/pkgs/development/python-modules/autologging/default.nix
+++ b/pkgs/development/python-modules/autologging/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "Autologging";
diff --git a/pkgs/development/python-modules/automat/default.nix b/pkgs/development/python-modules/automat/default.nix
index fa395f119ee5..20f54870e1f9 100644
--- a/pkgs/development/python-modules/automat/default.nix
+++ b/pkgs/development/python-modules/automat/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi,
+{ lib, buildPythonPackage, fetchPypi,
   m2r, setuptools_scm, six, attrs }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/autopep8/default.nix b/pkgs/development/python-modules/autopep8/default.nix
index afeaef406611..c748c0cb8c1a 100644
--- a/pkgs/development/python-modules/autopep8/default.nix
+++ b/pkgs/development/python-modules/autopep8/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, pycodestyle, glibcLocales
+{ lib, fetchPypi, buildPythonPackage, pycodestyle, glibcLocales
 , toml
 }:
 
diff --git a/pkgs/development/python-modules/avro-python3/default.nix b/pkgs/development/python-modules/avro-python3/default.nix
index 3e9a0e492d3c..e0294246fb2d 100644
--- a/pkgs/development/python-modules/avro-python3/default.nix
+++ b/pkgs/development/python-modules/avro-python3/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k, pycodestyle, isort }:
+{ lib, buildPythonPackage, fetchPypi, isPy3k, pycodestyle, isort }:
 
 buildPythonPackage rec {
   pname = "avro-python3";
diff --git a/pkgs/development/python-modules/avro/default.nix b/pkgs/development/python-modules/avro/default.nix
index 35cab724a862..5a38e86eee37 100644
--- a/pkgs/development/python-modules/avro/default.nix
+++ b/pkgs/development/python-modules/avro/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, isPy3k, fetchPypi, pycodestyle, isort }:
+{ lib, buildPythonPackage, isPy3k, fetchPypi, pycodestyle, isort }:
 
 buildPythonPackage rec {
   pname = "avro";
diff --git a/pkgs/development/python-modules/avro3k/default.nix b/pkgs/development/python-modules/avro3k/default.nix
index b600bc75c7a3..f6ad9bf086cc 100644
--- a/pkgs/development/python-modules/avro3k/default.nix
+++ b/pkgs/development/python-modules/avro3k/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k }:
+{ lib, buildPythonPackage, fetchPypi, isPy3k }:
 
 buildPythonPackage rec {
   pname = "avro3k";
diff --git a/pkgs/development/python-modules/awesome-slugify/default.nix b/pkgs/development/python-modules/awesome-slugify/default.nix
index 00882cb08279..47ca9859b5e7 100644
--- a/pkgs/development/python-modules/awesome-slugify/default.nix
+++ b/pkgs/development/python-modules/awesome-slugify/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, unidecode, regex, python }:
+{ lib, buildPythonPackage, fetchPypi, unidecode, regex, python }:
 
 buildPythonPackage rec {
   pname = "awesome-slugify";
diff --git a/pkgs/development/python-modules/b2sdk/default.nix b/pkgs/development/python-modules/b2sdk/default.nix
index da43f6e5690e..cd695132d7ae 100644
--- a/pkgs/development/python-modules/b2sdk/default.nix
+++ b/pkgs/development/python-modules/b2sdk/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, setuptools_scm, isPy27, pytestCheckHook
+{ lib, buildPythonPackage, fetchPypi, setuptools_scm, isPy27, pytestCheckHook
 , requests, arrow, logfury, tqdm }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/babelfish/default.nix b/pkgs/development/python-modules/babelfish/default.nix
index 5ac044292156..ba015f597ce6 100644
--- a/pkgs/development/python-modules/babelfish/default.nix
+++ b/pkgs/development/python-modules/babelfish/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, setuptools }:
+{ lib, buildPythonPackage, fetchPypi, setuptools }:
 
 buildPythonPackage rec {
   pname = "babelfish";
diff --git a/pkgs/development/python-modules/babelgladeextractor/default.nix b/pkgs/development/python-modules/babelgladeextractor/default.nix
index 0df03754127b..b1516d1abdb8 100644
--- a/pkgs/development/python-modules/babelgladeextractor/default.nix
+++ b/pkgs/development/python-modules/babelgladeextractor/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , isPy3k
 , buildPythonPackage
 , fetchPypi
diff --git a/pkgs/development/python-modules/backports-shutil-which/default.nix b/pkgs/development/python-modules/backports-shutil-which/default.nix
index 5fe922b90462..52163abe8bcf 100644
--- a/pkgs/development/python-modules/backports-shutil-which/default.nix
+++ b/pkgs/development/python-modules/backports-shutil-which/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, pytest }:
+{ lib, fetchPypi, buildPythonPackage, pytest }:
 
 buildPythonPackage rec {
   pname = "backports.shutil_which";
diff --git a/pkgs/development/python-modules/backports_csv/default.nix b/pkgs/development/python-modules/backports_csv/default.nix
index 5216149ddc2c..6086178c9597 100644
--- a/pkgs/development/python-modules/backports_csv/default.nix
+++ b/pkgs/development/python-modules/backports_csv/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, future }:
+{ lib, buildPythonPackage, fetchPypi, future }:
 
 buildPythonPackage rec {
 
diff --git a/pkgs/development/python-modules/backports_os/default.nix b/pkgs/development/python-modules/backports_os/default.nix
index b3e231bcd05d..39973e433eed 100644
--- a/pkgs/development/python-modules/backports_os/default.nix
+++ b/pkgs/development/python-modules/backports_os/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , setuptools_scm
diff --git a/pkgs/development/python-modules/backports_unittest-mock/default.nix b/pkgs/development/python-modules/backports_unittest-mock/default.nix
index 08f98de79f27..a9950eb704f8 100644
--- a/pkgs/development/python-modules/backports_unittest-mock/default.nix
+++ b/pkgs/development/python-modules/backports_unittest-mock/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, setuptools_scm, mock }:
+{ lib, buildPythonPackage, fetchPypi, setuptools_scm, mock }:
 
 buildPythonPackage rec {
   pname = "backports.unittest_mock";
diff --git a/pkgs/development/python-modules/backports_weakref/default.nix b/pkgs/development/python-modules/backports_weakref/default.nix
index 9770fb45981d..c04b88a3f328 100644
--- a/pkgs/development/python-modules/backports_weakref/default.nix
+++ b/pkgs/development/python-modules/backports_weakref/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , setuptools_scm
diff --git a/pkgs/development/python-modules/bacpypes/default.nix b/pkgs/development/python-modules/bacpypes/default.nix
index 59542e61c56b..f07c5e90d517 100644
--- a/pkgs/development/python-modules/bacpypes/default.nix
+++ b/pkgs/development/python-modules/bacpypes/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, fetchFromGitHub
+{ lib, buildPythonPackage, fetchPypi, fetchFromGitHub
 , wheel, pytestCheckHook, pytestrunner }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/bap/default.nix b/pkgs/development/python-modules/bap/default.nix
index d2575afb77d2..03abf67f86a0 100644
--- a/pkgs/development/python-modules/bap/default.nix
+++ b/pkgs/development/python-modules/bap/default.nix
@@ -1,4 +1,4 @@
-{lib, stdenv, buildPythonPackage, fetchFromGitHub, bap, requests}:
+{lib, buildPythonPackage, fetchFromGitHub, bap, requests}:
 
 buildPythonPackage rec {
   pname = "bap";
diff --git a/pkgs/development/python-modules/base58/default.nix b/pkgs/development/python-modules/base58/default.nix
index a36727429ca7..1e1da32f6c9f 100644
--- a/pkgs/development/python-modules/base58/default.nix
+++ b/pkgs/development/python-modules/base58/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, isPy27, pytest, pyhamcrest }:
+{ lib, fetchPypi, buildPythonPackage, isPy27, pytest, pyhamcrest }:
 
 buildPythonPackage rec {
   pname = "base58";
diff --git a/pkgs/development/python-modules/basemap/default.nix b/pkgs/development/python-modules/basemap/default.nix
index c97548bdee88..2fadda388ba0 100644
--- a/pkgs/development/python-modules/basemap/default.nix
+++ b/pkgs/development/python-modules/basemap/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , numpy
diff --git a/pkgs/development/python-modules/batinfo/default.nix b/pkgs/development/python-modules/batinfo/default.nix
index 0ed3486272d3..17d28c129141 100644
--- a/pkgs/development/python-modules/batinfo/default.nix
+++ b/pkgs/development/python-modules/batinfo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "batinfo";
diff --git a/pkgs/development/python-modules/bayespy/default.nix b/pkgs/development/python-modules/bayespy/default.nix
index b470d21b1bea..6ebe9919ec9b 100644
--- a/pkgs/development/python-modules/bayespy/default.nix
+++ b/pkgs/development/python-modules/bayespy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pythonOlder
+{ lib, buildPythonPackage, fetchPypi, pythonOlder
 , pytest, nose, glibcLocales
 , numpy, scipy, matplotlib, h5py }:
 
diff --git a/pkgs/development/python-modules/bcdoc/default.nix b/pkgs/development/python-modules/bcdoc/default.nix
index 185fcb86b0b7..29c267aa45fb 100644
--- a/pkgs/development/python-modules/bcdoc/default.nix
+++ b/pkgs/development/python-modules/bcdoc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, docutils, six }:
+{ lib, buildPythonPackage, fetchPypi, docutils, six }:
 
 buildPythonPackage rec {
   pname = "bcdoc";
diff --git a/pkgs/development/python-modules/bcrypt/3_1.nix b/pkgs/development/python-modules/bcrypt/3_1.nix
index c70161cf28b0..df57eb3cd0c9 100644
--- a/pkgs/development/python-modules/bcrypt/3_1.nix
+++ b/pkgs/development/python-modules/bcrypt/3_1.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , isPyPy, cffi, pytest, six }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/bcrypt/default.nix b/pkgs/development/python-modules/bcrypt/default.nix
index e74b0934b308..cfd17262a2b3 100644
--- a/pkgs/development/python-modules/bcrypt/default.nix
+++ b/pkgs/development/python-modules/bcrypt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, isPyPy, fetchPypi, pythonOlder
+{ lib, buildPythonPackage, isPyPy, fetchPypi, pythonOlder
 , cffi, pycparser, mock, pytest, py, six }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/beancount/default.nix b/pkgs/development/python-modules/beancount/default.nix
index fa97c7c97a94..e4a6a5f5625e 100644
--- a/pkgs/development/python-modules/beancount/default.nix
+++ b/pkgs/development/python-modules/beancount/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k
+{ lib, buildPythonPackage, fetchPypi, isPy3k
 , beautifulsoup4, bottle, chardet, dateutil
 , google_api_python_client, lxml, oauth2client
 , ply, python_magic, pytest, requests }:
diff --git a/pkgs/development/python-modules/beanstalkc/default.nix b/pkgs/development/python-modules/beanstalkc/default.nix
index a74f6c6f8f28..ffdb2f6f8f2a 100644
--- a/pkgs/development/python-modules/beanstalkc/default.nix
+++ b/pkgs/development/python-modules/beanstalkc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonPackage }:
+{ lib, fetchFromGitHub, buildPythonPackage }:
 
 buildPythonPackage rec {
   pname = "beanstalkc";
diff --git a/pkgs/development/python-modules/beautifulsoup4/default.nix b/pkgs/development/python-modules/beautifulsoup4/default.nix
index 555669da243e..b00c03a09c14 100644
--- a/pkgs/development/python-modules/beautifulsoup4/default.nix
+++ b/pkgs/development/python-modules/beautifulsoup4/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, soupsieve, pytest, python }:
+{ lib, buildPythonPackage, fetchPypi, soupsieve, pytest, python }:
 
 buildPythonPackage rec {
   pname = "beautifulsoup4";
diff --git a/pkgs/development/python-modules/bedup/default.nix b/pkgs/development/python-modules/bedup/default.nix
index f38d4263c248..454a972f177b 100644
--- a/pkgs/development/python-modules/bedup/default.nix
+++ b/pkgs/development/python-modules/bedup/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , btrfs-progs
diff --git a/pkgs/development/python-modules/bellows/default.nix b/pkgs/development/python-modules/bellows/default.nix
index 6ee8b6499b58..d47c5d716a73 100644
--- a/pkgs/development/python-modules/bellows/default.nix
+++ b/pkgs/development/python-modules/bellows/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub
+{ lib, buildPythonPackage, fetchFromGitHub
 , click, click-log, pure-pcapy3
 , pyserial-asyncio, voluptuous, zigpy
 , asynctest, pytestCheckHook, pytest-asyncio }:
diff --git a/pkgs/development/python-modules/bespon/default.nix b/pkgs/development/python-modules/bespon/default.nix
index 555a0a487581..599ad71b2411 100644
--- a/pkgs/development/python-modules/bespon/default.nix
+++ b/pkgs/development/python-modules/bespon/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/betamax-matchers/default.nix b/pkgs/development/python-modules/betamax-matchers/default.nix
index 424b8ef4ef36..459d3c51d7ed 100644
--- a/pkgs/development/python-modules/betamax-matchers/default.nix
+++ b/pkgs/development/python-modules/betamax-matchers/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , betamax, requests_toolbelt }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/betamax-serializers/default.nix b/pkgs/development/python-modules/betamax-serializers/default.nix
index 3d3cad4d95b5..0ddc9845bfa7 100644
--- a/pkgs/development/python-modules/betamax-serializers/default.nix
+++ b/pkgs/development/python-modules/betamax-serializers/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , betamax, pyyaml }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/betamax/default.nix b/pkgs/development/python-modules/betamax/default.nix
index 5e1469bfc52d..5906a531f22d 100644
--- a/pkgs/development/python-modules/betamax/default.nix
+++ b/pkgs/development/python-modules/betamax/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, requests }:
+{ lib, buildPythonPackage, fetchPypi, requests }:
 
 buildPythonPackage rec {
   pname = "betamax";
diff --git a/pkgs/development/python-modules/billiard/default.nix b/pkgs/development/python-modules/billiard/default.nix
index 4f8aa3565da2..2d4eabf215ea 100644
--- a/pkgs/development/python-modules/billiard/default.nix
+++ b/pkgs/development/python-modules/billiard/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPyPy, pytestCheckHook, case, psutil, fetchpatch }:
+{ lib, buildPythonPackage, fetchPypi, isPyPy, pytestCheckHook, case, psutil, fetchpatch }:
 
 buildPythonPackage rec {
   pname = "billiard";
diff --git a/pkgs/development/python-modules/binwalk/default.nix b/pkgs/development/python-modules/binwalk/default.nix
index c2f059dd93dc..499d442c8224 100644
--- a/pkgs/development/python-modules/binwalk/default.nix
+++ b/pkgs/development/python-modules/binwalk/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , zlib
diff --git a/pkgs/development/python-modules/bitbucket-api/default.nix b/pkgs/development/python-modules/bitbucket-api/default.nix
index 559661bbb4f3..b874f1af525a 100644
--- a/pkgs/development/python-modules/bitbucket-api/default.nix
+++ b/pkgs/development/python-modules/bitbucket-api/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k
+{ lib, buildPythonPackage, fetchPypi, isPy3k
 , requests_oauthlib, nose, sh }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/bitbucket-cli/default.nix b/pkgs/development/python-modules/bitbucket-cli/default.nix
index 50075fe70fce..bb1fa1d6c17c 100644
--- a/pkgs/development/python-modules/bitbucket-cli/default.nix
+++ b/pkgs/development/python-modules/bitbucket-cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k, requests }:
+{ lib, buildPythonPackage, fetchPypi, isPy3k, requests }:
 
 buildPythonPackage rec {
   pname = "bitbucket-cli";
diff --git a/pkgs/development/python-modules/bitmath/default.nix b/pkgs/development/python-modules/bitmath/default.nix
index 49992c561f73..5643ea29bc2a 100644
--- a/pkgs/development/python-modules/bitmath/default.nix
+++ b/pkgs/development/python-modules/bitmath/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k, progressbar231, progressbar33, mock }:
+{ lib, buildPythonPackage, fetchPypi, isPy3k, progressbar231, progressbar33, mock }:
 
 buildPythonPackage rec {
   pname = "bitmath";
diff --git a/pkgs/development/python-modules/bitstring/default.nix b/pkgs/development/python-modules/bitstring/default.nix
index d6eaf31056ff..ed67f2be5c5f 100644
--- a/pkgs/development/python-modules/bitstring/default.nix
+++ b/pkgs/development/python-modules/bitstring/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "bitstring";
diff --git a/pkgs/development/python-modules/bjoern/default.nix b/pkgs/development/python-modules/bjoern/default.nix
index 2949ecbf6f92..ef599d89be2b 100644
--- a/pkgs/development/python-modules/bjoern/default.nix
+++ b/pkgs/development/python-modules/bjoern/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, libev, python }:
+{ lib, buildPythonPackage, fetchPypi, libev, python }:
 
 buildPythonPackage rec {
   pname = "bjoern";
diff --git a/pkgs/development/python-modules/black-macchiato/default.nix b/pkgs/development/python-modules/black-macchiato/default.nix
index 536ad1f14b66..80aed4e6fef5 100644
--- a/pkgs/development/python-modules/black-macchiato/default.nix
+++ b/pkgs/development/python-modules/black-macchiato/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv,
+{ lib,
   buildPythonPackage,
   fetchFromGitHub,
   pythonOlder,
diff --git a/pkgs/development/python-modules/bleak/default.nix b/pkgs/development/python-modules/bleak/default.nix
index 06dc3217dc87..38390e8377e9 100644
--- a/pkgs/development/python-modules/bleak/default.nix
+++ b/pkgs/development/python-modules/bleak/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, isPy3k, fetchPypi, bluez, txdbus, pytest, pytestcov }:
+{ lib, buildPythonPackage, isPy3k, fetchPypi, bluez, txdbus, pytest, pytestcov }:
 
 buildPythonPackage rec {
   pname = "bleak";
diff --git a/pkgs/development/python-modules/blessed/default.nix b/pkgs/development/python-modules/blessed/default.nix
index 7adacecc647a..f0167625cf64 100644
--- a/pkgs/development/python-modules/blessed/default.nix
+++ b/pkgs/development/python-modules/blessed/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, fetchpatch, six
+{ lib, buildPythonPackage, fetchPypi, fetchpatch, six
 , wcwidth, pytest, mock, glibcLocales
 }:
 
diff --git a/pkgs/development/python-modules/blessings/default.nix b/pkgs/development/python-modules/blessings/default.nix
index 5263a92ec3d9..00b7fd9a63d7 100644
--- a/pkgs/development/python-modules/blessings/default.nix
+++ b/pkgs/development/python-modules/blessings/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/blinker/default.nix b/pkgs/development/python-modules/blinker/default.nix
index e33ad1626318..5591113ab0ad 100644
--- a/pkgs/development/python-modules/blinker/default.nix
+++ b/pkgs/development/python-modules/blinker/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "blinker";
diff --git a/pkgs/development/python-modules/blis/default.nix b/pkgs/development/python-modules/blis/default.nix
index eeb62e8fed32..2b8aeb2edcd3 100644
--- a/pkgs/development/python-modules/blis/default.nix
+++ b/pkgs/development/python-modules/blis/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , cython
diff --git a/pkgs/development/python-modules/blist/default.nix b/pkgs/development/python-modules/blist/default.nix
index 505f01af5fe4..d4dcb54c5cd1 100644
--- a/pkgs/development/python-modules/blist/default.nix
+++ b/pkgs/development/python-modules/blist/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchpatch
 , fetchPypi
diff --git a/pkgs/development/python-modules/blivet/default.nix b/pkgs/development/python-modules/blivet/default.nix
index 94abc39fd285..fd97fa206480 100644
--- a/pkgs/development/python-modules/blivet/default.nix
+++ b/pkgs/development/python-modules/blivet/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonPackage, pykickstart, pyparted, pyblock
+{ lib, fetchFromGitHub, buildPythonPackage, pykickstart, pyparted, pyblock
 , pyudev, six, libselinux, multipath-tools, lsof, util-linux
 }:
 
diff --git a/pkgs/development/python-modules/block-io/default.nix b/pkgs/development/python-modules/block-io/default.nix
index 3a9704d71bc5..b823b8711a53 100644
--- a/pkgs/development/python-modules/block-io/default.nix
+++ b/pkgs/development/python-modules/block-io/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, base58, ecdsa, pycryptodome, requests, six, setuptools }:
+{ lib, fetchPypi, buildPythonPackage, base58, ecdsa, pycryptodome, requests, six, setuptools }:
 
 buildPythonPackage rec {
   pname = "block-io";
diff --git a/pkgs/development/python-modules/blockdiag/default.nix b/pkgs/development/python-modules/blockdiag/default.nix
index 5adc854d0263..f5d8b93c4816 100644
--- a/pkgs/development/python-modules/blockdiag/default.nix
+++ b/pkgs/development/python-modules/blockdiag/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub
+{ lib, buildPythonPackage, fetchFromGitHub
 , setuptools, funcparserlib, pillow, webcolors, reportlab, docutils
 }:
 
diff --git a/pkgs/development/python-modules/bluepy/default.nix b/pkgs/development/python-modules/bluepy/default.nix
index d833d20934d6..11930050ba34 100644
--- a/pkgs/development/python-modules/bluepy/default.nix
+++ b/pkgs/development/python-modules/bluepy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pkg-config
diff --git a/pkgs/development/python-modules/boltons/default.nix b/pkgs/development/python-modules/boltons/default.nix
index 13e264340da1..f4842981c4a7 100644
--- a/pkgs/development/python-modules/boltons/default.nix
+++ b/pkgs/development/python-modules/boltons/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, pytest }:
+{ lib, buildPythonPackage, fetchFromGitHub, pytest }:
 
 buildPythonPackage rec {
   pname = "boltons";
diff --git a/pkgs/development/python-modules/boltztrap2/default.nix b/pkgs/development/python-modules/boltztrap2/default.nix
index 48bc53bbeeda..f80a8deb9ab4 100644
--- a/pkgs/development/python-modules/boltztrap2/default.nix
+++ b/pkgs/development/python-modules/boltztrap2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , spglib
diff --git a/pkgs/development/python-modules/bottle/default.nix b/pkgs/development/python-modules/bottle/default.nix
index 213d69dd9890..eeaf34a44ebc 100644
--- a/pkgs/development/python-modules/bottle/default.nix
+++ b/pkgs/development/python-modules/bottle/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, setuptools }:
+{ lib, buildPythonPackage, fetchPypi, setuptools }:
 
 buildPythonPackage rec {
   pname = "bottle";
diff --git a/pkgs/development/python-modules/box2d/default.nix b/pkgs/development/python-modules/box2d/default.nix
index 92ac90ab6d4d..e6f6a390f374 100644
--- a/pkgs/development/python-modules/box2d/default.nix
+++ b/pkgs/development/python-modules/box2d/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , swig2
diff --git a/pkgs/development/python-modules/bpython/default.nix b/pkgs/development/python-modules/bpython/default.nix
index 108d8ec0c66b..8a37ed0bd978 100644
--- a/pkgs/development/python-modules/bpython/default.nix
+++ b/pkgs/development/python-modules/bpython/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , curtsies
diff --git a/pkgs/development/python-modules/bsddb3/default.nix b/pkgs/development/python-modules/bsddb3/default.nix
index 9877a03a087e..82459398ca73 100644
--- a/pkgs/development/python-modules/bsddb3/default.nix
+++ b/pkgs/development/python-modules/bsddb3/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pkgs
diff --git a/pkgs/development/python-modules/bsdiff4/default.nix b/pkgs/development/python-modules/bsdiff4/default.nix
index f70f71c1a699..339e649c53af 100644
--- a/pkgs/development/python-modules/bsdiff4/default.nix
+++ b/pkgs/development/python-modules/bsdiff4/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , aflplusplus
diff --git a/pkgs/development/python-modules/bt-proximity/default.nix b/pkgs/development/python-modules/bt-proximity/default.nix
index 209565fa21b7..8ac1b977f392 100644
--- a/pkgs/development/python-modules/bt-proximity/default.nix
+++ b/pkgs/development/python-modules/bt-proximity/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub
+{ lib, buildPythonPackage, fetchFromGitHub
 , pybluez }:
 
 buildPythonPackage {
diff --git a/pkgs/development/python-modules/btchip/default.nix b/pkgs/development/python-modules/btchip/default.nix
index ebb14a77b564..3d206c829e8b 100644
--- a/pkgs/development/python-modules/btchip/default.nix
+++ b/pkgs/development/python-modules/btchip/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, hidapi, pyscard, ecdsa }:
+{ lib, buildPythonPackage, fetchPypi, hidapi, pyscard, ecdsa }:
 
 buildPythonPackage rec {
   pname = "btchip-python";
diff --git a/pkgs/development/python-modules/btrees/default.nix b/pkgs/development/python-modules/btrees/default.nix
index 471ba54215de..3da6852c54df 100644
--- a/pkgs/development/python-modules/btrees/default.nix
+++ b/pkgs/development/python-modules/btrees/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchPypi
 , buildPythonPackage
 , persistent
diff --git a/pkgs/development/python-modules/btrfs/default.nix b/pkgs/development/python-modules/btrfs/default.nix
index 8ea93fe005e7..adaf1f610e35 100644
--- a/pkgs/development/python-modules/btrfs/default.nix
+++ b/pkgs/development/python-modules/btrfs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/bugsnag/default.nix b/pkgs/development/python-modules/bugsnag/default.nix
index 5e3b0b4e89f7..338453684806 100644
--- a/pkgs/development/python-modules/bugsnag/default.nix
+++ b/pkgs/development/python-modules/bugsnag/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
diff --git a/pkgs/development/python-modules/bugwarrior/default.nix b/pkgs/development/python-modules/bugwarrior/default.nix
index 3d27384efe18..c59d2196d207 100644
--- a/pkgs/development/python-modules/bugwarrior/default.nix
+++ b/pkgs/development/python-modules/bugwarrior/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pythonOlder, setuptools
+{ lib, buildPythonPackage, fetchPypi, pythonOlder, setuptools
 , twiggy, requests, offtrac, bugzilla, taskw, dateutil, pytz, keyring, six
 , jinja2, pycurl, dogpile_cache, lockfile, click, pyxdg, future, jira }:
 
diff --git a/pkgs/development/python-modules/bugz/default.nix b/pkgs/development/python-modules/bugz/default.nix
index 5324a43e1b0c..a57e957efe67 100644
--- a/pkgs/development/python-modules/bugz/default.nix
+++ b/pkgs/development/python-modules/bugz/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 }:
diff --git a/pkgs/development/python-modules/bugzilla/default.nix b/pkgs/development/python-modules/bugzilla/default.nix
index fc122ecd233c..365f36542985 100644
--- a/pkgs/development/python-modules/bugzilla/default.nix
+++ b/pkgs/development/python-modules/bugzilla/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , pep8, coverage, logilab_common, requests }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/buildout/default.nix b/pkgs/development/python-modules/buildout/default.nix
index 0751b284a786..a9fe66a37ea2 100644
--- a/pkgs/development/python-modules/buildout/default.nix
+++ b/pkgs/development/python-modules/buildout/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "zc.buildout";
diff --git a/pkgs/development/python-modules/bumps/default.nix b/pkgs/development/python-modules/bumps/default.nix
index 05f082c747bd..7e94bd55b28f 100644
--- a/pkgs/development/python-modules/bumps/default.nix
+++ b/pkgs/development/python-modules/bumps/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, six}:
+{ lib, buildPythonPackage, fetchPypi, six}:
 
 buildPythonPackage rec {
   pname = "bumps";
diff --git a/pkgs/development/python-modules/bunch/default.nix b/pkgs/development/python-modules/bunch/default.nix
index ce77085e4f7f..2758ff5b4185 100644
--- a/pkgs/development/python-modules/bunch/default.nix
+++ b/pkgs/development/python-modules/bunch/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "bunch";
diff --git a/pkgs/development/python-modules/bwapy/default.nix b/pkgs/development/python-modules/bwapy/default.nix
index c736eb577d44..f6c926cf419a 100644
--- a/pkgs/development/python-modules/bwapy/default.nix
+++ b/pkgs/development/python-modules/bwapy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , pythonOlder
 , fetchPypi
diff --git a/pkgs/development/python-modules/cachecontrol/default.nix b/pkgs/development/python-modules/cachecontrol/default.nix
index 53b13ddb5685..ba9b9022ac80 100644
--- a/pkgs/development/python-modules/cachecontrol/default.nix
+++ b/pkgs/development/python-modules/cachecontrol/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , requests
diff --git a/pkgs/development/python-modules/cachelib/default.nix b/pkgs/development/python-modules/cachelib/default.nix
index 503b546116ef..154c67bb379f 100644
--- a/pkgs/development/python-modules/cachelib/default.nix
+++ b/pkgs/development/python-modules/cachelib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "cachelib";
diff --git a/pkgs/development/python-modules/cachetools/default.nix b/pkgs/development/python-modules/cachetools/default.nix
index 6fd3f637875d..56efa9a34852 100644
--- a/pkgs/development/python-modules/cachetools/default.nix
+++ b/pkgs/development/python-modules/cachetools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy27 }:
+{ lib, buildPythonPackage, fetchPypi, isPy27 }:
 
 buildPythonPackage rec {
   pname = "cachetools";
diff --git a/pkgs/development/python-modules/cairosvg/1_x.nix b/pkgs/development/python-modules/cairosvg/1_x.nix
index bb5629cf4e51..3e1a67f8282b 100644
--- a/pkgs/development/python-modules/cairosvg/1_x.nix
+++ b/pkgs/development/python-modules/cairosvg/1_x.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, cairocffi, nose, fontconfig
+{ lib, buildPythonPackage, fetchFromGitHub, cairocffi, nose, fontconfig
 , cssselect2, defusedxml, pillow, tinycss2 }:
 
 # CairoSVG 2.x dropped support for Python 2 so offer CairoSVG 1.x as an
diff --git a/pkgs/development/python-modules/cairosvg/default.nix b/pkgs/development/python-modules/cairosvg/default.nix
index 9d1c54651c20..53f3ebc0c088 100644
--- a/pkgs/development/python-modules/cairosvg/default.nix
+++ b/pkgs/development/python-modules/cairosvg/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k, fetchpatch
+{ lib, buildPythonPackage, fetchPypi, isPy3k, fetchpatch
 , cairocffi, cssselect2, defusedxml, pillow, tinycss2
 , pytest, pytestrunner, pytestcov, pytest-flake8, pytest-isort }:
 
diff --git a/pkgs/development/python-modules/canonicaljson/default.nix b/pkgs/development/python-modules/canonicaljson/default.nix
index 96af6f4bf78f..4a4f56f5abf5 100644
--- a/pkgs/development/python-modules/canonicaljson/default.nix
+++ b/pkgs/development/python-modules/canonicaljson/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , frozendict, simplejson, six, isPy27
 }:
 
diff --git a/pkgs/development/python-modules/carbon/default.nix b/pkgs/development/python-modules/carbon/default.nix
index e0a31829b05f..b651a654d5ec 100644
--- a/pkgs/development/python-modules/carbon/default.nix
+++ b/pkgs/development/python-modules/carbon/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k
+{ lib, buildPythonPackage, fetchPypi, isPy3k
 , twisted, whisper, txamqp, cachetools, urllib3
 }:
 
diff --git a/pkgs/development/python-modules/carrot/default.nix b/pkgs/development/python-modules/carrot/default.nix
index c2262decd314..a772535ad82b 100644
--- a/pkgs/development/python-modules/carrot/default.nix
+++ b/pkgs/development/python-modules/carrot/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , nose, amqplib, anyjson }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/case/default.nix b/pkgs/development/python-modules/case/default.nix
index 5d1a7696516a..3f95d9e22afc 100644
--- a/pkgs/development/python-modules/case/default.nix
+++ b/pkgs/development/python-modules/case/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , six, nose, unittest2, mock }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/cassandra-driver/default.nix b/pkgs/development/python-modules/cassandra-driver/default.nix
index 32cf844cf00c..e1cb9f211bc2 100644
--- a/pkgs/development/python-modules/cassandra-driver/default.nix
+++ b/pkgs/development/python-modules/cassandra-driver/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonPackage, fetchPypi, python, pythonOlder
+{ lib, buildPythonPackage, fetchPypi, python, pythonOlder
 , cython
 , eventlet
 , futures
diff --git a/pkgs/development/python-modules/casttube/default.nix b/pkgs/development/python-modules/casttube/default.nix
index 85b1147c13a5..9d29a0137436 100644
--- a/pkgs/development/python-modules/casttube/default.nix
+++ b/pkgs/development/python-modules/casttube/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, requests }:
+{ lib, buildPythonPackage, fetchPypi, requests }:
 
 buildPythonPackage rec {
   pname = "casttube";
diff --git a/pkgs/development/python-modules/catalogue/default.nix b/pkgs/development/python-modules/catalogue/default.nix
index c4cd89cab68a..a9c5bae71f4d 100644
--- a/pkgs/development/python-modules/catalogue/default.nix
+++ b/pkgs/development/python-modules/catalogue/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
diff --git a/pkgs/development/python-modules/cbor/default.nix b/pkgs/development/python-modules/cbor/default.nix
index f081511265fd..cc3d8914ad2f 100644
--- a/pkgs/development/python-modules/cbor/default.nix
+++ b/pkgs/development/python-modules/cbor/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "cbor";
diff --git a/pkgs/development/python-modules/cccolutils/default.nix b/pkgs/development/python-modules/cccolutils/default.nix
index 96e75405ee3c..e231624e40f8 100644
--- a/pkgs/development/python-modules/cccolutils/default.nix
+++ b/pkgs/development/python-modules/cccolutils/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k, krb5Full, nose, GitPython, mock, git }:
+{ lib, buildPythonPackage, fetchPypi, isPy3k, krb5Full, nose, GitPython, mock, git }:
 
 buildPythonPackage rec {
   pname = "CCColUtils";
diff --git a/pkgs/development/python-modules/cement/default.nix b/pkgs/development/python-modules/cement/default.nix
index 9133389f0ce9..f021ea16b620 100644
--- a/pkgs/development/python-modules/cement/default.nix
+++ b/pkgs/development/python-modules/cement/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k }:
+{ lib, buildPythonPackage, fetchPypi, isPy3k }:
 
 buildPythonPackage rec {
   pname = "cement";
diff --git a/pkgs/development/python-modules/cerberus/default.nix b/pkgs/development/python-modules/cerberus/default.nix
index 08b7527c54c1..cdf6519d325f 100644
--- a/pkgs/development/python-modules/cerberus/default.nix
+++ b/pkgs/development/python-modules/cerberus/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytestrunner, pytest }:
+{ lib, buildPythonPackage, fetchPypi, pytestrunner, pytest }:
 
 buildPythonPackage rec {
   pname = "Cerberus";
diff --git a/pkgs/development/python-modules/certipy/default.nix b/pkgs/development/python-modules/certipy/default.nix
index 049e3ffdb5d9..a3cde807076f 100644
--- a/pkgs/development/python-modules/certipy/default.nix
+++ b/pkgs/development/python-modules/certipy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pyopenssl
diff --git a/pkgs/development/python-modules/cgroup-utils/default.nix b/pkgs/development/python-modules/cgroup-utils/default.nix
index 2000a4e0a3bc..8b3a6afa9b36 100644
--- a/pkgs/development/python-modules/cgroup-utils/default.nix
+++ b/pkgs/development/python-modules/cgroup-utils/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, pep8, nose }:
+{ lib, buildPythonPackage, fetchFromGitHub, pep8, nose }:
 
 buildPythonPackage rec {
   version = "0.8";
diff --git a/pkgs/development/python-modules/chai/default.nix b/pkgs/development/python-modules/chai/default.nix
index 3400b33635a8..9f9d48d90171 100644
--- a/pkgs/development/python-modules/chai/default.nix
+++ b/pkgs/development/python-modules/chai/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "chai";
diff --git a/pkgs/development/python-modules/chainmap/default.nix b/pkgs/development/python-modules/chainmap/default.nix
index 3858fc44f234..4619bff2b046 100644
--- a/pkgs/development/python-modules/chainmap/default.nix
+++ b/pkgs/development/python-modules/chainmap/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "chainmap";
diff --git a/pkgs/development/python-modules/chameleon/default.nix b/pkgs/development/python-modules/chameleon/default.nix
index a2ffcb9a0236..fccfec53512e 100644
--- a/pkgs/development/python-modules/chameleon/default.nix
+++ b/pkgs/development/python-modules/chameleon/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 }:
diff --git a/pkgs/development/python-modules/channels-redis/default.nix b/pkgs/development/python-modules/channels-redis/default.nix
index 3f341f5527ae..1e267aa51269 100644
--- a/pkgs/development/python-modules/channels-redis/default.nix
+++ b/pkgs/development/python-modules/channels-redis/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , aioredis
 , asgiref
 , buildPythonPackage
diff --git a/pkgs/development/python-modules/channels/default.nix b/pkgs/development/python-modules/channels/default.nix
index c2836ef4faa0..0f5e708d0913 100644
--- a/pkgs/development/python-modules/channels/default.nix
+++ b/pkgs/development/python-modules/channels/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi,
+{ lib, buildPythonPackage, fetchPypi,
   asgiref, django, daphne
 }:
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/chardet/default.nix b/pkgs/development/python-modules/chardet/default.nix
index bbc41df0cd82..65381d40268f 100644
--- a/pkgs/development/python-modules/chardet/default.nix
+++ b/pkgs/development/python-modules/chardet/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, fetchpatch
+{ lib, buildPythonPackage, fetchPypi, fetchpatch
 , pytest, pytestrunner, hypothesis }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/check-manifest/default.nix b/pkgs/development/python-modules/check-manifest/default.nix
index 8a2c74882066..95bb9660d4cf 100644
--- a/pkgs/development/python-modules/check-manifest/default.nix
+++ b/pkgs/development/python-modules/check-manifest/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pep517, toml, mock, breezy, git, build }:
+{ lib, buildPythonPackage, fetchPypi, pep517, toml, mock, breezy, git, build }:
 
 buildPythonPackage rec {
   pname = "check-manifest";
diff --git a/pkgs/development/python-modules/cjson/default.nix b/pkgs/development/python-modules/cjson/default.nix
index ce70a2f459da..d34534e3eb80 100644
--- a/pkgs/development/python-modules/cjson/default.nix
+++ b/pkgs/development/python-modules/cjson/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k, isPyPy }:
+{ lib, buildPythonPackage, fetchPypi, isPy3k, isPyPy }:
 
 buildPythonPackage rec {
   pname = "python-cjson";
diff --git a/pkgs/development/python-modules/ckcc-protocol/default.nix b/pkgs/development/python-modules/ckcc-protocol/default.nix
index dd72f5705e70..eaf89948e8f2 100644
--- a/pkgs/development/python-modules/ckcc-protocol/default.nix
+++ b/pkgs/development/python-modules/ckcc-protocol/default.nix
@@ -1,9 +1,8 @@
-{ stdenv
+{ lib
 , buildPythonPackage
 , click
 , ecdsa
 , hidapi
-, lib
 , fetchPypi
 , pytest
 , pyaes
diff --git a/pkgs/development/python-modules/clf/default.nix b/pkgs/development/python-modules/clf/default.nix
index f4168d689d44..978d08051f7d 100644
--- a/pkgs/development/python-modules/clf/default.nix
+++ b/pkgs/development/python-modules/clf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , docopt, requests, pygments }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/cliapp/default.nix b/pkgs/development/python-modules/cliapp/default.nix
index 4b7611c092e2..e410a37fcb42 100644
--- a/pkgs/development/python-modules/cliapp/default.nix
+++ b/pkgs/development/python-modules/cliapp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchgit
 , sphinx
diff --git a/pkgs/development/python-modules/click-completion/default.nix b/pkgs/development/python-modules/click-completion/default.nix
index 61a154286325..19fdac37615a 100644
--- a/pkgs/development/python-modules/click-completion/default.nix
+++ b/pkgs/development/python-modules/click-completion/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k,
+{ lib, buildPythonPackage, fetchPypi, isPy3k,
   click, jinja2, shellingham, six
 }:
 
diff --git a/pkgs/development/python-modules/click-didyoumean/default.nix b/pkgs/development/python-modules/click-didyoumean/default.nix
index 8d3c3ba3e240..c4574072b4ca 100644
--- a/pkgs/development/python-modules/click-didyoumean/default.nix
+++ b/pkgs/development/python-modules/click-didyoumean/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi,
+{ lib, buildPythonPackage, fetchPypi,
   click
 }:
 
diff --git a/pkgs/development/python-modules/click-help-colors/default.nix b/pkgs/development/python-modules/click-help-colors/default.nix
index dbe4e33ca84c..b17dc1a0c111 100644
--- a/pkgs/development/python-modules/click-help-colors/default.nix
+++ b/pkgs/development/python-modules/click-help-colors/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage
+{ lib, fetchPypi, buildPythonPackage
 , click, pytest
 }:
 
diff --git a/pkgs/development/python-modules/click-log/default.nix b/pkgs/development/python-modules/click-log/default.nix
index 4aa63dd45378..3145d4775e39 100644
--- a/pkgs/development/python-modules/click-log/default.nix
+++ b/pkgs/development/python-modules/click-log/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, click }:
+{ lib, buildPythonPackage, fetchPypi, click }:
 
 buildPythonPackage rec {
   pname = "click-log";
diff --git a/pkgs/development/python-modules/click-plugins/default.nix b/pkgs/development/python-modules/click-plugins/default.nix
index c2b25341e17c..31ae00a348df 100644
--- a/pkgs/development/python-modules/click-plugins/default.nix
+++ b/pkgs/development/python-modules/click-plugins/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi,
+{ lib, buildPythonPackage, fetchPypi,
   click, pytest
 }:
 
diff --git a/pkgs/development/python-modules/click-repl/default.nix b/pkgs/development/python-modules/click-repl/default.nix
index 23adb12da658..ee8773999ff0 100644
--- a/pkgs/development/python-modules/click-repl/default.nix
+++ b/pkgs/development/python-modules/click-repl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, click, prompt_toolkit }:
+{ lib, buildPythonPackage, fetchPypi, click, prompt_toolkit }:
 
 buildPythonPackage rec {
   pname = "click-repl";
diff --git a/pkgs/development/python-modules/clickclick/default.nix b/pkgs/development/python-modules/clickclick/default.nix
index e211b955ac84..d829f43dc0d1 100644
--- a/pkgs/development/python-modules/clickclick/default.nix
+++ b/pkgs/development/python-modules/clickclick/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonPackage, fetchFromGitHub, isPy36, flake8, click, pyyaml, six, pytestCheckHook, pytestcov }:
+{ lib, buildPythonPackage, fetchFromGitHub, isPy36, flake8, click, pyyaml, six, pytestCheckHook, pytestcov }:
 
 buildPythonPackage rec {
   pname = "clickclick";
diff --git a/pkgs/development/python-modules/cligj/default.nix b/pkgs/development/python-modules/cligj/default.nix
index f9d953d8536e..b44f4e0ec170 100644
--- a/pkgs/development/python-modules/cligj/default.nix
+++ b/pkgs/development/python-modules/cligj/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub
+{ lib, buildPythonPackage, fetchFromGitHub
 , click, pytest, glibcLocales
 }:
 
diff --git a/pkgs/development/python-modules/clint/default.nix b/pkgs/development/python-modules/clint/default.nix
index 133fc0de55c6..66e2d5f52f38 100644
--- a/pkgs/development/python-modules/clint/default.nix
+++ b/pkgs/development/python-modules/clint/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , python
diff --git a/pkgs/development/python-modules/clize/default.nix b/pkgs/development/python-modules/clize/default.nix
index c9c3f5c905ce..1418db69a393 100644
--- a/pkgs/development/python-modules/clize/default.nix
+++ b/pkgs/development/python-modules/clize/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , dateutil
diff --git a/pkgs/development/python-modules/closure-linter/default.nix b/pkgs/development/python-modules/closure-linter/default.nix
index 75f5ba0b449e..18782fb50bb1 100644
--- a/pkgs/development/python-modules/closure-linter/default.nix
+++ b/pkgs/development/python-modules/closure-linter/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchgit
 , isPy3k
diff --git a/pkgs/development/python-modules/cloudpickle/default.nix b/pkgs/development/python-modules/cloudpickle/default.nix
index e5b4a63a564e..f525b6e7f1df 100644
--- a/pkgs/development/python-modules/cloudpickle/default.nix
+++ b/pkgs/development/python-modules/cloudpickle/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy27, pytest, mock }:
+{ lib, buildPythonPackage, fetchPypi, isPy27, pytest, mock }:
 
 buildPythonPackage rec {
   pname = "cloudpickle";
diff --git a/pkgs/development/python-modules/clustershell/default.nix b/pkgs/development/python-modules/clustershell/default.nix
index a0e744f9919d..d247cecdfa63 100644
--- a/pkgs/development/python-modules/clustershell/default.nix
+++ b/pkgs/development/python-modules/clustershell/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pyyaml, openssh
+{ lib, buildPythonPackage, fetchPypi, pyyaml, openssh
 , nose, bc, hostname, coreutils, bash, gnused
 }:
 
diff --git a/pkgs/development/python-modules/cmdline/default.nix b/pkgs/development/python-modules/cmdline/default.nix
index 4249ed7164b9..71273ed1a226 100644
--- a/pkgs/development/python-modules/cmdline/default.nix
+++ b/pkgs/development/python-modules/cmdline/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pyyaml }:
+{ lib, buildPythonPackage, fetchPypi, pyyaml }:
 
 buildPythonPackage rec {
   pname = "cmdline";
diff --git a/pkgs/development/python-modules/cmdtest/default.nix b/pkgs/development/python-modules/cmdtest/default.nix
index 5bb4ef79a20c..28d78203b6d4 100644
--- a/pkgs/development/python-modules/cmdtest/default.nix
+++ b/pkgs/development/python-modules/cmdtest/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , cliapp
diff --git a/pkgs/development/python-modules/cocotb/default.nix b/pkgs/development/python-modules/cocotb/default.nix
index e95900d17b52..9cbf86ab1cf2 100644
--- a/pkgs/development/python-modules/cocotb/default.nix
+++ b/pkgs/development/python-modules/cocotb/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, setuptools, swig, verilog }:
+{ lib, buildPythonPackage, fetchFromGitHub, setuptools, swig, verilog }:
 
 buildPythonPackage rec {
   pname = "cocotb";
diff --git a/pkgs/development/python-modules/cogapp/default.nix b/pkgs/development/python-modules/cogapp/default.nix
index 019faeaebc30..c996c23d9ae8 100644
--- a/pkgs/development/python-modules/cogapp/default.nix
+++ b/pkgs/development/python-modules/cogapp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "cogapp";
diff --git a/pkgs/development/python-modules/coilmq/default.nix b/pkgs/development/python-modules/coilmq/default.nix
index bc0b6af146af..b21ea193cbfa 100644
--- a/pkgs/development/python-modules/coilmq/default.nix
+++ b/pkgs/development/python-modules/coilmq/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , stompclient, python-daemon, redis, pid, pytest, six, click, coverage
 , sqlalchemy }:
 
diff --git a/pkgs/development/python-modules/colanderalchemy/default.nix b/pkgs/development/python-modules/colanderalchemy/default.nix
index a5b29af1c31a..a3fa33f327c5 100644
--- a/pkgs/development/python-modules/colanderalchemy/default.nix
+++ b/pkgs/development/python-modules/colanderalchemy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , unittest2
diff --git a/pkgs/development/python-modules/colorama/default.nix b/pkgs/development/python-modules/colorama/default.nix
index 6778c6acadb8..1d472035b2f2 100644
--- a/pkgs/development/python-modules/colorama/default.nix
+++ b/pkgs/development/python-modules/colorama/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage }:
+{ lib, fetchPypi, buildPythonPackage }:
 
 buildPythonPackage rec {
   pname = "colorama";
diff --git a/pkgs/development/python-modules/colorcet/default.nix b/pkgs/development/python-modules/colorcet/default.nix
index 303d244fff33..6198e4e1b281 100644
--- a/pkgs/development/python-modules/colorcet/default.nix
+++ b/pkgs/development/python-modules/colorcet/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , param
diff --git a/pkgs/development/python-modules/colorclass/default.nix b/pkgs/development/python-modules/colorclass/default.nix
index 08da356e222e..50a052ec1f94 100644
--- a/pkgs/development/python-modules/colorclass/default.nix
+++ b/pkgs/development/python-modules/colorclass/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "colorclass";
diff --git a/pkgs/development/python-modules/colored/default.nix b/pkgs/development/python-modules/colored/default.nix
index 5caa0cad2f6f..502f31aa9b8e 100644
--- a/pkgs/development/python-modules/colored/default.nix
+++ b/pkgs/development/python-modules/colored/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/colour/default.nix b/pkgs/development/python-modules/colour/default.nix
index 6a6ad9d4946a..f7419666f535 100644
--- a/pkgs/development/python-modules/colour/default.nix
+++ b/pkgs/development/python-modules/colour/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, d2to1 }:
+{ lib, buildPythonPackage, fetchPypi, d2to1 }:
 
 buildPythonPackage rec {
   pname = "colour";
diff --git a/pkgs/development/python-modules/configobj/default.nix b/pkgs/development/python-modules/configobj/default.nix
index d0988689275e..746c5f35f256 100644
--- a/pkgs/development/python-modules/configobj/default.nix
+++ b/pkgs/development/python-modules/configobj/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage
+{ lib, buildPythonPackage
 , fetchFromGitHub
 , six
 , mock, pytest
diff --git a/pkgs/development/python-modules/configshell/default.nix b/pkgs/development/python-modules/configshell/default.nix
index ba3700962bf6..a41d077f22df 100644
--- a/pkgs/development/python-modules/configshell/default.nix
+++ b/pkgs/development/python-modules/configshell/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonPackage, pyparsing, six, urwid }:
+{ lib, fetchFromGitHub, buildPythonPackage, pyparsing, six, urwid }:
 
 buildPythonPackage rec {
   pname = "configshell";
diff --git a/pkgs/development/python-modules/confluent-kafka/default.nix b/pkgs/development/python-modules/confluent-kafka/default.nix
index f3e8b1c943b1..cd2ddf9da69a 100644
--- a/pkgs/development/python-modules/confluent-kafka/default.nix
+++ b/pkgs/development/python-modules/confluent-kafka/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k, rdkafka, requests, avro3k, avro, futures, enum34 }:
+{ lib, buildPythonPackage, fetchPypi, isPy3k, rdkafka, requests, avro3k, avro, futures, enum34 }:
 
 buildPythonPackage rec {
   version = "1.5.0";
diff --git a/pkgs/development/python-modules/constantly/default.nix b/pkgs/development/python-modules/constantly/default.nix
index 189573699b91..e3a9c642f478 100644
--- a/pkgs/development/python-modules/constantly/default.nix
+++ b/pkgs/development/python-modules/constantly/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 }:
 buildPythonPackage rec {
   pname = "constantly";
diff --git a/pkgs/development/python-modules/consul/default.nix b/pkgs/development/python-modules/consul/default.nix
index 3978b14484ac..a3b92ee72554 100644
--- a/pkgs/development/python-modules/consul/default.nix
+++ b/pkgs/development/python-modules/consul/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , requests, six, pytest }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/contexter/default.nix b/pkgs/development/python-modules/contexter/default.nix
index d8b74d4fedba..9937d4b47526 100644
--- a/pkgs/development/python-modules/contexter/default.nix
+++ b/pkgs/development/python-modules/contexter/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "contexter";
diff --git a/pkgs/development/python-modules/convertdate/default.nix b/pkgs/development/python-modules/convertdate/default.nix
index f28923002f70..60eedd3ec177 100644
--- a/pkgs/development/python-modules/convertdate/default.nix
+++ b/pkgs/development/python-modules/convertdate/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, pymeeus, pytz }:
+{ lib, buildPythonPackage, fetchFromGitHub, pymeeus, pytz }:
 
 buildPythonPackage rec {
   pname = "convertdate";
diff --git a/pkgs/development/python-modules/cookiecutter/default.nix b/pkgs/development/python-modules/cookiecutter/default.nix
index f9a4fe982082..c5ee4d8617d0 100644
--- a/pkgs/development/python-modules/cookiecutter/default.nix
+++ b/pkgs/development/python-modules/cookiecutter/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPyPy
+{ lib, buildPythonPackage, fetchPypi, isPyPy
 , pytest, pytestcov, pytest-mock, freezegun
 , jinja2, future, binaryornot, click, whichcraft, poyo, jinja2_time, requests
 , python-slugify }:
diff --git a/pkgs/development/python-modules/cookies/default.nix b/pkgs/development/python-modules/cookies/default.nix
index 59d2214f758e..a4e35dac346a 100644
--- a/pkgs/development/python-modules/cookies/default.nix
+++ b/pkgs/development/python-modules/cookies/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "cookies";
diff --git a/pkgs/development/python-modules/coreapi/default.nix b/pkgs/development/python-modules/coreapi/default.nix
index 8ac69a457396..8b957fee4f6e 100644
--- a/pkgs/development/python-modules/coreapi/default.nix
+++ b/pkgs/development/python-modules/coreapi/default.nix
@@ -1,5 +1,5 @@
 {
-  lib, stdenv,
+  lib,
   fetchFromGitHub,
   buildPythonPackage,
   django,
diff --git a/pkgs/development/python-modules/coreschema/default.nix b/pkgs/development/python-modules/coreschema/default.nix
index 73167dea8a7d..65bdee5a8da9 100644
--- a/pkgs/development/python-modules/coreschema/default.nix
+++ b/pkgs/development/python-modules/coreschema/default.nix
@@ -1,5 +1,5 @@
 {
-  lib, stdenv,
+  lib,
   fetchFromGitHub,
   buildPythonPackage,
   jinja2,
diff --git a/pkgs/development/python-modules/cornice/default.nix b/pkgs/development/python-modules/cornice/default.nix
index 10c559201931..6c488a271e25 100644
--- a/pkgs/development/python-modules/cornice/default.nix
+++ b/pkgs/development/python-modules/cornice/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pyramid
diff --git a/pkgs/development/python-modules/cov-core/default.nix b/pkgs/development/python-modules/cov-core/default.nix
index 44461a8ca9fb..ce3b08fbc9f4 100644
--- a/pkgs/development/python-modules/cov-core/default.nix
+++ b/pkgs/development/python-modules/cov-core/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, coverage }:
+{ lib, buildPythonPackage, fetchPypi, coverage }:
 
 buildPythonPackage rec {
   pname = "cov-core";
diff --git a/pkgs/development/python-modules/cppheaderparser/default.nix b/pkgs/development/python-modules/cppheaderparser/default.nix
index b51499de449c..7602132c24ae 100644
--- a/pkgs/development/python-modules/cppheaderparser/default.nix
+++ b/pkgs/development/python-modules/cppheaderparser/default.nix
@@ -1,7 +1,7 @@
 { buildPythonPackage
 , fetchPypi
 , ply
-, lib, stdenv
+, lib
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/crate/default.nix b/pkgs/development/python-modules/crate/default.nix
index 37e49210009a..a37160a01acf 100644
--- a/pkgs/development/python-modules/crate/default.nix
+++ b/pkgs/development/python-modules/crate/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchPypi
 , buildPythonPackage
 , urllib3
diff --git a/pkgs/development/python-modules/crayons/default.nix b/pkgs/development/python-modules/crayons/default.nix
index c93bf71687fb..53caec665964 100644
--- a/pkgs/development/python-modules/crayons/default.nix
+++ b/pkgs/development/python-modules/crayons/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, colorama }:
+{ lib, fetchPypi, buildPythonPackage, colorama }:
 
 buildPythonPackage rec {
   pname = "crayons";
diff --git a/pkgs/development/python-modules/crc16/default.nix b/pkgs/development/python-modules/crc16/default.nix
index 1e3c9cbbf4ff..ebf86a3571c6 100644
--- a/pkgs/development/python-modules/crc16/default.nix
+++ b/pkgs/development/python-modules/crc16/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "crc16";
diff --git a/pkgs/development/python-modules/crccheck/default.nix b/pkgs/development/python-modules/crccheck/default.nix
index 8dc038012852..1762d60dfde5 100644
--- a/pkgs/development/python-modules/crccheck/default.nix
+++ b/pkgs/development/python-modules/crccheck/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k
+{ lib, buildPythonPackage, fetchPypi, isPy3k
 , nose }:
 
 let
diff --git a/pkgs/development/python-modules/crcmod/default.nix b/pkgs/development/python-modules/crcmod/default.nix
index 488b723d89fd..082369baf73a 100644
--- a/pkgs/development/python-modules/crcmod/default.nix
+++ b/pkgs/development/python-modules/crcmod/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "crcmod";
diff --git a/pkgs/development/python-modules/credstash/default.nix b/pkgs/development/python-modules/credstash/default.nix
index ca5e1fe334a0..0267aee76100 100644
--- a/pkgs/development/python-modules/credstash/default.nix
+++ b/pkgs/development/python-modules/credstash/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, cryptography, boto3, pyyaml, docutils, pytest, fetchpatch }:
+{ lib, buildPythonPackage, fetchPypi, cryptography, boto3, pyyaml, docutils, pytest, fetchpatch }:
 
 buildPythonPackage rec {
   pname = "credstash";
diff --git a/pkgs/development/python-modules/cryptacular/default.nix b/pkgs/development/python-modules/cryptacular/default.nix
index dc97e96e4f5d..dccfddaea1ae 100644
--- a/pkgs/development/python-modules/cryptacular/default.nix
+++ b/pkgs/development/python-modules/cryptacular/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy27, pythonAtLeast
+{ lib, buildPythonPackage, fetchPypi, isPy27, pythonAtLeast
 , coverage, nose, pbkdf2 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/cssmin/default.nix b/pkgs/development/python-modules/cssmin/default.nix
index a6f6f3c956ae..929640a7c1e8 100644
--- a/pkgs/development/python-modules/cssmin/default.nix
+++ b/pkgs/development/python-modules/cssmin/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "cssmin";
diff --git a/pkgs/development/python-modules/cssselect/default.nix b/pkgs/development/python-modules/cssselect/default.nix
index fe13fa9582ea..04b6dc36afab 100644
--- a/pkgs/development/python-modules/cssselect/default.nix
+++ b/pkgs/development/python-modules/cssselect/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "cssselect";
diff --git a/pkgs/development/python-modules/cssutils/default.nix b/pkgs/development/python-modules/cssutils/default.nix
index ea3ac6236e90..a12fbf48c820 100644
--- a/pkgs/development/python-modules/cssutils/default.nix
+++ b/pkgs/development/python-modules/cssutils/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, mock }:
+{ lib, buildPythonPackage, fetchPypi, mock }:
 
 buildPythonPackage rec {
   pname = "cssutils";
diff --git a/pkgs/development/python-modules/cupy/default.nix b/pkgs/development/python-modules/cupy/default.nix
index 09685d392d6a..23e6ef45b503 100644
--- a/pkgs/development/python-modules/cupy/default.nix
+++ b/pkgs/development/python-modules/cupy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage
+{ lib, buildPythonPackage
 , fetchPypi, isPy3k, linuxPackages
 , fastrlock, numpy, six, wheel, pytest, mock, setuptools
 , cudatoolkit, cudnn, nccl
diff --git a/pkgs/development/python-modules/curtsies/default.nix b/pkgs/development/python-modules/curtsies/default.nix
index 4c4c7dbe231a..62f1435df30e 100644
--- a/pkgs/development/python-modules/curtsies/default.nix
+++ b/pkgs/development/python-modules/curtsies/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, fetchpatch, pythonOlder, blessings, mock, nose, pyte, wcwidth, typing }:
+{ lib, buildPythonPackage, fetchPypi, fetchpatch, pythonOlder, blessings, mock, nose, pyte, wcwidth, typing }:
 
 buildPythonPackage rec {
   pname = "curtsies";
diff --git a/pkgs/development/python-modules/curve25519-donna/default.nix b/pkgs/development/python-modules/curve25519-donna/default.nix
index e42f4021a6f2..7698b5d65710 100644
--- a/pkgs/development/python-modules/curve25519-donna/default.nix
+++ b/pkgs/development/python-modules/curve25519-donna/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "curve25519-donna";
diff --git a/pkgs/development/python-modules/cvxopt/default.nix b/pkgs/development/python-modules/cvxopt/default.nix
index bafa75072f7a..9270effcaa91 100644
--- a/pkgs/development/python-modules/cvxopt/default.nix
+++ b/pkgs/development/python-modules/cvxopt/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPyPy
diff --git a/pkgs/development/python-modules/cx_freeze/default.nix b/pkgs/development/python-modules/cx_freeze/default.nix
index 14a585617c64..1c3ee6892990 100644
--- a/pkgs/development/python-modules/cx_freeze/default.nix
+++ b/pkgs/development/python-modules/cx_freeze/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, pythonOlder, fetchPypi, ncurses, importlib-metadata }:
+{ lib, buildPythonPackage, pythonOlder, fetchPypi, ncurses, importlib-metadata }:
 
 buildPythonPackage rec {
   pname = "cx_Freeze";
diff --git a/pkgs/development/python-modules/cx_oracle/default.nix b/pkgs/development/python-modules/cx_oracle/default.nix
index 89946964544e..c81443e09908 100644
--- a/pkgs/development/python-modules/cx_oracle/default.nix
+++ b/pkgs/development/python-modules/cx_oracle/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, odpic }:
+{ lib, buildPythonPackage, fetchPypi, odpic }:
 
 buildPythonPackage rec {
   pname = "cx_Oracle";
diff --git a/pkgs/development/python-modules/cymem/default.nix b/pkgs/development/python-modules/cymem/default.nix
index d805ba5de1f9..c2de6d82a5bc 100644
--- a/pkgs/development/python-modules/cymem/default.nix
+++ b/pkgs/development/python-modules/cymem/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , cython
diff --git a/pkgs/development/python-modules/cypari2/default.nix b/pkgs/development/python-modules/cypari2/default.nix
index 8a0adb3d6c96..a7115d1e940d 100644
--- a/pkgs/development/python-modules/cypari2/default.nix
+++ b/pkgs/development/python-modules/cypari2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , python
 , fetchPypi
diff --git a/pkgs/development/python-modules/daemonize/default.nix b/pkgs/development/python-modules/daemonize/default.nix
index 30d4f1bd7146..26f23b7156dd 100644
--- a/pkgs/development/python-modules/daemonize/default.nix
+++ b/pkgs/development/python-modules/daemonize/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/darcsver/default.nix b/pkgs/development/python-modules/darcsver/default.nix
index 6484d84253b5..c46337981bd7 100644
--- a/pkgs/development/python-modules/darcsver/default.nix
+++ b/pkgs/development/python-modules/darcsver/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k, mock }:
+{ lib, buildPythonPackage, fetchPypi, isPy3k, mock }:
 
 buildPythonPackage rec {
   pname = "darcsver";
diff --git a/pkgs/development/python-modules/dask-glm/default.nix b/pkgs/development/python-modules/dask-glm/default.nix
index 1db03b66ffb0..86bc2da1565c 100644
--- a/pkgs/development/python-modules/dask-glm/default.nix
+++ b/pkgs/development/python-modules/dask-glm/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , cloudpickle
diff --git a/pkgs/development/python-modules/dask-image/default.nix b/pkgs/development/python-modules/dask-image/default.nix
index eac503c2f855..a3cc7b6afda0 100644
--- a/pkgs/development/python-modules/dask-image/default.nix
+++ b/pkgs/development/python-modules/dask-image/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , fetchpatch
diff --git a/pkgs/development/python-modules/dask-jobqueue/default.nix b/pkgs/development/python-modules/dask-jobqueue/default.nix
index be27399b71f6..f4f5c03858ae 100644
--- a/pkgs/development/python-modules/dask-jobqueue/default.nix
+++ b/pkgs/development/python-modules/dask-jobqueue/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , dask
diff --git a/pkgs/development/python-modules/dask-ml/default.nix b/pkgs/development/python-modules/dask-ml/default.nix
index 4d3aa8e79a05..4836fe35d18b 100644
--- a/pkgs/development/python-modules/dask-ml/default.nix
+++ b/pkgs/development/python-modules/dask-ml/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
diff --git a/pkgs/development/python-modules/dask-mpi/default.nix b/pkgs/development/python-modules/dask-mpi/default.nix
index f2d8737b38e9..1bec4c828728 100644
--- a/pkgs/development/python-modules/dask-mpi/default.nix
+++ b/pkgs/development/python-modules/dask-mpi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , dask
diff --git a/pkgs/development/python-modules/dask-xgboost/default.nix b/pkgs/development/python-modules/dask-xgboost/default.nix
index c60f628d72eb..4e64b8c9f0c5 100644
--- a/pkgs/development/python-modules/dask-xgboost/default.nix
+++ b/pkgs/development/python-modules/dask-xgboost/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , xgboost
diff --git a/pkgs/development/python-modules/databricks-cli/default.nix b/pkgs/development/python-modules/databricks-cli/default.nix
index 30001b781d28..483c565536d5 100644
--- a/pkgs/development/python-modules/databricks-cli/default.nix
+++ b/pkgs/development/python-modules/databricks-cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , click
 , requests
 , tabulate
diff --git a/pkgs/development/python-modules/dataclasses/default.nix b/pkgs/development/python-modules/dataclasses/default.nix
index a88995937d83..c276e9d000b2 100644
--- a/pkgs/development/python-modules/dataclasses/default.nix
+++ b/pkgs/development/python-modules/dataclasses/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy36 }:
+{ lib, buildPythonPackage, fetchPypi, isPy36 }:
 
 buildPythonPackage rec {
   pname = "dataclasses";
diff --git a/pkgs/development/python-modules/datadiff/default.nix b/pkgs/development/python-modules/datadiff/default.nix
index 680462352275..4124457586cc 100644
--- a/pkgs/development/python-modules/datadiff/default.nix
+++ b/pkgs/development/python-modules/datadiff/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/datamodeldict/default.nix b/pkgs/development/python-modules/datamodeldict/default.nix
index f3eab1d1d4e2..551b10962224 100644
--- a/pkgs/development/python-modules/datamodeldict/default.nix
+++ b/pkgs/development/python-modules/datamodeldict/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , xmltodict
diff --git a/pkgs/development/python-modules/dateutil/default.nix b/pkgs/development/python-modules/dateutil/default.nix
index a6aca68ef293..dcad0c3698a7 100644
--- a/pkgs/development/python-modules/dateutil/default.nix
+++ b/pkgs/development/python-modules/dateutil/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, six, setuptools_scm, pytest }:
+{ lib, buildPythonPackage, fetchPypi, six, setuptools_scm, pytest }:
 buildPythonPackage rec {
   pname = "python-dateutil";
   version = "2.8.1";
diff --git a/pkgs/development/python-modules/datrie/default.nix b/pkgs/development/python-modules/datrie/default.nix
index c7f74730c161..d8bbc96fcc48 100644
--- a/pkgs/development/python-modules/datrie/default.nix
+++ b/pkgs/development/python-modules/datrie/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, fetchpatch
+{ lib, buildPythonPackage, fetchPypi, fetchpatch
 , cython, pytest, pytestrunner, hypothesis }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/dbf/default.nix b/pkgs/development/python-modules/dbf/default.nix
index b9c264a20150..18560734bd85 100644
--- a/pkgs/development/python-modules/dbf/default.nix
+++ b/pkgs/development/python-modules/dbf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, aenum, isPy3k, pythonOlder, enum34, python }:
+{ lib, fetchPypi, buildPythonPackage, aenum, isPy3k, pythonOlder, enum34, python }:
 
 buildPythonPackage rec {
     pname = "dbf";
diff --git a/pkgs/development/python-modules/dbfread/default.nix b/pkgs/development/python-modules/dbfread/default.nix
index 9f78f3fdde1b..1708a75fc10e 100644
--- a/pkgs/development/python-modules/dbfread/default.nix
+++ b/pkgs/development/python-modules/dbfread/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage }:
+{ lib, fetchPypi, buildPythonPackage }:
 
 buildPythonPackage rec {
     pname = "dbfread";
diff --git a/pkgs/development/python-modules/dbus-next/default.nix b/pkgs/development/python-modules/dbus-next/default.nix
index 76385ac8023a..d7cf79f9d07c 100644
--- a/pkgs/development/python-modules/dbus-next/default.nix
+++ b/pkgs/development/python-modules/dbus-next/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , python
diff --git a/pkgs/development/python-modules/dbutils/default.nix b/pkgs/development/python-modules/dbutils/default.nix
index 42ae779e0d21..848e5038af8d 100644
--- a/pkgs/development/python-modules/dbutils/default.nix
+++ b/pkgs/development/python-modules/dbutils/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytestCheckHook }:
+{ lib, buildPythonPackage, fetchPypi, pytestCheckHook }:
 
 buildPythonPackage rec {
   version = "2.0";
diff --git a/pkgs/development/python-modules/dcmstack/default.nix b/pkgs/development/python-modules/dcmstack/default.nix
index a6669d0e30df..ee554a6e2bd7 100644
--- a/pkgs/development/python-modules/dcmstack/default.nix
+++ b/pkgs/development/python-modules/dcmstack/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , pythonAtLeast
diff --git a/pkgs/development/python-modules/deap/default.nix b/pkgs/development/python-modules/deap/default.nix
index 21dc9d3832c8..f260727b87a6 100644
--- a/pkgs/development/python-modules/deap/default.nix
+++ b/pkgs/development/python-modules/deap/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, python, numpy, matplotlib, nose }:
+{ lib, buildPythonPackage, fetchPypi, python, numpy, matplotlib, nose }:
 
 buildPythonPackage rec {
   pname = "deap";
diff --git a/pkgs/development/python-modules/deluge-client/default.nix b/pkgs/development/python-modules/deluge-client/default.nix
index a271371e22fc..4426fe65bf5e 100644
--- a/pkgs/development/python-modules/deluge-client/default.nix
+++ b/pkgs/development/python-modules/deluge-client/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "deluge-client";
diff --git a/pkgs/development/python-modules/demjson/default.nix b/pkgs/development/python-modules/demjson/default.nix
index fc70562938ef..25e2692af3ba 100644
--- a/pkgs/development/python-modules/demjson/default.nix
+++ b/pkgs/development/python-modules/demjson/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python, buildPythonPackage, fetchPypi, isPy3k }:
+{ lib, python, buildPythonPackage, fetchPypi, isPy3k }:
 
 buildPythonPackage rec {
   pname = "demjson";
diff --git a/pkgs/development/python-modules/dependency-injector/default.nix b/pkgs/development/python-modules/dependency-injector/default.nix
index 0c2e2055ff9f..979d2811fe6a 100644
--- a/pkgs/development/python-modules/dependency-injector/default.nix
+++ b/pkgs/development/python-modules/dependency-injector/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k, six, unittest2, pyyaml, flask }:
+{ lib, buildPythonPackage, fetchPypi, isPy3k, six, unittest2, pyyaml, flask }:
 
 let
   testPath =
diff --git a/pkgs/development/python-modules/deprecated/default.nix b/pkgs/development/python-modules/deprecated/default.nix
index a64ed0b9d992..589335f8258d 100644
--- a/pkgs/development/python-modules/deprecated/default.nix
+++ b/pkgs/development/python-modules/deprecated/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage,
+{ lib, fetchPypi, buildPythonPackage,
   wrapt, pytest, tox }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/derpconf/default.nix b/pkgs/development/python-modules/derpconf/default.nix
index f9b8f5dec7c0..cc7b6870ad82 100644
--- a/pkgs/development/python-modules/derpconf/default.nix
+++ b/pkgs/development/python-modules/derpconf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, six }:
+{ lib, buildPythonPackage, fetchPypi, six }:
 
 buildPythonPackage rec {
   pname = "derpconf";
diff --git a/pkgs/development/python-modules/descartes/default.nix b/pkgs/development/python-modules/descartes/default.nix
index 5280ff2417aa..b10526ff0fd5 100644
--- a/pkgs/development/python-modules/descartes/default.nix
+++ b/pkgs/development/python-modules/descartes/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi,
+{ lib, buildPythonPackage, fetchPypi,
   matplotlib, shapely
 }:
 
diff --git a/pkgs/development/python-modules/deskcon/default.nix b/pkgs/development/python-modules/deskcon/default.nix
index 01918445b342..43d5a955027c 100644
--- a/pkgs/development/python-modules/deskcon/default.nix
+++ b/pkgs/development/python-modules/deskcon/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , pyopenssl
 , pkgs
diff --git a/pkgs/development/python-modules/diff_cover/default.nix b/pkgs/development/python-modules/diff_cover/default.nix
index 9672cca46b05..03b1f4fa28ee 100644
--- a/pkgs/development/python-modules/diff_cover/default.nix
+++ b/pkgs/development/python-modules/diff_cover/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , inflect
 , jinja2
 , jinja2_pluralize
diff --git a/pkgs/development/python-modules/digi-xbee/default.nix b/pkgs/development/python-modules/digi-xbee/default.nix
index ad653c6313c6..d5f1445a6771 100644
--- a/pkgs/development/python-modules/digi-xbee/default.nix
+++ b/pkgs/development/python-modules/digi-xbee/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, fetchPypi, isPy27, pyserial, srp, lib }:
+{ buildPythonPackage, fetchPypi, isPy27, pyserial, srp, lib }:
 
 buildPythonPackage rec {
   pname = "digi-xbee";
diff --git a/pkgs/development/python-modules/discogs_client/default.nix b/pkgs/development/python-modules/discogs_client/default.nix
index 5e3ac1e1fcde..e522ac4b6c9d 100644
--- a/pkgs/development/python-modules/discogs_client/default.nix
+++ b/pkgs/development/python-modules/discogs_client/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, requests, oauthlib }:
+{ lib, buildPythonPackage, fetchPypi, requests, oauthlib }:
 
 buildPythonPackage rec {
   pname = "discogs-client";
diff --git a/pkgs/development/python-modules/distlib/default.nix b/pkgs/development/python-modules/distlib/default.nix
index 403834a3731c..12e05b58c4c4 100644
--- a/pkgs/development/python-modules/distlib/default.nix
+++ b/pkgs/development/python-modules/distlib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "distlib";
diff --git a/pkgs/development/python-modules/distorm3/default.nix b/pkgs/development/python-modules/distorm3/default.nix
index e9b8e66d4c99..d798414c1974 100644
--- a/pkgs/development/python-modules/distorm3/default.nix
+++ b/pkgs/development/python-modules/distorm3/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "distorm3";
diff --git a/pkgs/development/python-modules/distro/default.nix b/pkgs/development/python-modules/distro/default.nix
index 81bcccd8bd6c..16d26e741aa9 100644
--- a/pkgs/development/python-modules/distro/default.nix
+++ b/pkgs/development/python-modules/distro/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage }:
+{ lib, fetchPypi, buildPythonPackage }:
 
 buildPythonPackage rec {
   pname = "distro";
diff --git a/pkgs/development/python-modules/distutils_extra/default.nix b/pkgs/development/python-modules/distutils_extra/default.nix
index 882a39957993..c2fbcdfe46c9 100644
--- a/pkgs/development/python-modules/distutils_extra/default.nix
+++ b/pkgs/development/python-modules/distutils_extra/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 }:
diff --git a/pkgs/development/python-modules/dj-email-url/default.nix b/pkgs/development/python-modules/dj-email-url/default.nix
index f8dd9dca202c..0cabbef1d15d 100644
--- a/pkgs/development/python-modules/dj-email-url/default.nix
+++ b/pkgs/development/python-modules/dj-email-url/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , python
diff --git a/pkgs/development/python-modules/dj-search-url/default.nix b/pkgs/development/python-modules/dj-search-url/default.nix
index 321bec8149d1..b216c8e62a1e 100644
--- a/pkgs/development/python-modules/dj-search-url/default.nix
+++ b/pkgs/development/python-modules/dj-search-url/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/django-allauth/default.nix b/pkgs/development/python-modules/django-allauth/default.nix
index fafd7ab9a63f..143e76cf0d87 100644
--- a/pkgs/development/python-modules/django-allauth/default.nix
+++ b/pkgs/development/python-modules/django-allauth/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, requests, requests_oauthlib
+{ lib, buildPythonPackage, fetchFromGitHub, requests, requests_oauthlib
 , django, python3-openid, mock, coverage }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/django-anymail/default.nix b/pkgs/development/python-modules/django-anymail/default.nix
index 892cf179c370..96d5aa7fd9d9 100644
--- a/pkgs/development/python-modules/django-anymail/default.nix
+++ b/pkgs/development/python-modules/django-anymail/default.nix
@@ -1,5 +1,5 @@
 {
-    lib, stdenv,
+    lib,
     buildPythonPackage,
     fetchFromGitHub,
     six,
diff --git a/pkgs/development/python-modules/django-auth-ldap/default.nix b/pkgs/development/python-modules/django-auth-ldap/default.nix
index d0dacd659a15..2271be1d16f4 100644
--- a/pkgs/development/python-modules/django-auth-ldap/default.nix
+++ b/pkgs/development/python-modules/django-auth-ldap/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi, isPy27
 , ldap , django
diff --git a/pkgs/development/python-modules/django-cache-url/default.nix b/pkgs/development/python-modules/django-cache-url/default.nix
index 103bfb29578d..6487e276232b 100644
--- a/pkgs/development/python-modules/django-cache-url/default.nix
+++ b/pkgs/development/python-modules/django-cache-url/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/django-cleanup/default.nix b/pkgs/development/python-modules/django-cleanup/default.nix
index 39f65275feed..83dbbc5d1974 100644
--- a/pkgs/development/python-modules/django-cleanup/default.nix
+++ b/pkgs/development/python-modules/django-cleanup/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, django
+{ lib, buildPythonPackage, fetchPypi, django
 , redis, async-timeout, hiredis
 }:
 
diff --git a/pkgs/development/python-modules/django-compat/default.nix b/pkgs/development/python-modules/django-compat/default.nix
index ef18bfe77ec9..d33a4be2817f 100644
--- a/pkgs/development/python-modules/django-compat/default.nix
+++ b/pkgs/development/python-modules/django-compat/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, python,
+{ lib, buildPythonPackage, fetchFromGitHub, python,
   django, six
 }:
 
diff --git a/pkgs/development/python-modules/django-configurations/default.nix b/pkgs/development/python-modules/django-configurations/default.nix
index bf1835071f88..b6b736e92383 100644
--- a/pkgs/development/python-modules/django-configurations/default.nix
+++ b/pkgs/development/python-modules/django-configurations/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , django-discover-runner
diff --git a/pkgs/development/python-modules/django-csp/default.nix b/pkgs/development/python-modules/django-csp/default.nix
index d87e39b8e3f7..1f7b28114054 100644
--- a/pkgs/development/python-modules/django-csp/default.nix
+++ b/pkgs/development/python-modules/django-csp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, django }:
+{ lib, fetchPypi, buildPythonPackage, django }:
 
 buildPythonPackage rec {
   pname = "django-csp";
diff --git a/pkgs/development/python-modules/django-discover-runner/default.nix b/pkgs/development/python-modules/django-discover-runner/default.nix
index 63d51d41fc93..8d07148ce182 100644
--- a/pkgs/development/python-modules/django-discover-runner/default.nix
+++ b/pkgs/development/python-modules/django-discover-runner/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , django
diff --git a/pkgs/development/python-modules/django-dynamic-preferences/default.nix b/pkgs/development/python-modules/django-dynamic-preferences/default.nix
index 7288896c4fea..7e5105807cfb 100644
--- a/pkgs/development/python-modules/django-dynamic-preferences/default.nix
+++ b/pkgs/development/python-modules/django-dynamic-preferences/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , django, persisting-theory, six
 }:
 
diff --git a/pkgs/development/python-modules/django-filter/default.nix b/pkgs/development/python-modules/django-filter/default.nix
index e4ca546bbc28..00c260946cce 100644
--- a/pkgs/development/python-modules/django-filter/default.nix
+++ b/pkgs/development/python-modules/django-filter/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , django
diff --git a/pkgs/development/python-modules/django-gravatar2/default.nix b/pkgs/development/python-modules/django-gravatar2/default.nix
index 083126066039..458723601dd7 100644
--- a/pkgs/development/python-modules/django-gravatar2/default.nix
+++ b/pkgs/development/python-modules/django-gravatar2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "django-gravatar2";
diff --git a/pkgs/development/python-modules/django-hijack-admin/default.nix b/pkgs/development/python-modules/django-hijack-admin/default.nix
index 54056547f48a..ee5a47d3787c 100644
--- a/pkgs/development/python-modules/django-hijack-admin/default.nix
+++ b/pkgs/development/python-modules/django-hijack-admin/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, python,
+{ lib, buildPythonPackage, fetchFromGitHub, python,
   django_hijack, django_nose }:
 buildPythonPackage rec {
   pname = "django-hijack-admin";
diff --git a/pkgs/development/python-modules/django-hijack/default.nix b/pkgs/development/python-modules/django-hijack/default.nix
index bd6f870de66e..fd9c30a4bc7c 100644
--- a/pkgs/development/python-modules/django-hijack/default.nix
+++ b/pkgs/development/python-modules/django-hijack/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, python,
+{ lib, buildPythonPackage, fetchFromGitHub, python,
   django, django_compat, django_nose
 }:
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/django-logentry-admin/default.nix b/pkgs/development/python-modules/django-logentry-admin/default.nix
index 59e9782f0501..7bba272c155d 100644
--- a/pkgs/development/python-modules/django-logentry-admin/default.nix
+++ b/pkgs/development/python-modules/django-logentry-admin/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonPackage, django, pytest, pytest-django }:
+{ lib, fetchFromGitHub, buildPythonPackage, django, pytest, pytest-django }:
 
 buildPythonPackage rec {
   pname = "django-logentry-admin";
diff --git a/pkgs/development/python-modules/django-mailman3/default.nix b/pkgs/development/python-modules/django-mailman3/default.nix
index 40063c89e432..11939b9b7739 100644
--- a/pkgs/development/python-modules/django-mailman3/default.nix
+++ b/pkgs/development/python-modules/django-mailman3/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, django-gravatar2, django_compressor
+{ lib, buildPythonPackage, fetchPypi, django-gravatar2, django_compressor
 , django-allauth, mailmanclient, django, mock
 }:
 
diff --git a/pkgs/development/python-modules/django-maintenance-mode/default.nix b/pkgs/development/python-modules/django-maintenance-mode/default.nix
index c599e28d2062..b4d90da08808 100644
--- a/pkgs/development/python-modules/django-maintenance-mode/default.nix
+++ b/pkgs/development/python-modules/django-maintenance-mode/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonPackage, pytest, django }:
+{ lib, fetchFromGitHub, buildPythonPackage, pytest, django }:
 
 buildPythonPackage rec {
   pname = "django-maintenance-mode";
diff --git a/pkgs/development/python-modules/django-oauth-toolkit/default.nix b/pkgs/development/python-modules/django-oauth-toolkit/default.nix
index 6e16af5bc8f9..e7cb4814cb48 100644
--- a/pkgs/development/python-modules/django-oauth-toolkit/default.nix
+++ b/pkgs/development/python-modules/django-oauth-toolkit/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub
+{ lib, buildPythonPackage, fetchFromGitHub
 , django, requests, oauthlib
 }:
 
diff --git a/pkgs/development/python-modules/django-paintstore/default.nix b/pkgs/development/python-modules/django-paintstore/default.nix
index 4fed9bf470b2..8790067e4af0 100644
--- a/pkgs/development/python-modules/django-paintstore/default.nix
+++ b/pkgs/development/python-modules/django-paintstore/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, requests, requests_oauthlib
+{ lib, buildPythonPackage, fetchPypi, requests, requests_oauthlib
 , django, python3-openid }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/django-polymorphic/default.nix b/pkgs/development/python-modules/django-polymorphic/default.nix
index b3b71231b75b..4b8d79a2917e 100644
--- a/pkgs/development/python-modules/django-polymorphic/default.nix
+++ b/pkgs/development/python-modules/django-polymorphic/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, python, django, dj-database-url }:
+{ lib, buildPythonPackage, fetchFromGitHub, python, django, dj-database-url }:
 
 buildPythonPackage rec {
   pname = "django-polymorphic";
diff --git a/pkgs/development/python-modules/django-postgresql-netfields/default.nix b/pkgs/development/python-modules/django-postgresql-netfields/default.nix
index f2bd574919aa..141a46f53154 100644
--- a/pkgs/development/python-modules/django-postgresql-netfields/default.nix
+++ b/pkgs/development/python-modules/django-postgresql-netfields/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , django
 , netaddr
diff --git a/pkgs/development/python-modules/django-q/default.nix b/pkgs/development/python-modules/django-q/default.nix
index 2eb3b19f554b..16b1e0bcc59f 100644
--- a/pkgs/development/python-modules/django-q/default.nix
+++ b/pkgs/development/python-modules/django-q/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, django-picklefield, arrow
+{ lib, buildPythonPackage, fetchPypi, django-picklefield, arrow
 , blessed, django, future }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/django-ranged-response/default.nix b/pkgs/development/python-modules/django-ranged-response/default.nix
index d517563590fb..df5fc4b205b1 100644
--- a/pkgs/development/python-modules/django-ranged-response/default.nix
+++ b/pkgs/development/python-modules/django-ranged-response/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, fetchPypi, buildPythonPackage, django }:
+{ lib, fetchurl, fetchPypi, buildPythonPackage, django }:
 
 buildPythonPackage rec {
   pname = "django-ranged-response";
diff --git a/pkgs/development/python-modules/django-raster/default.nix b/pkgs/development/python-modules/django-raster/default.nix
index 173452ebe484..609388a311c8 100644
--- a/pkgs/development/python-modules/django-raster/default.nix
+++ b/pkgs/development/python-modules/django-raster/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k,
+{ lib, buildPythonPackage, fetchPypi, isPy3k,
   numpy, django_colorful, pillow, psycopg2,
   pyparsing, django, celery, boto3, importlib-metadata
 }:
diff --git a/pkgs/development/python-modules/django-storages/default.nix b/pkgs/development/python-modules/django-storages/default.nix
index 869c3bf74eef..6efba78d4ca5 100644
--- a/pkgs/development/python-modules/django-storages/default.nix
+++ b/pkgs/development/python-modules/django-storages/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , django
 }:
 
diff --git a/pkgs/development/python-modules/django-versatileimagefield/default.nix b/pkgs/development/python-modules/django-versatileimagefield/default.nix
index 39912f474204..4307fc69d457 100644
--- a/pkgs/development/python-modules/django-versatileimagefield/default.nix
+++ b/pkgs/development/python-modules/django-versatileimagefield/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , django
diff --git a/pkgs/development/python-modules/django-webpack-loader/default.nix b/pkgs/development/python-modules/django-webpack-loader/default.nix
index e3e094ab706a..3e849b487739 100644
--- a/pkgs/development/python-modules/django-webpack-loader/default.nix
+++ b/pkgs/development/python-modules/django-webpack-loader/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "django-webpack-loader";
diff --git a/pkgs/development/python-modules/django-widget-tweaks/default.nix b/pkgs/development/python-modules/django-widget-tweaks/default.nix
index 8529df09bb76..853e12327d32 100644
--- a/pkgs/development/python-modules/django-widget-tweaks/default.nix
+++ b/pkgs/development/python-modules/django-widget-tweaks/default.nix
@@ -1,4 +1,4 @@
-{ buildPythonPackage, fetchFromGitHub, python, lib, stdenv, django }:
+{ buildPythonPackage, fetchFromGitHub, python, lib, django }:
 
 buildPythonPackage rec {
   pname = "django-widget-tweaks";
diff --git a/pkgs/development/python-modules/django_appconf/default.nix b/pkgs/development/python-modules/django_appconf/default.nix
index c9c9913d7644..5da9ed0ca26d 100644
--- a/pkgs/development/python-modules/django_appconf/default.nix
+++ b/pkgs/development/python-modules/django_appconf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, six, django, fetchpatch }:
+{ lib, buildPythonPackage, fetchFromGitHub, six, django, fetchpatch }:
 buildPythonPackage rec {
   pname = "django-appconf";
   version = "1.0.3";
diff --git a/pkgs/development/python-modules/django_classytags/default.nix b/pkgs/development/python-modules/django_classytags/default.nix
index e0a297e53c0c..2ef8639c17e6 100644
--- a/pkgs/development/python-modules/django_classytags/default.nix
+++ b/pkgs/development/python-modules/django_classytags/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , django
diff --git a/pkgs/development/python-modules/django_colorful/default.nix b/pkgs/development/python-modules/django_colorful/default.nix
index 468327139e64..5de127a97221 100644
--- a/pkgs/development/python-modules/django_colorful/default.nix
+++ b/pkgs/development/python-modules/django_colorful/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , django
diff --git a/pkgs/development/python-modules/django_compressor/default.nix b/pkgs/development/python-modules/django_compressor/default.nix
index f00804364899..edf5faa5af40 100644
--- a/pkgs/development/python-modules/django_compressor/default.nix
+++ b/pkgs/development/python-modules/django_compressor/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi,
+{ lib, buildPythonPackage, fetchPypi,
   rcssmin, rjsmin, django_appconf }:
 buildPythonPackage rec {
     pname = "django_compressor";
diff --git a/pkgs/development/python-modules/django_contrib_comments/default.nix b/pkgs/development/python-modules/django_contrib_comments/default.nix
index a8872967df4d..a452db3cf281 100644
--- a/pkgs/development/python-modules/django_contrib_comments/default.nix
+++ b/pkgs/development/python-modules/django_contrib_comments/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , django
diff --git a/pkgs/development/python-modules/django_environ/default.nix b/pkgs/development/python-modules/django_environ/default.nix
index fa2618fa1a71..3f01a2b294a1 100644
--- a/pkgs/development/python-modules/django_environ/default.nix
+++ b/pkgs/development/python-modules/django_environ/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , django
diff --git a/pkgs/development/python-modules/django_evolution/default.nix b/pkgs/development/python-modules/django_evolution/default.nix
index dba92efb2d94..816442d6e2a8 100644
--- a/pkgs/development/python-modules/django_evolution/default.nix
+++ b/pkgs/development/python-modules/django_evolution/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/django_guardian/default.nix b/pkgs/development/python-modules/django_guardian/default.nix
index 60023660ea56..957944f01d38 100644
--- a/pkgs/development/python-modules/django_guardian/default.nix
+++ b/pkgs/development/python-modules/django_guardian/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , django_environ, mock, django
 , pytest, pytestrunner, pytest-django
 }:
diff --git a/pkgs/development/python-modules/django_modelcluster/default.nix b/pkgs/development/python-modules/django_modelcluster/default.nix
index 500fe2e2fbce..fdd4bd03b705 100644
--- a/pkgs/development/python-modules/django_modelcluster/default.nix
+++ b/pkgs/development/python-modules/django_modelcluster/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytz
diff --git a/pkgs/development/python-modules/django_nose/default.nix b/pkgs/development/python-modules/django_nose/default.nix
index 7f2f9efcfc5b..2506f6aba44a 100644
--- a/pkgs/development/python-modules/django_nose/default.nix
+++ b/pkgs/development/python-modules/django_nose/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/django_redis/default.nix b/pkgs/development/python-modules/django_redis/default.nix
index 434dea7f0f21..56e4e845f08c 100644
--- a/pkgs/development/python-modules/django_redis/default.nix
+++ b/pkgs/development/python-modules/django_redis/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage,
+{ lib, fetchPypi, buildPythonPackage,
   mock, django, redis, msgpack }:
 buildPythonPackage rec {
   pname = "django-redis";
diff --git a/pkgs/development/python-modules/django_reversion/default.nix b/pkgs/development/python-modules/django_reversion/default.nix
index 16574770ff9e..3f038b4fd06c 100644
--- a/pkgs/development/python-modules/django_reversion/default.nix
+++ b/pkgs/development/python-modules/django_reversion/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , django
diff --git a/pkgs/development/python-modules/django_silk/default.nix b/pkgs/development/python-modules/django_silk/default.nix
index 66475b35d2a3..90ba6cf2924e 100644
--- a/pkgs/development/python-modules/django_silk/default.nix
+++ b/pkgs/development/python-modules/django_silk/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , python
 , fetchFromGitHub
diff --git a/pkgs/development/python-modules/django_taggit/default.nix b/pkgs/development/python-modules/django_taggit/default.nix
index e715dde7c41e..b51f0421fd95 100644
--- a/pkgs/development/python-modules/django_taggit/default.nix
+++ b/pkgs/development/python-modules/django_taggit/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , python
 , fetchPypi
diff --git a/pkgs/development/python-modules/django_treebeard/default.nix b/pkgs/development/python-modules/django_treebeard/default.nix
index e734a5f7ae8e..88536b210d2a 100644
--- a/pkgs/development/python-modules/django_treebeard/default.nix
+++ b/pkgs/development/python-modules/django_treebeard/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/djangorestframework/default.nix b/pkgs/development/python-modules/djangorestframework/default.nix
index ce92fab3e965..66a57625b4a9 100644
--- a/pkgs/development/python-modules/djangorestframework/default.nix
+++ b/pkgs/development/python-modules/djangorestframework/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, django, isPy27 }:
+{ lib, buildPythonPackage, fetchFromGitHub, django, isPy27 }:
 
 buildPythonPackage rec {
   version = "3.12.2";
diff --git a/pkgs/development/python-modules/dkimpy/default.nix b/pkgs/development/python-modules/dkimpy/default.nix
index e7a80d91d24c..aaaf5708a593 100644
--- a/pkgs/development/python-modules/dkimpy/default.nix
+++ b/pkgs/development/python-modules/dkimpy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, openssl, buildPythonPackage
+{ lib, fetchPypi, openssl, buildPythonPackage
 , pytest, dnspython, pynacl, authres, python }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/docker-pycreds/default.nix b/pkgs/development/python-modules/docker-pycreds/default.nix
index 543f4994020c..c022d62bfa84 100644
--- a/pkgs/development/python-modules/docker-pycreds/default.nix
+++ b/pkgs/development/python-modules/docker-pycreds/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, six }:
+{ lib, buildPythonPackage, fetchPypi, six }:
 
 buildPythonPackage rec {
   pname = "docker-pycreds";
diff --git a/pkgs/development/python-modules/dockerfile-parse/default.nix b/pkgs/development/python-modules/dockerfile-parse/default.nix
index 74e363d18b97..45fe856f6f0d 100644
--- a/pkgs/development/python-modules/dockerfile-parse/default.nix
+++ b/pkgs/development/python-modules/dockerfile-parse/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, six, pytestcov, pytest }:
+{ lib, buildPythonPackage, fetchPypi, six, pytestcov, pytest }:
 
 buildPythonPackage rec {
   version = "1.1.0";
diff --git a/pkgs/development/python-modules/dockerpty/default.nix b/pkgs/development/python-modules/dockerpty/default.nix
index b6267b87c1bd..775767e6fecf 100644
--- a/pkgs/development/python-modules/dockerpty/default.nix
+++ b/pkgs/development/python-modules/dockerpty/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, six }:
+{ lib, buildPythonPackage, fetchPypi, six }:
 
 buildPythonPackage rec {
   pname = "dockerpty";
diff --git a/pkgs/development/python-modules/docopt/default.nix b/pkgs/development/python-modules/docopt/default.nix
index 2dc4bb38cf14..68df40a3cbf2 100644
--- a/pkgs/development/python-modules/docopt/default.nix
+++ b/pkgs/development/python-modules/docopt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "docopt";
diff --git a/pkgs/development/python-modules/doctest-ignore-unicode/default.nix b/pkgs/development/python-modules/doctest-ignore-unicode/default.nix
index 12d15799ecc6..533dbed29b34 100644
--- a/pkgs/development/python-modules/doctest-ignore-unicode/default.nix
+++ b/pkgs/development/python-modules/doctest-ignore-unicode/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, nose }:
+{ lib, buildPythonPackage, fetchPypi, nose }:
 
 buildPythonPackage rec {
   pname = "doctest-ignore-unicode";
diff --git a/pkgs/development/python-modules/dogpile.cache/default.nix b/pkgs/development/python-modules/dogpile.cache/default.nix
index 5dba1b91bc17..92fae14f4ead 100644
--- a/pkgs/development/python-modules/dogpile.cache/default.nix
+++ b/pkgs/development/python-modules/dogpile.cache/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
diff --git a/pkgs/development/python-modules/dogpile.core/default.nix b/pkgs/development/python-modules/dogpile.core/default.nix
index f6eabc378b3b..8ef37282250d 100644
--- a/pkgs/development/python-modules/dogpile.core/default.nix
+++ b/pkgs/development/python-modules/dogpile.core/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "dogpile.core";
diff --git a/pkgs/development/python-modules/dot2tex/default.nix b/pkgs/development/python-modules/dot2tex/default.nix
index 2626f420676a..2154f33bb8ba 100644
--- a/pkgs/development/python-modules/dot2tex/default.nix
+++ b/pkgs/development/python-modules/dot2tex/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , python
 , buildPythonPackage
 , fetchPypi
diff --git a/pkgs/development/python-modules/dpath/default.nix b/pkgs/development/python-modules/dpath/default.nix
index 505bd7bb456c..9db726a12a19 100644
--- a/pkgs/development/python-modules/dpath/default.nix
+++ b/pkgs/development/python-modules/dpath/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, isPy27
+{ lib, fetchPypi, buildPythonPackage, isPy27
 , mock, pytestCheckHook, nose, hypothesis
 }:
 
diff --git a/pkgs/development/python-modules/dpkt/default.nix b/pkgs/development/python-modules/dpkt/default.nix
index 177b260e8044..52f4f42661d9 100644
--- a/pkgs/development/python-modules/dpkt/default.nix
+++ b/pkgs/development/python-modules/dpkt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage }:
+{ lib, fetchPypi, buildPythonPackage }:
 
 buildPythonPackage rec {
   pname = "dpkt";
diff --git a/pkgs/development/python-modules/drf-yasg/default.nix b/pkgs/development/python-modules/drf-yasg/default.nix
index dd92d51d6c6b..d69ece809bb9 100644
--- a/pkgs/development/python-modules/drf-yasg/default.nix
+++ b/pkgs/development/python-modules/drf-yasg/default.nix
@@ -1,5 +1,5 @@
 {
-  lib, stdenv,
+  lib,
   buildPythonPackage,
   fetchPypi,
   inflection,
diff --git a/pkgs/development/python-modules/dropbox/default.nix b/pkgs/development/python-modules/dropbox/default.nix
index 22e66d0a4a43..ca0283b2cbdc 100644
--- a/pkgs/development/python-modules/dropbox/default.nix
+++ b/pkgs/development/python-modules/dropbox/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , pytestrunner, requests, urllib3, mock, setuptools }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/dtopt/default.nix b/pkgs/development/python-modules/dtopt/default.nix
index 84631c217089..a5d4675f9930 100644
--- a/pkgs/development/python-modules/dtopt/default.nix
+++ b/pkgs/development/python-modules/dtopt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/dufte/default.nix b/pkgs/development/python-modules/dufte/default.nix
index d8435afa3f97..f5e9fa6195a5 100644
--- a/pkgs/development/python-modules/dufte/default.nix
+++ b/pkgs/development/python-modules/dufte/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/dyn/default.nix b/pkgs/development/python-modules/dyn/default.nix
index b5fa28f2de6b..7cddb324f3a1 100644
--- a/pkgs/development/python-modules/dyn/default.nix
+++ b/pkgs/development/python-modules/dyn/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest, pytestcov, mock
+{ lib, buildPythonPackage, fetchPypi, pytest, pytestcov, mock
 , pytest_xdist, covCore, glibcLocales }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/dynd/default.nix b/pkgs/development/python-modules/dynd/default.nix
index f23d19510ee7..9323255cc27c 100644
--- a/pkgs/development/python-modules/dynd/default.nix
+++ b/pkgs/development/python-modules/dynd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , isPyPy
 , isPy3k
diff --git a/pkgs/development/python-modules/easygui/default.nix b/pkgs/development/python-modules/easygui/default.nix
index 441d839d36f6..322e6461e5d4 100644
--- a/pkgs/development/python-modules/easygui/default.nix
+++ b/pkgs/development/python-modules/easygui/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage }:
+{ lib, fetchPypi, buildPythonPackage }:
 
 buildPythonPackage rec {
   pname = "easygui";
diff --git a/pkgs/development/python-modules/easyprocess/default.nix b/pkgs/development/python-modules/easyprocess/default.nix
index fc86edf5d4d0..c98a8b572d45 100644
--- a/pkgs/development/python-modules/easyprocess/default.nix
+++ b/pkgs/development/python-modules/easyprocess/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "EasyProcess";
diff --git a/pkgs/development/python-modules/easysnmp/default.nix b/pkgs/development/python-modules/easysnmp/default.nix
index d5c69d4c7e9d..11b13d8325a0 100644
--- a/pkgs/development/python-modules/easysnmp/default.nix
+++ b/pkgs/development/python-modules/easysnmp/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , buildPythonPackage
 , pythonAtLeast
 , fetchFromGitHub
diff --git a/pkgs/development/python-modules/ecdsa/default.nix b/pkgs/development/python-modules/ecdsa/default.nix
index 2a17f84bb3b4..3c8921856876 100644
--- a/pkgs/development/python-modules/ecdsa/default.nix
+++ b/pkgs/development/python-modules/ecdsa/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pkgs
diff --git a/pkgs/development/python-modules/ed25519/default.nix b/pkgs/development/python-modules/ed25519/default.nix
index 183d7cc3ca55..47692075d3bc 100644
--- a/pkgs/development/python-modules/ed25519/default.nix
+++ b/pkgs/development/python-modules/ed25519/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage }:
+{ lib, fetchPypi, buildPythonPackage }:
 
 buildPythonPackage rec {
   pname = "ed25519";
diff --git a/pkgs/development/python-modules/editorconfig/default.nix b/pkgs/development/python-modules/editorconfig/default.nix
index 727c3003db5c..4329db98c2bd 100644
--- a/pkgs/development/python-modules/editorconfig/default.nix
+++ b/pkgs/development/python-modules/editorconfig/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchgit
 , cmake
diff --git a/pkgs/development/python-modules/edward/default.nix b/pkgs/development/python-modules/edward/default.nix
index c1171043356a..ac2d5023cc97 100644
--- a/pkgs/development/python-modules/edward/default.nix
+++ b/pkgs/development/python-modules/edward/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy27, pythonAtLeast
+{ lib, buildPythonPackage, fetchPypi, isPy27, pythonAtLeast
 , Keras, numpy, scipy, six, tensorflow }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/eggdeps/default.nix b/pkgs/development/python-modules/eggdeps/default.nix
index ae339368ff5d..02c2c6444493 100644
--- a/pkgs/development/python-modules/eggdeps/default.nix
+++ b/pkgs/development/python-modules/eggdeps/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , zope_interface
diff --git a/pkgs/development/python-modules/elasticsearch-dsl/default.nix b/pkgs/development/python-modules/elasticsearch-dsl/default.nix
index 67e277b57ac4..a2f2ff038db0 100644
--- a/pkgs/development/python-modules/elasticsearch-dsl/default.nix
+++ b/pkgs/development/python-modules/elasticsearch-dsl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/elasticsearch/default.nix b/pkgs/development/python-modules/elasticsearch/default.nix
index 4929d1f51a48..9161525c2bc6 100644
--- a/pkgs/development/python-modules/elasticsearch/default.nix
+++ b/pkgs/development/python-modules/elasticsearch/default.nix
@@ -2,7 +2,7 @@
 , fetchPypi
 , urllib3, requests
 , nosexcover, mock
-, lib, stdenv
+, lib
 }:
 
 buildPythonPackage (rec {
diff --git a/pkgs/development/python-modules/eliot/default.nix b/pkgs/development/python-modules/eliot/default.nix
index 472834c5c725..152561b69cee 100644
--- a/pkgs/development/python-modules/eliot/default.nix
+++ b/pkgs/development/python-modules/eliot/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
diff --git a/pkgs/development/python-modules/emcee/default.nix b/pkgs/development/python-modules/emcee/default.nix
index 12974a9422d6..a4f2bece3497 100644
--- a/pkgs/development/python-modules/emcee/default.nix
+++ b/pkgs/development/python-modules/emcee/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , numpy }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/emv/default.nix b/pkgs/development/python-modules/emv/default.nix
index 26d40d8d2052..f68729a42b62 100644
--- a/pkgs/development/python-modules/emv/default.nix
+++ b/pkgs/development/python-modules/emv/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub
+{ lib, buildPythonPackage, fetchFromGitHub
 , click, enum-compat, pyscard, pycountry, terminaltables
 , pytestCheckHook, pythonOlder
 }:
diff --git a/pkgs/development/python-modules/enum/default.nix b/pkgs/development/python-modules/enum/default.nix
index ad266623c78b..db827601d5de 100644
--- a/pkgs/development/python-modules/enum/default.nix
+++ b/pkgs/development/python-modules/enum/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/enum34/default.nix b/pkgs/development/python-modules/enum34/default.nix
index 5e26853098fb..91f54dc99cbf 100644
--- a/pkgs/development/python-modules/enum34/default.nix
+++ b/pkgs/development/python-modules/enum34/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonAtLeast
diff --git a/pkgs/development/python-modules/epc/default.nix b/pkgs/development/python-modules/epc/default.nix
index d74595431639..3950afa578e9 100644
--- a/pkgs/development/python-modules/epc/default.nix
+++ b/pkgs/development/python-modules/epc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , sexpdata
diff --git a/pkgs/development/python-modules/ephem/default.nix b/pkgs/development/python-modules/ephem/default.nix
index 4d6e59409266..c0d77c297481 100644
--- a/pkgs/development/python-modules/ephem/default.nix
+++ b/pkgs/development/python-modules/ephem/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k
+{ lib, buildPythonPackage, fetchPypi, isPy3k
 , glibcLocales, pytest }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/et_xmlfile/default.nix b/pkgs/development/python-modules/et_xmlfile/default.nix
index 5ba9490d945a..e407ca35e89b 100644
--- a/pkgs/development/python-modules/et_xmlfile/default.nix
+++ b/pkgs/development/python-modules/et_xmlfile/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , lxml
diff --git a/pkgs/development/python-modules/etcd/default.nix b/pkgs/development/python-modules/etcd/default.nix
index 338992259a14..0c2fd0c2952d 100644
--- a/pkgs/development/python-modules/etcd/default.nix
+++ b/pkgs/development/python-modules/etcd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , simplejson
diff --git a/pkgs/development/python-modules/eve/default.nix b/pkgs/development/python-modules/eve/default.nix
index b931db188e3e..4d5c6173cd79 100644
--- a/pkgs/development/python-modules/eve/default.nix
+++ b/pkgs/development/python-modules/eve/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , flask
diff --git a/pkgs/development/python-modules/eventlib/default.nix b/pkgs/development/python-modules/eventlib/default.nix
index 1b2b44d65f70..4d4bff85842a 100644
--- a/pkgs/development/python-modules/eventlib/default.nix
+++ b/pkgs/development/python-modules/eventlib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , isPy3k
 , fetchdarcs
diff --git a/pkgs/development/python-modules/evernote/default.nix b/pkgs/development/python-modules/evernote/default.nix
index 70c7fad963af..8c6e4b6c7c27 100644
--- a/pkgs/development/python-modules/evernote/default.nix
+++ b/pkgs/development/python-modules/evernote/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/exchangelib/default.nix b/pkgs/development/python-modules/exchangelib/default.nix
index e380ca613cfd..706e4d8137fe 100644
--- a/pkgs/development/python-modules/exchangelib/default.nix
+++ b/pkgs/development/python-modules/exchangelib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonPackage,
+{ lib, fetchFromGitHub, buildPythonPackage,
   pythonOlder,
   lxml, tzlocal, python-dateutil, pygments, requests-kerberos,
   defusedxml, cached-property, isodate, requests_ntlm, dnspython,
diff --git a/pkgs/development/python-modules/execnet/default.nix b/pkgs/development/python-modules/execnet/default.nix
index 0a22ab4b0516..ec4bcca9f86a 100644
--- a/pkgs/development/python-modules/execnet/default.nix
+++ b/pkgs/development/python-modules/execnet/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , buildPythonPackage
 , isPyPy
 , fetchPypi
diff --git a/pkgs/development/python-modules/exifread/default.nix b/pkgs/development/python-modules/exifread/default.nix
index e86a681a8e39..e26f616f8db9 100644
--- a/pkgs/development/python-modules/exifread/default.nix
+++ b/pkgs/development/python-modules/exifread/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/eyed3/default.nix b/pkgs/development/python-modules/eyed3/default.nix
index 08faf5c2ba84..3dfd810f99cb 100644
--- a/pkgs/development/python-modules/eyed3/default.nix
+++ b/pkgs/development/python-modules/eyed3/default.nix
@@ -1,11 +1,10 @@
-{ stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
 , python
 , isPyPy
 , six
-, lib
 , filetype
 , deprecation
 , dataclasses
diff --git a/pkgs/development/python-modules/ezdxf/default.nix b/pkgs/development/python-modules/ezdxf/default.nix
index 6dfefe092040..3fd30062b0d9 100644
--- a/pkgs/development/python-modules/ezdxf/default.nix
+++ b/pkgs/development/python-modules/ezdxf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, pythonOlder, fetchFromGitHub, pyparsing, pytest }:
+{ lib, buildPythonPackage, pythonOlder, fetchFromGitHub, pyparsing, pytest }:
 
 buildPythonPackage rec {
   version = "0.12";
diff --git a/pkgs/development/python-modules/face/default.nix b/pkgs/development/python-modules/face/default.nix
index 89e7156fa524..db1810ca056d 100644
--- a/pkgs/development/python-modules/face/default.nix
+++ b/pkgs/development/python-modules/face/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, boltons, pytest }:
+{ lib, buildPythonPackage, fetchPypi, boltons, pytest }:
 
 buildPythonPackage rec {
   pname = "face";
diff --git a/pkgs/development/python-modules/face_recognition/default.nix b/pkgs/development/python-modules/face_recognition/default.nix
index 1896bdfac592..6b2c6411aa1f 100644
--- a/pkgs/development/python-modules/face_recognition/default.nix
+++ b/pkgs/development/python-modules/face_recognition/default.nix
@@ -1,5 +1,5 @@
 { buildPythonPackage, fetchFromGitHub, pillow, click, dlib, numpy
-, face_recognition_models, lib, stdenv, flake8, pytest, glibcLocales
+, face_recognition_models, lib, flake8, pytest, glibcLocales
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/face_recognition_models/default.nix b/pkgs/development/python-modules/face_recognition_models/default.nix
index d5838438b7d9..6ec2634029b3 100644
--- a/pkgs/development/python-modules/face_recognition_models/default.nix
+++ b/pkgs/development/python-modules/face_recognition_models/default.nix
@@ -1,4 +1,4 @@
-{ buildPythonPackage, lib, stdenv, fetchPypi, setuptools }:
+{ buildPythonPackage, lib, fetchPypi, setuptools }:
 
 buildPythonPackage rec {
   pname = "face_recognition_models";
diff --git a/pkgs/development/python-modules/fake-useragent/default.nix b/pkgs/development/python-modules/fake-useragent/default.nix
index be26ab98af62..9b207a81c3c7 100644
--- a/pkgs/development/python-modules/fake-useragent/default.nix
+++ b/pkgs/development/python-modules/fake-useragent/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, six, pytest }:
+{ lib, fetchPypi, buildPythonPackage, six, pytest }:
 
 buildPythonPackage rec {
   pname = "fake-useragent";
diff --git a/pkgs/development/python-modules/fake_factory/default.nix b/pkgs/development/python-modules/fake_factory/default.nix
index 82af8d04e077..2e561a163ab5 100644
--- a/pkgs/development/python-modules/fake_factory/default.nix
+++ b/pkgs/development/python-modules/fake_factory/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , python
diff --git a/pkgs/development/python-modules/falcon/default.nix b/pkgs/development/python-modules/falcon/default.nix
index 8d1aa02026c1..eb6cbfa242e1 100644
--- a/pkgs/development/python-modules/falcon/default.nix
+++ b/pkgs/development/python-modules/falcon/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , coverage
diff --git a/pkgs/development/python-modules/fasteners/default.nix b/pkgs/development/python-modules/fasteners/default.nix
index 57ad69c0be41..55b9d3b3023f 100644
--- a/pkgs/development/python-modules/fasteners/default.nix
+++ b/pkgs/development/python-modules/fasteners/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/fastentrypoints/default.nix b/pkgs/development/python-modules/fastentrypoints/default.nix
index eb86784ddc7b..7671feb359f8 100644
--- a/pkgs/development/python-modules/fastentrypoints/default.nix
+++ b/pkgs/development/python-modules/fastentrypoints/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "fastentrypoints";
diff --git a/pkgs/development/python-modules/fastimport/default.nix b/pkgs/development/python-modules/fastimport/default.nix
index 55aad9d71ea5..383a0e4fbd58 100644
--- a/pkgs/development/python-modules/fastimport/default.nix
+++ b/pkgs/development/python-modules/fastimport/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, python, fetchPypi}:
+{ lib, buildPythonPackage, python, fetchPypi}:
 
 buildPythonPackage rec {
   pname = "fastimport";
diff --git a/pkgs/development/python-modules/fastpair/default.nix b/pkgs/development/python-modules/fastpair/default.nix
index 82964070d03b..9a3f8c53b1d3 100644
--- a/pkgs/development/python-modules/fastpair/default.nix
+++ b/pkgs/development/python-modules/fastpair/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, pytestrunner, pytest, scipy }:
+{ lib, buildPythonPackage, fetchFromGitHub, pytestrunner, pytest, scipy }:
 
 buildPythonPackage {
   pname = "fastpair";
diff --git a/pkgs/development/python-modules/fastpbkdf2/default.nix b/pkgs/development/python-modules/fastpbkdf2/default.nix
index e033dc42d457..e154471d7a88 100644
--- a/pkgs/development/python-modules/fastpbkdf2/default.nix
+++ b/pkgs/development/python-modules/fastpbkdf2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonPackage
+{ lib, fetchFromGitHub, buildPythonPackage
 , openssl, pytest, cffi, six }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/fastprogress/default.nix b/pkgs/development/python-modules/fastprogress/default.nix
index 25cc2b8792f7..9b43c05989f6 100644
--- a/pkgs/development/python-modules/fastprogress/default.nix
+++ b/pkgs/development/python-modules/fastprogress/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , numpy
diff --git a/pkgs/development/python-modules/fastrlock/default.nix b/pkgs/development/python-modules/fastrlock/default.nix
index 7aedbbdd8f7c..0821778d024f 100644
--- a/pkgs/development/python-modules/fastrlock/default.nix
+++ b/pkgs/development/python-modules/fastrlock/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "fastrlock";
diff --git a/pkgs/development/python-modules/fasttext/default.nix b/pkgs/development/python-modules/fasttext/default.nix
index bf3bd987564a..f3bddec76bd3 100644
--- a/pkgs/development/python-modules/fasttext/default.nix
+++ b/pkgs/development/python-modules/fasttext/default.nix
@@ -1,4 +1,4 @@
-{lib, stdenv, buildPythonPackage, fetchFromGitHub, numpy, pkgs, pybind11 }:
+{lib, buildPythonPackage, fetchFromGitHub, numpy, pkgs, pybind11 }:
 
 buildPythonPackage rec {
   inherit (pkgs.fasttext) pname version src;
diff --git a/pkgs/development/python-modules/fdint/default.nix b/pkgs/development/python-modules/fdint/default.nix
index 4de0d18ca8b7..413416c99a25 100644
--- a/pkgs/development/python-modules/fdint/default.nix
+++ b/pkgs/development/python-modules/fdint/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , cython
diff --git a/pkgs/development/python-modules/feedgen/default.nix b/pkgs/development/python-modules/feedgen/default.nix
index 509ffaed9d71..59ca95a0338a 100644
--- a/pkgs/development/python-modules/feedgen/default.nix
+++ b/pkgs/development/python-modules/feedgen/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, dateutil, lxml }:
+{ lib, buildPythonPackage, fetchPypi, dateutil, lxml }:
 
 buildPythonPackage rec {
   pname = "feedgen";
diff --git a/pkgs/development/python-modules/feedgenerator/default.nix b/pkgs/development/python-modules/feedgenerator/default.nix
index 8508cc637f22..d5eb1306b398 100644
--- a/pkgs/development/python-modules/feedgenerator/default.nix
+++ b/pkgs/development/python-modules/feedgenerator/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, glibcLocales, fetchPypi, six, pytz }:
+{ lib, buildPythonPackage, glibcLocales, fetchPypi, six, pytz }:
 
 buildPythonPackage rec {
   pname = "feedgenerator";
diff --git a/pkgs/development/python-modules/feedparser/5.nix b/pkgs/development/python-modules/feedparser/5.nix
index a79048c55254..58cdad9884e9 100644
--- a/pkgs/development/python-modules/feedparser/5.nix
+++ b/pkgs/development/python-modules/feedparser/5.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/feedparser/default.nix b/pkgs/development/python-modules/feedparser/default.nix
index 7b48fe6f73e5..38e9761952d6 100644
--- a/pkgs/development/python-modules/feedparser/default.nix
+++ b/pkgs/development/python-modules/feedparser/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/filebrowser_safe/default.nix b/pkgs/development/python-modules/filebrowser_safe/default.nix
index df132211d4f9..0cc1eae5ac20 100644
--- a/pkgs/development/python-modules/filebrowser_safe/default.nix
+++ b/pkgs/development/python-modules/filebrowser_safe/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , django
diff --git a/pkgs/development/python-modules/filebytes/default.nix b/pkgs/development/python-modules/filebytes/default.nix
index bfac6a0e6b23..5b6d6284ced5 100644
--- a/pkgs/development/python-modules/filebytes/default.nix
+++ b/pkgs/development/python-modules/filebytes/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/filelock/default.nix b/pkgs/development/python-modules/filelock/default.nix
index 77ddec306fc2..97073bb6b03b 100644
--- a/pkgs/development/python-modules/filelock/default.nix
+++ b/pkgs/development/python-modules/filelock/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "filelock";
diff --git a/pkgs/development/python-modules/filterpy/default.nix b/pkgs/development/python-modules/filterpy/default.nix
index 53059ce43d05..9740117b9b92 100644
--- a/pkgs/development/python-modules/filterpy/default.nix
+++ b/pkgs/development/python-modules/filterpy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , numpy
diff --git a/pkgs/development/python-modules/fints/default.nix b/pkgs/development/python-modules/fints/default.nix
index 8e02dac58508..c4dfc04046b7 100644
--- a/pkgs/development/python-modules/fints/default.nix
+++ b/pkgs/development/python-modules/fints/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, isPy27
+{ lib, buildPythonPackage, fetchFromGitHub, isPy27
 , bleach
 , mt-940
 , pytest
diff --git a/pkgs/development/python-modules/fire/default.nix b/pkgs/development/python-modules/fire/default.nix
index 6a2cc594360d..54f22032c6a4 100644
--- a/pkgs/development/python-modules/fire/default.nix
+++ b/pkgs/development/python-modules/fire/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, fetchpatch, six, hypothesis, mock
+{ lib, buildPythonPackage, fetchFromGitHub, fetchpatch, six, hypothesis, mock
 , python-Levenshtein, pytest, termcolor, isPy27, enum34 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/first/default.nix b/pkgs/development/python-modules/first/default.nix
index a5bdf847eff2..491fcd398053 100644
--- a/pkgs/development/python-modules/first/default.nix
+++ b/pkgs/development/python-modules/first/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "first";
diff --git a/pkgs/development/python-modules/flake8/default.nix b/pkgs/development/python-modules/flake8/default.nix
index 9e53ed28ff34..6f1d8181a583 100644
--- a/pkgs/development/python-modules/flake8/default.nix
+++ b/pkgs/development/python-modules/flake8/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pythonOlder
+{ lib, buildPythonPackage, fetchPypi, pythonOlder
 , mock, pytest, pytestrunner
 , configparser, enum34, mccabe, pycodestyle, pyflakes, functools32, typing, importlib-metadata
 }:
diff --git a/pkgs/development/python-modules/flaky/default.nix b/pkgs/development/python-modules/flaky/default.nix
index 02b0641a34e2..fe068211dfbf 100644
--- a/pkgs/development/python-modules/flaky/default.nix
+++ b/pkgs/development/python-modules/flaky/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , mock
diff --git a/pkgs/development/python-modules/flask-babel/default.nix b/pkgs/development/python-modules/flask-babel/default.nix
index da6176e6781f..602564d16268 100644
--- a/pkgs/development/python-modules/flask-babel/default.nix
+++ b/pkgs/development/python-modules/flask-babel/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , python
 , fetchPypi
diff --git a/pkgs/development/python-modules/flask-common/default.nix b/pkgs/development/python-modules/flask-common/default.nix
index 7dbf507f2205..cba8e9e8efd4 100644
--- a/pkgs/development/python-modules/flask-common/default.nix
+++ b/pkgs/development/python-modules/flask-common/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage
+{ lib, fetchPypi, buildPythonPackage
 , crayons, flask, flask-caching, gunicorn, maya, meinheld, whitenoise }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/flask-compress/default.nix b/pkgs/development/python-modules/flask-compress/default.nix
index 9491ca8be779..1e133df2b2bb 100644
--- a/pkgs/development/python-modules/flask-compress/default.nix
+++ b/pkgs/development/python-modules/flask-compress/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, flask
+{ lib, fetchPypi, buildPythonPackage, flask
 , brotli
 }:
 
diff --git a/pkgs/development/python-modules/flask-cors/default.nix b/pkgs/development/python-modules/flask-cors/default.nix
index 731e8b106ab7..25c054b231bb 100644
--- a/pkgs/development/python-modules/flask-cors/default.nix
+++ b/pkgs/development/python-modules/flask-cors/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage
+{ lib, fetchPypi, buildPythonPackage
 , nose, flask, six, packaging }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/flask-elastic/default.nix b/pkgs/development/python-modules/flask-elastic/default.nix
index 6986cd75be69..3a9daa577d4d 100644
--- a/pkgs/development/python-modules/flask-elastic/default.nix
+++ b/pkgs/development/python-modules/flask-elastic/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , flask, elasticsearch }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/flask-jwt-extended/default.nix b/pkgs/development/python-modules/flask-jwt-extended/default.nix
index cf8a70b05330..580cd1f89f7b 100644
--- a/pkgs/development/python-modules/flask-jwt-extended/default.nix
+++ b/pkgs/development/python-modules/flask-jwt-extended/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, dateutil, flask, pyjwt, werkzeug, pytest }:
+{ lib, buildPythonPackage, fetchPypi, dateutil, flask, pyjwt, werkzeug, pytest }:
 
 buildPythonPackage rec {
   pname = "Flask-JWT-Extended";
diff --git a/pkgs/development/python-modules/flask-ldap-login/default.nix b/pkgs/development/python-modules/flask-ldap-login/default.nix
index 1673ca24e6e0..08aa2efb8f2c 100644
--- a/pkgs/development/python-modules/flask-ldap-login/default.nix
+++ b/pkgs/development/python-modules/flask-ldap-login/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, isPy3k, fetchFromGitHub, fetchpatch
+{ lib, buildPythonPackage, isPy3k, fetchFromGitHub, fetchpatch
 , flask, flask_wtf, flask_testing, ldap
 , mock, nose }:
 
diff --git a/pkgs/development/python-modules/flask-limiter/default.nix b/pkgs/development/python-modules/flask-limiter/default.nix
index 38d42da1c8a7..d22096f91494 100644
--- a/pkgs/development/python-modules/flask-limiter/default.nix
+++ b/pkgs/development/python-modules/flask-limiter/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, flask, limits }:
+{ lib, fetchPypi, buildPythonPackage, flask, limits }:
 
 buildPythonPackage rec {
   pname = "Flask-Limiter";
diff --git a/pkgs/development/python-modules/flask-login/default.nix b/pkgs/development/python-modules/flask-login/default.nix
index 919e353eb8e0..9d54849e92d9 100644
--- a/pkgs/development/python-modules/flask-login/default.nix
+++ b/pkgs/development/python-modules/flask-login/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pythonAtLeast
+{ lib, buildPythonPackage, fetchPypi, pythonAtLeast
 , flask, blinker, nose, mock, semantic-version }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/flask-reverse-proxy-fix/default.nix b/pkgs/development/python-modules/flask-reverse-proxy-fix/default.nix
index 550f6520e7db..18e483292885 100644
--- a/pkgs/development/python-modules/flask-reverse-proxy-fix/default.nix
+++ b/pkgs/development/python-modules/flask-reverse-proxy-fix/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , isPy3k
diff --git a/pkgs/development/python-modules/flask-silk/default.nix b/pkgs/development/python-modules/flask-silk/default.nix
index 92d2f90848cb..f6b6fd81528f 100644
--- a/pkgs/development/python-modules/flask-silk/default.nix
+++ b/pkgs/development/python-modules/flask-silk/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , flask
diff --git a/pkgs/development/python-modules/flask-sqlalchemy/default.nix b/pkgs/development/python-modules/flask-sqlalchemy/default.nix
index 16b8c9c7fc79..1bac82fb44f6 100644
--- a/pkgs/development/python-modules/flask-sqlalchemy/default.nix
+++ b/pkgs/development/python-modules/flask-sqlalchemy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, flask, mock, sqlalchemy, pytest }:
+{ lib, buildPythonPackage, fetchPypi, flask, mock, sqlalchemy, pytest }:
 
 buildPythonPackage rec {
   pname = "Flask-SQLAlchemy";
diff --git a/pkgs/development/python-modules/flask-swagger-ui/default.nix b/pkgs/development/python-modules/flask-swagger-ui/default.nix
index 79650e7c1755..d238ba5acb75 100644
--- a/pkgs/development/python-modules/flask-swagger-ui/default.nix
+++ b/pkgs/development/python-modules/flask-swagger-ui/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, flask }:
+{ lib, buildPythonPackage, fetchPypi, flask }:
 
 buildPythonPackage rec {
   pname = "flask-swagger-ui";
diff --git a/pkgs/development/python-modules/flask-swagger/default.nix b/pkgs/development/python-modules/flask-swagger/default.nix
index 20624c318620..66c45b855223 100644
--- a/pkgs/development/python-modules/flask-swagger/default.nix
+++ b/pkgs/development/python-modules/flask-swagger/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , flask, pyyaml }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/flask-versioned/default.nix b/pkgs/development/python-modules/flask-versioned/default.nix
index 15e7b2c1875d..e30abdb7cb44 100644
--- a/pkgs/development/python-modules/flask-versioned/default.nix
+++ b/pkgs/development/python-modules/flask-versioned/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, flask }:
+{ lib, buildPythonPackage, fetchFromGitHub, flask }:
 
 buildPythonPackage rec {
   pname = "Flask-Versioned";
diff --git a/pkgs/development/python-modules/flask-wtf/default.nix b/pkgs/development/python-modules/flask-wtf/default.nix
index eadc7842a013..00af0ce61e9a 100644
--- a/pkgs/development/python-modules/flask-wtf/default.nix
+++ b/pkgs/development/python-modules/flask-wtf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, flask, wtforms, nose }:
+{ lib, fetchPypi, buildPythonPackage, flask, wtforms, nose }:
 
 buildPythonPackage rec {
   pname = "Flask-WTF";
diff --git a/pkgs/development/python-modules/flask/default.nix b/pkgs/development/python-modules/flask/default.nix
index d121b4e32c8b..27f436c3c53c 100644
--- a/pkgs/development/python-modules/flask/default.nix
+++ b/pkgs/development/python-modules/flask/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , itsdangerous, click, werkzeug, jinja2, pytest }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/flaskbabel/default.nix b/pkgs/development/python-modules/flaskbabel/default.nix
index eef31359f504..d15950bba9a4 100644
--- a/pkgs/development/python-modules/flaskbabel/default.nix
+++ b/pkgs/development/python-modules/flaskbabel/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , flask
diff --git a/pkgs/development/python-modules/flowlogs_reader/default.nix b/pkgs/development/python-modules/flowlogs_reader/default.nix
index 1a6591040a2e..9fd36fab2941 100644
--- a/pkgs/development/python-modules/flowlogs_reader/default.nix
+++ b/pkgs/development/python-modules/flowlogs_reader/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/flup/default.nix b/pkgs/development/python-modules/flup/default.nix
index 52ac5da27aa1..fa19d9bdf7a5 100644
--- a/pkgs/development/python-modules/flup/default.nix
+++ b/pkgs/development/python-modules/flup/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , isPy3k
 , fetchPypi
diff --git a/pkgs/development/python-modules/flux-led/default.nix b/pkgs/development/python-modules/flux-led/default.nix
index ddec811e21ce..64eafed6c198 100644
--- a/pkgs/development/python-modules/flux-led/default.nix
+++ b/pkgs/development/python-modules/flux-led/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub
+{ lib, buildPythonPackage, fetchFromGitHub
 , aiohttp, zigpy
 , pytest, isPy27 }:
 
diff --git a/pkgs/development/python-modules/foolscap/default.nix b/pkgs/development/python-modules/foolscap/default.nix
index 396bef6d009e..e0d38a5a1313 100644
--- a/pkgs/development/python-modules/foolscap/default.nix
+++ b/pkgs/development/python-modules/foolscap/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , mock
diff --git a/pkgs/development/python-modules/forbiddenfruit/default.nix b/pkgs/development/python-modules/forbiddenfruit/default.nix
index 64713d96adea..1bb3b17e9df3 100644
--- a/pkgs/development/python-modules/forbiddenfruit/default.nix
+++ b/pkgs/development/python-modules/forbiddenfruit/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/foxdot/default.nix b/pkgs/development/python-modules/foxdot/default.nix
index d60c1e89900a..072129e6ea5a 100644
--- a/pkgs/development/python-modules/foxdot/default.nix
+++ b/pkgs/development/python-modules/foxdot/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, tkinter, supercollider }:
+{ lib, buildPythonPackage, fetchPypi, tkinter, supercollider }:
 
 buildPythonPackage rec {
   pname = "FoxDot";
diff --git a/pkgs/development/python-modules/freezegun/0.3.nix b/pkgs/development/python-modules/freezegun/0.3.nix
index 9dc88596f267..09ce8bbd11b1 100644
--- a/pkgs/development/python-modules/freezegun/0.3.nix
+++ b/pkgs/development/python-modules/freezegun/0.3.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/freezegun/default.nix b/pkgs/development/python-modules/freezegun/default.nix
index f1b1d9738d72..4c5a87e8266b 100644
--- a/pkgs/development/python-modules/freezegun/default.nix
+++ b/pkgs/development/python-modules/freezegun/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , pythonOlder
 , fetchPypi
diff --git a/pkgs/development/python-modules/fritzconnection/default.nix b/pkgs/development/python-modules/fritzconnection/default.nix
index 571fba1a8acd..b8312d1c8ec5 100644
--- a/pkgs/development/python-modules/fritzconnection/default.nix
+++ b/pkgs/development/python-modules/fritzconnection/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, pythonOlder, fetchFromGitHub, pytestCheckHook, requests }:
+{ lib, buildPythonPackage, pythonOlder, fetchFromGitHub, pytestCheckHook, requests }:
 
 buildPythonPackage rec {
   pname = "fritzconnection";
diff --git a/pkgs/development/python-modules/frozendict/default.nix b/pkgs/development/python-modules/frozendict/default.nix
index dd0c99298265..e172f3815b7e 100644
--- a/pkgs/development/python-modules/frozendict/default.nix
+++ b/pkgs/development/python-modules/frozendict/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "frozendict";
diff --git a/pkgs/development/python-modules/ftfy/default.nix b/pkgs/development/python-modules/ftfy/default.nix
index 63342c7045d0..dbc363172288 100644
--- a/pkgs/development/python-modules/ftfy/default.nix
+++ b/pkgs/development/python-modules/ftfy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , isPy3k
 , fetchPypi
diff --git a/pkgs/development/python-modules/fudge/default.nix b/pkgs/development/python-modules/fudge/default.nix
index 3f53b66d1efa..ba97b2e8f47a 100644
--- a/pkgs/development/python-modules/fudge/default.nix
+++ b/pkgs/development/python-modules/fudge/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/funcparserlib/default.nix b/pkgs/development/python-modules/funcparserlib/default.nix
index 773ed1dccd67..19e2dd146d20 100644
--- a/pkgs/development/python-modules/funcparserlib/default.nix
+++ b/pkgs/development/python-modules/funcparserlib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , python
diff --git a/pkgs/development/python-modules/funcsigs/default.nix b/pkgs/development/python-modules/funcsigs/default.nix
index 1464baa57df2..8a7335accda4 100644
--- a/pkgs/development/python-modules/funcsigs/default.nix
+++ b/pkgs/development/python-modules/funcsigs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , isPyPy, isPy3k, unittest2
 }:
 
diff --git a/pkgs/development/python-modules/functools32/default.nix b/pkgs/development/python-modules/functools32/default.nix
index cec9da423958..be907e963c10 100644
--- a/pkgs/development/python-modules/functools32/default.nix
+++ b/pkgs/development/python-modules/functools32/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/funcy/default.nix b/pkgs/development/python-modules/funcy/default.nix
index 3db08cf22bbd..515f0925cafa 100644
--- a/pkgs/development/python-modules/funcy/default.nix
+++ b/pkgs/development/python-modules/funcy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/furl/default.nix b/pkgs/development/python-modules/furl/default.nix
index b7592885007e..72089da11e10 100644
--- a/pkgs/development/python-modules/furl/default.nix
+++ b/pkgs/development/python-modules/furl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, flake8, six, orderedmultidict, pytest }:
+{ lib, buildPythonPackage, fetchPypi, flake8, six, orderedmultidict, pytest }:
 
 buildPythonPackage rec {
   pname = "furl";
diff --git a/pkgs/development/python-modules/fuse-python/default.nix b/pkgs/development/python-modules/fuse-python/default.nix
index a130fab0d7eb..14f2cb584ea8 100644
--- a/pkgs/development/python-modules/fuse-python/default.nix
+++ b/pkgs/development/python-modules/fuse-python/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pkg-config, fuse }:
+{ lib, buildPythonPackage, fetchPypi, pkg-config, fuse }:
 
 buildPythonPackage rec {
   pname = "fuse-python";
diff --git a/pkgs/development/python-modules/fusepy/default.nix b/pkgs/development/python-modules/fusepy/default.nix
index 858d3e13ea0c..45b708630427 100644
--- a/pkgs/development/python-modules/fusepy/default.nix
+++ b/pkgs/development/python-modules/fusepy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pkgs
diff --git a/pkgs/development/python-modules/fuzzywuzzy/default.nix b/pkgs/development/python-modules/fuzzywuzzy/default.nix
index c2d16a559842..0bcf8efc359e 100644
--- a/pkgs/development/python-modules/fuzzywuzzy/default.nix
+++ b/pkgs/development/python-modules/fuzzywuzzy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, python-Levenshtein, pycodestyle, hypothesis, pytest }:
+{ lib, buildPythonPackage, fetchPypi, python-Levenshtein, pycodestyle, hypothesis, pytest }:
 
 buildPythonPackage rec {
   pname = "fuzzywuzzy";
diff --git a/pkgs/development/python-modules/gast/default.nix b/pkgs/development/python-modules/gast/default.nix
index e4dbe43ef8d7..38334d5cc6b4 100644
--- a/pkgs/development/python-modules/gast/default.nix
+++ b/pkgs/development/python-modules/gast/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, astunparse }:
+{ lib, fetchPypi, buildPythonPackage, astunparse }:
 
 buildPythonPackage rec {
   pname = "gast";
diff --git a/pkgs/development/python-modules/gateone/default.nix b/pkgs/development/python-modules/gateone/default.nix
index 981cbbb7e8c3..5c45e875e5da 100644
--- a/pkgs/development/python-modules/gateone/default.nix
+++ b/pkgs/development/python-modules/gateone/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , tornado
 , futures
diff --git a/pkgs/development/python-modules/gcovr/default.nix b/pkgs/development/python-modules/gcovr/default.nix
index bedb7f3a3755..1332777189b1 100644
--- a/pkgs/development/python-modules/gcovr/default.nix
+++ b/pkgs/development/python-modules/gcovr/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , jinja2
diff --git a/pkgs/development/python-modules/gdata/default.nix b/pkgs/development/python-modules/gdata/default.nix
index bf9c01c250ab..94430d0d9411 100644
--- a/pkgs/development/python-modules/gdata/default.nix
+++ b/pkgs/development/python-modules/gdata/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 }:
diff --git a/pkgs/development/python-modules/gdrivefs/default.nix b/pkgs/development/python-modules/gdrivefs/default.nix
index aab5efea97de..6060dc3a5bb8 100644
--- a/pkgs/development/python-modules/gdrivefs/default.nix
+++ b/pkgs/development/python-modules/gdrivefs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , isPy3k
diff --git a/pkgs/development/python-modules/geeknote/default.nix b/pkgs/development/python-modules/geeknote/default.nix
index 4eb209a8af7f..6c4165481841 100644
--- a/pkgs/development/python-modules/geeknote/default.nix
+++ b/pkgs/development/python-modules/geeknote/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , isPy27
diff --git a/pkgs/development/python-modules/genanki/default.nix b/pkgs/development/python-modules/genanki/default.nix
index f43fdabf09e5..3f217afd8bb0 100644
--- a/pkgs/development/python-modules/genanki/default.nix
+++ b/pkgs/development/python-modules/genanki/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k
+{ lib, buildPythonPackage, fetchPypi, isPy3k
 , cached-property, frozendict, pystache, pyyaml, pytest, pytestrunner
 }:
 
diff --git a/pkgs/development/python-modules/genshi/default.nix b/pkgs/development/python-modules/genshi/default.nix
index 9a6e4508e30e..c476960bbf83 100644
--- a/pkgs/development/python-modules/genshi/default.nix
+++ b/pkgs/development/python-modules/genshi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , setuptools
diff --git a/pkgs/development/python-modules/genzshcomp/default.nix b/pkgs/development/python-modules/genzshcomp/default.nix
index 8f486cc29efb..a848eff41a65 100644
--- a/pkgs/development/python-modules/genzshcomp/default.nix
+++ b/pkgs/development/python-modules/genzshcomp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , setuptools
diff --git a/pkgs/development/python-modules/geoalchemy2/default.nix b/pkgs/development/python-modules/geoalchemy2/default.nix
index 56f9346668f6..b629d48c61f6 100644
--- a/pkgs/development/python-modules/geoalchemy2/default.nix
+++ b/pkgs/development/python-modules/geoalchemy2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , sqlalchemy
diff --git a/pkgs/development/python-modules/geographiclib/default.nix b/pkgs/development/python-modules/geographiclib/default.nix
index 98c1ee417e43..5167b9866049 100644
--- a/pkgs/development/python-modules/geographiclib/default.nix
+++ b/pkgs/development/python-modules/geographiclib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/geopy/2.nix b/pkgs/development/python-modules/geopy/2.nix
index ae4e07e25479..48df43e22173 100644
--- a/pkgs/development/python-modules/geopy/2.nix
+++ b/pkgs/development/python-modules/geopy/2.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/gevent-socketio/default.nix b/pkgs/development/python-modules/gevent-socketio/default.nix
index 88d1089d5a31..4a25e0d7e148 100644
--- a/pkgs/development/python-modules/gevent-socketio/default.nix
+++ b/pkgs/development/python-modules/gevent-socketio/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , versiontools
diff --git a/pkgs/development/python-modules/gevent-websocket/default.nix b/pkgs/development/python-modules/gevent-websocket/default.nix
index 431a0c09a30c..7ff62a378ca9 100644
--- a/pkgs/development/python-modules/gevent-websocket/default.nix
+++ b/pkgs/development/python-modules/gevent-websocket/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/gevent/default.nix b/pkgs/development/python-modules/gevent/default.nix
index 0fcf6cdfaaa9..3fe9e648ce32 100644
--- a/pkgs/development/python-modules/gevent/default.nix
+++ b/pkgs/development/python-modules/gevent/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, isPyPy, python, libev, greenlet
+{ lib, fetchPypi, buildPythonPackage, isPyPy, python, libev, greenlet
 , zope_interface
 }:
 
diff --git a/pkgs/development/python-modules/geventhttpclient/default.nix b/pkgs/development/python-modules/geventhttpclient/default.nix
index fafbef12bd3a..c82da3c8a98e 100644
--- a/pkgs/development/python-modules/geventhttpclient/default.nix
+++ b/pkgs/development/python-modules/geventhttpclient/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/ghdiff/default.nix b/pkgs/development/python-modules/ghdiff/default.nix
index a9582648117a..efbdc2f59f9a 100644
--- a/pkgs/development/python-modules/ghdiff/default.nix
+++ b/pkgs/development/python-modules/ghdiff/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , zope_testrunner, six, chardet}:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/gipc/default.nix b/pkgs/development/python-modules/gipc/default.nix
index a48547f29099..8df2808328fb 100644
--- a/pkgs/development/python-modules/gipc/default.nix
+++ b/pkgs/development/python-modules/gipc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , gevent
diff --git a/pkgs/development/python-modules/git-annex-adapter/default.nix b/pkgs/development/python-modules/git-annex-adapter/default.nix
index 5922377ab3a1..d41874cff3b5 100644
--- a/pkgs/development/python-modules/git-annex-adapter/default.nix
+++ b/pkgs/development/python-modules/git-annex-adapter/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, isPy3k, fetchFromGitHub, fetchpatch, substituteAll
+{ lib, buildPythonPackage, isPy3k, fetchFromGitHub, fetchpatch, substituteAll
 , python, util-linux, pygit2, gitMinimal, git-annex, cacert
 }:
 
diff --git a/pkgs/development/python-modules/git-sweep/default.nix b/pkgs/development/python-modules/git-sweep/default.nix
index adb9de4dbc0d..2b17a46190b6 100644
--- a/pkgs/development/python-modules/git-sweep/default.nix
+++ b/pkgs/development/python-modules/git-sweep/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , GitPython
diff --git a/pkgs/development/python-modules/globre/default.nix b/pkgs/development/python-modules/globre/default.nix
index 21d2983ab015..5debd1d0ab65 100644
--- a/pkgs/development/python-modules/globre/default.nix
+++ b/pkgs/development/python-modules/globre/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , pythonAtLeast
 , buildPythonPackage
 , fetchPypi
diff --git a/pkgs/development/python-modules/glom/default.nix b/pkgs/development/python-modules/glom/default.nix
index 2acc87a17ac4..89f0de474901 100644
--- a/pkgs/development/python-modules/glom/default.nix
+++ b/pkgs/development/python-modules/glom/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , boltons
diff --git a/pkgs/development/python-modules/gmpy2/default.nix b/pkgs/development/python-modules/gmpy2/default.nix
index 808b918681bb..204415d75315 100644
--- a/pkgs/development/python-modules/gmpy2/default.nix
+++ b/pkgs/development/python-modules/gmpy2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , fetchpatch
diff --git a/pkgs/development/python-modules/gmusicapi/default.nix b/pkgs/development/python-modules/gmusicapi/default.nix
index 821e0ba0afa9..1797f1d4264d 100644
--- a/pkgs/development/python-modules/gmusicapi/default.nix
+++ b/pkgs/development/python-modules/gmusicapi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , validictory
diff --git a/pkgs/development/python-modules/gnureadline/default.nix b/pkgs/development/python-modules/gnureadline/default.nix
index 71116c37041b..6f3ae30e8cde 100644
--- a/pkgs/development/python-modules/gnureadline/default.nix
+++ b/pkgs/development/python-modules/gnureadline/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPyPy
diff --git a/pkgs/development/python-modules/gnutls/default.nix b/pkgs/development/python-modules/gnutls/default.nix
index addbee81bd3f..3c68a1713a0a 100644
--- a/pkgs/development/python-modules/gnutls/default.nix
+++ b/pkgs/development/python-modules/gnutls/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/goobook/default.nix b/pkgs/development/python-modules/goobook/default.nix
index c587c928e7e7..83175b6c86a5 100644
--- a/pkgs/development/python-modules/goobook/default.nix
+++ b/pkgs/development/python-modules/goobook/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k
+{ lib, buildPythonPackage, fetchPypi, isPy3k
 , docutils, installShellFiles
 , google_api_python_client, simplejson, oauth2client, setuptools, xdg
 }:
diff --git a/pkgs/development/python-modules/google-apputils/default.nix b/pkgs/development/python-modules/google-apputils/default.nix
index 7cc7f4858826..321837f56aec 100644
--- a/pkgs/development/python-modules/google-apputils/default.nix
+++ b/pkgs/development/python-modules/google-apputils/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/google-auth/default.nix b/pkgs/development/python-modules/google-auth/default.nix
index 9120f93a3bdd..22b02552cd75 100644
--- a/pkgs/development/python-modules/google-auth/default.nix
+++ b/pkgs/development/python-modules/google-auth/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchpatch
 , fetchPypi
diff --git a/pkgs/development/python-modules/google-cloud-asset/default.nix b/pkgs/development/python-modules/google-cloud-asset/default.nix
index 8f04fb7451d2..aec3b51acb5e 100644
--- a/pkgs/development/python-modules/google-cloud-asset/default.nix
+++ b/pkgs/development/python-modules/google-cloud-asset/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , grpc_google_iam_v1
diff --git a/pkgs/development/python-modules/google-cloud-automl/default.nix b/pkgs/development/python-modules/google-cloud-automl/default.nix
index 302ce8ceaed3..83fe052a5422 100644
--- a/pkgs/development/python-modules/google-cloud-automl/default.nix
+++ b/pkgs/development/python-modules/google-cloud-automl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytestCheckHook
diff --git a/pkgs/development/python-modules/google-cloud-bigquery-datatransfer/default.nix b/pkgs/development/python-modules/google-cloud-bigquery-datatransfer/default.nix
index 4ec12a8fa2fb..8f67fed79d7a 100644
--- a/pkgs/development/python-modules/google-cloud-bigquery-datatransfer/default.nix
+++ b/pkgs/development/python-modules/google-cloud-bigquery-datatransfer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , google-api-core
diff --git a/pkgs/development/python-modules/google-cloud-bigquery/default.nix b/pkgs/development/python-modules/google-cloud-bigquery/default.nix
index 5eab2c730f7d..a99588199bf4 100644
--- a/pkgs/development/python-modules/google-cloud-bigquery/default.nix
+++ b/pkgs/development/python-modules/google-cloud-bigquery/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytestCheckHook
diff --git a/pkgs/development/python-modules/google-cloud-bigtable/default.nix b/pkgs/development/python-modules/google-cloud-bigtable/default.nix
index 9632dc902d15..93cbc22b7cd8 100644
--- a/pkgs/development/python-modules/google-cloud-bigtable/default.nix
+++ b/pkgs/development/python-modules/google-cloud-bigtable/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , grpc_google_iam_v1
diff --git a/pkgs/development/python-modules/google-cloud-container/default.nix b/pkgs/development/python-modules/google-cloud-container/default.nix
index 6d91bed83ae7..1cf94d220e69 100644
--- a/pkgs/development/python-modules/google-cloud-container/default.nix
+++ b/pkgs/development/python-modules/google-cloud-container/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , google-api-core
diff --git a/pkgs/development/python-modules/google-cloud-core/default.nix b/pkgs/development/python-modules/google-cloud-core/default.nix
index 72709c62ceca..44764a4edb1c 100644
--- a/pkgs/development/python-modules/google-cloud-core/default.nix
+++ b/pkgs/development/python-modules/google-cloud-core/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
diff --git a/pkgs/development/python-modules/google-cloud-dataproc/default.nix b/pkgs/development/python-modules/google-cloud-dataproc/default.nix
index 1b7a570fed21..095e01fbbd76 100644
--- a/pkgs/development/python-modules/google-cloud-dataproc/default.nix
+++ b/pkgs/development/python-modules/google-cloud-dataproc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , google-api-core
diff --git a/pkgs/development/python-modules/google-cloud-datastore/default.nix b/pkgs/development/python-modules/google-cloud-datastore/default.nix
index 84f98550b9a3..4c8c79c7ddae 100644
--- a/pkgs/development/python-modules/google-cloud-datastore/default.nix
+++ b/pkgs/development/python-modules/google-cloud-datastore/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , google-api-core
diff --git a/pkgs/development/python-modules/google-cloud-dlp/default.nix b/pkgs/development/python-modules/google-cloud-dlp/default.nix
index 9076c1298040..451607a53579 100644
--- a/pkgs/development/python-modules/google-cloud-dlp/default.nix
+++ b/pkgs/development/python-modules/google-cloud-dlp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , google-api-core
diff --git a/pkgs/development/python-modules/google-cloud-dns/default.nix b/pkgs/development/python-modules/google-cloud-dns/default.nix
index 0636da60e9af..fa4c8c6c52df 100644
--- a/pkgs/development/python-modules/google-cloud-dns/default.nix
+++ b/pkgs/development/python-modules/google-cloud-dns/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , google-api-core
diff --git a/pkgs/development/python-modules/google-cloud-error-reporting/default.nix b/pkgs/development/python-modules/google-cloud-error-reporting/default.nix
index b3181f8fcded..1457c044fe54 100644
--- a/pkgs/development/python-modules/google-cloud-error-reporting/default.nix
+++ b/pkgs/development/python-modules/google-cloud-error-reporting/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytestCheckHook
diff --git a/pkgs/development/python-modules/google-cloud-firestore/default.nix b/pkgs/development/python-modules/google-cloud-firestore/default.nix
index f0c235ca0c98..30ef0af76a1a 100644
--- a/pkgs/development/python-modules/google-cloud-firestore/default.nix
+++ b/pkgs/development/python-modules/google-cloud-firestore/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , aiounittest
diff --git a/pkgs/development/python-modules/google-cloud-iot/default.nix b/pkgs/development/python-modules/google-cloud-iot/default.nix
index 2b28f84a3158..ac511f806472 100644
--- a/pkgs/development/python-modules/google-cloud-iot/default.nix
+++ b/pkgs/development/python-modules/google-cloud-iot/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , grpc_google_iam_v1
diff --git a/pkgs/development/python-modules/google-cloud-kms/default.nix b/pkgs/development/python-modules/google-cloud-kms/default.nix
index 6675767a2445..94dd7c1ba8ff 100644
--- a/pkgs/development/python-modules/google-cloud-kms/default.nix
+++ b/pkgs/development/python-modules/google-cloud-kms/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytestCheckHook
diff --git a/pkgs/development/python-modules/google-cloud-language/default.nix b/pkgs/development/python-modules/google-cloud-language/default.nix
index 7186ecd6f355..c43c51d97f74 100644
--- a/pkgs/development/python-modules/google-cloud-language/default.nix
+++ b/pkgs/development/python-modules/google-cloud-language/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , google-api-core
diff --git a/pkgs/development/python-modules/google-cloud-logging/default.nix b/pkgs/development/python-modules/google-cloud-logging/default.nix
index 58d03f206fc7..b8ffa935fc36 100644
--- a/pkgs/development/python-modules/google-cloud-logging/default.nix
+++ b/pkgs/development/python-modules/google-cloud-logging/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , django
diff --git a/pkgs/development/python-modules/google-cloud-monitoring/default.nix b/pkgs/development/python-modules/google-cloud-monitoring/default.nix
index 8dc665fe2103..f8fc079aa3e4 100644
--- a/pkgs/development/python-modules/google-cloud-monitoring/default.nix
+++ b/pkgs/development/python-modules/google-cloud-monitoring/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , google-api-core
diff --git a/pkgs/development/python-modules/google-cloud-pubsub/default.nix b/pkgs/development/python-modules/google-cloud-pubsub/default.nix
index 46a28b1ffd1d..d3846ad4f429 100644
--- a/pkgs/development/python-modules/google-cloud-pubsub/default.nix
+++ b/pkgs/development/python-modules/google-cloud-pubsub/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytestCheckHook
diff --git a/pkgs/development/python-modules/google-cloud-redis/default.nix b/pkgs/development/python-modules/google-cloud-redis/default.nix
index 4dcf7fd3d318..86fbc360d73c 100644
--- a/pkgs/development/python-modules/google-cloud-redis/default.nix
+++ b/pkgs/development/python-modules/google-cloud-redis/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , google-api-core
diff --git a/pkgs/development/python-modules/google-cloud-resource-manager/default.nix b/pkgs/development/python-modules/google-cloud-resource-manager/default.nix
index 11baf3d73f3d..8a265182fba4 100644
--- a/pkgs/development/python-modules/google-cloud-resource-manager/default.nix
+++ b/pkgs/development/python-modules/google-cloud-resource-manager/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytestCheckHook
diff --git a/pkgs/development/python-modules/google-cloud-runtimeconfig/default.nix b/pkgs/development/python-modules/google-cloud-runtimeconfig/default.nix
index 81fa97f152bb..0a3285566f19 100644
--- a/pkgs/development/python-modules/google-cloud-runtimeconfig/default.nix
+++ b/pkgs/development/python-modules/google-cloud-runtimeconfig/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , google-api-core
diff --git a/pkgs/development/python-modules/google-cloud-securitycenter/default.nix b/pkgs/development/python-modules/google-cloud-securitycenter/default.nix
index 242198a21971..184044594d52 100644
--- a/pkgs/development/python-modules/google-cloud-securitycenter/default.nix
+++ b/pkgs/development/python-modules/google-cloud-securitycenter/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , grpc_google_iam_v1
diff --git a/pkgs/development/python-modules/google-cloud-spanner/default.nix b/pkgs/development/python-modules/google-cloud-spanner/default.nix
index 382476af0ca3..759a8f25c1af 100644
--- a/pkgs/development/python-modules/google-cloud-spanner/default.nix
+++ b/pkgs/development/python-modules/google-cloud-spanner/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , grpc_google_iam_v1
diff --git a/pkgs/development/python-modules/google-cloud-speech/default.nix b/pkgs/development/python-modules/google-cloud-speech/default.nix
index 3359cfdd743a..c57329eebcc3 100644
--- a/pkgs/development/python-modules/google-cloud-speech/default.nix
+++ b/pkgs/development/python-modules/google-cloud-speech/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , google-api-core
diff --git a/pkgs/development/python-modules/google-cloud-tasks/default.nix b/pkgs/development/python-modules/google-cloud-tasks/default.nix
index e30986af6106..5911bfe61562 100644
--- a/pkgs/development/python-modules/google-cloud-tasks/default.nix
+++ b/pkgs/development/python-modules/google-cloud-tasks/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , google-api-core
diff --git a/pkgs/development/python-modules/google-cloud-testutils/default.nix b/pkgs/development/python-modules/google-cloud-testutils/default.nix
index 3f6792fa77b7..2380e9183b73 100644
--- a/pkgs/development/python-modules/google-cloud-testutils/default.nix
+++ b/pkgs/development/python-modules/google-cloud-testutils/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, google-auth, six }:
+{ lib, buildPythonPackage, fetchPypi, google-auth, six }:
 
 buildPythonPackage rec {
   pname = "google-cloud-testutils";
diff --git a/pkgs/development/python-modules/google-cloud-texttospeech/default.nix b/pkgs/development/python-modules/google-cloud-texttospeech/default.nix
index a7228a42999b..3c84c21344a9 100644
--- a/pkgs/development/python-modules/google-cloud-texttospeech/default.nix
+++ b/pkgs/development/python-modules/google-cloud-texttospeech/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytestCheckHook
diff --git a/pkgs/development/python-modules/google-cloud-trace/default.nix b/pkgs/development/python-modules/google-cloud-trace/default.nix
index 1252c99bf486..486a71c7a97e 100644
--- a/pkgs/development/python-modules/google-cloud-trace/default.nix
+++ b/pkgs/development/python-modules/google-cloud-trace/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , google-api-core
diff --git a/pkgs/development/python-modules/google-cloud-translate/default.nix b/pkgs/development/python-modules/google-cloud-translate/default.nix
index 32d402e1cf03..2b0ac55fa2eb 100644
--- a/pkgs/development/python-modules/google-cloud-translate/default.nix
+++ b/pkgs/development/python-modules/google-cloud-translate/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytestCheckHook
diff --git a/pkgs/development/python-modules/google-cloud-videointelligence/default.nix b/pkgs/development/python-modules/google-cloud-videointelligence/default.nix
index 43fed1fe27fa..26e3320a5ccb 100644
--- a/pkgs/development/python-modules/google-cloud-videointelligence/default.nix
+++ b/pkgs/development/python-modules/google-cloud-videointelligence/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , mock
diff --git a/pkgs/development/python-modules/google-cloud-vision/default.nix b/pkgs/development/python-modules/google-cloud-vision/default.nix
index 57a51f96e65e..12f63bd0e1c4 100644
--- a/pkgs/development/python-modules/google-cloud-vision/default.nix
+++ b/pkgs/development/python-modules/google-cloud-vision/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , google-api-core
diff --git a/pkgs/development/python-modules/google-cloud-websecurityscanner/default.nix b/pkgs/development/python-modules/google-cloud-websecurityscanner/default.nix
index 20614f5b5d86..ac91ab85bd64 100644
--- a/pkgs/development/python-modules/google-cloud-websecurityscanner/default.nix
+++ b/pkgs/development/python-modules/google-cloud-websecurityscanner/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytestCheckHook
diff --git a/pkgs/development/python-modules/googleapis_common_protos/default.nix b/pkgs/development/python-modules/googleapis_common_protos/default.nix
index 7e5b786b4fba..898971629ae0 100644
--- a/pkgs/development/python-modules/googleapis_common_protos/default.nix
+++ b/pkgs/development/python-modules/googleapis_common_protos/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , grpc
diff --git a/pkgs/development/python-modules/googlemaps/default.nix b/pkgs/development/python-modules/googlemaps/default.nix
index c971119833e6..007d4eb2cea7 100644
--- a/pkgs/development/python-modules/googlemaps/default.nix
+++ b/pkgs/development/python-modules/googlemaps/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , requests
diff --git a/pkgs/development/python-modules/gorilla/default.nix b/pkgs/development/python-modules/gorilla/default.nix
index bf4212edc510..42da45416470 100644
--- a/pkgs/development/python-modules/gorilla/default.nix
+++ b/pkgs/development/python-modules/gorilla/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi}:
+{ lib, buildPythonPackage, fetchPypi}:
 
 buildPythonPackage rec {
   pname = "gorilla";
diff --git a/pkgs/development/python-modules/gpapi/default.nix b/pkgs/development/python-modules/gpapi/default.nix
index 788473b5ab8f..6ed9f48dd61c 100644
--- a/pkgs/development/python-modules/gpapi/default.nix
+++ b/pkgs/development/python-modules/gpapi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pythonOlder
+{ lib, buildPythonPackage, fetchPypi, pythonOlder
 , requests
 , protobuf
 , pycryptodome
diff --git a/pkgs/development/python-modules/gphoto2/default.nix b/pkgs/development/python-modules/gphoto2/default.nix
index 0dd68918aed6..31ac03347cb2 100644
--- a/pkgs/development/python-modules/gphoto2/default.nix
+++ b/pkgs/development/python-modules/gphoto2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage
+{ lib, fetchPypi, buildPythonPackage
 , pkg-config
 , libgphoto2 }:
 
diff --git a/pkgs/development/python-modules/gplaycli/default.nix b/pkgs/development/python-modules/gplaycli/default.nix
index ecd52ad848c9..28f244bc354c 100644
--- a/pkgs/development/python-modules/gplaycli/default.nix
+++ b/pkgs/development/python-modules/gplaycli/default.nix
@@ -1,4 +1,4 @@
-{ buildPythonPackage, lib, stdenv, libffi, isPy3k, pyasn1, clint, ndg-httpsclient
+{ buildPythonPackage, lib, libffi, isPy3k, pyasn1, clint, ndg-httpsclient
 , protobuf, requests, args, gpapi, pyaxmlparser, fetchFromGitHub
 }:
 
diff --git a/pkgs/development/python-modules/gpsoauth/default.nix b/pkgs/development/python-modules/gpsoauth/default.nix
index 2c4dfcd81395..1ad50642e2b9 100644
--- a/pkgs/development/python-modules/gpsoauth/default.nix
+++ b/pkgs/development/python-modules/gpsoauth/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , cffi
diff --git a/pkgs/development/python-modules/gpyopt/default.nix b/pkgs/development/python-modules/gpyopt/default.nix
index 22e6743582c2..85b6efabaa8c 100644
--- a/pkgs/development/python-modules/gpyopt/default.nix
+++ b/pkgs/development/python-modules/gpyopt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, setuptools
+{ lib, buildPythonPackage, fetchFromGitHub, setuptools
 , numpy, scipy, gpy, emcee, nose }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/gradient_sdk/default.nix b/pkgs/development/python-modules/gradient_sdk/default.nix
index adaafd8eadbe..3dffb38f2ffc 100644
--- a/pkgs/development/python-modules/gradient_sdk/default.nix
+++ b/pkgs/development/python-modules/gradient_sdk/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage
+{ lib, fetchPypi, buildPythonPackage
 , hyperopt
 }:
 
diff --git a/pkgs/development/python-modules/gradient_statsd/default.nix b/pkgs/development/python-modules/gradient_statsd/default.nix
index 607737d99ae0..ada005d14f8e 100644
--- a/pkgs/development/python-modules/gradient_statsd/default.nix
+++ b/pkgs/development/python-modules/gradient_statsd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage
+{ lib, fetchPypi, buildPythonPackage
 , boto3, requests, datadog, configparser, python
 }:
 
diff --git a/pkgs/development/python-modules/graphite-web/default.nix b/pkgs/development/python-modules/graphite-web/default.nix
index 0bced13cd112..17ac91329163 100644
--- a/pkgs/development/python-modules/graphite-web/default.nix
+++ b/pkgs/development/python-modules/graphite-web/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k
+{ lib, buildPythonPackage, fetchPypi, isPy3k
 , django, django_tagging, whisper, pycairo, cairocffi, ldap, memcached, pytz, urllib3, scandir
 }:
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/graphite_beacon/default.nix b/pkgs/development/python-modules/graphite_beacon/default.nix
index 06b66ccbc145..20522d283045 100644
--- a/pkgs/development/python-modules/graphite_beacon/default.nix
+++ b/pkgs/development/python-modules/graphite_beacon/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , tornado_5, pyyaml, funcparserlib
 , nixosTests
 }:
diff --git a/pkgs/development/python-modules/grappelli_safe/default.nix b/pkgs/development/python-modules/grappelli_safe/default.nix
index 7b2dd7e3fedd..ae7ddb0c76b4 100644
--- a/pkgs/development/python-modules/grappelli_safe/default.nix
+++ b/pkgs/development/python-modules/grappelli_safe/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/grequests/default.nix b/pkgs/development/python-modules/grequests/default.nix
index 5ce5df8cdea2..50c95df7dc91 100644
--- a/pkgs/development/python-modules/grequests/default.nix
+++ b/pkgs/development/python-modules/grequests/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , requests
diff --git a/pkgs/development/python-modules/grip/default.nix b/pkgs/development/python-modules/grip/default.nix
index 019cd798d640..dafa692493e3 100644
--- a/pkgs/development/python-modules/grip/default.nix
+++ b/pkgs/development/python-modules/grip/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , fetchpatch
 # Python bits:
diff --git a/pkgs/development/python-modules/grpc_google_iam_v1/default.nix b/pkgs/development/python-modules/grpc_google_iam_v1/default.nix
index dd9527006dad..7291cd4b65e0 100644
--- a/pkgs/development/python-modules/grpc_google_iam_v1/default.nix
+++ b/pkgs/development/python-modules/grpc_google_iam_v1/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , grpcio
diff --git a/pkgs/development/python-modules/grpcio-gcp/default.nix b/pkgs/development/python-modules/grpcio-gcp/default.nix
index 1b631c0973ed..656e147ac50a 100644
--- a/pkgs/development/python-modules/grpcio-gcp/default.nix
+++ b/pkgs/development/python-modules/grpcio-gcp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , grpcio
diff --git a/pkgs/development/python-modules/gsd/1.7.nix b/pkgs/development/python-modules/gsd/1.7.nix
index 0512a4906a27..8d19acdc70de 100644
--- a/pkgs/development/python-modules/gsd/1.7.nix
+++ b/pkgs/development/python-modules/gsd/1.7.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , numpy
diff --git a/pkgs/development/python-modules/gspread/default.nix b/pkgs/development/python-modules/gspread/default.nix
index 7cf2a8c8df11..0370f80b4a40 100644
--- a/pkgs/development/python-modules/gspread/default.nix
+++ b/pkgs/development/python-modules/gspread/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , requests
diff --git a/pkgs/development/python-modules/gst-python/default.nix b/pkgs/development/python-modules/gst-python/default.nix
index 9ff8434cc9aa..ea89f7214c63 100644
--- a/pkgs/development/python-modules/gst-python/default.nix
+++ b/pkgs/development/python-modules/gst-python/default.nix
@@ -3,7 +3,7 @@
 , fetchurl
 , meson
 , ninja
-, stdenv
+
 , pkg-config
 , python3
 , pygobject3
diff --git a/pkgs/development/python-modules/gtimelog/default.nix b/pkgs/development/python-modules/gtimelog/default.nix
index 3af8e97ba71b..bb31baa78880 100644
--- a/pkgs/development/python-modules/gtimelog/default.nix
+++ b/pkgs/development/python-modules/gtimelog/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, makeWrapper
+{ lib, fetchFromGitHub, makeWrapper
 , glibcLocales, gobject-introspection, gtk3, libsoup, libsecret
 , buildPythonPackage, python
 , pygobject3, freezegun, mock
diff --git a/pkgs/development/python-modules/guestfs/default.nix b/pkgs/development/python-modules/guestfs/default.nix
index 23a2545525a3..0f1d2ddf05cc 100644
--- a/pkgs/development/python-modules/guestfs/default.nix
+++ b/pkgs/development/python-modules/guestfs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchurl, libguestfs, qemu }:
+{ lib, buildPythonPackage, fetchurl, libguestfs, qemu }:
 
 buildPythonPackage rec {
   pname = "guestfs";
diff --git a/pkgs/development/python-modules/gunicorn/19.nix b/pkgs/development/python-modules/gunicorn/19.nix
index c1091fa980c9..7d43ce95a7e3 100644
--- a/pkgs/development/python-modules/gunicorn/19.nix
+++ b/pkgs/development/python-modules/gunicorn/19.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , coverage
 , mock
 , pytest
diff --git a/pkgs/development/python-modules/gunicorn/default.nix b/pkgs/development/python-modules/gunicorn/default.nix
index 983335f4395b..3f3eceee3780 100644
--- a/pkgs/development/python-modules/gunicorn/default.nix
+++ b/pkgs/development/python-modules/gunicorn/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy27
+{ lib, buildPythonPackage, fetchPypi, isPy27
 , coverage
 , mock
 , pytest
diff --git a/pkgs/development/python-modules/guzzle_sphinx_theme/default.nix b/pkgs/development/python-modules/guzzle_sphinx_theme/default.nix
index f70625b86fe2..6f765bd98d6b 100644
--- a/pkgs/development/python-modules/guzzle_sphinx_theme/default.nix
+++ b/pkgs/development/python-modules/guzzle_sphinx_theme/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, sphinx, fetchPypi }:
+{ lib, buildPythonPackage, sphinx, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "guzzle_sphinx_theme";
diff --git a/pkgs/development/python-modules/h2/default.nix b/pkgs/development/python-modules/h2/default.nix
index 6dad775732c0..ba681658e9a2 100644
--- a/pkgs/development/python-modules/h2/default.nix
+++ b/pkgs/development/python-modules/h2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , enum34, hpack, hyperframe, pytestCheckHook, hypothesis }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/ha-ffmpeg/default.nix b/pkgs/development/python-modules/ha-ffmpeg/default.nix
index 653c4483ce82..84810fd2b532 100644
--- a/pkgs/development/python-modules/ha-ffmpeg/default.nix
+++ b/pkgs/development/python-modules/ha-ffmpeg/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k
+{ lib, buildPythonPackage, fetchPypi, isPy3k
 , ffmpeg_3, async-timeout }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/handout/default.nix b/pkgs/development/python-modules/handout/default.nix
index b2b7b4b3d142..316c9a6edcac 100644
--- a/pkgs/development/python-modules/handout/default.nix
+++ b/pkgs/development/python-modules/handout/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , imageio, imageio-ffmpeg }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/hawkauthlib/default.nix b/pkgs/development/python-modules/hawkauthlib/default.nix
index a0b7d50b560d..7afb4eefa060 100644
--- a/pkgs/development/python-modules/hawkauthlib/default.nix
+++ b/pkgs/development/python-modules/hawkauthlib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , requests
diff --git a/pkgs/development/python-modules/hbmqtt/default.nix b/pkgs/development/python-modules/hbmqtt/default.nix
index 003805f939c6..c457da918862 100644
--- a/pkgs/development/python-modules/hbmqtt/default.nix
+++ b/pkgs/development/python-modules/hbmqtt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k, pythonAtLeast, setuptools
+{ lib, buildPythonPackage, fetchPypi, isPy3k, pythonAtLeast, setuptools
 , transitions, websockets, passlib, docopt, pyyaml, nose }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/hcs_utils/default.nix b/pkgs/development/python-modules/hcs_utils/default.nix
index 56e9811396e6..5dd94e5de2ea 100644
--- a/pkgs/development/python-modules/hcs_utils/default.nix
+++ b/pkgs/development/python-modules/hcs_utils/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, pythonOlder, buildPythonPackage, fetchPypi, six, glibcLocales, pytest }:
+{ lib, pythonOlder, buildPythonPackage, fetchPypi, six, glibcLocales, pytest }:
 
 buildPythonPackage rec {
   pname = "hcs_utils";
diff --git a/pkgs/development/python-modules/hdmedians/default.nix b/pkgs/development/python-modules/hdmedians/default.nix
index 3b65e10bfcec..f1b0d13e56e5 100644
--- a/pkgs/development/python-modules/hdmedians/default.nix
+++ b/pkgs/development/python-modules/hdmedians/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/heapdict/default.nix b/pkgs/development/python-modules/heapdict/default.nix
index 4cd695925f28..61cbe39a256a 100644
--- a/pkgs/development/python-modules/heapdict/default.nix
+++ b/pkgs/development/python-modules/heapdict/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k }:
+{ lib, buildPythonPackage, fetchPypi, isPy3k }:
 
 buildPythonPackage rec {
   pname = "HeapDict";
diff --git a/pkgs/development/python-modules/helper/default.nix b/pkgs/development/python-modules/helper/default.nix
index 4c7ff0c3878f..8560364d4f41 100644
--- a/pkgs/development/python-modules/helper/default.nix
+++ b/pkgs/development/python-modules/helper/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pyyaml, mock }:
+{ lib, buildPythonPackage, fetchPypi, pyyaml, mock }:
 
 buildPythonPackage rec {
   pname = "helper";
diff --git a/pkgs/development/python-modules/hetzner/default.nix b/pkgs/development/python-modules/hetzner/default.nix
index 3b938dfc237c..9b89567d8ef5 100644
--- a/pkgs/development/python-modules/hetzner/default.nix
+++ b/pkgs/development/python-modules/hetzner/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 }:
diff --git a/pkgs/development/python-modules/heudiconv/default.nix b/pkgs/development/python-modules/heudiconv/default.nix
index ce2918188241..4e65f5b91721 100644
--- a/pkgs/development/python-modules/heudiconv/default.nix
+++ b/pkgs/development/python-modules/heudiconv/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/hglib/default.nix b/pkgs/development/python-modules/hglib/default.nix
index afac7983584c..a6ed6b935ad1 100644
--- a/pkgs/development/python-modules/hglib/default.nix
+++ b/pkgs/development/python-modules/hglib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, fetchpatch, substituteAll, python, nose, mercurial }:
+{ lib, buildPythonPackage, fetchPypi, fetchpatch, substituteAll, python, nose, mercurial }:
 
 buildPythonPackage rec {
   pname = "python-hglib";
diff --git a/pkgs/development/python-modules/hgsvn/default.nix b/pkgs/development/python-modules/hgsvn/default.nix
index 2ee6024cd475..b8b6d43b5480 100644
--- a/pkgs/development/python-modules/hgsvn/default.nix
+++ b/pkgs/development/python-modules/hgsvn/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/hieroglyph/default.nix b/pkgs/development/python-modules/hieroglyph/default.nix
index 418059c51658..d7fa9af5efae 100644
--- a/pkgs/development/python-modules/hieroglyph/default.nix
+++ b/pkgs/development/python-modules/hieroglyph/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, isPy27, sphinx }:
+{ lib, fetchPypi, buildPythonPackage, isPy27, sphinx }:
 
 buildPythonPackage rec {
   pname = "hieroglyph";
diff --git a/pkgs/development/python-modules/hiredis/default.nix b/pkgs/development/python-modules/hiredis/default.nix
index e9d5677f8beb..ef10d195671d 100644
--- a/pkgs/development/python-modules/hiredis/default.nix
+++ b/pkgs/development/python-modules/hiredis/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , redis
diff --git a/pkgs/development/python-modules/hiro/default.nix b/pkgs/development/python-modules/hiro/default.nix
index 3ff672a22db6..00b560609641 100644
--- a/pkgs/development/python-modules/hiro/default.nix
+++ b/pkgs/development/python-modules/hiro/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, six, mock }:
+{ lib, buildPythonPackage, fetchPypi, six, mock }:
 buildPythonPackage rec {
   pname = "hiro";
   version = "0.5.1";
diff --git a/pkgs/development/python-modules/hjson/default.nix b/pkgs/development/python-modules/hjson/default.nix
index 3393ad186918..096edbe5252e 100644
--- a/pkgs/development/python-modules/hjson/default.nix
+++ b/pkgs/development/python-modules/hjson/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , pythonImportsCheckHook
diff --git a/pkgs/development/python-modules/hkdf/default.nix b/pkgs/development/python-modules/hkdf/default.nix
index 966ce7001fbb..43e7a8f4ce35 100644
--- a/pkgs/development/python-modules/hkdf/default.nix
+++ b/pkgs/development/python-modules/hkdf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/hocr-tools/default.nix b/pkgs/development/python-modules/hocr-tools/default.nix
index 79a2e83508aa..cfbf63a5869d 100644
--- a/pkgs/development/python-modules/hocr-tools/default.nix
+++ b/pkgs/development/python-modules/hocr-tools/default.nix
@@ -3,7 +3,7 @@
 , lxml
 , pillow
 , reportlab
-, lib, stdenv
+, lib
 }:
 buildPythonPackage rec {
   pname = "hocr-tools";
diff --git a/pkgs/development/python-modules/holidays/default.nix b/pkgs/development/python-modules/holidays/default.nix
index b5e0062d115a..789dc57a571a 100644
--- a/pkgs/development/python-modules/holidays/default.nix
+++ b/pkgs/development/python-modules/holidays/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , convertdate
diff --git a/pkgs/development/python-modules/hpack/default.nix b/pkgs/development/python-modules/hpack/default.nix
index 9b6f724cd318..a5140a216cfd 100644
--- a/pkgs/development/python-modules/hpack/default.nix
+++ b/pkgs/development/python-modules/hpack/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/hsaudiotag/default.nix b/pkgs/development/python-modules/hsaudiotag/default.nix
index fba71dc3f109..d38ceec7e131 100644
--- a/pkgs/development/python-modules/hsaudiotag/default.nix
+++ b/pkgs/development/python-modules/hsaudiotag/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/hsaudiotag3k/default.nix b/pkgs/development/python-modules/hsaudiotag3k/default.nix
index 52919e489837..66ea895960c9 100644
--- a/pkgs/development/python-modules/hsaudiotag3k/default.nix
+++ b/pkgs/development/python-modules/hsaudiotag3k/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/html2text/2018.nix b/pkgs/development/python-modules/html2text/2018.nix
index 73540359ee1a..06d0c14c7e43 100644
--- a/pkgs/development/python-modules/html2text/2018.nix
+++ b/pkgs/development/python-modules/html2text/2018.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/html5-parser/default.nix b/pkgs/development/python-modules/html5-parser/default.nix
index 0ceeda045827..d20f0a9abfdb 100644
--- a/pkgs/development/python-modules/html5-parser/default.nix
+++ b/pkgs/development/python-modules/html5-parser/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pkgs, pkg-config, chardet, lxml }:
+{ lib, buildPythonPackage, fetchPypi, pkgs, pkg-config, chardet, lxml }:
 
 buildPythonPackage rec {
   pname = "html5-parser";
diff --git a/pkgs/development/python-modules/htmllaundry/default.nix b/pkgs/development/python-modules/htmllaundry/default.nix
index ef660fc0b924..e844c99693a2 100644
--- a/pkgs/development/python-modules/htmllaundry/default.nix
+++ b/pkgs/development/python-modules/htmllaundry/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi, nose
 , six
diff --git a/pkgs/development/python-modules/httmock/default.nix b/pkgs/development/python-modules/httmock/default.nix
index 117c7f5e132f..cbf6b95ccd36 100644
--- a/pkgs/development/python-modules/httmock/default.nix
+++ b/pkgs/development/python-modules/httmock/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, requests }:
+{ lib, buildPythonPackage, fetchFromGitHub, requests }:
 
 buildPythonPackage rec {
   pname   = "httmock";
diff --git a/pkgs/development/python-modules/http_signature/default.nix b/pkgs/development/python-modules/http_signature/default.nix
index 145eea751b9b..9169f1e41266 100644
--- a/pkgs/development/python-modules/http_signature/default.nix
+++ b/pkgs/development/python-modules/http_signature/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/httpauth/default.nix b/pkgs/development/python-modules/httpauth/default.nix
index b7867e22f175..a7d4240db143 100644
--- a/pkgs/development/python-modules/httpauth/default.nix
+++ b/pkgs/development/python-modules/httpauth/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/httpbin/default.nix b/pkgs/development/python-modules/httpbin/default.nix
index cbaf89c3ca61..2e711141fcba 100644
--- a/pkgs/development/python-modules/httpbin/default.nix
+++ b/pkgs/development/python-modules/httpbin/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , fetchpatch
diff --git a/pkgs/development/python-modules/humanize/default.nix b/pkgs/development/python-modules/humanize/default.nix
index 09e94f6275dd..b6f78e5cf8fd 100644
--- a/pkgs/development/python-modules/humanize/default.nix
+++ b/pkgs/development/python-modules/humanize/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/hyperframe/default.nix b/pkgs/development/python-modules/hyperframe/default.nix
index a74198f38321..6cdee9948b91 100644
--- a/pkgs/development/python-modules/hyperframe/default.nix
+++ b/pkgs/development/python-modules/hyperframe/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytestCheckHook }:
+{ lib, buildPythonPackage, fetchPypi, pytestCheckHook }:
 
 buildPythonPackage rec {
   pname = "hyperframe";
diff --git a/pkgs/development/python-modules/hyperopt/default.nix b/pkgs/development/python-modules/hyperopt/default.nix
index ba4aeef402ec..d407ff95a010 100644
--- a/pkgs/development/python-modules/hyperopt/default.nix
+++ b/pkgs/development/python-modules/hyperopt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage
+{ lib, fetchPypi, buildPythonPackage
 , cloudpickle, numpy, future, networkx
 , six, tqdm, scipy, pymongo
 }:
diff --git a/pkgs/development/python-modules/i3-py/default.nix b/pkgs/development/python-modules/i3-py/default.nix
index 4dea7526b7e7..312c1bb45c70 100644
--- a/pkgs/development/python-modules/i3-py/default.nix
+++ b/pkgs/development/python-modules/i3-py/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/i3ipc/default.nix b/pkgs/development/python-modules/i3ipc/default.nix
index c27d41354112..37d5ccd8786f 100644
--- a/pkgs/development/python-modules/i3ipc/default.nix
+++ b/pkgs/development/python-modules/i3ipc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub
+{ lib, buildPythonPackage, fetchFromGitHub
 , xorgserver, pytest, pytest-xvfb, i3, python, xlib, xdpyinfo
 , makeFontsConf, coreutils
 }:
diff --git a/pkgs/development/python-modules/icalendar/default.nix b/pkgs/development/python-modules/icalendar/default.nix
index 4499d5d62f4f..8e75a945d10c 100644
--- a/pkgs/development/python-modules/icalendar/default.nix
+++ b/pkgs/development/python-modules/icalendar/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , setuptools
diff --git a/pkgs/development/python-modules/ics/default.nix b/pkgs/development/python-modules/ics/default.nix
index c186020fee1e..011909d6b805 100644
--- a/pkgs/development/python-modules/ics/default.nix
+++ b/pkgs/development/python-modules/ics/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, pythonOlder
+{ lib, buildPythonPackage, fetchFromGitHub, pythonOlder
 , tatsu, arrow
 , pytestCheckHook, pytest-flakes
 }:
diff --git a/pkgs/development/python-modules/ifaddr/default.nix b/pkgs/development/python-modules/ifaddr/default.nix
index 47997dbdc265..35bafd67fa97 100644
--- a/pkgs/development/python-modules/ifaddr/default.nix
+++ b/pkgs/development/python-modules/ifaddr/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , ipaddress
diff --git a/pkgs/development/python-modules/ifconfig-parser/default.nix b/pkgs/development/python-modules/ifconfig-parser/default.nix
index bdfd3767f8c4..be4e2026bf10 100644
--- a/pkgs/development/python-modules/ifconfig-parser/default.nix
+++ b/pkgs/development/python-modules/ifconfig-parser/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub }:
+{ lib, buildPythonPackage, fetchFromGitHub }:
 
 buildPythonPackage rec {
   pname = "ifconfig-parser";
diff --git a/pkgs/development/python-modules/ijson/default.nix b/pkgs/development/python-modules/ijson/default.nix
index a82a20ca7c8a..8ccc7eb4e0c0 100644
--- a/pkgs/development/python-modules/ijson/default.nix
+++ b/pkgs/development/python-modules/ijson/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "ijson";
diff --git a/pkgs/development/python-modules/image-match/default.nix b/pkgs/development/python-modules/image-match/default.nix
index 5c1953d6ac3f..7464f3c89972 100644
--- a/pkgs/development/python-modules/image-match/default.nix
+++ b/pkgs/development/python-modules/image-match/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, pytestrunner, scikitimage }:
+{ lib, buildPythonPackage, fetchFromGitHub, pytestrunner, scikitimage }:
 
 buildPythonPackage {
   pname = "image-match";
diff --git a/pkgs/development/python-modules/imagecorruptions/default.nix b/pkgs/development/python-modules/imagecorruptions/default.nix
index 65c1cfd020a8..8d2b7fd8da88 100644
--- a/pkgs/development/python-modules/imagecorruptions/default.nix
+++ b/pkgs/development/python-modules/imagecorruptions/default.nix
@@ -2,7 +2,7 @@
 , fetchPypi
 , numpy
 , scikitimage
-, lib, stdenv
+, lib
 , opencv3
 }:
 
diff --git a/pkgs/development/python-modules/imageio/default.nix b/pkgs/development/python-modules/imageio/default.nix
index 71f7eae9c32f..67920dc7b7d8 100644
--- a/pkgs/development/python-modules/imageio/default.nix
+++ b/pkgs/development/python-modules/imageio/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , isPy27
 , pathlib
diff --git a/pkgs/development/python-modules/imagesize/default.nix b/pkgs/development/python-modules/imagesize/default.nix
index cd48f54ee8f4..42cf6b50764d 100644
--- a/pkgs/development/python-modules/imagesize/default.nix
+++ b/pkgs/development/python-modules/imagesize/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/imapclient/default.nix b/pkgs/development/python-modules/imapclient/default.nix
index c091f53b8d4f..27667f860ff1 100644
--- a/pkgs/development/python-modules/imapclient/default.nix
+++ b/pkgs/development/python-modules/imapclient/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , mock
diff --git a/pkgs/development/python-modules/imbalanced-learn/0.4.nix b/pkgs/development/python-modules/imbalanced-learn/0.4.nix
index fe21096d635d..96ba16b1cd1a 100644
--- a/pkgs/development/python-modules/imbalanced-learn/0.4.nix
+++ b/pkgs/development/python-modules/imbalanced-learn/0.4.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, scikitlearn, pandas, nose, pytest }:
+{ lib, buildPythonPackage, fetchPypi, scikitlearn, pandas, nose, pytest }:
 
 buildPythonPackage rec {
   pname = "imbalanced-learn";
diff --git a/pkgs/development/python-modules/imbalanced-learn/default.nix b/pkgs/development/python-modules/imbalanced-learn/default.nix
index 4253ed30e415..f5418b89e802 100644
--- a/pkgs/development/python-modules/imbalanced-learn/default.nix
+++ b/pkgs/development/python-modules/imbalanced-learn/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy27
+{ lib, buildPythonPackage, fetchPypi, isPy27
 , pandas
 , pytestCheckHook
 , scikitlearn
diff --git a/pkgs/development/python-modules/imgaug/default.nix b/pkgs/development/python-modules/imgaug/default.nix
index 9ca8531dbbce..343c7869a6c1 100644
--- a/pkgs/development/python-modules/imgaug/default.nix
+++ b/pkgs/development/python-modules/imgaug/default.nix
@@ -9,7 +9,7 @@
 , scipy
 , shapely
 , six
-, lib, stdenv
+, lib
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/imgsize/default.nix b/pkgs/development/python-modules/imgsize/default.nix
index d1a69c043d0f..a8f50cd8f326 100644
--- a/pkgs/development/python-modules/imgsize/default.nix
+++ b/pkgs/development/python-modules/imgsize/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 }:
diff --git a/pkgs/development/python-modules/importmagic/default.nix b/pkgs/development/python-modules/importmagic/default.nix
index 3a6a3c9ef8d7..54308d632b27 100644
--- a/pkgs/development/python-modules/importmagic/default.nix
+++ b/pkgs/development/python-modules/importmagic/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/imread/default.nix b/pkgs/development/python-modules/imread/default.nix
index 65ae47ed87b0..3d09e6a43971 100644
--- a/pkgs/development/python-modules/imread/default.nix
+++ b/pkgs/development/python-modules/imread/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/imutils/default.nix b/pkgs/development/python-modules/imutils/default.nix
index 33c2ae0001c2..f402f913f38c 100644
--- a/pkgs/development/python-modules/imutils/default.nix
+++ b/pkgs/development/python-modules/imutils/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , opencv3
diff --git a/pkgs/development/python-modules/influxdb/default.nix b/pkgs/development/python-modules/influxdb/default.nix
index 2d0fd5a93adb..69fe83b8779b 100644
--- a/pkgs/development/python-modules/influxdb/default.nix
+++ b/pkgs/development/python-modules/influxdb/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , requests
diff --git a/pkgs/development/python-modules/influxgraph/default.nix b/pkgs/development/python-modules/influxgraph/default.nix
index 32374453375d..c8403cf64463 100644
--- a/pkgs/development/python-modules/influxgraph/default.nix
+++ b/pkgs/development/python-modules/influxgraph/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k
+{ lib, buildPythonPackage, fetchPypi, isPy3k
 , influxdb, graphite_api, memcached
 }:
 
diff --git a/pkgs/development/python-modules/infoqscraper/default.nix b/pkgs/development/python-modules/infoqscraper/default.nix
index 4baa891a7790..b250dfc6c7f6 100644
--- a/pkgs/development/python-modules/infoqscraper/default.nix
+++ b/pkgs/development/python-modules/infoqscraper/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , html5lib
 , six
diff --git a/pkgs/development/python-modules/inifile/default.nix b/pkgs/development/python-modules/inifile/default.nix
index 9bd24a4d7889..c94c12ab0a8f 100644
--- a/pkgs/development/python-modules/inifile/default.nix
+++ b/pkgs/development/python-modules/inifile/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/iniparse/default.nix b/pkgs/development/python-modules/iniparse/default.nix
index c515b7865b15..e4473c0bd1c1 100644
--- a/pkgs/development/python-modules/iniparse/default.nix
+++ b/pkgs/development/python-modules/iniparse/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , python
diff --git a/pkgs/development/python-modules/inquirer/default.nix b/pkgs/development/python-modules/inquirer/default.nix
index c434a3f52bce..e55fd8f39d55 100644
--- a/pkgs/development/python-modules/inquirer/default.nix
+++ b/pkgs/development/python-modules/inquirer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, python-editor, readchar, blessed, pytest, pytestcov, pexpect, pytest-mock }:
+{ lib, buildPythonPackage, fetchFromGitHub, python-editor, readchar, blessed, pytest, pytestcov, pexpect, pytest-mock }:
 
 buildPythonPackage rec {
   pname = "inquirer";
diff --git a/pkgs/development/python-modules/interruptingcow/default.nix b/pkgs/development/python-modules/interruptingcow/default.nix
index b4e1dfaff181..62e021afdbbb 100644
--- a/pkgs/development/python-modules/interruptingcow/default.nix
+++ b/pkgs/development/python-modules/interruptingcow/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 buildPythonPackage rec {
   pname = "interruptingcow";
   version = "0.8";
diff --git a/pkgs/development/python-modules/intervaltree/default.nix b/pkgs/development/python-modules/intervaltree/default.nix
index 27a5fa3650e8..dca73a93e8f4 100644
--- a/pkgs/development/python-modules/intervaltree/default.nix
+++ b/pkgs/development/python-modules/intervaltree/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , python, pytest, sortedcontainers }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/ipaddr/default.nix b/pkgs/development/python-modules/ipaddr/default.nix
index 427681fedb86..b29ee9179287 100644
--- a/pkgs/development/python-modules/ipaddr/default.nix
+++ b/pkgs/development/python-modules/ipaddr/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/ipaddress/default.nix b/pkgs/development/python-modules/ipaddress/default.nix
index f2e479aff96e..06211470daa4 100644
--- a/pkgs/development/python-modules/ipaddress/default.nix
+++ b/pkgs/development/python-modules/ipaddress/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonAtLeast
diff --git a/pkgs/development/python-modules/ipdb/default.nix b/pkgs/development/python-modules/ipdb/default.nix
index b21907f75ff5..7b8c877371cd 100644
--- a/pkgs/development/python-modules/ipdb/default.nix
+++ b/pkgs/development/python-modules/ipdb/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , ipython
diff --git a/pkgs/development/python-modules/ipdbplugin/default.nix b/pkgs/development/python-modules/ipdbplugin/default.nix
index 057d82cbebc3..9788fd8a5440 100644
--- a/pkgs/development/python-modules/ipdbplugin/default.nix
+++ b/pkgs/development/python-modules/ipdbplugin/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/ipfsapi/default.nix b/pkgs/development/python-modules/ipfsapi/default.nix
index 3deb0c6cb80c..c97eafb6054c 100644
--- a/pkgs/development/python-modules/ipfsapi/default.nix
+++ b/pkgs/development/python-modules/ipfsapi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , isPy27
diff --git a/pkgs/development/python-modules/iptools/default.nix b/pkgs/development/python-modules/iptools/default.nix
index 431c05bb3881..3f2b854b6e7f 100644
--- a/pkgs/development/python-modules/iptools/default.nix
+++ b/pkgs/development/python-modules/iptools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/iso3166/default.nix b/pkgs/development/python-modules/iso3166/default.nix
index acf6d3c9331d..61ec91075b5a 100644
--- a/pkgs/development/python-modules/iso3166/default.nix
+++ b/pkgs/development/python-modules/iso3166/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonPackage, pytest }:
+{ lib, fetchFromGitHub, buildPythonPackage, pytest }:
 
 buildPythonPackage {
   pname = "iso3166";
diff --git a/pkgs/development/python-modules/isodate/default.nix b/pkgs/development/python-modules/isodate/default.nix
index d2098a83c95e..19a643d216ac 100644
--- a/pkgs/development/python-modules/isodate/default.nix
+++ b/pkgs/development/python-modules/isodate/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , python
diff --git a/pkgs/development/python-modules/itsdangerous/default.nix b/pkgs/development/python-modules/itsdangerous/default.nix
index e89786d4e18d..d1669a1ed5bf 100644
--- a/pkgs/development/python-modules/itsdangerous/default.nix
+++ b/pkgs/development/python-modules/itsdangerous/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/itypes/default.nix b/pkgs/development/python-modules/itypes/default.nix
index 417d1a20b3bf..1b6845472404 100644
--- a/pkgs/development/python-modules/itypes/default.nix
+++ b/pkgs/development/python-modules/itypes/default.nix
@@ -1,5 +1,5 @@
 {
-  lib, stdenv,
+  lib,
   fetchFromGitHub,
   buildPythonPackage,
   pytest,
diff --git a/pkgs/development/python-modules/j2cli/default.nix b/pkgs/development/python-modules/j2cli/default.nix
index 14cf18ae694f..d6efe84edfd6 100644
--- a/pkgs/development/python-modules/j2cli/default.nix
+++ b/pkgs/development/python-modules/j2cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , jinja2
diff --git a/pkgs/development/python-modules/jabberbot/default.nix b/pkgs/development/python-modules/jabberbot/default.nix
index 4c625d944859..d00ccd06c8d6 100644
--- a/pkgs/development/python-modules/jabberbot/default.nix
+++ b/pkgs/development/python-modules/jabberbot/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, isPy3k, fetchPypi, xmpppy }:
+{ lib, buildPythonPackage, isPy3k, fetchPypi, xmpppy }:
 
 buildPythonPackage rec {
   pname = "jabberbot";
diff --git a/pkgs/development/python-modules/jc/default.nix b/pkgs/development/python-modules/jc/default.nix
index 6f120fa6ea2e..b4590ed28d3f 100644
--- a/pkgs/development/python-modules/jc/default.nix
+++ b/pkgs/development/python-modules/jc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , ruamel_yaml
diff --git a/pkgs/development/python-modules/jdatetime/default.nix b/pkgs/development/python-modules/jdatetime/default.nix
index d4aa49c3ca3c..90f7c310faa8 100644
--- a/pkgs/development/python-modules/jdatetime/default.nix
+++ b/pkgs/development/python-modules/jdatetime/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, six }:
+{ lib, buildPythonPackage, fetchPypi, six }:
 
 buildPythonPackage rec {
   pname = "jdatetime";
diff --git a/pkgs/development/python-modules/jedi/default.nix b/pkgs/development/python-modules/jedi/default.nix
index 6e833a774604..305b9f6c6b6b 100644
--- a/pkgs/development/python-modules/jedi/default.nix
+++ b/pkgs/development/python-modules/jedi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, fetchPypi, pytest, glibcLocales, tox, pytestcov, parso }:
+{ lib, buildPythonPackage, fetchFromGitHub, fetchPypi, pytest, glibcLocales, tox, pytestcov, parso }:
 
 buildPythonPackage rec {
   pname = "jedi";
diff --git a/pkgs/development/python-modules/jinja2_pluralize/default.nix b/pkgs/development/python-modules/jinja2_pluralize/default.nix
index 0a6d0c365a04..db196403822a 100644
--- a/pkgs/development/python-modules/jinja2_pluralize/default.nix
+++ b/pkgs/development/python-modules/jinja2_pluralize/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, jinja2, inflect }:
+{ lib, buildPythonPackage, fetchPypi, jinja2, inflect }:
 
 buildPythonPackage rec {
   pname = "jinja2_pluralize";
diff --git a/pkgs/development/python-modules/jinja2_time/default.nix b/pkgs/development/python-modules/jinja2_time/default.nix
index 7887fe96f75e..4268413fd3f5 100644
--- a/pkgs/development/python-modules/jinja2_time/default.nix
+++ b/pkgs/development/python-modules/jinja2_time/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , arrow
diff --git a/pkgs/development/python-modules/jmespath/default.nix b/pkgs/development/python-modules/jmespath/default.nix
index 3b31700de0eb..3f74ae8d810e 100644
--- a/pkgs/development/python-modules/jmespath/default.nix
+++ b/pkgs/development/python-modules/jmespath/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , ply
diff --git a/pkgs/development/python-modules/jpylyzer/default.nix b/pkgs/development/python-modules/jpylyzer/default.nix
index c5c9cdf15056..6f9ceb96e3f5 100644
--- a/pkgs/development/python-modules/jpylyzer/default.nix
+++ b/pkgs/development/python-modules/jpylyzer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , buildPythonPackage
 , six
diff --git a/pkgs/development/python-modules/jsonfield/default.nix b/pkgs/development/python-modules/jsonfield/default.nix
index 07ee609d6534..6b7faf9a312d 100644
--- a/pkgs/development/python-modules/jsonfield/default.nix
+++ b/pkgs/development/python-modules/jsonfield/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, django, pytestCheckHook, pytest-django }:
+{ lib, fetchPypi, buildPythonPackage, django, pytestCheckHook, pytest-django }:
 
 buildPythonPackage rec {
   pname = "jsonfield";
diff --git a/pkgs/development/python-modules/jsonpath_rw/default.nix b/pkgs/development/python-modules/jsonpath_rw/default.nix
index 81a6eb3fb27b..d2b177c742ab 100644
--- a/pkgs/development/python-modules/jsonpath_rw/default.nix
+++ b/pkgs/development/python-modules/jsonpath_rw/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPyPy
diff --git a/pkgs/development/python-modules/jsonref/default.nix b/pkgs/development/python-modules/jsonref/default.nix
index b901d811a230..3154f63f3181 100644
--- a/pkgs/development/python-modules/jsonref/default.nix
+++ b/pkgs/development/python-modules/jsonref/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , pytest, mock }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/jsonrpc-async/default.nix b/pkgs/development/python-modules/jsonrpc-async/default.nix
index 0b77db5df4e6..00f0d748bbb0 100644
--- a/pkgs/development/python-modules/jsonrpc-async/default.nix
+++ b/pkgs/development/python-modules/jsonrpc-async/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , aiohttp, jsonrpc-base }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/jsonrpc-base/default.nix b/pkgs/development/python-modules/jsonrpc-base/default.nix
index cc4bd1b2f686..db47a2240fb6 100644
--- a/pkgs/development/python-modules/jsonrpc-base/default.nix
+++ b/pkgs/development/python-modules/jsonrpc-base/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "jsonrpc-base";
diff --git a/pkgs/development/python-modules/jsonrpc-websocket/default.nix b/pkgs/development/python-modules/jsonrpc-websocket/default.nix
index d14d382f013c..bf8960ad27d9 100644
--- a/pkgs/development/python-modules/jsonrpc-websocket/default.nix
+++ b/pkgs/development/python-modules/jsonrpc-websocket/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , aiohttp, jsonrpc-base, pep8
 , pytestCheckHook
 , pytest-asyncio
diff --git a/pkgs/development/python-modules/jsonwatch/default.nix b/pkgs/development/python-modules/jsonwatch/default.nix
index feced9442257..7b08572d2319 100644
--- a/pkgs/development/python-modules/jsonwatch/default.nix
+++ b/pkgs/development/python-modules/jsonwatch/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , six
diff --git a/pkgs/development/python-modules/jug/default.nix b/pkgs/development/python-modules/jug/default.nix
index eff6accaa024..7646c007818c 100644
--- a/pkgs/development/python-modules/jug/default.nix
+++ b/pkgs/development/python-modules/jug/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, fetchpatch
+{ lib, buildPythonPackage, fetchPypi, fetchpatch
 , nose, numpy
 , bottle, pyyaml, redis, six
 , zlib
diff --git a/pkgs/development/python-modules/junos-eznc/default.nix b/pkgs/development/python-modules/junos-eznc/default.nix
index d9234d836b0f..60ec37dbde97 100644
--- a/pkgs/development/python-modules/junos-eznc/default.nix
+++ b/pkgs/development/python-modules/junos-eznc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/jupyter-repo2docker/default.nix b/pkgs/development/python-modules/jupyter-repo2docker/default.nix
index f01605513cb6..5d8060d1944e 100644
--- a/pkgs/development/python-modules/jupyter-repo2docker/default.nix
+++ b/pkgs/development/python-modules/jupyter-repo2docker/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pythonAtLeast
+{ lib, buildPythonPackage, fetchPypi, pythonAtLeast
 , docker
 , escapism
 , jinja2
diff --git a/pkgs/development/python-modules/jupyter-telemetry/default.nix b/pkgs/development/python-modules/jupyter-telemetry/default.nix
index 0f0c0d346e6a..9dddd8ec5684 100644
--- a/pkgs/development/python-modules/jupyter-telemetry/default.nix
+++ b/pkgs/development/python-modules/jupyter-telemetry/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
diff --git a/pkgs/development/python-modules/jupyter/default.nix b/pkgs/development/python-modules/jupyter/default.nix
index 03d28bbf55d6..818623c2513b 100644
--- a/pkgs/development/python-modules/jupyter/default.nix
+++ b/pkgs/development/python-modules/jupyter/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , notebook
diff --git a/pkgs/development/python-modules/jupyterlab_server/default.nix b/pkgs/development/python-modules/jupyterlab_server/default.nix
index bfbd1cc89e08..3d9b5b9f831b 100644
--- a/pkgs/development/python-modules/jupyterlab_server/default.nix
+++ b/pkgs/development/python-modules/jupyterlab_server/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , notebook
diff --git a/pkgs/development/python-modules/kaa-base/default.nix b/pkgs/development/python-modules/kaa-base/default.nix
index 24a02f7f696a..5b789f5eda8c 100644
--- a/pkgs/development/python-modules/kaa-base/default.nix
+++ b/pkgs/development/python-modules/kaa-base/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPyPy
diff --git a/pkgs/development/python-modules/kaa-metadata/default.nix b/pkgs/development/python-modules/kaa-metadata/default.nix
index 5164004e8ea5..5a50d9e9c0a6 100644
--- a/pkgs/development/python-modules/kaa-metadata/default.nix
+++ b/pkgs/development/python-modules/kaa-metadata/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , kaa-base
diff --git a/pkgs/development/python-modules/kafka-python/default.nix b/pkgs/development/python-modules/kafka-python/default.nix
index b147b30c2ce3..d8f37f563d4a 100644
--- a/pkgs/development/python-modules/kafka-python/default.nix
+++ b/pkgs/development/python-modules/kafka-python/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest, six, mock }:
+{ lib, buildPythonPackage, fetchPypi, pytest, six, mock }:
 
 buildPythonPackage rec {
   version = "2.0.2";
diff --git a/pkgs/development/python-modules/kaitaistruct/default.nix b/pkgs/development/python-modules/kaitaistruct/default.nix
index 866042b6942c..1050ae88e430 100644
--- a/pkgs/development/python-modules/kaitaistruct/default.nix
+++ b/pkgs/development/python-modules/kaitaistruct/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "kaitaistruct";
diff --git a/pkgs/development/python-modules/kajiki/default.nix b/pkgs/development/python-modules/kajiki/default.nix
index 2a45404919c0..471ee4416b62 100644
--- a/pkgs/development/python-modules/kajiki/default.nix
+++ b/pkgs/development/python-modules/kajiki/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , Babel
diff --git a/pkgs/development/python-modules/kaptan/default.nix b/pkgs/development/python-modules/kaptan/default.nix
index dea22059f096..c5f00393839e 100644
--- a/pkgs/development/python-modules/kaptan/default.nix
+++ b/pkgs/development/python-modules/kaptan/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pyyaml
diff --git a/pkgs/development/python-modules/kazoo/default.nix b/pkgs/development/python-modules/kazoo/default.nix
index d8743776578e..31b65023371e 100644
--- a/pkgs/development/python-modules/kazoo/default.nix
+++ b/pkgs/development/python-modules/kazoo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/keep/default.nix b/pkgs/development/python-modules/keep/default.nix
index 22ae853c043c..5a70dcb4676d 100644
--- a/pkgs/development/python-modules/keep/default.nix
+++ b/pkgs/development/python-modules/keep/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , PyGithub
diff --git a/pkgs/development/python-modules/keepalive/default.nix b/pkgs/development/python-modules/keepalive/default.nix
index 7a488edf895d..b6daec6ca200 100644
--- a/pkgs/development/python-modules/keepalive/default.nix
+++ b/pkgs/development/python-modules/keepalive/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/keepkey/default.nix b/pkgs/development/python-modules/keepkey/default.nix
index 437a0193c61d..6b4568cd748d 100644
--- a/pkgs/development/python-modules/keepkey/default.nix
+++ b/pkgs/development/python-modules/keepkey/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonPackage, pytest
+{ lib, fetchFromGitHub, buildPythonPackage, pytest
 , ecdsa , mnemonic, protobuf, hidapi, trezor }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/keepkey_agent/default.nix b/pkgs/development/python-modules/keepkey_agent/default.nix
index b9189cf4e167..27ef7d8dbf48 100644
--- a/pkgs/development/python-modules/keepkey_agent/default.nix
+++ b/pkgs/development/python-modules/keepkey_agent/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , keepkey
diff --git a/pkgs/development/python-modules/keras/default.nix b/pkgs/development/python-modules/keras/default.nix
index 7274d3d17a69..e90dd1a806aa 100644
--- a/pkgs/development/python-modules/keras/default.nix
+++ b/pkgs/development/python-modules/keras/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , pytest, pytestcov, pytest_xdist
 , six, numpy, scipy, pyyaml, h5py
 , keras-applications, keras-preprocessing
diff --git a/pkgs/development/python-modules/kerberos/default.nix b/pkgs/development/python-modules/kerberos/default.nix
index 985339caed53..7a9ce3aab448 100644
--- a/pkgs/development/python-modules/kerberos/default.nix
+++ b/pkgs/development/python-modules/kerberos/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , kerberos
diff --git a/pkgs/development/python-modules/keyrings-alt/default.nix b/pkgs/development/python-modules/keyrings-alt/default.nix
index bc20ff4e3740..5b53d201a0b6 100644
--- a/pkgs/development/python-modules/keyrings-alt/default.nix
+++ b/pkgs/development/python-modules/keyrings-alt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pythonOlder, isPy27, six
+{ lib, buildPythonPackage, fetchPypi, pythonOlder, isPy27, six
 , pytest, backports_unittest-mock, keyring, setuptools_scm, toml
 }:
 
diff --git a/pkgs/development/python-modules/kitchen/default.nix b/pkgs/development/python-modules/kitchen/default.nix
index 1a14b974114e..0b6f41d2c199 100644
--- a/pkgs/development/python-modules/kitchen/default.nix
+++ b/pkgs/development/python-modules/kitchen/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 buildPythonPackage rec {
   pname = "kitchen";
   version = "1.2.6";
diff --git a/pkgs/development/python-modules/knack/default.nix b/pkgs/development/python-modules/knack/default.nix
index dd45e9672313..c08bdab4cf34 100644
--- a/pkgs/development/python-modules/knack/default.nix
+++ b/pkgs/development/python-modules/knack/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , buildPythonPackage
 , fetchPypi
 , argcomplete
diff --git a/pkgs/development/python-modules/korean-lunar-calendar/default.nix b/pkgs/development/python-modules/korean-lunar-calendar/default.nix
index 8ad94d955aec..a1b22a727ad8 100644
--- a/pkgs/development/python-modules/korean-lunar-calendar/default.nix
+++ b/pkgs/development/python-modules/korean-lunar-calendar/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/kubernetes/default.nix b/pkgs/development/python-modules/kubernetes/default.nix
index 172180781968..f2cb598a6c9b 100644
--- a/pkgs/development/python-modules/kubernetes/default.nix
+++ b/pkgs/development/python-modules/kubernetes/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pythonAtLeast,
+{ lib, buildPythonPackage, fetchPypi, pythonAtLeast,
   ipaddress, websocket_client, urllib3, pyyaml, requests_oauthlib, python-dateutil, google-auth, adal,
   isort, pytest, coverage, mock, sphinx, autopep8, pep8, codecov, recommonmark, nose }:
 
diff --git a/pkgs/development/python-modules/larch/default.nix b/pkgs/development/python-modules/larch/default.nix
index 7708bc0dbc02..630430b8270b 100644
--- a/pkgs/development/python-modules/larch/default.nix
+++ b/pkgs/development/python-modules/larch/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , sphinx
diff --git a/pkgs/development/python-modules/lasagne/default.nix b/pkgs/development/python-modules/lasagne/default.nix
index 5bddf5cbe6f2..5db149708ff3 100644
--- a/pkgs/development/python-modules/lasagne/default.nix
+++ b/pkgs/development/python-modules/lasagne/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , numpy
diff --git a/pkgs/development/python-modules/lazy-object-proxy/default.nix b/pkgs/development/python-modules/lazy-object-proxy/default.nix
index 63784b4005bb..82a784cfe3c6 100644
--- a/pkgs/development/python-modules/lazy-object-proxy/default.nix
+++ b/pkgs/development/python-modules/lazy-object-proxy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/lazy_import/default.nix b/pkgs/development/python-modules/lazy_import/default.nix
index 1bc52b3a65c8..60eba0577b03 100644
--- a/pkgs/development/python-modules/lazy_import/default.nix
+++ b/pkgs/development/python-modules/lazy_import/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , pytest
 , pytest_xdist
 , six }:
diff --git a/pkgs/development/python-modules/ldap3/default.nix b/pkgs/development/python-modules/ldap3/default.nix
index e1accc4d177e..71af0d294a2d 100644
--- a/pkgs/development/python-modules/ldap3/default.nix
+++ b/pkgs/development/python-modules/ldap3/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, pyasn1 }:
+{ lib, fetchPypi, buildPythonPackage, pyasn1 }:
 
 buildPythonPackage rec {
   pname = "ldap3";
diff --git a/pkgs/development/python-modules/le/default.nix b/pkgs/development/python-modules/le/default.nix
index 6415b255c716..d42527ae97a9 100644
--- a/pkgs/development/python-modules/le/default.nix
+++ b/pkgs/development/python-modules/le/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , isPy3k
diff --git a/pkgs/development/python-modules/leather/default.nix b/pkgs/development/python-modules/leather/default.nix
index 99c1f080a031..197e88e8e8b2 100644
--- a/pkgs/development/python-modules/leather/default.nix
+++ b/pkgs/development/python-modules/leather/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, six }:
+{ lib, fetchPypi, buildPythonPackage, six }:
 
 buildPythonPackage rec {
   pname = "leather";
diff --git a/pkgs/development/python-modules/ledger_agent/default.nix b/pkgs/development/python-modules/ledger_agent/default.nix
index 4fc935799c31..8a0ace126458 100644
--- a/pkgs/development/python-modules/ledger_agent/default.nix
+++ b/pkgs/development/python-modules/ledger_agent/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , ledgerblue
diff --git a/pkgs/development/python-modules/ledgerblue/default.nix b/pkgs/development/python-modules/ledgerblue/default.nix
index f853dfbf01f9..fe94753f1a62 100644
--- a/pkgs/development/python-modules/ledgerblue/default.nix
+++ b/pkgs/development/python-modules/ledgerblue/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, hidapi
+{ lib, fetchPypi, buildPythonPackage, hidapi
 , pycrypto, pillow, protobuf, future, ecpy, python-u2flib-host, pycryptodomex
 , websocket_client
 }:
diff --git a/pkgs/development/python-modules/libagent/default.nix b/pkgs/development/python-modules/libagent/default.nix
index debe88f2f6cc..47be977755cd 100644
--- a/pkgs/development/python-modules/libagent/default.nix
+++ b/pkgs/development/python-modules/libagent/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonPackage, ed25519, ecdsa , semver, mnemonic,
+{ lib, fetchFromGitHub, buildPythonPackage, ed25519, ecdsa , semver, mnemonic,
   unidecode, mock, pytest , backports-shutil-which, ConfigArgParse,
   python-daemon, pymsgbox }:
 
diff --git a/pkgs/development/python-modules/libais/default.nix b/pkgs/development/python-modules/libais/default.nix
index eb1ce861dd26..33710c6682dc 100644
--- a/pkgs/development/python-modules/libais/default.nix
+++ b/pkgs/development/python-modules/libais/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi,
+{ lib, buildPythonPackage, fetchPypi,
   six, pytest, pytestrunner, pytestcov, coverage
 }:
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/libarcus/default.nix b/pkgs/development/python-modules/libarcus/default.nix
index 5a5116de5478..6e5d8f771e8b 100644
--- a/pkgs/development/python-modules/libarcus/default.nix
+++ b/pkgs/development/python-modules/libarcus/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, python, fetchFromGitHub
+{ lib, buildPythonPackage, python, fetchFromGitHub
 , cmake, sip, protobuf, pythonOlder }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/libasyncns/default.nix b/pkgs/development/python-modules/libasyncns/default.nix
index fc45622a671d..38ca9b26360c 100644
--- a/pkgs/development/python-modules/libasyncns/default.nix
+++ b/pkgs/development/python-modules/libasyncns/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchurl
+{ lib, buildPythonPackage, fetchurl
 , libasyncns, pkg-config }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/libkeepass/default.nix b/pkgs/development/python-modules/libkeepass/default.nix
index cfc687e37c14..aa922db9c102 100644
--- a/pkgs/development/python-modules/libkeepass/default.nix
+++ b/pkgs/development/python-modules/libkeepass/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage
+{ lib, fetchPypi, buildPythonPackage
 , lxml, pycryptodome, colorama }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/liblarch/default.nix b/pkgs/development/python-modules/liblarch/default.nix
index b824dec172ed..5ff8d25d54b5 100644
--- a/pkgs/development/python-modules/liblarch/default.nix
+++ b/pkgs/development/python-modules/liblarch/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , buildPythonPackage
 , python
diff --git a/pkgs/development/python-modules/libmr/default.nix b/pkgs/development/python-modules/libmr/default.nix
index a0ef924e56e6..d775cc7b245b 100644
--- a/pkgs/development/python-modules/libmr/default.nix
+++ b/pkgs/development/python-modules/libmr/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, numpy, cython }:
+{ lib, buildPythonPackage, fetchPypi, numpy, cython }:
 
 buildPythonPackage rec {
   pname = "libmr";
diff --git a/pkgs/development/python-modules/librosa/default.nix b/pkgs/development/python-modules/librosa/default.nix
index 777eed4ddb33..ce8f2a73fa7f 100644
--- a/pkgs/development/python-modules/librosa/default.nix
+++ b/pkgs/development/python-modules/librosa/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , joblib
diff --git a/pkgs/development/python-modules/libsavitar/default.nix b/pkgs/development/python-modules/libsavitar/default.nix
index 559289987e6c..7ef22e3f6ee5 100644
--- a/pkgs/development/python-modules/libsavitar/default.nix
+++ b/pkgs/development/python-modules/libsavitar/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, python, pythonOlder, fetchFromGitHub, cmake, sip }:
+{ lib, buildPythonPackage, python, pythonOlder, fetchFromGitHub, cmake, sip }:
 
 buildPythonPackage rec {
   pname = "libsavitar";
diff --git a/pkgs/development/python-modules/libsoundtouch/default.nix b/pkgs/development/python-modules/libsoundtouch/default.nix
index 40f1b2f8e9ca..a4f98ffada81 100644
--- a/pkgs/development/python-modules/libsoundtouch/default.nix
+++ b/pkgs/development/python-modules/libsoundtouch/default.nix
@@ -1,6 +1,6 @@
 { buildPythonPackage
 , fetchFromGitHub
-, stdenv
+
 , lib
 , pythonOlder
 , requests
diff --git a/pkgs/development/python-modules/libthumbor/default.nix b/pkgs/development/python-modules/libthumbor/default.nix
index 72e62514a526..c3d8ec9526ff 100644
--- a/pkgs/development/python-modules/libthumbor/default.nix
+++ b/pkgs/development/python-modules/libthumbor/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , django
diff --git a/pkgs/development/python-modules/libtmux/default.nix b/pkgs/development/python-modules/libtmux/default.nix
index df9728eb334b..e019951f6ff1 100644
--- a/pkgs/development/python-modules/libtmux/default.nix
+++ b/pkgs/development/python-modules/libtmux/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, pytest }:
+{ lib, fetchPypi, buildPythonPackage, pytest }:
 
 buildPythonPackage rec {
   pname = "libtmux";
diff --git a/pkgs/development/python-modules/libversion/default.nix b/pkgs/development/python-modules/libversion/default.nix
index d54a176f6862..2edc9211d928 100644
--- a/pkgs/development/python-modules/libversion/default.nix
+++ b/pkgs/development/python-modules/libversion/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pkg-config, libversion, pythonOlder }:
+{ lib, buildPythonPackage, fetchPypi, pkg-config, libversion, pythonOlder }:
 
 buildPythonPackage rec {
   pname = "libversion";
diff --git a/pkgs/development/python-modules/libvirt/5.9.0.nix b/pkgs/development/python-modules/libvirt/5.9.0.nix
index 1134d4f1c57b..bfc6b711ab20 100644
--- a/pkgs/development/python-modules/libvirt/5.9.0.nix
+++ b/pkgs/development/python-modules/libvirt/5.9.0.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchgit, pkg-config, lxml, libvirt, nose }:
+{ lib, buildPythonPackage, fetchgit, pkg-config, lxml, libvirt, nose }:
 
 buildPythonPackage rec {
   pname = "libvirt";
diff --git a/pkgs/development/python-modules/libvirt/default.nix b/pkgs/development/python-modules/libvirt/default.nix
index d29cf5a7a85f..ee2d88b4c049 100644
--- a/pkgs/development/python-modules/libvirt/default.nix
+++ b/pkgs/development/python-modules/libvirt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitLab, pkg-config, lxml, libvirt, nose }:
+{ lib, buildPythonPackage, fetchFromGitLab, pkg-config, lxml, libvirt, nose }:
 
 buildPythonPackage rec {
   pname = "libvirt";
diff --git a/pkgs/development/python-modules/lightblue/default.nix b/pkgs/development/python-modules/lightblue/default.nix
index 3e85a3cfaa04..feb271812443 100644
--- a/pkgs/development/python-modules/lightblue/default.nix
+++ b/pkgs/development/python-modules/lightblue/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , pkgs
diff --git a/pkgs/development/python-modules/lightning/default.nix b/pkgs/development/python-modules/lightning/default.nix
index 782bd41413eb..f6d21f95dbfc 100644
--- a/pkgs/development/python-modules/lightning/default.nix
+++ b/pkgs/development/python-modules/lightning/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/limits/default.nix b/pkgs/development/python-modules/limits/default.nix
index e1cd31867de4..fc6982440d63 100644
--- a/pkgs/development/python-modules/limits/default.nix
+++ b/pkgs/development/python-modules/limits/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, six }:
+{ lib, fetchPypi, buildPythonPackage, six }:
 
 buildPythonPackage rec {
   pname = "limits";
diff --git a/pkgs/development/python-modules/limnoria/default.nix b/pkgs/development/python-modules/limnoria/default.nix
index c92e014e9898..ff7ac9fb3f99 100644
--- a/pkgs/development/python-modules/limnoria/default.nix
+++ b/pkgs/development/python-modules/limnoria/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/linecache2/default.nix b/pkgs/development/python-modules/linecache2/default.nix
index 3945ec5001cd..3c2238b0875d 100644
--- a/pkgs/development/python-modules/linecache2/default.nix
+++ b/pkgs/development/python-modules/linecache2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pbr
diff --git a/pkgs/development/python-modules/linode-api/default.nix b/pkgs/development/python-modules/linode-api/default.nix
index 61624a64d66a..7df182d94fed 100644
--- a/pkgs/development/python-modules/linode-api/default.nix
+++ b/pkgs/development/python-modules/linode-api/default.nix
@@ -1,4 +1,4 @@
-{ stdenv,
+{
   buildPythonPackage,
   fetchFromGitHub,
   pythonOlder,
diff --git a/pkgs/development/python-modules/linode/default.nix b/pkgs/development/python-modules/linode/default.nix
index 611b91bb9309..3433c0e5717c 100644
--- a/pkgs/development/python-modules/linode/default.nix
+++ b/pkgs/development/python-modules/linode/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , requests
diff --git a/pkgs/development/python-modules/livelossplot/default.nix b/pkgs/development/python-modules/livelossplot/default.nix
index bbf1b966bf1e..2951ab7a427b 100644
--- a/pkgs/development/python-modules/livelossplot/default.nix
+++ b/pkgs/development/python-modules/livelossplot/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , isPy27
diff --git a/pkgs/development/python-modules/livestreamer-curses/default.nix b/pkgs/development/python-modules/livestreamer-curses/default.nix
index d76eb736ac73..5f17a7006177 100644
--- a/pkgs/development/python-modules/livestreamer-curses/default.nix
+++ b/pkgs/development/python-modules/livestreamer-curses/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , isPyPy
diff --git a/pkgs/development/python-modules/livestreamer/default.nix b/pkgs/development/python-modules/livestreamer/default.nix
index 7ae9124bb82c..184a215c407a 100644
--- a/pkgs/development/python-modules/livestreamer/default.nix
+++ b/pkgs/development/python-modules/livestreamer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , pkgs
 , isPyPy
diff --git a/pkgs/development/python-modules/lmdb/default.nix b/pkgs/development/python-modules/lmdb/default.nix
index 20020b97ef23..f3e7a86a2aae 100644
--- a/pkgs/development/python-modules/lmdb/default.nix
+++ b/pkgs/development/python-modules/lmdb/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytestCheckHook
diff --git a/pkgs/development/python-modules/lmtpd/default.nix b/pkgs/development/python-modules/lmtpd/default.nix
index 3a1beba29d40..bb27c29173b1 100644
--- a/pkgs/development/python-modules/lmtpd/default.nix
+++ b/pkgs/development/python-modules/lmtpd/default.nix
@@ -1,4 +1,4 @@
-{ buildPythonPackage, fetchPypi, isPy3k, lib, stdenv }:
+{ buildPythonPackage, fetchPypi, isPy3k, lib }:
 
 buildPythonPackage rec {
   pname = "lmtpd";
diff --git a/pkgs/development/python-modules/localzone/default.nix b/pkgs/development/python-modules/localzone/default.nix
index 8690b1e4c91e..0960a824817a 100644
--- a/pkgs/development/python-modules/localzone/default.nix
+++ b/pkgs/development/python-modules/localzone/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , dnspython
diff --git a/pkgs/development/python-modules/locket/default.nix b/pkgs/development/python-modules/locket/default.nix
index 45985a17d3e9..e0be7d8f9440 100644
--- a/pkgs/development/python-modules/locket/default.nix
+++ b/pkgs/development/python-modules/locket/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest }:
+{ lib, buildPythonPackage, fetchPypi, pytest }:
 
 buildPythonPackage rec {
   pname = "locket";
diff --git a/pkgs/development/python-modules/logilab/common.nix b/pkgs/development/python-modules/logilab/common.nix
index b7ba746d79ee..a1cb1b248ae3 100644
--- a/pkgs/development/python-modules/logilab/common.nix
+++ b/pkgs/development/python-modules/logilab/common.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy27, unittest2, six }:
+{ lib, buildPythonPackage, fetchPypi, isPy27, unittest2, six }:
 
 buildPythonPackage rec {
   pname = "logilab-common";
diff --git a/pkgs/development/python-modules/logilab/constraint.nix b/pkgs/development/python-modules/logilab/constraint.nix
index 9a071b5cf5f9..bbc65a51c3c3 100644
--- a/pkgs/development/python-modules/logilab/constraint.nix
+++ b/pkgs/development/python-modules/logilab/constraint.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, logilab_common, six }:
+{ lib, buildPythonPackage, fetchPypi, logilab_common, six }:
 
 buildPythonPackage rec {
   pname = "logilab-constraint";
diff --git a/pkgs/development/python-modules/logilab_astng/default.nix b/pkgs/development/python-modules/logilab_astng/default.nix
index 15cea1d7baaa..dac5862324ab 100644
--- a/pkgs/development/python-modules/logilab_astng/default.nix
+++ b/pkgs/development/python-modules/logilab_astng/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , logilab_common
diff --git a/pkgs/development/python-modules/logutils/default.nix b/pkgs/development/python-modules/logutils/default.nix
index d49667d7cc8a..0a49262647e9 100644
--- a/pkgs/development/python-modules/logutils/default.nix
+++ b/pkgs/development/python-modules/logutils/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/lpod/default.nix b/pkgs/development/python-modules/lpod/default.nix
index 67b48cecd62c..9c719d234f89 100644
--- a/pkgs/development/python-modules/lpod/default.nix
+++ b/pkgs/development/python-modules/lpod/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , lxml
diff --git a/pkgs/development/python-modules/lsi/default.nix b/pkgs/development/python-modules/lsi/default.nix
index 0fca2f7b372f..b570a62d9e34 100644
--- a/pkgs/development/python-modules/lsi/default.nix
+++ b/pkgs/development/python-modules/lsi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , isPy3k
 , fetchPypi
diff --git a/pkgs/development/python-modules/lxc/default.nix b/pkgs/development/python-modules/lxc/default.nix
index a20db9dd5034..4534e0a01ef3 100644
--- a/pkgs/development/python-modules/lxc/default.nix
+++ b/pkgs/development/python-modules/lxc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , isPy3k
diff --git a/pkgs/development/python-modules/lyricwikia/default.nix b/pkgs/development/python-modules/lyricwikia/default.nix
index 585c38ab33ec..a5ea55c39cf5 100644
--- a/pkgs/development/python-modules/lyricwikia/default.nix
+++ b/pkgs/development/python-modules/lyricwikia/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, pytestrunner, six, beautifulsoup4, requests, }:
+{ lib, fetchPypi, buildPythonPackage, pytestrunner, six, beautifulsoup4, requests, }:
 buildPythonPackage rec {
   pname = "lyricwikia";
   version = "0.1.11";
diff --git a/pkgs/development/python-modules/m2crypto/default.nix b/pkgs/development/python-modules/m2crypto/default.nix
index af07be47dcdc..8e214540b12d 100644
--- a/pkgs/development/python-modules/m2crypto/default.nix
+++ b/pkgs/development/python-modules/m2crypto/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , fetchpatch
 , buildPythonPackage
 , fetchPypi
diff --git a/pkgs/development/python-modules/m2r/default.nix b/pkgs/development/python-modules/m2r/default.nix
index 149e4d6ed562..35331c14b08a 100644
--- a/pkgs/development/python-modules/m2r/default.nix
+++ b/pkgs/development/python-modules/m2r/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi,
+{ lib, buildPythonPackage, fetchPypi,
   mistune, docutils } :
 buildPythonPackage rec {
   pname = "m2r";
diff --git a/pkgs/development/python-modules/magic-wormhole-mailbox-server/default.nix b/pkgs/development/python-modules/magic-wormhole-mailbox-server/default.nix
index 14ae268c03a0..dfd16c04a6f8 100644
--- a/pkgs/development/python-modules/magic-wormhole-mailbox-server/default.nix
+++ b/pkgs/development/python-modules/magic-wormhole-mailbox-server/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy27, six, attrs, twisted, pyopenssl, service-identity, autobahn, treq, mock, pytest }:
+{ lib, buildPythonPackage, fetchPypi, isPy27, six, attrs, twisted, pyopenssl, service-identity, autobahn, treq, mock, pytest }:
 
 buildPythonPackage rec {
   version = "0.4.1";
diff --git a/pkgs/development/python-modules/mailcap-fix/default.nix b/pkgs/development/python-modules/mailcap-fix/default.nix
index 08991edce4aa..da735d9d048d 100644
--- a/pkgs/development/python-modules/mailcap-fix/default.nix
+++ b/pkgs/development/python-modules/mailcap-fix/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy36
diff --git a/pkgs/development/python-modules/mailchimp/default.nix b/pkgs/development/python-modules/mailchimp/default.nix
index 0032caa7a0a5..91563b7fe7ef 100644
--- a/pkgs/development/python-modules/mailchimp/default.nix
+++ b/pkgs/development/python-modules/mailchimp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , docopt
diff --git a/pkgs/development/python-modules/mailman-hyperkitty/default.nix b/pkgs/development/python-modules/mailman-hyperkitty/default.nix
index 8ab80e337179..1d3b69f6bf24 100644
--- a/pkgs/development/python-modules/mailman-hyperkitty/default.nix
+++ b/pkgs/development/python-modules/mailman-hyperkitty/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, mailman, mock }:
+{ lib, buildPythonPackage, fetchPypi, mailman, mock }:
 
 buildPythonPackage rec {
   pname = "mailman-hyperkitty";
diff --git a/pkgs/development/python-modules/mailman-rss/default.nix b/pkgs/development/python-modules/mailman-rss/default.nix
index 84c97eb16e2e..e2043b0d6d4d 100644
--- a/pkgs/development/python-modules/mailman-rss/default.nix
+++ b/pkgs/development/python-modules/mailman-rss/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, withTwitter ? false}:
+{ lib, python3Packages, withTwitter ? false}:
 
 python3Packages.buildPythonApplication rec {
   pname = "mailman-rss";
diff --git a/pkgs/development/python-modules/mailmanclient/default.nix b/pkgs/development/python-modules/mailmanclient/default.nix
index 280ee95b8301..edc19f66f71b 100644
--- a/pkgs/development/python-modules/mailmanclient/default.nix
+++ b/pkgs/development/python-modules/mailmanclient/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k, six, httplib2, requests }:
+{ lib, buildPythonPackage, fetchPypi, isPy3k, six, httplib2, requests }:
 
 buildPythonPackage rec {
   pname = "mailmanclient";
diff --git a/pkgs/development/python-modules/manuel/default.nix b/pkgs/development/python-modules/manuel/default.nix
index 59243783ecf9..2f14ed863c3e 100644
--- a/pkgs/development/python-modules/manuel/default.nix
+++ b/pkgs/development/python-modules/manuel/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/mapsplotlib/default.nix b/pkgs/development/python-modules/mapsplotlib/default.nix
index 54d0ade40f35..28a6e9c0c5c4 100644
--- a/pkgs/development/python-modules/mapsplotlib/default.nix
+++ b/pkgs/development/python-modules/mapsplotlib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , isPy3k
 , fetchPypi
diff --git a/pkgs/development/python-modules/marionette-harness/mozinfo.nix b/pkgs/development/python-modules/marionette-harness/mozinfo.nix
index b7d91cc16f52..99f3afc31f61 100644
--- a/pkgs/development/python-modules/marionette-harness/mozinfo.nix
+++ b/pkgs/development/python-modules/marionette-harness/mozinfo.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/marisa/default.nix b/pkgs/development/python-modules/marisa/default.nix
index a30f7062df0a..93a4ccb959f7 100644
--- a/pkgs/development/python-modules/marisa/default.nix
+++ b/pkgs/development/python-modules/marisa/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, marisa, swig
+{ lib, buildPythonPackage, fetchFromGitHub, marisa, swig
 , isPy3k
 }:
 
diff --git a/pkgs/development/python-modules/markdown-macros/default.nix b/pkgs/development/python-modules/markdown-macros/default.nix
index e248bfe60cc4..e95cbe3c4c10 100644
--- a/pkgs/development/python-modules/markdown-macros/default.nix
+++ b/pkgs/development/python-modules/markdown-macros/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , fetchpatch
diff --git a/pkgs/development/python-modules/markdown2/default.nix b/pkgs/development/python-modules/markdown2/default.nix
index 2f929012df89..b1513d06e58b 100644
--- a/pkgs/development/python-modules/markdown2/default.nix
+++ b/pkgs/development/python-modules/markdown2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "markdown2";
diff --git a/pkgs/development/python-modules/markerlib/default.nix b/pkgs/development/python-modules/markerlib/default.nix
index d039198b3938..7762a970fb1e 100644
--- a/pkgs/development/python-modules/markerlib/default.nix
+++ b/pkgs/development/python-modules/markerlib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , setuptools
diff --git a/pkgs/development/python-modules/markupsafe/default.nix b/pkgs/development/python-modules/markupsafe/default.nix
index 6a6e06cd3177..ae0878c7a972 100644
--- a/pkgs/development/python-modules/markupsafe/default.nix
+++ b/pkgs/development/python-modules/markupsafe/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/matrix-client/default.nix b/pkgs/development/python-modules/matrix-client/default.nix
index 34c99a1ebe1c..b8439a0c23d4 100644
--- a/pkgs/development/python-modules/matrix-client/default.nix
+++ b/pkgs/development/python-modules/matrix-client/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , requests
diff --git a/pkgs/development/python-modules/maya/default.nix b/pkgs/development/python-modules/maya/default.nix
index 9cd1019a0301..4a751a188c24 100644
--- a/pkgs/development/python-modules/maya/default.nix
+++ b/pkgs/development/python-modules/maya/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, fetchpatch, buildPythonPackage
+{ lib, fetchPypi, fetchpatch, buildPythonPackage
 , dateparser, humanize, pendulum, ruamel_yaml, tzlocal }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/mccabe/default.nix b/pkgs/development/python-modules/mccabe/default.nix
index 2886a436a00d..03343aec16e8 100644
--- a/pkgs/development/python-modules/mccabe/default.nix
+++ b/pkgs/development/python-modules/mccabe/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest, pytestrunner }:
+{ lib, buildPythonPackage, fetchPypi, pytest, pytestrunner }:
 
 buildPythonPackage rec {
   pname = "mccabe";
diff --git a/pkgs/development/python-modules/mdp/default.nix b/pkgs/development/python-modules/mdp/default.nix
index 5313cd8e89aa..55a440e68089 100644
--- a/pkgs/development/python-modules/mdp/default.nix
+++ b/pkgs/development/python-modules/mdp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest, future, numpy }:
+{ lib, buildPythonPackage, fetchPypi, pytest, future, numpy }:
 
 buildPythonPackage rec {
   pname = "MDP";
diff --git a/pkgs/development/python-modules/mechanize/default.nix b/pkgs/development/python-modules/mechanize/default.nix
index e2d2269a43c0..7eb119fa9559 100644
--- a/pkgs/development/python-modules/mechanize/default.nix
+++ b/pkgs/development/python-modules/mechanize/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , html5lib
diff --git a/pkgs/development/python-modules/meinheld/default.nix b/pkgs/development/python-modules/meinheld/default.nix
index ce7f23168007..9cf02e4c8867 100644
--- a/pkgs/development/python-modules/meinheld/default.nix
+++ b/pkgs/development/python-modules/meinheld/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, greenlet }:
+{ lib, fetchPypi, buildPythonPackage, greenlet }:
 
 buildPythonPackage rec {
   pname = "meinheld";
diff --git a/pkgs/development/python-modules/meld3/default.nix b/pkgs/development/python-modules/meld3/default.nix
index 8871bfdda463..a751dbeac3fc 100644
--- a/pkgs/development/python-modules/meld3/default.nix
+++ b/pkgs/development/python-modules/meld3/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/meliae/default.nix b/pkgs/development/python-modules/meliae/default.nix
index d602e3d94fdc..4c6aa746448e 100644
--- a/pkgs/development/python-modules/meliae/default.nix
+++ b/pkgs/development/python-modules/meliae/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , cython
diff --git a/pkgs/development/python-modules/memcached/default.nix b/pkgs/development/python-modules/memcached/default.nix
index b75bd31361de..02f4bc3aa44b 100644
--- a/pkgs/development/python-modules/memcached/default.nix
+++ b/pkgs/development/python-modules/memcached/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , fetchPypi
diff --git a/pkgs/development/python-modules/memory_profiler/default.nix b/pkgs/development/python-modules/memory_profiler/default.nix
index 28ff6b7c5e31..994863dbbc06 100644
--- a/pkgs/development/python-modules/memory_profiler/default.nix
+++ b/pkgs/development/python-modules/memory_profiler/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , python
 }:
 
diff --git a/pkgs/development/python-modules/mergedeep/default.nix b/pkgs/development/python-modules/mergedeep/default.nix
index bcbca3475485..cdd19beb68d9 100644
--- a/pkgs/development/python-modules/mergedeep/default.nix
+++ b/pkgs/development/python-modules/mergedeep/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, isPy27, fetchFromGitHub, pytest }:
+{ lib, buildPythonPackage, isPy27, fetchFromGitHub, pytest }:
 
 buildPythonPackage rec {
   pname = "mergedeep";
diff --git a/pkgs/development/python-modules/mesa/default.nix b/pkgs/development/python-modules/mesa/default.nix
index 5b97f972dad1..aaf13a76530d 100644
--- a/pkgs/development/python-modules/mesa/default.nix
+++ b/pkgs/development/python-modules/mesa/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, isPy27
+{ lib, buildPythonPackage, fetchFromGitHub, isPy27
 , cookiecutter, networkx , pandas, tornado, tqdm
 , pytest }:
 
diff --git a/pkgs/development/python-modules/metaphone/default.nix b/pkgs/development/python-modules/metaphone/default.nix
index 1c8557f15c41..d6b0c30c504c 100644
--- a/pkgs/development/python-modules/metaphone/default.nix
+++ b/pkgs/development/python-modules/metaphone/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, isPy3k, fetchPypi, nose }:
+{ lib, buildPythonPackage, isPy3k, fetchPypi, nose }:
 
 buildPythonPackage rec {
   pname = "metaphone";
diff --git a/pkgs/development/python-modules/mezzanine/default.nix b/pkgs/development/python-modules/mezzanine/default.nix
index 86deecb5d4f2..c157cd2a6be8 100644
--- a/pkgs/development/python-modules/mezzanine/default.nix
+++ b/pkgs/development/python-modules/mezzanine/default.nix
@@ -1,5 +1,5 @@
 { lib
-, stdenv
+
 , buildPythonPackage
 , fetchPypi
 , isPyPy
diff --git a/pkgs/development/python-modules/micawber/default.nix b/pkgs/development/python-modules/micawber/default.nix
index 9d31dd378ac4..73f50d32a5f4 100644
--- a/pkgs/development/python-modules/micawber/default.nix
+++ b/pkgs/development/python-modules/micawber/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, beautifulsoup4 }:
+{ lib, buildPythonPackage, fetchPypi, beautifulsoup4 }:
 
 buildPythonPackage rec {
   pname = "micawber";
diff --git a/pkgs/development/python-modules/midiutil/default.nix b/pkgs/development/python-modules/midiutil/default.nix
index 5ac8d917d75d..d1cae8c78041 100644
--- a/pkgs/development/python-modules/midiutil/default.nix
+++ b/pkgs/development/python-modules/midiutil/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "MIDIUtil";
diff --git a/pkgs/development/python-modules/milc/default.nix b/pkgs/development/python-modules/milc/default.nix
index dc824d565474..998f0a58b2ba 100644
--- a/pkgs/development/python-modules/milc/default.nix
+++ b/pkgs/development/python-modules/milc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , appdirs
diff --git a/pkgs/development/python-modules/minimock/default.nix b/pkgs/development/python-modules/minimock/default.nix
index f154eabb744c..faa836b71d7b 100644
--- a/pkgs/development/python-modules/minimock/default.nix
+++ b/pkgs/development/python-modules/minimock/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , nose
diff --git a/pkgs/development/python-modules/miniupnpc/default.nix b/pkgs/development/python-modules/miniupnpc/default.nix
index 7178405ab74c..fe7a9f69691a 100644
--- a/pkgs/development/python-modules/miniupnpc/default.nix
+++ b/pkgs/development/python-modules/miniupnpc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "miniupnpc";
diff --git a/pkgs/development/python-modules/mlflow/default.nix b/pkgs/development/python-modules/mlflow/default.nix
index 89cc8f991466..5ffde397337c 100644
--- a/pkgs/development/python-modules/mlflow/default.nix
+++ b/pkgs/development/python-modules/mlflow/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy27
+{ lib, buildPythonPackage, fetchPypi, isPy27
 , alembic
 , click
 , cloudpickle
diff --git a/pkgs/development/python-modules/mlrose/default.nix b/pkgs/development/python-modules/mlrose/default.nix
index c3c7c55f292d..40e3b6ce0953 100644
--- a/pkgs/development/python-modules/mlrose/default.nix
+++ b/pkgs/development/python-modules/mlrose/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, isPy27, buildPythonPackage, fetchPypi, scikitlearn }:
+{ lib, isPy27, buildPythonPackage, fetchPypi, scikitlearn }:
 
 buildPythonPackage rec {
   pname = "mlrose";
diff --git a/pkgs/development/python-modules/mlxtend/default.nix b/pkgs/development/python-modules/mlxtend/default.nix
index 94af156d9afb..35f55bb27930 100644
--- a/pkgs/development/python-modules/mlxtend/default.nix
+++ b/pkgs/development/python-modules/mlxtend/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , isPy27
diff --git a/pkgs/development/python-modules/mmpython/default.nix b/pkgs/development/python-modules/mmpython/default.nix
index e40fc197a5bf..64c270ca0722 100644
--- a/pkgs/development/python-modules/mmpython/default.nix
+++ b/pkgs/development/python-modules/mmpython/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , isPyPy
diff --git a/pkgs/development/python-modules/mockito/default.nix b/pkgs/development/python-modules/mockito/default.nix
index d7ca86b8ea30..69cdf7b56b09 100644
--- a/pkgs/development/python-modules/mockito/default.nix
+++ b/pkgs/development/python-modules/mockito/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k, funcsigs, pytest, numpy }:
+{ lib, buildPythonPackage, fetchPypi, isPy3k, funcsigs, pytest, numpy }:
 
 buildPythonPackage rec {
   version = "1.2.2";
diff --git a/pkgs/development/python-modules/modestmaps/default.nix b/pkgs/development/python-modules/modestmaps/default.nix
index a7862ef5c678..202589b7435c 100644
--- a/pkgs/development/python-modules/modestmaps/default.nix
+++ b/pkgs/development/python-modules/modestmaps/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pillow
diff --git a/pkgs/development/python-modules/mongodict/default.nix b/pkgs/development/python-modules/mongodict/default.nix
index 467093e84ceb..c2fbd6a7ad1b 100644
--- a/pkgs/development/python-modules/mongodict/default.nix
+++ b/pkgs/development/python-modules/mongodict/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pymongo
diff --git a/pkgs/development/python-modules/moretools/default.nix b/pkgs/development/python-modules/moretools/default.nix
index d39f67a73113..5a96682accdb 100644
--- a/pkgs/development/python-modules/moretools/default.nix
+++ b/pkgs/development/python-modules/moretools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , six, pathpy, zetup, pytest
 , decorator }:
 
diff --git a/pkgs/development/python-modules/moviepy/default.nix b/pkgs/development/python-modules/moviepy/default.nix
index 8bc984a52879..4cd1fec3d8b2 100644
--- a/pkgs/development/python-modules/moviepy/default.nix
+++ b/pkgs/development/python-modules/moviepy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonAtLeast
diff --git a/pkgs/development/python-modules/mox/default.nix b/pkgs/development/python-modules/mox/default.nix
index 94d4791224df..380dbe594a5a 100644
--- a/pkgs/development/python-modules/mox/default.nix
+++ b/pkgs/development/python-modules/mox/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 }:
diff --git a/pkgs/development/python-modules/mox3/default.nix b/pkgs/development/python-modules/mox3/default.nix
index 77a02ae8a733..1883c9c8c011 100644
--- a/pkgs/development/python-modules/mox3/default.nix
+++ b/pkgs/development/python-modules/mox3/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
diff --git a/pkgs/development/python-modules/mozsvc/default.nix b/pkgs/development/python-modules/mozsvc/default.nix
index 55afb1773fe3..0caa347edacf 100644
--- a/pkgs/development/python-modules/mozsvc/default.nix
+++ b/pkgs/development/python-modules/mozsvc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , pyramid
diff --git a/pkgs/development/python-modules/mpd/default.nix b/pkgs/development/python-modules/mpd/default.nix
index 212e6b5f13c4..b535144fac91 100644
--- a/pkgs/development/python-modules/mpd/default.nix
+++ b/pkgs/development/python-modules/mpd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/mpd2/default.nix b/pkgs/development/python-modules/mpd2/default.nix
index 7fdf64c0e4b7..031f26c49972 100644
--- a/pkgs/development/python-modules/mpd2/default.nix
+++ b/pkgs/development/python-modules/mpd2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
diff --git a/pkgs/development/python-modules/mpmath/default.nix b/pkgs/development/python-modules/mpmath/default.nix
index 86d55b34f044..3569f6239f0f 100644
--- a/pkgs/development/python-modules/mpmath/default.nix
+++ b/pkgs/development/python-modules/mpmath/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/mrbob/default.nix b/pkgs/development/python-modules/mrbob/default.nix
index 64d0ce13a86d..8921719a3ae2 100644
--- a/pkgs/development/python-modules/mrbob/default.nix
+++ b/pkgs/development/python-modules/mrbob/default.nix
@@ -1,4 +1,4 @@
-{ buildPythonPackage, lib, stdenv, glibcLocales, mock, nose, isPy3k, jinja2, six
+{ buildPythonPackage, lib, glibcLocales, mock, nose, isPy3k, jinja2, six
 , fetchPypi
 }:
 
diff --git a/pkgs/development/python-modules/msgpack-numpy/default.nix b/pkgs/development/python-modules/msgpack-numpy/default.nix
index 56bfa06a628a..8b50e04d4289 100644
--- a/pkgs/development/python-modules/msgpack-numpy/default.nix
+++ b/pkgs/development/python-modules/msgpack-numpy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , cython
diff --git a/pkgs/development/python-modules/msrplib/default.nix b/pkgs/development/python-modules/msrplib/default.nix
index 16c4cc0f43ae..e615b3e34e2c 100644
--- a/pkgs/development/python-modules/msrplib/default.nix
+++ b/pkgs/development/python-modules/msrplib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchdarcs
 , eventlib
diff --git a/pkgs/development/python-modules/multi_key_dict/default.nix b/pkgs/development/python-modules/multi_key_dict/default.nix
index f76cde9bec53..cb539e4dd90f 100644
--- a/pkgs/development/python-modules/multi_key_dict/default.nix
+++ b/pkgs/development/python-modules/multi_key_dict/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/munch/default.nix b/pkgs/development/python-modules/munch/default.nix
index 2ff2ce4cefb9..f6ca7c1d6905 100644
--- a/pkgs/development/python-modules/munch/default.nix
+++ b/pkgs/development/python-modules/munch/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/munkres/default.nix b/pkgs/development/python-modules/munkres/default.nix
index cb88b666cfa0..ffb4f8774906 100644
--- a/pkgs/development/python-modules/munkres/default.nix
+++ b/pkgs/development/python-modules/munkres/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , fetchpatch
diff --git a/pkgs/development/python-modules/murmurhash/default.nix b/pkgs/development/python-modules/murmurhash/default.nix
index 68aa29a6edeb..c2a7eb193377 100644
--- a/pkgs/development/python-modules/murmurhash/default.nix
+++ b/pkgs/development/python-modules/murmurhash/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , cython
diff --git a/pkgs/development/python-modules/musicbrainzngs/default.nix b/pkgs/development/python-modules/musicbrainzngs/default.nix
index 02ec38157117..e5f5eff6b284 100644
--- a/pkgs/development/python-modules/musicbrainzngs/default.nix
+++ b/pkgs/development/python-modules/musicbrainzngs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pkgs
diff --git a/pkgs/development/python-modules/mutag/default.nix b/pkgs/development/python-modules/mutag/default.nix
index 45725c0fabb7..ee190008f592 100644
--- a/pkgs/development/python-modules/mutag/default.nix
+++ b/pkgs/development/python-modules/mutag/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchgit
 , isPy3k
diff --git a/pkgs/development/python-modules/muttils/default.nix b/pkgs/development/python-modules/muttils/default.nix
index 1d6b5ce8df44..98f96d132123 100644
--- a/pkgs/development/python-modules/muttils/default.nix
+++ b/pkgs/development/python-modules/muttils/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , isPy3k
diff --git a/pkgs/development/python-modules/mwclient/default.nix b/pkgs/development/python-modules/mwclient/default.nix
index ac9373b574ac..2eed1eefeec8 100644
--- a/pkgs/development/python-modules/mwclient/default.nix
+++ b/pkgs/development/python-modules/mwclient/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub
+{ lib, buildPythonPackage, fetchFromGitHub
 , requests, requests_oauthlib, six
 , pytest, pytestcache, pytestcov, responses, mock
 }:
diff --git a/pkgs/development/python-modules/mwlib-ext/default.nix b/pkgs/development/python-modules/mwlib-ext/default.nix
index 0a81fd58d7ee..b9b18eaf9e5f 100644
--- a/pkgs/development/python-modules/mwlib-ext/default.nix
+++ b/pkgs/development/python-modules/mwlib-ext/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/mwlib-rl/default.nix b/pkgs/development/python-modules/mwlib-rl/default.nix
index d27de2ed45cc..fdb70726eb6e 100644
--- a/pkgs/development/python-modules/mwlib-rl/default.nix
+++ b/pkgs/development/python-modules/mwlib-rl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , mwlib
diff --git a/pkgs/development/python-modules/mwlib/default.nix b/pkgs/development/python-modules/mwlib/default.nix
index e9defe3ee148..d9edb2ef3ba5 100644
--- a/pkgs/development/python-modules/mwlib/default.nix
+++ b/pkgs/development/python-modules/mwlib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/mwparserfromhell/default.nix b/pkgs/development/python-modules/mwparserfromhell/default.nix
index 0546688b867e..56aa46615162 100644
--- a/pkgs/development/python-modules/mwparserfromhell/default.nix
+++ b/pkgs/development/python-modules/mwparserfromhell/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/mypy-protobuf/default.nix b/pkgs/development/python-modules/mypy-protobuf/default.nix
index f444ba039c20..69178edb6919 100644
--- a/pkgs/development/python-modules/mypy-protobuf/default.nix
+++ b/pkgs/development/python-modules/mypy-protobuf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonApplication, protobuf }:
+{ lib, fetchPypi, buildPythonApplication, protobuf }:
 
 buildPythonApplication rec {
   pname = "mypy-protobuf";
diff --git a/pkgs/development/python-modules/mypy/extensions.nix b/pkgs/development/python-modules/mypy/extensions.nix
index 21a3ee21dbd9..5992a6815d8e 100644
--- a/pkgs/development/python-modules/mypy/extensions.nix
+++ b/pkgs/development/python-modules/mypy/extensions.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, typing, pythonOlder }:
+{ lib, fetchPypi, buildPythonPackage, typing, pythonOlder }:
 
 buildPythonPackage rec {
   pname = "mypy-extensions";
diff --git a/pkgs/development/python-modules/mysqlclient/default.nix b/pkgs/development/python-modules/mysqlclient/default.nix
index 9d91543b7ff3..b7a0f39990ea 100644
--- a/pkgs/development/python-modules/mysqlclient/default.nix
+++ b/pkgs/development/python-modules/mysqlclient/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, libmysqlclient }:
+{ lib, buildPythonPackage, fetchPypi, libmysqlclient }:
 
 buildPythonPackage rec {
   pname = "mysqlclient";
diff --git a/pkgs/development/python-modules/namebench/default.nix b/pkgs/development/python-modules/namebench/default.nix
index eefdcce79901..b7b542b8a7a9 100644
--- a/pkgs/development/python-modules/namebench/default.nix
+++ b/pkgs/development/python-modules/namebench/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , isPy3k
 , isPyPy
diff --git a/pkgs/development/python-modules/nameparser/default.nix b/pkgs/development/python-modules/nameparser/default.nix
index 0c8e442affcf..0d7b53f03cbe 100644
--- a/pkgs/development/python-modules/nameparser/default.nix
+++ b/pkgs/development/python-modules/nameparser/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , glibcLocales
diff --git a/pkgs/development/python-modules/nanoleaf/default.nix b/pkgs/development/python-modules/nanoleaf/default.nix
index f6131cd53095..8712c582bedc 100644
--- a/pkgs/development/python-modules/nanoleaf/default.nix
+++ b/pkgs/development/python-modules/nanoleaf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, requests }:
+{ lib, buildPythonPackage, fetchPypi, requests }:
 
 buildPythonPackage rec {
   pname = "nanoleaf";
diff --git a/pkgs/development/python-modules/nanomsg-python/default.nix b/pkgs/development/python-modules/nanomsg-python/default.nix
index 4cf33fb2074c..765941457d4a 100644
--- a/pkgs/development/python-modules/nanomsg-python/default.nix
+++ b/pkgs/development/python-modules/nanomsg-python/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, nanomsg }:
+{ lib, buildPythonPackage, fetchFromGitHub, nanomsg }:
 
 buildPythonPackage {
   pname = "nanomsg-python";
diff --git a/pkgs/development/python-modules/nbclient/default.nix b/pkgs/development/python-modules/nbclient/default.nix
index d846511eb3f4..c320415e0754 100644
--- a/pkgs/development/python-modules/nbclient/default.nix
+++ b/pkgs/development/python-modules/nbclient/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pythonOlder,
+{ lib, buildPythonPackage, fetchPypi, pythonOlder,
   async_generator, traitlets, nbformat, nest-asyncio, jupyter_client,
   pytest, xmltodict, nbconvert, ipywidgets
 , doCheck ? true
diff --git a/pkgs/development/python-modules/nbxmpp/default.nix b/pkgs/development/python-modules/nbxmpp/default.nix
index 28946bd1a6e7..3826a746758f 100644
--- a/pkgs/development/python-modules/nbxmpp/default.nix
+++ b/pkgs/development/python-modules/nbxmpp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchzip, gobject-introspection, idna, libsoup, precis-i18n, pygobject3, pyopenssl }:
+{ lib, buildPythonPackage, fetchzip, gobject-introspection, idna, libsoup, precis-i18n, pygobject3, pyopenssl }:
 
 let
   pname = "nbxmpp";
diff --git a/pkgs/development/python-modules/ncclient/default.nix b/pkgs/development/python-modules/ncclient/default.nix
index f933587dcad1..ba3b9e4b0873 100644
--- a/pkgs/development/python-modules/ncclient/default.nix
+++ b/pkgs/development/python-modules/ncclient/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , paramiko
diff --git a/pkgs/development/python-modules/ndg-httpsclient/default.nix b/pkgs/development/python-modules/ndg-httpsclient/default.nix
index 7768614a5d12..0082b8e8db23 100644
--- a/pkgs/development/python-modules/ndg-httpsclient/default.nix
+++ b/pkgs/development/python-modules/ndg-httpsclient/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , pyopenssl
diff --git a/pkgs/development/python-modules/netaddr/default.nix b/pkgs/development/python-modules/netaddr/default.nix
index 7f4aab9c3714..3f7f78a374cb 100644
--- a/pkgs/development/python-modules/netaddr/default.nix
+++ b/pkgs/development/python-modules/netaddr/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
diff --git a/pkgs/development/python-modules/netcdf4/default.nix b/pkgs/development/python-modules/netcdf4/default.nix
index 456124b19bd3..60f7dbe6c239 100644
--- a/pkgs/development/python-modules/netcdf4/default.nix
+++ b/pkgs/development/python-modules/netcdf4/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonPackage, fetchPypi, isPyPy, pytest
+{ lib, buildPythonPackage, fetchPypi, isPyPy, pytest
 , numpy, zlib, netcdf, hdf5, curl, libjpeg, cython, cftime
 }:
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/netdisco/default.nix b/pkgs/development/python-modules/netdisco/default.nix
index e546ac6cd579..489b6bddf562 100644
--- a/pkgs/development/python-modules/netdisco/default.nix
+++ b/pkgs/development/python-modules/netdisco/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, isPy3k, fetchPypi, requests, zeroconf, netifaces, pytest }:
+{ lib, buildPythonPackage, isPy3k, fetchPypi, requests, zeroconf, netifaces, pytest }:
 
 buildPythonPackage rec {
   pname = "netdisco";
diff --git a/pkgs/development/python-modules/netifaces/default.nix b/pkgs/development/python-modules/netifaces/default.nix
index 07dc63c2181f..f7638b29a4c2 100644
--- a/pkgs/development/python-modules/netifaces/default.nix
+++ b/pkgs/development/python-modules/netifaces/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/neuronpy/default.nix b/pkgs/development/python-modules/neuronpy/default.nix
index b81398f918cd..2d388dfa4c27 100644
--- a/pkgs/development/python-modules/neuronpy/default.nix
+++ b/pkgs/development/python-modules/neuronpy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , numpy
diff --git a/pkgs/development/python-modules/nevow/default.nix b/pkgs/development/python-modules/nevow/default.nix
index 356754fdeac8..b608ae58fc70 100644
--- a/pkgs/development/python-modules/nevow/default.nix
+++ b/pkgs/development/python-modules/nevow/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchpatch, fetchPypi, isPy3k, twisted }:
+{ lib, buildPythonPackage, fetchpatch, fetchPypi, isPy3k, twisted }:
 
 buildPythonPackage rec {
   pname = "Nevow";
diff --git a/pkgs/development/python-modules/nimfa/default.nix b/pkgs/development/python-modules/nimfa/default.nix
index dc889440aa41..eb04e0c4d89d 100644
--- a/pkgs/development/python-modules/nimfa/default.nix
+++ b/pkgs/development/python-modules/nimfa/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/nine/default.nix b/pkgs/development/python-modules/nine/default.nix
index 1747332ed5a2..e2ca5c6f27dd 100644
--- a/pkgs/development/python-modules/nine/default.nix
+++ b/pkgs/development/python-modules/nine/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/nipy/default.nix b/pkgs/development/python-modules/nipy/default.nix
index cb7871aed610..6229baef32a3 100644
--- a/pkgs/development/python-modules/nipy/default.nix
+++ b/pkgs/development/python-modules/nipy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
diff --git a/pkgs/development/python-modules/nixpkgs/default.nix b/pkgs/development/python-modules/nixpkgs/default.nix
index 4edd31d6a25f..acebe5d758f7 100644
--- a/pkgs/development/python-modules/nixpkgs/default.nix
+++ b/pkgs/development/python-modules/nixpkgs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pbr
diff --git a/pkgs/development/python-modules/node-semver/default.nix b/pkgs/development/python-modules/node-semver/default.nix
index 5ba62fb9210e..535ff621de5c 100644
--- a/pkgs/development/python-modules/node-semver/default.nix
+++ b/pkgs/development/python-modules/node-semver/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, pytest }:
+{ lib, fetchPypi, buildPythonPackage, pytest }:
 
 buildPythonPackage rec {
   version = "0.7.0";
diff --git a/pkgs/development/python-modules/noise/default.nix b/pkgs/development/python-modules/noise/default.nix
index 98f336c49866..ebd0178602ca 100644
--- a/pkgs/development/python-modules/noise/default.nix
+++ b/pkgs/development/python-modules/noise/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "noise";
diff --git a/pkgs/development/python-modules/nose-cover3/default.nix b/pkgs/development/python-modules/nose-cover3/default.nix
index 185270176acb..b75dcc526c5f 100644
--- a/pkgs/development/python-modules/nose-cover3/default.nix
+++ b/pkgs/development/python-modules/nose-cover3/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/nose-cprof/default.nix b/pkgs/development/python-modules/nose-cprof/default.nix
index 4f90ee4be8b4..f4959ec7be78 100644
--- a/pkgs/development/python-modules/nose-cprof/default.nix
+++ b/pkgs/development/python-modules/nose-cprof/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/nose-focus/default.nix b/pkgs/development/python-modules/nose-focus/default.nix
index 8e31867d85c0..2805dc4545af 100644
--- a/pkgs/development/python-modules/nose-focus/default.nix
+++ b/pkgs/development/python-modules/nose-focus/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, six, nose, nose-of-yeti
+{ lib, buildPythonPackage, fetchFromGitHub, six, nose, nose-of-yeti
 , nose-pattern-exclude, which }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/nose-of-yeti/default.nix b/pkgs/development/python-modules/nose-of-yeti/default.nix
index 2bd63f3295d4..16fb264b39ae 100644
--- a/pkgs/development/python-modules/nose-of-yeti/default.nix
+++ b/pkgs/development/python-modules/nose-of-yeti/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, six, nose, fudge, should-dsl }:
+{ lib, buildPythonPackage, fetchFromGitHub, six, nose, fudge, should-dsl }:
 
 buildPythonPackage rec {
   pname = "nose-of-yeti";
diff --git a/pkgs/development/python-modules/nose-pattern-exclude/default.nix b/pkgs/development/python-modules/nose-pattern-exclude/default.nix
index 05a7102f1ae7..a550dc5aee15 100644
--- a/pkgs/development/python-modules/nose-pattern-exclude/default.nix
+++ b/pkgs/development/python-modules/nose-pattern-exclude/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, nose }:
+{ lib, buildPythonPackage, fetchPypi, nose }:
 
 buildPythonPackage rec {
   pname = "nose-pattern-exclude";
diff --git a/pkgs/development/python-modules/nose/default.nix b/pkgs/development/python-modules/nose/default.nix
index 2805b7c2ea19..456bbfd9aedd 100644
--- a/pkgs/development/python-modules/nose/default.nix
+++ b/pkgs/development/python-modules/nose/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , python
diff --git a/pkgs/development/python-modules/nose2/default.nix b/pkgs/development/python-modules/nose2/default.nix
index b815e223d82d..29ea73619ff1 100644
--- a/pkgs/development/python-modules/nose2/default.nix
+++ b/pkgs/development/python-modules/nose2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/nose_progressive/default.nix b/pkgs/development/python-modules/nose_progressive/default.nix
index b920bb40736c..bef7058bc3fe 100644
--- a/pkgs/development/python-modules/nose_progressive/default.nix
+++ b/pkgs/development/python-modules/nose_progressive/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/nosejs/default.nix b/pkgs/development/python-modules/nosejs/default.nix
index c165e87ff2ee..f80953bd2d71 100644
--- a/pkgs/development/python-modules/nosejs/default.nix
+++ b/pkgs/development/python-modules/nosejs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/nosexcover/default.nix b/pkgs/development/python-modules/nosexcover/default.nix
index 36747a50aae7..f60ed65448d7 100644
--- a/pkgs/development/python-modules/nosexcover/default.nix
+++ b/pkgs/development/python-modules/nosexcover/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , coverage
diff --git a/pkgs/development/python-modules/notmuch/2.nix b/pkgs/development/python-modules/notmuch/2.nix
index 970928e03f40..bde039836ffa 100644
--- a/pkgs/development/python-modules/notmuch/2.nix
+++ b/pkgs/development/python-modules/notmuch/2.nix
@@ -1,5 +1,5 @@
 { lib
-, stdenv
+
 , buildPythonPackage
 , notmuch
 , python
diff --git a/pkgs/development/python-modules/notmuch/default.nix b/pkgs/development/python-modules/notmuch/default.nix
index 609d4c78d5d7..90695b84c660 100644
--- a/pkgs/development/python-modules/notmuch/default.nix
+++ b/pkgs/development/python-modules/notmuch/default.nix
@@ -1,5 +1,5 @@
 { lib
-, stdenv
+
 , buildPythonPackage
 , notmuch
 , python
diff --git a/pkgs/development/python-modules/ntplib/default.nix b/pkgs/development/python-modules/ntplib/default.nix
index 266482a8ff28..be8a370f3f3a 100644
--- a/pkgs/development/python-modules/ntplib/default.nix
+++ b/pkgs/development/python-modules/ntplib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/numericalunits/default.nix b/pkgs/development/python-modules/numericalunits/default.nix
index 0c71b065a32d..8e2f630fdba6 100644
--- a/pkgs/development/python-modules/numericalunits/default.nix
+++ b/pkgs/development/python-modules/numericalunits/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/nvchecker/default.nix b/pkgs/development/python-modules/nvchecker/default.nix
index 832e281a9a1e..17537be82b49 100644
--- a/pkgs/development/python-modules/nvchecker/default.nix
+++ b/pkgs/development/python-modules/nvchecker/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , pythonOlder
diff --git a/pkgs/development/python-modules/nwdiag/default.nix b/pkgs/development/python-modules/nwdiag/default.nix
index 4676fdef0cdc..c8147d9d9a4e 100644
--- a/pkgs/development/python-modules/nwdiag/default.nix
+++ b/pkgs/development/python-modules/nwdiag/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, buildPythonPackage, pep8, nose, unittest2, docutils
+{ lib, fetchurl, buildPythonPackage, pep8, nose, unittest2, docutils
 , blockdiag, setuptools
 }:
 
diff --git a/pkgs/development/python-modules/nxt-python/default.nix b/pkgs/development/python-modules/nxt-python/default.nix
index 4057ba1de8ad..38920dc55429 100644
--- a/pkgs/development/python-modules/nxt-python/default.nix
+++ b/pkgs/development/python-modules/nxt-python/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchgit
 , isPy3k
diff --git a/pkgs/development/python-modules/oath/default.nix b/pkgs/development/python-modules/oath/default.nix
index 158cf0368406..fd12a830472b 100644
--- a/pkgs/development/python-modules/oath/default.nix
+++ b/pkgs/development/python-modules/oath/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/oauth/default.nix b/pkgs/development/python-modules/oauth/default.nix
index 0e53eaec7c0e..c74de8d6bd6e 100644
--- a/pkgs/development/python-modules/oauth/default.nix
+++ b/pkgs/development/python-modules/oauth/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/oauth2/default.nix b/pkgs/development/python-modules/oauth2/default.nix
index 70b2e94e37ca..d9c0ae505f71 100644
--- a/pkgs/development/python-modules/oauth2/default.nix
+++ b/pkgs/development/python-modules/oauth2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , httplib2
diff --git a/pkgs/development/python-modules/oauthlib/3.1.nix b/pkgs/development/python-modules/oauthlib/3.1.nix
index 40501733e4c7..10757812037a 100644
--- a/pkgs/development/python-modules/oauthlib/3.1.nix
+++ b/pkgs/development/python-modules/oauthlib/3.1.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , mock
diff --git a/pkgs/development/python-modules/oauthlib/default.nix b/pkgs/development/python-modules/oauthlib/default.nix
index df65547a256d..5c4cbc78adb7 100644
--- a/pkgs/development/python-modules/oauthlib/default.nix
+++ b/pkgs/development/python-modules/oauthlib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , mock
diff --git a/pkgs/development/python-modules/obfsproxy/default.nix b/pkgs/development/python-modules/obfsproxy/default.nix
index 1dec57cafb44..b5736851fbb6 100644
--- a/pkgs/development/python-modules/obfsproxy/default.nix
+++ b/pkgs/development/python-modules/obfsproxy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchgit
 , pyptlib
diff --git a/pkgs/development/python-modules/objgraph/default.nix b/pkgs/development/python-modules/objgraph/default.nix
index 8bb119bcb4bf..c79b11252be0 100644
--- a/pkgs/development/python-modules/objgraph/default.nix
+++ b/pkgs/development/python-modules/objgraph/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPyPy
diff --git a/pkgs/development/python-modules/offtrac/default.nix b/pkgs/development/python-modules/offtrac/default.nix
index edec161a133b..1ae555ffa15a 100644
--- a/pkgs/development/python-modules/offtrac/default.nix
+++ b/pkgs/development/python-modules/offtrac/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/ofxclient/default.nix b/pkgs/development/python-modules/ofxclient/default.nix
index 5ef7060b7f66..72e2be7c78bd 100644
--- a/pkgs/development/python-modules/ofxclient/default.nix
+++ b/pkgs/development/python-modules/ofxclient/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi,
+{ lib, buildPythonPackage, fetchPypi,
  ofxhome, ofxparse, beautifulsoup4, lxml, keyring
 }:
 
diff --git a/pkgs/development/python-modules/ofxhome/default.nix b/pkgs/development/python-modules/ofxhome/default.nix
index d9a28da18060..72ca65ed1711 100644
--- a/pkgs/development/python-modules/ofxhome/default.nix
+++ b/pkgs/development/python-modules/ofxhome/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, nose }:
+{ lib, buildPythonPackage, fetchPypi, nose }:
 
 buildPythonPackage rec {
   version = "0.3.3";
diff --git a/pkgs/development/python-modules/ofxparse/default.nix b/pkgs/development/python-modules/ofxparse/default.nix
index 235875eec7ce..d018a924d898 100644
--- a/pkgs/development/python-modules/ofxparse/default.nix
+++ b/pkgs/development/python-modules/ofxparse/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/ofxtools/default.nix b/pkgs/development/python-modules/ofxtools/default.nix
index 8f280d1cfd45..a32b0b232949 100644
--- a/pkgs/development/python-modules/ofxtools/default.nix
+++ b/pkgs/development/python-modules/ofxtools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , nose
diff --git a/pkgs/development/python-modules/olefile/default.nix b/pkgs/development/python-modules/olefile/default.nix
index 96c0a0b51bef..d2c39e54ef48 100644
--- a/pkgs/development/python-modules/olefile/default.nix
+++ b/pkgs/development/python-modules/olefile/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 buildPythonPackage rec {
   pname = "olefile";
   version = "0.46";
diff --git a/pkgs/development/python-modules/omegaconf/default.nix b/pkgs/development/python-modules/omegaconf/default.nix
index 99b9cccc7de6..ad9da46243b0 100644
--- a/pkgs/development/python-modules/omegaconf/default.nix
+++ b/pkgs/development/python-modules/omegaconf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, pythonOlder
+{ lib, buildPythonPackage, fetchFromGitHub, pythonOlder
 , pytest, pytestrunner, pyyaml, six, pathlib2, isPy27 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/onkyo-eiscp/default.nix b/pkgs/development/python-modules/onkyo-eiscp/default.nix
index 067db3a69fef..087706784323 100644
--- a/pkgs/development/python-modules/onkyo-eiscp/default.nix
+++ b/pkgs/development/python-modules/onkyo-eiscp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , docopt, netifaces }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/openant/default.nix b/pkgs/development/python-modules/openant/default.nix
index 374b7cb059d1..71f699e0552a 100644
--- a/pkgs/development/python-modules/openant/default.nix
+++ b/pkgs/development/python-modules/openant/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , pyusb
diff --git a/pkgs/development/python-modules/openbabel-bindings/default.nix b/pkgs/development/python-modules/openbabel-bindings/default.nix
index 18a6a8dd032c..6488b8fad2fb 100644
--- a/pkgs/development/python-modules/openbabel-bindings/default.nix
+++ b/pkgs/development/python-modules/openbabel-bindings/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, openbabel, python, buildPythonPackage }:
+{ lib, openbabel, python, buildPythonPackage }:
 
 buildPythonPackage rec {
   pname = "openbabel";
diff --git a/pkgs/development/python-modules/openidc-client/default.nix b/pkgs/development/python-modules/openidc-client/default.nix
index 7d373c13a8a5..ce6ccee9793c 100644
--- a/pkgs/development/python-modules/openidc-client/default.nix
+++ b/pkgs/development/python-modules/openidc-client/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, requests }:
+{ lib, buildPythonPackage, fetchPypi, requests }:
 
 buildPythonPackage rec {
   pname = "openidc-client";
diff --git a/pkgs/development/python-modules/openrazer/common.nix b/pkgs/development/python-modules/openrazer/common.nix
index 843380ebf21d..2ed723944dda 100644
--- a/pkgs/development/python-modules/openrazer/common.nix
+++ b/pkgs/development/python-modules/openrazer/common.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 }: rec {
   version = "2.9.0";
diff --git a/pkgs/development/python-modules/openrazer/daemon.nix b/pkgs/development/python-modules/openrazer/daemon.nix
index 6c22d3bae5d0..8b1ff86fcab3 100644
--- a/pkgs/development/python-modules/openrazer/daemon.nix
+++ b/pkgs/development/python-modules/openrazer/daemon.nix
@@ -11,12 +11,11 @@
 , pygobject3
 , pyudev
 , setproctitle
-, stdenv
 , wrapGAppsHook
 }:
 
 let
-  common = import ./common.nix { inherit stdenv lib fetchFromGitHub; };
+  common = import ./common.nix { inherit lib fetchFromGitHub; };
 in
 buildPythonApplication (common // rec {
   pname = "openrazer_daemon";
diff --git a/pkgs/development/python-modules/openrazer/pylib.nix b/pkgs/development/python-modules/openrazer/pylib.nix
index 52fe63318a3e..fb83d64c5020 100644
--- a/pkgs/development/python-modules/openrazer/pylib.nix
+++ b/pkgs/development/python-modules/openrazer/pylib.nix
@@ -3,12 +3,11 @@
 , dbus-python
 , fetchFromGitHub
 , numpy
-, stdenv
 , openrazer-daemon
 }:
 
 let
-  common = import ./common.nix { inherit stdenv lib fetchFromGitHub; };
+  common = import ./common.nix { inherit lib fetchFromGitHub; };
 in
 buildPythonPackage (common // rec {
   pname = "openrazer";
diff --git a/pkgs/development/python-modules/ordereddict/default.nix b/pkgs/development/python-modules/ordereddict/default.nix
index e2931840a66a..6ef006405853 100644
--- a/pkgs/development/python-modules/ordereddict/default.nix
+++ b/pkgs/development/python-modules/ordereddict/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/orderedmultidict/default.nix b/pkgs/development/python-modules/orderedmultidict/default.nix
index 1cd0f648bd3e..7c37cc7aa5aa 100644
--- a/pkgs/development/python-modules/orderedmultidict/default.nix
+++ b/pkgs/development/python-modules/orderedmultidict/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, flake8, six, pythonOlder, importlib-metadata }:
+{ lib, buildPythonPackage, fetchPypi, flake8, six, pythonOlder, importlib-metadata }:
 
 buildPythonPackage rec {
   pname = "orderedmultidict";
diff --git a/pkgs/development/python-modules/orderedset/default.nix b/pkgs/development/python-modules/orderedset/default.nix
index aced6cf08536..db9c265ef3ef 100644
--- a/pkgs/development/python-modules/orderedset/default.nix
+++ b/pkgs/development/python-modules/orderedset/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "orderedset";
diff --git a/pkgs/development/python-modules/osc/default.nix b/pkgs/development/python-modules/osc/default.nix
index dad78727f2d1..ac7e401bf6cc 100644
--- a/pkgs/development/python-modules/osc/default.nix
+++ b/pkgs/development/python-modules/osc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, bashInteractive, urlgrabber
+{ lib, buildPythonPackage, fetchFromGitHub, bashInteractive, urlgrabber
 , m2crypto, rpm, chardet
 }:
 
diff --git a/pkgs/development/python-modules/osmnx/default.nix b/pkgs/development/python-modules/osmnx/default.nix
index c624e262cf96..e1c22ddbfa3c 100755
--- a/pkgs/development/python-modules/osmnx/default.nix
+++ b/pkgs/development/python-modules/osmnx/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, geopandas, descartes, matplotlib, networkx, numpy
+{ lib, buildPythonPackage, fetchFromGitHub, geopandas, descartes, matplotlib, networkx, numpy
 , pandas, requests, Rtree, shapely, pytest, coverage, coveralls, folium, scikitlearn, scipy}:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/packaging/2.nix b/pkgs/development/python-modules/packaging/2.nix
index 5d841eb4fb13..a9b4e159469d 100644
--- a/pkgs/development/python-modules/packaging/2.nix
+++ b/pkgs/development/python-modules/packaging/2.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pyparsing
diff --git a/pkgs/development/python-modules/packaging/default.nix b/pkgs/development/python-modules/packaging/default.nix
index 973e516f5a90..689c2e4516d7 100644
--- a/pkgs/development/python-modules/packaging/default.nix
+++ b/pkgs/development/python-modules/packaging/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pyparsing
diff --git a/pkgs/development/python-modules/pagelabels/default.nix b/pkgs/development/python-modules/pagelabels/default.nix
index 5daa60f475d3..c17f0ad60dd5 100644
--- a/pkgs/development/python-modules/pagelabels/default.nix
+++ b/pkgs/development/python-modules/pagelabels/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pdfrw }:
+{ lib, buildPythonPackage, fetchPypi, pdfrw }:
 
 buildPythonPackage rec {
   pname = "pagelabels";
diff --git a/pkgs/development/python-modules/pagerduty/default.nix b/pkgs/development/python-modules/pagerduty/default.nix
index ebe2c8b5854d..8390cceb2fcf 100644
--- a/pkgs/development/python-modules/pagerduty/default.nix
+++ b/pkgs/development/python-modules/pagerduty/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/palettable/default.nix b/pkgs/development/python-modules/palettable/default.nix
index d61973aa3bfa..dce72bb74bb5 100644
--- a/pkgs/development/python-modules/palettable/default.nix
+++ b/pkgs/development/python-modules/palettable/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest }:
+{ lib, buildPythonPackage, fetchPypi, pytest }:
 
 buildPythonPackage rec {
   pname = "palettable";
diff --git a/pkgs/development/python-modules/pamqp/default.nix b/pkgs/development/python-modules/pamqp/default.nix
index 2e8e4500f247..6df8b5491c9a 100644
--- a/pkgs/development/python-modules/pamqp/default.nix
+++ b/pkgs/development/python-modules/pamqp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , mock
diff --git a/pkgs/development/python-modules/pandas-datareader/default.nix b/pkgs/development/python-modules/pandas-datareader/default.nix
index c4bf9c140df3..ea0ba44e99da 100644
--- a/pkgs/development/python-modules/pandas-datareader/default.nix
+++ b/pkgs/development/python-modules/pandas-datareader/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytestCheckHook
diff --git a/pkgs/development/python-modules/pandocfilters/default.nix b/pkgs/development/python-modules/pandocfilters/default.nix
index d31bc2657c93..8ca57440b3f7 100644
--- a/pkgs/development/python-modules/pandocfilters/default.nix
+++ b/pkgs/development/python-modules/pandocfilters/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/paperspace/default.nix b/pkgs/development/python-modules/paperspace/default.nix
index 4553b253819f..86dbffd76b76 100644
--- a/pkgs/development/python-modules/paperspace/default.nix
+++ b/pkgs/development/python-modules/paperspace/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage
+{ lib, fetchPypi, buildPythonPackage
 , boto3, requests, gradient_statsd, terminaltables
 , click-completion , click-didyoumean, click-help-colors
 , colorama, requests_toolbelt, gradient_sdk, progressbar2
diff --git a/pkgs/development/python-modules/parameterized/default.nix b/pkgs/development/python-modules/parameterized/default.nix
index 16925bd1286b..207a6a38bd5a 100644
--- a/pkgs/development/python-modules/parameterized/default.nix
+++ b/pkgs/development/python-modules/parameterized/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, nose, mock, glibcLocales, isPy3k, isPy38 }:
+{ lib, fetchPypi, buildPythonPackage, nose, mock, glibcLocales, isPy3k, isPy38 }:
 
 buildPythonPackage rec {
   pname = "parameterized";
diff --git a/pkgs/development/python-modules/paramz/default.nix b/pkgs/development/python-modules/paramz/default.nix
index 65cc79745caa..99065aa19944 100644
--- a/pkgs/development/python-modules/paramz/default.nix
+++ b/pkgs/development/python-modules/paramz/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, numpy, scipy, six, decorator, nose }:
+{ lib, buildPythonPackage, fetchPypi, numpy, scipy, six, decorator, nose }:
 
 buildPythonPackage rec {
   pname = "paramz";
diff --git a/pkgs/development/python-modules/parse-type/default.nix b/pkgs/development/python-modules/parse-type/default.nix
index d338a351e54b..decb15ff5e6c 100644
--- a/pkgs/development/python-modules/parse-type/default.nix
+++ b/pkgs/development/python-modules/parse-type/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi
+{ lib, fetchPypi
 , buildPythonPackage, pythonOlder
 , pytest, pytestrunner
 , parse, six, enum34
diff --git a/pkgs/development/python-modules/parse/default.nix b/pkgs/development/python-modules/parse/default.nix
index d72e607bc410..c5c0c1d7ae6d 100644
--- a/pkgs/development/python-modules/parse/default.nix
+++ b/pkgs/development/python-modules/parse/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi
+{ lib, fetchPypi
 , buildPythonPackage, python
 }:
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/parsedatetime/default.nix b/pkgs/development/python-modules/parsedatetime/default.nix
index 1f98940fff06..77196a7c0e99 100644
--- a/pkgs/development/python-modules/parsedatetime/default.nix
+++ b/pkgs/development/python-modules/parsedatetime/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/parsimonious/default.nix b/pkgs/development/python-modules/parsimonious/default.nix
index d41953246db9..557e632f2eda 100644
--- a/pkgs/development/python-modules/parsimonious/default.nix
+++ b/pkgs/development/python-modules/parsimonious/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/paste/default.nix b/pkgs/development/python-modules/paste/default.nix
index a29deed503ed..533a4dc3a308 100644
--- a/pkgs/development/python-modules/paste/default.nix
+++ b/pkgs/development/python-modules/paste/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/pastedeploy/default.nix b/pkgs/development/python-modules/pastedeploy/default.nix
index 950b232fa7e4..672708b0fd9d 100644
--- a/pkgs/development/python-modules/pastedeploy/default.nix
+++ b/pkgs/development/python-modules/pastedeploy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytestrunner
diff --git a/pkgs/development/python-modules/pastescript/default.nix b/pkgs/development/python-modules/pastescript/default.nix
index 57dbb7b9352e..a526d3833938 100644
--- a/pkgs/development/python-modules/pastescript/default.nix
+++ b/pkgs/development/python-modules/pastescript/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/patator/default.nix b/pkgs/development/python-modules/patator/default.nix
index 96ed85d7bcee..2f0a9b9b62b7 100644
--- a/pkgs/development/python-modules/patator/default.nix
+++ b/pkgs/development/python-modules/patator/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, isPy27, fetchPypi
+{ lib, buildPythonPackage, isPy27, fetchPypi
 , paramiko, pycurl, ajpy, impacket, pyopenssl, cx_oracle, mysqlclient
 , psycopg2, pycrypto, dnspython, ipy, pysnmp, pyasn1, pysqlcipher3 }:
 
diff --git a/pkgs/development/python-modules/patch-ng/default.nix b/pkgs/development/python-modules/patch-ng/default.nix
index 981dc067fe7e..126155722f4f 100644
--- a/pkgs/development/python-modules/patch-ng/default.nix
+++ b/pkgs/development/python-modules/patch-ng/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/patch/default.nix b/pkgs/development/python-modules/patch/default.nix
index 8d7e78c6c27c..ed11b3a4b52f 100644
--- a/pkgs/development/python-modules/patch/default.nix
+++ b/pkgs/development/python-modules/patch/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchzip
 }:
diff --git a/pkgs/development/python-modules/path-and-address/default.nix b/pkgs/development/python-modules/path-and-address/default.nix
index 9512b0eb0b88..bd71ffad0f2c 100644
--- a/pkgs/development/python-modules/path-and-address/default.nix
+++ b/pkgs/development/python-modules/path-and-address/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , pytest
diff --git a/pkgs/development/python-modules/pathos/default.nix b/pkgs/development/python-modules/pathos/default.nix
index 778070906022..fd6bd238d1e0 100644
--- a/pkgs/development/python-modules/pathos/default.nix
+++ b/pkgs/development/python-modules/pathos/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , dill
diff --git a/pkgs/development/python-modules/pathtools/default.nix b/pkgs/development/python-modules/pathtools/default.nix
index 57fff82a81d7..86c2aeb88dc0 100644
--- a/pkgs/development/python-modules/pathtools/default.nix
+++ b/pkgs/development/python-modules/pathtools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/patool/default.nix b/pkgs/development/python-modules/patool/default.nix
index 1420597a1f32..2fa07d32ccb1 100644
--- a/pkgs/development/python-modules/patool/default.nix
+++ b/pkgs/development/python-modules/patool/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonPackage, fetchFromGitHub, pytestCheckHook, p7zip,
+{ lib, buildPythonPackage, fetchFromGitHub, pytestCheckHook, p7zip,
   unzip, cabextract, zip, zopfli, lzip, zpaq, gnutar, gnugrep, diffutils, file,
   gzip, bzip2, xz}:
 
diff --git a/pkgs/development/python-modules/paver/default.nix b/pkgs/development/python-modules/paver/default.nix
index 5d01df22b6d5..8721ef3dd601 100644
--- a/pkgs/development/python-modules/paver/default.nix
+++ b/pkgs/development/python-modules/paver/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/pbkdf2/default.nix b/pkgs/development/python-modules/pbkdf2/default.nix
index 18a2b9b95a3a..8f489ca24b9c 100644
--- a/pkgs/development/python-modules/pbkdf2/default.nix
+++ b/pkgs/development/python-modules/pbkdf2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "pbkdf2";
diff --git a/pkgs/development/python-modules/pc-ble-driver-py/default.nix b/pkgs/development/python-modules/pc-ble-driver-py/default.nix
index 6a12eea1b00c..bd6432db534f 100644
--- a/pkgs/development/python-modules/pc-ble-driver-py/default.nix
+++ b/pkgs/development/python-modules/pc-ble-driver-py/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, cmake, git, swig, boost, udev, pc-ble-driver, pythonOlder
+{ lib, fetchFromGitHub, cmake, git, swig, boost, udev, pc-ble-driver, pythonOlder
 , buildPythonPackage, enum34, wrapt, future, setuptools, scikit-build, pythonAtLeast }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pcpp/default.nix b/pkgs/development/python-modules/pcpp/default.nix
index aea7ff0fcdaf..704e979c2caa 100644
--- a/pkgs/development/python-modules/pcpp/default.nix
+++ b/pkgs/development/python-modules/pcpp/default.nix
@@ -1,6 +1,6 @@
 { buildPythonPackage
 , fetchFromGitHub
-, lib, stdenv
+, lib
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pdf2image/default.nix b/pkgs/development/python-modules/pdf2image/default.nix
index adc43ef4c2ed..4eddc028a251 100644
--- a/pkgs/development/python-modules/pdf2image/default.nix
+++ b/pkgs/development/python-modules/pdf2image/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pillow, poppler_utils }:
+{ lib, buildPythonPackage, fetchPypi, pillow, poppler_utils }:
 
 buildPythonPackage rec {
   pname = "pdf2image";
diff --git a/pkgs/development/python-modules/pdfkit/default.nix b/pkgs/development/python-modules/pdfkit/default.nix
index 10bc09e8ca92..431f7f09796b 100644
--- a/pkgs/development/python-modules/pdfkit/default.nix
+++ b/pkgs/development/python-modules/pdfkit/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/pdfminer_six/default.nix b/pkgs/development/python-modules/pdfminer_six/default.nix
index 9a659eebe330..96ba66869055 100644
--- a/pkgs/development/python-modules/pdfminer_six/default.nix
+++ b/pkgs/development/python-modules/pdfminer_six/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, isPy3k, cryptography, chardet, nose, sortedcontainers }:
+{ lib, buildPythonPackage, fetchFromGitHub, isPy3k, cryptography, chardet, nose, sortedcontainers }:
 
 buildPythonPackage rec {
   pname = "pdfminer_six";
diff --git a/pkgs/development/python-modules/pdfposter/default.nix b/pkgs/development/python-modules/pdfposter/default.nix
index 0a21ed1e4999..00cfea5cc9b0 100644
--- a/pkgs/development/python-modules/pdfposter/default.nix
+++ b/pkgs/development/python-modules/pdfposter/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pypdf2 }:
+{ lib, buildPythonPackage, fetchPypi, pypdf2 }:
 
 buildPythonPackage rec {
   pname = "pdftools.pdfposter";
diff --git a/pkgs/development/python-modules/pdfrw/default.nix b/pkgs/development/python-modules/pdfrw/default.nix
index 49abb3751c91..5cc619ef6a47 100644
--- a/pkgs/development/python-modules/pdfrw/default.nix
+++ b/pkgs/development/python-modules/pdfrw/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "pdfrw";
diff --git a/pkgs/development/python-modules/pdfx/default.nix b/pkgs/development/python-modules/pdfx/default.nix
index 97dee7e75705..a8c110fdba70 100644
--- a/pkgs/development/python-modules/pdfx/default.nix
+++ b/pkgs/development/python-modules/pdfx/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, pdfminer, chardet, pytest }:
+{ lib, buildPythonPackage, fetchFromGitHub, pdfminer, chardet, pytest }:
 
 buildPythonPackage rec {
   pname = "pdfx";
diff --git a/pkgs/development/python-modules/pecan/default.nix b/pkgs/development/python-modules/pecan/default.nix
index ed0c89b7802b..a66c4077c3c9 100644
--- a/pkgs/development/python-modules/pecan/default.nix
+++ b/pkgs/development/python-modules/pecan/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchPypi
 , buildPythonPackage
 , isPy27
diff --git a/pkgs/development/python-modules/pelican/default.nix b/pkgs/development/python-modules/pelican/default.nix
index 0b103b780c08..71bec7e42df0 100644
--- a/pkgs/development/python-modules/pelican/default.nix
+++ b/pkgs/development/python-modules/pelican/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, isPy27
+{ lib, buildPythonPackage, fetchFromGitHub, isPy27
 , glibcLocales, git
 , mock, nose, markdown, lxml, typogrify
 , jinja2, pygments, docutils, pytz, unidecode, six, dateutil, feedgenerator
diff --git a/pkgs/development/python-modules/pep257/default.nix b/pkgs/development/python-modules/pep257/default.nix
index 296b55eec125..e9cba70e6317 100644
--- a/pkgs/development/python-modules/pep257/default.nix
+++ b/pkgs/development/python-modules/pep257/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchurl, pytest, mock }:
+{ lib, buildPythonPackage, fetchurl, pytest, mock }:
 buildPythonPackage rec {
   pname = "pep257";
   version = "0.7.0";
diff --git a/pkgs/development/python-modules/pep8/default.nix b/pkgs/development/python-modules/pep8/default.nix
index 8ef3bfea0f5d..cc0e546b957c 100644
--- a/pkgs/development/python-modules/pep8/default.nix
+++ b/pkgs/development/python-modules/pep8/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/peppercorn/default.nix b/pkgs/development/python-modules/peppercorn/default.nix
index 6caf61b0cd0d..310cc565b21f 100644
--- a/pkgs/development/python-modules/peppercorn/default.nix
+++ b/pkgs/development/python-modules/peppercorn/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/persisting-theory/default.nix b/pkgs/development/python-modules/persisting-theory/default.nix
index 86bae927d9ff..6859b6264a8f 100644
--- a/pkgs/development/python-modules/persisting-theory/default.nix
+++ b/pkgs/development/python-modules/persisting-theory/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , nose
 }:
 
diff --git a/pkgs/development/python-modules/pex/default.nix b/pkgs/development/python-modules/pex/default.nix
index 1d7de0088a84..e65f62c8ff7b 100644
--- a/pkgs/development/python-modules/pex/default.nix
+++ b/pkgs/development/python-modules/pex/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , setuptools
diff --git a/pkgs/development/python-modules/pexif/default.nix b/pkgs/development/python-modules/pexif/default.nix
index 326dde176ae6..a31d80eed052 100644
--- a/pkgs/development/python-modules/pexif/default.nix
+++ b/pkgs/development/python-modules/pexif/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/pg8000/1_12.nix b/pkgs/development/python-modules/pg8000/1_12.nix
index d84bb2014b80..e53817b3911b 100644
--- a/pkgs/development/python-modules/pg8000/1_12.nix
+++ b/pkgs/development/python-modules/pg8000/1_12.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytz
diff --git a/pkgs/development/python-modules/pg8000/default.nix b/pkgs/development/python-modules/pg8000/default.nix
index 8f63e00e7997..9f9bb1702a90 100644
--- a/pkgs/development/python-modules/pg8000/default.nix
+++ b/pkgs/development/python-modules/pg8000/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , scramp
diff --git a/pkgs/development/python-modules/pgpdump/default.nix b/pkgs/development/python-modules/pgpdump/default.nix
index d795cc3678f7..e952ced742c6 100644
--- a/pkgs/development/python-modules/pgpdump/default.nix
+++ b/pkgs/development/python-modules/pgpdump/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/pgspecial/default.nix b/pkgs/development/python-modules/pgspecial/default.nix
index 796a38198814..476921da632f 100644
--- a/pkgs/development/python-modules/pgspecial/default.nix
+++ b/pkgs/development/python-modules/pgspecial/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest, psycopg2, click, sqlparse }:
+{ lib, buildPythonPackage, fetchPypi, pytest, psycopg2, click, sqlparse }:
 
 buildPythonPackage rec {
   pname = "pgspecial";
diff --git a/pkgs/development/python-modules/phe/default.nix b/pkgs/development/python-modules/phe/default.nix
index 5a00a4ccb099..86a5ec848ace 100644
--- a/pkgs/development/python-modules/phe/default.nix
+++ b/pkgs/development/python-modules/phe/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPyPy, isPy3k, click, gmpy2, numpy } :
+{ lib, buildPythonPackage, fetchPypi, isPyPy, isPy3k, click, gmpy2, numpy } :
 
 let
   pname = "phe";
diff --git a/pkgs/development/python-modules/phonopy/default.nix b/pkgs/development/python-modules/phonopy/default.nix
index 03e0c54caab7..2259fcd7ba52 100644
--- a/pkgs/development/python-modules/phonopy/default.nix
+++ b/pkgs/development/python-modules/phonopy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, python, fetchPypi, numpy, pyyaml, matplotlib, h5py, spglib, pytestCheckHook }:
+{ lib, buildPythonPackage, python, fetchPypi, numpy, pyyaml, matplotlib, h5py, spglib, pytestCheckHook }:
 
 buildPythonPackage rec {
   pname = "phonopy";
diff --git a/pkgs/development/python-modules/phx-class-registry/default.nix b/pkgs/development/python-modules/phx-class-registry/default.nix
index 9ed84e86371c..94538dc6e74d 100644
--- a/pkgs/development/python-modules/phx-class-registry/default.nix
+++ b/pkgs/development/python-modules/phx-class-registry/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy27, pytestCheckHook }:
+{ lib, buildPythonPackage, fetchPypi, isPy27, pytestCheckHook }:
 
 buildPythonPackage rec {
   pname = "phx-class-registry";
diff --git a/pkgs/development/python-modules/pickleshare/default.nix b/pkgs/development/python-modules/pickleshare/default.nix
index 2151e13b960d..34798cc3ee5e 100644
--- a/pkgs/development/python-modules/pickleshare/default.nix
+++ b/pkgs/development/python-modules/pickleshare/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pathpy
diff --git a/pkgs/development/python-modules/pid/default.nix b/pkgs/development/python-modules/pid/default.nix
index 95aca29da5d1..f4ce57b3a20d 100644
--- a/pkgs/development/python-modules/pid/default.nix
+++ b/pkgs/development/python-modules/pid/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/piep/default.nix b/pkgs/development/python-modules/piep/default.nix
index c4fd24d070e6..aacd9e314cb3 100644
--- a/pkgs/development/python-modules/piep/default.nix
+++ b/pkgs/development/python-modules/piep/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/pika-pool/default.nix b/pkgs/development/python-modules/pika-pool/default.nix
index a36fcdf18bb5..051fdef8fe7d 100644
--- a/pkgs/development/python-modules/pika-pool/default.nix
+++ b/pkgs/development/python-modules/pika-pool/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , pika
 }:
 
diff --git a/pkgs/development/python-modules/pika/default.nix b/pkgs/development/python-modules/pika/default.nix
index ec8310bdb55f..c1bfe5297d71 100644
--- a/pkgs/development/python-modules/pika/default.nix
+++ b/pkgs/development/python-modules/pika/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/pikepdf/default.nix b/pkgs/development/python-modules/pikepdf/default.nix
index ff2a2ce4c5e7..38efe0a49b0a 100644
--- a/pkgs/development/python-modules/pikepdf/default.nix
+++ b/pkgs/development/python-modules/pikepdf/default.nix
@@ -18,7 +18,7 @@
 , qpdf
 , setuptools-scm-git-archive
 , setuptools_scm
-, lib, stdenv
+, lib
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pilkit/default.nix b/pkgs/development/python-modules/pilkit/default.nix
index 4a3c682c1229..bc21d6bf465e 100644
--- a/pkgs/development/python-modules/pilkit/default.nix
+++ b/pkgs/development/python-modules/pilkit/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pillow
diff --git a/pkgs/development/python-modules/pillowfight/default.nix b/pkgs/development/python-modules/pillowfight/default.nix
index 9e23f69d19c5..c022fdb988d5 100644
--- a/pkgs/development/python-modules/pillowfight/default.nix
+++ b/pkgs/development/python-modules/pillowfight/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pillow
diff --git a/pkgs/development/python-modules/pims/default.nix b/pkgs/development/python-modules/pims/default.nix
index d2a5641acff5..bfe4e2b9ea03 100644
--- a/pkgs/development/python-modules/pims/default.nix
+++ b/pkgs/development/python-modules/pims/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , slicerator
diff --git a/pkgs/development/python-modules/pivy/default.nix b/pkgs/development/python-modules/pivy/default.nix
index aae90d2f8b49..312c87ae5444 100644
--- a/pkgs/development/python-modules/pivy/default.nix
+++ b/pkgs/development/python-modules/pivy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, pkgs, qtbase, qmake, soqt }:
+{ lib, buildPythonPackage, fetchFromGitHub, pkgs, qtbase, qmake, soqt }:
 
 buildPythonPackage rec {
   pname = "pivy";
diff --git a/pkgs/development/python-modules/pkginfo/default.nix b/pkgs/development/python-modules/pkginfo/default.nix
index dbf487c5d3aa..5216ab17879d 100644
--- a/pkgs/development/python-modules/pkginfo/default.nix
+++ b/pkgs/development/python-modules/pkginfo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "pkginfo";
diff --git a/pkgs/development/python-modules/pkuseg/default.nix b/pkgs/development/python-modules/pkuseg/default.nix
index 8e3e301793aa..1944ac5197c3 100644
--- a/pkgs/development/python-modules/pkuseg/default.nix
+++ b/pkgs/development/python-modules/pkuseg/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/plac/default.nix b/pkgs/development/python-modules/plac/default.nix
index 9e2c66d9d1ed..9261133bc925 100644
--- a/pkgs/development/python-modules/plac/default.nix
+++ b/pkgs/development/python-modules/plac/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , python
diff --git a/pkgs/development/python-modules/pluginbase/default.nix b/pkgs/development/python-modules/pluginbase/default.nix
index 956ea1b720ae..697717eeca61 100644
--- a/pkgs/development/python-modules/pluginbase/default.nix
+++ b/pkgs/development/python-modules/pluginbase/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, pytest }:
+{ lib, fetchPypi, buildPythonPackage, pytest }:
 
 buildPythonPackage rec {
   version = "1.0.0";
diff --git a/pkgs/development/python-modules/plyvel/default.nix b/pkgs/development/python-modules/plyvel/default.nix
index d8537d68158a..aa247c8e4261 100644
--- a/pkgs/development/python-modules/plyvel/default.nix
+++ b/pkgs/development/python-modules/plyvel/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pkgs
diff --git a/pkgs/development/python-modules/pocket/default.nix b/pkgs/development/python-modules/pocket/default.nix
index 3599d3dec55d..e5a2d464bde8 100644
--- a/pkgs/development/python-modules/pocket/default.nix
+++ b/pkgs/development/python-modules/pocket/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , requests
diff --git a/pkgs/development/python-modules/polib/default.nix b/pkgs/development/python-modules/polib/default.nix
index f7c4e1139a86..00353ac0cca2 100644
--- a/pkgs/development/python-modules/polib/default.nix
+++ b/pkgs/development/python-modules/polib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "polib";
diff --git a/pkgs/development/python-modules/pomegranate/default.nix b/pkgs/development/python-modules/pomegranate/default.nix
index 7595730eb31b..8f260ad8ccb9 100644
--- a/pkgs/development/python-modules/pomegranate/default.nix
+++ b/pkgs/development/python-modules/pomegranate/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, numpy, scipy, cython, networkx, joblib, nose, pyyaml }:
+{ lib, buildPythonPackage, fetchFromGitHub, numpy, scipy, cython, networkx, joblib, nose, pyyaml }:
 
 buildPythonPackage rec {
   pname = "pomegranate";
diff --git a/pkgs/development/python-modules/pony/default.nix b/pkgs/development/python-modules/pony/default.nix
index 7a734927ee1e..03330c4cfec7 100644
--- a/pkgs/development/python-modules/pony/default.nix
+++ b/pkgs/development/python-modules/pony/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python, buildPythonPackage, fetchPypi }:
+{ lib, python, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "pony";
diff --git a/pkgs/development/python-modules/pooch/default.nix b/pkgs/development/python-modules/pooch/default.nix
index 282239d9890b..de0ba145828c 100644
--- a/pkgs/development/python-modules/pooch/default.nix
+++ b/pkgs/development/python-modules/pooch/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , isPy27
 , fetchPypi
diff --git a/pkgs/development/python-modules/poppler-qt5/default.nix b/pkgs/development/python-modules/poppler-qt5/default.nix
index 4aaaea406774..e94a234dc1a3 100644
--- a/pkgs/development/python-modules/poppler-qt5/default.nix
+++ b/pkgs/development/python-modules/poppler-qt5/default.nix
@@ -1,4 +1,4 @@
-{ buildPythonPackage, fetchPypi, lib, stdenv, sip, qtbase, pyqt5, poppler, pkg-config, fetchpatch
+{ buildPythonPackage, fetchPypi, lib, sip, qtbase, pyqt5, poppler, pkg-config, fetchpatch
 , substituteAll
 }:
 
diff --git a/pkgs/development/python-modules/portend/default.nix b/pkgs/development/python-modules/portend/default.nix
index 10b30d05fa3e..1408f7ca905f 100644
--- a/pkgs/development/python-modules/portend/default.nix
+++ b/pkgs/development/python-modules/portend/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , pytest, setuptools_scm, tempora, pytest-black, pytestcov }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/posix_ipc/default.nix b/pkgs/development/python-modules/posix_ipc/default.nix
index 2fb6128dc1b1..59f4b4b707f2 100644
--- a/pkgs/development/python-modules/posix_ipc/default.nix
+++ b/pkgs/development/python-modules/posix_ipc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/potr/default.nix b/pkgs/development/python-modules/potr/default.nix
index 9f2774b9a607..671010bb9009 100644
--- a/pkgs/development/python-modules/potr/default.nix
+++ b/pkgs/development/python-modules/potr/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, pycrypto }:
+{ lib, fetchPypi, buildPythonPackage, pycrypto }:
 
 buildPythonPackage rec {
   pname = "python-potr";
diff --git a/pkgs/development/python-modules/power/default.nix b/pkgs/development/python-modules/power/default.nix
index d1998faf6b64..8f72553092ec 100644
--- a/pkgs/development/python-modules/power/default.nix
+++ b/pkgs/development/python-modules/power/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/pox/default.nix b/pkgs/development/python-modules/pox/default.nix
index e7013154f998..24591824e07d 100644
--- a/pkgs/development/python-modules/pox/default.nix
+++ b/pkgs/development/python-modules/pox/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/poyo/default.nix b/pkgs/development/python-modules/poyo/default.nix
index d600e46c6b42..b7963258f338 100644
--- a/pkgs/development/python-modules/poyo/default.nix
+++ b/pkgs/development/python-modules/poyo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/ppscore/default.nix b/pkgs/development/python-modules/ppscore/default.nix
index 00542c6e90e1..ad3a393a00d1 100644
--- a/pkgs/development/python-modules/ppscore/default.nix
+++ b/pkgs/development/python-modules/ppscore/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , isPy27
diff --git a/pkgs/development/python-modules/praw/6.3.nix b/pkgs/development/python-modules/praw/6.3.nix
index 00182eda0379..3fc485c00ec2 100644
--- a/pkgs/development/python-modules/praw/6.3.nix
+++ b/pkgs/development/python-modules/praw/6.3.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub
+{ lib, buildPythonPackage, fetchFromGitHub
 , betamax
 , betamax-serializers
 , betamax-matchers
diff --git a/pkgs/development/python-modules/praw/default.nix b/pkgs/development/python-modules/praw/default.nix
index 61b869e87fb2..a4c048e9c9bf 100644
--- a/pkgs/development/python-modules/praw/default.nix
+++ b/pkgs/development/python-modules/praw/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub
+{ lib, buildPythonPackage, fetchFromGitHub
 , betamax
 , betamax-serializers
 , betamax-matchers
diff --git a/pkgs/development/python-modules/prawcore/default.nix b/pkgs/development/python-modules/prawcore/default.nix
index 533c31d87ce2..2b6eff885f9e 100644
--- a/pkgs/development/python-modules/prawcore/default.nix
+++ b/pkgs/development/python-modules/prawcore/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy27
+{ lib, buildPythonPackage, fetchPypi, isPy27
 , requests
 , testfixtures, mock, requests_toolbelt
 , betamax, betamax-serializers, betamax-matchers, pytest
diff --git a/pkgs/development/python-modules/preggy/default.nix b/pkgs/development/python-modules/preggy/default.nix
index a2144f303be7..44be123335f9 100644
--- a/pkgs/development/python-modules/preggy/default.nix
+++ b/pkgs/development/python-modules/preggy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, six, unidecode, nose, yanc }:
+{ lib, buildPythonPackage, fetchPypi, six, unidecode, nose, yanc }:
 
 buildPythonPackage rec {
   pname = "preggy";
diff --git a/pkgs/development/python-modules/preshed/default.nix b/pkgs/development/python-modules/preshed/default.nix
index 5d75c95d770b..767d5b867f0e 100644
--- a/pkgs/development/python-modules/preshed/default.nix
+++ b/pkgs/development/python-modules/preshed/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , murmurhash
diff --git a/pkgs/development/python-modules/pretend/default.nix b/pkgs/development/python-modules/pretend/default.nix
index 4fe726591e60..87e0e6613b1d 100644
--- a/pkgs/development/python-modules/pretend/default.nix
+++ b/pkgs/development/python-modules/pretend/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "pretend";
diff --git a/pkgs/development/python-modules/prettytable/1.nix b/pkgs/development/python-modules/prettytable/1.nix
index 5b7457af9bf7..0bd18f0721fc 100644
--- a/pkgs/development/python-modules/prettytable/1.nix
+++ b/pkgs/development/python-modules/prettytable/1.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , glibcLocales
diff --git a/pkgs/development/python-modules/prettytable/default.nix b/pkgs/development/python-modules/prettytable/default.nix
index 5a15cfd24eb0..5463403dec7b 100644
--- a/pkgs/development/python-modules/prettytable/default.nix
+++ b/pkgs/development/python-modules/prettytable/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , glibcLocales
diff --git a/pkgs/development/python-modules/proboscis/default.nix b/pkgs/development/python-modules/proboscis/default.nix
index 00905136716f..a2a1d04ebe0e 100644
--- a/pkgs/development/python-modules/proboscis/default.nix
+++ b/pkgs/development/python-modules/proboscis/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, nose }:
+{ lib, buildPythonPackage, fetchPypi, nose }:
 
 buildPythonPackage rec {
   pname = "proboscis";
diff --git a/pkgs/development/python-modules/process-tests/default.nix b/pkgs/development/python-modules/process-tests/default.nix
index 4b83205d723e..abf175b55312 100644
--- a/pkgs/development/python-modules/process-tests/default.nix
+++ b/pkgs/development/python-modules/process-tests/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/proglog/default.nix b/pkgs/development/python-modules/proglog/default.nix
index 3f8c11043811..9839ea9dd233 100644
--- a/pkgs/development/python-modules/proglog/default.nix
+++ b/pkgs/development/python-modules/proglog/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, tqdm }:
+{ lib, fetchPypi, buildPythonPackage, tqdm }:
 
 buildPythonPackage rec {
   pname = "proglog";
diff --git a/pkgs/development/python-modules/progress/default.nix b/pkgs/development/python-modules/progress/default.nix
index 2c5dbc1386e8..fcc1a7a92293 100644
--- a/pkgs/development/python-modules/progress/default.nix
+++ b/pkgs/development/python-modules/progress/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , python
diff --git a/pkgs/development/python-modules/progressbar/default.nix b/pkgs/development/python-modules/progressbar/default.nix
index a1fdddd95db8..68967ecf6533 100644
--- a/pkgs/development/python-modules/progressbar/default.nix
+++ b/pkgs/development/python-modules/progressbar/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "progressbar";
diff --git a/pkgs/development/python-modules/progressbar2/default.nix b/pkgs/development/python-modules/progressbar2/default.nix
index cc3029ade64e..b5c488c0838c 100644
--- a/pkgs/development/python-modules/progressbar2/default.nix
+++ b/pkgs/development/python-modules/progressbar2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , python
 , buildPythonPackage
 , fetchPypi
diff --git a/pkgs/development/python-modules/progressbar231/default.nix b/pkgs/development/python-modules/progressbar231/default.nix
index f8980647482c..d421efde8aa1 100644
--- a/pkgs/development/python-modules/progressbar231/default.nix
+++ b/pkgs/development/python-modules/progressbar231/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k }:
+{ lib, buildPythonPackage, fetchPypi, isPy3k }:
 
 buildPythonPackage rec {
   pname = "progressbar231";
diff --git a/pkgs/development/python-modules/progressbar33/default.nix b/pkgs/development/python-modules/progressbar33/default.nix
index 0b53b83f5cca..a483a6001f00 100644
--- a/pkgs/development/python-modules/progressbar33/default.nix
+++ b/pkgs/development/python-modules/progressbar33/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "progressbar33";
diff --git a/pkgs/development/python-modules/proto-plus/default.nix b/pkgs/development/python-modules/proto-plus/default.nix
index 1cd732b19aea..cc9444098def 100644
--- a/pkgs/development/python-modules/proto-plus/default.nix
+++ b/pkgs/development/python-modules/proto-plus/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/prov/default.nix b/pkgs/development/python-modules/prov/default.nix
index 9ab4cbf72bdf..acee0f09b848 100644
--- a/pkgs/development/python-modules/prov/default.nix
+++ b/pkgs/development/python-modules/prov/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , lxml
diff --git a/pkgs/development/python-modules/ptable/default.nix b/pkgs/development/python-modules/ptable/default.nix
index ffa9bdacd2d1..ae2ad58a1acb 100644
--- a/pkgs/development/python-modules/ptable/default.nix
+++ b/pkgs/development/python-modules/ptable/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, nose }:
+{ lib, buildPythonPackage, fetchFromGitHub, nose }:
 
 buildPythonPackage {
   pname = "ptable";
diff --git a/pkgs/development/python-modules/ptest/default.nix b/pkgs/development/python-modules/ptest/default.nix
index c19780a4411c..2a4180a4cbed 100644
--- a/pkgs/development/python-modules/ptest/default.nix
+++ b/pkgs/development/python-modules/ptest/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 }:
diff --git a/pkgs/development/python-modules/ptpython/default.nix b/pkgs/development/python-modules/ptpython/default.nix
index fd7b92692fc6..2758c3a582ff 100644
--- a/pkgs/development/python-modules/ptpython/default.nix
+++ b/pkgs/development/python-modules/ptpython/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonPackage, pythonOlder, fetchPypi, prompt_toolkit, appdirs, docopt, jedi
+{ lib, buildPythonPackage, pythonOlder, fetchPypi, prompt_toolkit, appdirs, docopt, jedi
 , pygments, importlib-metadata, isPy3k }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/publicsuffix/default.nix b/pkgs/development/python-modules/publicsuffix/default.nix
index abac4fb3baa0..997bc31c8656 100644
--- a/pkgs/development/python-modules/publicsuffix/default.nix
+++ b/pkgs/development/python-modules/publicsuffix/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k }:
+{ lib, buildPythonPackage, fetchPypi, isPy3k }:
 
 buildPythonPackage rec {
   pname = "publicsuffix";
diff --git a/pkgs/development/python-modules/publicsuffix2/default.nix b/pkgs/development/python-modules/publicsuffix2/default.nix
index 2d9bc73baa3f..30a02ec2f0dd 100644
--- a/pkgs/development/python-modules/publicsuffix2/default.nix
+++ b/pkgs/development/python-modules/publicsuffix2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, requests }:
+{ lib, buildPythonPackage, fetchFromGitHub, requests }:
 
 buildPythonPackage rec {
   pname = "publicsuffix2";
diff --git a/pkgs/development/python-modules/pudb/default.nix b/pkgs/development/python-modules/pudb/default.nix
index 0ee2a8470b5e..db48fbf1e480 100644
--- a/pkgs/development/python-modules/pudb/default.nix
+++ b/pkgs/development/python-modules/pudb/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pygments
diff --git a/pkgs/development/python-modules/pure-pcapy3/default.nix b/pkgs/development/python-modules/pure-pcapy3/default.nix
index 9679cc593df0..636cbaff71cc 100644
--- a/pkgs/development/python-modules/pure-pcapy3/default.nix
+++ b/pkgs/development/python-modules/pure-pcapy3/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "pure-pcapy3";
diff --git a/pkgs/development/python-modules/purepng/default.nix b/pkgs/development/python-modules/purepng/default.nix
index 715b2ca69029..3615935b88ec 100644
--- a/pkgs/development/python-modules/purepng/default.nix
+++ b/pkgs/development/python-modules/purepng/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , python
 , fetchFromGitHub
diff --git a/pkgs/development/python-modules/pushover/default.nix b/pkgs/development/python-modules/pushover/default.nix
index 1093f125a969..1ef14af135f2 100644
--- a/pkgs/development/python-modules/pushover/default.nix
+++ b/pkgs/development/python-modules/pushover/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , requests }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pvlib/default.nix b/pkgs/development/python-modules/pvlib/default.nix
index 006246e58366..3a93b36cb2b7 100644
--- a/pkgs/development/python-modules/pvlib/default.nix
+++ b/pkgs/development/python-modules/pvlib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, fetchpatch, pythonOlder, numpy, pandas, pytz, six
+{ lib, buildPythonPackage, fetchPypi, fetchpatch, pythonOlder, numpy, pandas, pytz, six
 , pytestCheckHook, flaky, mock, pytest-mock, requests }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pweave/default.nix b/pkgs/development/python-modules/pweave/default.nix
index fe74fcece1c0..1b8e1a3cc6f1 100644
--- a/pkgs/development/python-modules/pweave/default.nix
+++ b/pkgs/development/python-modules/pweave/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , mock
diff --git a/pkgs/development/python-modules/pwntools/default.nix b/pkgs/development/python-modules/pwntools/default.nix
index 77f7859c6d47..a24e1d5db13e 100644
--- a/pkgs/development/python-modules/pwntools/default.nix
+++ b/pkgs/development/python-modules/pwntools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , debugger
 , fetchPypi
diff --git a/pkgs/development/python-modules/pxml/default.nix b/pkgs/development/python-modules/pxml/default.nix
index 57614089e66e..21dc2f4abc4d 100644
--- a/pkgs/development/python-modules/pxml/default.nix
+++ b/pkgs/development/python-modules/pxml/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , pythonAtLeast
 , isPy27
 , buildPythonPackage
diff --git a/pkgs/development/python-modules/py-radix/default.nix b/pkgs/development/python-modules/py-radix/default.nix
index fa057ae99254..18fff5ec97f6 100644
--- a/pkgs/development/python-modules/py-radix/default.nix
+++ b/pkgs/development/python-modules/py-radix/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , coverage
diff --git a/pkgs/development/python-modules/py/default.nix b/pkgs/development/python-modules/py/default.nix
index 4d2b77bb1f2a..aa12deabb37e 100644
--- a/pkgs/development/python-modules/py/default.nix
+++ b/pkgs/development/python-modules/py/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, setuptools_scm }:
+{ lib, buildPythonPackage, fetchPypi, setuptools_scm }:
 
 buildPythonPackage rec {
   pname = "py";
diff --git a/pkgs/development/python-modules/py3dns/default.nix b/pkgs/development/python-modules/py3dns/default.nix
index 1f7aeaf1e118..12297b9a6f78 100644
--- a/pkgs/development/python-modules/py3dns/default.nix
+++ b/pkgs/development/python-modules/py3dns/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/py3status/default.nix b/pkgs/development/python-modules/py3status/default.nix
index 71314a08eebc..bd0f179dc850 100644
--- a/pkgs/development/python-modules/py3status/default.nix
+++ b/pkgs/development/python-modules/py3status/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , requests
diff --git a/pkgs/development/python-modules/py4j/default.nix b/pkgs/development/python-modules/py4j/default.nix
index 588d7a32d22f..8eb1649fcc5e 100644
--- a/pkgs/development/python-modules/py4j/default.nix
+++ b/pkgs/development/python-modules/py4j/default.nix
@@ -1,4 +1,4 @@
-{ buildPythonPackage, fetchPypi, lib, stdenv }:
+{ buildPythonPackage, fetchPypi, lib }:
 
 buildPythonPackage rec {
   pname = "py4j";
diff --git a/pkgs/development/python-modules/pyGithub/default.nix b/pkgs/development/python-modules/pyGithub/default.nix
index f53cc45b9fe7..c214b375ff38 100644
--- a/pkgs/development/python-modules/pyGithub/default.nix
+++ b/pkgs/development/python-modules/pyGithub/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , cryptography
 , deprecated
diff --git a/pkgs/development/python-modules/py_scrypt/default.nix b/pkgs/development/python-modules/py_scrypt/default.nix
index af86ce3821eb..b5ae4193f18c 100644
--- a/pkgs/development/python-modules/py_scrypt/default.nix
+++ b/pkgs/development/python-modules/py_scrypt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , openssl
diff --git a/pkgs/development/python-modules/pyacoustid/default.nix b/pkgs/development/python-modules/pyacoustid/default.nix
index d424b2144292..5bebb1d5bc7e 100644
--- a/pkgs/development/python-modules/pyacoustid/default.nix
+++ b/pkgs/development/python-modules/pyacoustid/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , requests
diff --git a/pkgs/development/python-modules/pyalgotrade/default.nix b/pkgs/development/python-modules/pyalgotrade/default.nix
index 075103e9e40f..680a8f6f8307 100644
--- a/pkgs/development/python-modules/pyalgotrade/default.nix
+++ b/pkgs/development/python-modules/pyalgotrade/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , matplotlib
diff --git a/pkgs/development/python-modules/pyamf/default.nix b/pkgs/development/python-modules/pyamf/default.nix
index f0cf111a87ad..cebb1cc3f0ba 100644
--- a/pkgs/development/python-modules/pyamf/default.nix
+++ b/pkgs/development/python-modules/pyamf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, isPy3k, defusedxml }:
+{ lib, fetchPypi, buildPythonPackage, isPy3k, defusedxml }:
 
 buildPythonPackage rec {
   pname = "PyAMF";
diff --git a/pkgs/development/python-modules/pyannotate/default.nix b/pkgs/development/python-modules/pyannotate/default.nix
index 9c9c18a886e9..332a4161fe78 100644
--- a/pkgs/development/python-modules/pyannotate/default.nix
+++ b/pkgs/development/python-modules/pyannotate/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
diff --git a/pkgs/development/python-modules/pyasn1-modules/default.nix b/pkgs/development/python-modules/pyasn1-modules/default.nix
index 2be2e8b9c11a..4bb515e17aa6 100644
--- a/pkgs/development/python-modules/pyasn1-modules/default.nix
+++ b/pkgs/development/python-modules/pyasn1-modules/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pyasn1
diff --git a/pkgs/development/python-modules/pyasn1/default.nix b/pkgs/development/python-modules/pyasn1/default.nix
index 9b269f79c86a..a0037d646835 100644
--- a/pkgs/development/python-modules/pyasn1/default.nix
+++ b/pkgs/development/python-modules/pyasn1/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, }:
+{ lib, buildPythonPackage, fetchPypi, }:
 
 buildPythonPackage rec {
   pname = "pyasn1";
diff --git a/pkgs/development/python-modules/pyatv/default.nix b/pkgs/development/python-modules/pyatv/default.nix
index 187f94dbd778..9e4f872e6f2e 100644
--- a/pkgs/development/python-modules/pyatv/default.nix
+++ b/pkgs/development/python-modules/pyatv/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage
+{ lib, buildPythonPackage
 , aiohttp
 , aiozeroconf
 , asynctest
diff --git a/pkgs/development/python-modules/pyaudio/default.nix b/pkgs/development/python-modules/pyaudio/default.nix
index d88dc7009b73..e937b8759f69 100644
--- a/pkgs/development/python-modules/pyaudio/default.nix
+++ b/pkgs/development/python-modules/pyaudio/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPyPy
diff --git a/pkgs/development/python-modules/pyaxmlparser/default.nix b/pkgs/development/python-modules/pyaxmlparser/default.nix
index 63e180b11b2b..e77c6dda8402 100644
--- a/pkgs/development/python-modules/pyaxmlparser/default.nix
+++ b/pkgs/development/python-modules/pyaxmlparser/default.nix
@@ -1,4 +1,4 @@
-{ buildPythonPackage, lib, stdenv, lxml, click, fetchFromGitHub, pytest, isPy3k }:
+{ buildPythonPackage, lib, lxml, click, fetchFromGitHub, pytest, isPy3k }:
 
 buildPythonPackage rec {
   version = "0.3.24";
diff --git a/pkgs/development/python-modules/pybase64/default.nix b/pkgs/development/python-modules/pybase64/default.nix
index e462d53fea88..aa65d7ccadfe 100644
--- a/pkgs/development/python-modules/pybase64/default.nix
+++ b/pkgs/development/python-modules/pybase64/default.nix
@@ -1,4 +1,4 @@
-{ buildPythonPackage, isPy3k, lib, stdenv, fetchPypi, six, pytest }:
+{ buildPythonPackage, isPy3k, lib, fetchPypi, six, pytest }:
 
 buildPythonPackage rec {
   pname = "pybase64";
diff --git a/pkgs/development/python-modules/pybindgen/default.nix b/pkgs/development/python-modules/pybindgen/default.nix
index 4b6f7f1682ff..9e8174f9b7f7 100644
--- a/pkgs/development/python-modules/pybindgen/default.nix
+++ b/pkgs/development/python-modules/pybindgen/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, isPy3k, setuptools_scm, pygccxml }:
+{ lib, fetchPypi, buildPythonPackage, isPy3k, setuptools_scm, pygccxml }:
 buildPythonPackage rec {
   pname = "PyBindGen";
   version = "0.21.0";
diff --git a/pkgs/development/python-modules/pyblosxom/default.nix b/pkgs/development/python-modules/pyblosxom/default.nix
index dee6aea559a5..77e47eb98364 100644
--- a/pkgs/development/python-modules/pyblosxom/default.nix
+++ b/pkgs/development/python-modules/pyblosxom/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , pygments
diff --git a/pkgs/development/python-modules/pybluez/default.nix b/pkgs/development/python-modules/pybluez/default.nix
index a02861c68cda..1cd7d91ef259 100644
--- a/pkgs/development/python-modules/pybluez/default.nix
+++ b/pkgs/development/python-modules/pybluez/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , pkgs
diff --git a/pkgs/development/python-modules/pybrowserid/default.nix b/pkgs/development/python-modules/pybrowserid/default.nix
index eacbd81055c5..7517de597544 100644
--- a/pkgs/development/python-modules/pybrowserid/default.nix
+++ b/pkgs/development/python-modules/pybrowserid/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , requests, mock }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pycallgraph/default.nix b/pkgs/development/python-modules/pycallgraph/default.nix
index 1353af406ca4..af9f18aad2c6 100644
--- a/pkgs/development/python-modules/pycallgraph/default.nix
+++ b/pkgs/development/python-modules/pycallgraph/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/pycangjie/default.nix b/pkgs/development/python-modules/pycangjie/default.nix
index 6fc9d2af1cbc..1f7ccde2576b 100644
--- a/pkgs/development/python-modules/pycangjie/default.nix
+++ b/pkgs/development/python-modules/pycangjie/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, bash, autoconf, automake, libtool, pkg-config, libcangjie
+{ lib, fetchurl, bash, autoconf, automake, libtool, pkg-config, libcangjie
 , sqlite, buildPythonPackage, cython
 }:
 
diff --git a/pkgs/development/python-modules/pycapnp/default.nix b/pkgs/development/python-modules/pycapnp/default.nix
index ab9088cf1e5f..7e8954e04d0c 100644
--- a/pkgs/development/python-modules/pycapnp/default.nix
+++ b/pkgs/development/python-modules/pycapnp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , capnproto
 , cython
diff --git a/pkgs/development/python-modules/pycarddav/default.nix b/pkgs/development/python-modules/pycarddav/default.nix
index 7885cf65b83b..b3479695a890 100644
--- a/pkgs/development/python-modules/pycarddav/default.nix
+++ b/pkgs/development/python-modules/pycarddav/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/pycares/default.nix b/pkgs/development/python-modules/pycares/default.nix
index 8404063ac1f8..9b3ec94babcf 100644
--- a/pkgs/development/python-modules/pycares/default.nix
+++ b/pkgs/development/python-modules/pycares/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , python
diff --git a/pkgs/development/python-modules/pychart/default.nix b/pkgs/development/python-modules/pychart/default.nix
index 2c2399fca92e..f020361474a1 100644
--- a/pkgs/development/python-modules/pychart/default.nix
+++ b/pkgs/development/python-modules/pychart/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy27 }:
+{ lib, buildPythonPackage, fetchPypi, isPy27 }:
 
 buildPythonPackage rec {
   pname = "pychart";
diff --git a/pkgs/development/python-modules/pychef/default.nix b/pkgs/development/python-modules/pychef/default.nix
index 1702cde840cf..ddd7dec820db 100644
--- a/pkgs/development/python-modules/pychef/default.nix
+++ b/pkgs/development/python-modules/pychef/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/pyclipper/default.nix b/pkgs/development/python-modules/pyclipper/default.nix
index e89389547096..27a2a1d80844 100644
--- a/pkgs/development/python-modules/pyclipper/default.nix
+++ b/pkgs/development/python-modules/pyclipper/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchPypi
 , buildPythonPackage
 , setuptools_scm
diff --git a/pkgs/development/python-modules/pycm/default.nix b/pkgs/development/python-modules/pycm/default.nix
index ada4eeeb556c..8e0a9e3b152e 100644
--- a/pkgs/development/python-modules/pycm/default.nix
+++ b/pkgs/development/python-modules/pycm/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, isPy3k, numpy, pytest }:
+{ lib, buildPythonPackage, fetchFromGitHub, isPy3k, numpy, pytest }:
 
 buildPythonPackage rec {
   pname = "pycm";
diff --git a/pkgs/development/python-modules/pycoin/default.nix b/pkgs/development/python-modules/pycoin/default.nix
index a21c8f6f549d..d42cfcadfee5 100644
--- a/pkgs/development/python-modules/pycoin/default.nix
+++ b/pkgs/development/python-modules/pycoin/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchPypi
 , buildPythonPackage
 , gnupg
diff --git a/pkgs/development/python-modules/pycollada/default.nix b/pkgs/development/python-modules/pycollada/default.nix
index 4b177012f4ed..e8e0809c0222 100644
--- a/pkgs/development/python-modules/pycollada/default.nix
+++ b/pkgs/development/python-modules/pycollada/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, numpy, dateutil }:
+{ lib, fetchPypi, buildPythonPackage, numpy, dateutil }:
 
 buildPythonPackage rec {
   pname = "pycollada";
diff --git a/pkgs/development/python-modules/pycontracts/default.nix b/pkgs/development/python-modules/pycontracts/default.nix
index 0b511e024dc0..2a90bef72567 100644
--- a/pkgs/development/python-modules/pycontracts/default.nix
+++ b/pkgs/development/python-modules/pycontracts/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , nose, pyparsing, decorator, six, future }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pycountry/default.nix b/pkgs/development/python-modules/pycountry/default.nix
index b402e9092406..525a56107118 100644
--- a/pkgs/development/python-modules/pycountry/default.nix
+++ b/pkgs/development/python-modules/pycountry/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 ,
diff --git a/pkgs/development/python-modules/pycparser/default.nix b/pkgs/development/python-modules/pycparser/default.nix
index a246ce53a1e0..5fe7cab1cdb2 100644
--- a/pkgs/development/python-modules/pycparser/default.nix
+++ b/pkgs/development/python-modules/pycparser/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, python }:
+{ lib, buildPythonPackage, fetchPypi, python }:
 
 buildPythonPackage rec {
   pname = "pycparser";
diff --git a/pkgs/development/python-modules/pycryptopp/default.nix b/pkgs/development/python-modules/pycryptopp/default.nix
index 0f17d9e59a80..7079cde0d597 100644
--- a/pkgs/development/python-modules/pycryptopp/default.nix
+++ b/pkgs/development/python-modules/pycryptopp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , fetchpatch
diff --git a/pkgs/development/python-modules/pydenticon/default.nix b/pkgs/development/python-modules/pydenticon/default.nix
index 763cfb9b8456..44913e1de476 100644
--- a/pkgs/development/python-modules/pydenticon/default.nix
+++ b/pkgs/development/python-modules/pydenticon/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pillow
diff --git a/pkgs/development/python-modules/pydicom/default.nix b/pkgs/development/python-modules/pydicom/default.nix
index 08c5f099d28c..be3cddc7c14a 100644
--- a/pkgs/development/python-modules/pydicom/default.nix
+++ b/pkgs/development/python-modules/pydicom/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , isPy27
diff --git a/pkgs/development/python-modules/pydispatcher/default.nix b/pkgs/development/python-modules/pydispatcher/default.nix
index d132fad73138..d949b16d1057 100644
--- a/pkgs/development/python-modules/pydispatcher/default.nix
+++ b/pkgs/development/python-modules/pydispatcher/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/pydns/default.nix b/pkgs/development/python-modules/pydns/default.nix
index a93820bfaef2..a6fb07c15206 100644
--- a/pkgs/development/python-modules/pydns/default.nix
+++ b/pkgs/development/python-modules/pydns/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/pyechonest/default.nix b/pkgs/development/python-modules/pyechonest/default.nix
index 10ade4fa2cab..83820629552f 100644
--- a/pkgs/development/python-modules/pyechonest/default.nix
+++ b/pkgs/development/python-modules/pyechonest/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k }:
+{ lib, buildPythonPackage, fetchPypi, isPy3k }:
 
 buildPythonPackage rec {
   pname = "pyechonest";
diff --git a/pkgs/development/python-modules/pyee/default.nix b/pkgs/development/python-modules/pyee/default.nix
index 712db3e87123..7e388b93971b 100644
--- a/pkgs/development/python-modules/pyee/default.nix
+++ b/pkgs/development/python-modules/pyee/default.nix
@@ -1,4 +1,4 @@
-{ buildPythonPackage, fetchPypi, lib, vcversioner, pytestrunner, mock, pytest, pytest-asyncio, pytest-trio, twisted, zipp, pyparsing, pyhamcrest, futures, attrs, stdenv, isPy27 }:
+{ buildPythonPackage, fetchPypi, lib, vcversioner, pytestrunner, mock, pytest, pytest-asyncio, pytest-trio, twisted, zipp, pyparsing, pyhamcrest, futures, attrs, isPy27 }:
 
 buildPythonPackage rec {
   pname = "pyee";
diff --git a/pkgs/development/python-modules/pyemd/default.nix b/pkgs/development/python-modules/pyemd/default.nix
index 4e7594fbab5b..c7b277a60989 100644
--- a/pkgs/development/python-modules/pyemd/default.nix
+++ b/pkgs/development/python-modules/pyemd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, numpy, cython }:
+{ lib, buildPythonPackage, fetchPypi, numpy, cython }:
 
 buildPythonPackage rec {
   pname = "pyemd";
diff --git a/pkgs/development/python-modules/pyexcelerator/default.nix b/pkgs/development/python-modules/pyexcelerator/default.nix
index 373885073949..b3a376616d3b 100644
--- a/pkgs/development/python-modules/pyexcelerator/default.nix
+++ b/pkgs/development/python-modules/pyexcelerator/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/pyext/default.nix b/pkgs/development/python-modules/pyext/default.nix
index befbd3c2de1d..eb88bf785860 100644
--- a/pkgs/development/python-modules/pyext/default.nix
+++ b/pkgs/development/python-modules/pyext/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub }:
+{ lib, buildPythonPackage, fetchFromGitHub }:
 
 buildPythonPackage {
     pname = "pyext";
diff --git a/pkgs/development/python-modules/pyfantom/default.nix b/pkgs/development/python-modules/pyfantom/default.nix
index a17388b34b5c..d7c77e763e76 100644
--- a/pkgs/development/python-modules/pyfantom/default.nix
+++ b/pkgs/development/python-modules/pyfantom/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchgit
 }:
diff --git a/pkgs/development/python-modules/pyfftw/default.nix b/pkgs/development/python-modules/pyfftw/default.nix
index ff66dc8f8675..155254a6af35 100644
--- a/pkgs/development/python-modules/pyfftw/default.nix
+++ b/pkgs/development/python-modules/pyfftw/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , fftw, fftwFloat, fftwLongDouble, numpy, scipy, cython, dask }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pyfiglet/default.nix b/pkgs/development/python-modules/pyfiglet/default.nix
index a4fe9ec9dfe6..e9671e03cb3b 100644
--- a/pkgs/development/python-modules/pyfiglet/default.nix
+++ b/pkgs/development/python-modules/pyfiglet/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   version = "0.8.post1";
diff --git a/pkgs/development/python-modules/pyflakes/default.nix b/pkgs/development/python-modules/pyflakes/default.nix
index 2ff88a78a4e7..cf1b88781837 100644
--- a/pkgs/development/python-modules/pyflakes/default.nix
+++ b/pkgs/development/python-modules/pyflakes/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pythonOlder, unittest2 }:
+{ lib, buildPythonPackage, fetchPypi, pythonOlder, unittest2 }:
 
 buildPythonPackage rec {
   pname = "pyflakes";
diff --git a/pkgs/development/python-modules/pyftpdlib/default.nix b/pkgs/development/python-modules/pyftpdlib/default.nix
index 5d0d72eb4959..b3aa456c4a9d 100644
--- a/pkgs/development/python-modules/pyftpdlib/default.nix
+++ b/pkgs/development/python-modules/pyftpdlib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , mock
diff --git a/pkgs/development/python-modules/pyfttt/default.nix b/pkgs/development/python-modules/pyfttt/default.nix
index 8648ad4f876d..c8b52fce409a 100644
--- a/pkgs/development/python-modules/pyfttt/default.nix
+++ b/pkgs/development/python-modules/pyfttt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , requests }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pygal/default.nix b/pkgs/development/python-modules/pygal/default.nix
index 6855c9e4f02c..ec4cff2de615 100644
--- a/pkgs/development/python-modules/pygal/default.nix
+++ b/pkgs/development/python-modules/pygal/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , fetchpatch
diff --git a/pkgs/development/python-modules/pygame_sdl2/default.nix b/pkgs/development/python-modules/pygame_sdl2/default.nix
index afca3dd7bc19..00965b4a1495 100644
--- a/pkgs/development/python-modules/pygame_sdl2/default.nix
+++ b/pkgs/development/python-modules/pygame_sdl2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchurl, isPy27
+{ lib, buildPythonPackage, fetchurl, isPy27
 , cython, SDL2, SDL2_image, SDL2_ttf, SDL2_mixer, libjpeg, libpng }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pygccxml/default.nix b/pkgs/development/python-modules/pygccxml/default.nix
index a1a6b0222b83..7e06b27a23f6 100644
--- a/pkgs/development/python-modules/pygccxml/default.nix
+++ b/pkgs/development/python-modules/pygccxml/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, castxml, fetchFromGitHub, buildPythonPackage,
+{ lib, castxml, fetchFromGitHub, buildPythonPackage,
 llvmPackages }:
 buildPythonPackage rec {
   pname = "pygccxml";
diff --git a/pkgs/development/python-modules/pygeoip/default.nix b/pkgs/development/python-modules/pygeoip/default.nix
index 7aa16ac1e9a8..b9b588d669ae 100644
--- a/pkgs/development/python-modules/pygeoip/default.nix
+++ b/pkgs/development/python-modules/pygeoip/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , nose }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pygments-better-html/default.nix b/pkgs/development/python-modules/pygments-better-html/default.nix
index 2e5d6271c66a..152e9463b0e2 100644
--- a/pkgs/development/python-modules/pygments-better-html/default.nix
+++ b/pkgs/development/python-modules/pygments-better-html/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pygments
diff --git a/pkgs/development/python-modules/pygments-markdown-lexer/default.nix b/pkgs/development/python-modules/pygments-markdown-lexer/default.nix
index 31a6b043494d..0a88e34005cd 100644
--- a/pkgs/development/python-modules/pygments-markdown-lexer/default.nix
+++ b/pkgs/development/python-modules/pygments-markdown-lexer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pygments
diff --git a/pkgs/development/python-modules/pygpgme/default.nix b/pkgs/development/python-modules/pygpgme/default.nix
index 416410ab3ce7..29be02751bb2 100644
--- a/pkgs/development/python-modules/pygpgme/default.nix
+++ b/pkgs/development/python-modules/pygpgme/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchurl, isPyPy
+{ lib, buildPythonPackage, fetchurl, isPyPy
 , gpgme }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pygraphviz/default.nix b/pkgs/development/python-modules/pygraphviz/default.nix
index f239647bafa5..e9b66a95771b 100644
--- a/pkgs/development/python-modules/pygraphviz/default.nix
+++ b/pkgs/development/python-modules/pygraphviz/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, isPy3k, fetchPypi, substituteAll, graphviz
+{ lib, buildPythonPackage, isPy3k, fetchPypi, substituteAll, graphviz
 , pkg-config, doctest-ignore-unicode, mock, nose }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pygreat/default.nix b/pkgs/development/python-modules/pygreat/default.nix
index 20a96d1f8f2c..92526b465b17 100644
--- a/pkgs/development/python-modules/pygreat/default.nix
+++ b/pkgs/development/python-modules/pygreat/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, isPy3k, fetchFromGitHub, future, pyusb }:
+{ lib, buildPythonPackage, isPy3k, fetchFromGitHub, future, pyusb }:
 
 buildPythonPackage {
   pname = "pygreat";
diff --git a/pkgs/development/python-modules/pygrok/default.nix b/pkgs/development/python-modules/pygrok/default.nix
index 8f694a117fe5..56d8b05af9a5 100644
--- a/pkgs/development/python-modules/pygrok/default.nix
+++ b/pkgs/development/python-modules/pygrok/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonPackage, fetchFromGitHub, regex, pytest }:
+{ lib, buildPythonPackage, fetchFromGitHub, regex, pytest }:
 
 buildPythonPackage rec {
   pname = "pygrok";
diff --git a/pkgs/development/python-modules/pyhamcrest/1.nix b/pkgs/development/python-modules/pyhamcrest/1.nix
index 5df52d9b658c..4c2ec4df6810 100644
--- a/pkgs/development/python-modules/pyhamcrest/1.nix
+++ b/pkgs/development/python-modules/pyhamcrest/1.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , mock, pytest
 , six
 }:
diff --git a/pkgs/development/python-modules/pyhamcrest/default.nix b/pkgs/development/python-modules/pyhamcrest/default.nix
index a66e26b1319a..fd6ba2f2df98 100644
--- a/pkgs/development/python-modules/pyhamcrest/default.nix
+++ b/pkgs/development/python-modules/pyhamcrest/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , mock, pytest
 , six
 }:
diff --git a/pkgs/development/python-modules/pyhomematic/default.nix b/pkgs/development/python-modules/pyhomematic/default.nix
index 502d648b4007..65d3f60da047 100644
--- a/pkgs/development/python-modules/pyhomematic/default.nix
+++ b/pkgs/development/python-modules/pyhomematic/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, isPy3k, fetchPypi }:
+{ lib, buildPythonPackage, isPy3k, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "pyhomematic";
diff --git a/pkgs/development/python-modules/pyicu/default.nix b/pkgs/development/python-modules/pyicu/default.nix
index 3512e33c81d7..e152002cdd15 100644
--- a/pkgs/development/python-modules/pyicu/default.nix
+++ b/pkgs/development/python-modules/pyicu/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/pyinotify/default.nix b/pkgs/development/python-modules/pyinotify/default.nix
index 92c2f5bb6717..e5714ec18001 100644
--- a/pkgs/development/python-modules/pyinotify/default.nix
+++ b/pkgs/development/python-modules/pyinotify/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/pyinputevent/default.nix b/pkgs/development/python-modules/pyinputevent/default.nix
index a52a0bb40010..1d4f4cfa7847 100644
--- a/pkgs/development/python-modules/pyinputevent/default.nix
+++ b/pkgs/development/python-modules/pyinputevent/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 }:
diff --git a/pkgs/development/python-modules/pykdtree/default.nix b/pkgs/development/python-modules/pykdtree/default.nix
index f37ddb2483e1..3161548f8b58 100644
--- a/pkgs/development/python-modules/pykdtree/default.nix
+++ b/pkgs/development/python-modules/pykdtree/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, numpy, nose, openmp }:
+{ lib, buildPythonPackage, fetchPypi, numpy, nose, openmp }:
 
 buildPythonPackage rec {
   pname = "pykdtree";
diff --git a/pkgs/development/python-modules/pykerberos/default.nix b/pkgs/development/python-modules/pykerberos/default.nix
index 07a32a25a0c6..13d7a4fd2483 100644
--- a/pkgs/development/python-modules/pykerberos/default.nix
+++ b/pkgs/development/python-modules/pykerberos/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, krb5 }:
+{ lib, fetchPypi, buildPythonPackage, krb5 }:
 
 buildPythonPackage rec {
   pname = "pykerberos";
diff --git a/pkgs/development/python-modules/pykickstart/default.nix b/pkgs/development/python-modules/pykickstart/default.nix
index bc10295e232a..8b1eefdafedc 100644
--- a/pkgs/development/python-modules/pykickstart/default.nix
+++ b/pkgs/development/python-modules/pykickstart/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , urlgrabber
diff --git a/pkgs/development/python-modules/pylast/default.nix b/pkgs/development/python-modules/pylast/default.nix
index 707554be5599..26812ff9151a 100644
--- a/pkgs/development/python-modules/pylast/default.nix
+++ b/pkgs/development/python-modules/pylast/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k, certifi, six
+{ lib, buildPythonPackage, fetchPypi, isPy3k, certifi, six
 , setuptools_scm
 }:
 
diff --git a/pkgs/development/python-modules/pylibconfig2/default.nix b/pkgs/development/python-modules/pylibconfig2/default.nix
index 25989d0353e0..2cabb78544eb 100644
--- a/pkgs/development/python-modules/pylibconfig2/default.nix
+++ b/pkgs/development/python-modules/pylibconfig2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pyparsing }:
+{ lib, buildPythonPackage, fetchPypi, pyparsing }:
 buildPythonPackage rec {
   pname = "pylibconfig2";
   version = "0.2.5";
diff --git a/pkgs/development/python-modules/pyliblo/default.nix b/pkgs/development/python-modules/pyliblo/default.nix
index 454f08fd10ed..64f8e62c2862 100644
--- a/pkgs/development/python-modules/pyliblo/default.nix
+++ b/pkgs/development/python-modules/pyliblo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , isPyPy
diff --git a/pkgs/development/python-modules/pylibmc/default.nix b/pkgs/development/python-modules/pylibmc/default.nix
index 8bb62c091348..9fb8401bdc47 100644
--- a/pkgs/development/python-modules/pylibmc/default.nix
+++ b/pkgs/development/python-modules/pylibmc/default.nix
@@ -1,4 +1,4 @@
-{ buildPythonPackage, fetchPypi, lib, stdenv, libmemcached, zlib, cyrus_sasl }:
+{ buildPythonPackage, fetchPypi, lib, libmemcached, zlib, cyrus_sasl }:
 
 buildPythonPackage rec {
   version = "1.6.1";
diff --git a/pkgs/development/python-modules/pymaging/default.nix b/pkgs/development/python-modules/pymaging/default.nix
index 3b35ce3e7166..8869924bddba 100644
--- a/pkgs/development/python-modules/pymaging/default.nix
+++ b/pkgs/development/python-modules/pymaging/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 }:
diff --git a/pkgs/development/python-modules/pymaging_png/default.nix b/pkgs/development/python-modules/pymaging_png/default.nix
index 64ea5b4ff5b0..6d12ddd40062 100644
--- a/pkgs/development/python-modules/pymaging_png/default.nix
+++ b/pkgs/development/python-modules/pymaging_png/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , pymaging
diff --git a/pkgs/development/python-modules/pymatgen/default.nix b/pkgs/development/python-modules/pymatgen/default.nix
index 84fcdbef6a3f..bae7a5613239 100644
--- a/pkgs/development/python-modules/pymatgen/default.nix
+++ b/pkgs/development/python-modules/pymatgen/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , enum34
 , glibcLocales
 , matplotlib
diff --git a/pkgs/development/python-modules/pymeeus/default.nix b/pkgs/development/python-modules/pymeeus/default.nix
index 96fb9d6f6943..13e80a38e4b5 100644
--- a/pkgs/development/python-modules/pymeeus/default.nix
+++ b/pkgs/development/python-modules/pymeeus/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest }:
+{ lib, buildPythonPackage, fetchPypi, pytest }:
 
 buildPythonPackage rec {
   pname = "PyMeeus";
diff --git a/pkgs/development/python-modules/pymemoize/default.nix b/pkgs/development/python-modules/pymemoize/default.nix
index b44ff9fef491..f66a6ef702b0 100644
--- a/pkgs/development/python-modules/pymemoize/default.nix
+++ b/pkgs/development/python-modules/pymemoize/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , django
diff --git a/pkgs/development/python-modules/pymetar/default.nix b/pkgs/development/python-modules/pymetar/default.nix
index 84139091ae49..72a17f27dca9 100644
--- a/pkgs/development/python-modules/pymetar/default.nix
+++ b/pkgs/development/python-modules/pymetar/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python, buildPythonPackage, isPy3k, fetchPypi }:
+{ lib, python, buildPythonPackage, isPy3k, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "pymetar";
diff --git a/pkgs/development/python-modules/pymetno/default.nix b/pkgs/development/python-modules/pymetno/default.nix
index 2b10e2f164fb..b3d91c595d80 100644
--- a/pkgs/development/python-modules/pymetno/default.nix
+++ b/pkgs/development/python-modules/pymetno/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , aiohttp
diff --git a/pkgs/development/python-modules/pymsgbox/default.nix b/pkgs/development/python-modules/pymsgbox/default.nix
index d69c0011ac53..84ab3dcab1bf 100644
--- a/pkgs/development/python-modules/pymsgbox/default.nix
+++ b/pkgs/development/python-modules/pymsgbox/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, tkinter }:
+{ lib, fetchPypi, buildPythonPackage, tkinter }:
 
 buildPythonPackage rec {
   pname = "PyMsgBox";
diff --git a/pkgs/development/python-modules/pymupdf/default.nix b/pkgs/development/python-modules/pymupdf/default.nix
index 8ce7d5a19c6f..501f829dc142 100644
--- a/pkgs/development/python-modules/pymupdf/default.nix
+++ b/pkgs/development/python-modules/pymupdf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, mupdf, swig }:
+{ lib, buildPythonPackage, fetchPypi, mupdf, swig }:
 buildPythonPackage rec {
   pname = "pymupdf";
   version = "1.18.0";
diff --git a/pkgs/development/python-modules/pymysqlsa/default.nix b/pkgs/development/python-modules/pymysqlsa/default.nix
index 6009b03e5086..49b5a49193de 100644
--- a/pkgs/development/python-modules/pymysqlsa/default.nix
+++ b/pkgs/development/python-modules/pymysqlsa/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pymysql
diff --git a/pkgs/development/python-modules/pynac/default.nix b/pkgs/development/python-modules/pynac/default.nix
index 656825a36bbb..a6df8cb036d4 100644
--- a/pkgs/development/python-modules/pynac/default.nix
+++ b/pkgs/development/python-modules/pynac/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 }:
diff --git a/pkgs/development/python-modules/pynacl/default.nix b/pkgs/development/python-modules/pynacl/default.nix
index be69bf3d8023..37cf0a9ef10a 100644
--- a/pkgs/development/python-modules/pynacl/default.nix
+++ b/pkgs/development/python-modules/pynacl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/pynest2d/default.nix b/pkgs/development/python-modules/pynest2d/default.nix
index 6214f3db42b2..7ca72293382d 100644
--- a/pkgs/development/python-modules/pynest2d/default.nix
+++ b/pkgs/development/python-modules/pynest2d/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, python3, cmake
+{ lib, buildPythonPackage, fetchFromGitHub, python3, cmake
 , pythonOlder, libnest2d, sip, clipper }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pynisher/default.nix b/pkgs/development/python-modules/pynisher/default.nix
index 0ecac704e1e8..28e9922e1720 100644
--- a/pkgs/development/python-modules/pynisher/default.nix
+++ b/pkgs/development/python-modules/pynisher/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, psutil, docutils }:
+{ lib, buildPythonPackage, fetchPypi, psutil, docutils }:
 
 buildPythonPackage rec {
   pname = "pynisher";
diff --git a/pkgs/development/python-modules/pynzb/default.nix b/pkgs/development/python-modules/pynzb/default.nix
index 294c2374f537..3f1cca75dc15 100644
--- a/pkgs/development/python-modules/pynzb/default.nix
+++ b/pkgs/development/python-modules/pynzb/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , python
diff --git a/pkgs/development/python-modules/pyodbc/default.nix b/pkgs/development/python-modules/pyodbc/default.nix
index 2dec1d8705bb..8f2686a79145 100644
--- a/pkgs/development/python-modules/pyodbc/default.nix
+++ b/pkgs/development/python-modules/pyodbc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPyPy, unixODBC }:
+{ lib, buildPythonPackage, fetchPypi, isPyPy, unixODBC }:
 
 buildPythonPackage rec {
   pname = "pyodbc";
diff --git a/pkgs/development/python-modules/pyopencl/default.nix b/pkgs/development/python-modules/pyopencl/default.nix
index 4171eaeeb57e..cf881a580482 100644
--- a/pkgs/development/python-modules/pyopencl/default.nix
+++ b/pkgs/development/python-modules/pyopencl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchPypi
 , buildPythonPackage
 , Mako
diff --git a/pkgs/development/python-modules/pyopengl-accelerate/default.nix b/pkgs/development/python-modules/pyopengl-accelerate/default.nix
index 23de6b2323f0..c6839bba9896 100644
--- a/pkgs/development/python-modules/pyopengl-accelerate/default.nix
+++ b/pkgs/development/python-modules/pyopengl-accelerate/default.nix
@@ -1,7 +1,6 @@
-{ stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
-, lib
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pypandoc/default.nix b/pkgs/development/python-modules/pypandoc/default.nix
index ffe7bf014232..c54e220228ab 100644
--- a/pkgs/development/python-modules/pypandoc/default.nix
+++ b/pkgs/development/python-modules/pypandoc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, fetchpatch
+{ lib, buildPythonPackage, fetchFromGitHub, fetchpatch
 , pandoc, haskellPackages, texlive }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pypdf/default.nix b/pkgs/development/python-modules/pypdf/default.nix
index d69b1078aeef..1244f374b44c 100644
--- a/pkgs/development/python-modules/pypdf/default.nix
+++ b/pkgs/development/python-modules/pypdf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/pypdf2/default.nix b/pkgs/development/python-modules/pypdf2/default.nix
index cd91cc347a4f..26d27f4455af 100644
--- a/pkgs/development/python-modules/pypdf2/default.nix
+++ b/pkgs/development/python-modules/pypdf2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , glibcLocales
diff --git a/pkgs/development/python-modules/pypeg2/default.nix b/pkgs/development/python-modules/pypeg2/default.nix
index 1f16a307a0c1..8b630f743d19 100644
--- a/pkgs/development/python-modules/pypeg2/default.nix
+++ b/pkgs/development/python-modules/pypeg2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/pyphen/default.nix b/pkgs/development/python-modules/pyphen/default.nix
index d8b9abcf97a3..2f573b67838b 100644
--- a/pkgs/development/python-modules/pyphen/default.nix
+++ b/pkgs/development/python-modules/pyphen/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "Pyphen";
diff --git a/pkgs/development/python-modules/pypillowfight/default.nix b/pkgs/development/python-modules/pypillowfight/default.nix
index bc0e45359990..1fc4198ebeb6 100644
--- a/pkgs/development/python-modules/pypillowfight/default.nix
+++ b/pkgs/development/python-modules/pypillowfight/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitLab, nose, pillow
+{ lib, buildPythonPackage, fetchFromGitLab, nose, pillow
 , isPy3k, isPyPy
 }:
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pyplatec/default.nix b/pkgs/development/python-modules/pyplatec/default.nix
index 8747840fd7c0..0c8c6c4328af 100644
--- a/pkgs/development/python-modules/pyplatec/default.nix
+++ b/pkgs/development/python-modules/pyplatec/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/pypoppler/default.nix b/pkgs/development/python-modules/pypoppler/default.nix
index 83190bc292ab..348f91715022 100644
--- a/pkgs/development/python-modules/pypoppler/default.nix
+++ b/pkgs/development/python-modules/pypoppler/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/pyprind/default.nix b/pkgs/development/python-modules/pyprind/default.nix
index d270136558fc..9c13a9535701 100644
--- a/pkgs/development/python-modules/pyprind/default.nix
+++ b/pkgs/development/python-modules/pyprind/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage
+{ lib, fetchPypi, buildPythonPackage
 , psutil
 , pytest }:
 
diff --git a/pkgs/development/python-modules/pyptlib/default.nix b/pkgs/development/python-modules/pyptlib/default.nix
index af2575d21431..9f9f99884b98 100644
--- a/pkgs/development/python-modules/pyptlib/default.nix
+++ b/pkgs/development/python-modules/pyptlib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPyPy
diff --git a/pkgs/development/python-modules/pypugjs/default.nix b/pkgs/development/python-modules/pypugjs/default.nix
index b806177b4d7d..22ac89cf6a90 100644
--- a/pkgs/development/python-modules/pypugjs/default.nix
+++ b/pkgs/development/python-modules/pypugjs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, fetchpatch, six, chardet, nose
+{ lib, buildPythonPackage, fetchPypi, fetchpatch, six, chardet, nose
 , django, jinja2, tornado, pyramid, pyramid_mako, Mako }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pyqtgraph/default.nix b/pkgs/development/python-modules/pyqtgraph/default.nix
index 98b30b247077..f43bfb9aaa6e 100644
--- a/pkgs/development/python-modules/pyqtgraph/default.nix
+++ b/pkgs/development/python-modules/pyqtgraph/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , numpy
diff --git a/pkgs/development/python-modules/pyquery/default.nix b/pkgs/development/python-modules/pyquery/default.nix
index 2496d9d968fc..2bb2eb1c6fcc 100644
--- a/pkgs/development/python-modules/pyquery/default.nix
+++ b/pkgs/development/python-modules/pyquery/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , cssselect
diff --git a/pkgs/development/python-modules/pyramid/default.nix b/pkgs/development/python-modules/pyramid/default.nix
index 5f1e5c7d75a8..44ac5a9221ad 100644
--- a/pkgs/development/python-modules/pyramid/default.nix
+++ b/pkgs/development/python-modules/pyramid/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , webtest
diff --git a/pkgs/development/python-modules/pyramid_beaker/default.nix b/pkgs/development/python-modules/pyramid_beaker/default.nix
index 88dc62886fc6..5c4e7c104bf0 100644
--- a/pkgs/development/python-modules/pyramid_beaker/default.nix
+++ b/pkgs/development/python-modules/pyramid_beaker/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest, beaker, pyramid }:
+{ lib, buildPythonPackage, fetchPypi, pytest, beaker, pyramid }:
 
 buildPythonPackage rec {
   pname = "pyramid_beaker";
diff --git a/pkgs/development/python-modules/pyramid_chameleon/default.nix b/pkgs/development/python-modules/pyramid_chameleon/default.nix
index 2bb5a03bdb91..d3388fdff359 100644
--- a/pkgs/development/python-modules/pyramid_chameleon/default.nix
+++ b/pkgs/development/python-modules/pyramid_chameleon/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , chameleon
diff --git a/pkgs/development/python-modules/pyramid_exclog/default.nix b/pkgs/development/python-modules/pyramid_exclog/default.nix
index 80514cc91b48..55da77f49644 100644
--- a/pkgs/development/python-modules/pyramid_exclog/default.nix
+++ b/pkgs/development/python-modules/pyramid_exclog/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pyramid
diff --git a/pkgs/development/python-modules/pyramid_hawkauth/default.nix b/pkgs/development/python-modules/pyramid_hawkauth/default.nix
index ab4025b72309..f2f156e98b67 100644
--- a/pkgs/development/python-modules/pyramid_hawkauth/default.nix
+++ b/pkgs/development/python-modules/pyramid_hawkauth/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , pyramid
diff --git a/pkgs/development/python-modules/pyramid_jinja2/default.nix b/pkgs/development/python-modules/pyramid_jinja2/default.nix
index 0497ab79613f..464d8d209bfb 100644
--- a/pkgs/development/python-modules/pyramid_jinja2/default.nix
+++ b/pkgs/development/python-modules/pyramid_jinja2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , webtest
diff --git a/pkgs/development/python-modules/pyramid_mako/default.nix b/pkgs/development/python-modules/pyramid_mako/default.nix
index 8c71563e2d77..2f8c5e1e0753 100644
--- a/pkgs/development/python-modules/pyramid_mako/default.nix
+++ b/pkgs/development/python-modules/pyramid_mako/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , webtest
diff --git a/pkgs/development/python-modules/pyramid_multiauth/default.nix b/pkgs/development/python-modules/pyramid_multiauth/default.nix
index 9167918fc47d..545883a25c1a 100644
--- a/pkgs/development/python-modules/pyramid_multiauth/default.nix
+++ b/pkgs/development/python-modules/pyramid_multiauth/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pyramid
diff --git a/pkgs/development/python-modules/pyreport/default.nix b/pkgs/development/python-modules/pyreport/default.nix
index 09a1e7c6b418..6b9649699ba3 100644
--- a/pkgs/development/python-modules/pyreport/default.nix
+++ b/pkgs/development/python-modules/pyreport/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/pyres/default.nix b/pkgs/development/python-modules/pyres/default.nix
index 6d49bd025948..b1d5f4efb090 100644
--- a/pkgs/development/python-modules/pyres/default.nix
+++ b/pkgs/development/python-modules/pyres/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, fetchFromGitHub, simplejson, redis, setproctitle, nose, pkgs }:
+{ lib, fetchPypi, buildPythonPackage, fetchFromGitHub, simplejson, redis, setproctitle, nose, pkgs }:
 
 let
 
diff --git a/pkgs/development/python-modules/pyrfc3339/default.nix b/pkgs/development/python-modules/pyrfc3339/default.nix
index f6be3c4c8974..9885d4f5443f 100644
--- a/pkgs/development/python-modules/pyrfc3339/default.nix
+++ b/pkgs/development/python-modules/pyrfc3339/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytz
diff --git a/pkgs/development/python-modules/pyro4/default.nix b/pkgs/development/python-modules/pyro4/default.nix
index a84b22e06567..626560d89b6d 100644
--- a/pkgs/development/python-modules/pyro4/default.nix
+++ b/pkgs/development/python-modules/pyro4/default.nix
@@ -1,7 +1,6 @@
-{ stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
-, lib
 , python
 , serpent
 , dill
diff --git a/pkgs/development/python-modules/pyroma/default.nix b/pkgs/development/python-modules/pyroma/default.nix
index e533f6501697..bddf2413970c 100644
--- a/pkgs/development/python-modules/pyroma/default.nix
+++ b/pkgs/development/python-modules/pyroma/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , docutils, pygments, setuptools
 }:
 
diff --git a/pkgs/development/python-modules/pyroute2/default.nix b/pkgs/development/python-modules/pyroute2/default.nix
index f2378863720c..e5c87a94b074 100644
--- a/pkgs/development/python-modules/pyroute2/default.nix
+++ b/pkgs/development/python-modules/pyroute2/default.nix
@@ -1,4 +1,4 @@
-{lib, stdenv, buildPythonPackage, fetchPypi}:
+{lib, buildPythonPackage, fetchPypi}:
 
 buildPythonPackage rec {
   pname = "pyroute2";
diff --git a/pkgs/development/python-modules/pyrr/default.nix b/pkgs/development/python-modules/pyrr/default.nix
index f8ac5d8e8675..cb1da5238681 100644
--- a/pkgs/development/python-modules/pyrr/default.nix
+++ b/pkgs/development/python-modules/pyrr/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , setuptools
diff --git a/pkgs/development/python-modules/pyrsistent/default.nix b/pkgs/development/python-modules/pyrsistent/default.nix
index 211bc85f5112..79f6666474e6 100644
--- a/pkgs/development/python-modules/pyrsistent/default.nix
+++ b/pkgs/development/python-modules/pyrsistent/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/pyrss2gen/default.nix b/pkgs/development/python-modules/pyrss2gen/default.nix
index e3586e6dbf1c..4a7dc788caaa 100644
--- a/pkgs/development/python-modules/pyrss2gen/default.nix
+++ b/pkgs/development/python-modules/pyrss2gen/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/pysaml2/default.nix b/pkgs/development/python-modules/pysaml2/default.nix
index 7d2fdb5b4260..2ffbb97223f0 100644
--- a/pkgs/development/python-modules/pysaml2/default.nix
+++ b/pkgs/development/python-modules/pysaml2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , isPy3k
 , fetchFromGitHub
diff --git a/pkgs/development/python-modules/pyscss/default.nix b/pkgs/development/python-modules/pyscss/default.nix
index 6da19bc48ab8..e4e7791fa79a 100644
--- a/pkgs/development/python-modules/pyscss/default.nix
+++ b/pkgs/development/python-modules/pyscss/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , pytest
diff --git a/pkgs/development/python-modules/pysendfile/default.nix b/pkgs/development/python-modules/pysendfile/default.nix
index a35f2ae77f02..1a7c783e8291 100644
--- a/pkgs/development/python-modules/pysendfile/default.nix
+++ b/pkgs/development/python-modules/pysendfile/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , python
diff --git a/pkgs/development/python-modules/pysensors/default.nix b/pkgs/development/python-modules/pysensors/default.nix
index 214412c4ceed..8cff62b89c1f 100644
--- a/pkgs/development/python-modules/pysensors/default.nix
+++ b/pkgs/development/python-modules/pysensors/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, python, fetchFromGitHub, lm_sensors }:
+{ lib, buildPythonPackage, python, fetchFromGitHub, lm_sensors }:
 buildPythonPackage {
   version = "2017-07-13";
   pname = "pysensors";
diff --git a/pkgs/development/python-modules/pyserial-asyncio/default.nix b/pkgs/development/python-modules/pyserial-asyncio/default.nix
index ff3d624490ba..54f3f80a3f8f 100644
--- a/pkgs/development/python-modules/pyserial-asyncio/default.nix
+++ b/pkgs/development/python-modules/pyserial-asyncio/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k
+{ lib, buildPythonPackage, fetchPypi, isPy3k
 , pyserial }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pysftp/default.nix b/pkgs/development/python-modules/pysftp/default.nix
index 28daf6b385e6..3333a30bd1ac 100644
--- a/pkgs/development/python-modules/pysftp/default.nix
+++ b/pkgs/development/python-modules/pysftp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPyPy
diff --git a/pkgs/development/python-modules/pyshp/default.nix b/pkgs/development/python-modules/pyshp/default.nix
index 661c70a0ab26..7f494e98ad22 100644
--- a/pkgs/development/python-modules/pyshp/default.nix
+++ b/pkgs/development/python-modules/pyshp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , setuptools }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pysigset/default.nix b/pkgs/development/python-modules/pysigset/default.nix
index 8e31735db2e4..ccacb412924f 100644
--- a/pkgs/development/python-modules/pysigset/default.nix
+++ b/pkgs/development/python-modules/pysigset/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "pysigset";
diff --git a/pkgs/development/python-modules/pysmbc/default.nix b/pkgs/development/python-modules/pysmbc/default.nix
index 6834a78f4286..bea1438f6794 100644
--- a/pkgs/development/python-modules/pysmbc/default.nix
+++ b/pkgs/development/python-modules/pysmbc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , samba, pkg-config
 , setuptools }:
 
diff --git a/pkgs/development/python-modules/pysmf/default.nix b/pkgs/development/python-modules/pysmf/default.nix
index 02559510100c..25f5fc6a20ca 100644
--- a/pkgs/development/python-modules/pysmf/default.nix
+++ b/pkgs/development/python-modules/pysmf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pkg-config, libsmf, glib, pytest }:
+{ lib, buildPythonPackage, fetchPypi, pkg-config, libsmf, glib, pytest }:
 
 buildPythonPackage rec {
   pname = "pysmf";
diff --git a/pkgs/development/python-modules/pysmi/default.nix b/pkgs/development/python-modules/pysmi/default.nix
index 953581aa3029..7b96b97f0bb9 100644
--- a/pkgs/development/python-modules/pysmi/default.nix
+++ b/pkgs/development/python-modules/pysmi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , ply
diff --git a/pkgs/development/python-modules/pysnmp/default.nix b/pkgs/development/python-modules/pysnmp/default.nix
index 7dce4d9b4d18..0b0e298d5d00 100644
--- a/pkgs/development/python-modules/pysnmp/default.nix
+++ b/pkgs/development/python-modules/pysnmp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pyasn1
diff --git a/pkgs/development/python-modules/pysocks/default.nix b/pkgs/development/python-modules/pysocks/default.nix
index 79c163726b76..70fb74ab4ddf 100644
--- a/pkgs/development/python-modules/pysocks/default.nix
+++ b/pkgs/development/python-modules/pysocks/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/pyspark/default.nix b/pkgs/development/python-modules/pyspark/default.nix
index 342755131a3d..f8a7c09b4071 100644
--- a/pkgs/development/python-modules/pyspark/default.nix
+++ b/pkgs/development/python-modules/pyspark/default.nix
@@ -1,4 +1,4 @@
-{ buildPythonPackage, fetchPypi, lib, stdenv, py4j }:
+{ buildPythonPackage, fetchPypi, lib, py4j }:
 
 buildPythonPackage rec {
   pname = "pyspark";
diff --git a/pkgs/development/python-modules/pysqueezebox/default.nix b/pkgs/development/python-modules/pysqueezebox/default.nix
index 7c5d8ca5abf5..8445f6d7e89e 100644
--- a/pkgs/development/python-modules/pysqueezebox/default.nix
+++ b/pkgs/development/python-modules/pysqueezebox/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, pythonOlder, aiohttp }:
+{ lib, fetchPypi, buildPythonPackage, pythonOlder, aiohttp }:
 
 buildPythonPackage rec {
   pname = "pysqueezebox";
diff --git a/pkgs/development/python-modules/pysrt/default.nix b/pkgs/development/python-modules/pysrt/default.nix
index 4012a7324660..1099bffc40f0 100644
--- a/pkgs/development/python-modules/pysrt/default.nix
+++ b/pkgs/development/python-modules/pysrt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , chardet
diff --git a/pkgs/development/python-modules/pyssim/default.nix b/pkgs/development/python-modules/pyssim/default.nix
index 4f73ada61af6..cdbbfeabf887 100644
--- a/pkgs/development/python-modules/pyssim/default.nix
+++ b/pkgs/development/python-modules/pyssim/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, numpy, scipy, pillow }:
+{ lib, buildPythonPackage, fetchFromGitHub, numpy, scipy, pillow }:
 
 buildPythonPackage rec {
   pname = "pyssim";
diff --git a/pkgs/development/python-modules/pystache/default.nix b/pkgs/development/python-modules/pystache/default.nix
index 6ed036aecb1a..c93655e10a8e 100644
--- a/pkgs/development/python-modules/pystache/default.nix
+++ b/pkgs/development/python-modules/pystache/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, python, fetchPypi, isPy3k, glibcLocales }:
+{ lib, buildPythonPackage, python, fetchPypi, isPy3k, glibcLocales }:
 
 buildPythonPackage rec {
   pname = "pystache";
diff --git a/pkgs/development/python-modules/pystemd/default.nix b/pkgs/development/python-modules/pystemd/default.nix
index 691865919490..e77dd605388a 100644
--- a/pkgs/development/python-modules/pystemd/default.nix
+++ b/pkgs/development/python-modules/pystemd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python, systemd }:
+{ lib, python, systemd }:
 
 python.pkgs.buildPythonPackage rec {
   pname = "pystemd";
diff --git a/pkgs/development/python-modules/pystemmer/default.nix b/pkgs/development/python-modules/pystemmer/default.nix
index 0ba23ffec5df..120867f389cc 100644
--- a/pkgs/development/python-modules/pystemmer/default.nix
+++ b/pkgs/development/python-modules/pystemmer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python, fetchPypi, buildPythonPackage, cython }:
+{ lib, python, fetchPypi, buildPythonPackage, cython }:
 
 buildPythonPackage rec {
   pname = "PyStemmer";
diff --git a/pkgs/development/python-modules/pytabix/default.nix b/pkgs/development/python-modules/pytabix/default.nix
index db8437d8957c..fb2e622eac9c 100644
--- a/pkgs/development/python-modules/pytabix/default.nix
+++ b/pkgs/development/python-modules/pytabix/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , isPy3k
 , fetchPypi
diff --git a/pkgs/development/python-modules/pytado/default.nix b/pkgs/development/python-modules/pytado/default.nix
index 636210c93d59..a54c89f348dd 100644
--- a/pkgs/development/python-modules/pytado/default.nix
+++ b/pkgs/development/python-modules/pytado/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub }:
+{ lib, buildPythonPackage, fetchFromGitHub }:
 
 buildPythonPackage rec {
   pname = "PyTado";
diff --git a/pkgs/development/python-modules/pyte/default.nix b/pkgs/development/python-modules/pyte/default.nix
index 65d3d9218d06..e930f1d5717f 100644
--- a/pkgs/development/python-modules/pyte/default.nix
+++ b/pkgs/development/python-modules/pyte/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest, pytestrunner, wcwidth }:
+{ lib, buildPythonPackage, fetchPypi, pytest, pytestrunner, wcwidth }:
 
 buildPythonPackage rec {
   pname = "pyte";
diff --git a/pkgs/development/python-modules/pytest-aiohttp/default.nix b/pkgs/development/python-modules/pytest-aiohttp/default.nix
index 7384eb360704..fad9a70af0ff 100644
--- a/pkgs/development/python-modules/pytest-aiohttp/default.nix
+++ b/pkgs/development/python-modules/pytest-aiohttp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest, aiohttp }:
+{ lib, buildPythonPackage, fetchPypi, pytest, aiohttp }:
 
 buildPythonPackage rec {
   pname = "pytest-aiohttp";
diff --git a/pkgs/development/python-modules/pytest-annotate/default.nix b/pkgs/development/python-modules/pytest-annotate/default.nix
index 1a7f77bf9b6e..68b67f061bb1 100644
--- a/pkgs/development/python-modules/pytest-annotate/default.nix
+++ b/pkgs/development/python-modules/pytest-annotate/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pyannotate
diff --git a/pkgs/development/python-modules/pytest-ansible/default.nix b/pkgs/development/python-modules/pytest-ansible/default.nix
index 309a33e89073..4ca6bdac6e96 100644
--- a/pkgs/development/python-modules/pytest-ansible/default.nix
+++ b/pkgs/development/python-modules/pytest-ansible/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , ansible
diff --git a/pkgs/development/python-modules/pytest-asyncio/default.nix b/pkgs/development/python-modules/pytest-asyncio/default.nix
index c621d9a47854..0f37d09a9e07 100644
--- a/pkgs/development/python-modules/pytest-asyncio/default.nix
+++ b/pkgs/development/python-modules/pytest-asyncio/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest, isPy3k, isPy35, async_generator }:
+{ lib, buildPythonPackage, fetchPypi, pytest, isPy3k, isPy35, async_generator }:
 buildPythonPackage rec {
   pname = "pytest-asyncio";
   version = "0.14.0";
diff --git a/pkgs/development/python-modules/pytest-bdd/default.nix b/pkgs/development/python-modules/pytest-bdd/default.nix
index 493a2307e7e7..83757c2e1665 100644
--- a/pkgs/development/python-modules/pytest-bdd/default.nix
+++ b/pkgs/development/python-modules/pytest-bdd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub
+{ lib, buildPythonPackage, fetchFromGitHub
 , execnet
 , glob2
 , Mako
diff --git a/pkgs/development/python-modules/pytest-catchlog/default.nix b/pkgs/development/python-modules/pytest-catchlog/default.nix
index 2fb02244d1d7..39c26a3e0f36 100644
--- a/pkgs/development/python-modules/pytest-catchlog/default.nix
+++ b/pkgs/development/python-modules/pytest-catchlog/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest, unzip }:
+{ lib, buildPythonPackage, fetchPypi, pytest, unzip }:
 
 buildPythonPackage rec {
   pname = "pytest-catchlog";
diff --git a/pkgs/development/python-modules/pytest-celery/default.nix b/pkgs/development/python-modules/pytest-celery/default.nix
index 034c657b5b0f..414cf1ecc9cb 100644
--- a/pkgs/development/python-modules/pytest-celery/default.nix
+++ b/pkgs/development/python-modules/pytest-celery/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest, setuptools_scm }:
+{ lib, buildPythonPackage, fetchPypi, pytest, setuptools_scm }:
 
 buildPythonPackage rec {
   pname = "pytest-celery";
diff --git a/pkgs/development/python-modules/pytest-check/default.nix b/pkgs/development/python-modules/pytest-check/default.nix
index 41f316a18a65..a0ae504746d5 100644
--- a/pkgs/development/python-modules/pytest-check/default.nix
+++ b/pkgs/development/python-modules/pytest-check/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/pytest-cov/default.nix b/pkgs/development/python-modules/pytest-cov/default.nix
index aa921ddeb3d1..003d7e14ab59 100644
--- a/pkgs/development/python-modules/pytest-cov/default.nix
+++ b/pkgs/development/python-modules/pytest-cov/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , pytest, coverage }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pytest-datadir/default.nix b/pkgs/development/python-modules/pytest-datadir/default.nix
index b1cdb1033a64..1dc218c08085 100644
--- a/pkgs/development/python-modules/pytest-datadir/default.nix
+++ b/pkgs/development/python-modules/pytest-datadir/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub
+{ lib, buildPythonPackage, fetchFromGitHub
 , setuptools_scm, pytest, cmake
 }:
 
diff --git a/pkgs/development/python-modules/pytest-datafiles/default.nix b/pkgs/development/python-modules/pytest-datafiles/default.nix
index bc6e2441b0f0..bdcab2788ae4 100644
--- a/pkgs/development/python-modules/pytest-datafiles/default.nix
+++ b/pkgs/development/python-modules/pytest-datafiles/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, py, pytest }:
+{ lib, buildPythonPackage, fetchPypi, py, pytest }:
 
 buildPythonPackage rec {
   pname = "pytest-datafiles";
diff --git a/pkgs/development/python-modules/pytest-dependency/default.nix b/pkgs/development/python-modules/pytest-dependency/default.nix
index 9a3dbed55b15..7108a8f4c176 100644
--- a/pkgs/development/python-modules/pytest-dependency/default.nix
+++ b/pkgs/development/python-modules/pytest-dependency/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, fetchpatch, pytest }:
+{ lib, buildPythonPackage, fetchPypi, fetchpatch, pytest }:
 
 buildPythonPackage rec {
   version = "0.5.1";
diff --git a/pkgs/development/python-modules/pytest-django/default.nix b/pkgs/development/python-modules/pytest-django/default.nix
index 069aa2812eb5..bfcda812529e 100644
--- a/pkgs/development/python-modules/pytest-django/default.nix
+++ b/pkgs/development/python-modules/pytest-django/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/pytest-fixture-config/default.nix b/pkgs/development/python-modules/pytest-fixture-config/default.nix
index 061f62bfc17b..32392f8f14ce 100644
--- a/pkgs/development/python-modules/pytest-fixture-config/default.nix
+++ b/pkgs/development/python-modules/pytest-fixture-config/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , setuptools-git, pytest }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pytest-flakes/default.nix b/pkgs/development/python-modules/pytest-flakes/default.nix
index fd4ed0978060..805c19751ed1 100644
--- a/pkgs/development/python-modules/pytest-flakes/default.nix
+++ b/pkgs/development/python-modules/pytest-flakes/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pythonOlder
+{ lib, buildPythonPackage, fetchPypi, pythonOlder
 , pytest
 , pyflakes
 }:
diff --git a/pkgs/development/python-modules/pytest-flask/default.nix b/pkgs/development/python-modules/pytest-flask/default.nix
index 74e33a7731b3..7b459b4a294c 100644
--- a/pkgs/development/python-modules/pytest-flask/default.nix
+++ b/pkgs/development/python-modules/pytest-flask/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest, flask, werkzeug, setuptools_scm, isPy27 }:
+{ lib, buildPythonPackage, fetchPypi, pytest, flask, werkzeug, setuptools_scm, isPy27 }:
 
 buildPythonPackage rec {
   pname = "pytest-flask";
diff --git a/pkgs/development/python-modules/pytest-helpers-namespace/default.nix b/pkgs/development/python-modules/pytest-helpers-namespace/default.nix
index 41263ce692b3..c634aa00718e 100644
--- a/pkgs/development/python-modules/pytest-helpers-namespace/default.nix
+++ b/pkgs/development/python-modules/pytest-helpers-namespace/default.nix
@@ -1,7 +1,7 @@
 { buildPythonPackage
 , fetchFromGitHub
 , pytest
-, lib, stdenv
+, lib
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pytest-html/default.nix b/pkgs/development/python-modules/pytest-html/default.nix
index 0b1090f7b81d..1b09d6863b97 100644
--- a/pkgs/development/python-modules/pytest-html/default.nix
+++ b/pkgs/development/python-modules/pytest-html/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pythonOlder
+{ lib, buildPythonPackage, fetchPypi, pythonOlder
 , pytest, pytest-metadata, setuptools_scm }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pytest-metadata/default.nix b/pkgs/development/python-modules/pytest-metadata/default.nix
index e8b224dc1d4d..f7766003be10 100644
--- a/pkgs/development/python-modules/pytest-metadata/default.nix
+++ b/pkgs/development/python-modules/pytest-metadata/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , pytest, setuptools_scm }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pytest-mpl/default.nix b/pkgs/development/python-modules/pytest-mpl/default.nix
index 0cc3a993c235..30a2757ecf32 100644
--- a/pkgs/development/python-modules/pytest-mpl/default.nix
+++ b/pkgs/development/python-modules/pytest-mpl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/pytest-pep257/default.nix b/pkgs/development/python-modules/pytest-pep257/default.nix
index eb5203c02466..827386786b79 100644
--- a/pkgs/development/python-modules/pytest-pep257/default.nix
+++ b/pkgs/development/python-modules/pytest-pep257/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest, pep257 }:
+{ lib, buildPythonPackage, fetchPypi, pytest, pep257 }:
 
 buildPythonPackage rec {
   pname = "pytest-pep257";
diff --git a/pkgs/development/python-modules/pytest-quickcheck/default.nix b/pkgs/development/python-modules/pytest-quickcheck/default.nix
index 5148fa4b7608..4e08a8fabba0 100644
--- a/pkgs/development/python-modules/pytest-quickcheck/default.nix
+++ b/pkgs/development/python-modules/pytest-quickcheck/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest, pytest-flakes, tox }:
+{ lib, buildPythonPackage, fetchPypi, pytest, pytest-flakes, tox }:
 buildPythonPackage rec {
   pname = "pytest-quickcheck";
   version = "0.8.6";
diff --git a/pkgs/development/python-modules/pytest-raisesregexp/default.nix b/pkgs/development/python-modules/pytest-raisesregexp/default.nix
index 0d02a25ec3c7..78b99714378f 100644
--- a/pkgs/development/python-modules/pytest-raisesregexp/default.nix
+++ b/pkgs/development/python-modules/pytest-raisesregexp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , py, pytest }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pytest-random-order/default.nix b/pkgs/development/python-modules/pytest-random-order/default.nix
index 2def886c5cba..d84bb3c9acf9 100644
--- a/pkgs/development/python-modules/pytest-random-order/default.nix
+++ b/pkgs/development/python-modules/pytest-random-order/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
diff --git a/pkgs/development/python-modules/pytest-relaxed/default.nix b/pkgs/development/python-modules/pytest-relaxed/default.nix
index 401307039e55..19d031b6a2b1 100644
--- a/pkgs/development/python-modules/pytest-relaxed/default.nix
+++ b/pkgs/development/python-modules/pytest-relaxed/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/pytest-rerunfailures/default.nix b/pkgs/development/python-modules/pytest-rerunfailures/default.nix
index 537f32316a31..1bd91fe70f78 100644
--- a/pkgs/development/python-modules/pytest-rerunfailures/default.nix
+++ b/pkgs/development/python-modules/pytest-rerunfailures/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, pythonOlder, fetchPypi, pytest, mock }:
+{ lib, buildPythonPackage, pythonOlder, fetchPypi, pytest, mock }:
 
 buildPythonPackage rec {
   pname = "pytest-rerunfailures";
diff --git a/pkgs/development/python-modules/pytest-server-fixtures/default.nix b/pkgs/development/python-modules/pytest-server-fixtures/default.nix
index 41fcfc7b1597..ca3c9a37c1a9 100644
--- a/pkgs/development/python-modules/pytest-server-fixtures/default.nix
+++ b/pkgs/development/python-modules/pytest-server-fixtures/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , pytest, pytest-shutil, pytest-fixture-config, psutil
 , requests, future, retry }:
 
diff --git a/pkgs/development/python-modules/pytest-shutil/default.nix b/pkgs/development/python-modules/pytest-shutil/default.nix
index 3edafdfb4734..9d088e44f8d7 100644
--- a/pkgs/development/python-modules/pytest-shutil/default.nix
+++ b/pkgs/development/python-modules/pytest-shutil/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, isPyPy, buildPythonPackage, fetchPypi
+{ lib, isPyPy, buildPythonPackage, fetchPypi
 , pytest, cmdline, pytestcov, coverage, setuptools-git, mock, pathpy, execnet
 , contextlib2, termcolor }:
 
diff --git a/pkgs/development/python-modules/pytest-subtesthack/default.nix b/pkgs/development/python-modules/pytest-subtesthack/default.nix
index f7454ee644ca..5006ac51150f 100644
--- a/pkgs/development/python-modules/pytest-subtesthack/default.nix
+++ b/pkgs/development/python-modules/pytest-subtesthack/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest }:
+{ lib, buildPythonPackage, fetchPypi, pytest }:
 
 buildPythonPackage rec {
   pname = "pytest-subtesthack";
diff --git a/pkgs/development/python-modules/pytest-virtualenv/default.nix b/pkgs/development/python-modules/pytest-virtualenv/default.nix
index a910bf3245f4..8ea981ba2e7a 100644
--- a/pkgs/development/python-modules/pytest-virtualenv/default.nix
+++ b/pkgs/development/python-modules/pytest-virtualenv/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , pytest, pytestcov, mock, cmdline, pytest-fixture-config, pytest-shutil, virtualenv }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pytest-xdist/1.nix b/pkgs/development/python-modules/pytest-xdist/1.nix
index 0c5ae06e8611..fa794f94141a 100644
--- a/pkgs/development/python-modules/pytest-xdist/1.nix
+++ b/pkgs/development/python-modules/pytest-xdist/1.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, execnet, pytest
+{ lib, fetchPypi, buildPythonPackage, execnet, pytest
 , setuptools_scm, pytest-forked, filelock, psutil, six, isPy3k }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pytest-xdist/default.nix b/pkgs/development/python-modules/pytest-xdist/default.nix
index e5019f842fee..30e43c17c919 100644
--- a/pkgs/development/python-modules/pytest-xdist/default.nix
+++ b/pkgs/development/python-modules/pytest-xdist/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, execnet, pytest_6
+{ lib, fetchPypi, buildPythonPackage, execnet, pytest_6
 , setuptools_scm, pytest-forked, filelock, psutil, six, isPy3k }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pytest/4.nix b/pkgs/development/python-modules/pytest/4.nix
index 63e57a7f769b..f30eec15a0a8 100644
--- a/pkgs/development/python-modules/pytest/4.nix
+++ b/pkgs/development/python-modules/pytest/4.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, pythonOlder, fetchPypi, attrs, hypothesis, py
+{ lib, buildPythonPackage, pythonOlder, fetchPypi, attrs, hypothesis, py
 , setuptools_scm, setuptools, six, pluggy, funcsigs, isPy3k, more-itertools
 , atomicwrites, mock, writeText, pathlib2, wcwidth, packaging, isPyPy
 }:
diff --git a/pkgs/development/python-modules/pytest/5.nix b/pkgs/development/python-modules/pytest/5.nix
index 1293cc94b0f1..341d5ac2240d 100644
--- a/pkgs/development/python-modules/pytest/5.nix
+++ b/pkgs/development/python-modules/pytest/5.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, pythonOlder, fetchPypi, isPy3k, isPyPy
+{ lib, buildPythonPackage, pythonOlder, fetchPypi, isPy3k, isPyPy
 , atomicwrites
 , attrs
 , funcsigs
diff --git a/pkgs/development/python-modules/pytest/default.nix b/pkgs/development/python-modules/pytest/default.nix
index 6f5c99a99b19..798084d11117 100644
--- a/pkgs/development/python-modules/pytest/default.nix
+++ b/pkgs/development/python-modules/pytest/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, pythonOlder, fetchPypi, isPy3k, isPyPy
+{ lib, buildPythonPackage, pythonOlder, fetchPypi, isPy3k, isPyPy
 , atomicwrites
 , attrs
 , funcsigs
diff --git a/pkgs/development/python-modules/pytestcache/default.nix b/pkgs/development/python-modules/pytestcache/default.nix
index 877e357d9469..cf8643db06d1 100644
--- a/pkgs/development/python-modules/pytestcache/default.nix
+++ b/pkgs/development/python-modules/pytestcache/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , pytest, execnet }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pytestrunner/default.nix b/pkgs/development/python-modules/pytestrunner/default.nix
index 7fd901babd0b..d6203276b827 100644
--- a/pkgs/development/python-modules/pytestrunner/default.nix
+++ b/pkgs/development/python-modules/pytestrunner/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, setuptools_scm, pytest }:
+{ lib, buildPythonPackage, fetchPypi, setuptools_scm, pytest }:
 
 buildPythonPackage rec {
   pname = "pytest-runner";
diff --git a/pkgs/development/python-modules/python-doi/default.nix b/pkgs/development/python-modules/python-doi/default.nix
index 7e94f743da46..e0cb03d611d1 100644
--- a/pkgs/development/python-modules/python-doi/default.nix
+++ b/pkgs/development/python-modules/python-doi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, isPy3k }:
+{ lib, buildPythonPackage, fetchFromGitHub, isPy3k }:
 
 buildPythonPackage rec {
   pname = "python-doi";
diff --git a/pkgs/development/python-modules/python-editor/default.nix b/pkgs/development/python-modules/python-editor/default.nix
index 19efcb89d3d3..212e191568c3 100644
--- a/pkgs/development/python-modules/python-editor/default.nix
+++ b/pkgs/development/python-modules/python-editor/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   version = "1.0.4";
diff --git a/pkgs/development/python-modules/python-efl/default.nix b/pkgs/development/python-modules/python-efl/default.nix
index 44e35a186e21..293d97712808 100644
--- a/pkgs/development/python-modules/python-efl/default.nix
+++ b/pkgs/development/python-modules/python-efl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchurl
 , buildPythonPackage
 , pkg-config
diff --git a/pkgs/development/python-modules/python-etcd/default.nix b/pkgs/development/python-modules/python-etcd/default.nix
index f4305473797c..f9b01802c421 100644
--- a/pkgs/development/python-modules/python-etcd/default.nix
+++ b/pkgs/development/python-modules/python-etcd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/python-forecastio/default.nix b/pkgs/development/python-modules/python-forecastio/default.nix
index 392c5c2126d3..991ec3279dec 100644
--- a/pkgs/development/python-modules/python-forecastio/default.nix
+++ b/pkgs/development/python-modules/python-forecastio/default.nix
@@ -1,4 +1,4 @@
-{ buildPythonPackage, lib, stdenv, fetchPypi
+{ buildPythonPackage, lib, fetchPypi
 , requests
 , nose
 , responses
diff --git a/pkgs/development/python-modules/python-frontmatter/default.nix b/pkgs/development/python-modules/python-frontmatter/default.nix
index 661ea4ba2493..6c6806f043ce 100644
--- a/pkgs/development/python-modules/python-frontmatter/default.nix
+++ b/pkgs/development/python-modules/python-frontmatter/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 python3Packages.buildPythonPackage rec {
   pname = "python-frontmatter";
diff --git a/pkgs/development/python-modules/python-gitlab/default.nix b/pkgs/development/python-modules/python-gitlab/default.nix
index c706ff7903c3..1a2e28d57aba 100644
--- a/pkgs/development/python-modules/python-gitlab/default.nix
+++ b/pkgs/development/python-modules/python-gitlab/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, requests, mock, httmock, pythonOlder, pytest, responses }:
+{ lib, buildPythonPackage, fetchPypi, requests, mock, httmock, pythonOlder, pytest, responses }:
 
 buildPythonPackage rec {
   pname = "python-gitlab";
diff --git a/pkgs/development/python-modules/python-gnupg/default.nix b/pkgs/development/python-modules/python-gnupg/default.nix
index 36ca3a719061..fe6867611070 100644
--- a/pkgs/development/python-modules/python-gnupg/default.nix
+++ b/pkgs/development/python-modules/python-gnupg/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, gnupg }:
+{ lib, buildPythonPackage, fetchPypi, gnupg }:
 
 buildPythonPackage rec {
   pname   = "python-gnupg";
diff --git a/pkgs/development/python-modules/python-hosts/default.nix b/pkgs/development/python-modules/python-hosts/default.nix
index 238b9b9e4afa..c8f1179bc66b 100644
--- a/pkgs/development/python-modules/python-hosts/default.nix
+++ b/pkgs/development/python-modules/python-hosts/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pyyaml, pytest, pytestcov }:
+{ lib, buildPythonPackage, fetchPypi, pyyaml, pytest, pytestcov }:
 
 buildPythonPackage rec {
   pname = "python-hosts";
diff --git a/pkgs/development/python-modules/python-jose/default.nix b/pkgs/development/python-modules/python-jose/default.nix
index 0de220094c06..15c6474cc388 100644
--- a/pkgs/development/python-modules/python-jose/default.nix
+++ b/pkgs/development/python-modules/python-jose/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub
+{ lib, buildPythonPackage, fetchFromGitHub
 , future, six, ecdsa, rsa
 , pycrypto, pytestcov, pytestrunner, cryptography
 , pytestCheckHook
diff --git a/pkgs/development/python-modules/python-json-logger/default.nix b/pkgs/development/python-modules/python-json-logger/default.nix
index 96ce13ab265b..cb36bf50e18b 100644
--- a/pkgs/development/python-modules/python-json-logger/default.nix
+++ b/pkgs/development/python-modules/python-json-logger/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/python-jsonrpc-server/default.nix b/pkgs/development/python-modules/python-jsonrpc-server/default.nix
index 3a0ab33363ec..53dab817eb27 100644
--- a/pkgs/development/python-modules/python-jsonrpc-server/default.nix
+++ b/pkgs/development/python-modules/python-jsonrpc-server/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonPackage, fetchFromGitHub, pythonOlder
+{ lib, buildPythonPackage, fetchFromGitHub, pythonOlder
 , pytestCheckHook, mock, pytestcov, coverage
 , future, futures, ujson, isPy38
 }:
diff --git a/pkgs/development/python-modules/python-language-server/default.nix b/pkgs/development/python-modules/python-language-server/default.nix
index f22652d0f73c..b30542dacbd6 100644
--- a/pkgs/development/python-modules/python-language-server/default.nix
+++ b/pkgs/development/python-modules/python-language-server/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonPackage, fetchFromGitHub, pythonOlder, isPy27
+{ lib, buildPythonPackage, fetchFromGitHub, pythonOlder, isPy27
 , backports_functools_lru_cache, configparser, futures, future, jedi, pluggy, python-jsonrpc-server, flake8
 , pytestCheckHook, mock, pytestcov, coverage, setuptools, ujson, flaky
 , # Allow building a limited set of providers, e.g. ["pycodestyle"].
diff --git a/pkgs/development/python-modules/python-ldap-test/default.nix b/pkgs/development/python-modules/python-ldap-test/default.nix
index 94d8abd1fabd..379aaa5ab643 100644
--- a/pkgs/development/python-modules/python-ldap-test/default.nix
+++ b/pkgs/development/python-modules/python-ldap-test/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, py4j }:
+{ lib, buildPythonPackage, fetchPypi, py4j }:
 
 buildPythonPackage rec {
   pname = "python-ldap-test";
diff --git a/pkgs/development/python-modules/python-levenshtein/default.nix b/pkgs/development/python-modules/python-levenshtein/default.nix
index 60767e77e761..dda64a85fb26 100644
--- a/pkgs/development/python-modules/python-levenshtein/default.nix
+++ b/pkgs/development/python-modules/python-levenshtein/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/python-ly/default.nix b/pkgs/development/python-modules/python-ly/default.nix
index 6f83a7f61c75..cc38553a8176 100644
--- a/pkgs/development/python-modules/python-ly/default.nix
+++ b/pkgs/development/python-modules/python-ly/default.nix
@@ -1,4 +1,4 @@
-{ buildPythonPackage, fetchPypi, lib, stdenv }:
+{ buildPythonPackage, fetchPypi, lib }:
 
 buildPythonPackage rec {
   pname = "python-ly";
diff --git a/pkgs/development/python-modules/python-lzf/default.nix b/pkgs/development/python-modules/python-lzf/default.nix
index a1fd01134235..61194ff8f9cb 100644
--- a/pkgs/development/python-modules/python-lzf/default.nix
+++ b/pkgs/development/python-modules/python-lzf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   version = "0.2.4";
diff --git a/pkgs/development/python-modules/python-mapnik/default.nix b/pkgs/development/python-modules/python-mapnik/default.nix
index fe68ed60e372..36c297358e87 100644
--- a/pkgs/development/python-modules/python-mapnik/default.nix
+++ b/pkgs/development/python-modules/python-mapnik/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , isPyPy
 , python
diff --git a/pkgs/development/python-modules/python-miio/default.nix b/pkgs/development/python-modules/python-miio/default.nix
index 8321795c2fba..78c89408ac2d 100644
--- a/pkgs/development/python-modules/python-miio/default.nix
+++ b/pkgs/development/python-modules/python-miio/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , appdirs
diff --git a/pkgs/development/python-modules/python-mnist/default.nix b/pkgs/development/python-modules/python-mnist/default.nix
index a24f2a383a31..131c0f2f5acb 100644
--- a/pkgs/development/python-modules/python-mnist/default.nix
+++ b/pkgs/development/python-modules/python-mnist/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "python-mnist";
diff --git a/pkgs/development/python-modules/python-nomad/default.nix b/pkgs/development/python-modules/python-nomad/default.nix
index ba3ecd3883a4..4bb12ab7237c 100644
--- a/pkgs/development/python-modules/python-nomad/default.nix
+++ b/pkgs/development/python-modules/python-nomad/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, requests }:
+{ lib, buildPythonPackage, fetchPypi, requests }:
 
 buildPythonPackage rec {
   pname = "python-nomad";
diff --git a/pkgs/development/python-modules/python-otr/default.nix b/pkgs/development/python-modules/python-otr/default.nix
index 7a40998eebdc..6b657dba78df 100644
--- a/pkgs/development/python-modules/python-otr/default.nix
+++ b/pkgs/development/python-modules/python-otr/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , isPy3k
diff --git a/pkgs/development/python-modules/python-packer/default.nix b/pkgs/development/python-modules/python-packer/default.nix
index ba02ec84635f..2e2b59eb29d4 100644
--- a/pkgs/development/python-modules/python-packer/default.nix
+++ b/pkgs/development/python-modules/python-packer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, fetchpatch, sh }:
+{ lib, buildPythonPackage, fetchPypi, fetchpatch, sh }:
 
 buildPythonPackage rec {
   pname = "python-packer";
diff --git a/pkgs/development/python-modules/python-pipedrive/default.nix b/pkgs/development/python-modules/python-pipedrive/default.nix
index 6e0c0ef5788e..d776002b2129 100644
--- a/pkgs/development/python-modules/python-pipedrive/default.nix
+++ b/pkgs/development/python-modules/python-pipedrive/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , python
diff --git a/pkgs/development/python-modules/python-ptrace/default.nix b/pkgs/development/python-modules/python-ptrace/default.nix
index 2d81581c0cc1..1af58300c2f0 100644
--- a/pkgs/development/python-modules/python-ptrace/default.nix
+++ b/pkgs/development/python-modules/python-ptrace/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/python-rapidjson/default.nix b/pkgs/development/python-modules/python-rapidjson/default.nix
index c4cf0dc74255..4ef3b9f83790 100644
--- a/pkgs/development/python-modules/python-rapidjson/default.nix
+++ b/pkgs/development/python-modules/python-rapidjson/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
diff --git a/pkgs/development/python-modules/python-redis-lock/default.nix b/pkgs/development/python-modules/python-redis-lock/default.nix
index 235d085fffdb..7a53e73b2b88 100644
--- a/pkgs/development/python-modules/python-redis-lock/default.nix
+++ b/pkgs/development/python-modules/python-redis-lock/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , redis
diff --git a/pkgs/development/python-modules/python-simple-hipchat/default.nix b/pkgs/development/python-modules/python-simple-hipchat/default.nix
index 8ec7f6887ad4..3162a0326288 100644
--- a/pkgs/development/python-modules/python-simple-hipchat/default.nix
+++ b/pkgs/development/python-modules/python-simple-hipchat/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , unzip }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/python-slugify/default.nix b/pkgs/development/python-modules/python-slugify/default.nix
index 1860ff6d24d5..fd488f4be9d3 100644
--- a/pkgs/development/python-modules/python-slugify/default.nix
+++ b/pkgs/development/python-modules/python-slugify/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, python, text-unidecode }:
+{ lib, fetchPypi, buildPythonPackage, python, text-unidecode }:
 
 buildPythonPackage rec {
     pname = "python-slugify";
diff --git a/pkgs/development/python-modules/python-socketio/default.nix b/pkgs/development/python-modules/python-socketio/default.nix
index ee9a60301444..e9c2ae146b09 100644
--- a/pkgs/development/python-modules/python-socketio/default.nix
+++ b/pkgs/development/python-modules/python-socketio/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , bidict
 , buildPythonPackage
 , fetchFromGitHub
diff --git a/pkgs/development/python-modules/python-telegram-bot/default.nix b/pkgs/development/python-modules/python-telegram-bot/default.nix
index 52dea24c45fe..b681fcf85a93 100644
--- a/pkgs/development/python-modules/python-telegram-bot/default.nix
+++ b/pkgs/development/python-modules/python-telegram-bot/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchPypi
 , buildPythonPackage
 , certifi
diff --git a/pkgs/development/python-modules/python-twitter/default.nix b/pkgs/development/python-modules/python-twitter/default.nix
index 4b1e7e2c1eba..c368d97633f4 100644
--- a/pkgs/development/python-modules/python-twitter/default.nix
+++ b/pkgs/development/python-modules/python-twitter/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , fetchpatch
diff --git a/pkgs/development/python-modules/python-u2flib-host/default.nix b/pkgs/development/python-modules/python-u2flib-host/default.nix
index 7f6f14c9888c..94f56698a3e7 100644
--- a/pkgs/development/python-modules/python-u2flib-host/default.nix
+++ b/pkgs/development/python-modules/python-u2flib-host/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, requests, hidapi }:
+{ lib, fetchPypi, buildPythonPackage, requests, hidapi }:
 
 buildPythonPackage rec {
   pname = "python-u2flib-host";
diff --git a/pkgs/development/python-modules/python-uinput/default.nix b/pkgs/development/python-modules/python-uinput/default.nix
index 69f741e74379..8d82ffb6b3b9 100644
--- a/pkgs/development/python-modules/python-uinput/default.nix
+++ b/pkgs/development/python-modules/python-uinput/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , udev }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/python-unshare/default.nix b/pkgs/development/python-modules/python-unshare/default.nix
index fa82027777f6..f80721078dbb 100644
--- a/pkgs/development/python-modules/python-unshare/default.nix
+++ b/pkgs/development/python-modules/python-unshare/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 }:
diff --git a/pkgs/development/python-modules/python-vipaccess/default.nix b/pkgs/development/python-modules/python-vipaccess/default.nix
index f96086393f2e..8c3a5bf797d4 100644
--- a/pkgs/development/python-modules/python-vipaccess/default.nix
+++ b/pkgs/development/python-modules/python-vipaccess/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , oath
diff --git a/pkgs/development/python-modules/python-wifi/default.nix b/pkgs/development/python-modules/python-wifi/default.nix
index 503fbe101b92..7f6eee4906cb 100644
--- a/pkgs/development/python-modules/python-wifi/default.nix
+++ b/pkgs/development/python-modules/python-wifi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/python2-pythondialog/default.nix b/pkgs/development/python-modules/python2-pythondialog/default.nix
index b9d9b110f60c..78378a738dba 100644
--- a/pkgs/development/python-modules/python2-pythondialog/default.nix
+++ b/pkgs/development/python-modules/python2-pythondialog/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/python3-openid/default.nix b/pkgs/development/python-modules/python3-openid/default.nix
index ad8ea88d1d0d..769067f53fb0 100644
--- a/pkgs/development/python-modules/python3-openid/default.nix
+++ b/pkgs/development/python-modules/python3-openid/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, isPy3k, buildPythonPackage, fetchPypi, defusedxml }:
+{ lib, isPy3k, buildPythonPackage, fetchPypi, defusedxml }:
 
 buildPythonPackage rec {
   pname = "python3-openid";
diff --git a/pkgs/development/python-modules/python_fedora/default.nix b/pkgs/development/python-modules/python_fedora/default.nix
index df12d7aeaff6..6a5c6a304f14 100644
--- a/pkgs/development/python-modules/python_fedora/default.nix
+++ b/pkgs/development/python-modules/python_fedora/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, kitchen, requests, bunch, paver
+{ lib, buildPythonPackage, fetchPypi, kitchen, requests, bunch, paver
 , six, munch, urllib3, beautifulsoup4, openidc-client, lockfile }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/python_keyczar/default.nix b/pkgs/development/python-modules/python_keyczar/default.nix
index 5fff75ada911..66cf28a15dde 100644
--- a/pkgs/development/python-modules/python_keyczar/default.nix
+++ b/pkgs/development/python-modules/python_keyczar/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pyasn1
diff --git a/pkgs/development/python-modules/python_mimeparse/default.nix b/pkgs/development/python-modules/python_mimeparse/default.nix
index c3f85affe81b..0f713bd21391 100644
--- a/pkgs/development/python-modules/python_mimeparse/default.nix
+++ b/pkgs/development/python-modules/python_mimeparse/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/python_openzwave/default.nix b/pkgs/development/python-modules/python_openzwave/default.nix
index 2c5357297ea7..8f649d4d4d23 100644
--- a/pkgs/development/python-modules/python_openzwave/default.nix
+++ b/pkgs/development/python-modules/python_openzwave/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k
+{ lib, buildPythonPackage, fetchPypi, isPy3k
 , pkg-config
 , systemd, libyaml, openzwave, cython, pyserial
 , six, pydispatcher, urwid }:
diff --git a/pkgs/development/python-modules/python_statsd/default.nix b/pkgs/development/python-modules/python_statsd/default.nix
index ae293c44c0f7..2aabaec2e14f 100644
--- a/pkgs/development/python-modules/python_statsd/default.nix
+++ b/pkgs/development/python-modules/python_statsd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/pythondialog/default.nix b/pkgs/development/python-modules/pythondialog/default.nix
index c385f11b2f01..6f8b6a2bbec3 100644
--- a/pkgs/development/python-modules/pythondialog/default.nix
+++ b/pkgs/development/python-modules/pythondialog/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/pythonirclib/default.nix b/pkgs/development/python-modules/pythonirclib/default.nix
index 178e1855a061..54c84fe6ef59 100644
--- a/pkgs/development/python-modules/pythonirclib/default.nix
+++ b/pkgs/development/python-modules/pythonirclib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , paver
diff --git a/pkgs/development/python-modules/pythonix/default.nix b/pkgs/development/python-modules/pythonix/default.nix
index 80535b28bf23..9261ab2a8f23 100644
--- a/pkgs/development/python-modules/pythonix/default.nix
+++ b/pkgs/development/python-modules/pythonix/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, ninja, boost, meson, pkg-config, nix, isPy3k, python }:
+{ lib, buildPythonPackage, fetchFromGitHub, ninja, boost, meson, pkg-config, nix, isPy3k, python }:
 
 buildPythonPackage rec {
   pname = "pythonix";
diff --git a/pkgs/development/python-modules/pytimeparse/default.nix b/pkgs/development/python-modules/pytimeparse/default.nix
index 1ced64375301..3bf0ad078c59 100644
--- a/pkgs/development/python-modules/pytimeparse/default.nix
+++ b/pkgs/development/python-modules/pytimeparse/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, nose }:
+{ lib, fetchPypi, buildPythonPackage, nose }:
 
 buildPythonPackage rec {
     pname = "pytimeparse";
diff --git a/pkgs/development/python-modules/pytoml/default.nix b/pkgs/development/python-modules/pytoml/default.nix
index 64e6ed4c669a..b13dfd07dadc 100644
--- a/pkgs/development/python-modules/pytoml/default.nix
+++ b/pkgs/development/python-modules/pytoml/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , python
diff --git a/pkgs/development/python-modules/pytrends/default.nix b/pkgs/development/python-modules/pytrends/default.nix
index 83980c3d00b9..3ce1e70e8239 100644
--- a/pkgs/development/python-modules/pytrends/default.nix
+++ b/pkgs/development/python-modules/pytrends/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/pytricia/default.nix b/pkgs/development/python-modules/pytricia/default.nix
index 8e168bf8181a..01c4ea014adc 100644
--- a/pkgs/development/python-modules/pytricia/default.nix
+++ b/pkgs/development/python-modules/pytricia/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 }:
diff --git a/pkgs/development/python-modules/pytun/default.nix b/pkgs/development/python-modules/pytun/default.nix
index 2b49b169c6d1..3437c0fbe7a5 100644
--- a/pkgs/development/python-modules/pytun/default.nix
+++ b/pkgs/development/python-modules/pytun/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 }:
diff --git a/pkgs/development/python-modules/pytzdata/default.nix b/pkgs/development/python-modules/pytzdata/default.nix
index 739325d33337..342bb088170d 100644
--- a/pkgs/development/python-modules/pytzdata/default.nix
+++ b/pkgs/development/python-modules/pytzdata/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage }:
+{ lib, fetchPypi, buildPythonPackage }:
 
 buildPythonPackage rec {
   pname = "pytzdata";
diff --git a/pkgs/development/python-modules/pyunifi/default.nix b/pkgs/development/python-modules/pyunifi/default.nix
index 1eec6f3ea84d..dfbae696b8e5 100644
--- a/pkgs/development/python-modules/pyunifi/default.nix
+++ b/pkgs/development/python-modules/pyunifi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , requests }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pyupdate/default.nix b/pkgs/development/python-modules/pyupdate/default.nix
index f33aba8d6256..cd0460dc7e19 100644
--- a/pkgs/development/python-modules/pyupdate/default.nix
+++ b/pkgs/development/python-modules/pyupdate/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k
+{ lib, buildPythonPackage, fetchPypi, isPy3k
 , requests }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pyutil/default.nix b/pkgs/development/python-modules/pyutil/default.nix
index f1c0d3be8ccf..dd1c7b2da5b0 100644
--- a/pkgs/development/python-modules/pyutil/default.nix
+++ b/pkgs/development/python-modules/pyutil/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , setuptoolsDarcs
diff --git a/pkgs/development/python-modules/pyuv/default.nix b/pkgs/development/python-modules/pyuv/default.nix
index 95477196d8b9..0be0d61ed0db 100644
--- a/pkgs/development/python-modules/pyuv/default.nix
+++ b/pkgs/development/python-modules/pyuv/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , isPyPy
 , pkgs
diff --git a/pkgs/development/python-modules/pyvoro/default.nix b/pkgs/development/python-modules/pyvoro/default.nix
index 7013cc7809dd..2fd5a96fa933 100644
--- a/pkgs/development/python-modules/pyvoro/default.nix
+++ b/pkgs/development/python-modules/pyvoro/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/pywatchman/default.nix b/pkgs/development/python-modules/pywatchman/default.nix
index 5e3c4d6cc5a0..a2cd2a6eed5a 100644
--- a/pkgs/development/python-modules/pywatchman/default.nix
+++ b/pkgs/development/python-modules/pywatchman/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, watchman }:
+{ lib, buildPythonPackage, fetchPypi, watchman }:
 
 buildPythonPackage rec {
   pname = "pywatchman";
diff --git a/pkgs/development/python-modules/pywebdav/default.nix b/pkgs/development/python-modules/pywebdav/default.nix
index 5ed3e28b5b1b..2f6bb8553a4f 100644
--- a/pkgs/development/python-modules/pywebdav/default.nix
+++ b/pkgs/development/python-modules/pywebdav/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, isPy3k }:
+{ lib, fetchPypi, buildPythonPackage, isPy3k }:
 
 buildPythonPackage rec {
   pname = "PyWebDAV";
diff --git a/pkgs/development/python-modules/pyx/default.nix b/pkgs/development/python-modules/pyx/default.nix
index b19e5f97e141..d46bd718a3ab 100644
--- a/pkgs/development/python-modules/pyx/default.nix
+++ b/pkgs/development/python-modules/pyx/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/pyzufall/default.nix b/pkgs/development/python-modules/pyzufall/default.nix
index 03fce00629d8..e0434e8e4dd4 100644
--- a/pkgs/development/python-modules/pyzufall/default.nix
+++ b/pkgs/development/python-modules/pyzufall/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, python, buildPythonPackage, nose, future, coverage }:
+{ lib, fetchPypi, python, buildPythonPackage, nose, future, coverage }:
 
 buildPythonPackage rec {
   pname = "PyZufall";
diff --git a/pkgs/development/python-modules/qpid-python/default.nix b/pkgs/development/python-modules/qpid-python/default.nix
index ef540538792d..24c90d072a2b 100644
--- a/pkgs/development/python-modules/qpid-python/default.nix
+++ b/pkgs/development/python-modules/qpid-python/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , isPy3k
diff --git a/pkgs/development/python-modules/qrcode/default.nix b/pkgs/development/python-modules/qrcode/default.nix
index 113d53ff29b8..29f2ab49606f 100644
--- a/pkgs/development/python-modules/qrcode/default.nix
+++ b/pkgs/development/python-modules/qrcode/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/qscintilla/default.nix b/pkgs/development/python-modules/qscintilla/default.nix
index 82c3773f3032..24719de779eb 100644
--- a/pkgs/development/python-modules/qscintilla/default.nix
+++ b/pkgs/development/python-modules/qscintilla/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , disabledIf
 , isPy3k
diff --git a/pkgs/development/python-modules/qserve/default.nix b/pkgs/development/python-modules/qserve/default.nix
index ff606d132363..0548b6fdf176 100644
--- a/pkgs/development/python-modules/qserve/default.nix
+++ b/pkgs/development/python-modules/qserve/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/qtawesome/default.nix b/pkgs/development/python-modules/qtawesome/default.nix
index 11b4885e4c8a..4945bead42d4 100644
--- a/pkgs/development/python-modules/qtawesome/default.nix
+++ b/pkgs/development/python-modules/qtawesome/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, qtpy, six, pyqt5, pytest }:
+{ lib, buildPythonPackage, fetchPypi, qtpy, six, pyqt5, pytest }:
 
 buildPythonPackage rec {
   pname = "QtAwesome";
diff --git a/pkgs/development/python-modules/qtpy/default.nix b/pkgs/development/python-modules/qtpy/default.nix
index 76db7090a045..17e1d9dbe83b 100644
--- a/pkgs/development/python-modules/qtpy/default.nix
+++ b/pkgs/development/python-modules/qtpy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pyside, pytest }:
+{ lib, buildPythonPackage, fetchPypi, pyside, pytest }:
 
 buildPythonPackage rec {
   pname = "QtPy";
diff --git a/pkgs/development/python-modules/querystring-parser/default.nix b/pkgs/development/python-modules/querystring-parser/default.nix
index 25b3c113cec6..6288d196bb4e 100644
--- a/pkgs/development/python-modules/querystring-parser/default.nix
+++ b/pkgs/development/python-modules/querystring-parser/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, python, isPy27
+{ lib, buildPythonPackage, fetchPypi, python, isPy27
 , six
 }:
 
diff --git a/pkgs/development/python-modules/queuelib/default.nix b/pkgs/development/python-modules/queuelib/default.nix
index 7471ea180655..3814663c0445 100644
--- a/pkgs/development/python-modules/queuelib/default.nix
+++ b/pkgs/development/python-modules/queuelib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/rabbitpy/default.nix b/pkgs/development/python-modules/rabbitpy/default.nix
index 79975ada5015..0de5d6de3bba 100644
--- a/pkgs/development/python-modules/rabbitpy/default.nix
+++ b/pkgs/development/python-modules/rabbitpy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , mock
diff --git a/pkgs/development/python-modules/radicale_infcloud/default.nix b/pkgs/development/python-modules/radicale_infcloud/default.nix
index 5c561b6e6541..5d3540e01956 100644
--- a/pkgs/development/python-modules/radicale_infcloud/default.nix
+++ b/pkgs/development/python-modules/radicale_infcloud/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonPackage }:
+{ lib, fetchFromGitHub, buildPythonPackage }:
 
 buildPythonPackage {
   pname = "radicale_infcloud";
diff --git a/pkgs/development/python-modules/rainbowstream/default.nix b/pkgs/development/python-modules/rainbowstream/default.nix
index c5ec1d3ab4ef..e484c07f31ca 100644
--- a/pkgs/development/python-modules/rainbowstream/default.nix
+++ b/pkgs/development/python-modules/rainbowstream/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , python
diff --git a/pkgs/development/python-modules/ramlfications/default.nix b/pkgs/development/python-modules/ramlfications/default.nix
index 2d3e2bdc0e03..c3ae88d1775c 100644
--- a/pkgs/development/python-modules/ramlfications/default.nix
+++ b/pkgs/development/python-modules/ramlfications/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , mock, pytest, pytest-mock, pytest-server-fixtures, pytest-localserver
 , termcolor, click, markdown2, six, jsonref, pyyaml, xmltodict, attrs
 }:
diff --git a/pkgs/development/python-modules/random2/default.nix b/pkgs/development/python-modules/random2/default.nix
index 9ed7701a3f45..6845a5707da7 100644
--- a/pkgs/development/python-modules/random2/default.nix
+++ b/pkgs/development/python-modules/random2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPyPy
diff --git a/pkgs/development/python-modules/rarfile/default.nix b/pkgs/development/python-modules/rarfile/default.nix
index 22c34b82a5fa..545782d853ea 100644
--- a/pkgs/development/python-modules/rarfile/default.nix
+++ b/pkgs/development/python-modules/rarfile/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, pytestCheckHook, nose, libarchive, glibcLocales, isPy27
+{ lib, buildPythonPackage, fetchFromGitHub, pytestCheckHook, nose, libarchive, glibcLocales, isPy27
 # unrar is non-free software
 , useUnrar ? false, unrar
 }:
diff --git a/pkgs/development/python-modules/ratelimiter/default.nix b/pkgs/development/python-modules/ratelimiter/default.nix
index 4d3ff6d486b4..fc51e1488d6a 100644
--- a/pkgs/development/python-modules/ratelimiter/default.nix
+++ b/pkgs/development/python-modules/ratelimiter/default.nix
@@ -1,5 +1,5 @@
 {
-  lib, stdenv
+  lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/rawkit/default.nix b/pkgs/development/python-modules/rawkit/default.nix
index 974f7ac4d1c6..0a96123db04c 100644
--- a/pkgs/development/python-modules/rawkit/default.nix
+++ b/pkgs/development/python-modules/rawkit/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, fetchpatch
+{ lib, fetchPypi, buildPythonPackage, fetchpatch
 , libraw
 , pytest, mock }:
 
diff --git a/pkgs/development/python-modules/rcssmin/default.nix b/pkgs/development/python-modules/rcssmin/default.nix
index 507102222fe0..3de6f2038038 100644
--- a/pkgs/development/python-modules/rcssmin/default.nix
+++ b/pkgs/development/python-modules/rcssmin/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 buildPythonPackage rec {
   pname = "rcssmin";
   version = "1.0.6";
diff --git a/pkgs/development/python-modules/readchar/default.nix b/pkgs/development/python-modules/readchar/default.nix
index 211f5d63a7dd..ea13c7083fe7 100644
--- a/pkgs/development/python-modules/readchar/default.nix
+++ b/pkgs/development/python-modules/readchar/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, flake8, pytest, pytestcov, pexpect }:
+{ lib, buildPythonPackage, fetchFromGitHub, flake8, pytest, pytestcov, pexpect }:
 
 buildPythonPackage rec {
   pname = "readchar";
diff --git a/pkgs/development/python-modules/readme/default.nix b/pkgs/development/python-modules/readme/default.nix
index 044c487eb037..95b45185a08c 100644
--- a/pkgs/development/python-modules/readme/default.nix
+++ b/pkgs/development/python-modules/readme/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/rebulk/default.nix b/pkgs/development/python-modules/rebulk/default.nix
index 750efe357c22..8a4754e7a61d 100644
--- a/pkgs/development/python-modules/rebulk/default.nix
+++ b/pkgs/development/python-modules/rebulk/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest, pytestrunner, six, regex}:
+{ lib, buildPythonPackage, fetchPypi, pytest, pytestrunner, six, regex}:
 
 buildPythonPackage rec {
   pname = "rebulk";
diff --git a/pkgs/development/python-modules/recaptcha_client/default.nix b/pkgs/development/python-modules/recaptcha_client/default.nix
index 08e7ff47aa1c..dce24cfa7a8f 100644
--- a/pkgs/development/python-modules/recaptcha_client/default.nix
+++ b/pkgs/development/python-modules/recaptcha_client/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonAtLeast
diff --git a/pkgs/development/python-modules/reedsolo/default.nix b/pkgs/development/python-modules/reedsolo/default.nix
index c87a89b82a44..d9dd54e29f43 100644
--- a/pkgs/development/python-modules/reedsolo/default.nix
+++ b/pkgs/development/python-modules/reedsolo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, cython, nose }:
+{ lib, buildPythonPackage, fetchFromGitHub, cython, nose }:
 
 buildPythonPackage rec {
   pname = "reedsolo";
diff --git a/pkgs/development/python-modules/remotecv/default.nix b/pkgs/development/python-modules/remotecv/default.nix
index dc40763f6fe6..078e431f3baa 100644
--- a/pkgs/development/python-modules/remotecv/default.nix
+++ b/pkgs/development/python-modules/remotecv/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, pillow, pyres, nose
+{ lib, buildPythonPackage, fetchFromGitHub, pillow, pyres, nose
 , preggy, numpy, yanc, nose-focus, mock, opencv }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/rencode/default.nix b/pkgs/development/python-modules/rencode/default.nix
index a8f0f81ee71d..a742c422ee90 100644
--- a/pkgs/development/python-modules/rencode/default.nix
+++ b/pkgs/development/python-modules/rencode/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchgit
 , cython
diff --git a/pkgs/development/python-modules/repeated_test/default.nix b/pkgs/development/python-modules/repeated_test/default.nix
index a9355cda41ca..2c51238e19b5 100644
--- a/pkgs/development/python-modules/repeated_test/default.nix
+++ b/pkgs/development/python-modules/repeated_test/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , unittest2
diff --git a/pkgs/development/python-modules/repocheck/default.nix b/pkgs/development/python-modules/repocheck/default.nix
index ad8c3aef2eac..9d6c2c419216 100644
--- a/pkgs/development/python-modules/repocheck/default.nix
+++ b/pkgs/development/python-modules/repocheck/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 }:
diff --git a/pkgs/development/python-modules/repoze_lru/default.nix b/pkgs/development/python-modules/repoze_lru/default.nix
index 7b8f0ecd8091..e986f47e6e0d 100644
--- a/pkgs/development/python-modules/repoze_lru/default.nix
+++ b/pkgs/development/python-modules/repoze_lru/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/repoze_sphinx_autointerface/default.nix b/pkgs/development/python-modules/repoze_sphinx_autointerface/default.nix
index 53761203113d..5d5e27a2e115 100644
--- a/pkgs/development/python-modules/repoze_sphinx_autointerface/default.nix
+++ b/pkgs/development/python-modules/repoze_sphinx_autointerface/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , zope_interface
diff --git a/pkgs/development/python-modules/repoze_who/default.nix b/pkgs/development/python-modules/repoze_who/default.nix
index f64158f26a10..1b33bb6954bf 100644
--- a/pkgs/development/python-modules/repoze_who/default.nix
+++ b/pkgs/development/python-modules/repoze_who/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , zope_interface
diff --git a/pkgs/development/python-modules/requests-cache/default.nix b/pkgs/development/python-modules/requests-cache/default.nix
index 2b3d57831c8d..d39fcc5f2a6e 100644
--- a/pkgs/development/python-modules/requests-cache/default.nix
+++ b/pkgs/development/python-modules/requests-cache/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , mock, requests, six, urllib3 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/requests-http-signature/default.nix b/pkgs/development/python-modules/requests-http-signature/default.nix
index cd36a4528198..225a8f149e47 100644
--- a/pkgs/development/python-modules/requests-http-signature/default.nix
+++ b/pkgs/development/python-modules/requests-http-signature/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , requests
diff --git a/pkgs/development/python-modules/requests-kerberos/default.nix b/pkgs/development/python-modules/requests-kerberos/default.nix
index a1c6f4fb0a1b..73272990e0f2 100644
--- a/pkgs/development/python-modules/requests-kerberos/default.nix
+++ b/pkgs/development/python-modules/requests-kerberos/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonPackage, requests, pykerberos, mock }:
+{ lib, fetchFromGitHub, buildPythonPackage, requests, pykerberos, mock }:
 
 buildPythonPackage rec {
   pname = "requests-kerberos";
diff --git a/pkgs/development/python-modules/requests/default.nix b/pkgs/development/python-modules/requests/default.nix
index a49b07102201..e0dfb9a24a64 100644
--- a/pkgs/development/python-modules/requests/default.nix
+++ b/pkgs/development/python-modules/requests/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage
+{ lib, fetchPypi, buildPythonPackage
 , urllib3, idna, chardet, certifi
 , pytest }:
 
diff --git a/pkgs/development/python-modules/resampy/default.nix b/pkgs/development/python-modules/resampy/default.nix
index 38b4ae9911d2..551c7f5b93e6 100644
--- a/pkgs/development/python-modules/resampy/default.nix
+++ b/pkgs/development/python-modules/resampy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , pytest
diff --git a/pkgs/development/python-modules/rethinkdb/default.nix b/pkgs/development/python-modules/rethinkdb/default.nix
index b35900233736..947aa505f706 100644
--- a/pkgs/development/python-modules/rethinkdb/default.nix
+++ b/pkgs/development/python-modules/rethinkdb/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/retry_decorator/default.nix b/pkgs/development/python-modules/retry_decorator/default.nix
index 12ba4f9a1a5b..c2f91c8fe1b1 100644
--- a/pkgs/development/python-modules/retry_decorator/default.nix
+++ b/pkgs/development/python-modules/retry_decorator/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/retrying/default.nix b/pkgs/development/python-modules/retrying/default.nix
index 65127d040f42..5e2451affb90 100644
--- a/pkgs/development/python-modules/retrying/default.nix
+++ b/pkgs/development/python-modules/retrying/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/rfc-bibtex/default.nix b/pkgs/development/python-modules/rfc-bibtex/default.nix
index c002f0baaa9d..b9b7cdb76c4f 100644
--- a/pkgs/development/python-modules/rfc-bibtex/default.nix
+++ b/pkgs/development/python-modules/rfc-bibtex/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonApplication, fetchPypi, isPy3k }:
+{ lib, buildPythonApplication, fetchPypi, isPy3k }:
 
 buildPythonApplication rec {
   pname = "rfc-bibtex";
diff --git a/pkgs/development/python-modules/rfc3986/default.nix b/pkgs/development/python-modules/rfc3986/default.nix
index 561bda08d0cd..93f2f2ce37d8 100644
--- a/pkgs/development/python-modules/rfc3986/default.nix
+++ b/pkgs/development/python-modules/rfc3986/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, idna, pytestCheckHook }:
+{ lib, buildPythonPackage, fetchPypi, idna, pytestCheckHook }:
 
 buildPythonPackage rec {
   pname = "rfc3986";
diff --git a/pkgs/development/python-modules/rfc3987/default.nix b/pkgs/development/python-modules/rfc3987/default.nix
index 1ec8fc2153c1..41beb1c8c17f 100644
--- a/pkgs/development/python-modules/rfc3987/default.nix
+++ b/pkgs/development/python-modules/rfc3987/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "rfc3987";
diff --git a/pkgs/development/python-modules/rich/default.nix b/pkgs/development/python-modules/rich/default.nix
index d19f47281cdc..3c0810072c00 100644
--- a/pkgs/development/python-modules/rich/default.nix
+++ b/pkgs/development/python-modules/rich/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , pythonOlder
diff --git a/pkgs/development/python-modules/rjsmin/default.nix b/pkgs/development/python-modules/rjsmin/default.nix
index 7ca9d711739a..d78c445a3e56 100644
--- a/pkgs/development/python-modules/rjsmin/default.nix
+++ b/pkgs/development/python-modules/rjsmin/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 buildPythonPackage rec {
   pname = "rjsmin";
   version = "1.1.0";
diff --git a/pkgs/development/python-modules/rl-coach/default.nix b/pkgs/development/python-modules/rl-coach/default.nix
index 0ac5d9ab2a3b..0724abec19a9 100644
--- a/pkgs/development/python-modules/rl-coach/default.nix
+++ b/pkgs/development/python-modules/rl-coach/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , buildPythonPackage
 , pythonOlder
 , fetchPypi
diff --git a/pkgs/development/python-modules/robomachine/default.nix b/pkgs/development/python-modules/robomachine/default.nix
index fe069be459cc..4f5d44006c44 100644
--- a/pkgs/development/python-modules/robomachine/default.nix
+++ b/pkgs/development/python-modules/robomachine/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, pyparsing, robotframework, allpairspy }:
+{ lib, fetchPypi, buildPythonPackage, pyparsing, robotframework, allpairspy }:
 
 buildPythonPackage rec {
   pname = "RoboMachine";
diff --git a/pkgs/development/python-modules/robot-detection/default.nix b/pkgs/development/python-modules/robot-detection/default.nix
index 3cf064d2669d..31b1f43a4e24 100644
--- a/pkgs/development/python-modules/robot-detection/default.nix
+++ b/pkgs/development/python-modules/robot-detection/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, six }:
+{ lib, buildPythonPackage, fetchPypi, six }:
 
 buildPythonPackage rec {
   pname = "robot-detection";
diff --git a/pkgs/development/python-modules/robotframework-databaselibrary/default.nix b/pkgs/development/python-modules/robotframework-databaselibrary/default.nix
index c3eb309dfe0b..8dfbb32fe08d 100644
--- a/pkgs/development/python-modules/robotframework-databaselibrary/default.nix
+++ b/pkgs/development/python-modules/robotframework-databaselibrary/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , robotframework
diff --git a/pkgs/development/python-modules/robotframework-requests/default.nix b/pkgs/development/python-modules/robotframework-requests/default.nix
index 967138620e98..f23979f21fd1 100644
--- a/pkgs/development/python-modules/robotframework-requests/default.nix
+++ b/pkgs/development/python-modules/robotframework-requests/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , unittest2
diff --git a/pkgs/development/python-modules/robotframework-ride/default.nix b/pkgs/development/python-modules/robotframework-ride/default.nix
index 39e42596e2ae..bc9e0873fe54 100644
--- a/pkgs/development/python-modules/robotframework-ride/default.nix
+++ b/pkgs/development/python-modules/robotframework-ride/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, buildPythonPackage, isPy3k, pygments, wxPython }:
+{ lib, fetchurl, buildPythonPackage, isPy3k, pygments, wxPython }:
 
 buildPythonPackage rec {
   version = "1.2.3";
diff --git a/pkgs/development/python-modules/robotframework-selenium2library/default.nix b/pkgs/development/python-modules/robotframework-selenium2library/default.nix
index 5fa87d17d11f..6d079a99b4f1 100644
--- a/pkgs/development/python-modules/robotframework-selenium2library/default.nix
+++ b/pkgs/development/python-modules/robotframework-selenium2library/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, robotframework-seleniumlibrary }:
+{ lib, buildPythonPackage, fetchPypi, robotframework-seleniumlibrary }:
 
 buildPythonPackage rec {
   version = "3.0.0";
diff --git a/pkgs/development/python-modules/robotframework-seleniumlibrary/default.nix b/pkgs/development/python-modules/robotframework-seleniumlibrary/default.nix
index 60123d6b87d1..fbb8cb034a51 100644
--- a/pkgs/development/python-modules/robotframework-seleniumlibrary/default.nix
+++ b/pkgs/development/python-modules/robotframework-seleniumlibrary/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, python, robotframework, selenium, mockito, robotstatuschecker, approvaltests }:
+{ lib, buildPythonPackage, fetchFromGitHub, python, robotframework, selenium, mockito, robotstatuschecker, approvaltests }:
 
 buildPythonPackage rec {
   version = "3.3.1";
diff --git a/pkgs/development/python-modules/robotframework-sshlibrary/default.nix b/pkgs/development/python-modules/robotframework-sshlibrary/default.nix
index 7e3bcbcc55da..62fb43e02691 100644
--- a/pkgs/development/python-modules/robotframework-sshlibrary/default.nix
+++ b/pkgs/development/python-modules/robotframework-sshlibrary/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , robotframework
diff --git a/pkgs/development/python-modules/robotframework-tools/default.nix b/pkgs/development/python-modules/robotframework-tools/default.nix
index 5bc7bbceae71..9b90b25bfb72 100644
--- a/pkgs/development/python-modules/robotframework-tools/default.nix
+++ b/pkgs/development/python-modules/robotframework-tools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/robotframework/default.nix b/pkgs/development/python-modules/robotframework/default.nix
index 953602ca1ada..cc57fa0d0264 100644
--- a/pkgs/development/python-modules/robotframework/default.nix
+++ b/pkgs/development/python-modules/robotframework/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage }:
+{ lib, fetchPypi, buildPythonPackage }:
 
 buildPythonPackage rec {
   pname = "robotframework";
diff --git a/pkgs/development/python-modules/robotstatuschecker/default.nix b/pkgs/development/python-modules/robotstatuschecker/default.nix
index b0bd44f9c152..81226a23452e 100644
--- a/pkgs/development/python-modules/robotstatuschecker/default.nix
+++ b/pkgs/development/python-modules/robotstatuschecker/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, python, robotframework }:
+{ lib, buildPythonPackage, fetchFromGitHub, python, robotframework }:
 
 buildPythonPackage rec {
   version = "1.3";
diff --git a/pkgs/development/python-modules/robotsuite/default.nix b/pkgs/development/python-modules/robotsuite/default.nix
index 126153ec50e5..5c46686adae4 100644
--- a/pkgs/development/python-modules/robotsuite/default.nix
+++ b/pkgs/development/python-modules/robotsuite/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , unittest2, lxml, robotframework
 }:
 
diff --git a/pkgs/development/python-modules/roku/default.nix b/pkgs/development/python-modules/roku/default.nix
index 5e3644468fe8..c82eda6e35c0 100644
--- a/pkgs/development/python-modules/roku/default.nix
+++ b/pkgs/development/python-modules/roku/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonPackage, requests, pytest, flask, isPy27
+{ lib, fetchFromGitHub, buildPythonPackage, requests, pytest, flask, isPy27
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/roman/default.nix b/pkgs/development/python-modules/roman/default.nix
index 33f0f7f18d7d..cde0ab0f271b 100644
--- a/pkgs/development/python-modules/roman/default.nix
+++ b/pkgs/development/python-modules/roman/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/rope/default.nix b/pkgs/development/python-modules/rope/default.nix
index 65edd602d8de..c4e451aade5e 100644
--- a/pkgs/development/python-modules/rope/default.nix
+++ b/pkgs/development/python-modules/rope/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pythonAtLeast, nose }:
+{ lib, buildPythonPackage, fetchPypi, pythonAtLeast, nose }:
 
 buildPythonPackage rec {
   pname = "rope";
diff --git a/pkgs/development/python-modules/ropper/default.nix b/pkgs/development/python-modules/ropper/default.nix
index 8b193caa7b8b..5a472ceb1801 100644
--- a/pkgs/development/python-modules/ropper/default.nix
+++ b/pkgs/development/python-modules/ropper/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonApplication
 , fetchPypi
 , capstone
diff --git a/pkgs/development/python-modules/routes/default.nix b/pkgs/development/python-modules/routes/default.nix
index 0129ef69e2c6..1176fcb4eb09 100644
--- a/pkgs/development/python-modules/routes/default.nix
+++ b/pkgs/development/python-modules/routes/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , repoze_lru
diff --git a/pkgs/development/python-modules/rpdb/default.nix b/pkgs/development/python-modules/rpdb/default.nix
index fb84adb7d240..69a886f6e0da 100644
--- a/pkgs/development/python-modules/rpdb/default.nix
+++ b/pkgs/development/python-modules/rpdb/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/rpkg/default.nix b/pkgs/development/python-modules/rpkg/default.nix
index 731a5738e73e..5f1cfc622c9f 100644
--- a/pkgs/development/python-modules/rpkg/default.nix
+++ b/pkgs/development/python-modules/rpkg/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, isPy3k, fetchurl, six, pycurl, cccolutils
+{ lib, buildPythonPackage, isPy3k, fetchurl, six, pycurl, cccolutils
 , koji, rpmfluff }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/rply/default.nix b/pkgs/development/python-modules/rply/default.nix
index 0da9d2b71018..33f8547496db 100644
--- a/pkgs/development/python-modules/rply/default.nix
+++ b/pkgs/development/python-modules/rply/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, pytest, fetchFromGitHub, buildPythonPackage, appdirs }:
+{ lib, pytest, fetchFromGitHub, buildPythonPackage, appdirs }:
 
 buildPythonPackage rec {
   pname = "rply";
diff --git a/pkgs/development/python-modules/rpmfluff/default.nix b/pkgs/development/python-modules/rpmfluff/default.nix
index 96050ba14b01..9957393770b3 100644
--- a/pkgs/development/python-modules/rpmfluff/default.nix
+++ b/pkgs/development/python-modules/rpmfluff/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , glibcLocales
diff --git a/pkgs/development/python-modules/rq/default.nix b/pkgs/development/python-modules/rq/default.nix
index c9ca5977cb10..8ec05aae9d52 100644
--- a/pkgs/development/python-modules/rq/default.nix
+++ b/pkgs/development/python-modules/rq/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonPackage, isPy27, click, redis }:
+{ lib, fetchFromGitHub, buildPythonPackage, isPy27, click, redis }:
 
 buildPythonPackage rec {
   pname = "rq";
diff --git a/pkgs/development/python-modules/rsa/4_0.nix b/pkgs/development/python-modules/rsa/4_0.nix
index 8400647aaad6..1a9ad2171a07 100644
--- a/pkgs/development/python-modules/rsa/4_0.nix
+++ b/pkgs/development/python-modules/rsa/4_0.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , unittest2
diff --git a/pkgs/development/python-modules/rsa/default.nix b/pkgs/development/python-modules/rsa/default.nix
index b688369beb56..7a990061e00e 100644
--- a/pkgs/development/python-modules/rsa/default.nix
+++ b/pkgs/development/python-modules/rsa/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , unittest2
diff --git a/pkgs/development/python-modules/rtslib/default.nix b/pkgs/development/python-modules/rtslib/default.nix
index e53756b0181a..e6289378c967 100644
--- a/pkgs/development/python-modules/rtslib/default.nix
+++ b/pkgs/development/python-modules/rtslib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonPackage, six, pyudev, pygobject3 }:
+{ lib, fetchFromGitHub, buildPythonPackage, six, pyudev, pygobject3 }:
 
 buildPythonPackage rec {
   pname = "rtslib";
diff --git a/pkgs/development/python-modules/ruamel_base/default.nix b/pkgs/development/python-modules/ruamel_base/default.nix
index 950f523f4a9a..1f829bb4e0ba 100644
--- a/pkgs/development/python-modules/ruamel_base/default.nix
+++ b/pkgs/development/python-modules/ruamel_base/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/ruamel_ordereddict/default.nix b/pkgs/development/python-modules/ruamel_ordereddict/default.nix
index 1e5820a37f73..98c36221dcd5 100644
--- a/pkgs/development/python-modules/ruamel_ordereddict/default.nix
+++ b/pkgs/development/python-modules/ruamel_ordereddict/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/ruamel_yaml_clib/default.nix b/pkgs/development/python-modules/ruamel_yaml_clib/default.nix
index debf2aaf7747..8304f5d7dadc 100644
--- a/pkgs/development/python-modules/ruamel_yaml_clib/default.nix
+++ b/pkgs/development/python-modules/ruamel_yaml_clib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchhg
 , ruamel_base
diff --git a/pkgs/development/python-modules/rubymarshal/default.nix b/pkgs/development/python-modules/rubymarshal/default.nix
index edb793c19d51..51cec6f86025 100644
--- a/pkgs/development/python-modules/rubymarshal/default.nix
+++ b/pkgs/development/python-modules/rubymarshal/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, hypothesis, isPy3k }:
+{ lib, buildPythonPackage, fetchPypi, hypothesis, isPy3k }:
 
 buildPythonPackage rec {
   pname = "rubymarshal";
diff --git a/pkgs/development/python-modules/runsnakerun/default.nix b/pkgs/development/python-modules/runsnakerun/default.nix
index 1475b0032313..ace9b8269c53 100644
--- a/pkgs/development/python-modules/runsnakerun/default.nix
+++ b/pkgs/development/python-modules/runsnakerun/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , squaremap
diff --git a/pkgs/development/python-modules/s3fs/default.nix b/pkgs/development/python-modules/s3fs/default.nix
index 0154059c4f7b..9bb2a513174c 100644
--- a/pkgs/development/python-modules/s3fs/default.nix
+++ b/pkgs/development/python-modules/s3fs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, docutils, aiobotocore, fsspec }:
+{ lib, buildPythonPackage, fetchPypi, docutils, aiobotocore, fsspec }:
 
 buildPythonPackage rec {
   pname = "s3fs";
diff --git a/pkgs/development/python-modules/sacremoses/default.nix b/pkgs/development/python-modules/sacremoses/default.nix
index 9f97757edad4..4ffea014001b 100644
--- a/pkgs/development/python-modules/sacremoses/default.nix
+++ b/pkgs/development/python-modules/sacremoses/default.nix
@@ -1,5 +1,5 @@
 { buildPythonPackage
-, lib, stdenv
+, lib
 , fetchFromGitHub
 , click
 , six
diff --git a/pkgs/development/python-modules/safe/default.nix b/pkgs/development/python-modules/safe/default.nix
index d167760c3e0e..6a4515b90f83 100644
--- a/pkgs/development/python-modules/safe/default.nix
+++ b/pkgs/development/python-modules/safe/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/salmon-mail/default.nix b/pkgs/development/python-modules/salmon-mail/default.nix
index 5e6aa5927eca..0b8edf8bdd90 100644
--- a/pkgs/development/python-modules/salmon-mail/default.nix
+++ b/pkgs/development/python-modules/salmon-mail/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, dnspython, chardet, lmtpd
+{ lib, buildPythonPackage, fetchPypi, dnspython, chardet, lmtpd
 , python-daemon, six, jinja2, mock, click }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/samplerate/default.nix b/pkgs/development/python-modules/samplerate/default.nix
index a4a19f7ad12e..9c26c9e2e2b3 100644
--- a/pkgs/development/python-modules/samplerate/default.nix
+++ b/pkgs/development/python-modules/samplerate/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , numpy
 , pkgs
diff --git a/pkgs/development/python-modules/sandboxlib/default.nix b/pkgs/development/python-modules/sandboxlib/default.nix
index 42872e318916..1be4c485b800 100644
--- a/pkgs/development/python-modules/sandboxlib/default.nix
+++ b/pkgs/development/python-modules/sandboxlib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pbr
diff --git a/pkgs/development/python-modules/sapi-python-client/default.nix b/pkgs/development/python-modules/sapi-python-client/default.nix
index 8a7a62d8ce84..222b4c60c7f2 100644
--- a/pkgs/development/python-modules/sapi-python-client/default.nix
+++ b/pkgs/development/python-modules/sapi-python-client/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, git, setuptools, setuptools_scm, fetchFromGitHub, requests, boto3, buildPythonPackage, responses }:
+{ lib, git, setuptools, setuptools_scm, fetchFromGitHub, requests, boto3, buildPythonPackage, responses }:
 
 buildPythonPackage rec {
     pname = "sapi-python-client";
diff --git a/pkgs/development/python-modules/scales/default.nix b/pkgs/development/python-modules/scales/default.nix
index 5aae62972688..3806ffb9d46b 100644
--- a/pkgs/development/python-modules/scales/default.nix
+++ b/pkgs/development/python-modules/scales/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/schedule/default.nix b/pkgs/development/python-modules/schedule/default.nix
index 596ed993233e..2eda0cd6ac98 100644
--- a/pkgs/development/python-modules/schedule/default.nix
+++ b/pkgs/development/python-modules/schedule/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , mock
diff --git a/pkgs/development/python-modules/schema/default.nix b/pkgs/development/python-modules/schema/default.nix
index 1502c7d10abe..483a891f9332 100644
--- a/pkgs/development/python-modules/schema/default.nix
+++ b/pkgs/development/python-modules/schema/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, contextlib2, pytest, mock }:
+{ lib, buildPythonPackage, fetchPypi, contextlib2, pytest, mock }:
 
 buildPythonPackage rec {
 
diff --git a/pkgs/development/python-modules/scikit-bio/default.nix b/pkgs/development/python-modules/scikit-bio/default.nix
index 8fa0186498f4..f14c4d82f428 100644
--- a/pkgs/development/python-modules/scikit-bio/default.nix
+++ b/pkgs/development/python-modules/scikit-bio/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , cython
diff --git a/pkgs/development/python-modules/scikits-odes/default.nix b/pkgs/development/python-modules/scikits-odes/default.nix
index 383cf1f70c68..8921e0061aa6 100644
--- a/pkgs/development/python-modules/scikits-odes/default.nix
+++ b/pkgs/development/python-modules/scikits-odes/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , buildPythonPackage
 , fetchPypi
 , fetchurl
diff --git a/pkgs/development/python-modules/scp/default.nix b/pkgs/development/python-modules/scp/default.nix
index f5cd96e71aaf..abbe932c2670 100644
--- a/pkgs/development/python-modules/scp/default.nix
+++ b/pkgs/development/python-modules/scp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , paramiko
diff --git a/pkgs/development/python-modules/scrapy-deltafetch/default.nix b/pkgs/development/python-modules/scrapy-deltafetch/default.nix
index 900943a0e153..006c8ed03023 100644
--- a/pkgs/development/python-modules/scrapy-deltafetch/default.nix
+++ b/pkgs/development/python-modules/scrapy-deltafetch/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchPypi, buildPythonPackage, scrapy, bsddb3 }:
+{ lib, fetchPypi, buildPythonPackage, scrapy, bsddb3 }:
 
 buildPythonPackage rec {
   pname = "scrapy-deltafetch";
diff --git a/pkgs/development/python-modules/scrapy-fake-useragent/default.nix b/pkgs/development/python-modules/scrapy-fake-useragent/default.nix
index 4f6eecfe9143..f9f896a563b7 100644
--- a/pkgs/development/python-modules/scrapy-fake-useragent/default.nix
+++ b/pkgs/development/python-modules/scrapy-fake-useragent/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonPackage, pytestCheckHook, pytestcov, pytest-mock, fake-useragent, faker, scrapy }:
+{ lib, fetchFromGitHub, buildPythonPackage, pytestCheckHook, pytestcov, pytest-mock, fake-useragent, faker, scrapy }:
 
 buildPythonPackage rec {
   pname = "scrapy-fake-useragent";
diff --git a/pkgs/development/python-modules/scrapy-splash/default.nix b/pkgs/development/python-modules/scrapy-splash/default.nix
index ab00377f4a0e..5f6721f8162c 100644
--- a/pkgs/development/python-modules/scrapy-splash/default.nix
+++ b/pkgs/development/python-modules/scrapy-splash/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchPypi, buildPythonPackage, scrapy, six }:
+{ lib, fetchPypi, buildPythonPackage, scrapy, six }:
 
 buildPythonPackage rec {
   pname = "scrapy-splash";
diff --git a/pkgs/development/python-modules/screeninfo/default.nix b/pkgs/development/python-modules/screeninfo/default.nix
index f71f8d0c263a..5f238a7e05fa 100644
--- a/pkgs/development/python-modules/screeninfo/default.nix
+++ b/pkgs/development/python-modules/screeninfo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonApplication, fetchPypi, isPy27, isPy36, dataclasses, libX11, libXinerama, libXrandr }:
+{ lib, buildPythonApplication, fetchPypi, isPy27, isPy36, dataclasses, libX11, libXinerama, libXrandr }:
 
 buildPythonApplication rec {
   pname = "screeninfo";
diff --git a/pkgs/development/python-modules/scripttest/default.nix b/pkgs/development/python-modules/scripttest/default.nix
index ab234ce22434..5fe4b2b2ee6f 100644
--- a/pkgs/development/python-modules/scripttest/default.nix
+++ b/pkgs/development/python-modules/scripttest/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/sdnotify/default.nix b/pkgs/development/python-modules/sdnotify/default.nix
index 0003d9c01312..a447283c63ab 100644
--- a/pkgs/development/python-modules/sdnotify/default.nix
+++ b/pkgs/development/python-modules/sdnotify/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/seabreeze/default.nix b/pkgs/development/python-modules/seabreeze/default.nix
index cc9594d04525..f4a4955a7392 100644
--- a/pkgs/development/python-modules/seabreeze/default.nix
+++ b/pkgs/development/python-modules/seabreeze/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , buildPythonPackage
 , pyusb
diff --git a/pkgs/development/python-modules/seekpath/default.nix b/pkgs/development/python-modules/seekpath/default.nix
index 637b55eec8d7..dbfe45107769 100644
--- a/pkgs/development/python-modules/seekpath/default.nix
+++ b/pkgs/development/python-modules/seekpath/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, pythonOlder, numpy, future, spglib, glibcLocales, pytest, scipy }:
+{ lib, buildPythonPackage, fetchFromGitHub, pythonOlder, numpy, future, spglib, glibcLocales, pytest, scipy }:
 
 buildPythonPackage rec {
   pname = "seekpath";
diff --git a/pkgs/development/python-modules/selectors2/default.nix b/pkgs/development/python-modules/selectors2/default.nix
index ff6b81d3105d..bd3f77b5b08a 100644
--- a/pkgs/development/python-modules/selectors2/default.nix
+++ b/pkgs/development/python-modules/selectors2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , nose, psutil, mock }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/selectors34/default.nix b/pkgs/development/python-modules/selectors34/default.nix
index ea3b403fdaed..2209ccf43d26 100644
--- a/pkgs/development/python-modules/selectors34/default.nix
+++ b/pkgs/development/python-modules/selectors34/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , python
diff --git a/pkgs/development/python-modules/semantic/default.nix b/pkgs/development/python-modules/semantic/default.nix
index 83e4879e1fdd..518b7637ad71 100644
--- a/pkgs/development/python-modules/semantic/default.nix
+++ b/pkgs/development/python-modules/semantic/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/semver/default.nix b/pkgs/development/python-modules/semver/default.nix
index 71ec776db7c4..c281a6d6b0da 100644
--- a/pkgs/development/python-modules/semver/default.nix
+++ b/pkgs/development/python-modules/semver/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , buildPythonPackage
 , pytestCheckHook
diff --git a/pkgs/development/python-modules/sentencepiece/default.nix b/pkgs/development/python-modules/sentencepiece/default.nix
index dd324260f836..c1ad64b3f5e4 100644
--- a/pkgs/development/python-modules/sentencepiece/default.nix
+++ b/pkgs/development/python-modules/sentencepiece/default.nix
@@ -1,5 +1,5 @@
 { buildPythonPackage
-, stdenv
+
 , sentencepiece
 , pkg-config
 }:
diff --git a/pkgs/development/python-modules/sentry-sdk/default.nix b/pkgs/development/python-modules/sentry-sdk/default.nix
index ea9bbc1f0c3f..b3a1c4ee2f4c 100644
--- a/pkgs/development/python-modules/sentry-sdk/default.nix
+++ b/pkgs/development/python-modules/sentry-sdk/default.nix
@@ -17,7 +17,7 @@
 , rq
 , sanic
 , sqlalchemy
-, lib, stdenv
+, lib
 , tornado
 , urllib3
 , trytond
diff --git a/pkgs/development/python-modules/sepaxml/default.nix b/pkgs/development/python-modules/sepaxml/default.nix
index 095b47db2bff..8f6d4eb94f58 100644
--- a/pkgs/development/python-modules/sepaxml/default.nix
+++ b/pkgs/development/python-modules/sepaxml/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, isPy27
+{ lib, buildPythonPackage, fetchFromGitHub, isPy27
 , lxml
 , pytest
 , text-unidecode
diff --git a/pkgs/development/python-modules/seqdiag/default.nix b/pkgs/development/python-modules/seqdiag/default.nix
index ba4cdca0c636..2ae9defc504e 100644
--- a/pkgs/development/python-modules/seqdiag/default.nix
+++ b/pkgs/development/python-modules/seqdiag/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, buildPythonPackage, isPy27, pep8, nose, unittest2, docutils
+{ lib, fetchurl, buildPythonPackage, isPy27, pep8, nose, unittest2, docutils
 , blockdiag
 }:
 
diff --git a/pkgs/development/python-modules/serpent/default.nix b/pkgs/development/python-modules/serpent/default.nix
index 36840813b401..50f6e0b63a63 100644
--- a/pkgs/development/python-modules/serpent/default.nix
+++ b/pkgs/development/python-modules/serpent/default.nix
@@ -1,7 +1,6 @@
-{ stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
-, lib
 , python
 , isPy27
 , enum34
diff --git a/pkgs/development/python-modules/serversyncstorage/default.nix b/pkgs/development/python-modules/serversyncstorage/default.nix
index fa212d6a4de5..a409d48837e6 100644
--- a/pkgs/development/python-modules/serversyncstorage/default.nix
+++ b/pkgs/development/python-modules/serversyncstorage/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , isPy27
diff --git a/pkgs/development/python-modules/setproctitle/default.nix b/pkgs/development/python-modules/setproctitle/default.nix
index a9c0e7fda893..9338166efefe 100644
--- a/pkgs/development/python-modules/setproctitle/default.nix
+++ b/pkgs/development/python-modules/setproctitle/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytestCheckHook
diff --git a/pkgs/development/python-modules/setuptools-git/default.nix b/pkgs/development/python-modules/setuptools-git/default.nix
index 18fae7b1610b..06e699e19a31 100644
--- a/pkgs/development/python-modules/setuptools-git/default.nix
+++ b/pkgs/development/python-modules/setuptools-git/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pkgs
diff --git a/pkgs/development/python-modules/setuptools-lint/default.nix b/pkgs/development/python-modules/setuptools-lint/default.nix
index ba42c21ad360..f1eb2903f03e 100644
--- a/pkgs/development/python-modules/setuptools-lint/default.nix
+++ b/pkgs/development/python-modules/setuptools-lint/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pylint }:
+{ lib, buildPythonPackage, fetchPypi, pylint }:
 
 buildPythonPackage rec {
   pname = "setuptools-lint";
diff --git a/pkgs/development/python-modules/setuptools-rust/default.nix b/pkgs/development/python-modules/setuptools-rust/default.nix
index 2d9a4b17d40f..ee4a3b551649 100644
--- a/pkgs/development/python-modules/setuptools-rust/default.nix
+++ b/pkgs/development/python-modules/setuptools-rust/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/setuptools-scm-git-archive/default.nix b/pkgs/development/python-modules/setuptools-scm-git-archive/default.nix
index d8558aaf83a7..98795eadfd4d 100644
--- a/pkgs/development/python-modules/setuptools-scm-git-archive/default.nix
+++ b/pkgs/development/python-modules/setuptools-scm-git-archive/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, setuptools_scm, pytest }:
+{ lib, buildPythonPackage, fetchPypi, setuptools_scm, pytest }:
 
 buildPythonPackage rec {
   pname = "setuptools-scm-git-archive";
diff --git a/pkgs/development/python-modules/setuptools_scm/default.nix b/pkgs/development/python-modules/setuptools_scm/default.nix
index a766bb6c294f..ba716c313fd5 100644
--- a/pkgs/development/python-modules/setuptools_scm/default.nix
+++ b/pkgs/development/python-modules/setuptools_scm/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pip, pytest }:
+{ lib, buildPythonPackage, fetchPypi, pip, pytest }:
 
 buildPythonPackage rec {
   pname = "setuptools_scm";
diff --git a/pkgs/development/python-modules/setuptoolsdarcs/default.nix b/pkgs/development/python-modules/setuptoolsdarcs/default.nix
index f6358a831c9c..41fe5043ea85 100644
--- a/pkgs/development/python-modules/setuptoolsdarcs/default.nix
+++ b/pkgs/development/python-modules/setuptoolsdarcs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , darcsver
diff --git a/pkgs/development/python-modules/setuptoolstrial/default.nix b/pkgs/development/python-modules/setuptoolstrial/default.nix
index 1d29f77cf0f2..bef492e5dbcb 100644
--- a/pkgs/development/python-modules/setuptoolstrial/default.nix
+++ b/pkgs/development/python-modules/setuptoolstrial/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/sexpdata/default.nix b/pkgs/development/python-modules/sexpdata/default.nix
index 89f716d9be25..fd7d99fbb3fc 100644
--- a/pkgs/development/python-modules/sexpdata/default.nix
+++ b/pkgs/development/python-modules/sexpdata/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/sgmllib3k/default.nix b/pkgs/development/python-modules/sgmllib3k/default.nix
index 6884bed27483..1104c843c6ee 100644
--- a/pkgs/development/python-modules/sgmllib3k/default.nix
+++ b/pkgs/development/python-modules/sgmllib3k/default.nix
@@ -1,8 +1,7 @@
-{ stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , isPy27
-, lib
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/shap/default.nix b/pkgs/development/python-modules/shap/default.nix
index 1ce9a879ee19..cfbd6f92b04c 100644
--- a/pkgs/development/python-modules/shap/default.nix
+++ b/pkgs/development/python-modules/shap/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , isPy27
diff --git a/pkgs/development/python-modules/shellingham/default.nix b/pkgs/development/python-modules/shellingham/default.nix
index 77a4b98f54c3..300368b31f13 100644
--- a/pkgs/development/python-modules/shellingham/default.nix
+++ b/pkgs/development/python-modules/shellingham/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/shippai/default.nix b/pkgs/development/python-modules/shippai/default.nix
index 8fd15b71a015..e7efb1ef2dc6 100644
--- a/pkgs/development/python-modules/shippai/default.nix
+++ b/pkgs/development/python-modules/shippai/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "shippai";
diff --git a/pkgs/development/python-modules/shortuuid/default.nix b/pkgs/development/python-modules/shortuuid/default.nix
index 35401afa6e3e..f1c1efbc0ec2 100644
--- a/pkgs/development/python-modules/shortuuid/default.nix
+++ b/pkgs/development/python-modules/shortuuid/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , isPy3k
 , fetchPypi
diff --git a/pkgs/development/python-modules/should-dsl/default.nix b/pkgs/development/python-modules/should-dsl/default.nix
index 1499f1ce4bc8..7510ba88d1d5 100644
--- a/pkgs/development/python-modules/should-dsl/default.nix
+++ b/pkgs/development/python-modules/should-dsl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "should-dsl";
diff --git a/pkgs/development/python-modules/shouldbe/default.nix b/pkgs/development/python-modules/shouldbe/default.nix
index 9959f26036cf..b733c1c95162 100644
--- a/pkgs/development/python-modules/shouldbe/default.nix
+++ b/pkgs/development/python-modules/shouldbe/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , pythonAtLeast
 , fetchPypi
diff --git a/pkgs/development/python-modules/signedjson/default.nix b/pkgs/development/python-modules/signedjson/default.nix
index 12614a3446bb..2f47113408e8 100644
--- a/pkgs/development/python-modules/signedjson/default.nix
+++ b/pkgs/development/python-modules/signedjson/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , canonicaljson
diff --git a/pkgs/development/python-modules/sigtools/default.nix b/pkgs/development/python-modules/sigtools/default.nix
index 0c11a2b6c561..1d81ba5180cf 100644
--- a/pkgs/development/python-modules/sigtools/default.nix
+++ b/pkgs/development/python-modules/sigtools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , repeated_test
diff --git a/pkgs/development/python-modules/simanneal/default.nix b/pkgs/development/python-modules/simanneal/default.nix
index 958f53be567d..2d29797b28f9 100644
--- a/pkgs/development/python-modules/simanneal/default.nix
+++ b/pkgs/development/python-modules/simanneal/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonPackage, pytest }:
+{ lib, fetchFromGitHub, buildPythonPackage, pytest }:
 
 buildPythonPackage rec {
   pname = "simanneal";
diff --git a/pkgs/development/python-modules/simple-websocket-server/default.nix b/pkgs/development/python-modules/simple-websocket-server/default.nix
index f8d579b6088d..7228e6d9f3e9 100644
--- a/pkgs/development/python-modules/simple-websocket-server/default.nix
+++ b/pkgs/development/python-modules/simple-websocket-server/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub }:
+{ lib, buildPythonPackage, fetchFromGitHub }:
 
 buildPythonPackage {
   pname = "simple-websocket-server";
diff --git a/pkgs/development/python-modules/simpleai/default.nix b/pkgs/development/python-modules/simpleai/default.nix
index 0786ebfae6e4..2ad7fe9ba28d 100644
--- a/pkgs/development/python-modules/simpleai/default.nix
+++ b/pkgs/development/python-modules/simpleai/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , numpy
diff --git a/pkgs/development/python-modules/simplebayes/default.nix b/pkgs/development/python-modules/simplebayes/default.nix
index ed86b48fc072..06fe8e236b37 100644
--- a/pkgs/development/python-modules/simplebayes/default.nix
+++ b/pkgs/development/python-modules/simplebayes/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , nose
diff --git a/pkgs/development/python-modules/simpleparse/default.nix b/pkgs/development/python-modules/simpleparse/default.nix
index 6395f4af223d..e81a7d41b7a5 100644
--- a/pkgs/development/python-modules/simpleparse/default.nix
+++ b/pkgs/development/python-modules/simpleparse/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/skein/default.nix b/pkgs/development/python-modules/skein/default.nix
index 40a179264273..ad7cc0214393 100644
--- a/pkgs/development/python-modules/skein/default.nix
+++ b/pkgs/development/python-modules/skein/default.nix
@@ -5,7 +5,7 @@
 , jre
 , lib
 , pythonPackages
-, stdenv
+
 }:
 
 let
diff --git a/pkgs/development/python-modules/sklearn-deap/default.nix b/pkgs/development/python-modules/sklearn-deap/default.nix
index 36ec8b18ca7e..958fc613f6f3 100644
--- a/pkgs/development/python-modules/sklearn-deap/default.nix
+++ b/pkgs/development/python-modules/sklearn-deap/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, fetchpatch, numpy, scipy, deap, scikitlearn, python }:
+{ lib, buildPythonPackage, fetchFromGitHub, fetchpatch, numpy, scipy, deap, scikitlearn, python }:
 
 buildPythonPackage rec {
   pname = "sklearn-deap";
diff --git a/pkgs/development/python-modules/slackclient/default.nix b/pkgs/development/python-modules/slackclient/default.nix
index 571398b783dc..a690788095e6 100644
--- a/pkgs/development/python-modules/slackclient/default.nix
+++ b/pkgs/development/python-modules/slackclient/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , aiohttp
diff --git a/pkgs/development/python-modules/sleekxmpp/default.nix b/pkgs/development/python-modules/sleekxmpp/default.nix
index e6d5e59a80e7..07be197f276c 100644
--- a/pkgs/development/python-modules/sleekxmpp/default.nix
+++ b/pkgs/development/python-modules/sleekxmpp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, dns, pyasn1 }:
+{ lib, fetchPypi, buildPythonPackage, dns, pyasn1 }:
 
 buildPythonPackage rec {
   pname = "sleekxmpp";
diff --git a/pkgs/development/python-modules/slicer/default.nix b/pkgs/development/python-modules/slicer/default.nix
index b5521f415d7b..83f3e412ddcf 100644
--- a/pkgs/development/python-modules/slicer/default.nix
+++ b/pkgs/development/python-modules/slicer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/slicerator/default.nix b/pkgs/development/python-modules/slicerator/default.nix
index 396692200039..191159a648ec 100644
--- a/pkgs/development/python-modules/slicerator/default.nix
+++ b/pkgs/development/python-modules/slicerator/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , python
diff --git a/pkgs/development/python-modules/slob/default.nix b/pkgs/development/python-modules/slob/default.nix
index a7520c62a62c..0caec499a95b 100644
--- a/pkgs/development/python-modules/slob/default.nix
+++ b/pkgs/development/python-modules/slob/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , isPy3k
diff --git a/pkgs/development/python-modules/slowaes/default.nix b/pkgs/development/python-modules/slowaes/default.nix
index 5d738fea57e0..ddca8509744d 100644
--- a/pkgs/development/python-modules/slowaes/default.nix
+++ b/pkgs/development/python-modules/slowaes/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/smartdc/default.nix b/pkgs/development/python-modules/smartdc/default.nix
index 0b36a7e9f6e7..ceba9eae9e4b 100644
--- a/pkgs/development/python-modules/smartdc/default.nix
+++ b/pkgs/development/python-modules/smartdc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , requests
diff --git a/pkgs/development/python-modules/smartypants/default.nix b/pkgs/development/python-modules/smartypants/default.nix
index a497f3db413b..d1e11e30d619 100644
--- a/pkgs/development/python-modules/smartypants/default.nix
+++ b/pkgs/development/python-modules/smartypants/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchhg
 , isPyPy
diff --git a/pkgs/development/python-modules/snakeviz/default.nix b/pkgs/development/python-modules/snakeviz/default.nix
index 2c54f65d9c35..42602f15e9bc 100644
--- a/pkgs/development/python-modules/snakeviz/default.nix
+++ b/pkgs/development/python-modules/snakeviz/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, tornado }:
+{ lib, fetchPypi, buildPythonPackage, tornado }:
 
 buildPythonPackage rec {
   pname = "snakeviz";
diff --git a/pkgs/development/python-modules/snapcast/default.nix b/pkgs/development/python-modules/snapcast/default.nix
index 8446683cb1aa..c5df9f7d991d 100644
--- a/pkgs/development/python-modules/snapcast/default.nix
+++ b/pkgs/development/python-modules/snapcast/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k, pytest
+{ lib, buildPythonPackage, fetchPypi, isPy3k, pytest
 , construct }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/snowballstemmer/default.nix b/pkgs/development/python-modules/snowballstemmer/default.nix
index 3364470da1b3..84b2bb2e1435 100644
--- a/pkgs/development/python-modules/snowballstemmer/default.nix
+++ b/pkgs/development/python-modules/snowballstemmer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, PyStemmer, fetchPypi }:
+{ lib, buildPythonPackage, PyStemmer, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "snowballstemmer";
diff --git a/pkgs/development/python-modules/socksipy-branch/default.nix b/pkgs/development/python-modules/socksipy-branch/default.nix
index ca9d8707ac63..abfee3718b53 100644
--- a/pkgs/development/python-modules/socksipy-branch/default.nix
+++ b/pkgs/development/python-modules/socksipy-branch/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/somajo/default.nix b/pkgs/development/python-modules/somajo/default.nix
index bd351b5e86fa..ba1dd1c30112 100644
--- a/pkgs/development/python-modules/somajo/default.nix
+++ b/pkgs/development/python-modules/somajo/default.nix
@@ -1,4 +1,4 @@
-{ pkgs, lib, stdenv, fetchFromGitHub, buildPythonPackage, isPy3k, regex }:
+{ pkgs, lib, fetchFromGitHub, buildPythonPackage, isPy3k, regex }:
 
 buildPythonPackage rec {
   pname = "SoMaJo";
diff --git a/pkgs/development/python-modules/sopel/default.nix b/pkgs/development/python-modules/sopel/default.nix
index 095c0917e596..7b549933588b 100644
--- a/pkgs/development/python-modules/sopel/default.nix
+++ b/pkgs/development/python-modules/sopel/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPyPy
+{ lib, buildPythonPackage, fetchPypi, isPyPy
 , dnspython
 , geoip2
 , ipython
diff --git a/pkgs/development/python-modules/sorl_thumbnail/default.nix b/pkgs/development/python-modules/sorl_thumbnail/default.nix
index e918a1aee3bc..daeca60c1e14 100644
--- a/pkgs/development/python-modules/sorl_thumbnail/default.nix
+++ b/pkgs/development/python-modules/sorl_thumbnail/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/spark_parser/default.nix b/pkgs/development/python-modules/spark_parser/default.nix
index ba927431f2c0..fb30daf81fe7 100644
--- a/pkgs/development/python-modules/spark_parser/default.nix
+++ b/pkgs/development/python-modules/spark_parser/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/sparqlwrapper/default.nix b/pkgs/development/python-modules/sparqlwrapper/default.nix
index b97cbee2a5fe..41c11172d9bf 100644
--- a/pkgs/development/python-modules/sparqlwrapper/default.nix
+++ b/pkgs/development/python-modules/sparqlwrapper/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/speaklater/default.nix b/pkgs/development/python-modules/speaklater/default.nix
index efb0908dc5fc..a9acfb2dbb38 100644
--- a/pkgs/development/python-modules/speaklater/default.nix
+++ b/pkgs/development/python-modules/speaklater/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/spglib/default.nix b/pkgs/development/python-modules/spglib/default.nix
index 08bbb34156bf..88da35a0f972 100644
--- a/pkgs/development/python-modules/spglib/default.nix
+++ b/pkgs/development/python-modules/spglib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, fetchpatch, numpy, nose, pyyaml }:
+{ lib, buildPythonPackage, fetchPypi, fetchpatch, numpy, nose, pyyaml }:
 
 buildPythonPackage rec {
   pname = "spglib";
diff --git a/pkgs/development/python-modules/sphinx_pypi_upload/default.nix b/pkgs/development/python-modules/sphinx_pypi_upload/default.nix
index 77f283795db5..d2c20e980e7a 100644
--- a/pkgs/development/python-modules/sphinx_pypi_upload/default.nix
+++ b/pkgs/development/python-modules/sphinx_pypi_upload/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/sphinx_rtd_theme/default.nix b/pkgs/development/python-modules/sphinx_rtd_theme/default.nix
index 11e3c2a87e93..87da4131351d 100644
--- a/pkgs/development/python-modules/sphinx_rtd_theme/default.nix
+++ b/pkgs/development/python-modules/sphinx_rtd_theme/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , sphinx
diff --git a/pkgs/development/python-modules/sphinxcontrib-applehelp/default.nix b/pkgs/development/python-modules/sphinxcontrib-applehelp/default.nix
index e2bfc5bdaa55..9c3c16657f29 100644
--- a/pkgs/development/python-modules/sphinxcontrib-applehelp/default.nix
+++ b/pkgs/development/python-modules/sphinxcontrib-applehelp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/sphinxcontrib-autoapi/default.nix b/pkgs/development/python-modules/sphinxcontrib-autoapi/default.nix
index 6822c0f153d3..068c4d5d2e94 100644
--- a/pkgs/development/python-modules/sphinxcontrib-autoapi/default.nix
+++ b/pkgs/development/python-modules/sphinxcontrib-autoapi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
diff --git a/pkgs/development/python-modules/sphinxcontrib-blockdiag/default.nix b/pkgs/development/python-modules/sphinxcontrib-blockdiag/default.nix
index a2603b876e5e..956e3c033b9b 100644
--- a/pkgs/development/python-modules/sphinxcontrib-blockdiag/default.nix
+++ b/pkgs/development/python-modules/sphinxcontrib-blockdiag/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , python
diff --git a/pkgs/development/python-modules/sphinxcontrib-devhelp/default.nix b/pkgs/development/python-modules/sphinxcontrib-devhelp/default.nix
index 7398cbc433ff..1f33c06b984e 100644
--- a/pkgs/development/python-modules/sphinxcontrib-devhelp/default.nix
+++ b/pkgs/development/python-modules/sphinxcontrib-devhelp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/sphinxcontrib-htmlhelp/default.nix b/pkgs/development/python-modules/sphinxcontrib-htmlhelp/default.nix
index 150840f19b40..8ca631a2b3c9 100644
--- a/pkgs/development/python-modules/sphinxcontrib-htmlhelp/default.nix
+++ b/pkgs/development/python-modules/sphinxcontrib-htmlhelp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/sphinxcontrib-jsmath/default.nix b/pkgs/development/python-modules/sphinxcontrib-jsmath/default.nix
index 609799f18647..cd67732605bb 100644
--- a/pkgs/development/python-modules/sphinxcontrib-jsmath/default.nix
+++ b/pkgs/development/python-modules/sphinxcontrib-jsmath/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/sphinxcontrib-openapi/default.nix b/pkgs/development/python-modules/sphinxcontrib-openapi/default.nix
index 6375bdab3c24..a9548305d3bd 100644
--- a/pkgs/development/python-modules/sphinxcontrib-openapi/default.nix
+++ b/pkgs/development/python-modules/sphinxcontrib-openapi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/sphinxcontrib-qthelp/default.nix b/pkgs/development/python-modules/sphinxcontrib-qthelp/default.nix
index adf02860d127..9d16ede62a20 100644
--- a/pkgs/development/python-modules/sphinxcontrib-qthelp/default.nix
+++ b/pkgs/development/python-modules/sphinxcontrib-qthelp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/sphinxcontrib-serializinghtml/default.nix b/pkgs/development/python-modules/sphinxcontrib-serializinghtml/default.nix
index 52ebe15c1b62..b898e9cb67d2 100644
--- a/pkgs/development/python-modules/sphinxcontrib-serializinghtml/default.nix
+++ b/pkgs/development/python-modules/sphinxcontrib-serializinghtml/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/sphinxcontrib-spelling/default.nix b/pkgs/development/python-modules/sphinxcontrib-spelling/default.nix
index a3054f341450..2b5beb4df079 100644
--- a/pkgs/development/python-modules/sphinxcontrib-spelling/default.nix
+++ b/pkgs/development/python-modules/sphinxcontrib-spelling/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
diff --git a/pkgs/development/python-modules/sphinxcontrib_httpdomain/default.nix b/pkgs/development/python-modules/sphinxcontrib_httpdomain/default.nix
index ee652b42d8a1..21ada23d47f4 100644
--- a/pkgs/development/python-modules/sphinxcontrib_httpdomain/default.nix
+++ b/pkgs/development/python-modules/sphinxcontrib_httpdomain/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , sphinx
diff --git a/pkgs/development/python-modules/sphinxcontrib_newsfeed/default.nix b/pkgs/development/python-modules/sphinxcontrib_newsfeed/default.nix
index 2d56b57df9be..a298025f8ba3 100644
--- a/pkgs/development/python-modules/sphinxcontrib_newsfeed/default.nix
+++ b/pkgs/development/python-modules/sphinxcontrib_newsfeed/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , sphinx
diff --git a/pkgs/development/python-modules/sphinxcontrib_plantuml/default.nix b/pkgs/development/python-modules/sphinxcontrib_plantuml/default.nix
index db8997dfd216..e028b6eea80e 100644
--- a/pkgs/development/python-modules/sphinxcontrib_plantuml/default.nix
+++ b/pkgs/development/python-modules/sphinxcontrib_plantuml/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , sphinx
diff --git a/pkgs/development/python-modules/spyder-kernels/default.nix b/pkgs/development/python-modules/spyder-kernels/default.nix
index e0a8d6b9c18a..9533db6e4a73 100644
--- a/pkgs/development/python-modules/spyder-kernels/default.nix
+++ b/pkgs/development/python-modules/spyder-kernels/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, cloudpickle, ipykernel, wurlitzer,
+{ lib, buildPythonPackage, fetchPypi, cloudpickle, ipykernel, wurlitzer,
   jupyter_client, pyzmq }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/spyder/3.nix b/pkgs/development/python-modules/spyder/3.nix
index 34d59d0eb227..0fb98fa38e3d 100644
--- a/pkgs/development/python-modules/spyder/3.nix
+++ b/pkgs/development/python-modules/spyder/3.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, jedi, pycodestyle,
+{ lib, buildPythonPackage, fetchFromGitHub, jedi, pycodestyle,
   psutil, pyflakes, rope, pylint, keyring, numpydoc,
   qtconsole, qtawesome, nbconvert, mccabe, pyopengl, cloudpickle, pygments,
   spyder-kernels_0_5, qtpy, pyzmq, chardet, pyqtwebengine
diff --git a/pkgs/development/python-modules/spyder/default.nix b/pkgs/development/python-modules/spyder/default.nix
index 26013e71158d..e7c94ec724b5 100644
--- a/pkgs/development/python-modules/spyder/default.nix
+++ b/pkgs/development/python-modules/spyder/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy27, makeDesktopItem, intervaltree, jedi, pycodestyle,
+{ lib, buildPythonPackage, fetchPypi, isPy27, makeDesktopItem, intervaltree, jedi, pycodestyle,
   psutil, pyflakes, rope, numpy, scipy, matplotlib, pylint, keyring, numpydoc,
   qtconsole, qtawesome, nbconvert, mccabe, pyopengl, cloudpickle, pygments,
   spyder-kernels, qtpy, pyzmq, chardet, qdarkstyle, watchdog, python-language-server
diff --git a/pkgs/development/python-modules/sqlalchemy-continuum/default.nix b/pkgs/development/python-modules/sqlalchemy-continuum/default.nix
index 4050adc29f55..33b408240fc6 100644
--- a/pkgs/development/python-modules/sqlalchemy-continuum/default.nix
+++ b/pkgs/development/python-modules/sqlalchemy-continuum/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , fetchPypi
 , buildPythonPackage
 , flask
diff --git a/pkgs/development/python-modules/sqlalchemy-i18n/default.nix b/pkgs/development/python-modules/sqlalchemy-i18n/default.nix
index 4ef0adefe3e7..84be4587e66e 100644
--- a/pkgs/development/python-modules/sqlalchemy-i18n/default.nix
+++ b/pkgs/development/python-modules/sqlalchemy-i18n/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , fetchPypi
 , buildPythonPackage
 , sqlalchemy
diff --git a/pkgs/development/python-modules/sqlalchemy-imageattach/default.nix b/pkgs/development/python-modules/sqlalchemy-imageattach/default.nix
index 6a8c910cfce6..15ac7dc3a555 100644
--- a/pkgs/development/python-modules/sqlalchemy-imageattach/default.nix
+++ b/pkgs/development/python-modules/sqlalchemy-imageattach/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , pytest
 , Wand
diff --git a/pkgs/development/python-modules/sqlite3dbm/default.nix b/pkgs/development/python-modules/sqlite3dbm/default.nix
index 1d0b3f15c3fc..3057f89adf4e 100644
--- a/pkgs/development/python-modules/sqlite3dbm/default.nix
+++ b/pkgs/development/python-modules/sqlite3dbm/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/sqlobject/default.nix b/pkgs/development/python-modules/sqlobject/default.nix
index ccbc6659fe3d..f3c438342bce 100644
--- a/pkgs/development/python-modules/sqlobject/default.nix
+++ b/pkgs/development/python-modules/sqlobject/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/squaremap/default.nix b/pkgs/development/python-modules/squaremap/default.nix
index c17a88435dd6..bab9e2f99f28 100644
--- a/pkgs/development/python-modules/squaremap/default.nix
+++ b/pkgs/development/python-modules/squaremap/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , isPy3k
 , fetchPypi
diff --git a/pkgs/development/python-modules/srp/default.nix b/pkgs/development/python-modules/srp/default.nix
index 2afbb22d64e5..c0d3a0a4aedc 100644
--- a/pkgs/development/python-modules/srp/default.nix
+++ b/pkgs/development/python-modules/srp/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, fetchPypi, six, lib }:
+{ buildPythonPackage, fetchPypi, six, lib }:
 
 buildPythonPackage rec {
   pname = "srp";
diff --git a/pkgs/development/python-modules/srptools/default.nix b/pkgs/development/python-modules/srptools/default.nix
index f130009d30d6..68ca009d9dc2 100644
--- a/pkgs/development/python-modules/srptools/default.nix
+++ b/pkgs/development/python-modules/srptools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, six, pytest, pytestrunner }:
+{ lib, buildPythonPackage, fetchPypi, six, pytest, pytestrunner }:
 
 buildPythonPackage rec {
   pname = "srptools";
diff --git a/pkgs/development/python-modules/srsly/default.nix b/pkgs/development/python-modules/srsly/default.nix
index 42320e50fa8d..86b689d09d14 100644
--- a/pkgs/development/python-modules/srsly/default.nix
+++ b/pkgs/development/python-modules/srsly/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
diff --git a/pkgs/development/python-modules/srvlookup/default.nix b/pkgs/development/python-modules/srvlookup/default.nix
index c399ee760fd6..f325d40ba92d 100644
--- a/pkgs/development/python-modules/srvlookup/default.nix
+++ b/pkgs/development/python-modules/srvlookup/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage
+{ lib, fetchPypi, buildPythonPackage
 , dnspython
 , mock, nose
 }:
diff --git a/pkgs/development/python-modules/ssdeep/default.nix b/pkgs/development/python-modules/ssdeep/default.nix
index 8300c3ec2f65..904595865b8c 100644
--- a/pkgs/development/python-modules/ssdeep/default.nix
+++ b/pkgs/development/python-modules/ssdeep/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pkgs
diff --git a/pkgs/development/python-modules/ssdp/default.nix b/pkgs/development/python-modules/ssdp/default.nix
index 82ea4b066a3c..ac39cffa393e 100644
--- a/pkgs/development/python-modules/ssdp/default.nix
+++ b/pkgs/development/python-modules/ssdp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/sseclient/default.nix b/pkgs/development/python-modules/sseclient/default.nix
index 9d944e112fe2..6bbeb23ed1f5 100644
--- a/pkgs/development/python-modules/sseclient/default.nix
+++ b/pkgs/development/python-modules/sseclient/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy27
+{ lib, buildPythonPackage, fetchPypi, isPy27
 , requests, six
 , backports_unittest-mock, pytestCheckHook, pytestrunner }:
 
diff --git a/pkgs/development/python-modules/sslib/default.nix b/pkgs/development/python-modules/sslib/default.nix
index 026ac8a30b75..407053785f09 100644
--- a/pkgs/development/python-modules/sslib/default.nix
+++ b/pkgs/development/python-modules/sslib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, isPy3k }:
+{ lib, fetchPypi, buildPythonPackage, isPy3k }:
 
 buildPythonPackage rec {
   pname = "sslib";
diff --git a/pkgs/development/python-modules/statsd/default.nix b/pkgs/development/python-modules/statsd/default.nix
index 447fed3263c3..561a1d14ca42 100644
--- a/pkgs/development/python-modules/statsd/default.nix
+++ b/pkgs/development/python-modules/statsd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/stompclient/default.nix b/pkgs/development/python-modules/stompclient/default.nix
index 17bafbad282e..149be55da580 100644
--- a/pkgs/development/python-modules/stompclient/default.nix
+++ b/pkgs/development/python-modules/stompclient/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/strict-rfc3339/default.nix b/pkgs/development/python-modules/strict-rfc3339/default.nix
index 53701999b021..e76365a525ad 100644
--- a/pkgs/development/python-modules/strict-rfc3339/default.nix
+++ b/pkgs/development/python-modules/strict-rfc3339/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "strict-rfc3339";
diff --git a/pkgs/development/python-modules/stringcase/default.nix b/pkgs/development/python-modules/stringcase/default.nix
index 10afb5113931..e02cc0384f9a 100644
--- a/pkgs/development/python-modules/stringcase/default.nix
+++ b/pkgs/development/python-modules/stringcase/default.nix
@@ -1,4 +1,4 @@
-{ buildPythonPackage, fetchPypi, lib, stdenv
+{ buildPythonPackage, fetchPypi, lib
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/subdownloader/default.nix b/pkgs/development/python-modules/subdownloader/default.nix
index 2dac94ac15d2..2b536fa0e628 100644
--- a/pkgs/development/python-modules/subdownloader/default.nix
+++ b/pkgs/development/python-modules/subdownloader/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , mmpython
diff --git a/pkgs/development/python-modules/suds-jurko/default.nix b/pkgs/development/python-modules/suds-jurko/default.nix
index 4bf74fe00b4e..af307919387f 100644
--- a/pkgs/development/python-modules/suds-jurko/default.nix
+++ b/pkgs/development/python-modules/suds-jurko/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPyPy
diff --git a/pkgs/development/python-modules/suds/default.nix b/pkgs/development/python-modules/suds/default.nix
index 24425fef95f1..1a96df26da1d 100644
--- a/pkgs/development/python-modules/suds/default.nix
+++ b/pkgs/development/python-modules/suds/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/sumo/default.nix b/pkgs/development/python-modules/sumo/default.nix
index e647cd4a9d27..e1b3d8c705eb 100644
--- a/pkgs/development/python-modules/sumo/default.nix
+++ b/pkgs/development/python-modules/sumo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, isPy27
+{ lib, buildPythonPackage, fetchFromGitHub, isPy27
 , h5py
 , matplotlib
 , numpy
diff --git a/pkgs/development/python-modules/sure/default.nix b/pkgs/development/python-modules/sure/default.nix
index efff79f679f4..ee21e9c45168 100644
--- a/pkgs/development/python-modules/sure/default.nix
+++ b/pkgs/development/python-modules/sure/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , rednose
diff --git a/pkgs/development/python-modules/survey/default.nix b/pkgs/development/python-modules/survey/default.nix
index f9bec0451ff4..436127fae9c4 100644
--- a/pkgs/development/python-modules/survey/default.nix
+++ b/pkgs/development/python-modules/survey/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , wrapio
diff --git a/pkgs/development/python-modules/svg-path/default.nix b/pkgs/development/python-modules/svg-path/default.nix
index 585dbf64b3c3..820d4121633b 100644
--- a/pkgs/development/python-modules/svg-path/default.nix
+++ b/pkgs/development/python-modules/svg-path/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 buildPythonPackage rec {
   pname = "svg.path";
   version = "4.0.2";
diff --git a/pkgs/development/python-modules/svg2tikz/default.nix b/pkgs/development/python-modules/svg2tikz/default.nix
index fb0475ef3b97..38516ab73c3e 100644
--- a/pkgs/development/python-modules/svg2tikz/default.nix
+++ b/pkgs/development/python-modules/svg2tikz/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchgit
 , lxml
diff --git a/pkgs/development/python-modules/swagger-ui-bundle/default.nix b/pkgs/development/python-modules/swagger-ui-bundle/default.nix
index 613de201b2d1..9dbd29739fe8 100644
--- a/pkgs/development/python-modules/swagger-ui-bundle/default.nix
+++ b/pkgs/development/python-modules/swagger-ui-bundle/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, jinja2, flake8 }:
+{ lib, buildPythonPackage, fetchPypi, jinja2, flake8 }:
 
 buildPythonPackage rec {
   pname = "swagger-ui-bundle";
diff --git a/pkgs/development/python-modules/swspotify/default.nix b/pkgs/development/python-modules/swspotify/default.nix
index 321a48e72b6f..e213e9e265ef 100644
--- a/pkgs/development/python-modules/swspotify/default.nix
+++ b/pkgs/development/python-modules/swspotify/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonPackage, fetchFromGitHub, requests, flask-cors, dbus-python, pytestCheckHook, mock, isPy27 }:
+{ lib, buildPythonPackage, fetchFromGitHub, requests, flask-cors, dbus-python, pytestCheckHook, mock, isPy27 }:
 
 buildPythonPackage rec {
   pname = "SwSpotify";
diff --git a/pkgs/development/python-modules/sybase/default.nix b/pkgs/development/python-modules/sybase/default.nix
index 20c2a158a3b2..5a14e7e7f40e 100644
--- a/pkgs/development/python-modules/sybase/default.nix
+++ b/pkgs/development/python-modules/sybase/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , isPy3k
diff --git a/pkgs/development/python-modules/systemd/default.nix b/pkgs/development/python-modules/systemd/default.nix
index 2035ce8b26ba..86c330bd1d88 100644
--- a/pkgs/development/python-modules/systemd/default.nix
+++ b/pkgs/development/python-modules/systemd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, systemd, pkg-config }:
+{ lib, buildPythonPackage, fetchFromGitHub, systemd, pkg-config }:
 
 buildPythonPackage rec {
   pname = "systemd";
diff --git a/pkgs/development/python-modules/sysv_ipc/default.nix b/pkgs/development/python-modules/sysv_ipc/default.nix
index 87a81e4fb17d..5d9b5a034c2b 100644
--- a/pkgs/development/python-modules/sysv_ipc/default.nix
+++ b/pkgs/development/python-modules/sysv_ipc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/tarman/default.nix b/pkgs/development/python-modules/tarman/default.nix
index 682da22ced8a..c2a2c4405e28 100644
--- a/pkgs/development/python-modules/tarman/default.nix
+++ b/pkgs/development/python-modules/tarman/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/taskw/default.nix b/pkgs/development/python-modules/taskw/default.nix
index 5a1358947130..9e1ae3302c12 100644
--- a/pkgs/development/python-modules/taskw/default.nix
+++ b/pkgs/development/python-modules/taskw/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/tatsu/default.nix b/pkgs/development/python-modules/tatsu/default.nix
index cba34a95a7bd..540c315c8ff6 100644
--- a/pkgs/development/python-modules/tatsu/default.nix
+++ b/pkgs/development/python-modules/tatsu/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, pythonOlder
+{ lib, buildPythonPackage, fetchFromGitHub, pythonOlder
 , colorama, mypy, pyyaml, regex
 , dataclasses, typing
 , pytestrunner, pytest-mypy
diff --git a/pkgs/development/python-modules/tblib/default.nix b/pkgs/development/python-modules/tblib/default.nix
index 7e704e0b2c60..2f06b665d33f 100644
--- a/pkgs/development/python-modules/tblib/default.nix
+++ b/pkgs/development/python-modules/tblib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "tblib";
diff --git a/pkgs/development/python-modules/telegram/default.nix b/pkgs/development/python-modules/telegram/default.nix
index 95293d095fd5..c297efc0efdd 100644
--- a/pkgs/development/python-modules/telegram/default.nix
+++ b/pkgs/development/python-modules/telegram/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/tensorflow-estimator/default.nix b/pkgs/development/python-modules/tensorflow-estimator/default.nix
index bca75224fa3e..dd3b4641beaf 100644
--- a/pkgs/development/python-modules/tensorflow-estimator/default.nix
+++ b/pkgs/development/python-modules/tensorflow-estimator/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage
+{ lib, fetchPypi, buildPythonPackage
 , numpy
 , absl-py
 , mock
diff --git a/pkgs/development/python-modules/termcolor/default.nix b/pkgs/development/python-modules/termcolor/default.nix
index df0f4d6208a3..e440dab114fa 100644
--- a/pkgs/development/python-modules/termcolor/default.nix
+++ b/pkgs/development/python-modules/termcolor/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/terminaltables/default.nix b/pkgs/development/python-modules/terminaltables/default.nix
index 28e49316ad71..51a0b0712240 100644
--- a/pkgs/development/python-modules/terminaltables/default.nix
+++ b/pkgs/development/python-modules/terminaltables/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/testpath/default.nix b/pkgs/development/python-modules/testpath/default.nix
index a5ab52e5cdd5..c95bd0c78b66 100644
--- a/pkgs/development/python-modules/testpath/default.nix
+++ b/pkgs/development/python-modules/testpath/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/testrepository/default.nix b/pkgs/development/python-modules/testrepository/default.nix
index c249ca212b6d..45093a5f7cf7 100644
--- a/pkgs/development/python-modules/testrepository/default.nix
+++ b/pkgs/development/python-modules/testrepository/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , testtools
diff --git a/pkgs/development/python-modules/testscenarios/default.nix b/pkgs/development/python-modules/testscenarios/default.nix
index 465384edcb0c..8df35ac4b889 100644
--- a/pkgs/development/python-modules/testscenarios/default.nix
+++ b/pkgs/development/python-modules/testscenarios/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , testtools
diff --git a/pkgs/development/python-modules/threadpool/default.nix b/pkgs/development/python-modules/threadpool/default.nix
index 7a1696feb665..9c83e7e45c28 100644
--- a/pkgs/development/python-modules/threadpool/default.nix
+++ b/pkgs/development/python-modules/threadpool/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/thrift/default.nix b/pkgs/development/python-modules/thrift/default.nix
index c7279b867b10..7b16d6668705 100644
--- a/pkgs/development/python-modules/thrift/default.nix
+++ b/pkgs/development/python-modules/thrift/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/thumborpexif/default.nix b/pkgs/development/python-modules/thumborpexif/default.nix
index abfad4ffaac9..28b2e5a9f93c 100644
--- a/pkgs/development/python-modules/thumborpexif/default.nix
+++ b/pkgs/development/python-modules/thumborpexif/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/tilestache/default.nix b/pkgs/development/python-modules/tilestache/default.nix
index 170360c133ed..ce46fd56f243 100644
--- a/pkgs/development/python-modules/tilestache/default.nix
+++ b/pkgs/development/python-modules/tilestache/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , modestmaps
diff --git a/pkgs/development/python-modules/timelib/default.nix b/pkgs/development/python-modules/timelib/default.nix
index 65b121ddfafd..e2f3cc1d3cc8 100644
--- a/pkgs/development/python-modules/timelib/default.nix
+++ b/pkgs/development/python-modules/timelib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/timeout-decorator/default.nix b/pkgs/development/python-modules/timeout-decorator/default.nix
index b1160cafe309..c2d21fea153f 100644
--- a/pkgs/development/python-modules/timeout-decorator/default.nix
+++ b/pkgs/development/python-modules/timeout-decorator/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 buildPythonPackage rec {
   pname = "timeout-decorator";
   version = "0.5.0";
diff --git a/pkgs/development/python-modules/tissue/default.nix b/pkgs/development/python-modules/tissue/default.nix
index fc4316c98fe9..e1ef7f9edf46 100644
--- a/pkgs/development/python-modules/tissue/default.nix
+++ b/pkgs/development/python-modules/tissue/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/tlsh/default.nix b/pkgs/development/python-modules/tlsh/default.nix
index 302b113364d2..7be95b970888 100644
--- a/pkgs/development/python-modules/tlsh/default.nix
+++ b/pkgs/development/python-modules/tlsh/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , cmake
diff --git a/pkgs/development/python-modules/tlslite-ng/default.nix b/pkgs/development/python-modules/tlslite-ng/default.nix
index a952c95d93e4..37751890c7b3 100644
--- a/pkgs/development/python-modules/tlslite-ng/default.nix
+++ b/pkgs/development/python-modules/tlslite-ng/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , ecdsa
diff --git a/pkgs/development/python-modules/tlslite/default.nix b/pkgs/development/python-modules/tlslite/default.nix
index a1e78c5db76c..52b662be2b2e 100644
--- a/pkgs/development/python-modules/tlslite/default.nix
+++ b/pkgs/development/python-modules/tlslite/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/toggl-cli/default.nix b/pkgs/development/python-modules/toggl-cli/default.nix
index 875e70cee58e..d7eece650026 100644
--- a/pkgs/development/python-modules/toggl-cli/default.nix
+++ b/pkgs/development/python-modules/toggl-cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pythonAtLeast, pythonOlder
+{ lib, buildPythonPackage, fetchPypi, pythonAtLeast, pythonOlder
 , click
 , click-completion
 , factory_boy
diff --git a/pkgs/development/python-modules/tokenizers/default.nix b/pkgs/development/python-modules/tokenizers/default.nix
index ec435a0ac359..cf122613f633 100644
--- a/pkgs/development/python-modules/tokenizers/default.nix
+++ b/pkgs/development/python-modules/tokenizers/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , rustPlatform
 , fetchFromGitHub
 , fetchurl
diff --git a/pkgs/development/python-modules/tokenlib/default.nix b/pkgs/development/python-modules/tokenlib/default.nix
index 2bed18870166..bed053f82826 100644
--- a/pkgs/development/python-modules/tokenlib/default.nix
+++ b/pkgs/development/python-modules/tokenlib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , requests
diff --git a/pkgs/development/python-modules/toml/default.nix b/pkgs/development/python-modules/toml/default.nix
index 0d0d87c73d11..bdc1b141eed7 100644
--- a/pkgs/development/python-modules/toml/default.nix
+++ b/pkgs/development/python-modules/toml/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "toml";
diff --git a/pkgs/development/python-modules/toposort/default.nix b/pkgs/development/python-modules/toposort/default.nix
index 43df3c4e21e9..540835c7e310 100644
--- a/pkgs/development/python-modules/toposort/default.nix
+++ b/pkgs/development/python-modules/toposort/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/torchvision/default.nix b/pkgs/development/python-modules/torchvision/default.nix
index 928616eb4f8a..79f6a19ffcb5 100644
--- a/pkgs/development/python-modules/torchvision/default.nix
+++ b/pkgs/development/python-modules/torchvision/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , ninja
diff --git a/pkgs/development/python-modules/traceback2/default.nix b/pkgs/development/python-modules/traceback2/default.nix
index 5309ae47a02d..040874286bde 100644
--- a/pkgs/development/python-modules/traceback2/default.nix
+++ b/pkgs/development/python-modules/traceback2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pbr
diff --git a/pkgs/development/python-modules/tracing/default.nix b/pkgs/development/python-modules/tracing/default.nix
index f4c01f003a9a..c2adc9ec9c5a 100644
--- a/pkgs/development/python-modules/tracing/default.nix
+++ b/pkgs/development/python-modules/tracing/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , sphinx
diff --git a/pkgs/development/python-modules/traits/default.nix b/pkgs/development/python-modules/traits/default.nix
index e3bc8b43fe4e..d9986dd87fe1 100644
--- a/pkgs/development/python-modules/traits/default.nix
+++ b/pkgs/development/python-modules/traits/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/transaction/default.nix b/pkgs/development/python-modules/transaction/default.nix
index def2559a72d0..6bb5987ba484 100644
--- a/pkgs/development/python-modules/transaction/default.nix
+++ b/pkgs/development/python-modules/transaction/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchPypi
 , buildPythonPackage
 , zope_interface
diff --git a/pkgs/development/python-modules/transformers/default.nix b/pkgs/development/python-modules/transformers/default.nix
index 594204754408..efc33ad8a23f 100644
--- a/pkgs/development/python-modules/transformers/default.nix
+++ b/pkgs/development/python-modules/transformers/default.nix
@@ -1,5 +1,5 @@
 { buildPythonPackage
-, lib, stdenv
+, lib
 , fetchFromGitHub
 , pythonOlder
 , cookiecutter
diff --git a/pkgs/development/python-modules/transip/default.nix b/pkgs/development/python-modules/transip/default.nix
index e270d5a0662d..94d3cb85be40 100644
--- a/pkgs/development/python-modules/transip/default.nix
+++ b/pkgs/development/python-modules/transip/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , isPy27
diff --git a/pkgs/development/python-modules/translationstring/default.nix b/pkgs/development/python-modules/translationstring/default.nix
index 2f39b57b480f..f7036128e08e 100644
--- a/pkgs/development/python-modules/translationstring/default.nix
+++ b/pkgs/development/python-modules/translationstring/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/transmissionrpc/default.nix b/pkgs/development/python-modules/transmissionrpc/default.nix
index a128b150579a..39901a17f00f 100644
--- a/pkgs/development/python-modules/transmissionrpc/default.nix
+++ b/pkgs/development/python-modules/transmissionrpc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/treq/default.nix b/pkgs/development/python-modules/treq/default.nix
index 477223e96186..447e2a5b9863 100644
--- a/pkgs/development/python-modules/treq/default.nix
+++ b/pkgs/development/python-modules/treq/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, service-identity, requests, six
+{ lib, fetchPypi, buildPythonPackage, service-identity, requests, six
 , mock, twisted, incremental, pep8, httpbin
 }:
 
diff --git a/pkgs/development/python-modules/trezor_agent/default.nix b/pkgs/development/python-modules/trezor_agent/default.nix
index 537b4db7995a..cef74c8636b7 100644
--- a/pkgs/development/python-modules/trezor_agent/default.nix
+++ b/pkgs/development/python-modules/trezor_agent/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , trezor
diff --git a/pkgs/development/python-modules/trueskill/default.nix b/pkgs/development/python-modules/trueskill/default.nix
index 0c3efa404ec6..db16ed7fafbc 100644
--- a/pkgs/development/python-modules/trueskill/default.nix
+++ b/pkgs/development/python-modules/trueskill/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , six }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/ttystatus/default.nix b/pkgs/development/python-modules/ttystatus/default.nix
index 24eb10637078..f32045ce9cde 100644
--- a/pkgs/development/python-modules/ttystatus/default.nix
+++ b/pkgs/development/python-modules/ttystatus/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , sphinx
diff --git a/pkgs/development/python-modules/tvdb_api/default.nix b/pkgs/development/python-modules/tvdb_api/default.nix
index f2cdbe8dc633..845aff673b76 100644
--- a/pkgs/development/python-modules/tvdb_api/default.nix
+++ b/pkgs/development/python-modules/tvdb_api/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , requests-cache
diff --git a/pkgs/development/python-modules/tvnamer/default.nix b/pkgs/development/python-modules/tvnamer/default.nix
index fa155b86f407..6a720421c72f 100644
--- a/pkgs/development/python-modules/tvnamer/default.nix
+++ b/pkgs/development/python-modules/tvnamer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/twiggy/default.nix b/pkgs/development/python-modules/twiggy/default.nix
index 9647dc8ae67c..45e59860227a 100644
--- a/pkgs/development/python-modules/twiggy/default.nix
+++ b/pkgs/development/python-modules/twiggy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/twilio/default.nix b/pkgs/development/python-modules/twilio/default.nix
index 7931a4ad0ec9..ff4bb845c899 100644
--- a/pkgs/development/python-modules/twilio/default.nix
+++ b/pkgs/development/python-modules/twilio/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub
+{ lib, buildPythonPackage, fetchFromGitHub
 , pyjwt, pysocks, pytz, requests, six, nose, mock }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/twitter-common-collections/default.nix b/pkgs/development/python-modules/twitter-common-collections/default.nix
index 72f30514dc67..644a97d2b2ec 100644
--- a/pkgs/development/python-modules/twitter-common-collections/default.nix
+++ b/pkgs/development/python-modules/twitter-common-collections/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , twitter-common-lang
diff --git a/pkgs/development/python-modules/twitter-common-confluence/default.nix b/pkgs/development/python-modules/twitter-common-confluence/default.nix
index ee5bf9bdbe10..d718a18822be 100644
--- a/pkgs/development/python-modules/twitter-common-confluence/default.nix
+++ b/pkgs/development/python-modules/twitter-common-confluence/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , twitter-common-log
diff --git a/pkgs/development/python-modules/twitter-common-dirutil/default.nix b/pkgs/development/python-modules/twitter-common-dirutil/default.nix
index 14b0bcd0673c..bf9ec099ddba 100644
--- a/pkgs/development/python-modules/twitter-common-dirutil/default.nix
+++ b/pkgs/development/python-modules/twitter-common-dirutil/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , twitter-common-lang
diff --git a/pkgs/development/python-modules/twitter-common-lang/default.nix b/pkgs/development/python-modules/twitter-common-lang/default.nix
index 4b4a5c0fc2e2..93178f467921 100644
--- a/pkgs/development/python-modules/twitter-common-lang/default.nix
+++ b/pkgs/development/python-modules/twitter-common-lang/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/twitter-common-log/default.nix b/pkgs/development/python-modules/twitter-common-log/default.nix
index 8cf99c39dc20..61f5d99a8f1c 100644
--- a/pkgs/development/python-modules/twitter-common-log/default.nix
+++ b/pkgs/development/python-modules/twitter-common-log/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , twitter-common-options
diff --git a/pkgs/development/python-modules/twitter-common-options/default.nix b/pkgs/development/python-modules/twitter-common-options/default.nix
index a5505330bc0a..b3ae7f7f5d94 100644
--- a/pkgs/development/python-modules/twitter-common-options/default.nix
+++ b/pkgs/development/python-modules/twitter-common-options/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/twitter/default.nix b/pkgs/development/python-modules/twitter/default.nix
index 23d647d93153..7114dc661f42 100644
--- a/pkgs/development/python-modules/twitter/default.nix
+++ b/pkgs/development/python-modules/twitter/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/txaio/default.nix b/pkgs/development/python-modules/txaio/default.nix
index 4d756fa89f3f..814b6234ee3b 100644
--- a/pkgs/development/python-modules/txaio/default.nix
+++ b/pkgs/development/python-modules/txaio/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest, mock, six, twisted, isPy37, isPy27 }:
+{ lib, buildPythonPackage, fetchPypi, pytest, mock, six, twisted, isPy37, isPy27 }:
 
 buildPythonPackage rec {
   pname = "txaio";
diff --git a/pkgs/development/python-modules/txamqp/default.nix b/pkgs/development/python-modules/txamqp/default.nix
index f0e3904a8815..cc66e041ae38 100644
--- a/pkgs/development/python-modules/txamqp/default.nix
+++ b/pkgs/development/python-modules/txamqp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , twisted
diff --git a/pkgs/development/python-modules/txdbus/default.nix b/pkgs/development/python-modules/txdbus/default.nix
index 461ddeee34b4..31afbd4fdf95 100644
--- a/pkgs/development/python-modules/txdbus/default.nix
+++ b/pkgs/development/python-modules/txdbus/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, six, twisted }:
+{ lib, buildPythonPackage, fetchPypi, six, twisted }:
 
 buildPythonPackage rec {
   pname = "txdbus";
diff --git a/pkgs/development/python-modules/txgithub/default.nix b/pkgs/development/python-modules/txgithub/default.nix
index 402e5011ede6..09af476e94df 100644
--- a/pkgs/development/python-modules/txgithub/default.nix
+++ b/pkgs/development/python-modules/txgithub/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pyopenssl
diff --git a/pkgs/development/python-modules/txrequests/default.nix b/pkgs/development/python-modules/txrequests/default.nix
index 06979e2b9b39..be32dc4a7387 100644
--- a/pkgs/development/python-modules/txrequests/default.nix
+++ b/pkgs/development/python-modules/txrequests/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , twisted
diff --git a/pkgs/development/python-modules/typeguard/default.nix b/pkgs/development/python-modules/typeguard/default.nix
index 448e52af7afa..7aced09b33da 100644
--- a/pkgs/development/python-modules/typeguard/default.nix
+++ b/pkgs/development/python-modules/typeguard/default.nix
@@ -1,7 +1,7 @@
 { buildPythonPackage
 , fetchPypi
 , pythonOlder
-, lib, stdenv
+, lib
 , setuptools_scm
 , pytest
 , typing-extensions
diff --git a/pkgs/development/python-modules/typogrify/default.nix b/pkgs/development/python-modules/typogrify/default.nix
index faa1c8641c05..25445d8a7d29 100644
--- a/pkgs/development/python-modules/typogrify/default.nix
+++ b/pkgs/development/python-modules/typogrify/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPyPy
diff --git a/pkgs/development/python-modules/tzlocal/default.nix b/pkgs/development/python-modules/tzlocal/default.nix
index df0923833fd5..a7cd91d6845b 100644
--- a/pkgs/development/python-modules/tzlocal/default.nix
+++ b/pkgs/development/python-modules/tzlocal/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , pytz }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/ua-parser/default.nix b/pkgs/development/python-modules/ua-parser/default.nix
index 370ed527d193..36d725d14f45 100644
--- a/pkgs/development/python-modules/ua-parser/default.nix
+++ b/pkgs/development/python-modules/ua-parser/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pyyaml }:
+{ lib, buildPythonPackage, fetchPypi, pyyaml }:
 
 buildPythonPackage rec {
   pname = "ua-parser";
diff --git a/pkgs/development/python-modules/ujson/2.nix b/pkgs/development/python-modules/ujson/2.nix
index f31b26a1960a..36aa5a020c35 100644
--- a/pkgs/development/python-modules/ujson/2.nix
+++ b/pkgs/development/python-modules/ujson/2.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , setuptools_scm
diff --git a/pkgs/development/python-modules/ujson/default.nix b/pkgs/development/python-modules/ujson/default.nix
index 1c12a092a2f5..9c759bd41b36 100644
--- a/pkgs/development/python-modules/ujson/default.nix
+++ b/pkgs/development/python-modules/ujson/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/umalqurra/default.nix b/pkgs/development/python-modules/umalqurra/default.nix
index 4411dbac11b8..0e1b4c681e5b 100644
--- a/pkgs/development/python-modules/umalqurra/default.nix
+++ b/pkgs/development/python-modules/umalqurra/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/umemcache/default.nix b/pkgs/development/python-modules/umemcache/default.nix
index f852483cda68..26f8ba02756c 100644
--- a/pkgs/development/python-modules/umemcache/default.nix
+++ b/pkgs/development/python-modules/umemcache/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, isPy3k, fetchurl }:
+{ lib, buildPythonPackage, isPy3k, fetchurl }:
 
 buildPythonPackage rec {
   pname = "umemcache";
diff --git a/pkgs/development/python-modules/uncertainties/default.nix b/pkgs/development/python-modules/uncertainties/default.nix
index 117188198ca8..b43927c063ec 100644
--- a/pkgs/development/python-modules/uncertainties/default.nix
+++ b/pkgs/development/python-modules/uncertainties/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage
+{ lib, fetchPypi, buildPythonPackage
 , nose, numpy, future
 }:
 
diff --git a/pkgs/development/python-modules/uncompyle6/default.nix b/pkgs/development/python-modules/uncompyle6/default.nix
index 4f8d461c87e2..31095fcd50e6 100644
--- a/pkgs/development/python-modules/uncompyle6/default.nix
+++ b/pkgs/development/python-modules/uncompyle6/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonAtLeast
diff --git a/pkgs/development/python-modules/unicode-slugify/default.nix b/pkgs/development/python-modules/unicode-slugify/default.nix
index 80ac5151b53f..a0574f948f0d 100644
--- a/pkgs/development/python-modules/unicode-slugify/default.nix
+++ b/pkgs/development/python-modules/unicode-slugify/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/unicodecsv/default.nix b/pkgs/development/python-modules/unicodecsv/default.nix
index 9393ff58bc27..ede2b0d3f093 100644
--- a/pkgs/development/python-modules/unicodecsv/default.nix
+++ b/pkgs/development/python-modules/unicodecsv/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/unidecode/default.nix b/pkgs/development/python-modules/unidecode/default.nix
index 34de3d713866..70724bb71b51 100644
--- a/pkgs/development/python-modules/unidecode/default.nix
+++ b/pkgs/development/python-modules/unidecode/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, glibcLocales }:
+{ lib, buildPythonPackage, fetchPypi, glibcLocales }:
 
 buildPythonPackage rec {
   pname = "Unidecode";
diff --git a/pkgs/development/python-modules/unifi/default.nix b/pkgs/development/python-modules/unifi/default.nix
index 66ab9ba3972b..fc98695dd6fa 100644
--- a/pkgs/development/python-modules/unifi/default.nix
+++ b/pkgs/development/python-modules/unifi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage
+{ lib, buildPythonPackage
 , fetchPypi, urllib3 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/unittest2/default.nix b/pkgs/development/python-modules/unittest2/default.nix
index a7c1252f4b46..ae8cab53b0c5 100644
--- a/pkgs/development/python-modules/unittest2/default.nix
+++ b/pkgs/development/python-modules/unittest2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/unpaddedbase64/default.nix b/pkgs/development/python-modules/unpaddedbase64/default.nix
index 52d2a42b4baf..96b27127cc60 100644
--- a/pkgs/development/python-modules/unpaddedbase64/default.nix
+++ b/pkgs/development/python-modules/unpaddedbase64/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 }:
diff --git a/pkgs/development/python-modules/upass/default.nix b/pkgs/development/python-modules/upass/default.nix
index 442876d7a975..61197c7219da 100644
--- a/pkgs/development/python-modules/upass/default.nix
+++ b/pkgs/development/python-modules/upass/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , pyperclip
diff --git a/pkgs/development/python-modules/update_checker/default.nix b/pkgs/development/python-modules/update_checker/default.nix
index f9171e8cbc9d..432232c60f91 100644
--- a/pkgs/development/python-modules/update_checker/default.nix
+++ b/pkgs/development/python-modules/update_checker/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, requests, isPy27
+{ lib, buildPythonPackage, fetchPypi, requests, isPy27
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/uproot3-methods/default.nix b/pkgs/development/python-modules/uproot3-methods/default.nix
index 5164bf854ada..21fe31630de6 100644
--- a/pkgs/development/python-modules/uproot3-methods/default.nix
+++ b/pkgs/development/python-modules/uproot3-methods/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , numpy
diff --git a/pkgs/development/python-modules/uptime/default.nix b/pkgs/development/python-modules/uptime/default.nix
index 8f8c067d36ae..640d2a6ed570 100644
--- a/pkgs/development/python-modules/uptime/default.nix
+++ b/pkgs/development/python-modules/uptime/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/uranium/default.nix b/pkgs/development/python-modules/uranium/default.nix
index f5bca2ed0fef..ff262d6b0a32 100644
--- a/pkgs/development/python-modules/uranium/default.nix
+++ b/pkgs/development/python-modules/uranium/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, python, cmake
+{ lib, buildPythonPackage, fetchFromGitHub, python, cmake
 , pyqt5, numpy, scipy, shapely, libarcus, doxygen, gettext, pythonOlder }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/uritools/default.nix b/pkgs/development/python-modules/uritools/default.nix
index b06da7c6acc7..2f4710eea46b 100644
--- a/pkgs/development/python-modules/uritools/default.nix
+++ b/pkgs/development/python-modules/uritools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy27 }:
+{ lib, buildPythonPackage, fetchPypi, isPy27 }:
 
 buildPythonPackage rec {
   pname = "uritools";
diff --git a/pkgs/development/python-modules/urlgrabber/default.nix b/pkgs/development/python-modules/urlgrabber/default.nix
index 3a7158be73c8..e78dc9b904dc 100644
--- a/pkgs/development/python-modules/urlgrabber/default.nix
+++ b/pkgs/development/python-modules/urlgrabber/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pycurl, six }:
+{ lib, buildPythonPackage, fetchPypi, pycurl, six }:
 
 buildPythonPackage rec {
   pname = "urlgrabber";
diff --git a/pkgs/development/python-modules/urwid/default.nix b/pkgs/development/python-modules/urwid/default.nix
index e3c5311136c2..ceb57e86afb3 100644
--- a/pkgs/development/python-modules/urwid/default.nix
+++ b/pkgs/development/python-modules/urwid/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k, isPy27, glibcLocales }:
+{ lib, buildPythonPackage, fetchPypi, isPy3k, isPy27, glibcLocales }:
 
 buildPythonPackage rec {
   pname = "urwid";
diff --git a/pkgs/development/python-modules/urwidtrees/default.nix b/pkgs/development/python-modules/urwidtrees/default.nix
index 4c3a3e896f86..863989156c3d 100644
--- a/pkgs/development/python-modules/urwidtrees/default.nix
+++ b/pkgs/development/python-modules/urwidtrees/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , glibcLocales
diff --git a/pkgs/development/python-modules/usbtmc/default.nix b/pkgs/development/python-modules/usbtmc/default.nix
index b1f5b301dee4..6dbb6ce184ff 100644
--- a/pkgs/development/python-modules/usbtmc/default.nix
+++ b/pkgs/development/python-modules/usbtmc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, buildPythonPackage, pyusb }:
+{ lib, fetchurl, buildPythonPackage, pyusb }:
 
 buildPythonPackage rec {
   pname = "usbtmc";
diff --git a/pkgs/development/python-modules/user-agents/default.nix b/pkgs/development/python-modules/user-agents/default.nix
index 7f8470cfbdc8..d01c601c82a0 100644
--- a/pkgs/development/python-modules/user-agents/default.nix
+++ b/pkgs/development/python-modules/user-agents/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, ua-parser }:
+{ lib, buildPythonPackage, fetchFromGitHub, ua-parser }:
 
 buildPythonPackage rec {
   pname = "user-agents";
diff --git a/pkgs/development/python-modules/validate-email/default.nix b/pkgs/development/python-modules/validate-email/default.nix
index 327cfcf3f0d3..2b1fdb4963d5 100644
--- a/pkgs/development/python-modules/validate-email/default.nix
+++ b/pkgs/development/python-modules/validate-email/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "validate-email";
diff --git a/pkgs/development/python-modules/validictory/default.nix b/pkgs/development/python-modules/validictory/default.nix
index e89b3d7bcd23..29ffb76591ef 100644
--- a/pkgs/development/python-modules/validictory/default.nix
+++ b/pkgs/development/python-modules/validictory/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/vcversioner/default.nix b/pkgs/development/python-modules/vcversioner/default.nix
index 7d73a6e812dd..236bb8d149b6 100644
--- a/pkgs/development/python-modules/vcversioner/default.nix
+++ b/pkgs/development/python-modules/vcversioner/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "vcversioner";
diff --git a/pkgs/development/python-modules/vdf/default.nix b/pkgs/development/python-modules/vdf/default.nix
index 9e4e92d21ae7..846aa7a13dfc 100644
--- a/pkgs/development/python-modules/vdf/default.nix
+++ b/pkgs/development/python-modules/vdf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub
+{ lib, buildPythonPackage, fetchFromGitHub
 , pytest, pytestcov, mock }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/vdirsyncer/default.nix b/pkgs/development/python-modules/vdirsyncer/default.nix
index bda65ab49076..1f7642bfe347 100644
--- a/pkgs/development/python-modules/vdirsyncer/default.nix
+++ b/pkgs/development/python-modules/vdirsyncer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/vega/default.nix b/pkgs/development/python-modules/vega/default.nix
index 3a36d5de6064..083aa6302098 100644
--- a/pkgs/development/python-modules/vega/default.nix
+++ b/pkgs/development/python-modules/vega/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage , fetchPypi, pythonOlder
+{ lib, buildPythonPackage , fetchPypi, pythonOlder
 , pytest, jupyter_core, pandas, ipywidgets, jupyter, altair }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/venusian/default.nix b/pkgs/development/python-modules/venusian/default.nix
index 68d974aabec8..82e291ae4623 100644
--- a/pkgs/development/python-modules/venusian/default.nix
+++ b/pkgs/development/python-modules/venusian/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/versioneer/default.nix b/pkgs/development/python-modules/versioneer/default.nix
index fa3329503a36..3685e78d4b4e 100644
--- a/pkgs/development/python-modules/versioneer/default.nix
+++ b/pkgs/development/python-modules/versioneer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy27 }:
+{ lib, buildPythonPackage, fetchPypi, isPy27 }:
 
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/versiontools/default.nix b/pkgs/development/python-modules/versiontools/default.nix
index 45b34d95301d..f74c8610b4cc 100644
--- a/pkgs/development/python-modules/versiontools/default.nix
+++ b/pkgs/development/python-modules/versiontools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/veryprettytable/default.nix b/pkgs/development/python-modules/veryprettytable/default.nix
index f2c8cee451d3..003fd6db621c 100644
--- a/pkgs/development/python-modules/veryprettytable/default.nix
+++ b/pkgs/development/python-modules/veryprettytable/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , termcolor
diff --git a/pkgs/development/python-modules/vidstab/default.nix b/pkgs/development/python-modules/vidstab/default.nix
index 548105a01778..4119b26259d7 100644
--- a/pkgs/development/python-modules/vidstab/default.nix
+++ b/pkgs/development/python-modules/vidstab/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , numpy
diff --git a/pkgs/development/python-modules/vine/default.nix b/pkgs/development/python-modules/vine/default.nix
index 048fa435e0be..8fc895cfa44c 100644
--- a/pkgs/development/python-modules/vine/default.nix
+++ b/pkgs/development/python-modules/vine/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , case, pytest, pythonOlder }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/virtualenv-clone/default.nix b/pkgs/development/python-modules/virtualenv-clone/default.nix
index 9b225021cf21..4dfebc13075f 100644
--- a/pkgs/development/python-modules/virtualenv-clone/default.nix
+++ b/pkgs/development/python-modules/virtualenv-clone/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/virtualenvwrapper/default.nix b/pkgs/development/python-modules/virtualenvwrapper/default.nix
index 658f41126fc9..087a1a2ca517 100644
--- a/pkgs/development/python-modules/virtualenvwrapper/default.nix
+++ b/pkgs/development/python-modules/virtualenvwrapper/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pbr
diff --git a/pkgs/development/python-modules/vmprof/default.nix b/pkgs/development/python-modules/vmprof/default.nix
index f8be722ef90f..3962a1e02c36 100644
--- a/pkgs/development/python-modules/vmprof/default.nix
+++ b/pkgs/development/python-modules/vmprof/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , colorama
diff --git a/pkgs/development/python-modules/vncdo/default.nix b/pkgs/development/python-modules/vncdo/default.nix
index cb1b1677e1b5..ef33a46cc34c 100644
--- a/pkgs/development/python-modules/vncdo/default.nix
+++ b/pkgs/development/python-modules/vncdo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub
+{ lib, fetchFromGitHub
 , buildPythonPackage, isPy27
 , pillow
 , twisted
diff --git a/pkgs/development/python-modules/voluptuous/default.nix b/pkgs/development/python-modules/voluptuous/default.nix
index 63be8cd4bd05..9882724fbb63 100644
--- a/pkgs/development/python-modules/voluptuous/default.nix
+++ b/pkgs/development/python-modules/voluptuous/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, nose }:
+{ lib, buildPythonPackage, fetchPypi, nose }:
 
 buildPythonPackage rec {
   pname = "voluptuous";
diff --git a/pkgs/development/python-modules/vultr/default.nix b/pkgs/development/python-modules/vultr/default.nix
index d4349d310be2..975e4098112a 100644
--- a/pkgs/development/python-modules/vultr/default.nix
+++ b/pkgs/development/python-modules/vultr/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , requests
diff --git a/pkgs/development/python-modules/vxi11/default.nix b/pkgs/development/python-modules/vxi11/default.nix
index 5d9531aa904d..242fe47b33d0 100644
--- a/pkgs/development/python-modules/vxi11/default.nix
+++ b/pkgs/development/python-modules/vxi11/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, nose }:
+{ lib, buildPythonPackage, fetchFromGitHub, nose }:
 
 buildPythonPackage rec {
   pname = "python-vxi11";
diff --git a/pkgs/development/python-modules/w3lib/default.nix b/pkgs/development/python-modules/w3lib/default.nix
index ae404e01cfb9..0c80423e36a2 100644
--- a/pkgs/development/python-modules/w3lib/default.nix
+++ b/pkgs/development/python-modules/w3lib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/waitress/default.nix b/pkgs/development/python-modules/waitress/default.nix
index 09f4f66e0b52..4edd4c6ccffb 100644
--- a/pkgs/development/python-modules/waitress/default.nix
+++ b/pkgs/development/python-modules/waitress/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/wakeonlan/default.nix b/pkgs/development/python-modules/wakeonlan/default.nix
index 29c30e7ba6ad..86d405a33ef9 100644
--- a/pkgs/development/python-modules/wakeonlan/default.nix
+++ b/pkgs/development/python-modules/wakeonlan/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, setuptools_scm, pytest, mock }:
+{ lib, fetchPypi, buildPythonPackage, setuptools_scm, pytest, mock }:
 
 buildPythonPackage rec {
   pname = "wakeonlan";
diff --git a/pkgs/development/python-modules/warlock/default.nix b/pkgs/development/python-modules/warlock/default.nix
index 80dcabdcb207..1b62c918f339 100644
--- a/pkgs/development/python-modules/warlock/default.nix
+++ b/pkgs/development/python-modules/warlock/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/wasabi/default.nix b/pkgs/development/python-modules/wasabi/default.nix
index 5a0c2ecaa5f5..f9bc1916ad60 100644
--- a/pkgs/development/python-modules/wasabi/default.nix
+++ b/pkgs/development/python-modules/wasabi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytestCheckHook
diff --git a/pkgs/development/python-modules/web/default.nix b/pkgs/development/python-modules/web/default.nix
index 84b4cc8dcfbb..1b40519d592a 100644
--- a/pkgs/development/python-modules/web/default.nix
+++ b/pkgs/development/python-modules/web/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytestCheckHook
+{ lib, buildPythonPackage, fetchPypi, pytestCheckHook
 , cheroot
 , dbutils, mysqlclient, pymysql, mysql-connector, psycopg2
 }:
diff --git a/pkgs/development/python-modules/webapp2/default.nix b/pkgs/development/python-modules/webapp2/default.nix
index 048c5d91b1d2..841fb5bd74b6 100644
--- a/pkgs/development/python-modules/webapp2/default.nix
+++ b/pkgs/development/python-modules/webapp2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , webob
diff --git a/pkgs/development/python-modules/webhelpers/default.nix b/pkgs/development/python-modules/webhelpers/default.nix
index 040341ed376a..dcb2bd3817d7 100644
--- a/pkgs/development/python-modules/webhelpers/default.nix
+++ b/pkgs/development/python-modules/webhelpers/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , routes
diff --git a/pkgs/development/python-modules/webob/default.nix b/pkgs/development/python-modules/webob/default.nix
index 78ca8f918a3f..124b45a2eb39 100644
--- a/pkgs/development/python-modules/webob/default.nix
+++ b/pkgs/development/python-modules/webob/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/websockify/default.nix b/pkgs/development/python-modules/websockify/default.nix
index 021344b2207a..d3072e750419 100644
--- a/pkgs/development/python-modules/websockify/default.nix
+++ b/pkgs/development/python-modules/websockify/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , numpy
diff --git a/pkgs/development/python-modules/webtest/default.nix b/pkgs/development/python-modules/webtest/default.nix
index 98ee58d3f6c4..d56e5415b918 100644
--- a/pkgs/development/python-modules/webtest/default.nix
+++ b/pkgs/development/python-modules/webtest/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/whisper/default.nix b/pkgs/development/python-modules/whisper/default.nix
index ad25df4868a4..7b084c16267d 100644
--- a/pkgs/development/python-modules/whisper/default.nix
+++ b/pkgs/development/python-modules/whisper/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, mock, six }:
+{ lib, buildPythonPackage, fetchPypi, mock, six }:
 
 buildPythonPackage rec {
   pname = "whisper";
diff --git a/pkgs/development/python-modules/whitenoise/default.nix b/pkgs/development/python-modules/whitenoise/default.nix
index 2399c6ed73f2..3c63c727c0d7 100644
--- a/pkgs/development/python-modules/whitenoise/default.nix
+++ b/pkgs/development/python-modules/whitenoise/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, isPy27 }:
+{ lib, fetchPypi, buildPythonPackage, isPy27 }:
 
 buildPythonPackage rec {
   pname = "whitenoise";
diff --git a/pkgs/development/python-modules/whoosh/default.nix b/pkgs/development/python-modules/whoosh/default.nix
index f5bbccec2a5e..d3ff703f694a 100644
--- a/pkgs/development/python-modules/whoosh/default.nix
+++ b/pkgs/development/python-modules/whoosh/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest }:
+{ lib, buildPythonPackage, fetchPypi, pytest }:
 
 buildPythonPackage rec {
   pname = "Whoosh";
diff --git a/pkgs/development/python-modules/willow/default.nix b/pkgs/development/python-modules/willow/default.nix
index fbf4965117b3..3dafd4df44b3 100644
--- a/pkgs/development/python-modules/willow/default.nix
+++ b/pkgs/development/python-modules/willow/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
diff --git a/pkgs/development/python-modules/word2vec/default.nix b/pkgs/development/python-modules/word2vec/default.nix
index 647914bfbe5f..259566c8fc26 100644
--- a/pkgs/development/python-modules/word2vec/default.nix
+++ b/pkgs/development/python-modules/word2vec/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , fetchzip
diff --git a/pkgs/development/python-modules/wordcloud/default.nix b/pkgs/development/python-modules/wordcloud/default.nix
index b4dd108ae739..80f22efbda85 100644
--- a/pkgs/development/python-modules/wordcloud/default.nix
+++ b/pkgs/development/python-modules/wordcloud/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub
+{ lib, buildPythonPackage, fetchFromGitHub
 , matplotlib
 , mock
 , numpy
diff --git a/pkgs/development/python-modules/worldengine/default.nix b/pkgs/development/python-modules/worldengine/default.nix
index 51c0de77917d..13ce4bc873d6 100644
--- a/pkgs/development/python-modules/worldengine/default.nix
+++ b/pkgs/development/python-modules/worldengine/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , pythonOlder
 , isPy27
diff --git a/pkgs/development/python-modules/wrapio/default.nix b/pkgs/development/python-modules/wrapio/default.nix
index 757585bd1455..bbbc1917f541 100644
--- a/pkgs/development/python-modules/wrapio/default.nix
+++ b/pkgs/development/python-modules/wrapio/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/ws4py/default.nix b/pkgs/development/python-modules/ws4py/default.nix
index 2b7a66df285c..8abf78520dca 100644
--- a/pkgs/development/python-modules/ws4py/default.nix
+++ b/pkgs/development/python-modules/ws4py/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest, mock, git
+{ lib, buildPythonPackage, fetchPypi, pytest, mock, git
 , cherrypy, gevent, tornado }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/wsgiproxy/default.nix b/pkgs/development/python-modules/wsgiproxy/default.nix
index 12aa3c88d968..e2cc26ff143e 100644
--- a/pkgs/development/python-modules/wsgiproxy/default.nix
+++ b/pkgs/development/python-modules/wsgiproxy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , paste
diff --git a/pkgs/development/python-modules/wsgiproxy2/default.nix b/pkgs/development/python-modules/wsgiproxy2/default.nix
index 81a2f98b86f8..2a9856cdd086 100644
--- a/pkgs/development/python-modules/wsgiproxy2/default.nix
+++ b/pkgs/development/python-modules/wsgiproxy2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/wtforms/default.nix b/pkgs/development/python-modules/wtforms/default.nix
index 45c465ddcba7..96440c438bcb 100644
--- a/pkgs/development/python-modules/wtforms/default.nix
+++ b/pkgs/development/python-modules/wtforms/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , markupsafe
diff --git a/pkgs/development/python-modules/x11_hash/default.nix b/pkgs/development/python-modules/x11_hash/default.nix
index 21bb787402c1..e9cfe3174327 100644
--- a/pkgs/development/python-modules/x11_hash/default.nix
+++ b/pkgs/development/python-modules/x11_hash/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/x256/default.nix b/pkgs/development/python-modules/x256/default.nix
index 4ceb2dcae791..4430fa2e4b8a 100644
--- a/pkgs/development/python-modules/x256/default.nix
+++ b/pkgs/development/python-modules/x256/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/xapp/default.nix b/pkgs/development/python-modules/xapp/default.nix
index 28901017b2b5..44435dd6bd8b 100644
--- a/pkgs/development/python-modules/xapp/default.nix
+++ b/pkgs/development/python-modules/xapp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , buildPythonPackage
 , psutil
diff --git a/pkgs/development/python-modules/xattr/default.nix b/pkgs/development/python-modules/xattr/default.nix
index 3583358a5605..a39c3532f4b8 100644
--- a/pkgs/development/python-modules/xattr/default.nix
+++ b/pkgs/development/python-modules/xattr/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , python
diff --git a/pkgs/development/python-modules/xcaplib/default.nix b/pkgs/development/python-modules/xcaplib/default.nix
index f6bb5712c2eb..086eaf1e3488 100644
--- a/pkgs/development/python-modules/xcaplib/default.nix
+++ b/pkgs/development/python-modules/xcaplib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchdarcs
 , isPy3k
diff --git a/pkgs/development/python-modules/xdot/default.nix b/pkgs/development/python-modules/xdot/default.nix
index 21b45b9c322d..7dbbd89e781b 100644
--- a/pkgs/development/python-modules/xdot/default.nix
+++ b/pkgs/development/python-modules/xdot/default.nix
@@ -1,4 +1,4 @@
-{ lib, buildPythonPackage, fetchPypi, isPy3k, python3, xvfb_run, stdenv
+{ lib, buildPythonPackage, fetchPypi, isPy3k, python3, xvfb_run
 , wrapGAppsHook, gobject-introspection, pygobject3, graphviz, gtk3, numpy }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/xhtml2pdf/default.nix b/pkgs/development/python-modules/xhtml2pdf/default.nix
index e3328c7e4534..efdb40cd6f87 100644
--- a/pkgs/development/python-modules/xhtml2pdf/default.nix
+++ b/pkgs/development/python-modules/xhtml2pdf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pillow
diff --git a/pkgs/development/python-modules/xkcdpass/default.nix b/pkgs/development/python-modules/xkcdpass/default.nix
index 88f7b9b94a1f..280ce5a790a6 100644
--- a/pkgs/development/python-modules/xkcdpass/default.nix
+++ b/pkgs/development/python-modules/xkcdpass/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/xlrd/default.nix b/pkgs/development/python-modules/xlrd/default.nix
index 031ac047936e..d880fd833965 100644
--- a/pkgs/development/python-modules/xlrd/default.nix
+++ b/pkgs/development/python-modules/xlrd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/xlsx2csv/default.nix b/pkgs/development/python-modules/xlsx2csv/default.nix
index a5b67632d836..6f7726da68d7 100644
--- a/pkgs/development/python-modules/xlsx2csv/default.nix
+++ b/pkgs/development/python-modules/xlsx2csv/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/xml2rfc/default.nix b/pkgs/development/python-modules/xml2rfc/default.nix
index e06daf3c5b86..fdf042c2ac29 100644
--- a/pkgs/development/python-modules/xml2rfc/default.nix
+++ b/pkgs/development/python-modules/xml2rfc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, pythonAtLeast, intervaltree, pyflakes, requests, lxml, google-i18n-address
+{ lib, fetchPypi, buildPythonPackage, pythonAtLeast, intervaltree, pyflakes, requests, lxml, google-i18n-address
 , pycountry, html5lib, six, kitchen, pypdf2, dict2xml, weasyprint, pyyaml, jinja2, ConfigArgParse, appdirs
 }:
 
diff --git a/pkgs/development/python-modules/xmodem/default.nix b/pkgs/development/python-modules/xmodem/default.nix
index 9023c4cc79ee..a53567f7fa8b 100644
--- a/pkgs/development/python-modules/xmodem/default.nix
+++ b/pkgs/development/python-modules/xmodem/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, pytest, which, lrzsz }:
+{ lib, buildPythonPackage, fetchFromGitHub, pytest, which, lrzsz }:
 
 buildPythonPackage rec {
   pname = "xmodem";
diff --git a/pkgs/development/python-modules/xmpppy/default.nix b/pkgs/development/python-modules/xmpppy/default.nix
index fd046adadd97..65e2b3711fa0 100644
--- a/pkgs/development/python-modules/xmpppy/default.nix
+++ b/pkgs/development/python-modules/xmpppy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchurl, isPy3k }:
+{ lib, buildPythonPackage, fetchurl, isPy3k }:
 buildPythonPackage rec {
   pname = "xmpp.py";
   version = "0.5.0rc1";
diff --git a/pkgs/development/python-modules/xvfbwrapper/default.nix b/pkgs/development/python-modules/xvfbwrapper/default.nix
index 0852fd2e15cf..f037cb40338c 100644
--- a/pkgs/development/python-modules/xvfbwrapper/default.nix
+++ b/pkgs/development/python-modules/xvfbwrapper/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , xorgserver
diff --git a/pkgs/development/python-modules/xxhash/default.nix b/pkgs/development/python-modules/xxhash/default.nix
index d2f6ae54a4cf..08bcfcdacdee 100644
--- a/pkgs/development/python-modules/xxhash/default.nix
+++ b/pkgs/development/python-modules/xxhash/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/yamllint/default.nix b/pkgs/development/python-modules/yamllint/default.nix
index 7145c504cd92..13545c0430d1 100644
--- a/pkgs/development/python-modules/yamllint/default.nix
+++ b/pkgs/development/python-modules/yamllint/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , nose, pyyaml, pathspec }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/yanc/default.nix b/pkgs/development/python-modules/yanc/default.nix
index 6d4a3b41fbcc..925276c0ad62 100644
--- a/pkgs/development/python-modules/yanc/default.nix
+++ b/pkgs/development/python-modules/yanc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, pythonOlder, fetchPypi, nose }:
+{ lib, buildPythonPackage, pythonOlder, fetchPypi, nose }:
 
 buildPythonPackage rec {
   pname = "yanc";
diff --git a/pkgs/development/python-modules/yapf/default.nix b/pkgs/development/python-modules/yapf/default.nix
index 36409ae40195..9c0e9d353993 100644
--- a/pkgs/development/python-modules/yapf/default.nix
+++ b/pkgs/development/python-modules/yapf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "yapf";
diff --git a/pkgs/development/python-modules/yapsy/default.nix b/pkgs/development/python-modules/yapsy/default.nix
index 359a855a3e5f..e60b0a114731 100644
--- a/pkgs/development/python-modules/yapsy/default.nix
+++ b/pkgs/development/python-modules/yapsy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/yarl/default.nix b/pkgs/development/python-modules/yarl/default.nix
index 7a88b695f639..0aeb85e6ca2d 100644
--- a/pkgs/development/python-modules/yarl/default.nix
+++ b/pkgs/development/python-modules/yarl/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , fetchPypi
 , buildPythonPackage
 , pythonOlder
diff --git a/pkgs/development/python-modules/ydiff/default.nix b/pkgs/development/python-modules/ydiff/default.nix
index be935b1995c6..e7452b89a539 100644
--- a/pkgs/development/python-modules/ydiff/default.nix
+++ b/pkgs/development/python-modules/ydiff/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonPackage, fetchPypi, docutils, pygments
+{ lib, buildPythonPackage, fetchPypi, docutils, pygments
 , gitMinimal, mercurial, subversion, patchutils, less
 }:
 
diff --git a/pkgs/development/python-modules/yowsup/default.nix b/pkgs/development/python-modules/yowsup/default.nix
index 48c21434194f..0ff3212f48ca 100644
--- a/pkgs/development/python-modules/yowsup/default.nix
+++ b/pkgs/development/python-modules/yowsup/default.nix
@@ -1,4 +1,4 @@
-{ buildPythonPackage, lib, stdenv, fetchFromGitHub, six, python-axolotl, pytest
+{ buildPythonPackage, lib, fetchFromGitHub, six, python-axolotl, pytest
 , isPy3k, consonance, appdirs
 }:
 
diff --git a/pkgs/development/python-modules/z3c-checkversions/default.nix b/pkgs/development/python-modules/z3c-checkversions/default.nix
index f1af120d56eb..8610306ea6f2 100644
--- a/pkgs/development/python-modules/z3c-checkversions/default.nix
+++ b/pkgs/development/python-modules/z3c-checkversions/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , python
diff --git a/pkgs/development/python-modules/zake/default.nix b/pkgs/development/python-modules/zake/default.nix
index 1d1d21a462ec..89635a88f35e 100644
--- a/pkgs/development/python-modules/zake/default.nix
+++ b/pkgs/development/python-modules/zake/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , kazoo
diff --git a/pkgs/development/python-modules/zbaemon/default.nix b/pkgs/development/python-modules/zbaemon/default.nix
index 4e126074b184..23eae31057fc 100644
--- a/pkgs/development/python-modules/zbaemon/default.nix
+++ b/pkgs/development/python-modules/zbaemon/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , zconfig
diff --git a/pkgs/development/python-modules/zbase32/default.nix b/pkgs/development/python-modules/zbase32/default.nix
index a4e7a476beca..715da719bbbc 100644
--- a/pkgs/development/python-modules/zbase32/default.nix
+++ b/pkgs/development/python-modules/zbase32/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , setuptoolsDarcs
diff --git a/pkgs/development/python-modules/zc_lockfile/default.nix b/pkgs/development/python-modules/zc_lockfile/default.nix
index 3b75de3a24b6..97289ec36300 100644
--- a/pkgs/development/python-modules/zc_lockfile/default.nix
+++ b/pkgs/development/python-modules/zc_lockfile/default.nix
@@ -2,7 +2,7 @@
 , fetchPypi
 , mock
 , zope_testing
-, lib, stdenv
+, lib
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/zdaemon/default.nix b/pkgs/development/python-modules/zdaemon/default.nix
index 4e126074b184..23eae31057fc 100644
--- a/pkgs/development/python-modules/zdaemon/default.nix
+++ b/pkgs/development/python-modules/zdaemon/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , zconfig
diff --git a/pkgs/development/python-modules/zerobin/default.nix b/pkgs/development/python-modules/zerobin/default.nix
index e12088756686..19d02a70496b 100644
--- a/pkgs/development/python-modules/zerobin/default.nix
+++ b/pkgs/development/python-modules/zerobin/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , cherrypy
diff --git a/pkgs/development/python-modules/zeroc-ice/default.nix b/pkgs/development/python-modules/zeroc-ice/default.nix
index f85674d68673..6dccf51100e2 100644
--- a/pkgs/development/python-modules/zeroc-ice/default.nix
+++ b/pkgs/development/python-modules/zeroc-ice/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, openssl, bzip2 }:
+{ lib, buildPythonPackage, fetchPypi, openssl, bzip2 }:
 
 buildPythonPackage rec {
   pname = "zeroc-ice";
diff --git a/pkgs/development/python-modules/zfec/default.nix b/pkgs/development/python-modules/zfec/default.nix
index 8a5aaf46b0e4..bcec7a092511 100644
--- a/pkgs/development/python-modules/zfec/default.nix
+++ b/pkgs/development/python-modules/zfec/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , setuptoolsDarcs
diff --git a/pkgs/development/python-modules/zict/default.nix b/pkgs/development/python-modules/zict/default.nix
index da36c1cba899..611660fc3eb5 100644
--- a/pkgs/development/python-modules/zict/default.nix
+++ b/pkgs/development/python-modules/zict/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , pytest, heapdict, pythonOlder }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/zigpy-znp/default.nix b/pkgs/development/python-modules/zigpy-znp/default.nix
index 4de49cbc46b3..1a1c639a4738 100644
--- a/pkgs/development/python-modules/zigpy-znp/default.nix
+++ b/pkgs/development/python-modules/zigpy-znp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , async-timeout
 , asynctest
 , buildPythonPackage
diff --git a/pkgs/development/python-modules/zodb/default.nix b/pkgs/development/python-modules/zodb/default.nix
index d48b9c4b9507..aa7cc6c97ebd 100644
--- a/pkgs/development/python-modules/zodb/default.nix
+++ b/pkgs/development/python-modules/zodb/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchPypi
 , buildPythonPackage
 , python
diff --git a/pkgs/development/python-modules/zope_broken/default.nix b/pkgs/development/python-modules/zope_broken/default.nix
index 899d7f3344be..a3583654e660 100644
--- a/pkgs/development/python-modules/zope_broken/default.nix
+++ b/pkgs/development/python-modules/zope_broken/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , zope_interface
diff --git a/pkgs/development/python-modules/zope_component/default.nix b/pkgs/development/python-modules/zope_component/default.nix
index 6ea86b9b984d..65556c9dc417 100644
--- a/pkgs/development/python-modules/zope_component/default.nix
+++ b/pkgs/development/python-modules/zope_component/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , zope-deferredimport
diff --git a/pkgs/development/python-modules/zope_configuration/default.nix b/pkgs/development/python-modules/zope_configuration/default.nix
index e8d05b7767b3..e3ede9f94aff 100644
--- a/pkgs/development/python-modules/zope_configuration/default.nix
+++ b/pkgs/development/python-modules/zope_configuration/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , zope_i18nmessageid
diff --git a/pkgs/development/python-modules/zope_contenttype/default.nix b/pkgs/development/python-modules/zope_contenttype/default.nix
index 6b66cca18aab..15010d80a145 100644
--- a/pkgs/development/python-modules/zope_contenttype/default.nix
+++ b/pkgs/development/python-modules/zope_contenttype/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , zope_testrunner
diff --git a/pkgs/development/python-modules/zope_deprecation/default.nix b/pkgs/development/python-modules/zope_deprecation/default.nix
index cda7af8e7a0c..7eb66f7a9c57 100644
--- a/pkgs/development/python-modules/zope_deprecation/default.nix
+++ b/pkgs/development/python-modules/zope_deprecation/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , zope_testing
diff --git a/pkgs/development/python-modules/zope_dottedname/default.nix b/pkgs/development/python-modules/zope_dottedname/default.nix
index 0e8f35431364..cbd5cd6d6539 100644
--- a/pkgs/development/python-modules/zope_dottedname/default.nix
+++ b/pkgs/development/python-modules/zope_dottedname/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/zope_event/default.nix b/pkgs/development/python-modules/zope_event/default.nix
index cc82da7ea9a1..2ebf6e017b5f 100644
--- a/pkgs/development/python-modules/zope_event/default.nix
+++ b/pkgs/development/python-modules/zope_event/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/zope_exceptions/default.nix b/pkgs/development/python-modules/zope_exceptions/default.nix
index 09f08c7bba48..0586227c61c5 100644
--- a/pkgs/development/python-modules/zope_exceptions/default.nix
+++ b/pkgs/development/python-modules/zope_exceptions/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , zope_interface
diff --git a/pkgs/development/python-modules/zope_filerepresentation/default.nix b/pkgs/development/python-modules/zope_filerepresentation/default.nix
index 7aae2a24d623..4792a09e26b2 100644
--- a/pkgs/development/python-modules/zope_filerepresentation/default.nix
+++ b/pkgs/development/python-modules/zope_filerepresentation/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , zope_schema
diff --git a/pkgs/development/python-modules/zope_i18nmessageid/default.nix b/pkgs/development/python-modules/zope_i18nmessageid/default.nix
index 49270488ecdb..1155adc83e9e 100644
--- a/pkgs/development/python-modules/zope_i18nmessageid/default.nix
+++ b/pkgs/development/python-modules/zope_i18nmessageid/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/zope_interface/default.nix b/pkgs/development/python-modules/zope_interface/default.nix
index 7a32045fc3e3..7b5d7abf682f 100644
--- a/pkgs/development/python-modules/zope_interface/default.nix
+++ b/pkgs/development/python-modules/zope_interface/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , zope_event
diff --git a/pkgs/development/python-modules/zope_lifecycleevent/default.nix b/pkgs/development/python-modules/zope_lifecycleevent/default.nix
index 390624b50de7..809d8252cb2e 100644
--- a/pkgs/development/python-modules/zope_lifecycleevent/default.nix
+++ b/pkgs/development/python-modules/zope_lifecycleevent/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/zope_location/default.nix b/pkgs/development/python-modules/zope_location/default.nix
index 62b2cef9ea75..69fee2e338ff 100644
--- a/pkgs/development/python-modules/zope_location/default.nix
+++ b/pkgs/development/python-modules/zope_location/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , zope_proxy
diff --git a/pkgs/development/python-modules/zope_proxy/default.nix b/pkgs/development/python-modules/zope_proxy/default.nix
index af108c058c7f..67e8a191d97a 100644
--- a/pkgs/development/python-modules/zope_proxy/default.nix
+++ b/pkgs/development/python-modules/zope_proxy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , zope_interface
diff --git a/pkgs/development/python-modules/zope_schema/default.nix b/pkgs/development/python-modules/zope_schema/default.nix
index c7e228c4e05b..75683cb2eb8f 100644
--- a/pkgs/development/python-modules/zope_schema/default.nix
+++ b/pkgs/development/python-modules/zope_schema/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , zope_location
diff --git a/pkgs/development/python-modules/zope_size/default.nix b/pkgs/development/python-modules/zope_size/default.nix
index 79eadc880a25..6945dddceaa3 100644
--- a/pkgs/development/python-modules/zope_size/default.nix
+++ b/pkgs/development/python-modules/zope_size/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , zope_i18nmessageid
diff --git a/pkgs/development/python-modules/zope_testing/default.nix b/pkgs/development/python-modules/zope_testing/default.nix
index 3d7cbf90c25f..2f37f15453da 100644
--- a/pkgs/development/python-modules/zope_testing/default.nix
+++ b/pkgs/development/python-modules/zope_testing/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPyPy
diff --git a/pkgs/development/python-modules/zope_testrunner/default.nix b/pkgs/development/python-modules/zope_testrunner/default.nix
index c516106e48bb..5ee42c842753 100644
--- a/pkgs/development/python-modules/zope_testrunner/default.nix
+++ b/pkgs/development/python-modules/zope_testrunner/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , zope_interface
diff --git a/pkgs/development/python-modules/zstd/default.nix b/pkgs/development/python-modules/zstd/default.nix
index af7bb7692f66..1d8fa8d93e9c 100644
--- a/pkgs/development/python-modules/zstd/default.nix
+++ b/pkgs/development/python-modules/zstd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, pkg-config, fetchPypi, buildPythonPackage
+{ lib, pkg-config, fetchPypi, buildPythonPackage
 , buildPackages
 , zstd, pytest }:
 
diff --git a/pkgs/development/ruby-modules/bundler-app/default.nix b/pkgs/development/ruby-modules/bundler-app/default.nix
index 0859f08c2f7d..03bf7275cc71 100644
--- a/pkgs/development/ruby-modules/bundler-app/default.nix
+++ b/pkgs/development/ruby-modules/bundler-app/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, callPackage, runCommand, makeWrapper, ruby }@defs:
+{ lib, callPackage, runCommand, makeWrapper, ruby }@defs:
 
 # Use for simple installation of Ruby tools shipped in a Gem.
 # Start with a Gemfile that includes `gem <toolgem>`
diff --git a/pkgs/development/ruby-modules/testing/driver.nix b/pkgs/development/ruby-modules/testing/driver.nix
index 65e7c8d4416d..23a9a1cec543 100644
--- a/pkgs/development/ruby-modules/testing/driver.nix
+++ b/pkgs/development/ruby-modules/testing/driver.nix
@@ -5,7 +5,7 @@ nix-build -E 'with import <nixpkgs> { }; callPackage ./test.nix {}' --show-trace
 Confusingly, the ideal result ends with something like:
 error: build of ‘/nix/store/3245f3dcl2wxjs4rci7n069zjlz8qg85-test-results.tap.drv’ failed
 */
-{ writeText, lib, callPackage, testFiles, stdenv, ruby }@defs:
+{ writeText, lib, callPackage, testFiles, ruby }@defs:
 let
   testTools = rec {
     test = import ./testing.nix;
diff --git a/pkgs/development/tools/ameba/default.nix b/pkgs/development/tools/ameba/default.nix
index f8cb74411161..9bfaab51554d 100644
--- a/pkgs/development/tools/ameba/default.nix
+++ b/pkgs/development/tools/ameba/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, crystal }:
+{ lib, fetchFromGitHub, crystal }:
 
 crystal.buildCrystalPackage rec {
   pname = "ameba";
diff --git a/pkgs/development/tools/analysis/autoflake/default.nix b/pkgs/development/tools/analysis/autoflake/default.nix
index 884b511b8af1..03e01aadb716 100644
--- a/pkgs/development/tools/analysis/autoflake/default.nix
+++ b/pkgs/development/tools/analysis/autoflake/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages }:
+{ lib, python3Packages }:
 
 with python3Packages;
 buildPythonApplication rec {
diff --git a/pkgs/development/tools/analysis/bingrep/default.nix b/pkgs/development/tools/analysis/bingrep/default.nix
index ae54723dda3b..338bc3e189c1 100644
--- a/pkgs/development/tools/analysis/bingrep/default.nix
+++ b/pkgs/development/tools/analysis/bingrep/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, rustPlatform, fetchFromGitHub }:
+{ lib, rustPlatform, fetchFromGitHub }:
 
 rustPlatform.buildRustPackage rec {
   pname = "bingrep";
diff --git a/pkgs/development/tools/analysis/checkov/default.nix b/pkgs/development/tools/analysis/checkov/default.nix
index 6277b1d4239e..06c366529df3 100644
--- a/pkgs/development/tools/analysis/checkov/default.nix
+++ b/pkgs/development/tools/analysis/checkov/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, pkgs, lib, python3, fetchFromGitHub }:
+{ pkgs, lib, python3, fetchFromGitHub }:
 
 let
   pname = "checkov";
diff --git a/pkgs/development/tools/analysis/egypt/default.nix b/pkgs/development/tools/analysis/egypt/default.nix
index cfb974c86ddd..026650220991 100644
--- a/pkgs/development/tools/analysis/egypt/default.nix
+++ b/pkgs/development/tools/analysis/egypt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, perlPackages }:
+{ lib, fetchurl, perlPackages }:
 
 perlPackages.buildPerlPackage rec {
   pname = "egypt";
diff --git a/pkgs/development/tools/analysis/evmdis/default.nix b/pkgs/development/tools/analysis/evmdis/default.nix
index b8f3aa0ac1fb..4061090b1828 100644
--- a/pkgs/development/tools/analysis/evmdis/default.nix
+++ b/pkgs/development/tools/analysis/evmdis/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage {
   pname = "evmdis-unstable";
diff --git a/pkgs/development/tools/analysis/hotspot/default.nix b/pkgs/development/tools/analysis/hotspot/default.nix
index 6ea079e3ec15..94b440f58c8d 100644
--- a/pkgs/development/tools/analysis/hotspot/default.nix
+++ b/pkgs/development/tools/analysis/hotspot/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv,
+{ lib,
   mkDerivation,
   cmake,
   elfutils,
diff --git a/pkgs/development/tools/analysis/panopticon/default.nix b/pkgs/development/tools/analysis/panopticon/default.nix
index ff5014bd46a9..0ef33270e92b 100644
--- a/pkgs/development/tools/analysis/panopticon/default.nix
+++ b/pkgs/development/tools/analysis/panopticon/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform, qt5, git, cmake
+{ lib, fetchFromGitHub, rustPlatform, qt5, git, cmake
 , pkg-config, makeWrapper }:
 
 rustPlatform.buildRustPackage rec {
diff --git a/pkgs/development/tools/analysis/snowman/default.nix b/pkgs/development/tools/analysis/snowman/default.nix
index 261645c062d3..870f084580b8 100644
--- a/pkgs/development/tools/analysis/snowman/default.nix
+++ b/pkgs/development/tools/analysis/snowman/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, cmake, boost, qtbase }:
+{ lib, mkDerivation, fetchFromGitHub, cmake, boost, qtbase }:
 
 mkDerivation rec {
   pname = "snowman";
diff --git a/pkgs/development/tools/analysis/uefi-firmware-parser/default.nix b/pkgs/development/tools/analysis/uefi-firmware-parser/default.nix
index 17f390714620..b879a6ef2374 100644
--- a/pkgs/development/tools/analysis/uefi-firmware-parser/default.nix
+++ b/pkgs/development/tools/analysis/uefi-firmware-parser/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3, fetchFromGitHub }:
+{ lib, python3, fetchFromGitHub }:
 
 with python3.pkgs;
 
diff --git a/pkgs/development/tools/asn2quickder/default.nix b/pkgs/development/tools/asn2quickder/default.nix
index b2432f7fefc6..9ffcbb172d48 100644
--- a/pkgs/development/tools/asn2quickder/default.nix
+++ b/pkgs/development/tools/asn2quickder/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonApplication, fetchFromGitHub, makeWrapper, cmake
+{ lib, buildPythonApplication, fetchFromGitHub, makeWrapper, cmake
 , pytestrunner, pytest, six, pyparsing, asn1ate }:
 
 buildPythonApplication rec {
diff --git a/pkgs/development/tools/async/default.nix b/pkgs/development/tools/async/default.nix
index 54e16cb6faaf..a45e93ab151e 100644
--- a/pkgs/development/tools/async/default.nix
+++ b/pkgs/development/tools/async/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage rec {
   pname = "async";
diff --git a/pkgs/development/tools/azcopy/default.nix b/pkgs/development/tools/azcopy/default.nix
index 822480b1d3f3..98a6bcd5bbcc 100644
--- a/pkgs/development/tools/azcopy/default.nix
+++ b/pkgs/development/tools/azcopy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoModule }:
+{ lib, fetchFromGitHub, buildGoModule }:
 
 buildGoModule rec {
   pname = "azure-storage-azcopy";
diff --git a/pkgs/development/tools/bazelisk/default.nix b/pkgs/development/tools/bazelisk/default.nix
index e4a6b3c2869e..2cfde85f2248 100644
--- a/pkgs/development/tools/bazelisk/default.nix
+++ b/pkgs/development/tools/bazelisk/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "bazelisk";
diff --git a/pkgs/development/tools/build-managers/bazel/bazel-remote/default.nix b/pkgs/development/tools/build-managers/bazel/bazel-remote/default.nix
index ac03288f1485..80c949c1efbc 100644
--- a/pkgs/development/tools/build-managers/bazel/bazel-remote/default.nix
+++ b/pkgs/development/tools/build-managers/bazel/bazel-remote/default.nix
@@ -3,7 +3,7 @@
 , fetchFromGitHub
 , git
 , go
-, lib, stdenv
+, lib
 }:
 
 buildBazelPackage rec {
diff --git a/pkgs/development/tools/build-managers/bazel/buildtools/default.nix b/pkgs/development/tools/build-managers/bazel/buildtools/default.nix
index 436b681e0054..441254ce263c 100644
--- a/pkgs/development/tools/build-managers/bazel/buildtools/default.nix
+++ b/pkgs/development/tools/build-managers/bazel/buildtools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "bazel-buildtools";
diff --git a/pkgs/development/tools/build-managers/fac/default.nix b/pkgs/development/tools/build-managers/fac/default.nix
index 25450ceb6d9b..601f7ea9fea0 100644
--- a/pkgs/development/tools/build-managers/fac/default.nix
+++ b/pkgs/development/tools/build-managers/fac/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, git, fetchFromGitHub, rustPlatform }:
+{ lib, git, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage rec {
   pname = "fac-build";
diff --git a/pkgs/development/tools/build-managers/meson/default.nix b/pkgs/development/tools/build-managers/meson/default.nix
index 74d96d4af002..7009aa4898fa 100644
--- a/pkgs/development/tools/build-managers/meson/default.nix
+++ b/pkgs/development/tools/build-managers/meson/default.nix
@@ -1,6 +1,6 @@
 { lib
 , python3
-, stdenv
+
 , writeTextDir
 , substituteAll
 , fetchpatch
diff --git a/pkgs/development/tools/build-managers/pants/default.nix b/pkgs/development/tools/build-managers/pants/default.nix
index 03eac2db5e38..53333c217ba5 100644
--- a/pkgs/development/tools/build-managers/pants/default.nix
+++ b/pkgs/development/tools/build-managers/pants/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, pythonPackages }:
+{ lib, pythonPackages }:
 
 with lib;
 with pythonPackages;
diff --git a/pkgs/development/tools/build-managers/scons/common.nix b/pkgs/development/tools/build-managers/scons/common.nix
index 1de2ecbbc8b8..63df4ccf7be7 100644
--- a/pkgs/development/tools/build-managers/scons/common.nix
+++ b/pkgs/development/tools/build-managers/scons/common.nix
@@ -1,6 +1,6 @@
 { version, sha256 }:
 
-{ stdenv, fetchurl, python3Packages, lib }:
+{ fetchurl, python3Packages, lib }:
 
 python3Packages.buildPythonApplication rec {
   pname = "scons";
diff --git a/pkgs/development/tools/build-managers/shards/default.nix b/pkgs/development/tools/build-managers/shards/default.nix
index 868ea265f6f4..8cab1667b218 100644
--- a/pkgs/development/tools/build-managers/shards/default.nix
+++ b/pkgs/development/tools/build-managers/shards/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , crystal_0_34
 , crystal_0_35
diff --git a/pkgs/development/tools/clog-cli/default.nix b/pkgs/development/tools/clog-cli/default.nix
index 182a7f98c4c2..c3b477e3ea36 100644
--- a/pkgs/development/tools/clog-cli/default.nix
+++ b/pkgs/development/tools/clog-cli/default.nix
@@ -1,4 +1,4 @@
-{ fetchFromGitHub, rustPlatform, lib, stdenv }:
+{ fetchFromGitHub, rustPlatform, lib }:
 
 with rustPlatform;
 
diff --git a/pkgs/development/tools/compile-daemon/default.nix b/pkgs/development/tools/compile-daemon/default.nix
index ef08b2d58134..a12fb4424e8e 100644
--- a/pkgs/development/tools/compile-daemon/default.nix
+++ b/pkgs/development/tools/compile-daemon/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "compile-daemon-unstable";
diff --git a/pkgs/development/tools/continuous-integration/buildkite-agent/default.nix b/pkgs/development/tools/continuous-integration/buildkite-agent/default.nix
index bd8608a91197..ed1171458b10 100644
--- a/pkgs/development/tools/continuous-integration/buildkite-agent/default.nix
+++ b/pkgs/development/tools/continuous-integration/buildkite-agent/default.nix
@@ -1,4 +1,4 @@
-{ fetchFromGitHub, lib, stdenv, buildGoModule,
+{ fetchFromGitHub, lib, buildGoModule,
   makeWrapper, coreutils, git, openssh, bash, gnused, gnugrep }:
 buildGoModule rec {
   name = "buildkite-agent-${version}";
diff --git a/pkgs/development/tools/continuous-integration/buildkite-agent/generic.nix b/pkgs/development/tools/continuous-integration/buildkite-agent/generic.nix
index 232efe32a1a8..64ca730d7dc0 100644
--- a/pkgs/development/tools/continuous-integration/buildkite-agent/generic.nix
+++ b/pkgs/development/tools/continuous-integration/buildkite-agent/generic.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildGoPackage, makeWrapper, coreutils, git, openssh, bash, gnused, gnugrep
+{ buildGoPackage, makeWrapper, coreutils, git, openssh, bash, gnused, gnugrep
 , src, version, hasBootstrapScript, postPatch ? ""
 , ... }:
 let
diff --git a/pkgs/development/tools/continuous-integration/drone-cli/default.nix b/pkgs/development/tools/continuous-integration/drone-cli/default.nix
index b1ee5349a5c1..6c9cffe41b20 100644
--- a/pkgs/development/tools/continuous-integration/drone-cli/default.nix
+++ b/pkgs/development/tools/continuous-integration/drone-cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoModule }:
+{ lib, fetchFromGitHub, buildGoModule }:
 
 let version = "1.2.4";
 in buildGoModule rec {
diff --git a/pkgs/development/tools/continuous-integration/drone/default.nix b/pkgs/development/tools/continuous-integration/drone/default.nix
index ffdf588895aa..c6d609e38cf1 100644
--- a/pkgs/development/tools/continuous-integration/drone/default.nix
+++ b/pkgs/development/tools/continuous-integration/drone/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoModule }:
+{ lib, fetchFromGitHub, buildGoModule }:
 
 buildGoModule rec {
   name = "drone.io-${version}";
diff --git a/pkgs/development/tools/corgi/default.nix b/pkgs/development/tools/corgi/default.nix
index a7698ef4fb8e..e39e42c40af5 100644
--- a/pkgs/development/tools/corgi/default.nix
+++ b/pkgs/development/tools/corgi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "corgi-${rev}";
diff --git a/pkgs/development/tools/cppclean/default.nix b/pkgs/development/tools/cppclean/default.nix
index 4e00eb903ebe..460d7cddb83d 100644
--- a/pkgs/development/tools/cppclean/default.nix
+++ b/pkgs/development/tools/cppclean/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 with python3Packages;
 
diff --git a/pkgs/development/tools/cue/default.nix b/pkgs/development/tools/cue/default.nix
index 243be958b07d..28660732ea4f 100644
--- a/pkgs/development/tools/cue/default.nix
+++ b/pkgs/development/tools/cue/default.nix
@@ -1,4 +1,4 @@
-{ buildGoModule, fetchgit, lib, stdenv }:
+{ buildGoModule, fetchgit, lib }:
 
 buildGoModule rec {
   pname = "cue";
diff --git a/pkgs/development/tools/dapr/cli/default.nix b/pkgs/development/tools/dapr/cli/default.nix
index 7a8243ece25d..57fd984dc17c 100644
--- a/pkgs/development/tools/dapr/cli/default.nix
+++ b/pkgs/development/tools/dapr/cli/default.nix
@@ -1,4 +1,4 @@
-{ buildGoModule, fetchFromGitHub, lib, stdenv }:
+{ buildGoModule, fetchFromGitHub, lib }:
 
 let
   pname = "dapr";
diff --git a/pkgs/development/tools/database/dbmate/default.nix b/pkgs/development/tools/database/dbmate/default.nix
index 9c01c1e9d2d1..6634c2b6384d 100644
--- a/pkgs/development/tools/database/dbmate/default.nix
+++ b/pkgs/development/tools/database/dbmate/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "dbmate";
diff --git a/pkgs/development/tools/database/pyrseas/default.nix b/pkgs/development/tools/database/pyrseas/default.nix
index 119aa2eb8f81..075cd5053beb 100644
--- a/pkgs/development/tools/database/pyrseas/default.nix
+++ b/pkgs/development/tools/database/pyrseas/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, pythonPackages, fetchFromGitHub }:
+{ lib, pythonPackages, fetchFromGitHub }:
 
 let
   pgdbconn = pythonPackages.buildPythonPackage {
diff --git a/pkgs/development/tools/database/timescaledb-parallel-copy/default.nix b/pkgs/development/tools/database/timescaledb-parallel-copy/default.nix
index 2b8a6f7cca02..42c2a55fd3eb 100644
--- a/pkgs/development/tools/database/timescaledb-parallel-copy/default.nix
+++ b/pkgs/development/tools/database/timescaledb-parallel-copy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "timescaledb-parallel-copy";
diff --git a/pkgs/development/tools/database/timescaledb-tune/default.nix b/pkgs/development/tools/database/timescaledb-tune/default.nix
index cec374ccb3a9..34d5d12607f7 100644
--- a/pkgs/development/tools/database/timescaledb-tune/default.nix
+++ b/pkgs/development/tools/database/timescaledb-tune/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "timescaledb-tune";
diff --git a/pkgs/development/tools/deis/default.nix b/pkgs/development/tools/deis/default.nix
index c8e20d42063f..8286435d9a3a 100644
--- a/pkgs/development/tools/deis/default.nix
+++ b/pkgs/development/tools/deis/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "deis";
diff --git a/pkgs/development/tools/deisctl/default.nix b/pkgs/development/tools/deisctl/default.nix
index 0f5df40d92c7..67245a5ebbe7 100644
--- a/pkgs/development/tools/deisctl/default.nix
+++ b/pkgs/development/tools/deisctl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "deis";
diff --git a/pkgs/development/tools/delve/default.nix b/pkgs/development/tools/delve/default.nix
index 62fb32c85163..bd8f2484b33d 100644
--- a/pkgs/development/tools/delve/default.nix
+++ b/pkgs/development/tools/delve/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "delve";
diff --git a/pkgs/development/tools/dep/default.nix b/pkgs/development/tools/dep/default.nix
index ff7f370b0d44..ff7bad87afd6 100644
--- a/pkgs/development/tools/dep/default.nix
+++ b/pkgs/development/tools/dep/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "dep";
diff --git a/pkgs/development/tools/dep2nix/default.nix b/pkgs/development/tools/dep2nix/default.nix
index daa68b1b9311..5d98ecd57296 100644
--- a/pkgs/development/tools/dep2nix/default.nix
+++ b/pkgs/development/tools/dep2nix/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoPackage
+{ lib, fetchFromGitHub, buildGoPackage
 , makeWrapper, nix-prefetch-scripts }:
 
 buildGoPackage rec {
diff --git a/pkgs/development/tools/devd/default.nix b/pkgs/development/tools/devd/default.nix
index 32f29f7e128c..0789850a4945 100644
--- a/pkgs/development/tools/devd/default.nix
+++ b/pkgs/development/tools/devd/default.nix
@@ -1,4 +1,4 @@
-{ buildGoPackage, fetchFromGitHub, lib, stdenv }:
+{ buildGoPackage, fetchFromGitHub, lib }:
 
 buildGoPackage rec {
   pname = "devd";
diff --git a/pkgs/development/tools/devpi-client/default.nix b/pkgs/development/tools/devpi-client/default.nix
index 766f3f2b7292..5905e05d0710 100644
--- a/pkgs/development/tools/devpi-client/default.nix
+++ b/pkgs/development/tools/devpi-client/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonApplication
 , fetchPypi
 # buildInputs
diff --git a/pkgs/development/tools/devpi-server/default.nix b/pkgs/development/tools/devpi-server/default.nix
index 3d8cb16bb478..8a484a23349c 100644
--- a/pkgs/development/tools/devpi-server/default.nix
+++ b/pkgs/development/tools/devpi-server/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages, nginx }:
+{ lib, fetchFromGitHub, python3Packages, nginx }:
 
 python3Packages.buildPythonApplication rec {
   pname = "devpi-server";
diff --git a/pkgs/development/tools/documentation/antora/default.nix b/pkgs/development/tools/documentation/antora/default.nix
index d553df59446a..ea8aeb83c8cd 100644
--- a/pkgs/development/tools/documentation/antora/default.nix
+++ b/pkgs/development/tools/documentation/antora/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, nodePackages }:
+{ lib, nodePackages }:
 
 let
   linkNodeDeps = ({ pkg, deps, name ? "" }:
diff --git a/pkgs/development/tools/documentation/gnome-doc-utils/default.nix b/pkgs/development/tools/documentation/gnome-doc-utils/default.nix
index 2e04d3dd365e..d031145a9977 100644
--- a/pkgs/development/tools/documentation/gnome-doc-utils/default.nix
+++ b/pkgs/development/tools/documentation/gnome-doc-utils/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, pkg-config, libxml2Python, libxslt, intltool, gnome3
+{ lib, fetchurl, pkg-config, libxml2Python, libxslt, intltool, gnome3
 , python2Packages }:
 
 python2Packages.buildPythonApplication rec {
diff --git a/pkgs/development/tools/documentation/gtk-doc/default.nix b/pkgs/development/tools/documentation/gtk-doc/default.nix
index b1ea6a0634b5..d82c288e5aad 100644
--- a/pkgs/development/tools/documentation/gtk-doc/default.nix
+++ b/pkgs/development/tools/documentation/gtk-doc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitLab
 , meson
 , ninja
diff --git a/pkgs/development/tools/documentation/mdsh/default.nix b/pkgs/development/tools/documentation/mdsh/default.nix
index d2e555a4550d..c8e6cafa27af 100644
--- a/pkgs/development/tools/documentation/mdsh/default.nix
+++ b/pkgs/development/tools/documentation/mdsh/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage rec {
   pname = "mdsh";
diff --git a/pkgs/development/tools/documentation/mkdocs/default.nix b/pkgs/development/tools/documentation/mkdocs/default.nix
index bee22856eb10..64d834f1bb29 100644
--- a/pkgs/development/tools/documentation/mkdocs/default.nix
+++ b/pkgs/development/tools/documentation/mkdocs/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, python3, fetchFromGitHub }:
+{ lib, python3, fetchFromGitHub }:
 
 with python3.pkgs;
 
diff --git a/pkgs/development/tools/easyjson/default.nix b/pkgs/development/tools/easyjson/default.nix
index a458f0dbfceb..75bfc1d4c14f 100644
--- a/pkgs/development/tools/easyjson/default.nix
+++ b/pkgs/development/tools/easyjson/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage {
   pname = "easyjson";
diff --git a/pkgs/development/tools/eliot-tree/default.nix b/pkgs/development/tools/eliot-tree/default.nix
index e60642c5fe60..adcedfe643c5 100644
--- a/pkgs/development/tools/eliot-tree/default.nix
+++ b/pkgs/development/tools/eliot-tree/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages }:
+{ lib, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   pname = "eliot-tree";
diff --git a/pkgs/development/tools/fac/default.nix b/pkgs/development/tools/fac/default.nix
index ef3298c54780..c50fd834e031 100644
--- a/pkgs/development/tools/fac/default.nix
+++ b/pkgs/development/tools/fac/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, makeWrapper, git }:
+{ lib, buildGoPackage, fetchFromGitHub, makeWrapper, git }:
 
 buildGoPackage rec {
   pname = "fac";
diff --git a/pkgs/development/tools/fedpkg/default.nix b/pkgs/development/tools/fedpkg/default.nix
index 285e71707fd5..d9633e88f346 100644
--- a/pkgs/development/tools/fedpkg/default.nix
+++ b/pkgs/development/tools/fedpkg/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonApplication, buildPythonPackage, isPy3k, fetchurl, rpkg, offtrac, urlgrabber, pyopenssl, python_fedora }:
+{ lib, buildPythonApplication, buildPythonPackage, isPy3k, fetchurl, rpkg, offtrac, urlgrabber, pyopenssl, python_fedora }:
 
 let
   fedora_cert = buildPythonPackage rec {
diff --git a/pkgs/development/tools/flootty/default.nix b/pkgs/development/tools/flootty/default.nix
index 4867b9c2cb99..e4f76ca9f6af 100644
--- a/pkgs/development/tools/flootty/default.nix
+++ b/pkgs/development/tools/flootty/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages }:
+{ lib, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   pname = "Flootty";
diff --git a/pkgs/development/tools/gauge/default.nix b/pkgs/development/tools/gauge/default.nix
index a0eb7370bee0..168910da06f5 100644
--- a/pkgs/development/tools/gauge/default.nix
+++ b/pkgs/development/tools/gauge/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "gauge";
diff --git a/pkgs/development/tools/gdm/default.nix b/pkgs/development/tools/gdm/default.nix
index 7c7f73af1e0f..7ecb7895d2f9 100644
--- a/pkgs/development/tools/gdm/default.nix
+++ b/pkgs/development/tools/gdm/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "gdm";
diff --git a/pkgs/development/tools/ginkgo/default.nix b/pkgs/development/tools/ginkgo/default.nix
index b65e7c6a5eef..05db94c7f1e8 100644
--- a/pkgs/development/tools/ginkgo/default.nix
+++ b/pkgs/development/tools/ginkgo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "ginkgo";
diff --git a/pkgs/development/tools/gir/default.nix b/pkgs/development/tools/gir/default.nix
index 8f38b41f7ae2..c88ffef4df12 100644
--- a/pkgs/development/tools/gir/default.nix
+++ b/pkgs/development/tools/gir/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage rec {
   pname = "gir";
diff --git a/pkgs/development/tools/git-series/default.nix b/pkgs/development/tools/git-series/default.nix
index 4f13c3de40bb..0f7677c7aa26 100644
--- a/pkgs/development/tools/git-series/default.nix
+++ b/pkgs/development/tools/git-series/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, fetchpatch, rustPlatform
+{ lib, fetchFromGitHub, fetchpatch, rustPlatform
 , openssl, cmake, perl, pkg-config, zlib, curl, libgit2, libssh2
 }:
 
diff --git a/pkgs/development/tools/github/cligh/default.nix b/pkgs/development/tools/github/cligh/default.nix
index dfe66c789ca4..ce340239ac4c 100644
--- a/pkgs/development/tools/github/cligh/default.nix
+++ b/pkgs/development/tools/github/cligh/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonApplication, pyxdg, PyGithub }:
+{ lib, fetchFromGitHub, buildPythonApplication, pyxdg, PyGithub }:
 
 buildPythonApplication rec {
   pname = "cligh";
diff --git a/pkgs/development/tools/glide/default.nix b/pkgs/development/tools/glide/default.nix
index f8abde7e00a7..05e4ae810612 100644
--- a/pkgs/development/tools/glide/default.nix
+++ b/pkgs/development/tools/glide/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "glide";
diff --git a/pkgs/development/tools/gllvm/default.nix b/pkgs/development/tools/gllvm/default.nix
index f2c552252fb2..78038440a96d 100644
--- a/pkgs/development/tools/gllvm/default.nix
+++ b/pkgs/development/tools/gllvm/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "gllvm";
diff --git a/pkgs/development/tools/glock/default.nix b/pkgs/development/tools/glock/default.nix
index c00478c9fb6a..b2d1e09e74f3 100644
--- a/pkgs/development/tools/glock/default.nix
+++ b/pkgs/development/tools/glock/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "glock";
diff --git a/pkgs/development/tools/go-bindata-assetfs/default.nix b/pkgs/development/tools/go-bindata-assetfs/default.nix
index 57d0e93a9b0c..5131436e0248 100644
--- a/pkgs/development/tools/go-bindata-assetfs/default.nix
+++ b/pkgs/development/tools/go-bindata-assetfs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "go-bindata-assetfs";
diff --git a/pkgs/development/tools/go-bindata/default.nix b/pkgs/development/tools/go-bindata/default.nix
index 5d257bbf9982..3b73c5273159 100644
--- a/pkgs/development/tools/go-bindata/default.nix
+++ b/pkgs/development/tools/go-bindata/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage {
   pname = "go-bindata";
diff --git a/pkgs/development/tools/go-junit-report/default.nix b/pkgs/development/tools/go-junit-report/default.nix
index f1e822e3633f..110cdbfabc9f 100644
--- a/pkgs/development/tools/go-junit-report/default.nix
+++ b/pkgs/development/tools/go-junit-report/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "go-junit-report-unstable";
diff --git a/pkgs/development/tools/go-langserver/default.nix b/pkgs/development/tools/go-langserver/default.nix
index fdefd6b0178b..ac6034dffa42 100644
--- a/pkgs/development/tools/go-langserver/default.nix
+++ b/pkgs/development/tools/go-langserver/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "go-langserver";
diff --git a/pkgs/development/tools/go-migrate/default.nix b/pkgs/development/tools/go-migrate/default.nix
index 1786bfe5f0f9..d07e3cd80d32 100644
--- a/pkgs/development/tools/go-migrate/default.nix
+++ b/pkgs/development/tools/go-migrate/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "go-migrate";
diff --git a/pkgs/development/tools/go-outline/default.nix b/pkgs/development/tools/go-outline/default.nix
index d30d5c30f3a1..fe4c2e8d4dfd 100644
--- a/pkgs/development/tools/go-outline/default.nix
+++ b/pkgs/development/tools/go-outline/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "go-outline";
diff --git a/pkgs/development/tools/go-protobuf/default.nix b/pkgs/development/tools/go-protobuf/default.nix
index 0187552d8445..1fa027ae72b9 100644
--- a/pkgs/development/tools/go-protobuf/default.nix
+++ b/pkgs/development/tools/go-protobuf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "go-protobuf";
diff --git a/pkgs/development/tools/go-repo-root/default.nix b/pkgs/development/tools/go-repo-root/default.nix
index 25fc87f8985d..b7653aa144e4 100644
--- a/pkgs/development/tools/go-repo-root/default.nix
+++ b/pkgs/development/tools/go-repo-root/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   pname = "go-repo-root";
diff --git a/pkgs/development/tools/go-symbols/default.nix b/pkgs/development/tools/go-symbols/default.nix
index 3f41007716e7..a259b768561b 100644
--- a/pkgs/development/tools/go-symbols/default.nix
+++ b/pkgs/development/tools/go-symbols/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "go-symbols";
diff --git a/pkgs/development/tools/go2nix/default.nix b/pkgs/development/tools/go2nix/default.nix
index bcd1f56f5256..b5a224cb5ae7 100644
--- a/pkgs/development/tools/go2nix/default.nix
+++ b/pkgs/development/tools/go2nix/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, go-bindata, gotools, nix-prefetch-git, git, makeWrapper,
+{ lib, buildGoPackage, go-bindata, gotools, nix-prefetch-git, git, makeWrapper,
   fetchFromGitHub }:
 
 buildGoPackage rec {
diff --git a/pkgs/development/tools/goa/default.nix b/pkgs/development/tools/goa/default.nix
index 63322b6d3639..56b47bd8c601 100644
--- a/pkgs/development/tools/goa/default.nix
+++ b/pkgs/development/tools/goa/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "goa";
diff --git a/pkgs/development/tools/gocode-gomod/default.nix b/pkgs/development/tools/gocode-gomod/default.nix
index 995bd3102cc0..f610b19d79b9 100644
--- a/pkgs/development/tools/gocode-gomod/default.nix
+++ b/pkgs/development/tools/gocode-gomod/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "gocode-gomod";
diff --git a/pkgs/development/tools/gocode/default.nix b/pkgs/development/tools/gocode/default.nix
index 9bed4073b2b3..be9f70da9341 100644
--- a/pkgs/development/tools/gocode/default.nix
+++ b/pkgs/development/tools/gocode/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "gocode-unstable";
diff --git a/pkgs/development/tools/goconvey/default.nix b/pkgs/development/tools/goconvey/default.nix
index dcec045e5ebc..fb6ce653cc4b 100644
--- a/pkgs/development/tools/goconvey/default.nix
+++ b/pkgs/development/tools/goconvey/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "goconvey";
diff --git a/pkgs/development/tools/godef/default.nix b/pkgs/development/tools/godef/default.nix
index 6d4f40ba6bca..99fe932013e7 100644
--- a/pkgs/development/tools/godef/default.nix
+++ b/pkgs/development/tools/godef/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "godef";
diff --git a/pkgs/development/tools/godot/headless.nix b/pkgs/development/tools/godot/headless.nix
index 20d3b48f2fd5..a8d640eba1aa 100644
--- a/pkgs/development/tools/godot/headless.nix
+++ b/pkgs/development/tools/godot/headless.nix
@@ -1,4 +1,4 @@
-{ godot, lib, stdenv }:
+{ godot, lib }:
 godot.overrideAttrs (oldAttrs: rec {
   pname = "godot-headless";
   sconsFlags = "target=release_debug platform=server tools=yes";
diff --git a/pkgs/development/tools/godot/server.nix b/pkgs/development/tools/godot/server.nix
index 6ce347355e3b..4254dc746b66 100644
--- a/pkgs/development/tools/godot/server.nix
+++ b/pkgs/development/tools/godot/server.nix
@@ -1,4 +1,4 @@
-{ godot, lib, stdenv }:
+{ godot, lib }:
 godot.overrideAttrs (oldAttrs: rec {
   pname = "godot-server";
   sconsFlags = "target=release platform=server tools=no";
diff --git a/pkgs/development/tools/gojsontoyaml/default.nix b/pkgs/development/tools/gojsontoyaml/default.nix
index 0f772134a0e2..0fd45598a837 100644
--- a/pkgs/development/tools/gojsontoyaml/default.nix
+++ b/pkgs/development/tools/gojsontoyaml/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "gojsontoyaml";
diff --git a/pkgs/development/tools/golint/default.nix b/pkgs/development/tools/golint/default.nix
index 1f75384f3387..89b9f1464950 100644
--- a/pkgs/development/tools/golint/default.nix
+++ b/pkgs/development/tools/golint/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   pname = "lint";
diff --git a/pkgs/development/tools/gomodifytags/default.nix b/pkgs/development/tools/gomodifytags/default.nix
index 650f1b89f30e..254113f21064 100644
--- a/pkgs/development/tools/gomodifytags/default.nix
+++ b/pkgs/development/tools/gomodifytags/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "gomodifytags";
diff --git a/pkgs/development/tools/gomplate/default.nix b/pkgs/development/tools/gomplate/default.nix
index f8d6553f74d8..0f2c95581743 100644
--- a/pkgs/development/tools/gomplate/default.nix
+++ b/pkgs/development/tools/gomplate/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "gomplate";
diff --git a/pkgs/development/tools/gopkgs/default.nix b/pkgs/development/tools/gopkgs/default.nix
index e4a72cb27a17..a5413c6a9c05 100644
--- a/pkgs/development/tools/gopkgs/default.nix
+++ b/pkgs/development/tools/gopkgs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "gopkgs";
diff --git a/pkgs/development/tools/gopls/default.nix b/pkgs/development/tools/gopls/default.nix
index 7a7c98e28940..1617900acee7 100644
--- a/pkgs/development/tools/gopls/default.nix
+++ b/pkgs/development/tools/gopls/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchgit }:
+{ lib, buildGoModule, fetchgit }:
 
 buildGoModule rec {
   pname = "gopls";
diff --git a/pkgs/development/tools/gore/default.nix b/pkgs/development/tools/gore/default.nix
index 30d7cd1ef336..43bb2d2aad7b 100644
--- a/pkgs/development/tools/gore/default.nix
+++ b/pkgs/development/tools/gore/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "gore";
diff --git a/pkgs/development/tools/gosec/default.nix b/pkgs/development/tools/gosec/default.nix
index 69d74496e615..1ebb6e71713c 100644
--- a/pkgs/development/tools/gosec/default.nix
+++ b/pkgs/development/tools/gosec/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "gosec";
diff --git a/pkgs/development/tools/gotags/default.nix b/pkgs/development/tools/gotags/default.nix
index ea40bd0e6fe1..274f7a476c2b 100644
--- a/pkgs/development/tools/gotags/default.nix
+++ b/pkgs/development/tools/gotags/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   pname = "gotags";
diff --git a/pkgs/development/tools/gotests/default.nix b/pkgs/development/tools/gotests/default.nix
index 87a93abee8ef..faa2e60aca40 100644
--- a/pkgs/development/tools/gotests/default.nix
+++ b/pkgs/development/tools/gotests/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "gotests";
diff --git a/pkgs/development/tools/gotestsum/default.nix b/pkgs/development/tools/gotestsum/default.nix
index ece194f00030..435edd61623b 100644
--- a/pkgs/development/tools/gotestsum/default.nix
+++ b/pkgs/development/tools/gotestsum/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoModule }:
+{ lib, fetchFromGitHub, buildGoModule }:
 
 buildGoModule rec {
   pname = "gotestsum";
diff --git a/pkgs/development/tools/gotools/default.nix b/pkgs/development/tools/gotools/default.nix
index 7ca3486a503a..285d546d7421 100644
--- a/pkgs/development/tools/gotools/default.nix
+++ b/pkgs/development/tools/gotools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchgit }:
+{ lib, buildGoModule, fetchgit }:
 
 buildGoModule rec {
   pname = "gotools-unstable";
diff --git a/pkgs/development/tools/govendor/default.nix b/pkgs/development/tools/govendor/default.nix
index edd9b577be4c..b24afebb3aa3 100644
--- a/pkgs/development/tools/govendor/default.nix
+++ b/pkgs/development/tools/govendor/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "govendor";
diff --git a/pkgs/development/tools/govers/default.nix b/pkgs/development/tools/govers/default.nix
index cac76daa6fc3..5e2d89cfd5df 100644
--- a/pkgs/development/tools/govers/default.nix
+++ b/pkgs/development/tools/govers/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   pname = "govers";
diff --git a/pkgs/development/tools/gox/default.nix b/pkgs/development/tools/gox/default.nix
index 3deb73acb441..4aa7a314c876 100644
--- a/pkgs/development/tools/gox/default.nix
+++ b/pkgs/development/tools/gox/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "gox";
diff --git a/pkgs/development/tools/gron/default.nix b/pkgs/development/tools/gron/default.nix
index 6d182b0b5f50..f486bc95bc17 100644
--- a/pkgs/development/tools/gron/default.nix
+++ b/pkgs/development/tools/gron/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "gron";
diff --git a/pkgs/development/tools/haskell/dconf2nix/dconf2nix.nix b/pkgs/development/tools/haskell/dconf2nix/dconf2nix.nix
index 02c4c96bd8e7..b857b910f0a5 100644
--- a/pkgs/development/tools/haskell/dconf2nix/dconf2nix.nix
+++ b/pkgs/development/tools/haskell/dconf2nix/dconf2nix.nix
@@ -1,5 +1,5 @@
 { mkDerivation, base, containers, fetchgit, hedgehog
-, optparse-applicative, parsec, lib, stdenv, template-haskell, text
+, optparse-applicative, parsec, lib, template-haskell, text
 }:
 mkDerivation {
   pname = "dconf2nix";
diff --git a/pkgs/development/tools/haskell/haskell-language-server/default.nix b/pkgs/development/tools/haskell/haskell-language-server/default.nix
index 512aec84eead..71b6355db58d 100644
--- a/pkgs/development/tools/haskell/haskell-language-server/default.nix
+++ b/pkgs/development/tools/haskell/haskell-language-server/default.nix
@@ -7,7 +7,7 @@
 , hls-tactics-plugin, hslogger, hspec, hspec-core
 , hspec-expectations, lens, lsp-test, mtl, optparse-applicative
 , optparse-simple, ormolu, process, regex-tdfa, safe-exceptions
-, shake, lib, stdenv, stm, stylish-haskell, tasty, tasty-ant-xml
+, shake, lib, stm, stylish-haskell, tasty, tasty-ant-xml
 , tasty-expected-failure, tasty-golden, tasty-hunit, tasty-rerun
 , temporary, text, transformers, unordered-containers, with-utf8
 , yaml
diff --git a/pkgs/development/tools/haskell/haskell-language-server/hls-class-plugin.nix b/pkgs/development/tools/haskell/haskell-language-server/hls-class-plugin.nix
index c51689343903..b757dc8c9e86 100644
--- a/pkgs/development/tools/haskell/haskell-language-server/hls-class-plugin.nix
+++ b/pkgs/development/tools/haskell/haskell-language-server/hls-class-plugin.nix
@@ -1,6 +1,6 @@
 { mkDerivation, aeson, base, containers, fetchgit, ghc
 , ghc-exactprint, ghcide, haskell-lsp, hls-plugin-api, lens, shake
-, lib, stdenv, text, transformers, unordered-containers
+, lib, text, transformers, unordered-containers
 }:
 mkDerivation {
   pname = "hls-class-plugin";
diff --git a/pkgs/development/tools/haskell/haskell-language-server/hls-eval-plugin.nix b/pkgs/development/tools/haskell/haskell-language-server/hls-eval-plugin.nix
index b5774ddcbfd3..2677b45a591d 100644
--- a/pkgs/development/tools/haskell/haskell-language-server/hls-eval-plugin.nix
+++ b/pkgs/development/tools/haskell/haskell-language-server/hls-eval-plugin.nix
@@ -2,7 +2,7 @@
 , extra, fetchgit, filepath, ghc, ghc-boot-th, ghc-paths, ghcide
 , hashable, haskell-lsp, haskell-lsp-types, hls-plugin-api
 , parser-combinators, pretty-simple, QuickCheck, safe-exceptions
-, shake, lib, stdenv, temporary, text, time, transformers
+, shake, lib, temporary, text, time, transformers
 , unordered-containers
 }:
 mkDerivation {
diff --git a/pkgs/development/tools/haskell/haskell-language-server/hls-explicit-imports-plugin.nix b/pkgs/development/tools/haskell/haskell-language-server/hls-explicit-imports-plugin.nix
index 1c7d31004b6a..8207b5181ba1 100644
--- a/pkgs/development/tools/haskell/haskell-language-server/hls-explicit-imports-plugin.nix
+++ b/pkgs/development/tools/haskell/haskell-language-server/hls-explicit-imports-plugin.nix
@@ -1,5 +1,5 @@
 { mkDerivation, aeson, base, containers, deepseq, fetchgit, ghc
-, ghcide, haskell-lsp-types, hls-plugin-api, shake, lib, stdenv, text
+, ghcide, haskell-lsp-types, hls-plugin-api, shake, lib, text
 , unordered-containers
 }:
 mkDerivation {
diff --git a/pkgs/development/tools/haskell/haskell-language-server/hls-hlint-plugin.nix b/pkgs/development/tools/haskell/haskell-language-server/hls-hlint-plugin.nix
index 4a90933d1e7f..02e314cba3a1 100644
--- a/pkgs/development/tools/haskell/haskell-language-server/hls-hlint-plugin.nix
+++ b/pkgs/development/tools/haskell/haskell-language-server/hls-hlint-plugin.nix
@@ -2,7 +2,7 @@
 , containers, data-default, deepseq, Diff, directory, extra
 , fetchgit, filepath, ghc, ghc-lib, ghc-lib-parser-ex, ghcide
 , hashable, haskell-lsp, hlint, hls-plugin-api, hslogger, lens
-, regex-tdfa, shake, lib, stdenv, temporary, text, transformers
+, regex-tdfa, shake, lib, temporary, text, transformers
 , unordered-containers
 }:
 mkDerivation {
diff --git a/pkgs/development/tools/haskell/haskell-language-server/hls-retrie-plugin.nix b/pkgs/development/tools/haskell/haskell-language-server/hls-retrie-plugin.nix
index 311a26633a5c..cca8acb8819e 100644
--- a/pkgs/development/tools/haskell/haskell-language-server/hls-retrie-plugin.nix
+++ b/pkgs/development/tools/haskell/haskell-language-server/hls-retrie-plugin.nix
@@ -1,6 +1,6 @@
 { mkDerivation, aeson, base, containers, deepseq, directory, extra
 , fetchgit, ghc, ghcide, hashable, haskell-lsp, haskell-lsp-types
-, hls-plugin-api, retrie, safe-exceptions, shake, lib, stdenv, text
+, hls-plugin-api, retrie, safe-exceptions, shake, lib, text
 , transformers, unordered-containers
 }:
 mkDerivation {
diff --git a/pkgs/development/tools/haskell/haskell-language-server/hls-tactics-plugin.nix b/pkgs/development/tools/haskell/haskell-language-server/hls-tactics-plugin.nix
index 4f476431d9b7..369ce0e27b86 100644
--- a/pkgs/development/tools/haskell/haskell-language-server/hls-tactics-plugin.nix
+++ b/pkgs/development/tools/haskell/haskell-language-server/hls-tactics-plugin.nix
@@ -2,7 +2,7 @@
 , directory, extra, fetchgit, filepath, fingertree, generic-lens
 , ghc, ghc-boot-th, ghc-exactprint, ghc-source-gen, ghcide
 , haskell-lsp, hie-bios, hls-plugin-api, hspec, hspec-discover
-, lens, mtl, QuickCheck, refinery, retrie, shake, lib, stdenv, syb, text
+, lens, mtl, QuickCheck, refinery, retrie, shake, lib, syb, text
 , transformers
 }:
 mkDerivation {
diff --git a/pkgs/development/tools/haskell/vaultenv/default.nix b/pkgs/development/tools/haskell/vaultenv/default.nix
index 42cf33224201..8c817e8eeef0 100644
--- a/pkgs/development/tools/haskell/vaultenv/default.nix
+++ b/pkgs/development/tools/haskell/vaultenv/default.nix
@@ -1,7 +1,7 @@
 { mkDerivation, async, base, bytestring, connection, containers
 , directory, hpack, hspec, hspec-discover, hspec-expectations
 , http-client, http-conduit, lens, lens-aeson, megaparsec, mtl
-, optparse-applicative, parser-combinators, retry, lib, stdenv, text
+, optparse-applicative, parser-combinators, retry, lib, text
 , unix, unordered-containers, utf8-string, fetchzip, dotenv
 }:
 mkDerivation rec {
diff --git a/pkgs/development/tools/hcloud/default.nix b/pkgs/development/tools/hcloud/default.nix
index 5c4fe48f60fb..3e6ef4d4d342 100644
--- a/pkgs/development/tools/hcloud/default.nix
+++ b/pkgs/development/tools/hcloud/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, installShellFiles }:
+{ lib, buildGoModule, fetchFromGitHub, installShellFiles }:
 
 buildGoModule rec {
   pname = "hcloud";
diff --git a/pkgs/development/tools/icr/default.nix b/pkgs/development/tools/icr/default.nix
index ca052c0f210a..11e52f77cb80 100644
--- a/pkgs/development/tools/icr/default.nix
+++ b/pkgs/development/tools/icr/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , fetchFromGitHub
 , crystal
 , shards
diff --git a/pkgs/development/tools/jd/default.nix b/pkgs/development/tools/jd/default.nix
index 772e2802ff57..96d2807b9ab9 100644
--- a/pkgs/development/tools/jd/default.nix
+++ b/pkgs/development/tools/jd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   pname = "jd";
diff --git a/pkgs/development/tools/jid/default.nix b/pkgs/development/tools/jid/default.nix
index 5e4e3df69427..b48de54dd22e 100644
--- a/pkgs/development/tools/jid/default.nix
+++ b/pkgs/development/tools/jid/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "jid";
diff --git a/pkgs/development/tools/jira_cli/default.nix b/pkgs/development/tools/jira_cli/default.nix
index 7b7647da033e..cf15a61477e4 100644
--- a/pkgs/development/tools/jira_cli/default.nix
+++ b/pkgs/development/tools/jira_cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, libffi, openssl, python3Packages }:
+{ lib, libffi, openssl, python3Packages }:
 let
   inherit (python3Packages) fetchPypi buildPythonApplication vcrpy mock hiro;
 in
diff --git a/pkgs/development/tools/jl/default.nix b/pkgs/development/tools/jl/default.nix
index e0bf896c149f..15347432f70e 100644
--- a/pkgs/development/tools/jl/default.nix
+++ b/pkgs/development/tools/jl/default.nix
@@ -1,6 +1,6 @@
 { mkDerivation, fetchFromGitHub, fetchpatch
 , aeson, aeson-pretty, attoparsec, base, bytestring, conduit, conduit-extra
-, containers, exceptions, mtl, optparse-simple, parsec, scientific, lib, stdenv
+, containers, exceptions, mtl, optparse-simple, parsec, scientific, lib
 , text, unordered-containers, vector
 }:
 mkDerivation rec {
diff --git a/pkgs/development/tools/jmespath/default.nix b/pkgs/development/tools/jmespath/default.nix
index f5a7092e60f9..5abbf71e7f41 100644
--- a/pkgs/development/tools/jmespath/default.nix
+++ b/pkgs/development/tools/jmespath/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "jmespath";
diff --git a/pkgs/development/tools/jp/default.nix b/pkgs/development/tools/jp/default.nix
index d8d703feed30..f1f5b37c10dc 100644
--- a/pkgs/development/tools/jp/default.nix
+++ b/pkgs/development/tools/jp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "jp";
diff --git a/pkgs/development/tools/just/default.nix b/pkgs/development/tools/just/default.nix
index bbdd1bd016d5..e96d8f38af4e 100644
--- a/pkgs/development/tools/just/default.nix
+++ b/pkgs/development/tools/just/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform, coreutils, bash, installShellFiles }:
+{ lib, fetchFromGitHub, rustPlatform, coreutils, bash, installShellFiles }:
 
 rustPlatform.buildRustPackage rec {
   pname = "just";
diff --git a/pkgs/development/tools/k6/default.nix b/pkgs/development/tools/k6/default.nix
index 6a8fe4caf01b..6a94d40c2062 100644
--- a/pkgs/development/tools/k6/default.nix
+++ b/pkgs/development/tools/k6/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "k6";
diff --git a/pkgs/development/tools/kcli/default.nix b/pkgs/development/tools/kcli/default.nix
index 6c9f62c6f72d..9cd1c976162f 100644
--- a/pkgs/development/tools/kcli/default.nix
+++ b/pkgs/development/tools/kcli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "kcli";
diff --git a/pkgs/development/tools/kind/default.nix b/pkgs/development/tools/kind/default.nix
index 3fff2aae1f4d..47b23ae2342d 100644
--- a/pkgs/development/tools/kind/default.nix
+++ b/pkgs/development/tools/kind/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, installShellFiles }:
+{ lib, buildGoModule, fetchFromGitHub, installShellFiles }:
 
 with lib;
 
diff --git a/pkgs/development/tools/krew/default.nix b/pkgs/development/tools/krew/default.nix
index 7449d6df38eb..f2a4f390f82c 100644
--- a/pkgs/development/tools/krew/default.nix
+++ b/pkgs/development/tools/krew/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "krew";
diff --git a/pkgs/development/tools/kubectx/default.nix b/pkgs/development/tools/kubectx/default.nix
index f2186709e835..469558553323 100644
--- a/pkgs/development/tools/kubectx/default.nix
+++ b/pkgs/development/tools/kubectx/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, installShellFiles }:
+{ lib, buildGoModule, fetchFromGitHub, installShellFiles }:
 
 buildGoModule rec {
   pname = "kubectx";
diff --git a/pkgs/development/tools/kubeprompt/default.nix b/pkgs/development/tools/kubeprompt/default.nix
index 4fc8f3253429..39cd59cbec6c 100644
--- a/pkgs/development/tools/kubeprompt/default.nix
+++ b/pkgs/development/tools/kubeprompt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "kubeprompt";
diff --git a/pkgs/development/tools/kubicorn/default.nix b/pkgs/development/tools/kubicorn/default.nix
index f0985277a25e..706b91aad251 100644
--- a/pkgs/development/tools/kubicorn/default.nix
+++ b/pkgs/development/tools/kubicorn/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 with lib;
 
diff --git a/pkgs/development/tools/lazygit/default.nix b/pkgs/development/tools/lazygit/default.nix
index 1e8ebb0d0879..a2707eb72e99 100644
--- a/pkgs/development/tools/lazygit/default.nix
+++ b/pkgs/development/tools/lazygit/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "lazygit";
diff --git a/pkgs/development/tools/leaps/default.nix b/pkgs/development/tools/leaps/default.nix
index e68542e584f2..934881b6781c 100644
--- a/pkgs/development/tools/leaps/default.nix
+++ b/pkgs/development/tools/leaps/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "leaps";
diff --git a/pkgs/development/tools/manul/default.nix b/pkgs/development/tools/manul/default.nix
index 4265c2a74501..306c9143c5c6 100644
--- a/pkgs/development/tools/manul/default.nix
+++ b/pkgs/development/tools/manul/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage {
   name = "manul-unstable-2016-09-30";
diff --git a/pkgs/development/tools/misc/circleci-cli/default.nix b/pkgs/development/tools/misc/circleci-cli/default.nix
index 73ea64f1d62c..140e4869e88a 100644
--- a/pkgs/development/tools/misc/circleci-cli/default.nix
+++ b/pkgs/development/tools/misc/circleci-cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoModule }:
+{ lib, fetchFromGitHub, buildGoModule }:
 
 buildGoModule rec {
   pname = "circleci-cli";
diff --git a/pkgs/development/tools/misc/d-feet/default.nix b/pkgs/development/tools/misc/d-feet/default.nix
index 60d3c5c45394..5c130a99c926 100644
--- a/pkgs/development/tools/misc/d-feet/default.nix
+++ b/pkgs/development/tools/misc/d-feet/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , pkg-config
 , fetchurl
 , meson
diff --git a/pkgs/development/tools/misc/docopts/default.nix b/pkgs/development/tools/misc/docopts/default.nix
index 3614270574e4..74450bdfe737 100644
--- a/pkgs/development/tools/misc/docopts/default.nix
+++ b/pkgs/development/tools/misc/docopts/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "docopts";
diff --git a/pkgs/development/tools/misc/elfinfo/default.nix b/pkgs/development/tools/misc/elfinfo/default.nix
index cd19e263f0a5..e3ee51c58fdc 100644
--- a/pkgs/development/tools/misc/elfinfo/default.nix
+++ b/pkgs/development/tools/misc/elfinfo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "elfinfo";
diff --git a/pkgs/development/tools/misc/gdbgui/default.nix b/pkgs/development/tools/misc/gdbgui/default.nix
index c01bb61f4f69..92338bb0323a 100644
--- a/pkgs/development/tools/misc/gdbgui/default.nix
+++ b/pkgs/development/tools/misc/gdbgui/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonApplication
 , fetchPypi
 , gdb
diff --git a/pkgs/development/tools/misc/itm-tools/default.nix b/pkgs/development/tools/misc/itm-tools/default.nix
index 992b76bd62da..32c32b536d9d 100644
--- a/pkgs/development/tools/misc/itm-tools/default.nix
+++ b/pkgs/development/tools/misc/itm-tools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform, pkg-config }:
+{ lib, fetchFromGitHub, rustPlatform, pkg-config }:
 
 rustPlatform.buildRustPackage rec {
   pname = "itm-tools";
diff --git a/pkgs/development/tools/misc/loccount/default.nix b/pkgs/development/tools/misc/loccount/default.nix
index 59bab3742a26..32a14404c606 100644
--- a/pkgs/development/tools/misc/loccount/default.nix
+++ b/pkgs/development/tools/misc/loccount/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitLab }:
+{ lib, buildGoPackage, fetchFromGitLab }:
 buildGoPackage rec {
   pname = "loccount";
   version = "1.2";
diff --git a/pkgs/development/tools/misc/nrfutil/default.nix b/pkgs/development/tools/misc/nrfutil/default.nix
index a8a18b254b98..6d58a39f7049 100644
--- a/pkgs/development/tools/misc/nrfutil/default.nix
+++ b/pkgs/development/tools/misc/nrfutil/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python37Packages, fetchFromGitHub }:
+{ lib, python37Packages, fetchFromGitHub }:
 
 with python37Packages; buildPythonApplication rec {
   pname = "nrfutil";
diff --git a/pkgs/development/tools/misc/perfect-hash/default.nix b/pkgs/development/tools/misc/perfect-hash/default.nix
index 7447bf660226..71747f0d1172 100644
--- a/pkgs/development/tools/misc/perfect-hash/default.nix
+++ b/pkgs/development/tools/misc/perfect-hash/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3, fetchFromGitHub }:
+{ lib, python3, fetchFromGitHub }:
 python3.pkgs.buildPythonApplication rec {
   pname = "perfect-hash";
   version = "0.4.1";
diff --git a/pkgs/development/tools/misc/ptags/default.nix b/pkgs/development/tools/misc/ptags/default.nix
index 0ef7a2aa73a4..8406ecf298f8 100644
--- a/pkgs/development/tools/misc/ptags/default.nix
+++ b/pkgs/development/tools/misc/ptags/default.nix
@@ -2,7 +2,7 @@
 , cargo
 , lib
 , rustPlatform
-, stdenv
+
 }:
 
 rustPlatform.buildRustPackage rec {
diff --git a/pkgs/development/tools/misc/scc/default.nix b/pkgs/development/tools/misc/scc/default.nix
index 49052c141a1a..8a5cbbcfdfae 100644
--- a/pkgs/development/tools/misc/scc/default.nix
+++ b/pkgs/development/tools/misc/scc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "scc";
diff --git a/pkgs/development/tools/misc/unused/default.nix b/pkgs/development/tools/misc/unused/default.nix
index 6487c3fc2c0c..1a5f3efe0e6a 100644
--- a/pkgs/development/tools/misc/unused/default.nix
+++ b/pkgs/development/tools/misc/unused/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform, cmake }:
+{ lib, fetchFromGitHub, rustPlatform, cmake }:
 rustPlatform.buildRustPackage rec {
   pname = "unused";
   version = "0.2.1";
diff --git a/pkgs/development/tools/misc/whatstyle/default.nix b/pkgs/development/tools/misc/whatstyle/default.nix
index 6afcfe871a47..d448251bf13d 100644
--- a/pkgs/development/tools/misc/whatstyle/default.nix
+++ b/pkgs/development/tools/misc/whatstyle/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3, fetchFromGitHub, clang-unwrapped }:
+{ lib, python3, fetchFromGitHub, clang-unwrapped }:
 
 python3.pkgs.buildPythonApplication rec {
   pname = "whatstyle";
diff --git a/pkgs/development/tools/modd/default.nix b/pkgs/development/tools/modd/default.nix
index efe4c9605668..c42e364b88ed 100644
--- a/pkgs/development/tools/modd/default.nix
+++ b/pkgs/development/tools/modd/default.nix
@@ -1,4 +1,4 @@
-{ buildGoPackage, fetchFromGitHub, lib, stdenv }:
+{ buildGoPackage, fetchFromGitHub, lib }:
 
 buildGoPackage rec {
   pname = "modd";
diff --git a/pkgs/development/tools/mustache-go/default.nix b/pkgs/development/tools/mustache-go/default.nix
index 99e4eb621564..40181f16288a 100644
--- a/pkgs/development/tools/mustache-go/default.nix
+++ b/pkgs/development/tools/mustache-go/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "mustache-go";
diff --git a/pkgs/development/tools/ofono-phonesim/default.nix b/pkgs/development/tools/ofono-phonesim/default.nix
index 82ed82a67bdc..c9728f9cbbf6 100644
--- a/pkgs/development/tools/ofono-phonesim/default.nix
+++ b/pkgs/development/tools/ofono-phonesim/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , mkDerivation
 , fetchgit
 , autoreconfHook
diff --git a/pkgs/development/tools/out-of-tree/default.nix b/pkgs/development/tools/out-of-tree/default.nix
index 9ab69d1d5d85..4547012e2f32 100644
--- a/pkgs/development/tools/out-of-tree/default.nix
+++ b/pkgs/development/tools/out-of-tree/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchgit, qemu, docker, which, makeWrapper }:
+{ lib, buildGoModule, fetchgit, qemu, docker, which, makeWrapper }:
 
 buildGoModule rec {
   pname = "out-of-tree";
diff --git a/pkgs/development/tools/packer/default.nix b/pkgs/development/tools/packer/default.nix
index d4dd46cdcb5c..16e5ac082039 100644
--- a/pkgs/development/tools/packer/default.nix
+++ b/pkgs/development/tools/packer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 buildGoPackage rec {
   pname = "packer";
   version = "1.6.6";
diff --git a/pkgs/development/tools/packet-cli/default.nix b/pkgs/development/tools/packet-cli/default.nix
index ec07e4b058ee..79457643ce67 100644
--- a/pkgs/development/tools/packet-cli/default.nix
+++ b/pkgs/development/tools/packet-cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "packet-cli";
diff --git a/pkgs/development/tools/packet/default.nix b/pkgs/development/tools/packet/default.nix
index 31ccf19bb05f..723e5d8bb2d1 100644
--- a/pkgs/development/tools/packet/default.nix
+++ b/pkgs/development/tools/packet/default.nix
@@ -1,5 +1,5 @@
 # This file was generated by https://github.com/kamilchm/go2nix v1.2.1
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   pname = "packet";
diff --git a/pkgs/development/tools/parinfer-rust/default.nix b/pkgs/development/tools/parinfer-rust/default.nix
index 79c8f3791880..ce733b8a2131 100644
--- a/pkgs/development/tools/parinfer-rust/default.nix
+++ b/pkgs/development/tools/parinfer-rust/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, rustPlatform, fetchFromGitHub, llvmPackages }:
+{ lib, rustPlatform, fetchFromGitHub, llvmPackages }:
 
 rustPlatform.buildRustPackage rec {
   pname = "parinfer-rust";
diff --git a/pkgs/development/tools/pax-rs/default.nix b/pkgs/development/tools/pax-rs/default.nix
index cda3ba5e8a8b..ff4219ad09c6 100644
--- a/pkgs/development/tools/pax-rs/default.nix
+++ b/pkgs/development/tools/pax-rs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, fetchurl, rustPlatform, runCommand } :
+{ lib, fetchFromGitHub, fetchurl, rustPlatform, runCommand } :
 with rustPlatform;
 
 buildRustPackage rec {
diff --git a/pkgs/development/tools/pew/default.nix b/pkgs/development/tools/pew/default.nix
index 6ca94041bb50..2d7294ec1052 100644
--- a/pkgs/development/tools/pew/default.nix
+++ b/pkgs/development/tools/pew/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3 }:
+{ lib, python3 }:
 
 with python3.pkgs;
 
diff --git a/pkgs/development/tools/profiling/pprof/default.nix b/pkgs/development/tools/profiling/pprof/default.nix
index dd2345378d43..eab000e8d8e4 100644
--- a/pkgs/development/tools/profiling/pprof/default.nix
+++ b/pkgs/development/tools/profiling/pprof/default.nix
@@ -1,5 +1,5 @@
 # This file was originally generated by https://github.com/kamilchm/go2nix v1.2.1
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   pname = "pprof-unstable";
diff --git a/pkgs/development/tools/purescript/spago/spago.nix b/pkgs/development/tools/purescript/spago/spago.nix
index 3f54a4f9c0ee..58458ea79aa2 100644
--- a/pkgs/development/tools/purescript/spago/spago.nix
+++ b/pkgs/development/tools/purescript/spago/spago.nix
@@ -6,7 +6,7 @@
 , http-conduit, http-types, lens-family-core, megaparsec, mtl
 , network-uri, open-browser, optparse-applicative, prettyprinter
 , process, QuickCheck, retry, rio, rio-orphans, safe, semver-range
-, lib, stdenv, stm, stringsearch, tar, template-haskell, temporary, text
+, lib, stm, stringsearch, tar, template-haskell, temporary, text
 , time, transformers, turtle, unliftio, unordered-containers
 , utf8-string, vector, versions, with-utf8, zlib
 }:
diff --git a/pkgs/development/tools/quicktemplate/default.nix b/pkgs/development/tools/quicktemplate/default.nix
index 4edb60d11a15..4fe51d3e0463 100644
--- a/pkgs/development/tools/quicktemplate/default.nix
+++ b/pkgs/development/tools/quicktemplate/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "quicktemplate";
diff --git a/pkgs/development/tools/rdbtools/default.nix b/pkgs/development/tools/rdbtools/default.nix
index 5674876daba6..e2f053c1e816 100644
--- a/pkgs/development/tools/rdbtools/default.nix
+++ b/pkgs/development/tools/rdbtools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python }:
+{ lib, python }:
 
 with python.pkgs;
 
diff --git a/pkgs/development/tools/remarshal/default.nix b/pkgs/development/tools/remarshal/default.nix
index c37779a5293b..385db11d7ff4 100644
--- a/pkgs/development/tools/remarshal/default.nix
+++ b/pkgs/development/tools/remarshal/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages }:
+{ lib, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   pname = "remarshal";
diff --git a/pkgs/development/tools/renderizer/default.nix b/pkgs/development/tools/renderizer/default.nix
index 747e80adf4f2..22bf5fbe904a 100644
--- a/pkgs/development/tools/renderizer/default.nix
+++ b/pkgs/development/tools/renderizer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "renderizer";
diff --git a/pkgs/development/tools/reno/default.nix b/pkgs/development/tools/reno/default.nix
index 17a334aba205..ca01f6ebfa27 100644
--- a/pkgs/development/tools/reno/default.nix
+++ b/pkgs/development/tools/reno/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , git
 , gnupg1
 , python3Packages
diff --git a/pkgs/development/tools/richgo/default.nix b/pkgs/development/tools/richgo/default.nix
index 1013c4aa8b43..81a912171f33 100644
--- a/pkgs/development/tools/richgo/default.nix
+++ b/pkgs/development/tools/richgo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "richgo";
diff --git a/pkgs/development/tools/run/default.nix b/pkgs/development/tools/run/default.nix
index a0c169d84661..45fb2b8f9578 100644
--- a/pkgs/development/tools/run/default.nix
+++ b/pkgs/development/tools/run/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 buildGoModule rec {
   pname = "run";
   version = "0.7.2";
diff --git a/pkgs/development/tools/rust/bindgen/default.nix b/pkgs/development/tools/rust/bindgen/default.nix
index eef8a5e41fd2..f379e58ba16b 100644
--- a/pkgs/development/tools/rust/bindgen/default.nix
+++ b/pkgs/development/tools/rust/bindgen/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform, clang, llvmPackages, rustfmt, writeScriptBin
+{ lib, fetchFromGitHub, rustPlatform, clang, llvmPackages, rustfmt, writeScriptBin
 , runtimeShell
 , bash
 }:
diff --git a/pkgs/development/tools/rust/cargo-binutils/default.nix b/pkgs/development/tools/rust/cargo-binutils/default.nix
index b79611ff5ecb..8b40d9b686d9 100644
--- a/pkgs/development/tools/rust/cargo-binutils/default.nix
+++ b/pkgs/development/tools/rust/cargo-binutils/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, rustPlatform, runCommand }:
+{ lib, fetchFromGitHub, rustPlatform, runCommand }:
 
 rustPlatform.buildRustPackage rec {
   pname = "cargo-binutils";
diff --git a/pkgs/development/tools/rust/cargo-embed/default.nix b/pkgs/development/tools/rust/cargo-embed/default.nix
index e4c5d8ab48c7..989885e99a74 100644
--- a/pkgs/development/tools/rust/cargo-embed/default.nix
+++ b/pkgs/development/tools/rust/cargo-embed/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib
+{ lib
 , rustPlatform, fetchFromGitHub
 , libusb1, pkg-config, rustfmt }:
 
diff --git a/pkgs/development/tools/rust/cargo-flash/default.nix b/pkgs/development/tools/rust/cargo-flash/default.nix
index dbd79f179aa3..39b56c2d656d 100644
--- a/pkgs/development/tools/rust/cargo-flash/default.nix
+++ b/pkgs/development/tools/rust/cargo-flash/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib
+{ lib
 , rustPlatform, fetchFromGitHub
 , libusb1, pkg-config, rustfmt }:
 
diff --git a/pkgs/development/tools/rust/cargo-fuzz/default.nix b/pkgs/development/tools/rust/cargo-fuzz/default.nix
index 904ba6efb52b..569c8f88da2f 100644
--- a/pkgs/development/tools/rust/cargo-fuzz/default.nix
+++ b/pkgs/development/tools/rust/cargo-fuzz/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage rec {
   pname = "cargo-fuzz";
diff --git a/pkgs/development/tools/rust/cargo-readme/default.nix b/pkgs/development/tools/rust/cargo-readme/default.nix
index ae638cac8a9a..358c58bef4d4 100644
--- a/pkgs/development/tools/rust/cargo-readme/default.nix
+++ b/pkgs/development/tools/rust/cargo-readme/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, rustPlatform, fetchFromGitHub, fetchpatch }:
+{ lib, rustPlatform, fetchFromGitHub, fetchpatch }:
 
 rustPlatform.buildRustPackage rec {
   pname = "cargo-readme";
diff --git a/pkgs/development/tools/rust/cargo-sweep/default.nix b/pkgs/development/tools/rust/cargo-sweep/default.nix
index 210449a72300..f20bdb9cc174 100644
--- a/pkgs/development/tools/rust/cargo-sweep/default.nix
+++ b/pkgs/development/tools/rust/cargo-sweep/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, rustPlatform, fetchFromGitHub }:
+{ lib, rustPlatform, fetchFromGitHub }:
 
 rustPlatform.buildRustPackage rec {
   pname = "cargo-sweep";
diff --git a/pkgs/development/tools/rust/cargo-sync-readme/default.nix b/pkgs/development/tools/rust/cargo-sync-readme/default.nix
index 45ea6c430d15..54f21ab46270 100644
--- a/pkgs/development/tools/rust/cargo-sync-readme/default.nix
+++ b/pkgs/development/tools/rust/cargo-sync-readme/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, rustPlatform, fetchFromGitHub }:
+{ lib, rustPlatform, fetchFromGitHub }:
 
 rustPlatform.buildRustPackage rec {
   pname = "cargo-sync-readme";
diff --git a/pkgs/development/tools/rust/cargo-wipe/default.nix b/pkgs/development/tools/rust/cargo-wipe/default.nix
index 6c73b245e047..c4c079c523b1 100644
--- a/pkgs/development/tools/rust/cargo-wipe/default.nix
+++ b/pkgs/development/tools/rust/cargo-wipe/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , rustPlatform
 , fetchFromGitHub
 , nix-update-script
diff --git a/pkgs/development/tools/rust/cargo-xbuild/default.nix b/pkgs/development/tools/rust/cargo-xbuild/default.nix
index 2e800402c1dd..8aa701779bc0 100644
--- a/pkgs/development/tools/rust/cargo-xbuild/default.nix
+++ b/pkgs/development/tools/rust/cargo-xbuild/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage rec {
   pname = "cargo-xbuild";
diff --git a/pkgs/development/tools/rust/svd2rust/default.nix b/pkgs/development/tools/rust/svd2rust/default.nix
index 97da80562905..6ec06fffe21f 100644
--- a/pkgs/development/tools/rust/svd2rust/default.nix
+++ b/pkgs/development/tools/rust/svd2rust/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 with rustPlatform;
 
diff --git a/pkgs/development/tools/sourcetrail/jedi.nix b/pkgs/development/tools/sourcetrail/jedi.nix
index fa25604f9fc5..2e1ca55dad3f 100644
--- a/pkgs/development/tools/sourcetrail/jedi.nix
+++ b/pkgs/development/tools/sourcetrail/jedi.nix
@@ -1,6 +1,6 @@
 # Taken from a past commit of nixpkgs
 
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest, glibcLocales, tox, pytestcov, parso }:
+{ lib, buildPythonPackage, fetchPypi, pytest, glibcLocales, tox, pytestcov, parso }:
 
 buildPythonPackage rec {
   pname = "jedi";
diff --git a/pkgs/development/tools/summon/default.nix b/pkgs/development/tools/summon/default.nix
index 5d851adc5abc..5c811aaf2391 100644
--- a/pkgs/development/tools/summon/default.nix
+++ b/pkgs/development/tools/summon/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildGoModule, fetchFromGitHub, lib, patchResolver ? true }:
+{ buildGoModule, fetchFromGitHub, lib, patchResolver ? true }:
 
 with lib;
 
diff --git a/pkgs/development/tools/systemfd/default.nix b/pkgs/development/tools/systemfd/default.nix
index c25f0491c672..a1c93f46dcb7 100644
--- a/pkgs/development/tools/systemfd/default.nix
+++ b/pkgs/development/tools/systemfd/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchgit, darwin, buildPlatform
+{ lib, fetchgit, darwin, buildPlatform
 , buildRustCrate, buildRustCrateHelpers, defaultCrateOverrides }:
 
 ((import ./Cargo.nix {
diff --git a/pkgs/development/tools/textql/default.nix b/pkgs/development/tools/textql/default.nix
index 7dc899c4fc46..7b80192a75e7 100644
--- a/pkgs/development/tools/textql/default.nix
+++ b/pkgs/development/tools/textql/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, sqlite }:
+{ lib, buildGoPackage, fetchFromGitHub, sqlite }:
 
 buildGoPackage rec {
   pname = "textql";
diff --git a/pkgs/development/tools/unityhub/default.nix b/pkgs/development/tools/unityhub/default.nix
index 9a2c1d72caa3..dc2f80221172 100644
--- a/pkgs/development/tools/unityhub/default.nix
+++ b/pkgs/development/tools/unityhub/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, appimageTools, gsettings-desktop-schemas, gtk3 }:
+{ lib, fetchurl, appimageTools, gsettings-desktop-schemas, gtk3 }:
 
 let
   version = "2.3.2";
diff --git a/pkgs/development/tools/vcstool/default.nix b/pkgs/development/tools/vcstool/default.nix
index 65f91b3324f5..f37b17057e59 100644
--- a/pkgs/development/tools/vcstool/default.nix
+++ b/pkgs/development/tools/vcstool/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages
+{ lib, python3Packages
 , git, breezy, subversion }:
 
 with python3Packages;
diff --git a/pkgs/development/tools/vend/default.nix b/pkgs/development/tools/vend/default.nix
index cfadf694320e..0b037a9068c1 100644
--- a/pkgs/development/tools/vend/default.nix
+++ b/pkgs/development/tools/vend/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "vend";
diff --git a/pkgs/development/tools/vultr-cli/default.nix b/pkgs/development/tools/vultr-cli/default.nix
index 23dda32b7232..505023f3fddc 100644
--- a/pkgs/development/tools/vultr-cli/default.nix
+++ b/pkgs/development/tools/vultr-cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "vultr-cli";
diff --git a/pkgs/development/tools/vultr/default.nix b/pkgs/development/tools/vultr/default.nix
index b9ca0febf971..1f101882b5b9 100644
--- a/pkgs/development/tools/vultr/default.nix
+++ b/pkgs/development/tools/vultr/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "vultr";
diff --git a/pkgs/development/tools/winpdb/default.nix b/pkgs/development/tools/winpdb/default.nix
index b7eaabe8693f..b5e0701c136e 100644
--- a/pkgs/development/tools/winpdb/default.nix
+++ b/pkgs/development/tools/winpdb/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, pythonPackages, makeDesktopItem }:
+{ lib, fetchurl, pythonPackages, makeDesktopItem }:
 
 pythonPackages.buildPythonApplication rec {
   name = "winpdb-1.4.8";
diff --git a/pkgs/development/tools/wllvm/default.nix b/pkgs/development/tools/wllvm/default.nix
index a3702f2e3e65..85dbc4f731a1 100644
--- a/pkgs/development/tools/wllvm/default.nix
+++ b/pkgs/development/tools/wllvm/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages }:
+{ lib, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   version = "1.2.8";
diff --git a/pkgs/development/tools/ws/default.nix b/pkgs/development/tools/ws/default.nix
index 3026289fec1e..bef8eb906cf1 100644
--- a/pkgs/development/tools/ws/default.nix
+++ b/pkgs/development/tools/ws/default.nix
@@ -1,5 +1,5 @@
 # This file was generated by https://github.com/kamilchm/go2nix v1.2.1
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   pname = "ws";
diff --git a/pkgs/development/tools/yaml2json/default.nix b/pkgs/development/tools/yaml2json/default.nix
index d707caaec5a7..77f884b82b6a 100644
--- a/pkgs/development/tools/yaml2json/default.nix
+++ b/pkgs/development/tools/yaml2json/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 
 buildGoPackage {
diff --git a/pkgs/development/tools/yj/default.nix b/pkgs/development/tools/yj/default.nix
index 68ecaf6479eb..303f325dec18 100644
--- a/pkgs/development/tools/yj/default.nix
+++ b/pkgs/development/tools/yj/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "yj";
diff --git a/pkgs/development/web/shopify-themekit/default.nix b/pkgs/development/web/shopify-themekit/default.nix
index 60a3d330ab82..bf0a8c6d8161 100644
--- a/pkgs/development/web/shopify-themekit/default.nix
+++ b/pkgs/development/web/shopify-themekit/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "shopify-themekit";
diff --git a/pkgs/development/web/wml/default.nix b/pkgs/development/web/wml/default.nix
index 2b882ccc8418..a6ffe6e84e3f 100644
--- a/pkgs/development/web/wml/default.nix
+++ b/pkgs/development/web/wml/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, perlPackages, ncurses, lynx, makeWrapper }:
+{ lib, fetchurl, perlPackages, ncurses, lynx, makeWrapper }:
 
 perlPackages.buildPerlPackage {
   pname = "wml";
diff --git a/pkgs/games/20kly/default.nix b/pkgs/games/20kly/default.nix
index e8778d7bebcf..092e0e4eac27 100644
--- a/pkgs/games/20kly/default.nix
+++ b/pkgs/games/20kly/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchurl
 , python }:
 
diff --git a/pkgs/games/boohu/default.nix b/pkgs/games/boohu/default.nix
index 9b46420d5fff..831893536453 100644
--- a/pkgs/games/boohu/default.nix
+++ b/pkgs/games/boohu/default.nix
@@ -1,4 +1,4 @@
-{lib, stdenv, fetchurl, buildGoPackage}:
+{lib, fetchurl, buildGoPackage}:
 
 buildGoPackage rec {
 
diff --git a/pkgs/games/chessx/default.nix b/pkgs/games/chessx/default.nix
index f63f6362558e..fb7c7fddf095 100644
--- a/pkgs/games/chessx/default.nix
+++ b/pkgs/games/chessx/default.nix
@@ -1,5 +1,5 @@
 { mkDerivation
-, lib, stdenv
+, lib
 , pkg-config
 , zlib
 , qtbase
diff --git a/pkgs/games/cockatrice/default.nix b/pkgs/games/cockatrice/default.nix
index d47e0d5521db..a657913aad76 100644
--- a/pkgs/games/cockatrice/default.nix
+++ b/pkgs/games/cockatrice/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, mkDerivation, cmake, protobuf
+{ lib, fetchFromGitHub, mkDerivation, cmake, protobuf
 , qtbase, qtmultimedia, qttools, qtwebsockets, wrapQtAppsHook
 }:
 
diff --git a/pkgs/games/eidolon/default.nix b/pkgs/games/eidolon/default.nix
index 3192976b0f62..dcb72d53b328 100644
--- a/pkgs/games/eidolon/default.nix
+++ b/pkgs/games/eidolon/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit, rustPlatform, pkg-config, openssl }:
+{ lib, fetchgit, rustPlatform, pkg-config, openssl }:
 
 rustPlatform.buildRustPackage rec {
   pname = "eidolon";
diff --git a/pkgs/games/endgame-singularity/default.nix b/pkgs/games/endgame-singularity/default.nix
index f220a85e0eb6..d6b153018723 100644
--- a/pkgs/games/endgame-singularity/default.nix
+++ b/pkgs/games/endgame-singularity/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchurl
 , fetchFromGitHub
 , unzip
diff --git a/pkgs/games/enyo-doom/default.nix b/pkgs/games/enyo-doom/default.nix
index 10cce9f3bf81..eeb4086f924e 100644
--- a/pkgs/games/enyo-doom/default.nix
+++ b/pkgs/games/enyo-doom/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchFromGitLab, cmake, qtbase }:
+{ mkDerivation, lib, fetchFromGitLab, cmake, qtbase }:
 
 mkDerivation rec {
   pname = "enyo-doom";
diff --git a/pkgs/games/factorio/mods.nix b/pkgs/games/factorio/mods.nix
index 8d9976689cc4..7327b9e22870 100644
--- a/pkgs/games/factorio/mods.nix
+++ b/pkgs/games/factorio/mods.nix
@@ -2,7 +2,7 @@
 # mods. It will eventually be replaced by a nixos-channel that will provide
 # derivations for most or all of the mods tracked through the official mod
 # manager site.
-{ lib, stdenv, fetchurl
+{ lib, fetchurl
 , factorio-utils
 , allRecommendedMods ? true
 , allOptionalMods ? false
diff --git a/pkgs/games/frogatto/default.nix b/pkgs/games/frogatto/default.nix
index fb09847908da..69d5282aedca 100644
--- a/pkgs/games/frogatto/default.nix
+++ b/pkgs/games/frogatto/default.nix
@@ -1,4 +1,4 @@
-{ buildEnv, lib, stdenv, callPackage, makeWrapper, makeDesktopItem }:
+{ buildEnv, lib, callPackage, makeWrapper, makeDesktopItem }:
 
 let
   description = "Action-adventure game, starring a certain quixotic frog";
diff --git a/pkgs/games/frozen-bubble/default.nix b/pkgs/games/frozen-bubble/default.nix
index d1521dae3c4e..6883acb6014c 100644
--- a/pkgs/games/frozen-bubble/default.nix
+++ b/pkgs/games/frozen-bubble/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, perlPackages, pkg-config, SDL, SDL_mixer, SDL_Pango, glib }:
+{ lib, fetchurl, perlPackages, pkg-config, SDL, SDL_mixer, SDL_Pango, glib }:
 
 perlPackages.buildPerlModule {
   pname = "frozen-bubble";
diff --git a/pkgs/games/gscrabble/default.nix b/pkgs/games/gscrabble/default.nix
index 7d63510aa991..74411d63d3eb 100644
--- a/pkgs/games/gscrabble/default.nix
+++ b/pkgs/games/gscrabble/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonApplication, fetchFromGitHub
+{ lib, buildPythonApplication, fetchFromGitHub
 , gtk3, wrapGAppsHook, gst_all_1, gobject-introspection
 , python3Packages, gnome3 }:
 
diff --git a/pkgs/games/gshogi/default.nix b/pkgs/games/gshogi/default.nix
index 5ed4bf5a3763..c3479f6758af 100644
--- a/pkgs/games/gshogi/default.nix
+++ b/pkgs/games/gshogi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonApplication, fetchFromGitHub
+{ lib, buildPythonApplication, fetchFromGitHub
 , gtk3, gobject-introspection
 , wrapGAppsHook, python3Packages }:
 
diff --git a/pkgs/games/harmonist/default.nix b/pkgs/games/harmonist/default.nix
index 0705da6bfe94..4609f7d732cc 100644
--- a/pkgs/games/harmonist/default.nix
+++ b/pkgs/games/harmonist/default.nix
@@ -1,4 +1,4 @@
-{lib, stdenv, fetchurl, buildGoPackage}:
+{lib, fetchurl, buildGoPackage}:
 
 buildGoPackage rec {
 
diff --git a/pkgs/games/lunar-client/default.nix b/pkgs/games/lunar-client/default.nix
index f5c0e3faf77a..0635ab8aed83 100644
--- a/pkgs/games/lunar-client/default.nix
+++ b/pkgs/games/lunar-client/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, appimageTools, lib, fetchurl, makeDesktopItem }:
+{ appimageTools, lib, fetchurl, makeDesktopItem }:
 let
   name = "lunar-client";
   version = "2.4.0";
diff --git a/pkgs/games/multimc/default.nix b/pkgs/games/multimc/default.nix
index 81fc1b98f366..5a1f42ee130b 100644
--- a/pkgs/games/multimc/default.nix
+++ b/pkgs/games/multimc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, cmake, jdk8, zlib, file, makeWrapper, xorg, libpulseaudio, qtbase, libGL }:
+{ lib, mkDerivation, fetchFromGitHub, cmake, jdk8, zlib, file, makeWrapper, xorg, libpulseaudio, qtbase, libGL }:
 
 let
   jdk = jdk8;
diff --git a/pkgs/games/openra/common.nix b/pkgs/games/openra/common.nix
index 306c5de3b43a..41c903e10116 100644
--- a/pkgs/games/openra/common.nix
+++ b/pkgs/games/openra/common.nix
@@ -1,7 +1,7 @@
 /*  The reusable code, and package attributes, between OpenRA engine packages (engine.nix)
     and out-of-tree mod packages (mod.nix).
 */
-{ lib, stdenv, makeSetupHook, curl, unzip, dos2unix, pkg-config, makeWrapper
+{ lib, makeSetupHook, curl, unzip, dos2unix, pkg-config, makeWrapper
 , lua, mono, dotnetPackages, python
 , libGL, freetype, openal, SDL2
 , zenity
diff --git a/pkgs/games/pokerth/default.nix b/pkgs/games/pokerth/default.nix
index 56f0d5a47f2c..59555a8ac240 100644
--- a/pkgs/games/pokerth/default.nix
+++ b/pkgs/games/pokerth/default.nix
@@ -1,4 +1,4 @@
-{ lib, mkDerivation, stdenv, fetchFromGitHub, runCommand, fetchpatch, patchutils, qmake, qtbase
+{ lib, mkDerivation, fetchFromGitHub, runCommand, fetchpatch, patchutils, qmake, qtbase
 , SDL, SDL_mixer, boost, curl, gsasl, libgcrypt, libircclient, protobuf, sqlite
 , wrapQtAppsHook
 , tinyxml2, target ? "client" }:
diff --git a/pkgs/games/portmod/default.nix b/pkgs/games/portmod/default.nix
index 07451b8dc2a4..ef535991c23b 100644
--- a/pkgs/games/portmod/default.nix
+++ b/pkgs/games/portmod/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, callPackage, python3Packages, fetchFromGitLab, cacert,
+{ lib, callPackage, python3Packages, fetchFromGitLab, cacert,
   rustPlatform, bubblewrap, git, perlPackages, imagemagick7, fetchurl, fetchzip,
   jre, makeWrapper, tr-patcher, tes3cmd }:
 
diff --git a/pkgs/games/pro-office-calculator/default.nix b/pkgs/games/pro-office-calculator/default.nix
index dbe2db363ea1..381a6e8742b0 100644
--- a/pkgs/games/pro-office-calculator/default.nix
+++ b/pkgs/games/pro-office-calculator/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchFromGitHub, tinyxml-2, cmake, qtbase, qtmultimedia }:
+{ mkDerivation, lib, fetchFromGitHub, tinyxml-2, cmake, qtbase, qtmultimedia }:
 mkDerivation rec {
   version = "1.0.13";
   pname = "pro-office-calculator";
diff --git a/pkgs/games/pysolfc/default.nix b/pkgs/games/pysolfc/default.nix
index c765a1cbdf5b..925532bbbf53 100644
--- a/pkgs/games/pysolfc/default.nix
+++ b/pkgs/games/pysolfc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchzip, buildPythonApplication, python3Packages
+{ lib, fetchzip, buildPythonApplication, python3Packages
   , desktop-file-utils, freecell-solver }:
 
 buildPythonApplication rec {
diff --git a/pkgs/games/the-butterfly-effect/default.nix b/pkgs/games/the-butterfly-effect/default.nix
index c87d1bea1c73..f5330485eddc 100644
--- a/pkgs/games/the-butterfly-effect/default.nix
+++ b/pkgs/games/the-butterfly-effect/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, qt5, box2d, which, cmake, gettext }:
+{ lib, mkDerivation, fetchFromGitHub, qt5, box2d, which, cmake, gettext }:
 
 mkDerivation rec {
   pname = "tbe";
diff --git a/pkgs/games/wyvern/default.nix b/pkgs/games/wyvern/default.nix
index 5a6bc34fea5e..f99faa282fdc 100644
--- a/pkgs/games/wyvern/default.nix
+++ b/pkgs/games/wyvern/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchgit
 , rustPlatform
 , unzip
diff --git a/pkgs/misc/doge/default.nix b/pkgs/misc/doge/default.nix
index 8334444ec4c9..911917e6d2fa 100644
--- a/pkgs/misc/doge/default.nix
+++ b/pkgs/misc/doge/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv , python3Packages }:
+{ lib, python3Packages }:
 
 python3Packages.buildPythonPackage rec {
   pname = "doge";
diff --git a/pkgs/misc/drivers/steamcontroller/default.nix b/pkgs/misc/drivers/steamcontroller/default.nix
index 77a2e03d1618..db5c8e5d903b 100644
--- a/pkgs/misc/drivers/steamcontroller/default.nix
+++ b/pkgs/misc/drivers/steamcontroller/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, python3Packages, libusb1, linuxHeaders
+{ lib, fetchFromGitHub, python3Packages, libusb1, linuxHeaders
 , GyroplotSupport ? false
 }:
 
diff --git a/pkgs/misc/emulators/citra/default.nix b/pkgs/misc/emulators/citra/default.nix
index d092a8786838..e1a31d208e48 100644
--- a/pkgs/misc/emulators/citra/default.nix
+++ b/pkgs/misc/emulators/citra/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, mkDerivation, lib, fetchgit, cmake, SDL2, qtbase, qtmultimedia, boost }:
+{ mkDerivation, lib, fetchgit, cmake, SDL2, qtbase, qtmultimedia, boost }:
 
 mkDerivation {
   pname = "citra";
diff --git a/pkgs/misc/emulators/firebird-emu/default.nix b/pkgs/misc/emulators/firebird-emu/default.nix
index 236eff8610cc..c766df9e3c03 100644
--- a/pkgs/misc/emulators/firebird-emu/default.nix
+++ b/pkgs/misc/emulators/firebird-emu/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchFromGitHub, qmake, qtbase, qtdeclarative }:
+{ mkDerivation, lib, fetchFromGitHub, qmake, qtbase, qtdeclarative }:
 
 mkDerivation rec {
   pname = "firebird-emu";
diff --git a/pkgs/misc/emulators/melonDS/default.nix b/pkgs/misc/emulators/melonDS/default.nix
index dbf658b8fcea..b028701fe110 100644
--- a/pkgs/misc/emulators/melonDS/default.nix
+++ b/pkgs/misc/emulators/melonDS/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , mkDerivation
 , cmake
diff --git a/pkgs/misc/emulators/ruffle/default.nix b/pkgs/misc/emulators/ruffle/default.nix
index 475e54076fc2..9e1f986341f7 100644
--- a/pkgs/misc/emulators/ruffle/default.nix
+++ b/pkgs/misc/emulators/ruffle/default.nix
@@ -5,7 +5,7 @@
 , pkg-config
 , python3
 , rustPlatform
-, lib, stdenv
+, lib
 , wayland
 , xorg
 , vulkan-loader
diff --git a/pkgs/misc/emulators/wine/staging.nix b/pkgs/misc/emulators/wine/staging.nix
index 24da1d86bbfd..abfc4f832a3b 100644
--- a/pkgs/misc/emulators/wine/staging.nix
+++ b/pkgs/misc/emulators/wine/staging.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, callPackage, wineUnstable }:
+{ lib, callPackage, wineUnstable }:
 
 with callPackage ./util.nix {};
 
diff --git a/pkgs/misc/emulators/yabause/default.nix b/pkgs/misc/emulators/yabause/default.nix
index 43f077227dbf..17b7b563c15f 100644
--- a/pkgs/misc/emulators/yabause/default.nix
+++ b/pkgs/misc/emulators/yabause/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchurl, cmake, pkg-config, qtbase, qt5, libGLU, libGL
+{ mkDerivation, lib, fetchurl, cmake, pkg-config, qtbase, qt5, libGLU, libGL
 , freeglut ? null, openal ? null, SDL2 ? null }:
 
 mkDerivation rec {
diff --git a/pkgs/misc/lilypond/with-fonts.nix b/pkgs/misc/lilypond/with-fonts.nix
index c4de45421f24..2f3a95a33022 100644
--- a/pkgs/misc/lilypond/with-fonts.nix
+++ b/pkgs/misc/lilypond/with-fonts.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, lndir, symlinkJoin, makeWrapper
+{ lib, lndir, symlinkJoin, makeWrapper
 , lilypond, openlilylib-fonts
 }:
 
diff --git a/pkgs/misc/logging/beats/6.x.nix b/pkgs/misc/logging/beats/6.x.nix
index 1be14ecec9b8..ce80b174d327 100644
--- a/pkgs/misc/logging/beats/6.x.nix
+++ b/pkgs/misc/logging/beats/6.x.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, elk6Version, buildGoPackage, libpcap, systemd }:
+{ lib, fetchFromGitHub, elk6Version, buildGoPackage, libpcap, systemd }:
 
 let beat = package : extraArgs : buildGoPackage (rec {
       name = "${package}-${version}";
diff --git a/pkgs/misc/logging/beats/7.x.nix b/pkgs/misc/logging/beats/7.x.nix
index d7416731e636..43ea85508c69 100644
--- a/pkgs/misc/logging/beats/7.x.nix
+++ b/pkgs/misc/logging/beats/7.x.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, elk7Version, buildGoPackage, libpcap, systemd }:
+{ lib, fetchFromGitHub, elk7Version, buildGoPackage, libpcap, systemd }:
 
 let beat = package : extraArgs : buildGoPackage (rec {
       name = "${package}-${version}";
diff --git a/pkgs/misc/vscode-extensions/cpptools/default.nix b/pkgs/misc/vscode-extensions/cpptools/default.nix
index bb547b3d34d0..188da860530a 100644
--- a/pkgs/misc/vscode-extensions/cpptools/default.nix
+++ b/pkgs/misc/vscode-extensions/cpptools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, vscode-utils
+{ lib, vscode-utils
 , fetchurl, unzip
 , mono, writeScript, runtimeShell
 , jq, clang-tools
diff --git a/pkgs/misc/vscode-extensions/default.nix b/pkgs/misc/vscode-extensions/default.nix
index f561755fc4bd..b894eb7fa4dd 100644
--- a/pkgs/misc/vscode-extensions/default.nix
+++ b/pkgs/misc/vscode-extensions/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, config, lib, callPackage, vscode-utils, nodePackages,llvmPackages_8, llvmPackages_latest }:
+{ config, lib, callPackage, vscode-utils, nodePackages,llvmPackages_8, llvmPackages_latest }:
 
 let
   inherit (vscode-utils) buildVscodeMarketplaceExtension;
diff --git a/pkgs/misc/vscode-extensions/remote-ssh/default.nix b/pkgs/misc/vscode-extensions/remote-ssh/default.nix
index 82924f369ae7..746bb4608ab8 100644
--- a/pkgs/misc/vscode-extensions/remote-ssh/default.nix
+++ b/pkgs/misc/vscode-extensions/remote-ssh/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , vscode-utils
 , useLocalExtensions ? false}:
 # Note that useLocalExtensions requires that vscode-server is not running
diff --git a/pkgs/misc/vscode-extensions/rust-analyzer/default.nix b/pkgs/misc/vscode-extensions/rust-analyzer/default.nix
index d19027fa5762..0136bf4e5b1b 100644
--- a/pkgs/misc/vscode-extensions/rust-analyzer/default.nix
+++ b/pkgs/misc/vscode-extensions/rust-analyzer/default.nix
@@ -1,5 +1,5 @@
 # Update script: pkgs/development/tools/rust/rust-analyzer/update.sh
-{ lib, stdenv, vscode-utils, jq, rust-analyzer, nodePackages
+{ lib, vscode-utils, jq, rust-analyzer, nodePackages
 , setDefaultServerPath ? true
 }:
 
diff --git a/pkgs/misc/vscode-extensions/wakatime/default.nix b/pkgs/misc/vscode-extensions/wakatime/default.nix
index 336cd059f57a..86453b960cba 100644
--- a/pkgs/misc/vscode-extensions/wakatime/default.nix
+++ b/pkgs/misc/vscode-extensions/wakatime/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , wakatime, vscode-utils }:
 
 let
diff --git a/pkgs/os-specific/darwin/apple-source-releases/CarbonHeaders/default.nix b/pkgs/os-specific/darwin/apple-source-releases/CarbonHeaders/default.nix
index 9afd4b475de5..b53c5985a21c 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/CarbonHeaders/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/CarbonHeaders/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation }:
+{ lib, appleDerivation }:
 
 appleDerivation {
   dontBuild = true;
diff --git a/pkgs/os-specific/darwin/apple-source-releases/CommonCrypto/default.nix b/pkgs/os-specific/darwin/apple-source-releases/CommonCrypto/default.nix
index 3e5399dbb355..609cd579f9f6 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/CommonCrypto/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/CommonCrypto/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation }:
+{ lib, appleDerivation }:
 
 appleDerivation {
   installPhase = ''
diff --git a/pkgs/os-specific/darwin/apple-source-releases/Csu/default.nix b/pkgs/os-specific/darwin/apple-source-releases/Csu/default.nix
index 2f6c8319b1cf..e3b3179d4a3b 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/Csu/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/Csu/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation }:
+{ lib, appleDerivation }:
 
 appleDerivation {
   prePatch = ''
diff --git a/pkgs/os-specific/darwin/apple-source-releases/IOKit/default.nix b/pkgs/os-specific/darwin/apple-source-releases/IOKit/default.nix
index cb54212f2176..0ba61ccb4915 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/IOKit/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/IOKit/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation, IOKitSrcs, xnu, darwin-stubs }:
+{ lib, appleDerivation, IOKitSrcs, xnu, darwin-stubs }:
 
 # Someday it'll make sense to split these out into their own packages, but today is not that day.
 appleDerivation {
diff --git a/pkgs/os-specific/darwin/apple-source-releases/Librpcsvc/default.nix b/pkgs/os-specific/darwin/apple-source-releases/Librpcsvc/default.nix
index 7f93a87837a2..1bf6396d47fd 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/Librpcsvc/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/Librpcsvc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation, developer_cmds }:
+{ lib, appleDerivation, developer_cmds }:
 
 appleDerivation {
   buildInputs = [ developer_cmds ];
diff --git a/pkgs/os-specific/darwin/apple-source-releases/Libsystem/default.nix b/pkgs/os-specific/darwin/apple-source-releases/Libsystem/default.nix
index a5508b5ec12f..ad3f5dea9757 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/Libsystem/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/Libsystem/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation, cpio, xnu, Libc, Libm, libdispatch, cctools, Libinfo
+{ lib, appleDerivation, cpio, xnu, Libc, Libm, libdispatch, cctools, Libinfo
 , dyld, Csu, architecture, libclosure, CarbonHeaders, ncurses, CommonCrypto
 , copyfile, removefile, libresolv, Libnotify, libplatform, libpthread
 , mDNSResponder, launchd, libutil, hfs, darling, darwin-stubs }:
diff --git a/pkgs/os-specific/darwin/apple-source-releases/adv_cmds/boot.nix b/pkgs/os-specific/darwin/apple-source-releases/adv_cmds/boot.nix
index 4f719ef84634..4855c532acb7 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/adv_cmds/boot.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/adv_cmds/boot.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation, fetchzip, bsdmake, perl, flex, yacc
+{ lib, appleDerivation, fetchzip, bsdmake, perl, flex, yacc
 }:
 
 # this derivation sucks
diff --git a/pkgs/os-specific/darwin/apple-source-releases/adv_cmds/default.nix b/pkgs/os-specific/darwin/apple-source-releases/adv_cmds/default.nix
index 614bdf570f3f..6e659df4d620 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/adv_cmds/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/adv_cmds/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation, xcbuild, ncurses, libutil }:
+{ lib, appleDerivation, xcbuild, ncurses, libutil }:
 
 appleDerivation {
   # We can't just run the root build, because https://github.com/facebook/xcbuild/issues/264
diff --git a/pkgs/os-specific/darwin/apple-source-releases/architecture/default.nix b/pkgs/os-specific/darwin/apple-source-releases/architecture/default.nix
index f7503dbb953c..5a3b17102161 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/architecture/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/architecture/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation }:
+{ lib, appleDerivation }:
 
 appleDerivation {
   dontBuild = true;
diff --git a/pkgs/os-specific/darwin/apple-source-releases/basic_cmds/default.nix b/pkgs/os-specific/darwin/apple-source-releases/basic_cmds/default.nix
index 8cff145661f6..7d011d2d8cc8 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/basic_cmds/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/basic_cmds/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation, xcbuildHook }:
+{ lib, appleDerivation, xcbuildHook }:
 
 appleDerivation {
   nativeBuildInputs = [ xcbuildHook ];
diff --git a/pkgs/os-specific/darwin/apple-source-releases/bootstrap_cmds/default.nix b/pkgs/os-specific/darwin/apple-source-releases/bootstrap_cmds/default.nix
index 5819101e10a7..27a7f7b3e7c5 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/bootstrap_cmds/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/bootstrap_cmds/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation, yacc, flex }:
+{ lib, appleDerivation, yacc, flex }:
 
 appleDerivation {
   nativeBuildInputs = [ yacc flex ];
diff --git a/pkgs/os-specific/darwin/apple-source-releases/bsdmake/default.nix b/pkgs/os-specific/darwin/apple-source-releases/bsdmake/default.nix
index 5a5a603eae80..6f666019c3b3 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/bsdmake/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/bsdmake/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation, makeWrapper }:
+{ lib, appleDerivation, makeWrapper }:
 
 appleDerivation {
   nativeBuildInputs = [ makeWrapper ];
diff --git a/pkgs/os-specific/darwin/apple-source-releases/developer_cmds/default.nix b/pkgs/os-specific/darwin/apple-source-releases/developer_cmds/default.nix
index db57537bacbf..77de079e2f0f 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/developer_cmds/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/developer_cmds/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation, xcbuildHook, llvmPackages }:
+{ lib, appleDerivation, xcbuildHook, llvmPackages }:
 
 appleDerivation {
   nativeBuildInputs = [ xcbuildHook ];
diff --git a/pkgs/os-specific/darwin/apple-source-releases/diskdev_cmds/default.nix b/pkgs/os-specific/darwin/apple-source-releases/diskdev_cmds/default.nix
index e46e826053fb..1daa49296104 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/diskdev_cmds/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/diskdev_cmds/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation, xcbuildHook
+{ lib, appleDerivation, xcbuildHook
 , Libc, xnu, libutil }:
 
 appleDerivation {
diff --git a/pkgs/os-specific/darwin/apple-source-releases/dyld/default.nix b/pkgs/os-specific/darwin/apple-source-releases/dyld/default.nix
index 4a72ea337ebf..01d44d22f5ef 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/dyld/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/dyld/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation }:
+{ lib, appleDerivation }:
 
 appleDerivation {
   installPhase = ''
diff --git a/pkgs/os-specific/darwin/apple-source-releases/file_cmds/default.nix b/pkgs/os-specific/darwin/apple-source-releases/file_cmds/default.nix
index 407117f1dbd7..258d9785e704 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/file_cmds/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/file_cmds/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation, xcbuildHook, zlib, bzip2, lzma, ncurses, libutil }:
+{ lib, appleDerivation, xcbuildHook, zlib, bzip2, lzma, ncurses, libutil }:
 
 appleDerivation {
   nativeBuildInputs = [ xcbuildHook ];
diff --git a/pkgs/os-specific/darwin/apple-source-releases/libpthread/default.nix b/pkgs/os-specific/darwin/apple-source-releases/libpthread/default.nix
index ceb4b18df177..d9a9beaccfc8 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/libpthread/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/libpthread/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation, libdispatch, xnu }:
+{ lib, appleDerivation, libdispatch, xnu }:
 
 appleDerivation {
   propagatedBuildInputs = [ libdispatch xnu ];
diff --git a/pkgs/os-specific/darwin/apple-source-releases/libunwind/default.nix b/pkgs/os-specific/darwin/apple-source-releases/libunwind/default.nix
index 24986e288524..5021d3cd7fec 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/libunwind/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/libunwind/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation }:
+{ lib, appleDerivation }:
 
 appleDerivation {
   buildPhase = ":";
diff --git a/pkgs/os-specific/darwin/apple-source-releases/network_cmds/default.nix b/pkgs/os-specific/darwin/apple-source-releases/network_cmds/default.nix
index f216a820dd41..dd3cf0309526 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/network_cmds/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/network_cmds/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation, xcbuildHook
+{ lib, appleDerivation, xcbuildHook
 , openssl_1_0_2, Librpcsvc, xnu, libpcap, developer_cmds }:
 
 appleDerivation {
diff --git a/pkgs/os-specific/darwin/apple-source-releases/shell_cmds/default.nix b/pkgs/os-specific/darwin/apple-source-releases/shell_cmds/default.nix
index 771dd41b5754..e2e13a168f04 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/shell_cmds/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/shell_cmds/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation, xcbuildHook }:
+{ lib, appleDerivation, xcbuildHook }:
 
 appleDerivation {
   nativeBuildInputs = [ xcbuildHook ];
diff --git a/pkgs/os-specific/darwin/apple-source-releases/text_cmds/default.nix b/pkgs/os-specific/darwin/apple-source-releases/text_cmds/default.nix
index d5dca4a30354..3f0c91db91ca 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/text_cmds/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/text_cmds/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation, xcbuildHook, ncurses, bzip2, zlib, lzma }:
+{ lib, appleDerivation, xcbuildHook, ncurses, bzip2, zlib, lzma }:
 
 appleDerivation {
   nativeBuildInputs = [ xcbuildHook ];
diff --git a/pkgs/os-specific/darwin/stubs/default.nix b/pkgs/os-specific/darwin/stubs/default.nix
index e21f00beb5aa..862305a069d6 100644
--- a/pkgs/os-specific/darwin/stubs/default.nix
+++ b/pkgs/os-specific/darwin/stubs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, writeScriptBin, runtimeShell }:
+{ lib, writeScriptBin, runtimeShell }:
 
 let fake = name: lib.overrideDerivation (writeScriptBin name ''
   #!${runtimeShell}
diff --git a/pkgs/os-specific/darwin/xcode/sdk-pkgs.nix b/pkgs/os-specific/darwin/xcode/sdk-pkgs.nix
index cc485bb62c64..16ed52ea81e7 100644
--- a/pkgs/os-specific/darwin/xcode/sdk-pkgs.nix
+++ b/pkgs/os-specific/darwin/xcode/sdk-pkgs.nix
@@ -2,7 +2,7 @@
 , clang-unwrapped
 , binutils-unwrapped
 , runCommand
-, stdenv
+
 , wrapBintoolsWith
 , wrapCCWith
 , buildIosSdk, targetIosSdkPkgs
diff --git a/pkgs/os-specific/linux/busybox/sandbox-shell.nix b/pkgs/os-specific/linux/busybox/sandbox-shell.nix
index 036ea0a0f486..f5db0b25f18f 100644
--- a/pkgs/os-specific/linux/busybox/sandbox-shell.nix
+++ b/pkgs/os-specific/linux/busybox/sandbox-shell.nix
@@ -1,4 +1,4 @@
-{ busybox, stdenv}:
+{ busybox}:
 
 # Minimal shell for use as basic /bin/sh in sandbox builds
 busybox.override {
diff --git a/pkgs/os-specific/linux/cpuset/default.nix b/pkgs/os-specific/linux/cpuset/default.nix
index d1a93e4247e9..e82e3f5901c1 100644
--- a/pkgs/os-specific/linux/cpuset/default.nix
+++ b/pkgs/os-specific/linux/cpuset/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , fetchpatch
 , pythonPackages
diff --git a/pkgs/os-specific/linux/ffado/default.nix b/pkgs/os-specific/linux/ffado/default.nix
index 25f541d7a003..e23591168f6e 100644
--- a/pkgs/os-specific/linux/ffado/default.nix
+++ b/pkgs/os-specific/linux/ffado/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , mkDerivation
 , dbus
 , dbus_cplusplus
diff --git a/pkgs/os-specific/linux/firmware/zd1211/default.nix b/pkgs/os-specific/linux/firmware/zd1211/default.nix
index 9baa4eee6219..15e53557126d 100644
--- a/pkgs/os-specific/linux/firmware/zd1211/default.nix
+++ b/pkgs/os-specific/linux/firmware/zd1211/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchzip }:
+{ lib, fetchzip }:
 
 let
   pname = "zd1211-firmware";
diff --git a/pkgs/os-specific/linux/fscrypt/default.nix b/pkgs/os-specific/linux/fscrypt/default.nix
index db4b70037c8f..b60a10c73ede 100644
--- a/pkgs/os-specific/linux/fscrypt/default.nix
+++ b/pkgs/os-specific/linux/fscrypt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, gnum4, pam, fscrypt-experimental }:
+{ lib, buildGoModule, fetchFromGitHub, gnum4, pam, fscrypt-experimental }:
 
 # Don't use this for anything important yet!
 
diff --git a/pkgs/os-specific/linux/iotop/default.nix b/pkgs/os-specific/linux/iotop/default.nix
index 1924e326c1e5..a91175aa59f3 100644
--- a/pkgs/os-specific/linux/iotop/default.nix
+++ b/pkgs/os-specific/linux/iotop/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, python3Packages, fetchpatch }:
+{ lib, fetchurl, python3Packages, fetchpatch }:
 
 python3Packages.buildPythonApplication rec {
   name = "iotop-0.6";
diff --git a/pkgs/os-specific/linux/iproute/mptcp.nix b/pkgs/os-specific/linux/iproute/mptcp.nix
index 6505d1d80eea..7285e27ff36b 100644
--- a/pkgs/os-specific/linux/iproute/mptcp.nix
+++ b/pkgs/os-specific/linux/iproute/mptcp.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, iproute, fetchFromGitHub }:
+{ lib, iproute, fetchFromGitHub }:
 
 iproute.overrideAttrs (oa: rec {
   pname = "iproute_mptcp";
diff --git a/pkgs/os-specific/linux/kernel/hardened/config.nix b/pkgs/os-specific/linux/kernel/hardened/config.nix
index ffd710e632e0..bd0518650d6c 100644
--- a/pkgs/os-specific/linux/kernel/hardened/config.nix
+++ b/pkgs/os-specific/linux/kernel/hardened/config.nix
@@ -8,7 +8,7 @@
 #
 # See also <nixos/modules/profiles/hardened.nix>
 
-{ lib, stdenv, version }:
+{ lib, version }:
 
 with lib;
 with lib.kernel;
diff --git a/pkgs/os-specific/linux/kernel/linux-4.14.nix b/pkgs/os-specific/linux/kernel/linux-4.14.nix
index d1d9e94e2a6b..193f6c3d160b 100644
--- a/pkgs/os-specific/linux/kernel/linux-4.14.nix
+++ b/pkgs/os-specific/linux/kernel/linux-4.14.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPackages, fetchurl, perl, buildLinux, modDirVersionArg ? null, ... } @ args:
+{ lib, buildPackages, fetchurl, perl, buildLinux, modDirVersionArg ? null, ... } @ args:
 
 with lib;
 
diff --git a/pkgs/os-specific/linux/kernel/linux-4.19.nix b/pkgs/os-specific/linux/kernel/linux-4.19.nix
index 2bc5321ea7f6..99425f984f74 100644
--- a/pkgs/os-specific/linux/kernel/linux-4.19.nix
+++ b/pkgs/os-specific/linux/kernel/linux-4.19.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPackages, fetchurl, perl, buildLinux, modDirVersionArg ? null, ... } @ args:
+{ lib, buildPackages, fetchurl, perl, buildLinux, modDirVersionArg ? null, ... } @ args:
 
 with lib;
 
diff --git a/pkgs/os-specific/linux/kernel/linux-4.4.nix b/pkgs/os-specific/linux/kernel/linux-4.4.nix
index 9c04ee72238f..6b2e8f08ecba 100644
--- a/pkgs/os-specific/linux/kernel/linux-4.4.nix
+++ b/pkgs/os-specific/linux/kernel/linux-4.4.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPackages, fetchurl, perl, buildLinux, ... } @ args:
+{ buildPackages, fetchurl, perl, buildLinux, ... } @ args:
 
 buildLinux (args // rec {
   version = "4.4.253";
diff --git a/pkgs/os-specific/linux/kernel/linux-4.9.nix b/pkgs/os-specific/linux/kernel/linux-4.9.nix
index df298ade0842..2c0c3457ef03 100644
--- a/pkgs/os-specific/linux/kernel/linux-4.9.nix
+++ b/pkgs/os-specific/linux/kernel/linux-4.9.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPackages, fetchurl, perl, buildLinux, ... } @ args:
+{ buildPackages, fetchurl, perl, buildLinux, ... } @ args:
 
 buildLinux (args // rec {
   version = "4.9.253";
diff --git a/pkgs/os-specific/linux/kernel/linux-5.10.nix b/pkgs/os-specific/linux/kernel/linux-5.10.nix
index 0eaa148a49c0..2afabcad0424 100644
--- a/pkgs/os-specific/linux/kernel/linux-5.10.nix
+++ b/pkgs/os-specific/linux/kernel/linux-5.10.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPackages, fetchurl, perl, buildLinux, modDirVersionArg ? null, ... } @ args:
+{ lib, buildPackages, fetchurl, perl, buildLinux, modDirVersionArg ? null, ... } @ args:
 
 with lib;
 
diff --git a/pkgs/os-specific/linux/kernel/linux-5.4.nix b/pkgs/os-specific/linux/kernel/linux-5.4.nix
index 0469b731b894..1d098416c3d0 100644
--- a/pkgs/os-specific/linux/kernel/linux-5.4.nix
+++ b/pkgs/os-specific/linux/kernel/linux-5.4.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPackages, fetchurl, perl, buildLinux, modDirVersionArg ? null, ... } @ args:
+{ lib, buildPackages, fetchurl, perl, buildLinux, modDirVersionArg ? null, ... } @ args:
 
 with lib;
 
diff --git a/pkgs/os-specific/linux/kernel/linux-hardkernel-4.14.nix b/pkgs/os-specific/linux/kernel/linux-hardkernel-4.14.nix
index a272bd286f32..a64520ab8932 100644
--- a/pkgs/os-specific/linux/kernel/linux-hardkernel-4.14.nix
+++ b/pkgs/os-specific/linux/kernel/linux-hardkernel-4.14.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPackages, fetchFromGitHub, perl, buildLinux, libelf, util-linux, ... } @ args:
+{ buildPackages, fetchFromGitHub, perl, buildLinux, libelf, util-linux, ... } @ args:
 
 buildLinux (args // rec {
   version = "4.14.165-172";
diff --git a/pkgs/os-specific/linux/kernel/linux-lqx.nix b/pkgs/os-specific/linux/kernel/linux-lqx.nix
index 35df8e99ddca..3c938fd8e6f5 100644
--- a/pkgs/os-specific/linux/kernel/linux-lqx.nix
+++ b/pkgs/os-specific/linux/kernel/linux-lqx.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildLinux, linux_zen, ... } @ args:
+{ lib, fetchFromGitHub, buildLinux, linux_zen, ... } @ args:
 
 let
   version = "5.10.9";
diff --git a/pkgs/os-specific/linux/kernel/linux-mptcp-95.nix b/pkgs/os-specific/linux/kernel/linux-mptcp-95.nix
index f7bca36481bf..cd661be1078c 100644
--- a/pkgs/os-specific/linux/kernel/linux-mptcp-95.nix
+++ b/pkgs/os-specific/linux/kernel/linux-mptcp-95.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPackages, fetchFromGitHub, perl, buildLinux, structuredExtraConfig ? {}, ... } @ args:
+{ lib, buildPackages, fetchFromGitHub, perl, buildLinux, structuredExtraConfig ? {}, ... } @ args:
 let
   mptcpVersion = "0.95";
   modDirVersion = "4.19.55";
diff --git a/pkgs/os-specific/linux/kernel/linux-testing-bcachefs.nix b/pkgs/os-specific/linux/kernel/linux-testing-bcachefs.nix
index 5f0f513ff459..b1874bf38202 100644
--- a/pkgs/os-specific/linux/kernel/linux-testing-bcachefs.nix
+++ b/pkgs/os-specific/linux/kernel/linux-testing-bcachefs.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPackages, fetchFromGitHub, fetchpatch, perl, buildLinux, ... } @ args:
+{ lib, buildPackages, fetchFromGitHub, fetchpatch, perl, buildLinux, ... } @ args:
 
 buildLinux (args // {
   version = "5.9.0-2020.11.20";
diff --git a/pkgs/os-specific/linux/kernel/linux-testing.nix b/pkgs/os-specific/linux/kernel/linux-testing.nix
index 98fafaadece7..5210e3ed7a8c 100644
--- a/pkgs/os-specific/linux/kernel/linux-testing.nix
+++ b/pkgs/os-specific/linux/kernel/linux-testing.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPackages, fetchurl, perl, buildLinux, modDirVersionArg ? null, ... } @ args:
+{ lib, buildPackages, fetchurl, perl, buildLinux, modDirVersionArg ? null, ... } @ args:
 
 with lib;
 
diff --git a/pkgs/os-specific/linux/kernel/linux-zen.nix b/pkgs/os-specific/linux/kernel/linux-zen.nix
index aa73e7b8a3e8..b30afb59ca8e 100644
--- a/pkgs/os-specific/linux/kernel/linux-zen.nix
+++ b/pkgs/os-specific/linux/kernel/linux-zen.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildLinux, ... } @ args:
+{ lib, fetchFromGitHub, buildLinux, ... } @ args:
 
 let
   version = "5.10.9";
diff --git a/pkgs/os-specific/linux/net-tools/mptcp.nix b/pkgs/os-specific/linux/net-tools/mptcp.nix
index a9f99874367c..577b7c25311a 100644
--- a/pkgs/os-specific/linux/net-tools/mptcp.nix
+++ b/pkgs/os-specific/linux/net-tools/mptcp.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, nettools, fetchFromGitHub  }:
+{ lib, nettools, fetchFromGitHub  }:
 
 nettools.overrideAttrs(oa: rec {
   name = "net-tools-mptcp";
diff --git a/pkgs/os-specific/linux/oci-seccomp-bpf-hook/default.nix b/pkgs/os-specific/linux/oci-seccomp-bpf-hook/default.nix
index c74810d24d5a..f15a5b637790 100644
--- a/pkgs/os-specific/linux/oci-seccomp-bpf-hook/default.nix
+++ b/pkgs/os-specific/linux/oci-seccomp-bpf-hook/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildGoModule
 , fetchFromGitHub
 , go-md2man
diff --git a/pkgs/os-specific/linux/openrazer/driver.nix b/pkgs/os-specific/linux/openrazer/driver.nix
index 32c99a8be13a..4745ba818a90 100644
--- a/pkgs/os-specific/linux/openrazer/driver.nix
+++ b/pkgs/os-specific/linux/openrazer/driver.nix
@@ -7,7 +7,7 @@
 }:
 
 let
-  common = import ../../../development/python-modules/openrazer/common.nix { inherit lib stdenv fetchFromGitHub; };
+  common = import ../../../development/python-modules/openrazer/common.nix { inherit lib fetchFromGitHub; };
 in
 stdenv.mkDerivation (common // {
   name = "openrazer-${common.version}-${kernel.version}";
diff --git a/pkgs/os-specific/linux/piper/default.nix b/pkgs/os-specific/linux/piper/default.nix
index 1ef304c617f7..839b3f1b78f5 100644
--- a/pkgs/os-specific/linux/piper/default.nix
+++ b/pkgs/os-specific/linux/piper/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, meson, ninja, pkg-config, gettext, fetchFromGitHub, python3
+{ lib, meson, ninja, pkg-config, gettext, fetchFromGitHub, python3
 , wrapGAppsHook, gtk3, glib, desktop-file-utils, appstream-glib, gnome3
 , gobject-introspection }:
 
diff --git a/pkgs/os-specific/linux/s6-linux-init/default.nix b/pkgs/os-specific/linux/s6-linux-init/default.nix
index 2fb6c9441edc..87cc098d07d4 100644
--- a/pkgs/os-specific/linux/s6-linux-init/default.nix
+++ b/pkgs/os-specific/linux/s6-linux-init/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, skawarePackages }:
+{ lib, skawarePackages }:
 
 with skawarePackages;
 
diff --git a/pkgs/os-specific/linux/s6-linux-utils/default.nix b/pkgs/os-specific/linux/s6-linux-utils/default.nix
index 209f596d273e..132a0b49574c 100644
--- a/pkgs/os-specific/linux/s6-linux-utils/default.nix
+++ b/pkgs/os-specific/linux/s6-linux-utils/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, skawarePackages }:
+{ lib, skawarePackages }:
 
 with skawarePackages;
 
diff --git a/pkgs/os-specific/linux/sd-switch/default.nix b/pkgs/os-specific/linux/sd-switch/default.nix
index 026488a24ded..a58b7efa7b30 100644
--- a/pkgs/os-specific/linux/sd-switch/default.nix
+++ b/pkgs/os-specific/linux/sd-switch/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitLab, rustPlatform, pkg-config, dbus }:
+{ lib, fetchFromGitLab, rustPlatform, pkg-config, dbus }:
 
 rustPlatform.buildRustPackage rec {
   pname = "sd-switch";
diff --git a/pkgs/os-specific/linux/setools/default.nix b/pkgs/os-specific/linux/setools/default.nix
index bcdb622866b8..0da84ab1cefd 100644
--- a/pkgs/os-specific/linux/setools/default.nix
+++ b/pkgs/os-specific/linux/setools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3
+{ lib, fetchFromGitHub, python3
 , libsepol, libselinux, checkpolicy
 , withGraphics ? false
 }:
diff --git a/pkgs/os-specific/linux/targetcli/default.nix b/pkgs/os-specific/linux/targetcli/default.nix
index ba1c063cc054..4d3446d5a5d6 100644
--- a/pkgs/os-specific/linux/targetcli/default.nix
+++ b/pkgs/os-specific/linux/targetcli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3, fetchFromGitHub }:
+{ lib, python3, fetchFromGitHub }:
 
 python3.pkgs.buildPythonApplication rec {
   pname = "targetcli";
diff --git a/pkgs/os-specific/linux/trace-cmd/kernelshark.nix b/pkgs/os-specific/linux/trace-cmd/kernelshark.nix
index 4db4d64bc939..594cf6bfc42f 100644
--- a/pkgs/os-specific/linux/trace-cmd/kernelshark.nix
+++ b/pkgs/os-specific/linux/trace-cmd/kernelshark.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchgit, qtbase, cmake, asciidoc, docbook_xsl, json_c, mesa_glu, freeglut, trace-cmd, pkg-config }:
+{ lib, mkDerivation, fetchgit, qtbase, cmake, asciidoc, docbook_xsl, json_c, mesa_glu, freeglut, trace-cmd, pkg-config }:
 mkDerivation {
   pname = "kernelshark";
   version = "1.1.0";
diff --git a/pkgs/os-specific/linux/undervolt/default.nix b/pkgs/os-specific/linux/undervolt/default.nix
index 5f4ffb50c07b..cc9fb7374658 100644
--- a/pkgs/os-specific/linux/undervolt/default.nix
+++ b/pkgs/os-specific/linux/undervolt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   version = "0.3.0";
diff --git a/pkgs/os-specific/linux/wpa_supplicant/gui.nix b/pkgs/os-specific/linux/wpa_supplicant/gui.nix
index ab1cece0f339..d2d59ba21a5e 100644
--- a/pkgs/os-specific/linux/wpa_supplicant/gui.nix
+++ b/pkgs/os-specific/linux/wpa_supplicant/gui.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchpatch, qtbase, qmake, inkscape, imagemagick, wpa_supplicant }:
+{ lib, mkDerivation, fetchpatch, qtbase, qmake, inkscape, imagemagick, wpa_supplicant }:
 
 mkDerivation {
   name = "wpa_gui-${wpa_supplicant.version}";
diff --git a/pkgs/servers/caddy/default.nix b/pkgs/servers/caddy/default.nix
index d48bcad17946..3e6641b8d26f 100644
--- a/pkgs/servers/caddy/default.nix
+++ b/pkgs/servers/caddy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, nixosTests }:
+{ lib, buildGoModule, fetchFromGitHub, nixosTests }:
 
 buildGoModule rec {
   pname = "caddy";
diff --git a/pkgs/servers/cayley/default.nix b/pkgs/servers/cayley/default.nix
index 8ab171a2f437..c9d06d497714 100644
--- a/pkgs/servers/cayley/default.nix
+++ b/pkgs/servers/cayley/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "cayley";
diff --git a/pkgs/servers/cloud-print-connector/default.nix b/pkgs/servers/cloud-print-connector/default.nix
index 8e1ef8312691..f6f6a0fbd715 100644
--- a/pkgs/servers/cloud-print-connector/default.nix
+++ b/pkgs/servers/cloud-print-connector/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, avahi, cups, fetchpatch }:
+{ lib, buildGoPackage, fetchFromGitHub, avahi, cups, fetchpatch }:
 
 # TODO: Add a service for gcp-cups-connector and perhaps some other
 # kind of configuration for the same thing that gcp-connector-util
diff --git a/pkgs/servers/consul/default.nix b/pkgs/servers/consul/default.nix
index 4c0ce8d511e8..9dc723417d60 100644
--- a/pkgs/servers/consul/default.nix
+++ b/pkgs/servers/consul/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, nixosTests }:
+{ lib, buildGoModule, fetchFromGitHub, nixosTests }:
 
 buildGoModule rec {
   pname = "consul";
diff --git a/pkgs/servers/demoit/default.nix b/pkgs/servers/demoit/default.nix
index 0c6fe8187756..4a499e7f878c 100644
--- a/pkgs/servers/demoit/default.nix
+++ b/pkgs/servers/demoit/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildGoModule
 , fetchFromGitHub
 }:
diff --git a/pkgs/servers/dns/coredns/default.nix b/pkgs/servers/dns/coredns/default.nix
index adb1a7f329bc..cdfc78d62229 100644
--- a/pkgs/servers/dns/coredns/default.nix
+++ b/pkgs/servers/dns/coredns/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "coredns";
diff --git a/pkgs/servers/foundationdb/default.nix b/pkgs/servers/foundationdb/default.nix
index 0e608051a9ea..10d517179c2f 100644
--- a/pkgs/servers/foundationdb/default.nix
+++ b/pkgs/servers/foundationdb/default.nix
@@ -1,4 +1,4 @@
-{ gcc6Stdenv, stdenv, gccStdenv, llvmPackages
+{ gcc6Stdenv, gccStdenv, llvmPackages
 , lib, fetchurl, fetchpatch, fetchFromGitHub
 
 , cmake, ninja, which, findutils, m4, gawk
diff --git a/pkgs/servers/gotty/default.nix b/pkgs/servers/gotty/default.nix
index c4881baeac06..7bd09569248f 100644
--- a/pkgs/servers/gotty/default.nix
+++ b/pkgs/servers/gotty/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "gotty";
diff --git a/pkgs/servers/headphones/default.nix b/pkgs/servers/headphones/default.nix
index 75d15d4f3786..67b328d661a9 100644
--- a/pkgs/servers/headphones/default.nix
+++ b/pkgs/servers/headphones/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python2, makeWrapper }:
+{ lib, fetchFromGitHub, python2, makeWrapper }:
 
 python2.pkgs.buildPythonApplication rec {
   pname = "headphones";
diff --git a/pkgs/servers/holochain-go/default.nix b/pkgs/servers/holochain-go/default.nix
index e6e35c35900e..0d138e1f648e 100644
--- a/pkgs/servers/holochain-go/default.nix
+++ b/pkgs/servers/holochain-go/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "holochain-go${version}";
diff --git a/pkgs/servers/http/hyp/default.nix b/pkgs/servers/http/hyp/default.nix
index 52f345d54771..1faa85cfc141 100644
--- a/pkgs/servers/http/hyp/default.nix
+++ b/pkgs/servers/http/hyp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, python3Packages }:
+{ lib, fetchurl, python3Packages }:
 
 python3Packages.buildPythonPackage rec {
   pname = "hyp-server";
diff --git a/pkgs/servers/hydron/default.nix b/pkgs/servers/hydron/default.nix
index 8b950ec12c54..41c69bde2852 100644
--- a/pkgs/servers/hydron/default.nix
+++ b/pkgs/servers/hydron/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, pkg-config, ffmpeg }:
+{ lib, buildGoModule, fetchFromGitHub, pkg-config, ffmpeg }:
 
 buildGoModule rec {
   pname = "hydron";
diff --git a/pkgs/servers/icingaweb2/default.nix b/pkgs/servers/icingaweb2/default.nix
index eaf16e388048..e7d9b1a2847b 100644
--- a/pkgs/servers/icingaweb2/default.nix
+++ b/pkgs/servers/icingaweb2/default.nix
@@ -1,4 +1,6 @@
-{ stdenv, lib, fetchFromGitHub, makeWrapper, php }: with lib; stdenv.mkDerivation rec {
+{ stdenv, lib, fetchFromGitHub, makeWrapper, php }:
+
+stdenv.mkDerivation rec {
   pname = "icingaweb2";
   version = "2.8.2";
 
@@ -16,10 +18,10 @@
     cp -ra application bin etc library modules public $out
     cp -ra doc $out/share
 
-    wrapProgram $out/bin/icingacli --prefix PATH : "${makeBinPath [ php ]}"
+    wrapProgram $out/bin/icingacli --prefix PATH : "${lib.makeBinPath [ php ]}"
   '';
 
-  meta = {
+  meta = with lib; {
     description = "Webinterface for Icinga 2";
     longDescription = ''
       A lightweight and extensible web interface to keep an eye on your environment.
diff --git a/pkgs/servers/icingaweb2/theme-april/default.nix b/pkgs/servers/icingaweb2/theme-april/default.nix
index 7c592fca33b6..0a152a7e157e 100644
--- a/pkgs/servers/icingaweb2/theme-april/default.nix
+++ b/pkgs/servers/icingaweb2/theme-april/default.nix
@@ -1,4 +1,9 @@
-{ stdenv, lib, fetchFromGitHub }: with lib; stdenv.mkDerivation rec {
+{ lib
+, stdenv
+, fetchFromGitHub
+}:
+
+stdenv.mkDerivation rec {
   name = "icingaweb2-theme-april";
   version = "1.0.4";
 
@@ -14,7 +19,7 @@
     cp -r * "$out"
   '';
 
-  meta = {
+  meta = with lib; {
     description = "Icingaweb2 theme for april fools";
     homepage = "https://github.com/Mikesch-mp/icingaweb2-theme-april";
     license = licenses.publicDomain;
diff --git a/pkgs/servers/icingaweb2/theme-lsd/default.nix b/pkgs/servers/icingaweb2/theme-lsd/default.nix
index 273bcf6945d9..59b8df6b4d42 100644
--- a/pkgs/servers/icingaweb2/theme-lsd/default.nix
+++ b/pkgs/servers/icingaweb2/theme-lsd/default.nix
@@ -1,4 +1,9 @@
-{ stdenv, lib, fetchFromGitHub }: with lib; stdenv.mkDerivation rec {
+{ lib
+, stdenv
+, fetchFromGitHub
+}:
+
+stdenv.mkDerivation rec {
   name = "icingaweb2-theme-lsd";
   version = "1.0.3";
 
@@ -14,7 +19,7 @@
     cp -r * "$out"
   '';
 
-  meta = {
+  meta = with lib; {
     description = "Psychadelic theme for IcingaWeb 2";
     homepage = "https://github.com/Mikesch-mp/icingaweb2-theme-lsd";
     license = licenses.publicDomain;
diff --git a/pkgs/servers/icingaweb2/theme-particles/default.nix b/pkgs/servers/icingaweb2/theme-particles/default.nix
index 3d28481cd84e..ddd363701a7c 100644
--- a/pkgs/servers/icingaweb2/theme-particles/default.nix
+++ b/pkgs/servers/icingaweb2/theme-particles/default.nix
@@ -1,4 +1,9 @@
-{ stdenv, lib, fetchFromGitHub }: with lib; stdenv.mkDerivation rec {
+{ lib
+, stdenv
+, fetchFromGitHub
+}:
+
+stdenv.mkDerivation rec {
   name = "icingaweb2-theme-particles";
   version = "1.0.0";
 
@@ -14,7 +19,7 @@
     cp -r * "$out"
   '';
 
-  meta = {
+  meta = with lib; {
     description = "This theme adds a nice particle effect to the login screen of Icingaweb 2";
     homepage = "https://github.com/Mikesch-mp/icingaweb2-theme-particles";
     license = licenses.publicDomain;
diff --git a/pkgs/servers/icingaweb2/theme-snow/default.nix b/pkgs/servers/icingaweb2/theme-snow/default.nix
index 941138bb0a52..5650d1ccdba8 100644
--- a/pkgs/servers/icingaweb2/theme-snow/default.nix
+++ b/pkgs/servers/icingaweb2/theme-snow/default.nix
@@ -1,4 +1,9 @@
-{ stdenv, lib, fetchFromGitHub }: with lib; stdenv.mkDerivation rec {
+{ lib
+, stdenv
+, fetchFromGitHub
+}:
+
+stdenv.mkDerivation rec {
   name = "icingaweb2-theme-snow";
   version = "1.0.0";
 
@@ -20,7 +25,7 @@
     cp -r * "$out"
   '';
 
-  meta = {
+  meta = with lib; {
     description = "Snow theme for Icingaweb 2";
     homepage = "https://github.com/Mikesch-mp/icingaweb2-theme-snow";
     license = licenses.publicDomain;
diff --git a/pkgs/servers/icingaweb2/theme-spring/default.nix b/pkgs/servers/icingaweb2/theme-spring/default.nix
index a21f6cc89a25..dda26caf6a19 100644
--- a/pkgs/servers/icingaweb2/theme-spring/default.nix
+++ b/pkgs/servers/icingaweb2/theme-spring/default.nix
@@ -1,4 +1,9 @@
-{ stdenv, lib, fetchFromGitHub }: with lib; stdenv.mkDerivation rec {
+{ lib
+, stdenv
+, fetchFromGitHub
+}:
+
+stdenv.mkDerivation rec {
   name = "icingaweb2-theme-spring";
   version = "1.0.0";
 
@@ -14,7 +19,7 @@
     cp -r * "$out"
   '';
 
-  meta = {
+  meta = with lib; {
     description = "Theme with some soft colors and nice background images loaded from unsplash.com";
     homepage = "https://github.com/Mikesch-mp/icingaweb2-theme-spring";
     license = licenses.publicDomain;
diff --git a/pkgs/servers/icingaweb2/theme-unicorn/default.nix b/pkgs/servers/icingaweb2/theme-unicorn/default.nix
index a43f7d7c09ad..a2bb3f9e4a2b 100644
--- a/pkgs/servers/icingaweb2/theme-unicorn/default.nix
+++ b/pkgs/servers/icingaweb2/theme-unicorn/default.nix
@@ -1,4 +1,10 @@
-{ stdenv, lib, fetchurl, fetchFromGitHub }: with lib; stdenv.mkDerivation rec {
+{ lib
+, stdenv
+, fetchurl
+, fetchFromGitHub
+}:
+
+stdenv.mkDerivation rec {
   name = "icingaweb2-theme-unicorn";
   version = "1.0.2";
 
@@ -35,7 +41,7 @@
     cp unicorn.png "$out/public/img/unicorn.png"
   '';
 
-  meta = {
+  meta = with lib; {
     description = "Unicorn theme for IcingaWeb 2";
     homepage = "https://github.com/Mikesch-mp/icingaweb2-theme-unicorn";
     license = licenses.publicDomain;
diff --git a/pkgs/servers/identd/nullidentdmod/default.nix b/pkgs/servers/identd/nullidentdmod/default.nix
index b383135f2eb5..ee759ac55ea1 100644
--- a/pkgs/servers/identd/nullidentdmod/default.nix
+++ b/pkgs/servers/identd/nullidentdmod/default.nix
@@ -1,4 +1,6 @@
-{ lib, stdenv, fetchFromGitHub, ... }: stdenv.mkDerivation rec {
+{ lib, stdenv, fetchFromGitHub, ... }:
+
+stdenv.mkDerivation rec {
   pname = "nullidentdmod";
   version = "1.3";
 
diff --git a/pkgs/servers/irc/robustirc-bridge/default.nix b/pkgs/servers/irc/robustirc-bridge/default.nix
index d0b192010c10..2530c72cbb9d 100644
--- a/pkgs/servers/irc/robustirc-bridge/default.nix
+++ b/pkgs/servers/irc/robustirc-bridge/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, nixosTests }:
+{ lib, buildGoModule, fetchFromGitHub, nixosTests }:
 
 buildGoModule rec {
   pname = "robustirc-bridge";
diff --git a/pkgs/servers/isso/default.nix b/pkgs/servers/isso/default.nix
index 4680c37c85e3..b9bce56d9fa0 100644
--- a/pkgs/servers/isso/default.nix
+++ b/pkgs/servers/isso/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, fetchFromGitHub }:
+{ lib, python3Packages, fetchFromGitHub }:
 
 with python3Packages; buildPythonApplication rec {
 
diff --git a/pkgs/servers/kapowbang/default.nix b/pkgs/servers/kapowbang/default.nix
index b52018b64f4c..94a1832bd8d3 100644
--- a/pkgs/servers/kapowbang/default.nix
+++ b/pkgs/servers/kapowbang/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "kapowbang";
diff --git a/pkgs/servers/livepeer/default.nix b/pkgs/servers/livepeer/default.nix
index acfa1aa2c3fb..a016c8e7f099 100644
--- a/pkgs/servers/livepeer/default.nix
+++ b/pkgs/servers/livepeer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoModule
+{ lib, fetchFromGitHub, buildGoModule
 , pkg-config, ffmpeg, gnutls
 }:
 
diff --git a/pkgs/servers/mail/mailhog/default.nix b/pkgs/servers/mail/mailhog/default.nix
index f1ba497720a9..674fdbabb4eb 100644
--- a/pkgs/servers/mail/mailhog/default.nix
+++ b/pkgs/servers/mail/mailhog/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "MailHog";
diff --git a/pkgs/servers/mail/mailman/default.nix b/pkgs/servers/mail/mailman/default.nix
index 57ceee948b50..9a86cc31fdd8 100644
--- a/pkgs/servers/mail/mailman/default.nix
+++ b/pkgs/servers/mail/mailman/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, fetchpatch, isPy3k, alembic, aiosmtpd, dnspython
+{ lib, buildPythonPackage, fetchPypi, fetchpatch, isPy3k, alembic, aiosmtpd, dnspython
 , flufl_bounce, flufl_i18n, flufl_lock, lazr_config, lazr_delegates, passlib
 , requests, zope_configuration, click, falcon, importlib-resources
 , zope_component, lynx, postfix, authheaders, gunicorn
diff --git a/pkgs/servers/mail/mailman/hyperkitty.nix b/pkgs/servers/mail/mailman/hyperkitty.nix
index 58ef52e9c26d..00cf2c1e83c0 100644
--- a/pkgs/servers/mail/mailman/hyperkitty.nix
+++ b/pkgs/servers/mail/mailman/hyperkitty.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k, isort, coverage, mock
+{ lib, buildPythonPackage, fetchPypi, isPy3k, isort, coverage, mock
 , robot-detection, django_extensions, rjsmin, cssmin, django-mailman3
 , django-haystack, flufl_lock, networkx, dateutil, defusedxml
 , django-paintstore, djangorestframework, django, django-q
diff --git a/pkgs/servers/mail/mailman/postorius.nix b/pkgs/servers/mail/mailman/postorius.nix
index ab8ad4440ab6..9330de3a8f38 100644
--- a/pkgs/servers/mail/mailman/postorius.nix
+++ b/pkgs/servers/mail/mailman/postorius.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, beautifulsoup4, vcrpy, mock
+{ lib, buildPythonPackage, fetchPypi, beautifulsoup4, vcrpy, mock
 , django-mailman3, mailmanclient, readme_renderer
 }:
 
diff --git a/pkgs/servers/mail/postfix/pflogsumm.nix b/pkgs/servers/mail/postfix/pflogsumm.nix
index 1c92a4a76764..800a69e95096 100644
--- a/pkgs/servers/mail/postfix/pflogsumm.nix
+++ b/pkgs/servers/mail/postfix/pflogsumm.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, perlPackages }:
+{ lib, fetchurl, perlPackages }:
 
 perlPackages.buildPerlPackage rec {
   pname = "pflogsumm";
diff --git a/pkgs/servers/mail/postgrey/default.nix b/pkgs/servers/mail/postgrey/default.nix
index d0eaf40d06c7..07b351bfb216 100644
--- a/pkgs/servers/mail/postgrey/default.nix
+++ b/pkgs/servers/mail/postgrey/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, perlPackages, lib, runCommand, postfix }:
+{ fetchurl, perlPackages, lib, runCommand, postfix }:
 
 let
     mk-perl-flags = inputs: lib.concatStringsSep " " (map (dep: "-I ${dep}/${perlPackages.perl.libPrefix}") inputs);
diff --git a/pkgs/servers/mail/spamassassin/default.nix b/pkgs/servers/mail/spamassassin/default.nix
index c5980bc8889e..ff96f0e7c827 100644
--- a/pkgs/servers/mail/spamassassin/default.nix
+++ b/pkgs/servers/mail/spamassassin/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, perlPackages, makeWrapper, gnupg }:
+{ lib, fetchurl, perlPackages, makeWrapper, gnupg }:
 
 perlPackages.buildPerlPackage rec {
   pname = "SpamAssassin";
diff --git a/pkgs/servers/matterbridge/default.nix b/pkgs/servers/matterbridge/default.nix
index df22aab1f957..6d12ac84d901 100644
--- a/pkgs/servers/matterbridge/default.nix
+++ b/pkgs/servers/matterbridge/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchurl }:
+{ lib, buildGoModule, fetchurl }:
 
 buildGoModule rec {
   pname = "matterbridge";
diff --git a/pkgs/servers/mattermost/matterircd.nix b/pkgs/servers/mattermost/matterircd.nix
index 36edd851f36f..3abb728bec1d 100644
--- a/pkgs/servers/mattermost/matterircd.nix
+++ b/pkgs/servers/mattermost/matterircd.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "matterircd";
diff --git a/pkgs/servers/mautrix-whatsapp/default.nix b/pkgs/servers/mautrix-whatsapp/default.nix
index eea873929275..a17d8a55acc8 100644
--- a/pkgs/servers/mautrix-whatsapp/default.nix
+++ b/pkgs/servers/mautrix-whatsapp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, olm }:
+{ lib, buildGoModule, fetchFromGitHub, olm }:
 
 buildGoModule rec {
   pname = "mautrix-whatsapp";
diff --git a/pkgs/servers/miniflux/default.nix b/pkgs/servers/miniflux/default.nix
index 55dd3d8afc59..7781124259b6 100644
--- a/pkgs/servers/miniflux/default.nix
+++ b/pkgs/servers/miniflux/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, installShellFiles, nixosTests }:
+{ lib, buildGoModule, fetchFromGitHub, installShellFiles, nixosTests }:
 
 let
   pname = "miniflux";
diff --git a/pkgs/servers/minio/default.nix b/pkgs/servers/minio/default.nix
index d54232fd7f2e..9477da8a3f80 100644
--- a/pkgs/servers/minio/default.nix
+++ b/pkgs/servers/minio/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, nixosTests }:
+{ lib, buildGoModule, fetchFromGitHub, nixosTests }:
 
 buildGoModule rec {
   pname = "minio";
diff --git a/pkgs/servers/misc/client-ip-echo/client-ip-echo.nix b/pkgs/servers/misc/client-ip-echo/client-ip-echo.nix
index a696bc413515..d6a25b3675ff 100644
--- a/pkgs/servers/misc/client-ip-echo/client-ip-echo.nix
+++ b/pkgs/servers/misc/client-ip-echo/client-ip-echo.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, fetchFromGitHub, base, bytestring, network, lib, stdenv }:
+{ mkDerivation, fetchFromGitHub, base, bytestring, network, lib }:
 mkDerivation {
   pname = "client-ip-echo";
   version = "0.1.0.5";
diff --git a/pkgs/servers/monitoring/alertmanager-bot/default.nix b/pkgs/servers/monitoring/alertmanager-bot/default.nix
index 7f4959e58ebe..1eaaf01578fe 100644
--- a/pkgs/servers/monitoring/alertmanager-bot/default.nix
+++ b/pkgs/servers/monitoring/alertmanager-bot/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "alertmanager-bot";
diff --git a/pkgs/servers/monitoring/cadvisor/default.nix b/pkgs/servers/monitoring/cadvisor/default.nix
index 630006649212..8501aa5e02cd 100644
--- a/pkgs/servers/monitoring/cadvisor/default.nix
+++ b/pkgs/servers/monitoring/cadvisor/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "cadvisor";
diff --git a/pkgs/servers/monitoring/consul-alerts/default.nix b/pkgs/servers/monitoring/consul-alerts/default.nix
index 896664658cf1..4cf5f6b80682 100644
--- a/pkgs/servers/monitoring/consul-alerts/default.nix
+++ b/pkgs/servers/monitoring/consul-alerts/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "consul-alerts";
diff --git a/pkgs/servers/monitoring/fusion-inventory/default.nix b/pkgs/servers/monitoring/fusion-inventory/default.nix
index 5d825dbe7f26..0034c253c774 100644
--- a/pkgs/servers/monitoring/fusion-inventory/default.nix
+++ b/pkgs/servers/monitoring/fusion-inventory/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, perlPackages, nix, dmidecode, pciutils, usbutils, iproute, nettools
+{ lib, perlPackages, nix, dmidecode, pciutils, usbutils, iproute, nettools
 , fetchFromGitHub, makeWrapper
 }:
 
diff --git a/pkgs/servers/monitoring/grafana-reporter/default.nix b/pkgs/servers/monitoring/grafana-reporter/default.nix
index 43346e9353f3..da60be64603e 100644
--- a/pkgs/servers/monitoring/grafana-reporter/default.nix
+++ b/pkgs/servers/monitoring/grafana-reporter/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, tetex, makeWrapper }:
+{ lib, buildGoPackage, fetchFromGitHub, tetex, makeWrapper }:
 
 with lib;
 
diff --git a/pkgs/servers/monitoring/plugins/esxi.nix b/pkgs/servers/monitoring/plugins/esxi.nix
index 11183dcc2f29..1ca9e702e7ad 100644
--- a/pkgs/servers/monitoring/plugins/esxi.nix
+++ b/pkgs/servers/monitoring/plugins/esxi.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 let
   bName = "check_esxi_hardware";
diff --git a/pkgs/servers/monitoring/prometheus/alertmanager.nix b/pkgs/servers/monitoring/prometheus/alertmanager.nix
index 19b98124e8e2..bc3cf7539ece 100644
--- a/pkgs/servers/monitoring/prometheus/alertmanager.nix
+++ b/pkgs/servers/monitoring/prometheus/alertmanager.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, go, buildGoPackage, fetchFromGitHub, installShellFiles }:
+{ lib, go, buildGoPackage, fetchFromGitHub, installShellFiles }:
 
 buildGoPackage rec {
   pname = "alertmanager";
diff --git a/pkgs/servers/monitoring/prometheus/apcupsd-exporter.nix b/pkgs/servers/monitoring/prometheus/apcupsd-exporter.nix
index 648bb59b0d2d..64105c9c58f2 100644
--- a/pkgs/servers/monitoring/prometheus/apcupsd-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/apcupsd-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, nixosTests }:
+{ lib, buildGoModule, fetchFromGitHub, nixosTests }:
 
 buildGoModule rec {
   pname = "apcupsd-exporter";
diff --git a/pkgs/servers/monitoring/prometheus/aws-s3-exporter.nix b/pkgs/servers/monitoring/prometheus/aws-s3-exporter.nix
index 2548e196837a..af58a6ebe947 100644
--- a/pkgs/servers/monitoring/prometheus/aws-s3-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/aws-s3-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "aws-s3-exporter";
diff --git a/pkgs/servers/monitoring/prometheus/bind-exporter.nix b/pkgs/servers/monitoring/prometheus/bind-exporter.nix
index 1a86a0e38d9c..5cfdf6158300 100644
--- a/pkgs/servers/monitoring/prometheus/bind-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/bind-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, nixosTests }:
+{ lib, buildGoPackage, fetchFromGitHub, nixosTests }:
 
 buildGoPackage rec {
   pname = "bind_exporter";
diff --git a/pkgs/servers/monitoring/prometheus/bird-exporter.nix b/pkgs/servers/monitoring/prometheus/bird-exporter.nix
index 5670233b0547..3cb04304e26d 100644
--- a/pkgs/servers/monitoring/prometheus/bird-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/bird-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, nixosTests }:
+{ lib, buildGoModule, fetchFromGitHub, nixosTests }:
 
 buildGoModule rec {
   pname = "bird-exporter";
diff --git a/pkgs/servers/monitoring/prometheus/blackbox-exporter.nix b/pkgs/servers/monitoring/prometheus/blackbox-exporter.nix
index 3140056a2696..88ef3f02602c 100644
--- a/pkgs/servers/monitoring/prometheus/blackbox-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/blackbox-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, nixosTests }:
+{ lib, buildGoPackage, fetchFromGitHub, nixosTests }:
 
 buildGoPackage rec {
   pname = "blackbox_exporter";
diff --git a/pkgs/servers/monitoring/prometheus/collectd-exporter.nix b/pkgs/servers/monitoring/prometheus/collectd-exporter.nix
index f86c3a42773c..b3b61567d481 100644
--- a/pkgs/servers/monitoring/prometheus/collectd-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/collectd-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, nixosTests }:
+{ lib, buildGoPackage, fetchFromGitHub, nixosTests }:
 
 buildGoPackage rec {
   pname = "collectd-exporter";
diff --git a/pkgs/servers/monitoring/prometheus/consul-exporter.nix b/pkgs/servers/monitoring/prometheus/consul-exporter.nix
index ab4b67402d39..c3cc7eff90aa 100644
--- a/pkgs/servers/monitoring/prometheus/consul-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/consul-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "consul_exporter";
diff --git a/pkgs/servers/monitoring/prometheus/dnsmasq-exporter.nix b/pkgs/servers/monitoring/prometheus/dnsmasq-exporter.nix
index e01417186960..875db1777fba 100644
--- a/pkgs/servers/monitoring/prometheus/dnsmasq-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/dnsmasq-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, nixosTests }:
+{ lib, buildGoModule, fetchFromGitHub, nixosTests }:
 
 buildGoModule rec {
   pname = "dnsmasq_exporter";
diff --git a/pkgs/servers/monitoring/prometheus/dovecot-exporter.nix b/pkgs/servers/monitoring/prometheus/dovecot-exporter.nix
index c0d96b08bb65..ff7156360a9c 100644
--- a/pkgs/servers/monitoring/prometheus/dovecot-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/dovecot-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, nixosTests }:
+{ lib, buildGoPackage, fetchFromGitHub, nixosTests }:
 
 buildGoPackage rec {
   pname = "dovecot_exporter";
diff --git a/pkgs/servers/monitoring/prometheus/fritzbox-exporter.nix b/pkgs/servers/monitoring/prometheus/fritzbox-exporter.nix
index bc9058e36d97..cefa4579069f 100644
--- a/pkgs/servers/monitoring/prometheus/fritzbox-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/fritzbox-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, nixosTests }:
+{ lib, buildGoPackage, fetchFromGitHub, nixosTests }:
 
 buildGoPackage rec {
   pname = "fritzbox-exporter";
diff --git a/pkgs/servers/monitoring/prometheus/gitlab-ci-pipelines-exporter.nix b/pkgs/servers/monitoring/prometheus/gitlab-ci-pipelines-exporter.nix
index 718c8f2fcb13..18055f9b06a0 100644
--- a/pkgs/servers/monitoring/prometheus/gitlab-ci-pipelines-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/gitlab-ci-pipelines-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "gitlab-ci-pipelines-exporter";
diff --git a/pkgs/servers/monitoring/prometheus/haproxy-exporter.nix b/pkgs/servers/monitoring/prometheus/haproxy-exporter.nix
index e12c76e09f04..6a42297d502a 100644
--- a/pkgs/servers/monitoring/prometheus/haproxy-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/haproxy-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "haproxy_exporter";
diff --git a/pkgs/servers/monitoring/prometheus/keylight-exporter.nix b/pkgs/servers/monitoring/prometheus/keylight-exporter.nix
index e7ecffee9927..a551e55b2168 100644
--- a/pkgs/servers/monitoring/prometheus/keylight-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/keylight-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, nixosTests }:
+{ lib, buildGoModule, fetchFromGitHub, nixosTests }:
 
 buildGoModule rec {
   pname = "keylight-exporter";
diff --git a/pkgs/servers/monitoring/prometheus/lnd-exporter.nix b/pkgs/servers/monitoring/prometheus/lnd-exporter.nix
index 1f9c38922ebc..34a9511d0b57 100644
--- a/pkgs/servers/monitoring/prometheus/lnd-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/lnd-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, nixosTests }:
+{ lib, buildGoModule, fetchFromGitHub, nixosTests }:
 
 buildGoModule rec {
   pname = "lndmon";
diff --git a/pkgs/servers/monitoring/prometheus/mail-exporter.nix b/pkgs/servers/monitoring/prometheus/mail-exporter.nix
index daad5dc81cd8..2d995ba52932 100644
--- a/pkgs/servers/monitoring/prometheus/mail-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/mail-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, installShellFiles, nixosTests }:
+{ lib, buildGoModule, fetchFromGitHub, installShellFiles, nixosTests }:
 
 buildGoModule {
   pname = "mailexporter";
diff --git a/pkgs/servers/monitoring/prometheus/mesos-exporter.nix b/pkgs/servers/monitoring/prometheus/mesos-exporter.nix
index 0fb7ee4fce32..0fa2bced1255 100644
--- a/pkgs/servers/monitoring/prometheus/mesos-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/mesos-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "mesos_exporter";
diff --git a/pkgs/servers/monitoring/prometheus/mikrotik-exporter.nix b/pkgs/servers/monitoring/prometheus/mikrotik-exporter.nix
index 5044db4b1c14..37f9b0c4e06d 100644
--- a/pkgs/servers/monitoring/prometheus/mikrotik-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/mikrotik-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, nixosTests }:
+{ lib, buildGoModule, fetchFromGitHub, nixosTests }:
 
 buildGoModule rec {
   pname = "mikrotik-exporter-unstable";
diff --git a/pkgs/servers/monitoring/prometheus/minio-exporter/default.nix b/pkgs/servers/monitoring/prometheus/minio-exporter/default.nix
index 78642821b946..93e9bca3283d 100644
--- a/pkgs/servers/monitoring/prometheus/minio-exporter/default.nix
+++ b/pkgs/servers/monitoring/prometheus/minio-exporter/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, fetchpatch }:
+{ lib, buildGoPackage, fetchFromGitHub, fetchpatch }:
 
 buildGoPackage rec {
   pname = "minio-exporter";
diff --git a/pkgs/servers/monitoring/prometheus/modemmanager-exporter.nix b/pkgs/servers/monitoring/prometheus/modemmanager-exporter.nix
index c23d44dca389..e6178dd52a35 100644
--- a/pkgs/servers/monitoring/prometheus/modemmanager-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/modemmanager-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, nixosTests }:
+{ lib, buildGoModule, fetchFromGitHub, nixosTests }:
 
 buildGoModule rec {
   pname = "modemmanager-exporter";
diff --git a/pkgs/servers/monitoring/prometheus/mysqld-exporter.nix b/pkgs/servers/monitoring/prometheus/mysqld-exporter.nix
index ec181d2e1107..ff32764fcde6 100644
--- a/pkgs/servers/monitoring/prometheus/mysqld-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/mysqld-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "mysqld_exporter";
diff --git a/pkgs/servers/monitoring/prometheus/nginx-exporter.nix b/pkgs/servers/monitoring/prometheus/nginx-exporter.nix
index 259b4f752d37..ee5bafbc7c9f 100644
--- a/pkgs/servers/monitoring/prometheus/nginx-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/nginx-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, nixosTests }:
+{ lib, buildGoPackage, fetchFromGitHub, nixosTests }:
 
 buildGoPackage rec {
   pname = "nginx_exporter";
diff --git a/pkgs/servers/monitoring/prometheus/nginxlog-exporter.nix b/pkgs/servers/monitoring/prometheus/nginxlog-exporter.nix
index b15a54c6529c..fad49d275751 100644
--- a/pkgs/servers/monitoring/prometheus/nginxlog-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/nginxlog-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, nixosTests }:
+{ lib, buildGoModule, fetchFromGitHub, nixosTests }:
 
 buildGoModule rec {
   pname = "nginxlog_exporter";
diff --git a/pkgs/servers/monitoring/prometheus/node-exporter.nix b/pkgs/servers/monitoring/prometheus/node-exporter.nix
index e2b601f56c14..42ccb91017fc 100644
--- a/pkgs/servers/monitoring/prometheus/node-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/node-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, nixosTests }:
+{ lib, buildGoPackage, fetchFromGitHub, nixosTests }:
 
 buildGoPackage rec {
   pname = "node_exporter";
diff --git a/pkgs/servers/monitoring/prometheus/openvpn-exporter.nix b/pkgs/servers/monitoring/prometheus/openvpn-exporter.nix
index 8e3daa931ee8..021905ba9e00 100644
--- a/pkgs/servers/monitoring/prometheus/openvpn-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/openvpn-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "openvpn_exporter-unstable";
diff --git a/pkgs/servers/monitoring/prometheus/postfix-exporter.nix b/pkgs/servers/monitoring/prometheus/postfix-exporter.nix
index e3f8b2d44d4e..a24edd2fbb0d 100644
--- a/pkgs/servers/monitoring/prometheus/postfix-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/postfix-exporter.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub, makeWrapper, nixosTests
+{ lib, buildGoPackage, fetchFromGitHub, makeWrapper, nixosTests
 , systemd, withSystemdSupport ? true }:
 
 with lib;
diff --git a/pkgs/servers/monitoring/prometheus/process-exporter.nix b/pkgs/servers/monitoring/prometheus/process-exporter.nix
index 5a3c232ac85c..a147a3c29055 100644
--- a/pkgs/servers/monitoring/prometheus/process-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/process-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "process-exporter";
diff --git a/pkgs/servers/monitoring/prometheus/prom2json.nix b/pkgs/servers/monitoring/prometheus/prom2json.nix
index b333faf0bbdc..a370bf1f2488 100644
--- a/pkgs/servers/monitoring/prometheus/prom2json.nix
+++ b/pkgs/servers/monitoring/prometheus/prom2json.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "prom2json";
diff --git a/pkgs/servers/monitoring/prometheus/promscale.nix b/pkgs/servers/monitoring/prometheus/promscale.nix
index f4a9070fd84a..a4ba3cee620d 100644
--- a/pkgs/servers/monitoring/prometheus/promscale.nix
+++ b/pkgs/servers/monitoring/prometheus/promscale.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildGoModule
 , fetchFromGitHub
 }:
diff --git a/pkgs/servers/monitoring/prometheus/pushgateway.nix b/pkgs/servers/monitoring/prometheus/pushgateway.nix
index 0d47211005f2..aca2836e1a77 100644
--- a/pkgs/servers/monitoring/prometheus/pushgateway.nix
+++ b/pkgs/servers/monitoring/prometheus/pushgateway.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, go, buildGoPackage, fetchFromGitHub }:
+{ lib, go, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "pushgateway";
diff --git a/pkgs/servers/monitoring/prometheus/rabbitmq-exporter.nix b/pkgs/servers/monitoring/prometheus/rabbitmq-exporter.nix
index d9c08f8718dc..b7832395f626 100644
--- a/pkgs/servers/monitoring/prometheus/rabbitmq-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/rabbitmq-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "rabbitmq_exporter";
diff --git a/pkgs/servers/monitoring/prometheus/redis-exporter.nix b/pkgs/servers/monitoring/prometheus/redis-exporter.nix
index 945f403041c6..34c058d5d6cd 100644
--- a/pkgs/servers/monitoring/prometheus/redis-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/redis-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, nixosTests }:
+{ lib, buildGoPackage, fetchFromGitHub, nixosTests }:
 
 buildGoPackage rec {
   pname = "redis_exporter";
diff --git a/pkgs/servers/monitoring/prometheus/snmp-exporter.nix b/pkgs/servers/monitoring/prometheus/snmp-exporter.nix
index a71b03a2b41d..ece22e496d12 100644
--- a/pkgs/servers/monitoring/prometheus/snmp-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/snmp-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, net-snmp, nixosTests }:
+{ lib, buildGoPackage, fetchFromGitHub, net-snmp, nixosTests }:
 
 buildGoPackage rec {
   pname = "snmp_exporter";
diff --git a/pkgs/servers/monitoring/prometheus/sql-exporter.nix b/pkgs/servers/monitoring/prometheus/sql-exporter.nix
index 2784dae63aff..553613a9c7e9 100644
--- a/pkgs/servers/monitoring/prometheus/sql-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/sql-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, nixosTests }:
+{ lib, buildGoModule, fetchFromGitHub, nixosTests }:
 
 buildGoModule rec {
   pname = "sql_exporter";
diff --git a/pkgs/servers/monitoring/prometheus/statsd-exporter.nix b/pkgs/servers/monitoring/prometheus/statsd-exporter.nix
index a2b0f73904b9..31bd583280cc 100644
--- a/pkgs/servers/monitoring/prometheus/statsd-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/statsd-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "statsd_exporter";
diff --git a/pkgs/servers/monitoring/prometheus/surfboard-exporter.nix b/pkgs/servers/monitoring/prometheus/surfboard-exporter.nix
index 50915bf65f87..39e475df1974 100644
--- a/pkgs/servers/monitoring/prometheus/surfboard-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/surfboard-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, nixosTests }:
+{ lib, buildGoPackage, fetchFromGitHub, nixosTests }:
 
 buildGoPackage rec {
   pname = "surfboard_exporter";
diff --git a/pkgs/servers/monitoring/prometheus/unifi-exporter/default.nix b/pkgs/servers/monitoring/prometheus/unifi-exporter/default.nix
index 669cf8ffaeae..b9971ab72280 100644
--- a/pkgs/servers/monitoring/prometheus/unifi-exporter/default.nix
+++ b/pkgs/servers/monitoring/prometheus/unifi-exporter/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "unifi-exporter";
diff --git a/pkgs/servers/monitoring/thanos/default.nix b/pkgs/servers/monitoring/thanos/default.nix
index 9955b4a83330..755dc1517751 100644
--- a/pkgs/servers/monitoring/thanos/default.nix
+++ b/pkgs/servers/monitoring/thanos/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 buildGoModule rec {
   pname = "thanos";
   version = "0.17.2";
diff --git a/pkgs/servers/monitoring/unifi-poller/default.nix b/pkgs/servers/monitoring/unifi-poller/default.nix
index 0343384a6795..8297503b675e 100644
--- a/pkgs/servers/monitoring/unifi-poller/default.nix
+++ b/pkgs/servers/monitoring/unifi-poller/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "unifi-poller";
diff --git a/pkgs/servers/nextcloud/news-updater.nix b/pkgs/servers/nextcloud/news-updater.nix
index f4dc2d33d1b0..19147be3f5da 100644
--- a/pkgs/servers/nextcloud/news-updater.nix
+++ b/pkgs/servers/nextcloud/news-updater.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, python3Packages, php }:
+{ lib, fetchurl, python3Packages, php }:
 
 python3Packages.buildPythonApplication rec {
   name = "nextcloud-news-updater-${version}";
diff --git a/pkgs/servers/nginx-sso/default.nix b/pkgs/servers/nginx-sso/default.nix
index 0029d9ad55ee..572f4d94e72b 100644
--- a/pkgs/servers/nginx-sso/default.nix
+++ b/pkgs/servers/nginx-sso/default.nix
@@ -1,4 +1,4 @@
-{ buildGoPackage, fetchFromGitHub, lib, stdenv, nixosTests }:
+{ buildGoPackage, fetchFromGitHub, lib, nixosTests }:
 
 buildGoPackage rec {
   pname = "nginx-sso";
diff --git a/pkgs/servers/nosql/mongodb/v3_4.nix b/pkgs/servers/nosql/mongodb/v3_4.nix
index 2a33b9744a2a..666a92004b44 100644
--- a/pkgs/servers/nosql/mongodb/v3_4.nix
+++ b/pkgs/servers/nosql/mongodb/v3_4.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, lib, sasl, boost, Security, CoreFoundation, cctools }:
+{ callPackage, lib, sasl, boost, Security, CoreFoundation, cctools }:
 
 let
   buildMongoDB = callPackage ./mongodb.nix {
diff --git a/pkgs/servers/openxpki/default.nix b/pkgs/servers/openxpki/default.nix
index 511ea217328d..bdf12a1f923c 100644
--- a/pkgs/servers/openxpki/default.nix
+++ b/pkgs/servers/openxpki/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit, perl, openssl, perlPackages, gettext, python3Packages
+{ lib, fetchgit, perl, openssl, perlPackages, gettext, python3Packages
 # TODO: Remove extra dependencies once it is clear that they are NOT needed somewhere.
 , extraDependencies1 ? false, extraDependencies2 ? false, extraDependencies3 ? false }:
 
diff --git a/pkgs/servers/radicale/1.x.nix b/pkgs/servers/radicale/1.x.nix
index 3bfab658af6d..fafeda88975c 100644
--- a/pkgs/servers/radicale/1.x.nix
+++ b/pkgs/servers/radicale/1.x.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, pythonPackages }:
+{ lib, fetchurl, pythonPackages }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "radicale";
diff --git a/pkgs/servers/radicale/2.x.nix b/pkgs/servers/radicale/2.x.nix
index 918dad537a53..b0902feeead4 100644
--- a/pkgs/servers/radicale/2.x.nix
+++ b/pkgs/servers/radicale/2.x.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3 }:
+{ lib, fetchFromGitHub, python3 }:
 
 python3.pkgs.buildPythonApplication rec {
   pname = "Radicale";
diff --git a/pkgs/servers/routinator/default.nix b/pkgs/servers/routinator/default.nix
index e62ad9753806..4a19932f23e3 100644
--- a/pkgs/servers/routinator/default.nix
+++ b/pkgs/servers/routinator/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage rec {
   pname = "routinator";
diff --git a/pkgs/servers/rtsp-simple-server/default.nix b/pkgs/servers/rtsp-simple-server/default.nix
index d3ec7dc75ee6..cfc35e8528f7 100644
--- a/pkgs/servers/rtsp-simple-server/default.nix
+++ b/pkgs/servers/rtsp-simple-server/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , buildGoModule
 }:
diff --git a/pkgs/servers/scylladb/default.nix b/pkgs/servers/scylladb/default.nix
index ecc79acfbe73..2ae3d9f486fb 100644
--- a/pkgs/servers/scylladb/default.nix
+++ b/pkgs/servers/scylladb/default.nix
@@ -1,5 +1,5 @@
 {
-  lib, stdenv,
+  lib,
   fetchgit,
   python3Packages,
   pkg-config,
diff --git a/pkgs/servers/serf/default.nix b/pkgs/servers/serf/default.nix
index 04cd93c5306e..8964796862ce 100644
--- a/pkgs/servers/serf/default.nix
+++ b/pkgs/servers/serf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "serf";
diff --git a/pkgs/servers/sickbeard/sickrage.nix b/pkgs/servers/sickbeard/sickrage.nix
index 7bd971e86e75..43ba82caf768 100644
--- a/pkgs/servers/sickbeard/sickrage.nix
+++ b/pkgs/servers/sickbeard/sickrage.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python2, makeWrapper }:
+{ lib, fetchFromGitHub, python2, makeWrapper }:
 
 python2.pkgs.buildPythonApplication rec {
   pname = "sickrage";
diff --git a/pkgs/servers/simplehttp2server/default.nix b/pkgs/servers/simplehttp2server/default.nix
index bc56053515bf..d673a201646d 100644
--- a/pkgs/servers/simplehttp2server/default.nix
+++ b/pkgs/servers/simplehttp2server/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "simplehttp2server";
diff --git a/pkgs/servers/skydns/default.nix b/pkgs/servers/skydns/default.nix
index 587c5d4bda2c..e6f35124a6fc 100644
--- a/pkgs/servers/skydns/default.nix
+++ b/pkgs/servers/skydns/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "skydns";
diff --git a/pkgs/servers/slimserver/default.nix b/pkgs/servers/slimserver/default.nix
index 5e1e8544818a..3e28f5010499 100644
--- a/pkgs/servers/slimserver/default.nix
+++ b/pkgs/servers/slimserver/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, makeWrapper
+{ lib, fetchurl, makeWrapper
 , perlPackages, flac, faad2, sox, lame, monkeysAudio, wavpack }:
 
 perlPackages.buildPerlPackage rec {
diff --git a/pkgs/servers/sql/dolt/default.nix b/pkgs/servers/sql/dolt/default.nix
index b0dc7a227576..75d341e601e2 100644
--- a/pkgs/servers/sql/dolt/default.nix
+++ b/pkgs/servers/sql/dolt/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, lib, buildGoModule }:
+{ fetchFromGitHub, lib, buildGoModule }:
 
 buildGoModule rec {
     pname = "dolt";
diff --git a/pkgs/servers/tarssh/default.nix b/pkgs/servers/tarssh/default.nix
index bb353dda9289..9240b9c51a28 100644
--- a/pkgs/servers/tarssh/default.nix
+++ b/pkgs/servers/tarssh/default.nix
@@ -1,4 +1,4 @@
-{ fetchFromGitHub, rustPlatform, lib, stdenv }:
+{ fetchFromGitHub, rustPlatform, lib }:
 
 with rustPlatform;
 
diff --git a/pkgs/servers/tegola/default.nix b/pkgs/servers/tegola/default.nix
index c18bf17a7c7c..f2161d5d47ea 100644
--- a/pkgs/servers/tegola/default.nix
+++ b/pkgs/servers/tegola/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "tegola";
diff --git a/pkgs/servers/teleport/default.nix b/pkgs/servers/teleport/default.nix
index f89c8f96fcf2..0b55b82d39e7 100644
--- a/pkgs/servers/teleport/default.nix
+++ b/pkgs/servers/teleport/default.nix
@@ -1,5 +1,5 @@
 # This file was generated by https://github.com/kamilchm/go2nix v2.0-dev
-{ lib, stdenv, buildGoPackage, zip, fetchFromGitHub }:
+{ lib, buildGoPackage, zip, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "teleport";
diff --git a/pkgs/servers/traefik/default.nix b/pkgs/servers/traefik/default.nix
index 4ef454d6b561..340bad6bdc8a 100644
--- a/pkgs/servers/traefik/default.nix
+++ b/pkgs/servers/traefik/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchzip, buildGoModule, go-bindata, nixosTests }:
+{ lib, fetchzip, buildGoModule, go-bindata, nixosTests }:
 
 buildGoModule rec {
   pname = "traefik";
diff --git a/pkgs/servers/trezord/default.nix b/pkgs/servers/trezord/default.nix
index 03ff9f32fa51..cc0fb0d74217 100644
--- a/pkgs/servers/trezord/default.nix
+++ b/pkgs/servers/trezord/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildGoModule
 , fetchFromGitHub
 , trezor-udev-rules
diff --git a/pkgs/servers/trickster/trickster.nix b/pkgs/servers/trickster/trickster.nix
index b99375dbb3d0..5cf08ee6c3cf 100644
--- a/pkgs/servers/trickster/trickster.nix
+++ b/pkgs/servers/trickster/trickster.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "trickster";
diff --git a/pkgs/servers/tt-rss/plugin-ff-instagram/default.nix b/pkgs/servers/tt-rss/plugin-ff-instagram/default.nix
index 375726a4692e..1accac5bf6f8 100644
--- a/pkgs/servers/tt-rss/plugin-ff-instagram/default.nix
+++ b/pkgs/servers/tt-rss/plugin-ff-instagram/default.nix
@@ -1,4 +1,6 @@
-{ lib, stdenv, fetchFromGitHub, ... }: stdenv.mkDerivation {
+{ lib, stdenv, fetchFromGitHub, ... }:
+
+stdenv.mkDerivation {
   pname = "tt-rss-plugin-ff-instagram";
   version = "git-2019-01-10"; # No release, see https://github.com/wltb/ff_instagram/issues/6
 
diff --git a/pkgs/servers/tt-rss/plugin-tumblr-gdpr/default.nix b/pkgs/servers/tt-rss/plugin-tumblr-gdpr/default.nix
index 987a6d8aaa67..7df8b7175936 100644
--- a/pkgs/servers/tt-rss/plugin-tumblr-gdpr/default.nix
+++ b/pkgs/servers/tt-rss/plugin-tumblr-gdpr/default.nix
@@ -1,4 +1,6 @@
-{ lib, stdenv, fetchFromGitHub, ... }: stdenv.mkDerivation rec {
+{ lib, stdenv, fetchFromGitHub, ... }:
+
+stdenv.mkDerivation rec {
   pname = "tt-rss-plugin-tumblr-gdpr";
   version = "2.1";
 
diff --git a/pkgs/servers/tt-rss/theme-feedly/default.nix b/pkgs/servers/tt-rss/theme-feedly/default.nix
index 41f47ca4a4ec..f6882611a25b 100644
--- a/pkgs/servers/tt-rss/theme-feedly/default.nix
+++ b/pkgs/servers/tt-rss/theme-feedly/default.nix
@@ -1,4 +1,6 @@
-{ lib, stdenv, fetchFromGitHub }: stdenv.mkDerivation rec {
+{ lib, stdenv, fetchFromGitHub }:
+
+stdenv.mkDerivation rec {
   pname = "tt-rss-theme-feedly";
   version = "2.5.0";
 
diff --git a/pkgs/servers/udpt/default.nix b/pkgs/servers/udpt/default.nix
index acdfb95272a7..b681727c08f9 100644
--- a/pkgs/servers/udpt/default.nix
+++ b/pkgs/servers/udpt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, rustPlatform, fetchFromGitHub }:
+{ lib, rustPlatform, fetchFromGitHub }:
 
 rustPlatform.buildRustPackage rec {
   pname = "udpt";
diff --git a/pkgs/servers/unpfs/default.nix b/pkgs/servers/unpfs/default.nix
index 818e92f05965..07342c3edbef 100644
--- a/pkgs/servers/unpfs/default.nix
+++ b/pkgs/servers/unpfs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage rec {
   pname = "unpfs";
diff --git a/pkgs/servers/web-apps/morty/default.nix b/pkgs/servers/web-apps/morty/default.nix
index 6b17476623b9..04f1e14d5ccf 100644
--- a/pkgs/servers/web-apps/morty/default.nix
+++ b/pkgs/servers/web-apps/morty/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   pname = "morty";
diff --git a/pkgs/servers/web-apps/shiori/default.nix b/pkgs/servers/web-apps/shiori/default.nix
index 7100c70c0ed8..b39d7a00cedc 100644
--- a/pkgs/servers/web-apps/shiori/default.nix
+++ b/pkgs/servers/web-apps/shiori/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "shiori";
diff --git a/pkgs/servers/webmetro/default.nix b/pkgs/servers/webmetro/default.nix
index 316e3a524972..6bda15a93e00 100644
--- a/pkgs/servers/webmetro/default.nix
+++ b/pkgs/servers/webmetro/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage rec {
   pname = "webmetro";
diff --git a/pkgs/servers/x11/xorg/xwayland.nix b/pkgs/servers/x11/xorg/xwayland.nix
index 7fe0e5a9f97f..e3d2698e8303 100644
--- a/pkgs/servers/x11/xorg/xwayland.nix
+++ b/pkgs/servers/x11/xorg/xwayland.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, wayland, wayland-protocols, xorgserver, xkbcomp, xkeyboard_config
+{ lib, wayland, wayland-protocols, xorgserver, xkbcomp, xkeyboard_config
 , epoxy, libxslt, libunwind, makeWrapper, egl-wayland
 , defaultFontPath ? "" }:
 
diff --git a/pkgs/servers/xandikos/default.nix b/pkgs/servers/xandikos/default.nix
index b8eb29d87b2d..5241139cfa39 100644
--- a/pkgs/servers/xandikos/default.nix
+++ b/pkgs/servers/xandikos/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , python3Packages
 , installShellFiles
diff --git a/pkgs/servers/zigbee2mqtt/default.nix b/pkgs/servers/zigbee2mqtt/default.nix
index 550e93fb5aa3..85465fd7d145 100644
--- a/pkgs/servers/zigbee2mqtt/default.nix
+++ b/pkgs/servers/zigbee2mqtt/default.nix
@@ -1,4 +1,4 @@
-{ pkgs, stdenv, system, dataDir ? "/opt/zigbee2mqtt/data", nixosTests }:
+{ pkgs, system, dataDir ? "/opt/zigbee2mqtt/data", nixosTests }:
 let
   package = (import ./node.nix { inherit pkgs system; }).package;
 in
diff --git a/pkgs/shells/elvish/default.nix b/pkgs/shells/elvish/default.nix
index 938029e9af97..82a15edcb263 100644
--- a/pkgs/shells/elvish/default.nix
+++ b/pkgs/shells/elvish/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "elvish";
diff --git a/pkgs/shells/fish/babelfish.nix b/pkgs/shells/fish/babelfish.nix
index c23e0b1ca923..368c88aa1bbf 100644
--- a/pkgs/shells/fish/babelfish.nix
+++ b/pkgs/shells/fish/babelfish.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 buildGoModule rec {
   pname = "babelfish";
   version = "1.0.1";
diff --git a/pkgs/shells/oh/default.nix b/pkgs/shells/oh/default.nix
index 3ea41d7f4728..33e71358b4d5 100644
--- a/pkgs/shells/oh/default.nix
+++ b/pkgs/shells/oh/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildGoPackage, fetchgit, lib }:
+{ buildGoPackage, fetchgit, lib }:
 
 buildGoPackage rec {
   pname = "oh";
diff --git a/pkgs/shells/pash/default.nix b/pkgs/shells/pash/default.nix
index 8b2ac3629598..c7c6e4e5a7d4 100644
--- a/pkgs/shells/pash/default.nix
+++ b/pkgs/shells/pash/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildDotnetPackage }:
+{ lib, fetchFromGitHub, buildDotnetPackage }:
 
 buildDotnetPackage {
   baseName = "pash";
diff --git a/pkgs/shells/zsh/zsh-git-prompt/default.nix b/pkgs/shells/zsh/zsh-git-prompt/default.nix
index c0c56570b46d..7fb2d7861937 100644
--- a/pkgs/shells/zsh/zsh-git-prompt/default.nix
+++ b/pkgs/shells/zsh/zsh-git-prompt/default.nix
@@ -32,7 +32,7 @@
 }:
 
 haskellPackages.callPackage
-  ({ mkDerivation, base, HUnit, parsec, process, QuickCheck, stdenv }:
+  ({ mkDerivation, base, HUnit, parsec, process, QuickCheck }:
    mkDerivation rec {
      pname = "zsh-git-prompt";
      version = "0.4z";  # While we await a real 0.5 release.
diff --git a/pkgs/test/haskell-shellFor/default.nix b/pkgs/test/haskell-shellFor/default.nix
index 05d09d6f39cf..9d13e1112cc1 100644
--- a/pkgs/test/haskell-shellFor/default.nix
+++ b/pkgs/test/haskell-shellFor/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, haskellPackages, cabal-install }:
+{ lib, haskellPackages, cabal-install }:
 
 (haskellPackages.shellFor {
   packages = p: [ p.database-id-class p.constraints ];
diff --git a/pkgs/test/install-shell-files/default.nix b/pkgs/test/install-shell-files/default.nix
index e9d32e4ccf69..aef5acc1de6b 100644
--- a/pkgs/test/install-shell-files/default.nix
+++ b/pkgs/test/install-shell-files/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, runCommandLocal, recurseIntoAttrs, installShellFiles }:
+{ lib, runCommandLocal, recurseIntoAttrs, installShellFiles }:
 
 let
   runTest = name: env: buildCommand:
diff --git a/pkgs/tools/X11/arandr/default.nix b/pkgs/tools/X11/arandr/default.nix
index 00296bc54af7..e6f4b5f6ff19 100644
--- a/pkgs/tools/X11/arandr/default.nix
+++ b/pkgs/tools/X11/arandr/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, python3Packages
+{ lib, fetchurl, python3Packages
 , gobject-introspection, gsettings-desktop-schemas, gtk3
 , wrapGAppsHook, xrandr
 }:
diff --git a/pkgs/tools/X11/go-sct/default.nix b/pkgs/tools/X11/go-sct/default.nix
index 2d6965567b7a..8744c493b71c 100644
--- a/pkgs/tools/X11/go-sct/default.nix
+++ b/pkgs/tools/X11/go-sct/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, xorg, buildGoPackage, fetchFromGitHub }:
+{ lib, xorg, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "go-sct";
diff --git a/pkgs/tools/X11/grobi/default.nix b/pkgs/tools/X11/grobi/default.nix
index 1ebd8ccc4e4c..3071ef317814 100644
--- a/pkgs/tools/X11/grobi/default.nix
+++ b/pkgs/tools/X11/grobi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoModule, fetchpatch }:
+{ lib, fetchFromGitHub, buildGoModule, fetchpatch }:
 
 buildGoModule rec {
   version = "0.6.0";
diff --git a/pkgs/tools/X11/wpgtk/default.nix b/pkgs/tools/X11/wpgtk/default.nix
index f2864ca2eb5a..cf9bbd9bb988 100644
--- a/pkgs/tools/X11/wpgtk/default.nix
+++ b/pkgs/tools/X11/wpgtk/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, fetchFromGitHub, libxslt,
+{ lib, python3Packages, fetchFromGitHub, libxslt,
   gobject-introspection, gtk3, wrapGAppsHook, gnome3 }:
 
 python3Packages.buildPythonApplication rec {
diff --git a/pkgs/tools/X11/xpra/default.nix b/pkgs/tools/X11/xpra/default.nix
index 0c1accd36fbd..0dffdf7bbf79 100644
--- a/pkgs/tools/X11/xpra/default.nix
+++ b/pkgs/tools/X11/xpra/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchurl, callPackage, substituteAll, python3, pkg-config, writeText
+{ lib, fetchurl, callPackage, substituteAll, python3, pkg-config, writeText
 , xorg, gtk3, glib, pango, cairo, gdk-pixbuf, atk
 , wrapGAppsHook, xorgserver, getopt, xauth, util-linux, which
 , ffmpeg, x264, libvpx, libwebp, x265
diff --git a/pkgs/tools/admin/afterburn/default.nix b/pkgs/tools/admin/afterburn/default.nix
index 0d3cd957324b..8a42a011da90 100644
--- a/pkgs/tools/admin/afterburn/default.nix
+++ b/pkgs/tools/admin/afterburn/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, openssl, pkg-config, fetchFromGitHub, rustPlatform }:
+{ lib, openssl, pkg-config, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage rec {
   pname = "afterburn";
diff --git a/pkgs/tools/admin/aws-nuke/default.nix b/pkgs/tools/admin/aws-nuke/default.nix
index 32c006d7a5ff..070a9b6430ca 100644
--- a/pkgs/tools/admin/aws-nuke/default.nix
+++ b/pkgs/tools/admin/aws-nuke/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildGoModule
 , fetchFromGitHub
 }:
diff --git a/pkgs/tools/admin/aws-rotate-key/default.nix b/pkgs/tools/admin/aws-rotate-key/default.nix
index 4b26e3a74344..82b577391201 100644
--- a/pkgs/tools/admin/aws-rotate-key/default.nix
+++ b/pkgs/tools/admin/aws-rotate-key/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "aws-rotate-key";
diff --git a/pkgs/tools/admin/awslogs/default.nix b/pkgs/tools/admin/awslogs/default.nix
index f71422f77a25..3e2cf1505579 100644
--- a/pkgs/tools/admin/awslogs/default.nix
+++ b/pkgs/tools/admin/awslogs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   pname = "awslogs";
diff --git a/pkgs/tools/admin/berglas/default.nix b/pkgs/tools/admin/berglas/default.nix
index ca588db01a59..8a6bb559041b 100644
--- a/pkgs/tools/admin/berglas/default.nix
+++ b/pkgs/tools/admin/berglas/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "berglas";
diff --git a/pkgs/tools/admin/certigo/default.nix b/pkgs/tools/admin/certigo/default.nix
index ff66e926d4b5..422c6da82d2f 100644
--- a/pkgs/tools/admin/certigo/default.nix
+++ b/pkgs/tools/admin/certigo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "certigo";
diff --git a/pkgs/tools/admin/chkcrontab/default.nix b/pkgs/tools/admin/chkcrontab/default.nix
index 6404eb92a26e..bbf8d7eaeb1c 100644
--- a/pkgs/tools/admin/chkcrontab/default.nix
+++ b/pkgs/tools/admin/chkcrontab/default.nix
@@ -1,4 +1,4 @@
-{ python, lib, stdenv }:
+{ python, lib }:
 
 with python.pkgs;
 
diff --git a/pkgs/tools/admin/credhub-cli/default.nix b/pkgs/tools/admin/credhub-cli/default.nix
index 2a1ceb531a50..55af1679d7ad 100644
--- a/pkgs/tools/admin/credhub-cli/default.nix
+++ b/pkgs/tools/admin/credhub-cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "credhub-cli";
diff --git a/pkgs/tools/admin/docker-credential-gcr/default.nix b/pkgs/tools/admin/docker-credential-gcr/default.nix
index 2ca0f2c4d084..7fb128caa19b 100644
--- a/pkgs/tools/admin/docker-credential-gcr/default.nix
+++ b/pkgs/tools/admin/docker-credential-gcr/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "docker-credential-gcr";
diff --git a/pkgs/tools/admin/exoscale-cli/default.nix b/pkgs/tools/admin/exoscale-cli/default.nix
index 3fe3856d9c51..8913bed39d51 100644
--- a/pkgs/tools/admin/exoscale-cli/default.nix
+++ b/pkgs/tools/admin/exoscale-cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "exoscale-cli";
diff --git a/pkgs/tools/admin/iamy/default.nix b/pkgs/tools/admin/iamy/default.nix
index e7481e16948f..dd35da451ad8 100644
--- a/pkgs/tools/admin/iamy/default.nix
+++ b/pkgs/tools/admin/iamy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "iamy";
diff --git a/pkgs/tools/admin/lxd/default.nix b/pkgs/tools/admin/lxd/default.nix
index aeff0d931f05..1c263a1969d1 100644
--- a/pkgs/tools/admin/lxd/default.nix
+++ b/pkgs/tools/admin/lxd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, hwdata, pkg-config, lxc, buildGoPackage, fetchurl
+{ lib, hwdata, pkg-config, lxc, buildGoPackage, fetchurl
 , makeWrapper, acl, rsync, gnutar, xz, btrfs-progs, gzip, dnsmasq
 , squashfsTools, iproute, iptables, ebtables, iptables-nftables-compat, libcap
 , libco-canonical, dqlite, raft-canonical, sqlite-replication, udev
diff --git a/pkgs/tools/admin/s3bro/default.nix b/pkgs/tools/admin/s3bro/default.nix
index bf807d149975..35cf7b11e645 100644
--- a/pkgs/tools/admin/s3bro/default.nix
+++ b/pkgs/tools/admin/s3bro/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages }:
+{ lib, python3Packages }:
 
 python3Packages.buildPythonPackage rec {
   pname = "s3bro";
diff --git a/pkgs/tools/admin/scaleway-cli/default.nix b/pkgs/tools/admin/scaleway-cli/default.nix
index 0aeccb755a1b..2a8f0d1f1148 100644
--- a/pkgs/tools/admin/scaleway-cli/default.nix
+++ b/pkgs/tools/admin/scaleway-cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoPackage }:
+{ lib, fetchFromGitHub, buildGoPackage }:
 
 buildGoPackage rec {
   pname = "scaleway-cli";
diff --git a/pkgs/tools/admin/sewer/default.nix b/pkgs/tools/admin/sewer/default.nix
index 42288bafe015..a6f511fe115a 100644
--- a/pkgs/tools/admin/sewer/default.nix
+++ b/pkgs/tools/admin/sewer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages }:
+{ lib, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   pname = "sewer";
diff --git a/pkgs/tools/admin/simp_le/default.nix b/pkgs/tools/admin/simp_le/default.nix
index fc064641943a..5bfc00ac0001 100644
--- a/pkgs/tools/admin/simp_le/default.nix
+++ b/pkgs/tools/admin/simp_le/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, bash }:
+{ lib, python3Packages, bash }:
 
 python3Packages.buildPythonApplication rec {
   pname = "simp_le-client";
diff --git a/pkgs/tools/admin/ssh-import-id/default.nix b/pkgs/tools/admin/ssh-import-id/default.nix
index 6c8520648ec6..b6ca3135f561 100644
--- a/pkgs/tools/admin/ssh-import-id/default.nix
+++ b/pkgs/tools/admin/ssh-import-id/default.nix
@@ -1,5 +1,5 @@
 { buildPythonPackage
-, lib, stdenv
+, lib
 , fetchgit
 , requests
 , makeWrapper
diff --git a/pkgs/tools/admin/ssmsh/default.nix b/pkgs/tools/admin/ssmsh/default.nix
index 6b0d03809015..8ed8b0b812b0 100644
--- a/pkgs/tools/admin/ssmsh/default.nix
+++ b/pkgs/tools/admin/ssmsh/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "ssmsh";
diff --git a/pkgs/tools/admin/stripe-cli/default.nix b/pkgs/tools/admin/stripe-cli/default.nix
index c410bd81e89a..309bf4803fb6 100644
--- a/pkgs/tools/admin/stripe-cli/default.nix
+++ b/pkgs/tools/admin/stripe-cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "stripe-cli";
diff --git a/pkgs/tools/audio/beets/plugins/alternatives.nix b/pkgs/tools/audio/beets/plugins/alternatives.nix
index a64cc5ebcada..793611699ec8 100644
--- a/pkgs/tools/audio/beets/plugins/alternatives.nix
+++ b/pkgs/tools/audio/beets/plugins/alternatives.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, beets, pythonPackages }:
+{ fetchFromGitHub, beets, pythonPackages }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "beets-alternatives";
diff --git a/pkgs/tools/audio/beets/plugins/check.nix b/pkgs/tools/audio/beets/plugins/check.nix
index 545e6d7cf2c7..441dcfe579f4 100644
--- a/pkgs/tools/audio/beets/plugins/check.nix
+++ b/pkgs/tools/audio/beets/plugins/check.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, beets, pythonPackages, flac, liboggz, mp3val }:
+{ lib, fetchFromGitHub, beets, pythonPackages, flac, liboggz, mp3val }:
 
 pythonPackages.buildPythonApplication rec {
   name = "beets-check";
diff --git a/pkgs/tools/audio/beets/plugins/copyartifacts.nix b/pkgs/tools/audio/beets/plugins/copyartifacts.nix
index b339bc34ad20..5af52066caa7 100644
--- a/pkgs/tools/audio/beets/plugins/copyartifacts.nix
+++ b/pkgs/tools/audio/beets/plugins/copyartifacts.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, beets, pythonPackages, glibcLocales }:
+{ fetchFromGitHub, beets, pythonPackages, glibcLocales }:
 
 pythonPackages.buildPythonApplication {
   name = "beets-copyartifacts";
diff --git a/pkgs/tools/audio/mididings/default.nix b/pkgs/tools/audio/mididings/default.nix
index eedfd2f3dbbe..d5f78ada91c7 100644
--- a/pkgs/tools/audio/mididings/default.nix
+++ b/pkgs/tools/audio/mididings/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, pythonPackages, fetchFromGitHub, pkg-config, glib, alsaLib, libjack2  }:
+{ lib, pythonPackages, fetchFromGitHub, pkg-config, glib, alsaLib, libjack2  }:
 
 pythonPackages.buildPythonApplication {
   version = "2015-11-17";
diff --git a/pkgs/tools/audio/mpd-mpris/default.nix b/pkgs/tools/audio/mpd-mpris/default.nix
index 801058e0496b..af4000dfa448 100644
--- a/pkgs/tools/audio/mpd-mpris/default.nix
+++ b/pkgs/tools/audio/mpd-mpris/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "mpd-mpris";
diff --git a/pkgs/tools/audio/mpdris2/default.nix b/pkgs/tools/audio/mpdris2/default.nix
index 30b0d90f5623..4cd3921fb550 100644
--- a/pkgs/tools/audio/mpdris2/default.nix
+++ b/pkgs/tools/audio/mpdris2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , autoreconfHook
 , fetchFromGitHub
 , glib
diff --git a/pkgs/tools/audio/opl3bankeditor/default.nix b/pkgs/tools/audio/opl3bankeditor/default.nix
index c79204cffa2a..48f553d960dc 100644
--- a/pkgs/tools/audio/opl3bankeditor/default.nix
+++ b/pkgs/tools/audio/opl3bankeditor/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, cmake, qttools, alsaLib }:
+{ lib, mkDerivation, fetchFromGitHub, cmake, qttools, alsaLib }:
 
 mkDerivation rec {
   version = "1.5.1";
diff --git a/pkgs/tools/audio/video2midi/default.nix b/pkgs/tools/audio/video2midi/default.nix
index 3ce76fb61fae..4eafd7f52e1f 100644
--- a/pkgs/tools/audio/video2midi/default.nix
+++ b/pkgs/tools/audio/video2midi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, pythonPackages, opencv3 }:
+{ lib, fetchFromGitHub, pythonPackages, opencv3 }:
 
 let
   opencv3_ = pythonPackages.toPythonModule (opencv3.override {
diff --git a/pkgs/tools/audio/volctl/default.nix b/pkgs/tools/audio/volctl/default.nix
index 06b6079bde24..d05257f1d083 100644
--- a/pkgs/tools/audio/volctl/default.nix
+++ b/pkgs/tools/audio/volctl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, fetchFromGitHub, wrapGAppsHook, gobject-introspection, libpulseaudio, glib, gtk3, pango, xorg }:
+{ lib, python3Packages, fetchFromGitHub, wrapGAppsHook, gobject-introspection, libpulseaudio, glib, gtk3, pango, xorg }:
 
 python3Packages.buildPythonApplication rec {
   pname = "volctl";
diff --git a/pkgs/tools/backup/bupstash/default.nix b/pkgs/tools/backup/bupstash/default.nix
index 76a3d674ecbf..9ed70491fb32 100644
--- a/pkgs/tools/backup/bupstash/default.nix
+++ b/pkgs/tools/backup/bupstash/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, installShellFiles, rustPlatform, ronn, pkg-config, libsodium }:
+{ lib, fetchFromGitHub, installShellFiles, rustPlatform, ronn, pkg-config, libsodium }:
 rustPlatform.buildRustPackage rec {
   pname = "bupstash";
   version = "0.6.4";
diff --git a/pkgs/tools/backup/diskrsync/default.nix b/pkgs/tools/backup/diskrsync/default.nix
index d70efa1d2248..3b5d901daf0c 100644
--- a/pkgs/tools/backup/diskrsync/default.nix
+++ b/pkgs/tools/backup/diskrsync/default.nix
@@ -1,4 +1,4 @@
-{ buildGoPackage, fetchFromGitHub, lib, stdenv, openssh, makeWrapper }:
+{ buildGoPackage, fetchFromGitHub, lib, openssh, makeWrapper }:
 
 buildGoPackage rec {
   pname = "diskrsync";
diff --git a/pkgs/tools/backup/grab-site/default.nix b/pkgs/tools/backup/grab-site/default.nix
index 2ef3b5f54209..2f2f01356b47 100644
--- a/pkgs/tools/backup/grab-site/default.nix
+++ b/pkgs/tools/backup/grab-site/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python37, fetchFromGitHub }:
+{ lib, python37, fetchFromGitHub }:
 let
   python = python37.override {
     self = python;
diff --git a/pkgs/tools/backup/httrack/qt.nix b/pkgs/tools/backup/httrack/qt.nix
index 736dfdb557d9..2a7c4ff51768 100644
--- a/pkgs/tools/backup/httrack/qt.nix
+++ b/pkgs/tools/backup/httrack/qt.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchurl, cmake, pkg-config, makeWrapper
+{ mkDerivation, lib, fetchurl, cmake, pkg-config, makeWrapper
 , httrack, qtbase, qtmultimedia }:
 
 mkDerivation rec {
diff --git a/pkgs/tools/backup/iceshelf/default.nix b/pkgs/tools/backup/iceshelf/default.nix
index eb5e883bdacf..c066cb766951 100644
--- a/pkgs/tools/backup/iceshelf/default.nix
+++ b/pkgs/tools/backup/iceshelf/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, git, awscli, python3 }:
+{ lib, fetchFromGitHub, git, awscli, python3 }:
 
 python3.pkgs.buildPythonApplication rec {
   pname = "iceshelf";
diff --git a/pkgs/tools/backup/luckybackup/default.nix b/pkgs/tools/backup/luckybackup/default.nix
index 5a67bea41ea6..a8f88e88b0e2 100644
--- a/pkgs/tools/backup/luckybackup/default.nix
+++ b/pkgs/tools/backup/luckybackup/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchurl
+{ mkDerivation, lib, fetchurl
 , pkg-config, libtool, qmake
 , rsync, ssh
 }:
diff --git a/pkgs/tools/backup/rdiff-backup/default.nix b/pkgs/tools/backup/rdiff-backup/default.nix
index f55f163dafb0..0d24e3df7206 100644
--- a/pkgs/tools/backup/rdiff-backup/default.nix
+++ b/pkgs/tools/backup/rdiff-backup/default.nix
@@ -1,4 +1,4 @@
-{lib, stdenv, fetchurl, python2Packages, librsync, gnused }:
+{lib, fetchurl, python2Packages, librsync, gnused }:
 
 python2Packages.buildPythonApplication {
   name = "rdiff-backup-1.3.3";
diff --git a/pkgs/tools/backup/s3ql/default.nix b/pkgs/tools/backup/s3ql/default.nix
index 74b90236c4e9..70394afb50e4 100644
--- a/pkgs/tools/backup/s3ql/default.nix
+++ b/pkgs/tools/backup/s3ql/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages, sqlite, which }:
+{ lib, fetchFromGitHub, python3Packages, sqlite, which }:
 
 python3Packages.buildPythonApplication rec {
   pname = "s3ql";
diff --git a/pkgs/tools/backup/ugarit-manifest-maker/default.nix b/pkgs/tools/backup/ugarit-manifest-maker/default.nix
index 99ddd62e6ae2..8c37a7b72ac7 100644
--- a/pkgs/tools/backup/ugarit-manifest-maker/default.nix
+++ b/pkgs/tools/backup/ugarit-manifest-maker/default.nix
@@ -1,4 +1,4 @@
-{ pkgs, lib, stdenv, eggDerivation, fetchegg }:
+{ pkgs, lib, eggDerivation, fetchegg }:
 let
   eggs = import ./eggs.nix { inherit eggDerivation fetchegg; };
 in with pkgs; eggDerivation rec {
diff --git a/pkgs/tools/backup/ugarit/default.nix b/pkgs/tools/backup/ugarit/default.nix
index 938c24f38ce1..39c11cc0c91a 100644
--- a/pkgs/tools/backup/ugarit/default.nix
+++ b/pkgs/tools/backup/ugarit/default.nix
@@ -1,4 +1,4 @@
-{ pkgs, lib, stdenv, eggDerivation, fetchegg }:
+{ pkgs, lib, eggDerivation, fetchegg }:
 let
   eggs = import ./eggs.nix { inherit eggDerivation fetchegg; };
 in with pkgs; eggDerivation rec {
diff --git a/pkgs/tools/backup/wal-e/default.nix b/pkgs/tools/backup/wal-e/default.nix
index 0ed2bf1bf8bf..8e54b58e2017 100644
--- a/pkgs/tools/backup/wal-e/default.nix
+++ b/pkgs/tools/backup/wal-e/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, python3Packages, lzop, postgresql, pv }:
+{ lib, fetchurl, python3Packages, lzop, postgresql, pv }:
 
 python3Packages.buildPythonApplication rec {
   pname = "wal-e";
diff --git a/pkgs/tools/backup/zfs-replicate/default.nix b/pkgs/tools/backup/zfs-replicate/default.nix
index 02e3c19f0046..c167ad1fa018 100644
--- a/pkgs/tools/backup/zfs-replicate/default.nix
+++ b/pkgs/tools/backup/zfs-replicate/default.nix
@@ -1,5 +1,5 @@
 { buildPythonApplication, click, fetchPypi, hypothesis, mypy, pytest
-, pytestcov, pytestrunner, lib, stdenv, stringcase
+, pytestcov, pytestrunner, lib, stringcase
 }:
 
 buildPythonApplication rec {
diff --git a/pkgs/tools/cd-dvd/isolyzer/default.nix b/pkgs/tools/cd-dvd/isolyzer/default.nix
index 477fa337da84..c175eb45aa0d 100644
--- a/pkgs/tools/cd-dvd/isolyzer/default.nix
+++ b/pkgs/tools/cd-dvd/isolyzer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , python3
 , fetchFromGitHub
 }:
diff --git a/pkgs/tools/compression/dtrx/default.nix b/pkgs/tools/compression/dtrx/default.nix
index 0abea9b12854..91d59a4de0f8 100644
--- a/pkgs/tools/compression/dtrx/default.nix
+++ b/pkgs/tools/compression/dtrx/default.nix
@@ -1,4 +1,4 @@
-{stdenv, lib, fetchurl, pythonPackages
+{ lib, fetchurl, pythonPackages
 , gnutar, unzip, lhasa, rpm, binutils, cpio, gzip, p7zip, cabextract, unrar, unshield
 , bzip2, xz, lzip
 # unzip is handled by p7zip
diff --git a/pkgs/tools/filesystems/android-file-transfer/default.nix b/pkgs/tools/filesystems/android-file-transfer/default.nix
index 68199a0938eb..f0efaaa32316 100644
--- a/pkgs/tools/filesystems/android-file-transfer/default.nix
+++ b/pkgs/tools/filesystems/android-file-transfer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, cmake, fuse, readline, pkg-config, qtbase, qttools }:
+{ lib, mkDerivation, fetchFromGitHub, cmake, fuse, readline, pkg-config, qtbase, qttools }:
 
 mkDerivation rec {
   pname = "android-file-transfer";
diff --git a/pkgs/tools/filesystems/catcli/default.nix b/pkgs/tools/filesystems/catcli/default.nix
index 8f4e9941029b..2f179a151d1e 100644
--- a/pkgs/tools/filesystems/catcli/default.nix
+++ b/pkgs/tools/filesystems/catcli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , buildPythonApplication
 , docopt, anytree
diff --git a/pkgs/tools/filesystems/convoy/default.nix b/pkgs/tools/filesystems/convoy/default.nix
index 4c493ea22527..774568fdde17 100644
--- a/pkgs/tools/filesystems/convoy/default.nix
+++ b/pkgs/tools/filesystems/convoy/default.nix
@@ -1,5 +1,5 @@
 # This file was generated by go2nix.
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, lvm2 }:
+{ lib, buildGoPackage, fetchFromGitHub, lvm2 }:
 
 buildGoPackage rec {
   pname = "convoy";
diff --git a/pkgs/tools/filesystems/gitfs/default.nix b/pkgs/tools/filesystems/gitfs/default.nix
index 1d1863ede968..e4a120264fd8 100644
--- a/pkgs/tools/filesystems/gitfs/default.nix
+++ b/pkgs/tools/filesystems/gitfs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   pname = "gitfs";
diff --git a/pkgs/tools/filesystems/gocryptfs/default.nix b/pkgs/tools/filesystems/gocryptfs/default.nix
index 318e39e8322e..b8b330c129a0 100644
--- a/pkgs/tools/filesystems/gocryptfs/default.nix
+++ b/pkgs/tools/filesystems/gocryptfs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildGoModule
 , fetchFromGitHub
 , openssl
diff --git a/pkgs/tools/filesystems/nixpart/default.nix b/pkgs/tools/filesystems/nixpart/default.nix
index 3a63ad9747fe..80ae8ca2b3cd 100644
--- a/pkgs/tools/filesystems/nixpart/default.nix
+++ b/pkgs/tools/filesystems/nixpart/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, buildPythonApplication, blivet }:
+{ lib, fetchurl, buildPythonApplication, blivet }:
 
 buildPythonApplication rec {
   pname = "nixpart";
diff --git a/pkgs/tools/filesystems/sandboxfs/default.nix b/pkgs/tools/filesystems/sandboxfs/default.nix
index 8777fa50a5d8..32d186344dd7 100644
--- a/pkgs/tools/filesystems/sandboxfs/default.nix
+++ b/pkgs/tools/filesystems/sandboxfs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , rustPlatform
 , fuse
diff --git a/pkgs/tools/filesystems/tmsu/default.nix b/pkgs/tools/filesystems/tmsu/default.nix
index 7129de950136..1eac3e03ec92 100644
--- a/pkgs/tools/filesystems/tmsu/default.nix
+++ b/pkgs/tools/filesystems/tmsu/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, fuse, installShellFiles }:
+{ lib, buildGoPackage, fetchFromGitHub, fuse, installShellFiles }:
 
 buildGoPackage rec {
   pname = "tmsu";
diff --git a/pkgs/tools/filesystems/ubidump/default.nix b/pkgs/tools/filesystems/ubidump/default.nix
index 2787b87964fd..6a6409ad3251 100644
--- a/pkgs/tools/filesystems/ubidump/default.nix
+++ b/pkgs/tools/filesystems/ubidump/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3, makeWrapper }:
+{ lib, fetchFromGitHub, python3, makeWrapper }:
 
 python3.pkgs.buildPythonApplication rec {
 
diff --git a/pkgs/tools/graphics/feedgnuplot/default.nix b/pkgs/tools/graphics/feedgnuplot/default.nix
index 1fe254d77857..02bb022dfb47 100644
--- a/pkgs/tools/graphics/feedgnuplot/default.nix
+++ b/pkgs/tools/graphics/feedgnuplot/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, makeWrapper, gawk
+{ lib, fetchFromGitHub, makeWrapper, gawk
 , makeFontsConf, freefont_ttf, gnuplot, perl, perlPackages
 }:
 
diff --git a/pkgs/tools/graphics/gifski/default.nix b/pkgs/tools/graphics/gifski/default.nix
index 0ce24482164e..95af281d7eab 100644
--- a/pkgs/tools/graphics/gifski/default.nix
+++ b/pkgs/tools/graphics/gifski/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, rustPlatform, fetchFromGitHub, pkg-config }:
+{ lib, rustPlatform, fetchFromGitHub, pkg-config }:
 
 rustPlatform.buildRustPackage rec {
   pname = "gifski";
diff --git a/pkgs/tools/graphics/graph-easy/default.nix b/pkgs/tools/graphics/graph-easy/default.nix
index 4ae68207aaec..341d6dea90ac 100644
--- a/pkgs/tools/graphics/graph-easy/default.nix
+++ b/pkgs/tools/graphics/graph-easy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, perlPackages, fetchurl }:
+{ lib, perlPackages, fetchurl }:
 
 perlPackages.buildPerlPackage {
   pname = "Graph-Easy";
diff --git a/pkgs/tools/graphics/ldgallery/compiler/default.nix b/pkgs/tools/graphics/ldgallery/compiler/default.nix
index 000f227075ed..9316e9d38e04 100644
--- a/pkgs/tools/graphics/ldgallery/compiler/default.nix
+++ b/pkgs/tools/graphics/ldgallery/compiler/default.nix
@@ -1,7 +1,7 @@
 # generated with cabal2nix by ./generate.sh
 { mkDerivation, aeson, base, cmdargs, containers, data-ordlist
 , directory, fetchgit, filepath, Glob, hpack, parallel-io, process
-, safe, lib, stdenv, text, time, yaml
+, safe, lib, text, time, yaml
 }:
 mkDerivation {
   pname = "ldgallery-compiler";
diff --git a/pkgs/tools/graphics/pdfredacttools/default.nix b/pkgs/tools/graphics/pdfredacttools/default.nix
index 71d927913c36..0a1cc111b541 100644
--- a/pkgs/tools/graphics/pdfredacttools/default.nix
+++ b/pkgs/tools/graphics/pdfredacttools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python2Packages, imagemagick, exiftool, file, ghostscript }:
+{ lib, fetchFromGitHub, python2Packages, imagemagick, exiftool, file, ghostscript }:
 
 python2Packages.buildPythonApplication rec {
   pname = "pdf-redact-tools";
diff --git a/pkgs/tools/graphics/puppeteer-cli/default.nix b/pkgs/tools/graphics/puppeteer-cli/default.nix
index c01ee232fa7b..20dab27ddf07 100644
--- a/pkgs/tools/graphics/puppeteer-cli/default.nix
+++ b/pkgs/tools/graphics/puppeteer-cli/default.nix
@@ -1,4 +1,4 @@
-{ fetchFromGitHub, makeWrapper, stdenv, chromium, mkYarnPackage
+{ fetchFromGitHub, makeWrapper, chromium, mkYarnPackage
 }:
 
 mkYarnPackage rec {
diff --git a/pkgs/tools/graphics/rocket/default.nix b/pkgs/tools/graphics/rocket/default.nix
index ec32d6c7140f..070e359fe1c5 100644
--- a/pkgs/tools/graphics/rocket/default.nix
+++ b/pkgs/tools/graphics/rocket/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchFromGitHub, qmake, qtbase }:
+{ mkDerivation, lib, fetchFromGitHub, qmake, qtbase }:
 
 mkDerivation {
   pname = "rocket";
diff --git a/pkgs/tools/graphics/shotgun/default.nix b/pkgs/tools/graphics/shotgun/default.nix
index 3c96584029e7..79ddd39ea792 100644
--- a/pkgs/tools/graphics/shotgun/default.nix
+++ b/pkgs/tools/graphics/shotgun/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform, pkg-config, libXrandr, libX11 }:
+{ lib, fetchFromGitHub, rustPlatform, pkg-config, libXrandr, libX11 }:
 
 rustPlatform.buildRustPackage rec {
   pname = "shotgun";
diff --git a/pkgs/tools/graphics/svgcleaner/default.nix b/pkgs/tools/graphics/svgcleaner/default.nix
index 653e585c6ed6..6c5e8569e853 100644
--- a/pkgs/tools/graphics/svgcleaner/default.nix
+++ b/pkgs/tools/graphics/svgcleaner/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage rec {
   pname = "svgcleaner";
diff --git a/pkgs/tools/inputmethods/evdevremapkeys/default.nix b/pkgs/tools/inputmethods/evdevremapkeys/default.nix
index 99f7231c58a4..73344ca26900 100644
--- a/pkgs/tools/inputmethods/evdevremapkeys/default.nix
+++ b/pkgs/tools/inputmethods/evdevremapkeys/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 python3Packages.buildPythonPackage rec {
   pname = "evdevremapkeys";
diff --git a/pkgs/tools/inputmethods/evscript/default.nix b/pkgs/tools/inputmethods/evscript/default.nix
index 01f312fa63d6..66f264bc7a36 100644
--- a/pkgs/tools/inputmethods/evscript/default.nix
+++ b/pkgs/tools/inputmethods/evscript/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, rustPlatform, fetchFromGitHub }:
+{ lib, rustPlatform, fetchFromGitHub }:
 
 rustPlatform.buildRustPackage rec {
   pname = "evscript";
diff --git a/pkgs/tools/inputmethods/fcitx5/fcitx5-chinese-addons.nix b/pkgs/tools/inputmethods/fcitx5/fcitx5-chinese-addons.nix
index 923fd7c7a74e..6d3952c9c225 100644
--- a/pkgs/tools/inputmethods/fcitx5/fcitx5-chinese-addons.nix
+++ b/pkgs/tools/inputmethods/fcitx5/fcitx5-chinese-addons.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , mkDerivation
 , fetchurl
 , fetchFromGitHub
diff --git a/pkgs/tools/inputmethods/fcitx5/fcitx5-configtool.nix b/pkgs/tools/inputmethods/fcitx5/fcitx5-configtool.nix
index ba006873c40a..b133d576c6cc 100644
--- a/pkgs/tools/inputmethods/fcitx5/fcitx5-configtool.nix
+++ b/pkgs/tools/inputmethods/fcitx5/fcitx5-configtool.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , mkDerivation
 , fetchFromGitHub
 , cmake
diff --git a/pkgs/tools/inputmethods/fcitx5/fcitx5-qt.nix b/pkgs/tools/inputmethods/fcitx5/fcitx5-qt.nix
index 155f10fae26e..bfb06a98e8fd 100644
--- a/pkgs/tools/inputmethods/fcitx5/fcitx5-qt.nix
+++ b/pkgs/tools/inputmethods/fcitx5/fcitx5-qt.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , mkDerivation
 , fetchFromGitHub
 , cmake
diff --git a/pkgs/tools/inputmethods/ibus/wrapper.nix b/pkgs/tools/inputmethods/ibus/wrapper.nix
index 74426b2b04ed..93078325a0d2 100644
--- a/pkgs/tools/inputmethods/ibus/wrapper.nix
+++ b/pkgs/tools/inputmethods/ibus/wrapper.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, runCommand, makeWrapper, lndir
+{ lib, runCommand, makeWrapper, lndir
 , dconf, hicolor-icon-theme, ibus, librsvg, plugins ? []
 }:
 
diff --git a/pkgs/tools/misc/3mux/default.nix b/pkgs/tools/misc/3mux/default.nix
index 3f1e981fd0e3..3c51210edc7a 100644
--- a/pkgs/tools/misc/3mux/default.nix
+++ b/pkgs/tools/misc/3mux/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "3mux";
diff --git a/pkgs/tools/misc/adafruit-ampy/default.nix b/pkgs/tools/misc/adafruit-ampy/default.nix
index f51497376393..c9466f54a621 100644
--- a/pkgs/tools/misc/adafruit-ampy/default.nix
+++ b/pkgs/tools/misc/adafruit-ampy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3 }:
+{ lib, python3 }:
 
 with python3.pkgs;
 
diff --git a/pkgs/tools/misc/apt-offline/default.nix b/pkgs/tools/misc/apt-offline/default.nix
index 5c17b7f2d131..9c952cc7c302 100644
--- a/pkgs/tools/misc/apt-offline/default.nix
+++ b/pkgs/tools/misc/apt-offline/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   version = "1.8.1";
diff --git a/pkgs/tools/misc/aptly/default.nix b/pkgs/tools/misc/aptly/default.nix
index 369f7dd219f4..7f82aebabe4a 100644
--- a/pkgs/tools/misc/aptly/default.nix
+++ b/pkgs/tools/misc/aptly/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, installShellFiles, makeWrapper, gnupg, bzip2, xz, graphviz }:
+{ lib, buildGoPackage, fetchFromGitHub, installShellFiles, makeWrapper, gnupg, bzip2, xz, graphviz }:
 
 let
 
diff --git a/pkgs/tools/misc/asciinema-scenario/default.nix b/pkgs/tools/misc/asciinema-scenario/default.nix
index 25bac9768438..f69916621146 100644
--- a/pkgs/tools/misc/asciinema-scenario/default.nix
+++ b/pkgs/tools/misc/asciinema-scenario/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , rustPlatform
 , fetchCrate
 }:
diff --git a/pkgs/tools/misc/azure-vhd-utils/default.nix b/pkgs/tools/misc/azure-vhd-utils/default.nix
index f8a17790ba19..ad48eae7a87f 100644
--- a/pkgs/tools/misc/azure-vhd-utils/default.nix
+++ b/pkgs/tools/misc/azure-vhd-utils/default.nix
@@ -1,5 +1,5 @@
 # This file was generated by go2nix.
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   pname = "azure-vhd-utils";
diff --git a/pkgs/tools/misc/bashplotlib/default.nix b/pkgs/tools/misc/bashplotlib/default.nix
index cc3476f598b7..44d7e93355bb 100644
--- a/pkgs/tools/misc/bashplotlib/default.nix
+++ b/pkgs/tools/misc/bashplotlib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, fetchFromGitHub }:
+{ lib, python3Packages, fetchFromGitHub }:
 
 python3Packages.buildPythonApplication {
   pname = "bashplotlib";
diff --git a/pkgs/tools/misc/bmap-tools/default.nix b/pkgs/tools/misc/bmap-tools/default.nix
index ed42f31f26b3..79094dc9540a 100644
--- a/pkgs/tools/misc/bmap-tools/default.nix
+++ b/pkgs/tools/misc/bmap-tools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python2Packages }:
+{ lib, fetchFromGitHub, python2Packages }:
 
 python2Packages.buildPythonApplication rec {
   pname = "bmap-tools";
diff --git a/pkgs/tools/misc/bonfire/default.nix b/pkgs/tools/misc/bonfire/default.nix
index cda58e80d87c..a3f1608c3ad1 100644
--- a/pkgs/tools/misc/bonfire/default.nix
+++ b/pkgs/tools/misc/bonfire/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, fetchFromGitHub }:
+{ lib, python3Packages, fetchFromGitHub }:
 
 with python3Packages;
 
diff --git a/pkgs/tools/misc/broadlink-cli/default.nix b/pkgs/tools/misc/broadlink-cli/default.nix
index 53925b875916..cb5f582d2dec 100644
--- a/pkgs/tools/misc/broadlink-cli/default.nix
+++ b/pkgs/tools/misc/broadlink-cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, fetchFromGitHub }:
+{ lib, python3Packages, fetchFromGitHub }:
 
 python3Packages.buildPythonApplication {
   pname = "broadlink-cli";
diff --git a/pkgs/tools/misc/chezmoi/default.nix b/pkgs/tools/misc/chezmoi/default.nix
index 15a2a643d32d..48d8b7c89301 100644
--- a/pkgs/tools/misc/chezmoi/default.nix
+++ b/pkgs/tools/misc/chezmoi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, installShellFiles }:
+{ lib, buildGoModule, fetchFromGitHub, installShellFiles }:
 
 buildGoModule rec {
   pname = "chezmoi";
diff --git a/pkgs/tools/misc/ckb-next/default.nix b/pkgs/tools/misc/ckb-next/default.nix
index 6c13c3bbe6ae..9c6909d445d9 100644
--- a/pkgs/tools/misc/ckb-next/default.nix
+++ b/pkgs/tools/misc/ckb-next/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, substituteAll, udev
+{ lib, mkDerivation, fetchFromGitHub, substituteAll, udev
 , pkg-config, qtbase, cmake, zlib, kmod }:
 
 mkDerivation rec {
diff --git a/pkgs/tools/misc/claws/default.nix b/pkgs/tools/misc/claws/default.nix
index 20c8cc7af8f5..c28272e8bfa5 100644
--- a/pkgs/tools/misc/claws/default.nix
+++ b/pkgs/tools/misc/claws/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "claws";
diff --git a/pkgs/tools/misc/cloud-sql-proxy/default.nix b/pkgs/tools/misc/cloud-sql-proxy/default.nix
index 11bfdc508ebc..552ea140d608 100644
--- a/pkgs/tools/misc/cloud-sql-proxy/default.nix
+++ b/pkgs/tools/misc/cloud-sql-proxy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   pname = "cloud-sql-proxy";
diff --git a/pkgs/tools/misc/code-minimap/default.nix b/pkgs/tools/misc/code-minimap/default.nix
index 0ccfe4246458..4808fe3ef564 100644
--- a/pkgs/tools/misc/code-minimap/default.nix
+++ b/pkgs/tools/misc/code-minimap/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , rustPlatform
 , fetchFromGitHub
 }:
diff --git a/pkgs/tools/misc/codebraid/default.nix b/pkgs/tools/misc/codebraid/default.nix
index a855dac5f124..0ecde80c238d 100644
--- a/pkgs/tools/misc/codebraid/default.nix
+++ b/pkgs/tools/misc/codebraid/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, fetchFromGitHub }:
+{ lib, python3Packages, fetchFromGitHub }:
 
 python3Packages.buildPythonApplication rec {
   pname = "codebraid";
diff --git a/pkgs/tools/misc/crudini/default.nix b/pkgs/tools/misc/crudini/default.nix
index a4b499a63235..6527a01e43b7 100644
--- a/pkgs/tools/misc/crudini/default.nix
+++ b/pkgs/tools/misc/crudini/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages, help2man, installShellFiles }:
+{ lib, fetchFromGitHub, python3Packages, help2man, installShellFiles }:
 
 python3Packages.buildPythonApplication rec {
   pname = "crudini";
diff --git a/pkgs/tools/misc/dashing/default.nix b/pkgs/tools/misc/dashing/default.nix
index 546daef5ecbd..496639ec07a5 100644
--- a/pkgs/tools/misc/dashing/default.nix
+++ b/pkgs/tools/misc/dashing/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "dashing";
diff --git a/pkgs/tools/misc/diskonaut/default.nix b/pkgs/tools/misc/diskonaut/default.nix
index 6c295eb00e82..0fb316851702 100644
--- a/pkgs/tools/misc/diskonaut/default.nix
+++ b/pkgs/tools/misc/diskonaut/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, rustPlatform, fetchFromGitHub }:
+{ lib, rustPlatform, fetchFromGitHub }:
 
 rustPlatform.buildRustPackage rec {
   pname = "diskonaut";
diff --git a/pkgs/tools/misc/docker-ls/default.nix b/pkgs/tools/misc/docker-ls/default.nix
index df9755f863da..b84830681174 100644
--- a/pkgs/tools/misc/docker-ls/default.nix
+++ b/pkgs/tools/misc/docker-ls/default.nix
@@ -1,4 +1,4 @@
-{ buildGoModule, fetchFromGitHub, lib, stdenv, docker }:
+{ buildGoModule, fetchFromGitHub, lib, docker }:
 
 buildGoModule rec {
   pname = "docker-ls";
diff --git a/pkgs/tools/misc/docui/default.nix b/pkgs/tools/misc/docui/default.nix
index e4934853e825..a1b2ad662bc6 100644
--- a/pkgs/tools/misc/docui/default.nix
+++ b/pkgs/tools/misc/docui/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "docui";
diff --git a/pkgs/tools/misc/doitlive/default.nix b/pkgs/tools/misc/doitlive/default.nix
index 313dc9935faf..9edc078d9f9c 100644
--- a/pkgs/tools/misc/doitlive/default.nix
+++ b/pkgs/tools/misc/doitlive/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages }:
+{ lib, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   pname = "doitlive";
diff --git a/pkgs/tools/misc/dust/default.nix b/pkgs/tools/misc/dust/default.nix
index c40753dcf99a..7997f2119a28 100644
--- a/pkgs/tools/misc/dust/default.nix
+++ b/pkgs/tools/misc/dust/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage rec {
   pname = "du-dust";
diff --git a/pkgs/tools/misc/envdir-go/default.nix b/pkgs/tools/misc/envdir-go/default.nix
index 7ec763f16c6e..eafc71030ac8 100644
--- a/pkgs/tools/misc/envdir-go/default.nix
+++ b/pkgs/tools/misc/envdir-go/default.nix
@@ -1,5 +1,5 @@
 # This file was generated by https://github.com/kamilchm/go2nix v1.2.1
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   version = "1.0.0";
diff --git a/pkgs/tools/misc/esptool/default.nix b/pkgs/tools/misc/esptool/default.nix
index 89be1da8cc98..7c7f91621b82 100644
--- a/pkgs/tools/misc/esptool/default.nix
+++ b/pkgs/tools/misc/esptool/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3, openssl }:
+{ lib, fetchFromGitHub, python3, openssl }:
 
 python3.pkgs.buildPythonApplication rec {
   pname = "esptool";
diff --git a/pkgs/tools/misc/eva/default.nix b/pkgs/tools/misc/eva/default.nix
index 65da084f8419..253e815008a7 100644
--- a/pkgs/tools/misc/eva/default.nix
+++ b/pkgs/tools/misc/eva/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform, fetchpatch }:
+{ lib, fetchFromGitHub, rustPlatform, fetchpatch }:
 
 rustPlatform.buildRustPackage rec {
   pname = "eva";
diff --git a/pkgs/tools/misc/fselect/default.nix b/pkgs/tools/misc/fselect/default.nix
index 1076c44a1bb3..7416961e84e8 100644
--- a/pkgs/tools/misc/fselect/default.nix
+++ b/pkgs/tools/misc/fselect/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform, installShellFiles }:
+{ lib, fetchFromGitHub, rustPlatform, installShellFiles }:
 
 rustPlatform.buildRustPackage rec {
   pname = "fselect";
diff --git a/pkgs/tools/misc/fsql/default.nix b/pkgs/tools/misc/fsql/default.nix
index 8e113ee871a1..100e70232321 100644
--- a/pkgs/tools/misc/fsql/default.nix
+++ b/pkgs/tools/misc/fsql/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "fsql";
diff --git a/pkgs/tools/misc/g933-utils/default.nix b/pkgs/tools/misc/g933-utils/default.nix
index 9cb056097726..7fbfadfac76d 100644
--- a/pkgs/tools/misc/g933-utils/default.nix
+++ b/pkgs/tools/misc/g933-utils/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform, udev, pkg-config }:
+{ lib, fetchFromGitHub, rustPlatform, udev, pkg-config }:
 
 rustPlatform.buildRustPackage rec {
   pname = "g933-utils";
diff --git a/pkgs/tools/misc/gawp/default.nix b/pkgs/tools/misc/gawp/default.nix
index d518ba88fb6c..5c7953a766ee 100644
--- a/pkgs/tools/misc/gawp/default.nix
+++ b/pkgs/tools/misc/gawp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 with builtins;
 
diff --git a/pkgs/tools/misc/gh-ost/default.nix b/pkgs/tools/misc/gh-ost/default.nix
index 6096dac96221..dd28ddfaff55 100644
--- a/pkgs/tools/misc/gh-ost/default.nix
+++ b/pkgs/tools/misc/gh-ost/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "gh-ost";
diff --git a/pkgs/tools/misc/gif-for-cli/default.nix b/pkgs/tools/misc/gif-for-cli/default.nix
index e82cafdd64cd..bbb1b8b96402 100644
--- a/pkgs/tools/misc/gif-for-cli/default.nix
+++ b/pkgs/tools/misc/gif-for-cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages, ffmpeg, zlib, libjpeg }:
+{ lib, fetchFromGitHub, python3Packages, ffmpeg, zlib, libjpeg }:
 
 python3Packages.buildPythonApplication {
   pname = "gif-for-cli";
diff --git a/pkgs/tools/misc/git-town/default.nix b/pkgs/tools/misc/git-town/default.nix
index cf3a6aba19f0..56f9452db7b7 100644
--- a/pkgs/tools/misc/git-town/default.nix
+++ b/pkgs/tools/misc/git-town/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "git-town";
diff --git a/pkgs/tools/misc/go.rice/default.nix b/pkgs/tools/misc/go.rice/default.nix
index 26b082e43b39..295bf0102796 100644
--- a/pkgs/tools/misc/go.rice/default.nix
+++ b/pkgs/tools/misc/go.rice/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "go.rice";
diff --git a/pkgs/tools/misc/gosu/default.nix b/pkgs/tools/misc/gosu/default.nix
index 7bc7eab34562..033883ab1c8c 100644
--- a/pkgs/tools/misc/gosu/default.nix
+++ b/pkgs/tools/misc/gosu/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   pname = "gosu";
diff --git a/pkgs/tools/misc/grc/default.nix b/pkgs/tools/misc/grc/default.nix
index 3188dcdafbf3..8fe35012090d 100644
--- a/pkgs/tools/misc/grc/default.nix
+++ b/pkgs/tools/misc/grc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   pname = "grc";
diff --git a/pkgs/tools/misc/hacksaw/default.nix b/pkgs/tools/misc/hacksaw/default.nix
index a0e884e82d90..419cff20087f 100644
--- a/pkgs/tools/misc/hacksaw/default.nix
+++ b/pkgs/tools/misc/hacksaw/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchCrate, rustPlatform, pkg-config, libXrandr, libX11, python3 }:
+{ lib, fetchCrate, rustPlatform, pkg-config, libXrandr, libX11, python3 }:
 
 rustPlatform.buildRustPackage rec {
   pname = "hacksaw";
diff --git a/pkgs/tools/misc/heatseeker/default.nix b/pkgs/tools/misc/heatseeker/default.nix
index 13933c6c28a6..9d50530df471 100644
--- a/pkgs/tools/misc/heatseeker/default.nix
+++ b/pkgs/tools/misc/heatseeker/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform, coreutils }:
+{ lib, fetchFromGitHub, rustPlatform, coreutils }:
 
 rustPlatform.buildRustPackage rec {
   pname = "heatseeker";
diff --git a/pkgs/tools/misc/hexyl/default.nix b/pkgs/tools/misc/hexyl/default.nix
index e75d01057314..d825368cb970 100644
--- a/pkgs/tools/misc/hexyl/default.nix
+++ b/pkgs/tools/misc/hexyl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage rec {
   pname   = "hexyl";
diff --git a/pkgs/tools/misc/hyperledger-fabric/default.nix b/pkgs/tools/misc/hyperledger-fabric/default.nix
index 13a88dcba303..9f7fa31d3f2c 100644
--- a/pkgs/tools/misc/hyperledger-fabric/default.nix
+++ b/pkgs/tools/misc/hyperledger-fabric/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "hyperledger-fabric";
diff --git a/pkgs/tools/misc/i3cat/default.nix b/pkgs/tools/misc/i3cat/default.nix
index d75b878ae6d4..e91b17856ed7 100644
--- a/pkgs/tools/misc/i3cat/default.nix
+++ b/pkgs/tools/misc/i3cat/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   pname = "i3cat";
diff --git a/pkgs/tools/misc/i3minator/default.nix b/pkgs/tools/misc/i3minator/default.nix
index d58efd7a0d42..6e207ce69166 100644
--- a/pkgs/tools/misc/i3minator/default.nix
+++ b/pkgs/tools/misc/i3minator/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, pythonPackages, glibcLocales }:
+{ lib, fetchFromGitHub, pythonPackages, glibcLocales }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "i3minator";
diff --git a/pkgs/tools/misc/ical2org/default.nix b/pkgs/tools/misc/ical2org/default.nix
index 58afffcd7061..78f40974ace4 100644
--- a/pkgs/tools/misc/ical2org/default.nix
+++ b/pkgs/tools/misc/ical2org/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoPackage}:
+{ lib, fetchFromGitHub, buildGoPackage}:
 
 buildGoPackage rec {
   pname = "ical2org";
diff --git a/pkgs/tools/misc/kargo/default.nix b/pkgs/tools/misc/kargo/default.nix
index 00bf94034273..8c24848f4b59 100644
--- a/pkgs/tools/misc/kargo/default.nix
+++ b/pkgs/tools/misc/kargo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, python3Packages }:
+{ lib, fetchurl, python3Packages }:
 
 with python3Packages;
 
diff --git a/pkgs/tools/misc/kt/default.nix b/pkgs/tools/misc/kt/default.nix
index 8d70b35584e7..e4713890ac40 100644
--- a/pkgs/tools/misc/kt/default.nix
+++ b/pkgs/tools/misc/kt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoPackage }:
+{ lib, fetchFromGitHub, buildGoPackage }:
 
 buildGoPackage rec {
   pname = "kt";
diff --git a/pkgs/tools/misc/lazydocker/default.nix b/pkgs/tools/misc/lazydocker/default.nix
index ea66a04a40df..ed186772ab78 100644
--- a/pkgs/tools/misc/lazydocker/default.nix
+++ b/pkgs/tools/misc/lazydocker/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "lazydocker";
diff --git a/pkgs/tools/misc/lice/default.nix b/pkgs/tools/misc/lice/default.nix
index f7a8c68ed062..3322196d6ed5 100644
--- a/pkgs/tools/misc/lice/default.nix
+++ b/pkgs/tools/misc/lice/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 python3Packages.buildPythonPackage rec {
 
diff --git a/pkgs/tools/misc/lnch/default.nix b/pkgs/tools/misc/lnch/default.nix
index 377ba05eba69..8f41499ca06b 100644
--- a/pkgs/tools/misc/lnch/default.nix
+++ b/pkgs/tools/misc/lnch/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoPackage }:
+{ lib, fetchFromGitHub, buildGoPackage }:
 
 buildGoPackage rec {
   pname = "lnch";
diff --git a/pkgs/tools/misc/lokalise2-cli/default.nix b/pkgs/tools/misc/lokalise2-cli/default.nix
index 1b2fa9bda86b..0cbf43a8790e 100644
--- a/pkgs/tools/misc/lokalise2-cli/default.nix
+++ b/pkgs/tools/misc/lokalise2-cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "lokalise2-cli";
diff --git a/pkgs/tools/misc/loop/default.nix b/pkgs/tools/misc/loop/default.nix
index b7bd7678535c..0c3e206a9f28 100644
--- a/pkgs/tools/misc/loop/default.nix
+++ b/pkgs/tools/misc/loop/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage {
   pname = "loop";
diff --git a/pkgs/tools/misc/lsd/default.nix b/pkgs/tools/misc/lsd/default.nix
index 239c9651b86d..c3c9fab8c1ed 100644
--- a/pkgs/tools/misc/lsd/default.nix
+++ b/pkgs/tools/misc/lsd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , nixosTests
 , fetchFromGitHub
 , rustPlatform
diff --git a/pkgs/tools/misc/me_cleaner/default.nix b/pkgs/tools/misc/me_cleaner/default.nix
index 19f43f2c8c5f..5335624467db 100644
--- a/pkgs/tools/misc/me_cleaner/default.nix
+++ b/pkgs/tools/misc/me_cleaner/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub }:
+{ lib, buildPythonPackage, fetchFromGitHub }:
 
 buildPythonPackage rec {
   pname = "me_cleaner";
diff --git a/pkgs/tools/misc/microplane/default.nix b/pkgs/tools/misc/microplane/default.nix
index a0ac411f98e1..131367cf9f2a 100644
--- a/pkgs/tools/misc/microplane/default.nix
+++ b/pkgs/tools/misc/microplane/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "microplane";
diff --git a/pkgs/tools/misc/mimeo/default.nix b/pkgs/tools/misc/mimeo/default.nix
index 6c332198fa75..f2ef73cfd99b 100644
--- a/pkgs/tools/misc/mimeo/default.nix
+++ b/pkgs/tools/misc/mimeo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, desktop-file-utils, file, python3Packages }:
+{ lib, fetchurl, desktop-file-utils, file, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   pname = "mimeo";
diff --git a/pkgs/tools/misc/mmake/default.nix b/pkgs/tools/misc/mmake/default.nix
index 5dcbcb065ecc..564e1989aee8 100644
--- a/pkgs/tools/misc/mmake/default.nix
+++ b/pkgs/tools/misc/mmake/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "mmake";
diff --git a/pkgs/tools/misc/mongodb-tools/default.nix b/pkgs/tools/misc/mongodb-tools/default.nix
index 0415955e0927..7949a82edc48 100644
--- a/pkgs/tools/misc/mongodb-tools/default.nix
+++ b/pkgs/tools/misc/mongodb-tools/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , buildGoPackage
 , fetchFromGitHub
 , openssl
diff --git a/pkgs/tools/misc/nagstamon/default.nix b/pkgs/tools/misc/nagstamon/default.nix
index 3bd297628b2d..e9f76dbf22d9 100644
--- a/pkgs/tools/misc/nagstamon/default.nix
+++ b/pkgs/tools/misc/nagstamon/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, pythonPackages }:
+{ lib, fetchurl, pythonPackages }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "nagstamon";
diff --git a/pkgs/tools/misc/noteshrink/default.nix b/pkgs/tools/misc/noteshrink/default.nix
index 2d6f23de4687..67c49c3ad0d5 100644
--- a/pkgs/tools/misc/noteshrink/default.nix
+++ b/pkgs/tools/misc/noteshrink/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3, imagemagick }:
+{ lib, fetchFromGitHub, python3, imagemagick }:
 
 with python3.pkgs;
 
diff --git a/pkgs/tools/misc/ntfy/default.nix b/pkgs/tools/misc/ntfy/default.nix
index 9f28d99ba0f3..23d4fd57f620 100644
--- a/pkgs/tools/misc/ntfy/default.nix
+++ b/pkgs/tools/misc/ntfy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, fetchFromGitHub }:
+{ lib, python3Packages, fetchFromGitHub }:
 
 python3Packages.buildPythonApplication rec {
   pname = "ntfy";
diff --git a/pkgs/tools/misc/pdd/default.nix b/pkgs/tools/misc/pdd/default.nix
index b339f94deb18..916f15c94c6e 100644
--- a/pkgs/tools/misc/pdd/default.nix
+++ b/pkgs/tools/misc/pdd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonApplication, dateutil }:
+{ lib, fetchFromGitHub, buildPythonApplication, dateutil }:
 
 buildPythonApplication rec {
   pname = "pdd";
diff --git a/pkgs/tools/misc/pdf-parser/default.nix b/pkgs/tools/misc/pdf-parser/default.nix
index ceb8b4d68d99..f4572d0e5bcc 100644
--- a/pkgs/tools/misc/pdf-parser/default.nix
+++ b/pkgs/tools/misc/pdf-parser/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, fetchzip }:
+{ lib, python3Packages, fetchzip }:
 
 python3Packages.buildPythonApplication {
   pname = "pdf-parser";
diff --git a/pkgs/tools/misc/pgcenter/default.nix b/pkgs/tools/misc/pgcenter/default.nix
index 5a59e3030e64..8afaa61e35b5 100644
--- a/pkgs/tools/misc/pgcenter/default.nix
+++ b/pkgs/tools/misc/pgcenter/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "pgcenter";
diff --git a/pkgs/tools/misc/pgmetrics/default.nix b/pkgs/tools/misc/pgmetrics/default.nix
index 70429ef811a6..54e7093747bf 100644
--- a/pkgs/tools/misc/pgmetrics/default.nix
+++ b/pkgs/tools/misc/pgmetrics/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "pgmetrics";
diff --git a/pkgs/tools/misc/phraseapp-client/default.nix b/pkgs/tools/misc/phraseapp-client/default.nix
index 27c486f4bea3..12b11cf20d01 100644
--- a/pkgs/tools/misc/phraseapp-client/default.nix
+++ b/pkgs/tools/misc/phraseapp-client/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "phraseapp-client";
diff --git a/pkgs/tools/misc/pistol/default.nix b/pkgs/tools/misc/pistol/default.nix
index 874bbdbaf701..6eec45db0119 100644
--- a/pkgs/tools/misc/pistol/default.nix
+++ b/pkgs/tools/misc/pistol/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildGoModule
 , fetchFromGitHub
 , file
diff --git a/pkgs/tools/misc/powerline-go/default.nix b/pkgs/tools/misc/powerline-go/default.nix
index 2b46e25c67e8..f69a5c7d380f 100644
--- a/pkgs/tools/misc/powerline-go/default.nix
+++ b/pkgs/tools/misc/powerline-go/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "powerline-go";
diff --git a/pkgs/tools/misc/pubs/default.nix b/pkgs/tools/misc/pubs/default.nix
index 82e7659d1524..be5fd6d499c3 100644
--- a/pkgs/tools/misc/pubs/default.nix
+++ b/pkgs/tools/misc/pubs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, fetchpatch, python3Packages }:
+{ lib, fetchFromGitHub, fetchpatch, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   pname = "pubs";
diff --git a/pkgs/tools/misc/rargs/default.nix b/pkgs/tools/misc/rargs/default.nix
index 834a62803f67..dc07e3dd4f40 100644
--- a/pkgs/tools/misc/rargs/default.nix
+++ b/pkgs/tools/misc/rargs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, rustPlatform, fetchFromGitHub }:
+{ lib, rustPlatform, fetchFromGitHub }:
 
 rustPlatform.buildRustPackage rec {
   pname   = "rargs";
diff --git a/pkgs/tools/misc/rename/default.nix b/pkgs/tools/misc/rename/default.nix
index 63ceca8d9349..a9f42d1139e5 100644
--- a/pkgs/tools/misc/rename/default.nix
+++ b/pkgs/tools/misc/rename/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, perlPackages }:
+{ lib, fetchFromGitHub, perlPackages }:
 
 perlPackages.buildPerlPackage {
   pname = "rename";
diff --git a/pkgs/tools/misc/shelldap/default.nix b/pkgs/tools/misc/shelldap/default.nix
index 41e4207d6c98..18c5aea3dfd8 100644
--- a/pkgs/tools/misc/shelldap/default.nix
+++ b/pkgs/tools/misc/shelldap/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, perlPackages }:
+{ lib, fetchurl, perlPackages }:
 perlPackages.buildPerlPackage rec {
   pname = "shelldap";
   version = "1.4.0";
diff --git a/pkgs/tools/misc/swaglyrics/default.nix b/pkgs/tools/misc/swaglyrics/default.nix
index c24b12f95392..4bc5c28b5599 100644
--- a/pkgs/tools/misc/swaglyrics/default.nix
+++ b/pkgs/tools/misc/swaglyrics/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, python3, fetchFromGitHub, ncurses }:
+{ lib, python3, fetchFromGitHub, ncurses }:
 
 python3.pkgs.buildPythonApplication rec {
   pname = "swaglyrics";
diff --git a/pkgs/tools/misc/systrayhelper/default.nix b/pkgs/tools/misc/systrayhelper/default.nix
index e898ded81546..03d8e58f8b02 100644
--- a/pkgs/tools/misc/systrayhelper/default.nix
+++ b/pkgs/tools/misc/systrayhelper/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, pkg-config, libappindicator-gtk3, buildGoPackage, fetchFromGitHub }:
+{ lib, pkg-config, libappindicator-gtk3, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "systrayhelper";
diff --git a/pkgs/tools/misc/tagref/default.nix b/pkgs/tools/misc/tagref/default.nix
index 43a91eaca529..ba63ec290d4c 100644
--- a/pkgs/tools/misc/tagref/default.nix
+++ b/pkgs/tools/misc/tagref/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 rustPlatform.buildRustPackage rec {
   pname = "tagref";
   version = "1.4.1";
diff --git a/pkgs/tools/misc/tensorman/default.nix b/pkgs/tools/misc/tensorman/default.nix
index 84bfdc55d7fb..0e724059e99d 100644
--- a/pkgs/tools/misc/tensorman/default.nix
+++ b/pkgs/tools/misc/tensorman/default.nix
@@ -1,4 +1,4 @@
-{ pkg-config, lib, stdenv, rustPlatform, rustc, cargo, docker, openssl, fetchFromGitHub }:
+{ pkg-config, lib, rustPlatform, rustc, cargo, docker, openssl, fetchFromGitHub }:
 
 rustPlatform.buildRustPackage rec {
   pname = "tensorman";
diff --git a/pkgs/tools/misc/tewisay/default.nix b/pkgs/tools/misc/tewisay/default.nix
index 0e07f3e53f32..3434ac110b35 100644
--- a/pkgs/tools/misc/tewisay/default.nix
+++ b/pkgs/tools/misc/tewisay/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, makeWrapper }:
+{ lib, buildGoPackage, fetchFromGitHub, makeWrapper }:
 
 buildGoPackage rec {
   pname = "tewisay-unstable";
diff --git a/pkgs/tools/misc/thefuck/default.nix b/pkgs/tools/misc/thefuck/default.nix
index bf87505ab135..d26c750a0c76 100644
--- a/pkgs/tools/misc/thefuck/default.nix
+++ b/pkgs/tools/misc/thefuck/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonApplication
+{ lib, fetchFromGitHub, buildPythonApplication
 , colorama, decorator, psutil, pyte, six
 , pytest, pytest-mock
 }:
diff --git a/pkgs/tools/misc/tmuxp/default.nix b/pkgs/tools/misc/tmuxp/default.nix
index 940ae130c846..57d320fd7906 100644
--- a/pkgs/tools/misc/tmuxp/default.nix
+++ b/pkgs/tools/misc/tmuxp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python }:
+{ lib, python }:
 
 with python.pkgs;
 
diff --git a/pkgs/tools/misc/togglesg-download/default.nix b/pkgs/tools/misc/togglesg-download/default.nix
index c4d8b20ffdd6..812ad7900d01 100644
--- a/pkgs/tools/misc/togglesg-download/default.nix
+++ b/pkgs/tools/misc/togglesg-download/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, pythonPackages, makeWrapper, ffmpeg_3 }:
+{ lib, fetchFromGitHub, pythonPackages, makeWrapper, ffmpeg_3 }:
 
 pythonPackages.buildPythonApplication {
 
diff --git a/pkgs/tools/misc/trash-cli/default.nix b/pkgs/tools/misc/trash-cli/default.nix
index 1da49a153b82..d199fd7fda3d 100644
--- a/pkgs/tools/misc/trash-cli/default.nix
+++ b/pkgs/tools/misc/trash-cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   pname = "trash-cli";
diff --git a/pkgs/tools/misc/trillian/default.nix b/pkgs/tools/misc/trillian/default.nix
index 07b4d8349787..8a96248e718a 100644
--- a/pkgs/tools/misc/trillian/default.nix
+++ b/pkgs/tools/misc/trillian/default.nix
@@ -1,15 +1,11 @@
-{ stdenv
-, lib
+{ lib
 , buildGoModule
 , fetchFromGitHub
 }:
-let
+
+buildGoModule rec {
   pname = "trillian";
   version = "1.3.11";
-
-in
-buildGoModule {
-  inherit pname version;
   vendorSha256 = "0zxp1gjzcc3z6vkpc2bchbs1shwm1b28ks0jh4gf6zxpp4361j4l";
 
   src = fetchFromGitHub {
@@ -34,10 +30,10 @@ buildGoModule {
     "cmd/updatetree"
   ];
 
-  meta = {
+  meta = with lib; {
     homepage = "https://github.com/google/trillian";
     description = "A transparent, highly scalable and cryptographically verifiable data store.";
-    license = [ lib.licenses.asl20 ];
-    maintainers = [ lib.maintainers.adisbladis ];
+    license = [ licenses.asl20 ];
+    maintainers = [ maintainers.adisbladis ];
   };
 }
diff --git a/pkgs/tools/misc/tydra/default.nix b/pkgs/tools/misc/tydra/default.nix
index 6714ee489f5c..00c8aa2a2c3b 100644
--- a/pkgs/tools/misc/tydra/default.nix
+++ b/pkgs/tools/misc/tydra/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, rustPlatform, fetchFromGitHub, installShellFiles }:
+{ lib, rustPlatform, fetchFromGitHub, installShellFiles }:
 
 rustPlatform.buildRustPackage rec {
   pname = "tydra";
diff --git a/pkgs/tools/misc/unicode/default.nix b/pkgs/tools/misc/unicode/default.nix
index c8e1a0f7ca4b..a2bc615ed86f 100644
--- a/pkgs/tools/misc/unicode/default.nix
+++ b/pkgs/tools/misc/unicode/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, fetchurl, python3Packages, installShellFiles }:
+{ lib, fetchFromGitHub, fetchurl, python3Packages, installShellFiles }:
 
 python3Packages.buildPythonApplication rec {
   pname = "unicode";
diff --git a/pkgs/tools/misc/upower-notify/default.nix b/pkgs/tools/misc/upower-notify/default.nix
index ddc0fa42c691..79460f3a5b79 100644
--- a/pkgs/tools/misc/upower-notify/default.nix
+++ b/pkgs/tools/misc/upower-notify/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 # To use upower-notify, the maintainer suggests adding something like this to your configuration.nix:
 #
diff --git a/pkgs/tools/misc/vimwiki-markdown/default.nix b/pkgs/tools/misc/vimwiki-markdown/default.nix
index c1b1fce7abdd..18adf99b9c99 100644
--- a/pkgs/tools/misc/vimwiki-markdown/default.nix
+++ b/pkgs/tools/misc/vimwiki-markdown/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonApplication
 , fetchPypi
 , markdown
diff --git a/pkgs/tools/misc/vivid/default.nix b/pkgs/tools/misc/vivid/default.nix
index dad352cc6577..e131d8bd4e73 100644
--- a/pkgs/tools/misc/vivid/default.nix
+++ b/pkgs/tools/misc/vivid/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage rec {
   pname = "vivid";
diff --git a/pkgs/tools/misc/void/default.nix b/pkgs/tools/misc/void/default.nix
index e6d36155732e..18699e5911dc 100644
--- a/pkgs/tools/misc/void/default.nix
+++ b/pkgs/tools/misc/void/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage rec {
   pname = "void";
diff --git a/pkgs/tools/misc/wakatime/default.nix b/pkgs/tools/misc/wakatime/default.nix
index 75f461062093..e8bd12d567b6 100644
--- a/pkgs/tools/misc/wakatime/default.nix
+++ b/pkgs/tools/misc/wakatime/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, fetchFromGitHub, glibcLocales }:
+{ lib, python3Packages, fetchFromGitHub, glibcLocales }:
 
 with python3Packages;
 buildPythonApplication rec {
diff --git a/pkgs/tools/misc/xdxf2slob/default.nix b/pkgs/tools/misc/xdxf2slob/default.nix
index 8d4998a9ff99..b898aa2fc242 100644
--- a/pkgs/tools/misc/xdxf2slob/default.nix
+++ b/pkgs/tools/misc/xdxf2slob/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 python3Packages.buildPythonApplication {
   name = "xdxf2slob-unstable-2015-06-30";
diff --git a/pkgs/tools/misc/xflux/gui.nix b/pkgs/tools/misc/xflux/gui.nix
index 378337f6232b..16379820653b 100644
--- a/pkgs/tools/misc/xflux/gui.nix
+++ b/pkgs/tools/misc/xflux/gui.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonApplication, python3Packages, wrapGAppsHook
+{ lib, fetchFromGitHub, buildPythonApplication, python3Packages, wrapGAppsHook
 , xflux, librsvg, gtk3, gobject-introspection, pango, gdk-pixbuf, atk
 , pexpect, pyGtkGlade, pygobject3, pyxdg, libappindicator-gtk3
 }:
diff --git a/pkgs/tools/misc/xmonad-log/default.nix b/pkgs/tools/misc/xmonad-log/default.nix
index b8dd369cd6a8..acd4a9e1d46d 100644
--- a/pkgs/tools/misc/xmonad-log/default.nix
+++ b/pkgs/tools/misc/xmonad-log/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "xmonad-log";
diff --git a/pkgs/tools/misc/yle-dl/default.nix b/pkgs/tools/misc/yle-dl/default.nix
index 64568ca46b06..9ee81cd1b158 100644
--- a/pkgs/tools/misc/yle-dl/default.nix
+++ b/pkgs/tools/misc/yle-dl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rtmpdump, php, wget, python3Packages, ffmpeg_3 }:
+{ lib, fetchFromGitHub, rtmpdump, php, wget, python3Packages, ffmpeg_3 }:
 
 python3Packages.buildPythonApplication rec {
   pname = "yle-dl";
diff --git a/pkgs/tools/misc/you-get/default.nix b/pkgs/tools/misc/you-get/default.nix
index 544430839965..f58fb349c959 100644
--- a/pkgs/tools/misc/you-get/default.nix
+++ b/pkgs/tools/misc/you-get/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonApplication, fetchPypi }:
+{ lib, buildPythonApplication, fetchPypi }:
 
 buildPythonApplication rec {
   pname = "you-get";
diff --git a/pkgs/tools/misc/yubikey-neo-manager/default.nix b/pkgs/tools/misc/yubikey-neo-manager/default.nix
index eeb4f5c1bd59..3991b99fcdcf 100644
--- a/pkgs/tools/misc/yubikey-neo-manager/default.nix
+++ b/pkgs/tools/misc/yubikey-neo-manager/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, python27Packages
+{ lib, fetchurl, python27Packages
 , libykneomgr, yubikey-personalization, libu2f-host }:
 
 python27Packages.buildPythonPackage rec {
diff --git a/pkgs/tools/misc/yubikey-personalization-gui/default.nix b/pkgs/tools/misc/yubikey-personalization-gui/default.nix
index 6934791da8ea..af6843e38202 100644
--- a/pkgs/tools/misc/yubikey-personalization-gui/default.nix
+++ b/pkgs/tools/misc/yubikey-personalization-gui/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, mkDerivation, pkg-config, qtbase, qmake, imagemagick
+{ lib, fetchurl, mkDerivation, pkg-config, qtbase, qmake, imagemagick
 , libyubikey, yubikey-personalization }:
 
 mkDerivation rec {
diff --git a/pkgs/tools/misc/zabbixctl/default.nix b/pkgs/tools/misc/zabbixctl/default.nix
index 15add8ed1919..81d81b6794eb 100644
--- a/pkgs/tools/misc/zabbixctl/default.nix
+++ b/pkgs/tools/misc/zabbixctl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "zabbixctl";
diff --git a/pkgs/tools/networking/assh/default.nix b/pkgs/tools/networking/assh/default.nix
index 13018d183ca4..3995fc295d10 100644
--- a/pkgs/tools/networking/assh/default.nix
+++ b/pkgs/tools/networking/assh/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, openssh, makeWrapper }:
+{ lib, buildGoModule, fetchFromGitHub, openssh, makeWrapper }:
 
 buildGoModule rec {
   pname = "assh";
diff --git a/pkgs/tools/networking/brook/default.nix b/pkgs/tools/networking/brook/default.nix
index f84176495aa4..b6f7cb1869ad 100644
--- a/pkgs/tools/networking/brook/default.nix
+++ b/pkgs/tools/networking/brook/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "brook";
diff --git a/pkgs/tools/networking/bukubrow/default.nix b/pkgs/tools/networking/bukubrow/default.nix
index 5188954b7634..157720651f43 100644
--- a/pkgs/tools/networking/bukubrow/default.nix
+++ b/pkgs/tools/networking/bukubrow/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, rustPlatform, fetchFromGitHub, sqlite }: let
+{ lib, rustPlatform, fetchFromGitHub, sqlite }: let
 
 manifest = {
   description = "Bukubrow extension host application";
diff --git a/pkgs/tools/networking/circus/default.nix b/pkgs/tools/networking/circus/default.nix
index 891eb19c8352..f24c0e629cb0 100644
--- a/pkgs/tools/networking/circus/default.nix
+++ b/pkgs/tools/networking/circus/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3 }:
+{ lib, python3 }:
 
 let
   python = python3.override {
diff --git a/pkgs/tools/networking/clash/default.nix b/pkgs/tools/networking/clash/default.nix
index 590fcf1dbafe..543c86db307f 100644
--- a/pkgs/tools/networking/clash/default.nix
+++ b/pkgs/tools/networking/clash/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoModule }:
+{ lib, fetchFromGitHub, buildGoModule }:
 
 buildGoModule rec {
   pname = "clash";
diff --git a/pkgs/tools/networking/connman/connman-notify/default.nix b/pkgs/tools/networking/connman/connman-notify/default.nix
index 9f0c9873e2a7..cbf500913038 100644
--- a/pkgs/tools/networking/connman/connman-notify/default.nix
+++ b/pkgs/tools/networking/connman/connman-notify/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitLab, python3Packages, glib, gobject-introspection, wrapGAppsHook }:
+{ lib, fetchFromGitLab, python3Packages, glib, gobject-introspection, wrapGAppsHook }:
 
 python3Packages.buildPythonApplication {
   pname = "connman-notify";
diff --git a/pkgs/tools/networking/corerad/default.nix b/pkgs/tools/networking/corerad/default.nix
index 64e8e09467d9..a7e5026d83af 100644
--- a/pkgs/tools/networking/corerad/default.nix
+++ b/pkgs/tools/networking/corerad/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, nixosTests }:
+{ lib, buildGoModule, fetchFromGitHub, nixosTests }:
 
 buildGoModule rec {
   pname = "corerad";
diff --git a/pkgs/tools/networking/croc/default.nix b/pkgs/tools/networking/croc/default.nix
index 92493ab109f4..4a4578a73562 100644
--- a/pkgs/tools/networking/croc/default.nix
+++ b/pkgs/tools/networking/croc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, callPackage}:
+{ lib, buildGoModule, fetchFromGitHub, callPackage}:
 
 buildGoModule rec {
   pname = "croc";
diff --git a/pkgs/tools/networking/curl-unix-socket/default.nix b/pkgs/tools/networking/curl-unix-socket/default.nix
index 84b5c1861cd3..ab4c3292ea51 100644
--- a/pkgs/tools/networking/curl-unix-socket/default.nix
+++ b/pkgs/tools/networking/curl-unix-socket/default.nix
@@ -1,4 +1,4 @@
-{ buildGoPackage, lib, stdenv, fetchFromGitHub }:
+{ buildGoPackage, lib, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "curl-unix-socket-2015-04-10";
diff --git a/pkgs/tools/networking/dd-agent/datadog-agent.nix b/pkgs/tools/networking/dd-agent/datadog-agent.nix
index d980d5702261..ad37245d57ca 100644
--- a/pkgs/tools/networking/dd-agent/datadog-agent.nix
+++ b/pkgs/tools/networking/dd-agent/datadog-agent.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoPackage, makeWrapper, pythonPackages, pkg-config, systemd, hostname, extraTags ? [] }:
+{ lib, fetchFromGitHub, buildGoPackage, makeWrapper, pythonPackages, pkg-config, systemd, hostname, extraTags ? [] }:
 
 let
   # keep this in sync with github.com/DataDog/agent-payload dependency
diff --git a/pkgs/tools/networking/dd-agent/datadog-process-agent.nix b/pkgs/tools/networking/dd-agent/datadog-process-agent.nix
index a77030bba930..e2c497dad405 100644
--- a/pkgs/tools/networking/dd-agent/datadog-process-agent.nix
+++ b/pkgs/tools/networking/dd-agent/datadog-process-agent.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoPackage  }:
+{ lib, fetchFromGitHub, buildGoPackage  }:
 
 buildGoPackage rec {
   pname = "datadog-process-agent";
diff --git a/pkgs/tools/networking/ddclient/default.nix b/pkgs/tools/networking/ddclient/default.nix
index 3b52c2be2527..51454ac1197c 100644
--- a/pkgs/tools/networking/ddclient/default.nix
+++ b/pkgs/tools/networking/ddclient/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, perlPackages, iproute, perl }:
+{ lib, fetchurl, perlPackages, iproute, perl }:
 
 perlPackages.buildPerlPackage rec {
   pname = "ddclient";
diff --git a/pkgs/tools/networking/dnscrypt-proxy2/default.nix b/pkgs/tools/networking/dnscrypt-proxy2/default.nix
index 3526562e11c8..8aedb4032608 100644
--- a/pkgs/tools/networking/dnscrypt-proxy2/default.nix
+++ b/pkgs/tools/networking/dnscrypt-proxy2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "dnscrypt-proxy2";
diff --git a/pkgs/tools/networking/dnsproxy/default.nix b/pkgs/tools/networking/dnsproxy/default.nix
index a04244642ba5..718606fdfa68 100644
--- a/pkgs/tools/networking/dnsproxy/default.nix
+++ b/pkgs/tools/networking/dnsproxy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoModule }:
+{ lib, fetchFromGitHub, buildGoModule }:
 
 buildGoModule rec {
   pname = "dnsproxy";
diff --git a/pkgs/tools/networking/filegive/default.nix b/pkgs/tools/networking/filegive/default.nix
index 3ed250ca4bcd..1d7bf884edd5 100644
--- a/pkgs/tools/networking/filegive/default.nix
+++ b/pkgs/tools/networking/filegive/default.nix
@@ -1,4 +1,4 @@
-{ buildGoPackage, lib, stdenv, fetchurl }:
+{ buildGoPackage, lib, fetchurl }:
 
 buildGoPackage rec {
   name = "filegive-0.7.4";
diff --git a/pkgs/tools/networking/getmail/default.nix b/pkgs/tools/networking/getmail/default.nix
index d994d9d8cec9..4e20cbe74410 100644
--- a/pkgs/tools/networking/getmail/default.nix
+++ b/pkgs/tools/networking/getmail/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, python2Packages }:
+{ lib, fetchurl, python2Packages }:
 
 python2Packages.buildPythonApplication rec {
   pname = "getmail";
diff --git a/pkgs/tools/networking/goklp/default.nix b/pkgs/tools/networking/goklp/default.nix
index 78117a700bd3..10c5c8ea64fe 100644
--- a/pkgs/tools/networking/goklp/default.nix
+++ b/pkgs/tools/networking/goklp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "goklp";
diff --git a/pkgs/tools/networking/goreplay/default.nix b/pkgs/tools/networking/goreplay/default.nix
index 564c45d2e144..14d0a16366ba 100644
--- a/pkgs/tools/networking/goreplay/default.nix
+++ b/pkgs/tools/networking/goreplay/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, libpcap }:
+{ lib, buildGoPackage, fetchFromGitHub, libpcap }:
 
 buildGoPackage rec {
   pname = "goreplay";
diff --git a/pkgs/tools/networking/http-prompt/default.nix b/pkgs/tools/networking/http-prompt/default.nix
index 59a3bffdc6db..3732fbd879f5 100644
--- a/pkgs/tools/networking/http-prompt/default.nix
+++ b/pkgs/tools/networking/http-prompt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages, httpie }:
+{ lib, fetchFromGitHub, python3Packages, httpie }:
 
 python3Packages.buildPythonApplication rec {
   pname = "http-prompt";
diff --git a/pkgs/tools/networking/httpie/default.nix b/pkgs/tools/networking/httpie/default.nix
index 66513819ab89..c5e12317fd7d 100644
--- a/pkgs/tools/networking/httpie/default.nix
+++ b/pkgs/tools/networking/httpie/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages, docutils, fetchpatch }:
+{ lib, fetchFromGitHub, python3Packages, docutils, fetchpatch }:
 
 python3Packages.buildPythonApplication rec {
   pname = "httpie";
diff --git a/pkgs/tools/networking/httplab/default.nix b/pkgs/tools/networking/httplab/default.nix
index 22dc500fd4cd..40851d370c79 100644
--- a/pkgs/tools/networking/httplab/default.nix
+++ b/pkgs/tools/networking/httplab/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "httplab";
diff --git a/pkgs/tools/networking/httpstat/default.nix b/pkgs/tools/networking/httpstat/default.nix
index a8b9630aab21..27c2a145a659 100644
--- a/pkgs/tools/networking/httpstat/default.nix
+++ b/pkgs/tools/networking/httpstat/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, curl, pythonPackages, glibcLocales }:
+{ lib, fetchFromGitHub, curl, pythonPackages, glibcLocales }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "httpstat";
diff --git a/pkgs/tools/networking/ipgrep/default.nix b/pkgs/tools/networking/ipgrep/default.nix
index dd85a5dcb617..d1f5316c27b4 100644
--- a/pkgs/tools/networking/ipgrep/default.nix
+++ b/pkgs/tools/networking/ipgrep/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   version = "1.0.1";
diff --git a/pkgs/tools/networking/kail/default.nix b/pkgs/tools/networking/kail/default.nix
index 2ddcd6c7d4bf..ae431b329eaf 100644
--- a/pkgs/tools/networking/kail/default.nix
+++ b/pkgs/tools/networking/kail/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "kail";
diff --git a/pkgs/tools/networking/minio-client/default.nix b/pkgs/tools/networking/minio-client/default.nix
index 3145f85186b9..9d667d0ee1dc 100644
--- a/pkgs/tools/networking/minio-client/default.nix
+++ b/pkgs/tools/networking/minio-client/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "minio-client";
diff --git a/pkgs/tools/networking/offlineimap/default.nix b/pkgs/tools/networking/offlineimap/default.nix
index 698046358e38..0de96169769a 100644
--- a/pkgs/tools/networking/offlineimap/default.nix
+++ b/pkgs/tools/networking/offlineimap/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python2Packages,
+{ lib, fetchFromGitHub, python2Packages,
   asciidoc, cacert, libxml2, libxslt, docbook_xsl }:
 
 python2Packages.buildPythonApplication rec {
diff --git a/pkgs/tools/networking/persepolis/default.nix b/pkgs/tools/networking/persepolis/default.nix
index 2ebec34b219a..5e4f0542d364 100644
--- a/pkgs/tools/networking/persepolis/default.nix
+++ b/pkgs/tools/networking/persepolis/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonApplication, fetchFromGitHub, makeWrapper
+{ lib, buildPythonApplication, fetchFromGitHub, makeWrapper
 , aria
 , libnotify
 , pulseaudio
diff --git a/pkgs/tools/networking/photon/default.nix b/pkgs/tools/networking/photon/default.nix
index 55dedc09bea5..d3f153e44aed 100644
--- a/pkgs/tools/networking/photon/default.nix
+++ b/pkgs/tools/networking/photon/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, fetchFromGitHub }:
+{ lib, python3Packages, fetchFromGitHub }:
 
 python3Packages.buildPythonApplication rec {
   pname = "photon";
diff --git a/pkgs/tools/networking/pirate-get/default.nix b/pkgs/tools/networking/pirate-get/default.nix
index 76b77da1764b..dc9133229af7 100644
--- a/pkgs/tools/networking/pirate-get/default.nix
+++ b/pkgs/tools/networking/pirate-get/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages }:
+{ lib, python3Packages }:
 
 with python3Packages;
 
diff --git a/pkgs/tools/networking/pixiecore/default.nix b/pkgs/tools/networking/pixiecore/default.nix
index ec275c5e6a81..6155d411e13b 100644
--- a/pkgs/tools/networking/pixiecore/default.nix
+++ b/pkgs/tools/networking/pixiecore/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "pixiecore";
diff --git a/pkgs/tools/networking/polysh/default.nix b/pkgs/tools/networking/polysh/default.nix
index 68cb8fed57a0..69e5d0427e58 100644
--- a/pkgs/tools/networking/polysh/default.nix
+++ b/pkgs/tools/networking/polysh/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, python2Packages }:
+{ lib, fetchurl, python2Packages }:
 
 let
   inherit (python2Packages) buildPythonApplication;
diff --git a/pkgs/tools/networking/proxify/default.nix b/pkgs/tools/networking/proxify/default.nix
index 7f45d53d41d1..6a0bfcc6ee22 100644
--- a/pkgs/tools/networking/proxify/default.nix
+++ b/pkgs/tools/networking/proxify/default.nix
@@ -1,6 +1,6 @@
 { buildGoModule
 , fetchFromGitHub
-, lib, stdenv
+, lib
 }:
 
 buildGoModule rec {
diff --git a/pkgs/tools/networking/pssh/default.nix b/pkgs/tools/networking/pssh/default.nix
index b2b08cea8443..a17701644c87 100644
--- a/pkgs/tools/networking/pssh/default.nix
+++ b/pkgs/tools/networking/pssh/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, pythonPackages, openssh, rsync }:
+{ lib, fetchFromGitHub, pythonPackages, openssh, rsync }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "pssh";
diff --git a/pkgs/tools/networking/pykms/default.nix b/pkgs/tools/networking/pykms/default.nix
index f856f591bf48..0d001e7aeef1 100644
--- a/pkgs/tools/networking/pykms/default.nix
+++ b/pkgs/tools/networking/pykms/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, runtimeShell, fetchFromGitHub, python3, writeText, writeScript
+{ lib, runtimeShell, fetchFromGitHub, python3, writeText, writeScript
 , coreutils, sqlite }:
 
 with python3.pkgs;
diff --git a/pkgs/tools/networking/s3cmd/default.nix b/pkgs/tools/networking/s3cmd/default.nix
index 06f51b0c5063..15f6ff3dfa0c 100644
--- a/pkgs/tools/networking/s3cmd/default.nix
+++ b/pkgs/tools/networking/s3cmd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonApplication, fetchFromGitHub, python_magic, dateutil }:
+{ lib, buildPythonApplication, fetchFromGitHub, python_magic, dateutil }:
 
 buildPythonApplication rec {
   pname = "s3cmd";
diff --git a/pkgs/tools/networking/s3gof3r/default.nix b/pkgs/tools/networking/s3gof3r/default.nix
index 390b35b0297f..4623b68ad4cf 100644
--- a/pkgs/tools/networking/s3gof3r/default.nix
+++ b/pkgs/tools/networking/s3gof3r/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   pname = "s3gof3r";
diff --git a/pkgs/tools/networking/s4cmd/default.nix b/pkgs/tools/networking/s4cmd/default.nix
index 80874649072a..95dc02cb5cd4 100644
--- a/pkgs/tools/networking/s4cmd/default.nix
+++ b/pkgs/tools/networking/s4cmd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages }:
+{ lib, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   pname = "s4cmd";
diff --git a/pkgs/tools/networking/shadowfox/default.nix b/pkgs/tools/networking/shadowfox/default.nix
index c7507925f5f8..e6b1c823eb88 100644
--- a/pkgs/tools/networking/shadowfox/default.nix
+++ b/pkgs/tools/networking/shadowfox/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoModule }:
+{ lib, fetchFromGitHub, buildGoModule }:
 
 buildGoModule rec {
   pname = "shadowfox";
diff --git a/pkgs/tools/networking/subfinder/default.nix b/pkgs/tools/networking/subfinder/default.nix
index 4474cba6aee0..2844cc2dac08 100644
--- a/pkgs/tools/networking/subfinder/default.nix
+++ b/pkgs/tools/networking/subfinder/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "subfinder";
diff --git a/pkgs/tools/networking/tdns-cli/default.nix b/pkgs/tools/networking/tdns-cli/default.nix
index 0ed7922874dc..9d786d60b12e 100644
--- a/pkgs/tools/networking/tdns-cli/default.nix
+++ b/pkgs/tools/networking/tdns-cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage rec {
   name = "tdns-cli";
diff --git a/pkgs/tools/networking/tendermint/default.nix b/pkgs/tools/networking/tendermint/default.nix
index bd280e75379d..36269327e815 100644
--- a/pkgs/tools/networking/tendermint/default.nix
+++ b/pkgs/tools/networking/tendermint/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoModule }:
+{ lib, fetchFromGitHub, buildGoModule }:
 
 buildGoModule rec {
   pname = "tendermint";
diff --git a/pkgs/tools/networking/termshark/default.nix b/pkgs/tools/networking/termshark/default.nix
index f4e790fea36f..65ba8d17bcb4 100644
--- a/pkgs/tools/networking/termshark/default.nix
+++ b/pkgs/tools/networking/termshark/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, makeWrapper, buildGoModule, wireshark-cli }:
+{ lib, fetchFromGitHub, makeWrapper, buildGoModule, wireshark-cli }:
 
 buildGoModule rec {
   pname = "termshark";
diff --git a/pkgs/tools/networking/tox-node/default.nix b/pkgs/tools/networking/tox-node/default.nix
index 85fcea008de0..3ef125382b68 100644
--- a/pkgs/tools/networking/tox-node/default.nix
+++ b/pkgs/tools/networking/tox-node/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, rustPlatform, fetchFromGitHub
+{ lib, rustPlatform, fetchFromGitHub
 , libsodium, openssl
 , pkg-config
 }:
diff --git a/pkgs/tools/networking/ua/default.nix b/pkgs/tools/networking/ua/default.nix
index 69bc3fc409b7..feb17b283de5 100644
--- a/pkgs/tools/networking/ua/default.nix
+++ b/pkgs/tools/networking/ua/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchgit
+{ lib, buildGoPackage, fetchgit
 , pkg-config
 , glib, libxml2
 }:
diff --git a/pkgs/tools/networking/urlwatch/default.nix b/pkgs/tools/networking/urlwatch/default.nix
index 10bbc963a28d..1cea3989ed26 100644
--- a/pkgs/tools/networking/urlwatch/default.nix
+++ b/pkgs/tools/networking/urlwatch/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   pname = "urlwatch";
diff --git a/pkgs/tools/networking/waitron/default.nix b/pkgs/tools/networking/waitron/default.nix
index 7efe7018d318..8364cd5763dc 100644
--- a/pkgs/tools/networking/waitron/default.nix
+++ b/pkgs/tools/networking/waitron/default.nix
@@ -1,5 +1,5 @@
 # This file was generated by https://github.com/kamilchm/go2nix v1.3.0
-{ lib, stdenv, buildGoPackage, fetchgit, fetchhg, fetchbzr, fetchsvn }:
+{ lib, buildGoPackage, fetchgit, fetchhg, fetchbzr, fetchsvn }:
 
 buildGoPackage rec {
   name = "waitron-unstable-${version}";
diff --git a/pkgs/tools/networking/wifite2/default.nix b/pkgs/tools/networking/wifite2/default.nix
index 3b1c3f14ac53..054b77f8c9b8 100644
--- a/pkgs/tools/networking/wifite2/default.nix
+++ b/pkgs/tools/networking/wifite2/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, fetchpatch, python3, wirelesstools
+{ lib, fetchFromGitHub, fetchpatch, python3, wirelesstools
 , aircrack-ng, wireshark-cli, reaverwps-t6x, cowpatty, hashcat, hcxtools
 , hcxdumptool, pyrit, which }:
 
diff --git a/pkgs/tools/networking/wireguard-go/default.nix b/pkgs/tools/networking/wireguard-go/default.nix
index 100de62683db..35c5371113c1 100644
--- a/pkgs/tools/networking/wireguard-go/default.nix
+++ b/pkgs/tools/networking/wireguard-go/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchzip }:
+{ lib, buildGoPackage, fetchzip }:
 
 buildGoPackage rec {
   pname = "wireguard-go";
diff --git a/pkgs/tools/networking/wormhole-william/default.nix b/pkgs/tools/networking/wormhole-william/default.nix
index 6476d4f43b1e..48f842f60ced 100644
--- a/pkgs/tools/networking/wormhole-william/default.nix
+++ b/pkgs/tools/networking/wormhole-william/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "wormhole-william";
diff --git a/pkgs/tools/networking/wstunnel/default.nix b/pkgs/tools/networking/wstunnel/default.nix
index 161b08a7d39e..a851dcd4ead5 100644
--- a/pkgs/tools/networking/wstunnel/default.nix
+++ b/pkgs/tools/networking/wstunnel/default.nix
@@ -1,6 +1,6 @@
 { mkDerivation, async, base, base64-bytestring, binary, bytestring
 , classy-prelude, cmdargs, connection, hslogger, mtl, network
-, network-conduit-tls, stdenv, streaming-commons, text
+, network-conduit-tls, streaming-commons, text
 , unordered-containers, websockets
 , hspec, iproute
 , lib, fetchFromGitHub, fetchpatch
diff --git a/pkgs/tools/networking/wuzz/default.nix b/pkgs/tools/networking/wuzz/default.nix
index 73db27f1a942..156841be3344 100644
--- a/pkgs/tools/networking/wuzz/default.nix
+++ b/pkgs/tools/networking/wuzz/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "wuzz";
diff --git a/pkgs/tools/networking/yrd/default.nix b/pkgs/tools/networking/yrd/default.nix
index 7f946718588b..75a89b859fe8 100644
--- a/pkgs/tools/networking/yrd/default.nix
+++ b/pkgs/tools/networking/yrd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, pythonPackages }:
+{ lib, fetchFromGitHub, pythonPackages }:
 
 let
   pname = "yrd";
diff --git a/pkgs/tools/nix/cached-nix-shell/default.nix b/pkgs/tools/nix/cached-nix-shell/default.nix
index b495a3026188..853bf87346f2 100644
--- a/pkgs/tools/nix/cached-nix-shell/default.nix
+++ b/pkgs/tools/nix/cached-nix-shell/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, openssl, pkg-config, ronn, rustPlatform }:
+{ lib, fetchFromGitHub, openssl, pkg-config, ronn, rustPlatform }:
 
 let
   blake3-src = fetchFromGitHub {
diff --git a/pkgs/tools/nix/nar-serve/default.nix b/pkgs/tools/nix/nar-serve/default.nix
index 4b0239a2fa23..146165d880de 100644
--- a/pkgs/tools/nix/nar-serve/default.nix
+++ b/pkgs/tools/nix/nar-serve/default.nix
@@ -1,7 +1,7 @@
 { buildGoModule
 , fetchFromGitHub
 , lib
-, stdenv
+
 }:
 let
   pname = "nar-serve";
diff --git a/pkgs/tools/nix/nix-output-monitor/default.nix b/pkgs/tools/nix/nix-output-monitor/default.nix
index 38e2b060c0c1..b177b9a233ad 100644
--- a/pkgs/tools/nix/nix-output-monitor/default.nix
+++ b/pkgs/tools/nix/nix-output-monitor/default.nix
@@ -1,5 +1,5 @@
 { mkDerivation, ansi-terminal, async, attoparsec, base, containers
-, directory, HUnit, mtl, nix-derivation, process, relude, lib, stdenv
+, directory, HUnit, mtl, nix-derivation, process, relude, lib
 , stm, text, time, unix, fetchFromGitHub
 }:
 mkDerivation {
diff --git a/pkgs/tools/nix/nix-query-tree-viewer/default.nix b/pkgs/tools/nix/nix-query-tree-viewer/default.nix
index f820f36e49f8..353aafa2a7e4 100644
--- a/pkgs/tools/nix/nix-query-tree-viewer/default.nix
+++ b/pkgs/tools/nix/nix-query-tree-viewer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform, glib, gtk3, wrapGAppsHook }:
+{ lib, fetchFromGitHub, rustPlatform, glib, gtk3, wrapGAppsHook }:
 
 rustPlatform.buildRustPackage rec {
   pname = "nix-query-tree-viewer";
diff --git a/pkgs/tools/package-management/cargo-kcov/default.nix b/pkgs/tools/package-management/cargo-kcov/default.nix
index 6b825919b60f..8b2dbe3e4892 100644
--- a/pkgs/tools/package-management/cargo-kcov/default.nix
+++ b/pkgs/tools/package-management/cargo-kcov/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , rustPlatform
 , fetchFromGitHub
 }:
diff --git a/pkgs/tools/package-management/gx/default.nix b/pkgs/tools/package-management/gx/default.nix
index 920b23f36abf..60fbdd4941f7 100644
--- a/pkgs/tools/package-management/gx/default.nix
+++ b/pkgs/tools/package-management/gx/default.nix
@@ -1,5 +1,5 @@
 # This file was generated by go2nix.
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "gx";
diff --git a/pkgs/tools/package-management/gx/go/default.nix b/pkgs/tools/package-management/gx/go/default.nix
index dd14976e6332..ad4435c9e2d3 100644
--- a/pkgs/tools/package-management/gx/go/default.nix
+++ b/pkgs/tools/package-management/gx/go/default.nix
@@ -1,5 +1,5 @@
 # This file was generated by go2nix.
-{ lib, stdenv, buildGoPackage, fetchFromGitHub
+{ lib, buildGoPackage, fetchFromGitHub
 , gx
 }:
 
diff --git a/pkgs/tools/package-management/mynewt-newt/default.nix b/pkgs/tools/package-management/mynewt-newt/default.nix
index 2390c33ca031..dd5c36019f20 100644
--- a/pkgs/tools/package-management/mynewt-newt/default.nix
+++ b/pkgs/tools/package-management/mynewt-newt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, fetchpatch }:
+{ lib, buildGoModule, fetchFromGitHub, fetchpatch }:
 
 buildGoModule rec {
   pname = "mynewt-newt";
diff --git a/pkgs/tools/package-management/nix-doc/default.nix b/pkgs/tools/package-management/nix-doc/default.nix
index 66691d9f5c5a..695cd2976d88 100644
--- a/pkgs/tools/package-management/nix-doc/default.nix
+++ b/pkgs/tools/package-management/nix-doc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, rustPlatform, fetchFromGitHub, boost, nix, pkg-config }:
+{ lib, rustPlatform, fetchFromGitHub, boost, nix, pkg-config }:
 
 rustPlatform.buildRustPackage rec {
   pname = "nix-doc";
diff --git a/pkgs/tools/package-management/nix-simple-deploy/default.nix b/pkgs/tools/package-management/nix-simple-deploy/default.nix
index 47734f73fd65..91f9a39514b6 100644
--- a/pkgs/tools/package-management/nix-simple-deploy/default.nix
+++ b/pkgs/tools/package-management/nix-simple-deploy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage rec {
   pname = "nix-simple-deploy";
diff --git a/pkgs/tools/package-management/nixpkgs-review/default.nix b/pkgs/tools/package-management/nixpkgs-review/default.nix
index b1a86f3137e4..d3fcac6277f5 100644
--- a/pkgs/tools/package-management/nixpkgs-review/default.nix
+++ b/pkgs/tools/package-management/nixpkgs-review/default.nix
@@ -1,9 +1,8 @@
-{ stdenv
+{ lib
 , python3
 , fetchFromGitHub
 , nixFlakes
 , git
-, lib
 }:
 
 python3.pkgs.buildPythonApplication rec {
diff --git a/pkgs/tools/package-management/python2nix/default.nix b/pkgs/tools/package-management/python2nix/default.nix
index 3cce599c052a..b6ffe9abc024 100644
--- a/pkgs/tools/package-management/python2nix/default.nix
+++ b/pkgs/tools/package-management/python2nix/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, pythonPackages }:
+{ lib, fetchFromGitHub, pythonPackages }:
 
 pythonPackages.buildPythonApplication {
   name = "python2nix-20140927";
diff --git a/pkgs/tools/security/2fa/default.nix b/pkgs/tools/security/2fa/default.nix
index c8518ef0a9fb..b06454e736c8 100644
--- a/pkgs/tools/security/2fa/default.nix
+++ b/pkgs/tools/security/2fa/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   version = "1.2.0";
diff --git a/pkgs/tools/security/aws-iam-authenticator/default.nix b/pkgs/tools/security/aws-iam-authenticator/default.nix
index 851eed43adef..e0499681848b 100644
--- a/pkgs/tools/security/aws-iam-authenticator/default.nix
+++ b/pkgs/tools/security/aws-iam-authenticator/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "aws-iam-authenticator";
diff --git a/pkgs/tools/security/aws-okta/default.nix b/pkgs/tools/security/aws-okta/default.nix
index 73d95f52b8cf..08508dd157a0 100644
--- a/pkgs/tools/security/aws-okta/default.nix
+++ b/pkgs/tools/security/aws-okta/default.nix
@@ -1,4 +1,4 @@
-{ buildGoPackage, fetchFromGitHub, libusb1, pkg-config, lib, stdenv, libiconv }:
+{ buildGoPackage, fetchFromGitHub, libusb1, pkg-config, lib, libiconv }:
 
 buildGoPackage rec {
   pname = "aws-okta";
diff --git a/pkgs/tools/security/certmgr/default.nix b/pkgs/tools/security/certmgr/default.nix
index 47848b25b435..e2318c853f11 100644
--- a/pkgs/tools/security/certmgr/default.nix
+++ b/pkgs/tools/security/certmgr/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, fetchpatch }:
+{ lib, buildGoPackage, fetchFromGitHub, fetchpatch }:
 
 let
   generic = { patches ? [] }:
diff --git a/pkgs/tools/security/certstrap/default.nix b/pkgs/tools/security/certstrap/default.nix
index f0c756f54f9d..ff6522f1d35f 100644
--- a/pkgs/tools/security/certstrap/default.nix
+++ b/pkgs/tools/security/certstrap/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "certstrap";
diff --git a/pkgs/tools/security/cfssl/default.nix b/pkgs/tools/security/cfssl/default.nix
index 835c5daa72c5..e92fe7b951f6 100644
--- a/pkgs/tools/security/cfssl/default.nix
+++ b/pkgs/tools/security/cfssl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, go-rice }:
+{ lib, buildGoModule, fetchFromGitHub, go-rice }:
 
 buildGoModule rec {
   pname = "cfssl";
diff --git a/pkgs/tools/security/chrome-token-signing/default.nix b/pkgs/tools/security/chrome-token-signing/default.nix
index 4966c6412ab6..5c2e6b4de152 100644
--- a/pkgs/tools/security/chrome-token-signing/default.nix
+++ b/pkgs/tools/security/chrome-token-signing/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, qmake, pcsclite, pkg-config, opensc }:
+{ lib, mkDerivation, fetchFromGitHub, qmake, pcsclite, pkg-config, opensc }:
 
 mkDerivation rec {
   pname = "chrome-token-signing";
diff --git a/pkgs/tools/security/cloudbrute/default.nix b/pkgs/tools/security/cloudbrute/default.nix
index 06f0dd413a5f..84a59ec495f2 100644
--- a/pkgs/tools/security/cloudbrute/default.nix
+++ b/pkgs/tools/security/cloudbrute/default.nix
@@ -1,6 +1,6 @@
 { buildGoModule
 , fetchFromGitHub
-, lib, stdenv
+, lib
 }:
 
 buildGoModule rec {
diff --git a/pkgs/tools/security/creddump/default.nix b/pkgs/tools/security/creddump/default.nix
index 7a936408433a..e9e5685acf4a 100644
--- a/pkgs/tools/security/creddump/default.nix
+++ b/pkgs/tools/security/creddump/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitLab, python2, python2Packages }:
+{ lib, fetchFromGitLab, python2, python2Packages }:
 
 python2Packages.buildPythonApplication rec {
   pname = "creddump";
diff --git a/pkgs/tools/security/crlfuzz/default.nix b/pkgs/tools/security/crlfuzz/default.nix
index feddd893cece..88bd45bb5e16 100644
--- a/pkgs/tools/security/crlfuzz/default.nix
+++ b/pkgs/tools/security/crlfuzz/default.nix
@@ -1,6 +1,6 @@
 { buildGoModule
 , fetchFromGitHub
-, lib, stdenv
+, lib
 }:
 
 buildGoModule rec {
diff --git a/pkgs/tools/security/crowbar/default.nix b/pkgs/tools/security/crowbar/default.nix
index 2f197421e1f7..e58f77457de2 100644
--- a/pkgs/tools/security/crowbar/default.nix
+++ b/pkgs/tools/security/crowbar/default.nix
@@ -3,7 +3,7 @@
 , nmap
 , openvpn
 , python3Packages
-, lib, stdenv
+, lib
 , tigervnc
 }:
 
diff --git a/pkgs/tools/security/deepsea/default.nix b/pkgs/tools/security/deepsea/default.nix
index 855549bb0c81..e351eb7a79d4 100644
--- a/pkgs/tools/security/deepsea/default.nix
+++ b/pkgs/tools/security/deepsea/default.nix
@@ -1,6 +1,6 @@
 { buildGoModule
 , fetchFromGitHub
-, lib, stdenv
+, lib
 }:
 
 buildGoModule rec {
diff --git a/pkgs/tools/security/dnsrecon/default.nix b/pkgs/tools/security/dnsrecon/default.nix
index 65b18c5c8226..5eda4e75f94b 100644
--- a/pkgs/tools/security/dnsrecon/default.nix
+++ b/pkgs/tools/security/dnsrecon/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3 }:
+{ lib, fetchFromGitHub, python3 }:
 
 python3.pkgs.buildPythonApplication rec {
   pname = "dnsrecon";
diff --git a/pkgs/tools/security/dnsx/default.nix b/pkgs/tools/security/dnsx/default.nix
index 1a82467201df..35f033cb983f 100644
--- a/pkgs/tools/security/dnsx/default.nix
+++ b/pkgs/tools/security/dnsx/default.nix
@@ -1,6 +1,6 @@
 { buildGoModule
 , fetchFromGitHub
-, lib, stdenv
+, lib
 }:
 
 buildGoModule rec {
diff --git a/pkgs/tools/security/ffuf/default.nix b/pkgs/tools/security/ffuf/default.nix
index 084601a41222..46995e284417 100644
--- a/pkgs/tools/security/ffuf/default.nix
+++ b/pkgs/tools/security/ffuf/default.nix
@@ -1,6 +1,6 @@
 { buildGoModule
 , fetchFromGitHub
-, lib, stdenv
+, lib
 }:
 
 buildGoModule rec {
diff --git a/pkgs/tools/security/fido2luks/default.nix b/pkgs/tools/security/fido2luks/default.nix
index e0dcdadb7b07..f8c5b4a9f12f 100644
--- a/pkgs/tools/security/fido2luks/default.nix
+++ b/pkgs/tools/security/fido2luks/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , rustPlatform
 , fetchFromGitHub
 , cryptsetup
diff --git a/pkgs/tools/security/fierce/default.nix b/pkgs/tools/security/fierce/default.nix
index 3d6472cbb44f..797a2db211b2 100644
--- a/pkgs/tools/security/fierce/default.nix
+++ b/pkgs/tools/security/fierce/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3 }:
+{ lib, fetchFromGitHub, python3 }:
 
 python3.pkgs.buildPythonApplication rec {
   pname = "fierce";
diff --git a/pkgs/tools/security/gau/default.nix b/pkgs/tools/security/gau/default.nix
index 98045a107e50..46498e49cffe 100644
--- a/pkgs/tools/security/gau/default.nix
+++ b/pkgs/tools/security/gau/default.nix
@@ -1,6 +1,6 @@
 { buildGoModule
 , fetchFromGitHub
-, lib, stdenv
+, lib
 }:
 
 buildGoModule rec {
diff --git a/pkgs/tools/security/gnome-keysign/default.nix b/pkgs/tools/security/gnome-keysign/default.nix
index db0e88a805ba..a94be8295ea0 100644
--- a/pkgs/tools/security/gnome-keysign/default.nix
+++ b/pkgs/tools/security/gnome-keysign/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitLab
 , fetchpatch
 , python3
diff --git a/pkgs/tools/security/gospider/default.nix b/pkgs/tools/security/gospider/default.nix
index f32ecdc94e65..f4b750d394a0 100644
--- a/pkgs/tools/security/gospider/default.nix
+++ b/pkgs/tools/security/gospider/default.nix
@@ -1,6 +1,6 @@
 { buildGoModule
 , fetchFromGitHub
-, lib, stdenv
+, lib
 }:
 
 buildGoModule rec {
diff --git a/pkgs/tools/security/grype/default.nix b/pkgs/tools/security/grype/default.nix
index 495302139855..ac896c4d55be 100644
--- a/pkgs/tools/security/grype/default.nix
+++ b/pkgs/tools/security/grype/default.nix
@@ -1,7 +1,7 @@
 { buildGoModule
 , docker
 , fetchFromGitHub
-, lib, stdenv
+, lib
 }:
 
 buildGoModule rec {
diff --git a/pkgs/tools/security/hologram/default.nix b/pkgs/tools/security/hologram/default.nix
index 6ec4d7776e1f..9c1c896d889d 100644
--- a/pkgs/tools/security/hologram/default.nix
+++ b/pkgs/tools/security/hologram/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "hologram-2018-03-19";
diff --git a/pkgs/tools/security/httpx/default.nix b/pkgs/tools/security/httpx/default.nix
index 7135baab3759..bff9e03bc6f4 100644
--- a/pkgs/tools/security/httpx/default.nix
+++ b/pkgs/tools/security/httpx/default.nix
@@ -1,6 +1,6 @@
 { buildGoModule
 , fetchFromGitHub
-, lib, stdenv
+, lib
 }:
 
 buildGoModule rec {
diff --git a/pkgs/tools/security/keybase/kbfs.nix b/pkgs/tools/security/keybase/kbfs.nix
index 6916d6b99bd8..67abb57394cd 100644
--- a/pkgs/tools/security/keybase/kbfs.nix
+++ b/pkgs/tools/security/keybase/kbfs.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, keybase }:
+{ lib, buildGoPackage, fetchFromGitHub, keybase }:
 
 buildGoPackage {
   pname = "kbfs";
diff --git a/pkgs/tools/security/knockknock/default.nix b/pkgs/tools/security/knockknock/default.nix
index 7a00f183f15d..960667e72def 100644
--- a/pkgs/tools/security/knockknock/default.nix
+++ b/pkgs/tools/security/knockknock/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python2Packages, hping }:
+{ lib, fetchFromGitHub, python2Packages, hping }:
 let
   rev  = "bf14bbff";
 in python2Packages.buildPythonApplication rec {
diff --git a/pkgs/tools/security/lesspass-cli/default.nix b/pkgs/tools/security/lesspass-cli/default.nix
index 20473d1003e4..ce64b6847fe2 100644
--- a/pkgs/tools/security/lesspass-cli/default.nix
+++ b/pkgs/tools/security/lesspass-cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3, fetchFromGitHub }:
+{ lib, python3, fetchFromGitHub }:
 
 let
   inherit (python3.pkgs) buildPythonApplication pytest mock pexpect;
diff --git a/pkgs/tools/security/notary/default.nix b/pkgs/tools/security/notary/default.nix
index fa3db0c3623c..ab6ec0b16818 100644
--- a/pkgs/tools/security/notary/default.nix
+++ b/pkgs/tools/security/notary/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoPackage, libtool }:
+{ lib, fetchFromGitHub, buildGoPackage, libtool }:
 
 buildGoPackage rec {
   pname = "notary";
diff --git a/pkgs/tools/security/nuclei/default.nix b/pkgs/tools/security/nuclei/default.nix
index 7e9d3d52e56b..2df24e63d894 100644
--- a/pkgs/tools/security/nuclei/default.nix
+++ b/pkgs/tools/security/nuclei/default.nix
@@ -1,6 +1,6 @@
 { buildGoModule
 , fetchFromGitHub
-, lib, stdenv
+, lib
 }:
 
 buildGoModule rec {
diff --git a/pkgs/tools/security/onioncircuits/default.nix b/pkgs/tools/security/onioncircuits/default.nix
index bdaf087004a1..8c5083ee8af6 100644
--- a/pkgs/tools/security/onioncircuits/default.nix
+++ b/pkgs/tools/security/onioncircuits/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit, python3, intltool, gtk3, gobject-introspection, gnome3 }:
+{ lib, fetchgit, python3, intltool, gtk3, gobject-introspection, gnome3 }:
 
 python3.pkgs.buildPythonApplication rec {
   pname = "onioncircuits";
diff --git a/pkgs/tools/security/pius/default.nix b/pkgs/tools/security/pius/default.nix
index 7d038a1aeabb..3612caa196c2 100644
--- a/pkgs/tools/security/pius/default.nix
+++ b/pkgs/tools/security/pius/default.nix
@@ -1,4 +1,4 @@
-{ fetchFromGitHub, lib, stdenv, python3Packages, gnupg, perl }:
+{ fetchFromGitHub, lib, python3Packages, gnupg, perl }:
 
 let version = "3.0.0"; in
 python3Packages.buildPythonApplication {
diff --git a/pkgs/tools/security/pyrit/default.nix b/pkgs/tools/security/pyrit/default.nix
index ead55036425f..dc1d0b97f879 100644
--- a/pkgs/tools/security/pyrit/default.nix
+++ b/pkgs/tools/security/pyrit/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, python2Packages, openssl, zlib, libpcap, opencl-headers, ocl-icd }:
+{ lib, fetchFromGitHub, python2Packages, openssl, zlib, libpcap, opencl-headers, ocl-icd }:
 
 let
   version = "2019-12-13";
diff --git a/pkgs/tools/security/qdigidoc/default.nix b/pkgs/tools/security/qdigidoc/default.nix
index 2b769ee0a15c..8ba6937c4486 100644
--- a/pkgs/tools/security/qdigidoc/default.nix
+++ b/pkgs/tools/security/qdigidoc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchgit, fetchurl, cmake, darkhttpd, gettext, makeWrapper, pkg-config
+{ lib, mkDerivation, fetchgit, fetchurl, cmake, darkhttpd, gettext, makeWrapper, pkg-config
 , libdigidocpp, opensc, openldap, openssl, pcsclite, qtbase, qttranslations, qtsvg }:
 
 mkDerivation rec {
diff --git a/pkgs/tools/security/safe/default.nix b/pkgs/tools/security/safe/default.nix
index 2f0f4501fd2f..503cfbd9e868 100644
--- a/pkgs/tools/security/safe/default.nix
+++ b/pkgs/tools/security/safe/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildGoPackage
 , fetchFromGitHub
 }:
diff --git a/pkgs/tools/security/saml2aws/default.nix b/pkgs/tools/security/saml2aws/default.nix
index ade299ec5893..57a92ef4b996 100644
--- a/pkgs/tools/security/saml2aws/default.nix
+++ b/pkgs/tools/security/saml2aws/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "saml2aws";
diff --git a/pkgs/tools/security/sops/default.nix b/pkgs/tools/security/sops/default.nix
index 9eddc308a4ff..ae6f000fe3f7 100644
--- a/pkgs/tools/security/sops/default.nix
+++ b/pkgs/tools/security/sops/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "sops";
diff --git a/pkgs/tools/security/subjs/default.nix b/pkgs/tools/security/subjs/default.nix
index 5b9a237d49cb..1b7986c0a77a 100644
--- a/pkgs/tools/security/subjs/default.nix
+++ b/pkgs/tools/security/subjs/default.nix
@@ -1,6 +1,6 @@
 { buildGoModule
 , fetchFromGitHub
-, lib, stdenv
+, lib
 }:
 
 buildGoModule rec {
diff --git a/pkgs/tools/security/sudolikeaboss/default.nix b/pkgs/tools/security/sudolikeaboss/default.nix
index bdaf8f129d02..53f99636b458 100644
--- a/pkgs/tools/security/sudolikeaboss/default.nix
+++ b/pkgs/tools/security/sudolikeaboss/default.nix
@@ -1,5 +1,5 @@
 # This file was generated by go2nix, then modified by hand for Darwin support.
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, darwin }:
+{ lib, buildGoPackage, fetchFromGitHub, darwin }:
 
 buildGoPackage rec {
   pname = "sudolikeaboss-unstable";
diff --git a/pkgs/tools/security/teler/default.nix b/pkgs/tools/security/teler/default.nix
index 1acb9e5609eb..4a971243ad1b 100644
--- a/pkgs/tools/security/teler/default.nix
+++ b/pkgs/tools/security/teler/default.nix
@@ -1,6 +1,6 @@
 { buildGoModule
 , fetchFromGitHub
-, lib, stdenv
+, lib
 }:
 
 buildGoModule rec {
diff --git a/pkgs/tools/security/urlhunter/default.nix b/pkgs/tools/security/urlhunter/default.nix
index 3364b622ad63..ebc628e563c6 100644
--- a/pkgs/tools/security/urlhunter/default.nix
+++ b/pkgs/tools/security/urlhunter/default.nix
@@ -1,6 +1,6 @@
 { buildGoModule
 , fetchFromGitHub
-, lib, stdenv
+, lib
 }:
 
 buildGoModule rec {
diff --git a/pkgs/tools/security/vault/default.nix b/pkgs/tools/security/vault/default.nix
index 3af00b9a22b3..4d9893e103f9 100644
--- a/pkgs/tools/security/vault/default.nix
+++ b/pkgs/tools/security/vault/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoPackage, installShellFiles, nixosTests }:
+{ lib, fetchFromGitHub, buildGoPackage, installShellFiles, nixosTests }:
 
 buildGoPackage rec {
   pname = "vault";
diff --git a/pkgs/tools/security/volatility/default.nix b/pkgs/tools/security/volatility/default.nix
index 80cd0d971a3f..6cc5ddbfb4cf 100644
--- a/pkgs/tools/security/volatility/default.nix
+++ b/pkgs/tools/security/volatility/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, pythonPackages }:
+{ lib, fetchFromGitHub, pythonPackages }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "volatility";
diff --git a/pkgs/tools/security/vulnix/default.nix b/pkgs/tools/security/vulnix/default.nix
index e95adf3e1e6c..a7ce0fb4b6e4 100644
--- a/pkgs/tools/security/vulnix/default.nix
+++ b/pkgs/tools/security/vulnix/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , python3Packages
 , nix
 , ronn
diff --git a/pkgs/tools/system/auto-cpufreq/default.nix b/pkgs/tools/system/auto-cpufreq/default.nix
index 5a94cff19e16..b4bef5fc5e39 100644
--- a/pkgs/tools/system/auto-cpufreq/default.nix
+++ b/pkgs/tools/system/auto-cpufreq/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, fetchFromGitHub }:
+{ lib, python3Packages, fetchFromGitHub }:
 
 python3Packages.buildPythonPackage rec {
   pname = "auto-cpufreq";
diff --git a/pkgs/tools/system/awstats/default.nix b/pkgs/tools/system/awstats/default.nix
index b04532d842ff..88162780cb70 100644
--- a/pkgs/tools/system/awstats/default.nix
+++ b/pkgs/tools/system/awstats/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, perlPackages, jdk }:
+{ lib, fetchurl, perlPackages, jdk }:
 
 perlPackages.buildPerlPackage rec {
   pname = "awstats";
diff --git a/pkgs/tools/system/cm-rgb/default.nix b/pkgs/tools/system/cm-rgb/default.nix
index 9c75fe78c996..47fdba50c5e8 100644
--- a/pkgs/tools/system/cm-rgb/default.nix
+++ b/pkgs/tools/system/cm-rgb/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonApplication
 , fetchFromGitHub
 , atk
diff --git a/pkgs/tools/system/consul-template/default.nix b/pkgs/tools/system/consul-template/default.nix
index 7604584e1675..a285c720eaaa 100644
--- a/pkgs/tools/system/consul-template/default.nix
+++ b/pkgs/tools/system/consul-template/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "consul-template";
diff --git a/pkgs/tools/system/envconsul/default.nix b/pkgs/tools/system/envconsul/default.nix
index 1706b32449eb..9e8180b318a6 100644
--- a/pkgs/tools/system/envconsul/default.nix
+++ b/pkgs/tools/system/envconsul/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "envconsul";
diff --git a/pkgs/tools/system/gdu/default.nix b/pkgs/tools/system/gdu/default.nix
index 53e69cd8cd6a..0ade0443dc0e 100644
--- a/pkgs/tools/system/gdu/default.nix
+++ b/pkgs/tools/system/gdu/default.nix
@@ -1,5 +1,5 @@
 { lib
-, stdenv
+
 , buildGoModule
 , fetchFromGitHub
 , installShellFiles
diff --git a/pkgs/tools/system/gotop/default.nix b/pkgs/tools/system/gotop/default.nix
index b49307f500f6..3acace9eaae3 100644
--- a/pkgs/tools/system/gotop/default.nix
+++ b/pkgs/tools/system/gotop/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "gotop";
diff --git a/pkgs/tools/system/honcho/default.nix b/pkgs/tools/system/honcho/default.nix
index f39c7dd793c4..b653f2407244 100644
--- a/pkgs/tools/system/honcho/default.nix
+++ b/pkgs/tools/system/honcho/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, pythonPackages }:
+{ lib, fetchFromGitHub, pythonPackages }:
 
 let
   inherit (pythonPackages) python;
diff --git a/pkgs/tools/system/journalwatch/default.nix b/pkgs/tools/system/journalwatch/default.nix
index 0ec7ef36623e..3d85d13149c3 100644
--- a/pkgs/tools/system/journalwatch/default.nix
+++ b/pkgs/tools/system/journalwatch/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, pythonOlder, systemd, pytest }:
+{ lib, buildPythonPackage, fetchFromGitHub, pythonOlder, systemd, pytest }:
 
 buildPythonPackage rec {
   pname = "journalwatch";
diff --git a/pkgs/tools/system/localtime/default.nix b/pkgs/tools/system/localtime/default.nix
index 99e0674016b6..798e3b3e8831 100644
--- a/pkgs/tools/system/localtime/default.nix
+++ b/pkgs/tools/system/localtime/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoPackage, m4 }:
+{ lib, fetchFromGitHub, buildGoPackage, m4 }:
 
 buildGoPackage rec {
   name = "localtime-2017-11-07";
diff --git a/pkgs/tools/system/pcstat/default.nix b/pkgs/tools/system/pcstat/default.nix
index 9e0f6fe147e6..d01b08a14343 100644
--- a/pkgs/tools/system/pcstat/default.nix
+++ b/pkgs/tools/system/pcstat/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage {
   pname = "pcstat-unstable";
diff --git a/pkgs/tools/system/ps_mem/default.nix b/pkgs/tools/system/ps_mem/default.nix
index dcca1a86da74..152bb1150e59 100644
--- a/pkgs/tools/system/ps_mem/default.nix
+++ b/pkgs/tools/system/ps_mem/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, pythonPackages, fetchFromGitHub }:
+{ lib, pythonPackages, fetchFromGitHub }:
 
 let
   version = "3.13";
diff --git a/pkgs/tools/system/s-tui/default.nix b/pkgs/tools/system/s-tui/default.nix
index 51c47ab10507..3943a8f4eef8 100644
--- a/pkgs/tools/system/s-tui/default.nix
+++ b/pkgs/tools/system/s-tui/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages }:
+{ lib, python3Packages }:
 
 python3Packages.buildPythonPackage rec {
   pname = "s-tui";
diff --git a/pkgs/tools/system/s6-rc/default.nix b/pkgs/tools/system/s6-rc/default.nix
index 30467926f5df..20c23e150519 100644
--- a/pkgs/tools/system/s6-rc/default.nix
+++ b/pkgs/tools/system/s6-rc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, skawarePackages }:
+{ lib, skawarePackages }:
 
 with skawarePackages;
 
diff --git a/pkgs/tools/system/systemd-journal2gelf/default.nix b/pkgs/tools/system/systemd-journal2gelf/default.nix
index 7ac5d7cf210f..62a7c9d8aeae 100644
--- a/pkgs/tools/system/systemd-journal2gelf/default.nix
+++ b/pkgs/tools/system/systemd-journal2gelf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "SystemdJournal2Gelf-unstable";
diff --git a/pkgs/tools/system/tre-command/default.nix b/pkgs/tools/system/tre-command/default.nix
index 5a2ad41c7447..638caa3c62bc 100644
--- a/pkgs/tools/system/tre-command/default.nix
+++ b/pkgs/tools/system/tre-command/default.nix
@@ -1,4 +1,4 @@
-{ rustPlatform, fetchFromGitHub, lib, stdenv, installShellFiles }:
+{ rustPlatform, fetchFromGitHub, lib, installShellFiles }:
 
 rustPlatform.buildRustPackage rec {
   pname = "tre-command";
diff --git a/pkgs/tools/text/angle-grinder/default.nix b/pkgs/tools/text/angle-grinder/default.nix
index 82ca3ff0f603..66441d737132 100644
--- a/pkgs/tools/text/angle-grinder/default.nix
+++ b/pkgs/tools/text/angle-grinder/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , rustPlatform
 }:
diff --git a/pkgs/tools/text/choose/default.nix b/pkgs/tools/text/choose/default.nix
index 20d651df008e..7816f79649c3 100644
--- a/pkgs/tools/text/choose/default.nix
+++ b/pkgs/tools/text/choose/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , rustPlatform
 }:
diff --git a/pkgs/tools/text/codesearch/default.nix b/pkgs/tools/text/codesearch/default.nix
index bdb273de372b..9c3e9fbd8409 100644
--- a/pkgs/tools/text/codesearch/default.nix
+++ b/pkgs/tools/text/codesearch/default.nix
@@ -1,5 +1,5 @@
 # This file was generated by go2nix.
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   pname = "codesearch";
diff --git a/pkgs/tools/text/fanficfare/default.nix b/pkgs/tools/text/fanficfare/default.nix
index ad92ffa9350b..e1db7d3d39c0 100644
--- a/pkgs/tools/text/fanficfare/default.nix
+++ b/pkgs/tools/text/fanficfare/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages }:
+{ lib, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   pname = "FanFicFare";
diff --git a/pkgs/tools/text/gjo/default.nix b/pkgs/tools/text/gjo/default.nix
index 27dcf633fe7a..0ab9a54c47b7 100644
--- a/pkgs/tools/text/gjo/default.nix
+++ b/pkgs/tools/text/gjo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildGoModule
 , fetchFromGitHub
 }:
diff --git a/pkgs/tools/text/grin/default.nix b/pkgs/tools/text/grin/default.nix
index dd3568ef0bbe..5d89619001b4 100644
--- a/pkgs/tools/text/grin/default.nix
+++ b/pkgs/tools/text/grin/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python2Packages }:
+{ lib, fetchFromGitHub, python2Packages }:
 
 python2Packages.buildPythonApplication rec {
   program = "grin";
diff --git a/pkgs/tools/text/gucci/default.nix b/pkgs/tools/text/gucci/default.nix
index 4e938787ff46..943b86d3b051 100644
--- a/pkgs/tools/text/gucci/default.nix
+++ b/pkgs/tools/text/gucci/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "gucci";
diff --git a/pkgs/tools/text/icdiff/default.nix b/pkgs/tools/text/icdiff/default.nix
index 07082c4c56f3..3ead56298cf6 100644
--- a/pkgs/tools/text/icdiff/default.nix
+++ b/pkgs/tools/text/icdiff/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, pythonPackages }:
+{ lib, fetchFromGitHub, pythonPackages }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "icdiff";
diff --git a/pkgs/tools/text/invoice2data/default.nix b/pkgs/tools/text/invoice2data/default.nix
index 87f3f3daff3b..8007724f4a53 100644
--- a/pkgs/tools/text/invoice2data/default.nix
+++ b/pkgs/tools/text/invoice2data/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, xpdf, imagemagick, tesseract }:
+{ lib, python3Packages, xpdf, imagemagick, tesseract }:
 
 python3Packages.buildPythonPackage rec {
   pname = "invoice2data";
diff --git a/pkgs/tools/text/markdown-pp/default.nix b/pkgs/tools/text/markdown-pp/default.nix
index 55febe117298..50ef560f6c3f 100644
--- a/pkgs/tools/text/markdown-pp/default.nix
+++ b/pkgs/tools/text/markdown-pp/default.nix
@@ -1,4 +1,4 @@
-{ fetchFromGitHub, pythonPackages, lib, stdenv }:
+{ fetchFromGitHub, pythonPackages, lib }:
 
 with pythonPackages;
 buildPythonApplication rec {
diff --git a/pkgs/tools/text/pbgopy/default.nix b/pkgs/tools/text/pbgopy/default.nix
index 5e1473f8a3c9..d4ed4eb0f03a 100644
--- a/pkgs/tools/text/pbgopy/default.nix
+++ b/pkgs/tools/text/pbgopy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "pbgopy";
diff --git a/pkgs/tools/text/platinum-searcher/default.nix b/pkgs/tools/text/platinum-searcher/default.nix
index 30e7e58345d6..ca89b7dc2d8a 100644
--- a/pkgs/tools/text/platinum-searcher/default.nix
+++ b/pkgs/tools/text/platinum-searcher/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "the_platinum_searcher";
diff --git a/pkgs/tools/text/proselint/default.nix b/pkgs/tools/text/proselint/default.nix
index ea72468dc693..143c43f660d1 100644
--- a/pkgs/tools/text/proselint/default.nix
+++ b/pkgs/tools/text/proselint/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, buildPythonApplication, click, future, six }:
+{ lib, fetchurl, buildPythonApplication, click, future, six }:
 
 buildPythonApplication rec {
   pname = "proselint";
diff --git a/pkgs/tools/text/rpl/default.nix b/pkgs/tools/text/rpl/default.nix
index f53a1d790806..97a30211621c 100644
--- a/pkgs/tools/text/rpl/default.nix
+++ b/pkgs/tools/text/rpl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, pythonPackages }:
+{ lib, fetchFromGitHub, pythonPackages }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "rpl";
diff --git a/pkgs/tools/text/schema2ldif/default.nix b/pkgs/tools/text/schema2ldif/default.nix
index 409bbc16a93f..84196ae11197 100644
--- a/pkgs/tools/text/schema2ldif/default.nix
+++ b/pkgs/tools/text/schema2ldif/default.nix
@@ -1,4 +1,6 @@
-{ lib, stdenv, fetchurl, makeWrapper, perlPackages }: stdenv.mkDerivation rec {
+{ lib, stdenv, fetchurl, makeWrapper, perlPackages }:
+
+stdenv.mkDerivation rec {
   pname = "schema2ldif";
   version = "1.3";
 
diff --git a/pkgs/tools/text/transifex-client/default.nix b/pkgs/tools/text/transifex-client/default.nix
index 411c9cb98998..a0f3ad1c5e37 100644
--- a/pkgs/tools/text/transifex-client/default.nix
+++ b/pkgs/tools/text/transifex-client/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonApplication, fetchPypi
+{ lib, buildPythonApplication, fetchPypi
 , python-slugify, requests, urllib3, six, setuptools }:
 
 buildPythonApplication rec {
diff --git a/pkgs/tools/text/xurls/default.nix b/pkgs/tools/text/xurls/default.nix
index b1fd02ca75bb..fa5418b45818 100644
--- a/pkgs/tools/text/xurls/default.nix
+++ b/pkgs/tools/text/xurls/default.nix
@@ -1,4 +1,4 @@
-{ buildGoPackage, lib, stdenv, fetchFromGitHub }:
+{ buildGoPackage, lib, fetchFromGitHub }:
 
 buildGoPackage rec {
   version = "2.2.0";
diff --git a/pkgs/tools/typesetting/mmark/default.nix b/pkgs/tools/typesetting/mmark/default.nix
index 70f7e8f53ca8..bc5ddcc9d751 100644
--- a/pkgs/tools/typesetting/mmark/default.nix
+++ b/pkgs/tools/typesetting/mmark/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "mmark";
diff --git a/pkgs/tools/typesetting/odpdown/default.nix b/pkgs/tools/typesetting/odpdown/default.nix
index 989f61f4592e..7b20d230b9f7 100644
--- a/pkgs/tools/typesetting/odpdown/default.nix
+++ b/pkgs/tools/typesetting/odpdown/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, pythonPackages, libreoffice }:
+{ lib, fetchurl, pythonPackages, libreoffice }:
 
 pythonPackages.buildPythonApplication rec {
 
diff --git a/pkgs/tools/typesetting/tikzit/default.nix b/pkgs/tools/typesetting/tikzit/default.nix
index 29fd21ed31fe..2f6d169d0cb5 100644
--- a/pkgs/tools/typesetting/tikzit/default.nix
+++ b/pkgs/tools/typesetting/tikzit/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, qmake, qttools, qtbase, poppler, flex, bison }:
+{ lib, mkDerivation, fetchFromGitHub, qmake, qttools, qtbase, poppler, flex, bison }:
 
 mkDerivation {
   pname = "tikzit";
diff --git a/pkgs/tools/video/vnc2flv/default.nix b/pkgs/tools/video/vnc2flv/default.nix
index ba28ef08c8f9..88ec2f22b89b 100644
--- a/pkgs/tools/video/vnc2flv/default.nix
+++ b/pkgs/tools/video/vnc2flv/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, pythonPackages }:
+{ lib, fetchurl, pythonPackages }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "vnc2flv";
diff --git a/pkgs/tools/virtualization/awless/default.nix b/pkgs/tools/virtualization/awless/default.nix
index 3faf90ab4ac6..061dd486e0d8 100644
--- a/pkgs/tools/virtualization/awless/default.nix
+++ b/pkgs/tools/virtualization/awless/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "awless";
diff --git a/pkgs/tools/virtualization/awsebcli/default.nix b/pkgs/tools/virtualization/awsebcli/default.nix
index fa8e96def24a..796ea36eacfd 100644
--- a/pkgs/tools/virtualization/awsebcli/default.nix
+++ b/pkgs/tools/virtualization/awsebcli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3, glibcLocales }:
+{ lib, python3, glibcLocales }:
 let
 
   localPython = python3.override {
diff --git a/pkgs/tools/virtualization/distrobuilder/default.nix b/pkgs/tools/virtualization/distrobuilder/default.nix
index a7de9ae8b595..d06a2b4a17ef 100644
--- a/pkgs/tools/virtualization/distrobuilder/default.nix
+++ b/pkgs/tools/virtualization/distrobuilder/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, pkg-config, buildGoPackage, fetchFromGitHub
+{ lib, pkg-config, buildGoPackage, fetchFromGitHub
 , makeWrapper, coreutils, gnupg, gnutar, squashfsTools, debootstrap
 }:
 
diff --git a/pkgs/tools/virtualization/euca2ools/default.nix b/pkgs/tools/virtualization/euca2ools/default.nix
index 371a867d4ddb..88e83f42733e 100644
--- a/pkgs/tools/virtualization/euca2ools/default.nix
+++ b/pkgs/tools/virtualization/euca2ools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit, python2Packages }:
+{ lib, fetchgit, python2Packages }:
 
 let
   inherit (python2Packages) buildPythonApplication boto m2crypto;
diff --git a/pkgs/tools/virtualization/marathonctl/default.nix b/pkgs/tools/virtualization/marathonctl/default.nix
index 6f036795e720..fe31c64952a5 100644
--- a/pkgs/tools/virtualization/marathonctl/default.nix
+++ b/pkgs/tools/virtualization/marathonctl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage {
   pname = "marathonctl-unstable";
diff --git a/pkgs/tools/virtualization/udocker/default.nix b/pkgs/tools/virtualization/udocker/default.nix
index c971dfcb1bd0..fb067de82125 100644
--- a/pkgs/tools/virtualization/udocker/default.nix
+++ b/pkgs/tools/virtualization/udocker/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, proot, patchelf, fakechroot, runc, simplejson, pycurl, coreutils, nose, mock, buildPythonApplication }:
+{ lib, fetchFromGitHub, proot, patchelf, fakechroot, runc, simplejson, pycurl, coreutils, nose, mock, buildPythonApplication }:
 
 buildPythonApplication rec {
 
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index e0d24da0ca8b..8b86a0631a06 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -19276,7 +19276,7 @@ in
       kernel = (if kernel' == pkgs.linux_latest then linux_latest_for_hardened else kernel').override overrides;
     in linuxPackagesFor (kernel.override {
       structuredExtraConfig = import ../os-specific/linux/kernel/hardened/config.nix {
-        inherit lib stdenv;
+        inherit lib;
         inherit (kernel) version;
       };
       kernelPatches = kernel.kernelPatches ++ [