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-rw-r--r--nixpkgs/nixos/modules/config/appstream.nix8
-rw-r--r--nixpkgs/nixos/modules/config/fonts/fontconfig-penultimate.nix292
-rw-r--r--nixpkgs/nixos/modules/config/fonts/fontconfig.nix110
-rw-r--r--nixpkgs/nixos/modules/config/krb5/default.nix34
-rw-r--r--nixpkgs/nixos/modules/config/no-x-libs.nix2
-rw-r--r--nixpkgs/nixos/modules/config/system-path.nix28
-rw-r--r--nixpkgs/nixos/modules/config/update-users-groups.pl61
-rw-r--r--nixpkgs/nixos/modules/config/users-groups.nix64
-rw-r--r--nixpkgs/nixos/modules/hardware/bladeRF.nix2
-rw-r--r--nixpkgs/nixos/modules/hardware/ckb-next.nix1
-rw-r--r--nixpkgs/nixos/modules/hardware/device-tree.nix175
-rw-r--r--nixpkgs/nixos/modules/hardware/logitech.nix94
-rw-r--r--nixpkgs/nixos/modules/hardware/onlykey.nix2
-rw-r--r--nixpkgs/nixos/modules/hardware/printers.nix2
-rw-r--r--nixpkgs/nixos/modules/hardware/system-76.nix56
-rw-r--r--nixpkgs/nixos/modules/hardware/tuxedo-keyboard.nix4
-rw-r--r--nixpkgs/nixos/modules/hardware/video/hidpi.nix16
-rw-r--r--nixpkgs/nixos/modules/hardware/video/nvidia.nix2
-rw-r--r--nixpkgs/nixos/modules/hardware/video/uvcvideo/default.nix2
-rw-r--r--nixpkgs/nixos/modules/hardware/xpadneo.nix29
-rw-r--r--nixpkgs/nixos/modules/i18n/input-method/ibus.nix2
-rw-r--r--nixpkgs/nixos/modules/i18n/input-method/uim.nix2
-rw-r--r--nixpkgs/nixos/modules/installer/cd-dvd/installation-cd-graphical-gnome.nix20
-rw-r--r--nixpkgs/nixos/modules/installer/cd-dvd/installation-cd-graphical-plasma5.nix4
-rw-r--r--nixpkgs/nixos/modules/installer/cd-dvd/iso-image.nix9
-rw-r--r--nixpkgs/nixos/modules/installer/cd-dvd/sd-image-aarch64.nix8
-rw-r--r--nixpkgs/nixos/modules/installer/cd-dvd/sd-image-armv7l-multiplatform.nix8
-rw-r--r--nixpkgs/nixos/modules/installer/cd-dvd/sd-image-raspberrypi.nix8
-rw-r--r--nixpkgs/nixos/modules/installer/cd-dvd/sd-image-raspberrypi4.nix7
-rw-r--r--nixpkgs/nixos/modules/installer/cd-dvd/sd-image.nix26
-rw-r--r--nixpkgs/nixos/modules/installer/cd-dvd/system-tarball-pc-readme.txt2
-rw-r--r--nixpkgs/nixos/modules/installer/tools/nix-fallback-paths.nix8
-rw-r--r--nixpkgs/nixos/modules/installer/tools/nixos-build-vms/nixos-build-vms.sh2
-rw-r--r--nixpkgs/nixos/modules/installer/tools/nixos-enter.sh2
-rw-r--r--nixpkgs/nixos/modules/installer/tools/nixos-generate-config.pl5
-rw-r--r--nixpkgs/nixos/modules/installer/tools/nixos-install.sh86
-rw-r--r--nixpkgs/nixos/modules/installer/tools/nixos-option/nixos-option.cc2
-rw-r--r--nixpkgs/nixos/modules/installer/tools/nixos-rebuild.sh53
-rw-r--r--nixpkgs/nixos/modules/installer/tools/nixos-version.sh2
-rw-r--r--nixpkgs/nixos/modules/installer/tools/tools.nix11
-rw-r--r--nixpkgs/nixos/modules/misc/documentation.nix38
-rw-r--r--nixpkgs/nixos/modules/misc/ids.nix16
-rw-r--r--nixpkgs/nixos/modules/misc/locate.nix2
-rw-r--r--nixpkgs/nixos/modules/misc/nixpkgs.nix2
-rw-r--r--nixpkgs/nixos/modules/module-list.nix39
-rw-r--r--nixpkgs/nixos/modules/profiles/base.nix1
-rw-r--r--nixpkgs/nixos/modules/profiles/demo.nix10
-rw-r--r--nixpkgs/nixos/modules/profiles/hardened.nix5
-rw-r--r--nixpkgs/nixos/modules/profiles/installation-device.nix15
-rw-r--r--nixpkgs/nixos/modules/programs/autojump.nix4
-rw-r--r--nixpkgs/nixos/modules/programs/ccache.nix2
-rw-r--r--nixpkgs/nixos/modules/programs/dconf.nix37
-rw-r--r--nixpkgs/nixos/modules/programs/environment.nix1
-rw-r--r--nixpkgs/nixos/modules/programs/fish.nix3
-rw-r--r--nixpkgs/nixos/modules/programs/freetds.nix4
-rw-r--r--nixpkgs/nixos/modules/programs/gnupg.nix3
-rw-r--r--nixpkgs/nixos/modules/programs/gpaste.nix2
-rw-r--r--nixpkgs/nixos/modules/programs/nm-applet.nix15
-rw-r--r--nixpkgs/nixos/modules/programs/qt5ct.nix2
-rw-r--r--nixpkgs/nixos/modules/programs/ssh.nix2
-rw-r--r--nixpkgs/nixos/modules/programs/steam.nix25
-rw-r--r--nixpkgs/nixos/modules/programs/tsm-client.nix4
-rw-r--r--nixpkgs/nixos/modules/programs/xss-lock.nix2
-rw-r--r--nixpkgs/nixos/modules/programs/zsh/oh-my-zsh.xml2
-rw-r--r--nixpkgs/nixos/modules/rename.nix11
-rw-r--r--nixpkgs/nixos/modules/security/acme.nix676
-rw-r--r--nixpkgs/nixos/modules/security/acme.xml20
-rw-r--r--nixpkgs/nixos/modules/security/apparmor.nix6
-rw-r--r--nixpkgs/nixos/modules/security/duosec.nix2
-rw-r--r--nixpkgs/nixos/modules/security/misc.nix14
-rw-r--r--nixpkgs/nixos/modules/security/pam.nix53
-rw-r--r--nixpkgs/nixos/modules/security/rngd.nix13
-rw-r--r--nixpkgs/nixos/modules/security/systemd-confinement.nix2
-rw-r--r--nixpkgs/nixos/modules/security/tpm2.nix1
-rw-r--r--nixpkgs/nixos/modules/security/wrappers/default.nix3
-rw-r--r--nixpkgs/nixos/modules/services/audio/icecast.nix6
-rw-r--r--nixpkgs/nixos/modules/services/audio/mpd.nix45
-rw-r--r--nixpkgs/nixos/modules/services/audio/roon-server.nix6
-rw-r--r--nixpkgs/nixos/modules/services/audio/snapserver.nix166
-rw-r--r--nixpkgs/nixos/modules/services/audio/spotifyd.nix2
-rw-r--r--nixpkgs/nixos/modules/services/backup/bacula.nix36
-rw-r--r--nixpkgs/nixos/modules/services/backup/borgbackup.xml30
-rw-r--r--nixpkgs/nixos/modules/services/backup/restic.nix66
-rw-r--r--nixpkgs/nixos/modules/services/backup/zfs-replication.nix2
-rw-r--r--nixpkgs/nixos/modules/services/backup/znapzend.nix4
-rw-r--r--nixpkgs/nixos/modules/services/cluster/kubernetes/pki.nix5
-rw-r--r--nixpkgs/nixos/modules/services/computing/slurm/slurm.nix4
-rw-r--r--nixpkgs/nixos/modules/services/computing/torque/mom.nix2
-rw-r--r--nixpkgs/nixos/modules/services/computing/torque/server.nix2
-rw-r--r--nixpkgs/nixos/modules/services/continuous-integration/buildbot/master.nix10
-rw-r--r--nixpkgs/nixos/modules/services/continuous-integration/buildbot/worker.nix11
-rw-r--r--nixpkgs/nixos/modules/services/continuous-integration/gitlab-runner.nix93
-rw-r--r--nixpkgs/nixos/modules/services/continuous-integration/hercules-ci-agent/common.nix213
-rw-r--r--nixpkgs/nixos/modules/services/continuous-integration/hercules-ci-agent/default.nix86
-rw-r--r--nixpkgs/nixos/modules/services/databases/couchdb.nix25
-rw-r--r--nixpkgs/nixos/modules/services/databases/mysql.nix260
-rw-r--r--nixpkgs/nixos/modules/services/databases/openldap.nix30
-rw-r--r--nixpkgs/nixos/modules/services/databases/postgresql.nix143
-rw-r--r--nixpkgs/nixos/modules/services/databases/riak-cs.nix2
-rw-r--r--nixpkgs/nixos/modules/services/databases/victoriametrics.nix4
-rw-r--r--nixpkgs/nixos/modules/services/desktops/deepin/deepin.nix123
-rw-r--r--nixpkgs/nixos/modules/services/desktops/espanso.nix25
-rw-r--r--nixpkgs/nixos/modules/services/desktops/flatpak.nix1
-rw-r--r--nixpkgs/nixos/modules/services/desktops/geoclue2.nix2
-rw-r--r--nixpkgs/nixos/modules/services/desktops/malcontent.nix5
-rw-r--r--nixpkgs/nixos/modules/services/development/jupyter/default.nix28
-rw-r--r--nixpkgs/nixos/modules/services/development/jupyterhub/default.nix190
-rw-r--r--nixpkgs/nixos/modules/services/development/lorri.nix13
-rw-r--r--nixpkgs/nixos/modules/services/editors/emacs.nix47
-rw-r--r--nixpkgs/nixos/modules/services/editors/emacs.xml14
-rw-r--r--nixpkgs/nixos/modules/services/games/minetest-server.nix16
-rw-r--r--nixpkgs/nixos/modules/services/games/terraria.nix20
-rw-r--r--nixpkgs/nixos/modules/services/hardware/fancontrol.nix2
-rw-r--r--nixpkgs/nixos/modules/services/hardware/sane_extra_backends/brscan4.nix2
-rw-r--r--nixpkgs/nixos/modules/services/hardware/thermald.nix10
-rw-r--r--nixpkgs/nixos/modules/services/hardware/thinkfan.nix2
-rw-r--r--nixpkgs/nixos/modules/services/hardware/tlp.nix59
-rw-r--r--nixpkgs/nixos/modules/services/hardware/trezord.nix4
-rw-r--r--nixpkgs/nixos/modules/services/hardware/undervolt.nix25
-rw-r--r--nixpkgs/nixos/modules/services/logging/logrotate.nix146
-rw-r--r--nixpkgs/nixos/modules/services/logging/logstash.nix6
-rw-r--r--nixpkgs/nixos/modules/services/mail/dovecot.nix33
-rw-r--r--nixpkgs/nixos/modules/services/mail/mailhog.nix68
-rw-r--r--nixpkgs/nixos/modules/services/mail/mailman.nix80
-rw-r--r--nixpkgs/nixos/modules/services/mail/opendkim.nix30
-rw-r--r--nixpkgs/nixos/modules/services/mail/pfix-srsd.nix2
-rw-r--r--nixpkgs/nixos/modules/services/mail/postfix.nix90
-rw-r--r--nixpkgs/nixos/modules/services/mail/roundcube.nix18
-rw-r--r--nixpkgs/nixos/modules/services/misc/beanstalkd.nix10
-rw-r--r--nixpkgs/nixos/modules/services/misc/calibre-server.nix49
-rw-r--r--nixpkgs/nixos/modules/services/misc/gammu-smsd.nix2
-rw-r--r--nixpkgs/nixos/modules/services/misc/gitea.nix144
-rw-r--r--nixpkgs/nixos/modules/services/misc/gitlab.nix85
-rw-r--r--nixpkgs/nixos/modules/services/misc/gitlab.xml6
-rw-r--r--nixpkgs/nixos/modules/services/misc/gitolite.nix33
-rw-r--r--nixpkgs/nixos/modules/services/misc/gollum.nix9
-rw-r--r--nixpkgs/nixos/modules/services/misc/home-assistant.nix1
-rw-r--r--nixpkgs/nixos/modules/services/misc/jellyfin.nix15
-rw-r--r--nixpkgs/nixos/modules/services/misc/mathics.nix54
-rw-r--r--nixpkgs/nixos/modules/services/misc/matrix-synapse.nix2
-rw-r--r--nixpkgs/nixos/modules/services/misc/matrix-synapse.xml38
-rw-r--r--nixpkgs/nixos/modules/services/misc/mautrix-telegram.nix2
-rw-r--r--nixpkgs/nixos/modules/services/misc/mesos-master.nix125
-rw-r--r--nixpkgs/nixos/modules/services/misc/mesos-slave.nix220
-rw-r--r--nixpkgs/nixos/modules/services/misc/nix-daemon.nix164
-rw-r--r--nixpkgs/nixos/modules/services/misc/octoprint.nix4
-rw-r--r--nixpkgs/nixos/modules/services/misc/pinnwand.nix78
-rw-r--r--nixpkgs/nixos/modules/services/misc/redmine.nix102
-rw-r--r--nixpkgs/nixos/modules/services/misc/siproxd.nix8
-rw-r--r--nixpkgs/nixos/modules/services/misc/ssm-agent.nix6
-rw-r--r--nixpkgs/nixos/modules/services/misc/sssd.nix4
-rw-r--r--nixpkgs/nixos/modules/services/misc/tzupdate.nix4
-rw-r--r--nixpkgs/nixos/modules/services/misc/zigbee2mqtt.nix98
-rw-r--r--nixpkgs/nixos/modules/services/monitoring/cadvisor.nix2
-rw-r--r--nixpkgs/nixos/modules/services/monitoring/datadog-agent.nix24
-rw-r--r--nixpkgs/nixos/modules/services/monitoring/dd-agent/dd-agent.nix4
-rw-r--r--nixpkgs/nixos/modules/services/monitoring/do-agent.nix17
-rw-r--r--nixpkgs/nixos/modules/services/monitoring/monit.nix2
-rw-r--r--nixpkgs/nixos/modules/services/monitoring/netdata.nix45
-rw-r--r--nixpkgs/nixos/modules/services/monitoring/prometheus/default.nix42
-rw-r--r--nixpkgs/nixos/modules/services/monitoring/prometheus/exporters.nix14
-rw-r--r--nixpkgs/nixos/modules/services/monitoring/prometheus/exporters/modemmanager.nix33
-rw-r--r--nixpkgs/nixos/modules/services/monitoring/prometheus/exporters/unifi-poller.nix34
-rw-r--r--nixpkgs/nixos/modules/services/monitoring/smartd.nix18
-rw-r--r--nixpkgs/nixos/modules/services/monitoring/teamviewer.nix2
-rw-r--r--nixpkgs/nixos/modules/services/monitoring/tuptime.nix9
-rw-r--r--nixpkgs/nixos/modules/services/monitoring/unifi-poller.nix242
-rw-r--r--nixpkgs/nixos/modules/services/monitoring/zabbix-agent.nix41
-rw-r--r--nixpkgs/nixos/modules/services/monitoring/zabbix-proxy.nix75
-rw-r--r--nixpkgs/nixos/modules/services/monitoring/zabbix-server.nix72
-rw-r--r--nixpkgs/nixos/modules/services/network-filesystems/cachefilesd.nix18
-rw-r--r--nixpkgs/nixos/modules/services/network-filesystems/ipfs.nix22
-rw-r--r--nixpkgs/nixos/modules/services/network-filesystems/orangefs/server.nix4
-rw-r--r--nixpkgs/nixos/modules/services/network-filesystems/samba.nix2
-rw-r--r--nixpkgs/nixos/modules/services/networking/biboumi.nix269
-rw-r--r--nixpkgs/nixos/modules/services/networking/bitcoind.nix206
-rw-r--r--nixpkgs/nixos/modules/services/networking/blockbook-frontend.nix275
-rw-r--r--nixpkgs/nixos/modules/services/networking/corerad.nix3
-rw-r--r--nixpkgs/nixos/modules/services/networking/dhcpd.nix12
-rw-r--r--nixpkgs/nixos/modules/services/networking/gateone.nix2
-rw-r--r--nixpkgs/nixos/modules/services/networking/heyefi.nix82
-rw-r--r--nixpkgs/nixos/modules/services/networking/hylafax/options.nix4
-rw-r--r--nixpkgs/nixos/modules/services/networking/jicofo.nix152
-rw-r--r--nixpkgs/nixos/modules/services/networking/jitsi-videobridge.nix276
-rw-r--r--nixpkgs/nixos/modules/services/networking/kresd.nix13
-rw-r--r--nixpkgs/nixos/modules/services/networking/monero.nix2
-rw-r--r--nixpkgs/nixos/modules/services/networking/mstpd.nix2
-rw-r--r--nixpkgs/nixos/modules/services/networking/namecoind.nix2
-rw-r--r--nixpkgs/nixos/modules/services/networking/ncdns.nix278
-rw-r--r--nixpkgs/nixos/modules/services/networking/networkmanager.nix2
-rw-r--r--nixpkgs/nixos/modules/services/networking/nextdns.nix44
-rw-r--r--nixpkgs/nixos/modules/services/networking/nghttpx/default.nix6
-rw-r--r--nixpkgs/nixos/modules/services/networking/nsd.nix7
-rw-r--r--nixpkgs/nixos/modules/services/networking/ntp/chrony.nix1
-rw-r--r--nixpkgs/nixos/modules/services/networking/nylon.nix2
-rw-r--r--nixpkgs/nixos/modules/services/networking/onedrive.nix72
-rw-r--r--nixpkgs/nixos/modules/services/networking/onedrive.xml34
-rw-r--r--nixpkgs/nixos/modules/services/networking/openvpn.nix2
-rw-r--r--nixpkgs/nixos/modules/services/networking/prosody.nix4
-rw-r--r--nixpkgs/nixos/modules/services/networking/prosody.xml13
-rw-r--r--nixpkgs/nixos/modules/services/networking/radicale.nix11
-rw-r--r--nixpkgs/nixos/modules/services/networking/resilio.nix20
-rw-r--r--nixpkgs/nixos/modules/services/networking/robustirc-bridge.nix47
-rw-r--r--nixpkgs/nixos/modules/services/networking/seeks.nix75
-rw-r--r--nixpkgs/nixos/modules/services/networking/shadowsocks.nix54
-rw-r--r--nixpkgs/nixos/modules/services/networking/skydns.nix2
-rw-r--r--nixpkgs/nixos/modules/services/networking/ssh/sshd.nix12
-rw-r--r--nixpkgs/nixos/modules/services/networking/sslh.nix18
-rw-r--r--nixpkgs/nixos/modules/services/networking/supplicant.nix26
-rw-r--r--nixpkgs/nixos/modules/services/networking/syncthing.nix13
-rw-r--r--nixpkgs/nixos/modules/services/networking/tinc.nix16
-rw-r--r--nixpkgs/nixos/modules/services/networking/trickster.nix5
-rw-r--r--nixpkgs/nixos/modules/services/networking/unifi.nix2
-rw-r--r--nixpkgs/nixos/modules/services/networking/wasabibackend.nix158
-rw-r--r--nixpkgs/nixos/modules/services/networking/websockify.nix6
-rw-r--r--nixpkgs/nixos/modules/services/networking/wg-quick.nix20
-rw-r--r--nixpkgs/nixos/modules/services/networking/wireguard.nix15
-rw-r--r--nixpkgs/nixos/modules/services/networking/wpa_supplicant.nix5
-rw-r--r--nixpkgs/nixos/modules/services/networking/xandikos.nix4
-rw-r--r--nixpkgs/nixos/modules/services/networking/yggdrasil.nix5
-rw-r--r--nixpkgs/nixos/modules/services/networking/yggdrasil.xml157
-rw-r--r--nixpkgs/nixos/modules/services/scheduling/chronos.nix54
-rw-r--r--nixpkgs/nixos/modules/services/scheduling/marathon.nix98
-rw-r--r--nixpkgs/nixos/modules/services/security/bitwarden_rs/default.nix19
-rw-r--r--nixpkgs/nixos/modules/services/security/haveged.nix18
-rw-r--r--nixpkgs/nixos/modules/services/security/nginx-sso.nix11
-rw-r--r--nixpkgs/nixos/modules/services/security/oauth2_proxy.nix12
-rw-r--r--nixpkgs/nixos/modules/services/security/physlock.nix10
-rw-r--r--nixpkgs/nixos/modules/services/security/privacyidea.nix1
-rw-r--r--nixpkgs/nixos/modules/services/security/tor.nix24
-rw-r--r--nixpkgs/nixos/modules/services/security/usbguard.nix124
-rw-r--r--nixpkgs/nixos/modules/services/security/yubikey-agent.nix60
-rw-r--r--nixpkgs/nixos/modules/services/system/earlyoom.nix1
-rw-r--r--nixpkgs/nixos/modules/services/torrent/transmission.nix451
-rw-r--r--nixpkgs/nixos/modules/services/video/epgstation/default.nix295
-rwxr-xr-xnixpkgs/nixos/modules/services/video/epgstation/generate31
-rw-r--r--nixpkgs/nixos/modules/services/video/epgstation/streaming.json119
-rw-r--r--nixpkgs/nixos/modules/services/video/mirakurun.nix183
-rw-r--r--nixpkgs/nixos/modules/services/wayland/cage.nix3
-rw-r--r--nixpkgs/nixos/modules/services/web-apps/codimd.nix43
-rw-r--r--nixpkgs/nixos/modules/services/web-apps/convos.nix72
-rw-r--r--nixpkgs/nixos/modules/services/web-apps/dokuwiki.nix28
-rw-r--r--nixpkgs/nixos/modules/services/web-apps/gerrit.nix21
-rw-r--r--nixpkgs/nixos/modules/services/web-apps/jitsi-meet.nix334
-rw-r--r--nixpkgs/nixos/modules/services/web-apps/jitsi-meet.xml55
-rw-r--r--nixpkgs/nixos/modules/services/web-apps/moodle.nix14
-rw-r--r--nixpkgs/nixos/modules/services/web-apps/nextcloud.nix277
-rw-r--r--nixpkgs/nixos/modules/services/web-apps/nextcloud.xml67
-rw-r--r--nixpkgs/nixos/modules/services/web-apps/pgpkeyserver-lite.nix2
-rw-r--r--nixpkgs/nixos/modules/services/web-apps/rss-bridge.nix127
-rw-r--r--nixpkgs/nixos/modules/services/web-apps/sogo.nix1
-rw-r--r--nixpkgs/nixos/modules/services/web-apps/trilium.nix2
-rw-r--r--nixpkgs/nixos/modules/services/web-apps/tt-rss.nix2
-rw-r--r--nixpkgs/nixos/modules/services/web-servers/apache-httpd/default.nix109
-rw-r--r--nixpkgs/nixos/modules/services/web-servers/caddy.nix66
-rw-r--r--nixpkgs/nixos/modules/services/web-servers/jboss/builder.sh12
-rw-r--r--nixpkgs/nixos/modules/services/web-servers/meguca.nix174
-rw-r--r--nixpkgs/nixos/modules/services/web-servers/molly-brown.nix117
-rw-r--r--nixpkgs/nixos/modules/services/web-servers/nginx/default.nix105
-rw-r--r--nixpkgs/nixos/modules/services/web-servers/phpfpm/default.nix1
-rw-r--r--nixpkgs/nixos/modules/services/web-servers/shellinabox.nix2
-rw-r--r--nixpkgs/nixos/modules/services/web-servers/unit/default.nix5
-rw-r--r--nixpkgs/nixos/modules/services/x11/colord.nix2
-rw-r--r--nixpkgs/nixos/modules/services/x11/desktop-managers/cinnamon.nix205
-rw-r--r--nixpkgs/nixos/modules/services/x11/desktop-managers/default.nix1
-rw-r--r--nixpkgs/nixos/modules/services/x11/desktop-managers/pantheon.nix2
-rw-r--r--nixpkgs/nixos/modules/services/x11/desktop-managers/plasma5.nix20
-rw-r--r--nixpkgs/nixos/modules/services/x11/display-managers/default.nix64
-rw-r--r--nixpkgs/nixos/modules/services/x11/display-managers/gdm.nix74
-rw-r--r--nixpkgs/nixos/modules/services/x11/display-managers/lightdm-greeters/pantheon.nix2
-rw-r--r--nixpkgs/nixos/modules/services/x11/display-managers/lightdm.nix66
-rw-r--r--nixpkgs/nixos/modules/services/x11/display-managers/sddm.nix63
-rw-r--r--nixpkgs/nixos/modules/services/x11/imwheel.nix3
-rw-r--r--nixpkgs/nixos/modules/services/x11/picom.nix13
-rw-r--r--nixpkgs/nixos/modules/services/x11/urserver.nix38
-rw-r--r--nixpkgs/nixos/modules/services/x11/window-managers/qtile.nix2
-rw-r--r--nixpkgs/nixos/modules/services/x11/window-managers/xmonad.nix30
-rw-r--r--nixpkgs/nixos/modules/services/x11/xserver.nix20
-rw-r--r--nixpkgs/nixos/modules/system/activation/top-level.nix25
-rw-r--r--nixpkgs/nixos/modules/system/boot/emergency-mode.nix2
-rw-r--r--nixpkgs/nixos/modules/system/boot/initrd-network.nix2
-rw-r--r--nixpkgs/nixos/modules/system/boot/initrd-openvpn.nix81
-rw-r--r--nixpkgs/nixos/modules/system/boot/kernel_config.nix2
-rw-r--r--nixpkgs/nixos/modules/system/boot/loader/generations-dir/generations-dir-builder.sh2
-rw-r--r--nixpkgs/nixos/modules/system/boot/loader/generic-extlinux-compatible/default.nix29
-rw-r--r--nixpkgs/nixos/modules/system/boot/loader/generic-extlinux-compatible/extlinux-conf-builder.sh17
-rw-r--r--nixpkgs/nixos/modules/system/boot/loader/grub/grub.nix106
-rw-r--r--nixpkgs/nixos/modules/system/boot/loader/grub/install-grub.pl163
-rw-r--r--nixpkgs/nixos/modules/system/boot/loader/init-script/init-script-builder.sh2
-rw-r--r--nixpkgs/nixos/modules/system/boot/loader/raspberrypi/raspberrypi-builder.nix4
-rw-r--r--nixpkgs/nixos/modules/system/boot/loader/raspberrypi/raspberrypi-builder.sh5
-rw-r--r--nixpkgs/nixos/modules/system/boot/loader/systemd-boot/systemd-boot-builder.py8
-rw-r--r--nixpkgs/nixos/modules/system/boot/loader/systemd-boot/systemd-boot.nix4
-rw-r--r--nixpkgs/nixos/modules/system/boot/luksroot.nix38
-rw-r--r--nixpkgs/nixos/modules/system/boot/modprobe.nix2
-rw-r--r--nixpkgs/nixos/modules/system/boot/networkd.nix1492
-rw-r--r--nixpkgs/nixos/modules/system/boot/plymouth.nix3
-rw-r--r--nixpkgs/nixos/modules/system/boot/stage-1-init.sh23
-rw-r--r--nixpkgs/nixos/modules/system/boot/stage-1.nix30
-rw-r--r--nixpkgs/nixos/modules/system/boot/stage-2-init.sh2
-rw-r--r--nixpkgs/nixos/modules/system/boot/stage-2.nix10
-rw-r--r--nixpkgs/nixos/modules/system/boot/systemd-nspawn.nix6
-rw-r--r--nixpkgs/nixos/modules/system/boot/systemd-unit-options.nix12
-rw-r--r--nixpkgs/nixos/modules/system/boot/systemd.nix157
-rw-r--r--nixpkgs/nixos/modules/system/boot/tmp.nix2
-rw-r--r--nixpkgs/nixos/modules/system/etc/etc.nix2
-rw-r--r--nixpkgs/nixos/modules/system/etc/make-etc.sh7
-rw-r--r--nixpkgs/nixos/modules/tasks/auto-upgrade.nix98
-rw-r--r--nixpkgs/nixos/modules/tasks/bcache.nix2
-rw-r--r--nixpkgs/nixos/modules/tasks/encrypted-devices.nix21
-rw-r--r--nixpkgs/nixos/modules/tasks/filesystems.nix4
-rw-r--r--nixpkgs/nixos/modules/tasks/filesystems/btrfs.nix5
-rw-r--r--nixpkgs/nixos/modules/tasks/filesystems/zfs.nix51
-rw-r--r--nixpkgs/nixos/modules/tasks/lvm.nix67
-rw-r--r--nixpkgs/nixos/modules/tasks/network-interfaces-scripted.nix4
-rw-r--r--nixpkgs/nixos/modules/tasks/network-interfaces.nix8
-rw-r--r--nixpkgs/nixos/modules/testing/test-instrumentation.nix27
-rw-r--r--nixpkgs/nixos/modules/virtualisation/azure-image.nix2
-rw-r--r--nixpkgs/nixos/modules/virtualisation/containers.nix83
-rw-r--r--nixpkgs/nixos/modules/virtualisation/cri-o.nix25
-rw-r--r--nixpkgs/nixos/modules/virtualisation/docker-preloader.nix134
-rw-r--r--nixpkgs/nixos/modules/virtualisation/docker.nix1
-rw-r--r--nixpkgs/nixos/modules/virtualisation/libvirtd.nix4
-rw-r--r--nixpkgs/nixos/modules/virtualisation/nixos-containers.nix2
-rw-r--r--nixpkgs/nixos/modules/virtualisation/parallels-guest.nix2
-rw-r--r--nixpkgs/nixos/modules/virtualisation/podman.nix37
-rw-r--r--nixpkgs/nixos/modules/virtualisation/qemu-vm.nix155
-rw-r--r--nixpkgs/nixos/modules/virtualisation/railcar.nix16
-rw-r--r--nixpkgs/nixos/modules/virtualisation/spice-usb-redirection.nix24
-rw-r--r--nixpkgs/nixos/modules/virtualisation/virtualbox-guest.nix2
-rw-r--r--nixpkgs/nixos/modules/virtualisation/virtualbox-image.nix66
331 files changed, 11301 insertions, 4555 deletions
diff --git a/nixpkgs/nixos/modules/config/appstream.nix b/nixpkgs/nixos/modules/config/appstream.nix
index 483ac9c3cd76..a72215c2f561 100644
--- a/nixpkgs/nixos/modules/config/appstream.nix
+++ b/nixpkgs/nixos/modules/config/appstream.nix
@@ -7,18 +7,18 @@ with lib;
       type = types.bool;
       default = true;
       description = ''
-        Whether to install files to support the 
+        Whether to install files to support the
         <link xlink:href="https://www.freedesktop.org/software/appstream/docs/index.html">AppStream metadata specification</link>.
       '';
     };
   };
 
   config = mkIf config.appstream.enable {
-    environment.pathsToLink = [ 
+    environment.pathsToLink = [
       # per component metadata
-      "/share/metainfo" 
+      "/share/metainfo"
       # legacy path for above
-      "/share/appdata" 
+      "/share/appdata"
     ];
   };
 
diff --git a/nixpkgs/nixos/modules/config/fonts/fontconfig-penultimate.nix b/nixpkgs/nixos/modules/config/fonts/fontconfig-penultimate.nix
deleted file mode 100644
index 7e311a21acf6..000000000000
--- a/nixpkgs/nixos/modules/config/fonts/fontconfig-penultimate.nix
+++ /dev/null
@@ -1,292 +0,0 @@
-{ config, pkgs, lib, ... }:
-
-with lib;
-
-let
-  cfg = config.fonts.fontconfig;
-
-  fcBool = x: "<bool>" + (boolToString x) + "</bool>";
-
-  # back-supported fontconfig version and package
-  # version is used for font cache generation
-  supportVersion = "210";
-  supportPkg     = pkgs."fontconfig_${supportVersion}";
-
-  # latest fontconfig version and package
-  # version is used for configuration folder name, /etc/fonts/VERSION/
-  # note: format differs from supportVersion and can not be used with makeCacheConf
-  latestVersion  = pkgs.fontconfig.configVersion;
-  latestPkg      = pkgs.fontconfig;
-
-  # supported version fonts.conf
-  supportFontsConf = pkgs.makeFontsConf { fontconfig = supportPkg; fontDirectories = config.fonts.fonts; };
-
-  # configuration file to read fontconfig cache
-  # version dependent
-  # priority 0
-  cacheConfSupport = makeCacheConf { version = supportVersion; };
-  cacheConfLatest  = makeCacheConf {};
-
-  # generate the font cache setting file for a fontconfig version
-  # use latest when no version is passed
-  makeCacheConf = { version ? null }:
-    let
-      fcPackage = if version == null
-                  then "fontconfig"
-                  else "fontconfig_${version}";
-      makeCache = fontconfig: pkgs.makeFontsCache { inherit fontconfig; fontDirectories = config.fonts.fonts; };
-      cache     = makeCache pkgs.${fcPackage};
-      cache32   = makeCache pkgs.pkgsi686Linux.${fcPackage};
-    in
-    pkgs.writeText "fc-00-nixos-cache.conf" ''
-      <?xml version='1.0'?>
-      <!DOCTYPE fontconfig SYSTEM 'fonts.dtd'>
-      <fontconfig>
-        <!-- Font directories -->
-        ${concatStringsSep "\n" (map (font: "<dir>${font}</dir>") config.fonts.fonts)}
-        <!-- Pre-generated font caches -->
-        <cachedir>${cache}</cachedir>
-        ${optionalString (pkgs.stdenv.isx86_64 && cfg.cache32Bit) ''
-          <cachedir>${cache32}</cachedir>
-        ''}
-      </fontconfig>
-    '';
-
-  # local configuration file
-  localConf = pkgs.writeText "fc-local.conf" cfg.localConf;
-
-  # rendering settings configuration files
-  # priority 10
-  hintingConf = pkgs.writeText "fc-10-hinting.conf" ''
-    <?xml version='1.0'?>
-    <!DOCTYPE fontconfig SYSTEM 'fonts.dtd'>
-    <fontconfig>
-
-      <!-- Default rendering settings -->
-      <match target="pattern">
-        <edit mode="append" name="hinting">
-          ${fcBool cfg.hinting.enable}
-        </edit>
-        <edit mode="append" name="autohint">
-          ${fcBool cfg.hinting.autohint}
-        </edit>
-        <edit mode="append" name="hintstyle">
-          <const>hintslight</const>
-        </edit>
-      </match>
-
-    </fontconfig>
-  '';
-
-  antialiasConf = pkgs.writeText "fc-10-antialias.conf" ''
-    <?xml version='1.0'?>
-    <!DOCTYPE fontconfig SYSTEM 'fonts.dtd'>
-    <fontconfig>
-
-      <!-- Default rendering settings -->
-      <match target="pattern">
-        <edit mode="append" name="antialias">
-          ${fcBool cfg.antialias}
-        </edit>
-      </match>
-
-    </fontconfig>
-  '';
-
-  subpixelConf = pkgs.writeText "fc-10-subpixel.conf" ''
-    <?xml version='1.0'?>
-    <!DOCTYPE fontconfig SYSTEM 'fonts.dtd'>
-    <fontconfig>
-
-      <!-- Default rendering settings -->
-      <match target="pattern">
-        <edit mode="append" name="rgba">
-          <const>${cfg.subpixel.rgba}</const>
-        </edit>
-        <edit mode="append" name="lcdfilter">
-          <const>lcd${cfg.subpixel.lcdfilter}</const>
-        </edit>
-      </match>
-
-    </fontconfig>
-  '';
-
-  dpiConf = pkgs.writeText "fc-11-dpi.conf" ''
-    <?xml version='1.0'?>
-    <!DOCTYPE fontconfig SYSTEM 'fonts.dtd'>
-    <fontconfig>
-
-      <match target="pattern">
-        <edit name="dpi" mode="assign">
-          <double>${toString cfg.dpi}</double>
-        </edit>
-      </match>
-
-    </fontconfig>
-  '';
-
-  # default fonts configuration file
-  # priority 52
-  defaultFontsConf =
-    let genDefault = fonts: name:
-      optionalString (fonts != []) ''
-        <alias>
-          <family>${name}</family>
-          <prefer>
-          ${concatStringsSep ""
-          (map (font: ''
-            <family>${font}</family>
-          '') fonts)}
-          </prefer>
-        </alias>
-      '';
-    in
-    pkgs.writeText "fc-52-nixos-default-fonts.conf" ''
-    <?xml version='1.0'?>
-    <!DOCTYPE fontconfig SYSTEM 'fonts.dtd'>
-    <fontconfig>
-
-      <!-- Default fonts -->
-      ${genDefault cfg.defaultFonts.sansSerif "sans-serif"}
-
-      ${genDefault cfg.defaultFonts.serif     "serif"}
-
-      ${genDefault cfg.defaultFonts.monospace "monospace"}
-
-    </fontconfig>
-  '';
-
-  # reject Type 1 fonts
-  # priority 53
-  rejectType1 = pkgs.writeText "fc-53-nixos-reject-type1.conf" ''
-    <?xml version="1.0"?>
-    <!DOCTYPE fontconfig SYSTEM "fonts.dtd">
-    <fontconfig>
-
-    <!-- Reject Type 1 fonts -->
-    <selectfont>
-      <rejectfont>
-        <pattern>
-          <patelt name="fontformat"><string>Type 1</string></patelt>
-        </pattern>
-      </rejectfont>
-    </selectfont>
-
-    </fontconfig>
-  '';
-
-  # The configuration to be included in /etc/font/
-  penultimateConf = pkgs.runCommand "fontconfig-penultimate-conf" {
-    preferLocalBuild = true;
-  } ''
-    support_folder=$out/etc/fonts/conf.d
-    latest_folder=$out/etc/fonts/${latestVersion}/conf.d
-
-    mkdir -p $support_folder
-    mkdir -p $latest_folder
-
-    # fonts.conf
-    ln -s ${supportFontsConf} $support_folder/../fonts.conf
-    ln -s ${latestPkg.out}/etc/fonts/fonts.conf \
-          $latest_folder/../fonts.conf
-
-    # fontconfig-penultimate various configuration files
-    ln -s ${pkgs.fontconfig-penultimate}/etc/fonts/conf.d/*.conf \
-          $support_folder
-    ln -s ${pkgs.fontconfig-penultimate}/etc/fonts/conf.d/*.conf \
-          $latest_folder
-
-    ln -s ${cacheConfSupport} $support_folder/00-nixos-cache.conf
-    ln -s ${cacheConfLatest}  $latest_folder/00-nixos-cache.conf
-
-    rm $support_folder/10-antialias.conf $latest_folder/10-antialias.conf
-    ln -s ${antialiasConf} $support_folder/10-antialias.conf
-    ln -s ${antialiasConf} $latest_folder/10-antialias.conf
-
-    rm $support_folder/10-hinting.conf $latest_folder/10-hinting.conf
-    ln -s ${hintingConf} $support_folder/10-hinting.conf
-    ln -s ${hintingConf} $latest_folder/10-hinting.conf
-
-    ${optionalString cfg.useEmbeddedBitmaps ''
-    rm $support_folder/10-no-embedded-bitmaps.conf
-    rm $latest_folder/10-no-embedded-bitmaps.conf
-    ''}
-
-    rm $support_folder/10-subpixel.conf $latest_folder/10-subpixel.conf
-    ln -s ${subpixelConf} $support_folder/10-subpixel.conf
-    ln -s ${subpixelConf} $latest_folder/10-subpixel.conf
-
-    ${optionalString (cfg.dpi != 0) ''
-    ln -s ${dpiConf} $support_folder/11-dpi.conf
-    ln -s ${dpiConf} $latest_folder/11-dpi.conf
-    ''}
-
-    # 50-user.conf
-    ${optionalString (!cfg.includeUserConf) ''
-    rm $support_folder/50-user.conf
-    rm $latest_folder/50-user.conf
-    ''}
-
-    # 51-local.conf
-    rm $latest_folder/51-local.conf
-    substitute \
-      ${pkgs.fontconfig-penultimate}/etc/fonts/conf.d/51-local.conf \
-      $latest_folder/51-local.conf \
-      --replace local.conf /etc/fonts/${latestVersion}/local.conf
-
-    # local.conf (indirect priority 51)
-    ${optionalString (cfg.localConf != "") ''
-    ln -s ${localConf}        $support_folder/../local.conf
-    ln -s ${localConf}        $latest_folder/../local.conf
-    ''}
-
-    # 52-nixos-default-fonts.conf
-    ln -s ${defaultFontsConf} $support_folder/52-nixos-default-fonts.conf
-    ln -s ${defaultFontsConf} $latest_folder/52-nixos-default-fonts.conf
-
-    # 53-no-bitmaps.conf
-    ${optionalString cfg.allowBitmaps ''
-    rm $support_folder/53-no-bitmaps.conf
-    rm $latest_folder/53-no-bitmaps.conf
-    ''}
-
-    ${optionalString (!cfg.allowType1) ''
-    # 53-nixos-reject-type1.conf
-    ln -s ${rejectType1} $support_folder/53-nixos-reject-type1.conf
-    ln -s ${rejectType1} $latest_folder/53-nixos-reject-type1.conf
-    ''}
-  '';
-
-in
-{
-
-  options = {
-
-    fonts = {
-
-      fontconfig = {
-
-        penultimate = {
-          enable = mkOption {
-            type = types.bool;
-            default = false;
-            description = ''
-              Enable fontconfig-penultimate settings to supplement the
-              NixOS defaults by providing per-font rendering defaults and
-              metric aliases.
-            '';
-          };
-        };
-
-      };
-    };
-
-  };
-
-  config = mkIf (config.fonts.fontconfig.enable && config.fonts.fontconfig.penultimate.enable) {
-
-    fonts.fontconfig.confPackages = [ penultimateConf ];
-
-  };
-
-}
diff --git a/nixpkgs/nixos/modules/config/fonts/fontconfig.nix b/nixpkgs/nixos/modules/config/fonts/fontconfig.nix
index 6ac64b0ec9c6..5b681ca59464 100644
--- a/nixpkgs/nixos/modules/config/fonts/fontconfig.nix
+++ b/nixpkgs/nixos/modules/config/fonts/fontconfig.nix
@@ -1,11 +1,6 @@
 /*
 
-NixOS support 2 fontconfig versions, "support" and "latest".
-
-- "latest" refers to default fontconfig package (pkgs.fontconfig).
-  configuration files are linked to /etc/fonts/VERSION/conf.d/
-- "support" refers to supportPkg (pkgs."fontconfig_${supportVersion}").
-  configuration files are linked to /etc/fonts/conf.d/
+Configuration files are linked to /etc/fonts/conf.d/
 
 This module generates a package containing configuration files and link it in /etc/fonts.
 
@@ -22,44 +17,25 @@ let
   cfg = config.fonts.fontconfig;
 
   fcBool = x: "<bool>" + (boolToString x) + "</bool>";
-
-  # back-supported fontconfig version and package
-  # version is used for font cache generation
-  supportVersion = "210";
-  supportPkg     = pkgs."fontconfig_${supportVersion}";
-
-  # latest fontconfig version and package
-  # version is used for configuration folder name, /etc/fonts/VERSION/
-  # note: format differs from supportVersion and can not be used with makeCacheConf
-  latestVersion  = pkgs.fontconfig.configVersion;
-  latestPkg      = pkgs.fontconfig;
-
-  # supported version fonts.conf
-  supportFontsConf = pkgs.makeFontsConf { fontconfig = supportPkg; fontDirectories = config.fonts.fonts; };
+  pkg = pkgs.fontconfig;
 
   # configuration file to read fontconfig cache
-  # version dependent
   # priority 0
-  cacheConfSupport = makeCacheConf { version = supportVersion; };
-  cacheConfLatest  = makeCacheConf {};
+  cacheConf  = makeCacheConf {};
 
-  # generate the font cache setting file for a fontconfig version
-  # use latest when no version is passed
+  # generate the font cache setting file
   # When cross-compiling, we can’t generate the cache, so we skip the
   # <cachedir> part. fontconfig still works but is a little slower in
   # looking things up.
-  makeCacheConf = { version ? null }:
+  makeCacheConf = { }:
     let
-      fcPackage = if version == null
-                  then "fontconfig"
-                  else "fontconfig_${version}";
       makeCache = fontconfig: pkgs.makeFontsCache { inherit fontconfig; fontDirectories = config.fonts.fonts; };
-      cache     = makeCache pkgs.${fcPackage};
-      cache32   = makeCache pkgs.pkgsi686Linux.${fcPackage};
+      cache     = makeCache pkgs.fontconfig;
+      cache32   = makeCache pkgs.pkgsi686Linux.fontconfig;
     in
     pkgs.writeText "fc-00-nixos-cache.conf" ''
       <?xml version='1.0'?>
-      <!DOCTYPE fontconfig SYSTEM 'fonts.dtd'>
+      <!DOCTYPE fontconfig SYSTEM 'urn:fontconfig:fonts.dtd'>
       <fontconfig>
         <!-- Font directories -->
         ${concatStringsSep "\n" (map (font: "<dir>${font}</dir>") config.fonts.fonts)}
@@ -77,7 +53,7 @@ let
   # priority 10
   renderConf = pkgs.writeText "fc-10-nixos-rendering.conf" ''
     <?xml version='1.0'?>
-    <!DOCTYPE fontconfig SYSTEM 'fonts.dtd'>
+    <!DOCTYPE fontconfig SYSTEM 'urn:fontconfig:fonts.dtd'>
     <fontconfig>
 
       <!-- Default rendering settings -->
@@ -134,7 +110,7 @@ let
     in
     pkgs.writeText "fc-52-nixos-default-fonts.conf" ''
     <?xml version='1.0'?>
-    <!DOCTYPE fontconfig SYSTEM 'fonts.dtd'>
+    <!DOCTYPE fontconfig SYSTEM 'urn:fontconfig:fonts.dtd'>
     <fontconfig>
 
       <!-- Default fonts -->
@@ -153,7 +129,7 @@ let
   # priority 53
   rejectBitmaps = pkgs.writeText "fc-53-no-bitmaps.conf" ''
     <?xml version="1.0"?>
-    <!DOCTYPE fontconfig SYSTEM "fonts.dtd">
+    <!DOCTYPE fontconfig SYSTEM "urn:fontconfig:fonts.dtd">
     <fontconfig>
 
     ${optionalString (!cfg.allowBitmaps) ''
@@ -181,7 +157,7 @@ let
   # priority 53
   rejectType1 = pkgs.writeText "fc-53-nixos-reject-type1.conf" ''
     <?xml version="1.0"?>
-    <!DOCTYPE fontconfig SYSTEM "fonts.dtd">
+    <!DOCTYPE fontconfig SYSTEM "urn:fontconfig:fonts.dtd">
     <fontconfig>
 
     <!-- Reject Type 1 fonts -->
@@ -200,63 +176,46 @@ let
   confPkg = pkgs.runCommand "fontconfig-conf" {
     preferLocalBuild = true;
   } ''
-    support_folder=$out/etc/fonts/conf.d
-    latest_folder=$out/etc/fonts/${latestVersion}/conf.d
-
-    mkdir -p $support_folder
-    mkdir -p $latest_folder
+    dst=$out/etc/fonts/conf.d
+    mkdir -p $dst
 
     # fonts.conf
-    ln -s ${supportFontsConf} $support_folder/../fonts.conf
-    ln -s ${latestPkg.out}/etc/fonts/fonts.conf \
-          $latest_folder/../fonts.conf
+    ln -s ${pkg.out}/etc/fonts/fonts.conf \
+          $dst/../fonts.conf
+    # TODO: remove this legacy symlink once people stop using packages built before #95358 was merged
+    mkdir -p $out/etc/fonts/2.11
+    ln -s /etc/fonts/fonts.conf \
+          $out/etc/fonts/2.11/fonts.conf
 
     # fontconfig default config files
-    ln -s ${supportPkg.out}/etc/fonts/conf.d/*.conf \
-          $support_folder/
-    ln -s ${latestPkg.out}/etc/fonts/conf.d/*.conf \
-          $latest_folder/
-
-    # update latest 51-local.conf path to look at the latest local.conf
-    rm    $latest_folder/51-local.conf
-
-    substitute ${latestPkg.out}/etc/fonts/conf.d/51-local.conf \
-               $latest_folder/51-local.conf \
-               --replace local.conf /etc/fonts/${latestVersion}/local.conf
+    ln -s ${pkg.out}/etc/fonts/conf.d/*.conf \
+          $dst/
 
     # 00-nixos-cache.conf
-    ln -s ${cacheConfSupport} \
-          $support_folder/00-nixos-cache.conf
-    ln -s ${cacheConfLatest}  $latest_folder/00-nixos-cache.conf
+    ln -s ${cacheConf}  $dst/00-nixos-cache.conf
 
     # 10-nixos-rendering.conf
-    ln -s ${renderConf}       $support_folder/10-nixos-rendering.conf
-    ln -s ${renderConf}       $latest_folder/10-nixos-rendering.conf
+    ln -s ${renderConf}       $dst/10-nixos-rendering.conf
 
     # 50-user.conf
     ${optionalString (!cfg.includeUserConf) ''
-    rm $support_folder/50-user.conf
-    rm $latest_folder/50-user.conf
+    rm $dst/50-user.conf
     ''}
 
     # local.conf (indirect priority 51)
     ${optionalString (cfg.localConf != "") ''
-    ln -s ${localConf}        $support_folder/../local.conf
-    ln -s ${localConf}        $latest_folder/../local.conf
+    ln -s ${localConf}        $dst/../local.conf
     ''}
 
     # 52-nixos-default-fonts.conf
-    ln -s ${defaultFontsConf} $support_folder/52-nixos-default-fonts.conf
-    ln -s ${defaultFontsConf} $latest_folder/52-nixos-default-fonts.conf
+    ln -s ${defaultFontsConf} $dst/52-nixos-default-fonts.conf
 
     # 53-no-bitmaps.conf
-    ln -s ${rejectBitmaps} $support_folder/53-no-bitmaps.conf
-    ln -s ${rejectBitmaps} $latest_folder/53-no-bitmaps.conf
+    ln -s ${rejectBitmaps} $dst/53-no-bitmaps.conf
 
     ${optionalString (!cfg.allowType1) ''
     # 53-nixos-reject-type1.conf
-    ln -s ${rejectType1} $support_folder/53-nixos-reject-type1.conf
-    ln -s ${rejectType1} $latest_folder/53-nixos-reject-type1.conf
+    ln -s ${rejectType1} $dst/53-nixos-reject-type1.conf
     ''}
   '';
 
@@ -278,7 +237,14 @@ in
     (mkRemovedOptionModule [ "fonts" "fontconfig" "hinting" "style" ] "")
     (mkRemovedOptionModule [ "fonts" "fontconfig" "forceAutohint" ] "")
     (mkRemovedOptionModule [ "fonts" "fontconfig" "renderMonoTTFAsBitmap" ] "")
-  ];
+  ] ++ lib.forEach [ "enable" "substitutions" "preset" ]
+     (opt: lib.mkRemovedOptionModule [ "fonts" "fontconfig" "ultimate" "${opt}" ] ''
+       The fonts.fontconfig.ultimate module and configuration is obsolete.
+       The repository has since been archived and activity has ceased.
+       https://github.com/bohoomil/fontconfig-ultimate/issues/171.
+       No action should be needed for font configuration, as the fonts.fontconfig
+       module is already used by default.
+     '');
 
   options = {
 
@@ -483,7 +449,7 @@ in
       environment.systemPackages    = [ pkgs.fontconfig ];
       environment.etc.fonts.source  = "${fontconfigEtc}/etc/fonts/";
     })
-    (mkIf (cfg.enable && !cfg.penultimate.enable) {
+    (mkIf cfg.enable {
       fonts.fontconfig.confPackages = [ confPkg ];
     })
   ];
diff --git a/nixpkgs/nixos/modules/config/krb5/default.nix b/nixpkgs/nixos/modules/config/krb5/default.nix
index ff16ffcf9c65..c2302451d702 100644
--- a/nixpkgs/nixos/modules/config/krb5/default.nix
+++ b/nixpkgs/nixos/modules/config/krb5/default.nix
@@ -41,31 +41,30 @@ let
         value)
     else value;
 
-  mkIndent = depth: concatStrings (builtins.genList (_:  " ") (2 * depth));
+  indent = "  ";
 
-  mkRelation = name: value: "${name} = ${mkVal { inherit value; }}";
+  mkRelation = name: value:
+    if (isList value) then
+      concatMapStringsSep "\n" (mkRelation name) value
+    else "${name} = ${mkVal value}";
 
-  mkVal = { value, depth ? 0 }:
+  mkVal = value:
     if (value == true) then "true"
     else if (value == false) then "false"
     else if (isInt value) then (toString value)
-    else if (isList value) then
-      concatMapStringsSep " " mkVal { inherit value depth; }
     else if (isAttrs value) then
-      (concatStringsSep "\n${mkIndent (depth + 1)}"
-        ([ "{" ] ++ (mapAttrsToList
-          (attrName: attrValue: let
-            mappedAttrValue = mkVal {
-              value = attrValue;
-              depth = depth + 1;
-            };
-          in "${attrName} = ${mappedAttrValue}")
-        value))) + "\n${mkIndent depth}}"
+      let configLines = concatLists
+        (map (splitString "\n")
+          (mapAttrsToList mkRelation value));
+      in
+      (concatStringsSep "\n${indent}"
+        ([ "{" ] ++ configLines))
+      + "\n}"
     else value;
 
   mkMappedAttrsOrString = value: concatMapStringsSep "\n"
     (line: if builtins.stringLength line > 0
-      then "${mkIndent 1}${line}"
+      then "${indent}${line}"
       else line)
     (splitString "\n"
       (if isAttrs value then
@@ -114,7 +113,10 @@ in {
           {
             "ATHENA.MIT.EDU" = {
               admin_server = "athena.mit.edu";
-              kdc = "athena.mit.edu";
+              kdc = [
+                "athena01.mit.edu"
+                "athena02.mit.edu"
+              ];
             };
           };
         '';
diff --git a/nixpkgs/nixos/modules/config/no-x-libs.nix b/nixpkgs/nixos/modules/config/no-x-libs.nix
index 873b8073fed9..941ab78f8632 100644
--- a/nixpkgs/nixos/modules/config/no-x-libs.nix
+++ b/nixpkgs/nixos/modules/config/no-x-libs.nix
@@ -27,6 +27,7 @@ with lib;
     fonts.fontconfig.enable = false;
 
     nixpkgs.overlays = singleton (const (super: {
+      cairo = super.cairo.override { x11Support = false; };
       dbus = super.dbus.override { x11Support = false; };
       networkmanager-fortisslvpn = super.networkmanager-fortisslvpn.override { withGnome = false; };
       networkmanager-l2tp = super.networkmanager-l2tp.override { withGnome = false; };
@@ -35,6 +36,7 @@ with lib;
       networkmanager-vpnc = super.networkmanager-vpnc.override { withGnome = false; };
       networkmanager-iodine = super.networkmanager-iodine.override { withGnome = false; };
       gobject-introspection = super.gobject-introspection.override { x11Support = false; };
+      qemu = super.qemu.override { gtkSupport = false; spiceSupport = false; sdlSupport = false; };
     }));
   };
 }
diff --git a/nixpkgs/nixos/modules/config/system-path.nix b/nixpkgs/nixos/modules/config/system-path.nix
index ae9710e3518b..67305e8499cb 100644
--- a/nixpkgs/nixos/modules/config/system-path.nix
+++ b/nixpkgs/nixos/modules/config/system-path.nix
@@ -33,17 +33,20 @@ let
       pkgs.ncurses
       pkgs.netcat
       config.programs.ssh.package
-      pkgs.perl
       pkgs.procps
-      pkgs.rsync
-      pkgs.strace
       pkgs.su
       pkgs.time
       pkgs.utillinux
-      pkgs.which # 88K size
+      pkgs.which
       pkgs.zstd
     ];
 
+    defaultPackages = map (pkg: setPrio ((pkg.meta.priority or 5) + 3) pkg)
+      [ pkgs.perl
+        pkgs.rsync
+        pkgs.strace
+      ];
+
 in
 
 {
@@ -66,6 +69,21 @@ in
         '';
       };
 
+      defaultPackages = mkOption {
+        type = types.listOf types.package;
+        default = defaultPackages;
+        example = literalExample "[]";
+        description = ''
+          Set of packages users expect from a minimal linux istall.
+          Like systemPackages, they appear in
+          /run/current-system/sw.  These packages are
+          automatically available to all users, and are
+          automatically updated every time you rebuild the system
+          configuration.
+          If you want a more minimal system, set it to an empty list.
+        '';
+      };
+
       pathsToLink = mkOption {
         type = types.listOf types.str;
         # Note: We need `/lib' to be among `pathsToLink' for NSS modules
@@ -105,7 +123,7 @@ in
 
   config = {
 
-    environment.systemPackages = requiredPackages;
+    environment.systemPackages = requiredPackages ++ config.environment.defaultPackages;
 
     environment.pathsToLink =
       [ "/bin"
diff --git a/nixpkgs/nixos/modules/config/update-users-groups.pl b/nixpkgs/nixos/modules/config/update-users-groups.pl
index e97d46ccf7f7..42f82e431954 100644
--- a/nixpkgs/nixos/modules/config/update-users-groups.pl
+++ b/nixpkgs/nixos/modules/config/update-users-groups.pl
@@ -283,3 +283,64 @@ foreach my $u (values %usersOut) {
 }
 
 updateFile("/etc/shadow", \@shadowNew, 0600);
+{
+    my $uid = getpwnam "root";
+    my $gid = getgrnam "shadow";
+    my $path = "/etc/shadow";
+    chown($uid, $gid, $path) || die "Failed to change ownership of $path: $!";
+}
+
+# Rewrite /etc/subuid & /etc/subgid to include default container mappings
+
+my $subUidMapFile = "/var/lib/nixos/auto-subuid-map";
+my $subUidMap = -e $subUidMapFile ? decode_json(read_file($subUidMapFile)) : {};
+
+my (%subUidsUsed, %subUidsPrevUsed);
+
+$subUidsPrevUsed{$_} = 1 foreach values %{$subUidMap};
+
+sub allocSubUid {
+    my ($name, @rest) = @_;
+
+    # TODO: No upper bounds?
+    my ($min, $max, $up) = (100000, 100000 * 100, 1);
+    my $prevId = $subUidMap->{$name};
+    if (defined $prevId && !defined $subUidsUsed{$prevId}) {
+        $subUidsUsed{$prevId} = 1;
+        return $prevId;
+    }
+
+    my $id = allocId(\%subUidsUsed, \%subUidsPrevUsed, $min, $max, $up, sub { my ($uid) = @_; getpwuid($uid) });
+    my $offset = $id - 100000;
+    my $count = $offset * 65536;
+    my $subordinate = 100000 + $count;
+    return $subordinate;
+}
+
+my @subGids;
+my @subUids;
+foreach my $u (values %usersOut) {
+    my $name = $u->{name};
+
+    foreach my $range (@{$u->{subUidRanges}}) {
+        my $value = join(":", ($name, $range->{startUid}, $range->{count}));
+        push @subUids, $value;
+    }
+
+    foreach my $range (@{$u->{subGidRanges}}) {
+        my $value = join(":", ($name, $range->{startGid}, $range->{count}));
+        push @subGids, $value;
+    }
+
+    if($u->{isNormalUser}) {
+        my $subordinate = allocSubUid($name);
+        $subUidMap->{$name} = $subordinate;
+        my $value = join(":", ($name, $subordinate, 65536));
+        push @subUids, $value;
+        push @subGids, $value;
+    }
+}
+
+updateFile("/etc/subuid", join("\n", @subUids) . "\n");
+updateFile("/etc/subgid", join("\n", @subGids) . "\n");
+updateFile($subUidMapFile, encode_json($subUidMap) . "\n");
diff --git a/nixpkgs/nixos/modules/config/users-groups.nix b/nixpkgs/nixos/modules/config/users-groups.nix
index e0a77b08b7e9..1bb1317a8e85 100644
--- a/nixpkgs/nixos/modules/config/users-groups.nix
+++ b/nixpkgs/nixos/modules/config/users-groups.nix
@@ -35,8 +35,19 @@ let
   '';
 
   hashedPasswordDescription = ''
-    To generate hashed password install <literal>mkpasswd</literal>
+    To generate a hashed password install the <literal>mkpasswd</literal>
     package and run <literal>mkpasswd -m sha-512</literal>.
+
+    If set to an empty string (<literal>""</literal>), this user will
+    be able to log in without being asked for a password (but not via remote
+    services such as SSH, or indirectly via <command>su</command> or
+    <command>sudo</command>). This should only be used for e.g. bootable
+    live systems. Note: this is different from setting an empty password,
+    which ca be achieved using <option>users.users.&lt;name?&gt;.password</option>.
+
+    If set to <literal>null</literal> (default) this user will not
+    be able to log in using a password (i.e. via <command>login</command>
+    command).
   '';
 
   userOpts = { name, config, ... }: {
@@ -364,18 +375,6 @@ let
     };
   };
 
-  mkSubuidEntry = user: concatStrings (
-    map (range: "${user.name}:${toString range.startUid}:${toString range.count}\n")
-      user.subUidRanges);
-
-  subuidFile = concatStrings (map mkSubuidEntry (attrValues cfg.users));
-
-  mkSubgidEntry = user: concatStrings (
-    map (range: "${user.name}:${toString range.startGid}:${toString range.count}\n")
-        user.subGidRanges);
-
-  subgidFile = concatStrings (map mkSubgidEntry (attrValues cfg.users));
-
   idsAreUnique = set: idAttr: !(fold (name: args@{ dup, acc }:
     let
       id = builtins.toString (builtins.getAttr idAttr (builtins.getAttr name set));
@@ -395,6 +394,7 @@ let
       { inherit (u)
           name uid group description home createHome isSystemUser
           password passwordFile hashedPassword
+          isNormalUser subUidRanges subGidRanges
           initialPassword initialHashedPassword;
         shell = utils.toShellPath u.shell;
       }) cfg.users;
@@ -419,9 +419,9 @@ in {
     (mkChangedOptionModule
       [ "security" "initialRootPassword" ]
       [ "users" "users" "root" "initialHashedPassword" ]
-      (cfg: if cfg.security.initialHashedPassword == "!"
+      (cfg: if cfg.security.initialRootPassword == "!"
             then null
-            else cfg.security.initialHashedPassword))
+            else cfg.security.initialRootPassword))
   ];
 
   ###### interface
@@ -463,7 +463,7 @@ in {
 
     users.users = mkOption {
       default = {};
-      type = with types; loaOf (submodule userOpts);
+      type = with types; attrsOf (submodule userOpts);
       example = {
         alice = {
           uid = 1234;
@@ -487,7 +487,7 @@ in {
         { students.gid = 1001;
           hackers = { };
         };
-      type = with types; loaOf (submodule groupOpts);
+      type = with types; attrsOf (submodule groupOpts);
       description = ''
         Additional groups to be created automatically by the system.
       '';
@@ -537,6 +537,7 @@ in {
       input.gid = ids.gids.input;
       kvm.gid = ids.gids.kvm;
       render.gid = ids.gids.render;
+      shadow.gid = ids.gids.shadow;
     };
 
     system.activationScripts.users = stringAfter [ "stdio" ]
@@ -556,16 +557,7 @@ in {
     # Install all the user shells
     environment.systemPackages = systemShells;
 
-    environment.etc = {
-      subuid = {
-        text = subuidFile;
-        mode = "0644";
-      };
-      subgid = {
-        text = subgidFile;
-        mode = "0644";
-      };
-    } // (mapAttrs' (name: { packages, ... }: {
+    environment.etc = (mapAttrs' (name: { packages, ... }: {
       name = "profiles/per-user/${name}";
       value.source = pkgs.buildEnv {
         name = "user-environment";
@@ -590,7 +582,7 @@ in {
         # password or an SSH authorized key. Privileged accounts are
         # root and users in the wheel group.
         assertion = !cfg.mutableUsers ->
-          any id (mapAttrsToList (name: cfg:
+          any id ((mapAttrsToList (name: cfg:
             (name == "root"
              || cfg.group == "wheel"
              || elem "wheel" cfg.extraGroups)
@@ -600,12 +592,24 @@ in {
              || cfg.passwordFile != null
              || cfg.openssh.authorizedKeys.keys != []
              || cfg.openssh.authorizedKeys.keyFiles != [])
-          ) cfg.users);
+          ) cfg.users) ++ [
+            config.security.googleOsLogin.enable
+          ]);
         message = ''
           Neither the root account nor any wheel user has a password or SSH authorized key.
           You must set one to prevent being locked out of your system.'';
       }
-    ];
+    ] ++ flip mapAttrsToList cfg.users (name: user:
+      {
+        assertion = (user.hashedPassword != null)
+                    -> (builtins.match ".*:.*" user.hashedPassword == null);
+        message = ''
+          The password hash of user "${name}" contains a ":" character.
+          This is invalid and would break the login system because the fields
+          of /etc/shadow (file where hashes are stored) are colon-separated.
+          Please check the value of option `users.users."${name}".hashedPassword`.'';
+      }
+    );
 
     warnings =
       builtins.filter (x: x != null) (
diff --git a/nixpkgs/nixos/modules/hardware/bladeRF.nix b/nixpkgs/nixos/modules/hardware/bladeRF.nix
index 925443477143..35b74b8382e3 100644
--- a/nixpkgs/nixos/modules/hardware/bladeRF.nix
+++ b/nixpkgs/nixos/modules/hardware/bladeRF.nix
@@ -25,4 +25,4 @@ in
     services.udev.packages = [ pkgs.libbladeRF ];
     users.groups.bladerf = {};
   };
-}
\ No newline at end of file
+}
diff --git a/nixpkgs/nixos/modules/hardware/ckb-next.nix b/nixpkgs/nixos/modules/hardware/ckb-next.nix
index fe0ca9f26d54..6932be1c54ca 100644
--- a/nixpkgs/nixos/modules/hardware/ckb-next.nix
+++ b/nixpkgs/nixos/modules/hardware/ckb-next.nix
@@ -43,7 +43,6 @@ in
         serviceConfig = {
           ExecStart = "${cfg.package}/bin/ckb-next-daemon ${optionalString (cfg.gid != null) "--gid=${builtins.toString cfg.gid}"}";
           Restart = "on-failure";
-          StandardOutput = "syslog";
         };
       };
     };
diff --git a/nixpkgs/nixos/modules/hardware/device-tree.nix b/nixpkgs/nixos/modules/hardware/device-tree.nix
index cf553497c89b..e0ab37bca63a 100644
--- a/nixpkgs/nixos/modules/hardware/device-tree.nix
+++ b/nixpkgs/nixos/modules/hardware/device-tree.nix
@@ -4,7 +4,114 @@ with lib;
 
 let
   cfg = config.hardware.deviceTree;
-in {
+
+  overlayType = types.submodule {
+    options = {
+      name = mkOption {
+        type = types.str;
+        description = ''
+          Name of this overlay
+        '';
+      };
+
+      dtsFile = mkOption {
+        type = types.nullOr types.path;
+        description = ''
+          Path to .dts overlay file, overlay is applied to
+          each .dtb file matching "compatible" of the overlay.
+        '';
+        default = null;
+        example = literalExample "./dts/overlays.dts";
+      };
+
+      dtsText = mkOption {
+        type = types.nullOr types.str;
+        default = null;
+        description = ''
+          Literal DTS contents, overlay is applied to
+          each .dtb file matching "compatible" of the overlay.
+        '';
+        example = literalExample ''
+          /dts-v1/;
+          /plugin/;
+          / {
+                  compatible = "raspberrypi";
+                  fragment@0 {
+                          target-path = "/soc";
+                          __overlay__ {
+                                  pps {
+                                          compatible = "pps-gpio";
+                                          status = "okay";
+                                  };
+                          };
+                  };
+          };
+        '';
+      };
+
+      dtboFile = mkOption {
+        type = types.nullOr types.path;
+        default = null;
+        description = ''
+          Path to .dtbo compiled overlay file.
+        '';
+      };
+    };
+  };
+
+  # this requires kernel package
+  dtbsWithSymbols = pkgs.stdenv.mkDerivation {
+    name = "dtbs-with-symbols";
+    inherit (cfg.kernelPackage) src nativeBuildInputs depsBuildBuild;
+    patches = map (patch: patch.patch) cfg.kernelPackage.kernelPatches;
+    buildPhase = ''
+      patchShebangs scripts/*
+      substituteInPlace scripts/Makefile.lib \
+        --replace 'DTC_FLAGS += $(DTC_FLAGS_$(basetarget))' 'DTC_FLAGS += $(DTC_FLAGS_$(basetarget)) -@'
+      make ${pkgs.stdenv.hostPlatform.platform.kernelBaseConfig} ARCH="${pkgs.stdenv.hostPlatform.platform.kernelArch}"
+      make dtbs ARCH="${pkgs.stdenv.hostPlatform.platform.kernelArch}"
+    '';
+    installPhase = ''
+      make dtbs_install INSTALL_DTBS_PATH=$out/dtbs  ARCH="${pkgs.stdenv.hostPlatform.platform.kernelArch}"
+    '';
+  };
+
+  filterDTBs = src: if isNull cfg.filter
+    then "${src}/dtbs"
+    else
+      pkgs.runCommand "dtbs-filtered" {} ''
+        mkdir -p $out
+        cd ${src}/dtbs
+        find . -type f -name '${cfg.filter}' -print0 \
+          | xargs -0 cp -v --no-preserve=mode --target-directory $out --parents
+      '';
+
+  # Compile single Device Tree overlay source
+  # file (.dts) into its compiled variant (.dtbo)
+  compileDTS = name: f: pkgs.callPackage({ dtc }: pkgs.stdenv.mkDerivation {
+    name = "${name}-dtbo";
+
+    nativeBuildInputs = [ dtc ];
+
+    buildCommand = ''
+      dtc -I dts ${f} -O dtb -@ -o $out
+    '';
+  }) {};
+
+  # Fill in `dtboFile` for each overlay if not set already.
+  # Existence of one of these is guarded by assertion below
+  withDTBOs = xs: flip map xs (o: o // { dtboFile =
+    if isNull o.dtboFile then
+      if !isNull o.dtsFile then compileDTS o.name o.dtsFile
+      else compileDTS o.name (pkgs.writeText "dts" o.dtsText)
+    else o.dtboFile; } );
+
+in
+{
+  imports = [
+    (mkRemovedOptionModule [ "hardware" "deviceTree" "base" ] "Use hardware.deviceTree.kernelPackage instead")
+  ];
+
   options = {
       hardware.deviceTree = {
         enable = mkOption {
@@ -16,25 +123,54 @@ in {
           '';
         };
 
-        base = mkOption {
-          default = "${config.boot.kernelPackages.kernel}/dtbs";
-          defaultText = "\${config.boot.kernelPackages.kernel}/dtbs";
-          example = literalExample "pkgs.device-tree_rpi";
+        kernelPackage = mkOption {
+          default = config.boot.kernelPackages.kernel;
+          defaultText = "config.boot.kernelPackages.kernel";
+          example = literalExample "pkgs.linux_latest";
           type = types.path;
           description = ''
-            The package containing the base device-tree (.dtb) to boot. Contains
+            Kernel package containing the base device-tree (.dtb) to boot. Uses
             device trees bundled with the Linux kernel by default.
           '';
         };
 
+        name = mkOption {
+          default = null;
+          example = "some-dtb.dtb";
+          type = types.nullOr types.str;
+          description = ''
+            The name of an explicit dtb to be loaded, relative to the dtb base.
+            Useful in extlinux scenarios if the bootloader doesn't pick the
+            right .dtb file from FDTDIR.
+          '';
+        };
+
+        filter = mkOption {
+          type = types.nullOr types.str;
+          default = null;
+          example = "*rpi*.dtb";
+          description = ''
+            Only include .dtb files matching glob expression.
+          '';
+        };
+
         overlays = mkOption {
           default = [];
-          example = literalExample
-            "[\"\${pkgs.device-tree_rpi.overlays}/w1-gpio.dtbo\"]";
-          type = types.listOf types.path;
+          example = literalExample ''
+            [
+              { name = "pps"; dtsFile = ./dts/pps.dts; }
+              { name = "spi";
+                dtsText = "...";
+              }
+              { name = "precompiled"; dtboFile = ./dtbos/example.dtbo; }
+            ]
+          '';
+          type = types.listOf (types.coercedTo types.path (path: {
+            name = baseNameOf path;
+            dtboFile = path;
+          }) overlayType);
           description = ''
-            A path containing device tree overlays (.dtbo) to be applied to all
-            base device-trees.
+            List of overlays to apply to base device-tree (.dtb) files.
           '';
         };
 
@@ -43,14 +179,27 @@ in {
           type = types.nullOr types.path;
           internal = true;
           description = ''
-            A path containing the result of applying `overlays` to `base`.
+            A path containing the result of applying `overlays` to `kernelPackage`.
           '';
         };
       };
   };
 
   config = mkIf (cfg.enable) {
+
+    assertions = let
+      invalidOverlay = o: isNull o.dtsFile && isNull o.dtsText && isNull o.dtboFile;
+    in lib.singleton {
+      assertion = lib.all (o: !invalidOverlay o) cfg.overlays;
+      message = ''
+        deviceTree overlay needs one of dtsFile, dtsText or dtboFile set.
+        Offending overlay(s):
+        ${toString (map (o: o.name) (builtins.filter invalidOverlay cfg.overlays))}
+      '';
+    };
+
     hardware.deviceTree.package = if (cfg.overlays != [])
-      then pkgs.deviceTree.applyOverlays cfg.base cfg.overlays else cfg.base;
+      then pkgs.deviceTree.applyOverlays (filterDTBs dtbsWithSymbols) (withDTBOs cfg.overlays)
+      else (filterDTBs cfg.kernelPackage);
   };
 }
diff --git a/nixpkgs/nixos/modules/hardware/logitech.nix b/nixpkgs/nixos/modules/hardware/logitech.nix
index d6f43bdddcc8..3ebe6aacf5d6 100644
--- a/nixpkgs/nixos/modules/hardware/logitech.nix
+++ b/nixpkgs/nixos/modules/hardware/logitech.nix
@@ -5,24 +5,92 @@ with lib;
 let
   cfg = config.hardware.logitech;
 
-in {
+  vendor = "046d";
+
+  daemon = "g15daemon";
+
+in
+{
+  imports = [
+    (mkRenamedOptionModule [ "hardware" "logitech" "enable" ] [ "hardware" "logitech" "wireless" "enable" ])
+    (mkRenamedOptionModule [ "hardware" "logitech" "enableGraphical" ] [ "hardware" "logitech" "wireless" "enableGraphical" ])
+  ];
+
   options.hardware.logitech = {
-    enable = mkEnableOption "Logitech Devices";
 
-    enableGraphical = mkOption {
-      type = types.bool;
-      default = false;
-      description = "Enable graphical support applications.";
+    lcd = {
+      enable = mkEnableOption "Logitech LCD Devices";
+
+      startWhenNeeded = mkOption {
+        type = types.bool;
+        default = true;
+        description = ''
+          Only run the service when an actual supported device is plugged.
+        '';
+      };
+
+      devices = mkOption {
+        type = types.listOf types.str;
+        default = [ "0a07" "c222" "c225" "c227" "c251" ];
+        description = ''
+          List of USB device ids supported by g15daemon.
+          </para>
+          <para>
+          You most likely do not need to change this.
+        '';
+      };
+    };
+
+    wireless = {
+      enable = mkEnableOption "Logitech Wireless Devices";
+
+      enableGraphical = mkOption {
+        type = types.bool;
+        default = false;
+        description = "Enable graphical support applications.";
+      };
     };
   };
 
-  config = lib.mkIf cfg.enable {
-    environment.systemPackages = [
-      pkgs.ltunify
-    ] ++ lib.optional cfg.enableGraphical pkgs.solaar;
+  config = lib.mkIf (cfg.wireless.enable || cfg.lcd.enable) {
+    environment.systemPackages = []
+      ++ lib.optional cfg.wireless.enable pkgs.ltunify
+      ++ lib.optional cfg.wireless.enableGraphical pkgs.solaar;
+
+    services.udev = {
+      # ltunifi and solaar both provide udev rules but the most up-to-date have been split
+      # out into a dedicated derivation
 
-    # ltunifi and solaar both provide udev rules but the most up-to-date have been split
-    # out into a dedicated derivation
-    services.udev.packages = with pkgs; [ logitech-udev-rules ];
+      packages = []
+      ++ lib.optional cfg.wireless.enable pkgs.logitech-udev-rules
+      ++ lib.optional cfg.lcd.enable pkgs.g15daemon;
+
+      extraRules = ''
+        # nixos: hardware.logitech.lcd
+      '' + lib.concatMapStringsSep "\n" (
+        dev:
+          ''ACTION=="add", SUBSYSTEMS=="usb", ATTRS{idVendor}=="${vendor}", ATTRS{idProduct}=="${dev}", TAG+="systemd", ENV{SYSTEMD_WANTS}+="${daemon}.service"''
+      ) cfg.lcd.devices;
+    };
+
+    systemd.services."${daemon}" = lib.mkIf cfg.lcd.enable {
+      description = "Logitech LCD Support Daemon";
+      documentation = [ "man:g15daemon(1)" ];
+      wantedBy = lib.mkIf (! cfg.lcd.startWhenNeeded) "multi-user.target";
+
+      serviceConfig = {
+        Type = "forking";
+        ExecStart = "${pkgs.g15daemon}/bin/g15daemon";
+        # we patch it to write to /run/g15daemon/g15daemon.pid instead of
+        # /run/g15daemon.pid so systemd will do the cleanup for us.
+        PIDFile = "/run/${daemon}/g15daemon.pid";
+        PrivateTmp = true;
+        PrivateNetwork = true;
+        ProtectHome = "tmpfs";
+        ProtectSystem = "full"; # strict doesn't work
+        RuntimeDirectory = daemon;
+        Restart = "on-failure";
+      };
+    };
   };
 }
diff --git a/nixpkgs/nixos/modules/hardware/onlykey.nix b/nixpkgs/nixos/modules/hardware/onlykey.nix
index b6820fe01911..07358c8a8782 100644
--- a/nixpkgs/nixos/modules/hardware/onlykey.nix
+++ b/nixpkgs/nixos/modules/hardware/onlykey.nix
@@ -26,7 +26,7 @@ with lib;
   ####### implementation
 
   config = mkIf config.hardware.onlykey.enable {
-    services.udev.extraRules = builtin.readFile ./onlykey.udev;
+    services.udev.extraRules = builtins.readFile ./onlykey.udev;
   };
 
 
diff --git a/nixpkgs/nixos/modules/hardware/printers.nix b/nixpkgs/nixos/modules/hardware/printers.nix
index 56b91933477d..752de41f26de 100644
--- a/nixpkgs/nixos/modules/hardware/printers.nix
+++ b/nixpkgs/nixos/modules/hardware/printers.nix
@@ -84,7 +84,7 @@ in {
             model = mkOption {
               type = types.str;
               example = literalExample ''
-                gutenprint.''${lib.version.majorMinor (lib.getVersion pkgs.cups)}://brother-hl-5140/expert
+                gutenprint.''${lib.versions.majorMinor (lib.getVersion pkgs.gutenprint)}://brother-hl-5140/expert
               '';
               description = ''
                 Location of the ppd driver file for the printer.
diff --git a/nixpkgs/nixos/modules/hardware/system-76.nix b/nixpkgs/nixos/modules/hardware/system-76.nix
new file mode 100644
index 000000000000..48eb63f4f22d
--- /dev/null
+++ b/nixpkgs/nixos/modules/hardware/system-76.nix
@@ -0,0 +1,56 @@
+{ config, lib, pkgs, ... }:
+
+let
+  inherit (lib) mkOption mkEnableOption types mkIf mkMerge optional versionOlder;
+  cfg = config.hardware.system76;
+
+  kpkgs = config.boot.kernelPackages;
+  modules = [ "system76" "system76-io" ] ++ (optional (versionOlder kpkgs.kernel.version "5.5") "system76-acpi");
+  modulePackages = map (m: kpkgs.${m}) modules;
+  moduleConfig = mkIf cfg.kernel-modules.enable {
+    boot.extraModulePackages = modulePackages;
+
+    boot.kernelModules = modules;
+
+    services.udev.packages = modulePackages;
+  };
+
+  firmware-pkg = pkgs.system76-firmware;
+  firmwareConfig = mkIf cfg.firmware-daemon.enable {
+    services.dbus.packages = [ firmware-pkg ];
+
+    systemd.services.system76-firmware-daemon = {
+      description = "The System76 Firmware Daemon";
+
+      serviceConfig = {
+        ExecStart = "${firmware-pkg}/bin/system76-firmware-daemon";
+
+        Restart = "on-failure";
+      };
+
+      wantedBy = [ "multi-user.target" ];
+    };
+  };
+in {
+  options = {
+    hardware.system76 = {
+      enableAll = mkEnableOption "all recommended configuration for system76 systems";
+
+      firmware-daemon.enable = mkOption {
+        default = cfg.enableAll;
+        example = true;
+        description = "Whether to enable the system76 firmware daemon";
+        type = types.bool;
+      };
+
+      kernel-modules.enable = mkOption {
+        default = cfg.enableAll;
+        example = true;
+        description = "Whether to make the system76 out-of-tree kernel modules available";
+        type = types.bool;
+      };
+    };
+  };
+
+  config = mkMerge [ moduleConfig firmwareConfig ];
+}
diff --git a/nixpkgs/nixos/modules/hardware/tuxedo-keyboard.nix b/nixpkgs/nixos/modules/hardware/tuxedo-keyboard.nix
index 898eed244935..97af7c61f3c9 100644
--- a/nixpkgs/nixos/modules/hardware/tuxedo-keyboard.nix
+++ b/nixpkgs/nixos/modules/hardware/tuxedo-keyboard.nix
@@ -2,7 +2,7 @@
 
 with lib;
 
-let 
+let
   cfg = config.hardware.tuxedo-keyboard;
   tuxedo-keyboard = config.boot.kernelPackages.tuxedo-keyboard;
 in
@@ -27,7 +27,7 @@ in
       '';
     };
 
-    config = mkIf cfg.enable 
+    config = mkIf cfg.enable
     {
       boot.kernelModules = ["tuxedo_keyboard"];
       boot.extraModulePackages = [ tuxedo-keyboard ];
diff --git a/nixpkgs/nixos/modules/hardware/video/hidpi.nix b/nixpkgs/nixos/modules/hardware/video/hidpi.nix
new file mode 100644
index 000000000000..ac72b652504e
--- /dev/null
+++ b/nixpkgs/nixos/modules/hardware/video/hidpi.nix
@@ -0,0 +1,16 @@
+{ lib, pkgs, config, ...}:
+with lib;
+
+{
+  options.hardware.video.hidpi.enable = mkEnableOption "Font/DPI configuration optimized for HiDPI displays";
+
+  config = mkIf config.hardware.video.hidpi.enable {
+    console.font = lib.mkDefault "${pkgs.terminus_font}/share/consolefonts/ter-v32n.psf.gz";
+
+    # Needed when typing in passwords for full disk encryption
+    console.earlySetup = mkDefault true;
+    boot.loader.systemd-boot.consoleMode = mkDefault "1";
+
+    # TODO Find reasonable defaults X11 & wayland
+  };
+}
diff --git a/nixpkgs/nixos/modules/hardware/video/nvidia.nix b/nixpkgs/nixos/modules/hardware/video/nvidia.nix
index 6328971492c5..2acb891f1a9a 100644
--- a/nixpkgs/nixos/modules/hardware/video/nvidia.nix
+++ b/nixpkgs/nixos/modules/hardware/video/nvidia.nix
@@ -16,6 +16,8 @@ let
         kernelPackages.nvidia_x11
     else if elem "nvidiaBeta" drivers then
         kernelPackages.nvidia_x11_beta
+    else if elem "nvidiaVulkanBeta" drivers then
+        kernelPackages.nvidia_x11_vulkan_beta
     else if elem "nvidiaLegacy304" drivers then
       kernelPackages.nvidia_x11_legacy304
     else if elem "nvidiaLegacy340" drivers then
diff --git a/nixpkgs/nixos/modules/hardware/video/uvcvideo/default.nix b/nixpkgs/nixos/modules/hardware/video/uvcvideo/default.nix
index 7e3e94fdf2bd..cf6aa052abb0 100644
--- a/nixpkgs/nixos/modules/hardware/video/uvcvideo/default.nix
+++ b/nixpkgs/nixos/modules/hardware/video/uvcvideo/default.nix
@@ -26,7 +26,7 @@ in
           Whether to enable <command>uvcvideo</command> dynamic controls.
 
           Note that enabling this brings the <command>uvcdynctrl</command> tool
-          into your environement and register all dynamic controls from
+          into your environment and register all dynamic controls from
           specified <command>packages</command> to the <command>uvcvideo</command> driver.
         '';
       };
diff --git a/nixpkgs/nixos/modules/hardware/xpadneo.nix b/nixpkgs/nixos/modules/hardware/xpadneo.nix
new file mode 100644
index 000000000000..d504697e61fd
--- /dev/null
+++ b/nixpkgs/nixos/modules/hardware/xpadneo.nix
@@ -0,0 +1,29 @@
+{ config, lib, ... }:
+
+with lib;
+let
+  cfg = config.hardware.xpadneo;
+in
+{
+  options.hardware.xpadneo = {
+    enable = mkEnableOption "the xpadneo driver for Xbox One wireless controllers";
+  };
+
+  config = mkIf cfg.enable {
+    boot = {
+      # Must disable Enhanced Retransmission Mode to support bluetooth pairing
+      # https://wiki.archlinux.org/index.php/Gamepad#Connect_Xbox_Wireless_Controller_with_Bluetooth
+      extraModprobeConfig =
+        mkIf
+          config.hardware.bluetooth.enable
+          "options bluetooth disable_ertm=1";
+
+      extraModulePackages = with config.boot.kernelPackages; [ xpadneo ];
+      kernelModules = [ "hid_xpadneo" ];
+    };
+  };
+
+  meta = {
+    maintainers = with maintainers; [ metadark ];
+  };
+}
diff --git a/nixpkgs/nixos/modules/i18n/input-method/ibus.nix b/nixpkgs/nixos/modules/i18n/input-method/ibus.nix
index b4746b21b653..cf24ecf58631 100644
--- a/nixpkgs/nixos/modules/i18n/input-method/ibus.nix
+++ b/nixpkgs/nixos/modules/i18n/input-method/ibus.nix
@@ -64,7 +64,7 @@ in
     # Without dconf enabled it is impossible to use IBus
     programs.dconf.enable = true;
 
-    programs.dconf.profiles.ibus = "${ibusPackage}/etc/dconf/profile/ibus";
+    programs.dconf.packages = [ ibusPackage ];
 
     services.dbus.packages = [
       ibusAutostart
diff --git a/nixpkgs/nixos/modules/i18n/input-method/uim.nix b/nixpkgs/nixos/modules/i18n/input-method/uim.nix
index 7ad68bf851fe..459294657e0a 100644
--- a/nixpkgs/nixos/modules/i18n/input-method/uim.nix
+++ b/nixpkgs/nixos/modules/i18n/input-method/uim.nix
@@ -2,7 +2,7 @@
 
 with lib;
 
-let 
+let
   cfg = config.i18n.inputMethod.uim;
 in
 {
diff --git a/nixpkgs/nixos/modules/installer/cd-dvd/installation-cd-graphical-gnome.nix b/nixpkgs/nixos/modules/installer/cd-dvd/installation-cd-graphical-gnome.nix
index 3707c4b7ec62..8c98691116dc 100644
--- a/nixpkgs/nixos/modules/installer/cd-dvd/installation-cd-graphical-gnome.nix
+++ b/nixpkgs/nixos/modules/installer/cd-dvd/installation-cd-graphical-gnome.nix
@@ -11,15 +11,17 @@ with lib;
 
   services.xserver.desktopManager.gnome3.enable = true;
 
-  services.xserver.displayManager.gdm = {
-    enable = true;
-    # autoSuspend makes the machine automatically suspend after inactivity.
-    # It's possible someone could/try to ssh'd into the machine and obviously
-    # have issues because it's inactive.
-    # See:
-    # * https://github.com/NixOS/nixpkgs/pull/63790
-    # * https://gitlab.gnome.org/GNOME/gnome-control-center/issues/22
-    autoSuspend = false;
+  services.xserver.displayManager = {
+    gdm = {
+      enable = true;
+      # autoSuspend makes the machine automatically suspend after inactivity.
+      # It's possible someone could/try to ssh'd into the machine and obviously
+      # have issues because it's inactive.
+      # See:
+      # * https://github.com/NixOS/nixpkgs/pull/63790
+      # * https://gitlab.gnome.org/GNOME/gnome-control-center/issues/22
+      autoSuspend = false;
+    };
     autoLogin = {
       enable = true;
       user = "nixos";
diff --git a/nixpkgs/nixos/modules/installer/cd-dvd/installation-cd-graphical-plasma5.nix b/nixpkgs/nixos/modules/installer/cd-dvd/installation-cd-graphical-plasma5.nix
index e76e06654aca..098c2b2870b0 100644
--- a/nixpkgs/nixos/modules/installer/cd-dvd/installation-cd-graphical-plasma5.nix
+++ b/nixpkgs/nixos/modules/installer/cd-dvd/installation-cd-graphical-plasma5.nix
@@ -16,8 +16,8 @@ with lib;
     };
 
     # Automatically login as nixos.
-    displayManager.sddm = {
-      enable = true;
+    displayManager = {
+      sddm.enable = true;
       autoLogin = {
         enable = true;
         user = "nixos";
diff --git a/nixpkgs/nixos/modules/installer/cd-dvd/iso-image.nix b/nixpkgs/nixos/modules/installer/cd-dvd/iso-image.nix
index 1cd2252ecf24..405fbfa10dbf 100644
--- a/nixpkgs/nixos/modules/installer/cd-dvd/iso-image.nix
+++ b/nixpkgs/nixos/modules/installer/cd-dvd/iso-image.nix
@@ -417,6 +417,14 @@ in
       '';
     };
 
+    isoImage.squashfsCompression = mkOption {
+      default = "xz -Xdict-size 100%";
+      description = ''
+        Compression settings to use for the squashfs nix store.
+      '';
+      example = "zstd -Xcompression-level 6";
+    };
+
     isoImage.edition = mkOption {
       default = "";
       description = ''
@@ -614,6 +622,7 @@ in
     # Create the squashfs image that contains the Nix store.
     system.build.squashfsStore = pkgs.callPackage ../../../lib/make-squashfs.nix {
       storeContents = config.isoImage.storeContents;
+      comp = config.isoImage.squashfsCompression;
     };
 
     # Individual files to be included on the CD, outside of the Nix
diff --git a/nixpkgs/nixos/modules/installer/cd-dvd/sd-image-aarch64.nix b/nixpkgs/nixos/modules/installer/cd-dvd/sd-image-aarch64.nix
index 2d34406a0320..bef6cd2fb5a2 100644
--- a/nixpkgs/nixos/modules/installer/cd-dvd/sd-image-aarch64.nix
+++ b/nixpkgs/nixos/modules/installer/cd-dvd/sd-image-aarch64.nix
@@ -2,12 +2,6 @@
 # nix-build nixos -I nixos-config=nixos/modules/installer/cd-dvd/sd-image-aarch64.nix -A config.system.build.sdImage
 { config, lib, pkgs, ... }:
 
-let
-  extlinux-conf-builder =
-    import ../../system/boot/loader/generic-extlinux-compatible/extlinux-conf-builder.nix {
-      pkgs = pkgs.buildPackages;
-    };
-in
 {
   imports = [
     ../../profiles/base.nix
@@ -56,7 +50,7 @@ in
       '';
     populateRootCommands = ''
       mkdir -p ./files/boot
-      ${extlinux-conf-builder} -t 3 -c ${config.system.build.toplevel} -d ./files/boot
+      ${config.boot.loader.generic-extlinux-compatible.populateCmd} -c ${config.system.build.toplevel} -d ./files/boot
     '';
   };
 
diff --git a/nixpkgs/nixos/modules/installer/cd-dvd/sd-image-armv7l-multiplatform.nix b/nixpkgs/nixos/modules/installer/cd-dvd/sd-image-armv7l-multiplatform.nix
index 651d1a36dc11..d2ba611532e0 100644
--- a/nixpkgs/nixos/modules/installer/cd-dvd/sd-image-armv7l-multiplatform.nix
+++ b/nixpkgs/nixos/modules/installer/cd-dvd/sd-image-armv7l-multiplatform.nix
@@ -2,12 +2,6 @@
 # nix-build nixos -I nixos-config=nixos/modules/installer/cd-dvd/sd-image-armv7l-multiplatform.nix -A config.system.build.sdImage
 { config, lib, pkgs, ... }:
 
-let
-  extlinux-conf-builder =
-    import ../../system/boot/loader/generic-extlinux-compatible/extlinux-conf-builder.nix {
-      pkgs = pkgs.buildPackages;
-    };
-in
 {
   imports = [
     ../../profiles/base.nix
@@ -53,7 +47,7 @@ in
       '';
     populateRootCommands = ''
       mkdir -p ./files/boot
-      ${extlinux-conf-builder} -t 3 -c ${config.system.build.toplevel} -d ./files/boot
+      ${config.boot.loader.generic-extlinux-compatible.populateCmd} -c ${config.system.build.toplevel} -d ./files/boot
     '';
   };
 
diff --git a/nixpkgs/nixos/modules/installer/cd-dvd/sd-image-raspberrypi.nix b/nixpkgs/nixos/modules/installer/cd-dvd/sd-image-raspberrypi.nix
index ba4127eaa0e8..40a01f961771 100644
--- a/nixpkgs/nixos/modules/installer/cd-dvd/sd-image-raspberrypi.nix
+++ b/nixpkgs/nixos/modules/installer/cd-dvd/sd-image-raspberrypi.nix
@@ -2,12 +2,6 @@
 # nix-build nixos -I nixos-config=nixos/modules/installer/cd-dvd/sd-image-raspberrypi.nix -A config.system.build.sdImage
 { config, lib, pkgs, ... }:
 
-let
-  extlinux-conf-builder =
-    import ../../system/boot/loader/generic-extlinux-compatible/extlinux-conf-builder.nix {
-      pkgs = pkgs.buildPackages;
-    };
-in
 {
   imports = [
     ../../profiles/base.nix
@@ -42,7 +36,7 @@ in
       '';
     populateRootCommands = ''
       mkdir -p ./files/boot
-      ${extlinux-conf-builder} -t 3 -c ${config.system.build.toplevel} -d ./files/boot
+      ${config.boot.loader.generic-extlinux-compatible.populateCmd} -c ${config.system.build.toplevel} -d ./files/boot
     '';
   };
 
diff --git a/nixpkgs/nixos/modules/installer/cd-dvd/sd-image-raspberrypi4.nix b/nixpkgs/nixos/modules/installer/cd-dvd/sd-image-raspberrypi4.nix
index c545a1e7e242..87545e842030 100644
--- a/nixpkgs/nixos/modules/installer/cd-dvd/sd-image-raspberrypi4.nix
+++ b/nixpkgs/nixos/modules/installer/cd-dvd/sd-image-raspberrypi4.nix
@@ -18,6 +18,7 @@
 
   sdImage = {
     firmwareSize = 128;
+    firmwarePartitionName = "NIXOS_BOOT";
     # This is a hack to avoid replicating config.txt from boot.loader.raspberryPi
     populateFirmwareCommands =
       "${config.system.build.installBootLoader} ${config.system.build.toplevel} -d ./firmware";
@@ -25,6 +26,12 @@
     populateRootCommands = "";
   };
 
+  fileSystems."/boot/firmware" = {
+    # This effectively "renames" the attrsOf entry set in sd-image.nix
+    mountPoint = "/boot";
+    neededForBoot = true;
+  };
+
   # the installation media is also the installation target,
   # so we don't want to provide the installation configuration.nix.
   installer.cloneConfig = false;
diff --git a/nixpkgs/nixos/modules/installer/cd-dvd/sd-image.nix b/nixpkgs/nixos/modules/installer/cd-dvd/sd-image.nix
index 98c12e30633c..231c7bf0a6c2 100644
--- a/nixpkgs/nixos/modules/installer/cd-dvd/sd-image.nix
+++ b/nixpkgs/nixos/modules/installer/cd-dvd/sd-image.nix
@@ -63,6 +63,14 @@ in
       '';
     };
 
+    firmwarePartitionName = mkOption {
+      type = types.str;
+      default = "FIRMWARE";
+      description = ''
+        Name of the filesystem which holds the boot firmware.
+      '';
+    };
+
     rootPartitionUUID = mkOption {
       type = types.nullOr types.str;
       default = null;
@@ -91,7 +99,7 @@ in
     };
 
     populateRootCommands = mkOption {
-      example = literalExample "''\${extlinux-conf-builder} -t 3 -c \${config.system.build.toplevel} -d ./files/boot''";
+      example = literalExample "''\${config.boot.loader.generic-extlinux-compatible.populateCmd} -c \${config.system.build.toplevel} -d ./files/boot''";
       description = ''
         Shell commands to populate the ./files directory.
         All files in that directory are copied to the
@@ -100,6 +108,15 @@ in
       '';
     };
 
+    postBuildCommands = mkOption {
+      example = literalExample "'' dd if=\${pkgs.myBootLoader}/SPL of=$img bs=1024 seek=1 conv=notrunc ''";
+      default = "";
+      description = ''
+        Shell commands to run after the image is built.
+        Can be used for boards requiring to dd u-boot SPL before actual partitions.
+      '';
+    };
+
     compressImage = mkOption {
       type = types.bool;
       default = true;
@@ -114,7 +131,7 @@ in
   config = {
     fileSystems = {
       "/boot/firmware" = {
-        device = "/dev/disk/by-label/FIRMWARE";
+        device = "/dev/disk/by-label/${config.sdImage.firmwarePartitionName}";
         fsType = "vfat";
         # Alternatively, this could be removed from the configuration.
         # The filesystem is not needed at runtime, it could be treated
@@ -178,7 +195,7 @@ in
         # Create a FAT32 /boot/firmware partition of suitable size into firmware_part.img
         eval $(partx $img -o START,SECTORS --nr 1 --pairs)
         truncate -s $((SECTORS * 512)) firmware_part.img
-        faketime "1970-01-01 00:00:00" mkfs.vfat -i ${config.sdImage.firmwarePartitionID} -n FIRMWARE firmware_part.img
+        faketime "1970-01-01 00:00:00" mkfs.vfat -i ${config.sdImage.firmwarePartitionID} -n ${config.sdImage.firmwarePartitionName} firmware_part.img
 
         # Populate the files intended for /boot/firmware
         mkdir firmware
@@ -189,6 +206,9 @@ in
         # Verify the FAT partition before copying it.
         fsck.vfat -vn firmware_part.img
         dd conv=notrunc if=firmware_part.img of=$img seek=$START count=$SECTORS
+
+        ${config.sdImage.postBuildCommands}
+
         if test -n "$compressImage"; then
             zstd -T$NIX_BUILD_CORES --rm $img
         fi
diff --git a/nixpkgs/nixos/modules/installer/cd-dvd/system-tarball-pc-readme.txt b/nixpkgs/nixos/modules/installer/cd-dvd/system-tarball-pc-readme.txt
index 84252f292c54..887bf60d0fbe 100644
--- a/nixpkgs/nixos/modules/installer/cd-dvd/system-tarball-pc-readme.txt
+++ b/nixpkgs/nixos/modules/installer/cd-dvd/system-tarball-pc-readme.txt
@@ -63,7 +63,7 @@ Activate the system: look for a directory in nix/store similar to:
 Having found it, activate that nixos system *twice*:
   chroot . /nix/store/SOMETHING-nixos-SOMETHING/activate
   chroot . /nix/store/SOMETHING-nixos-SOMETHING/activate
-  
+
 This runs a 'hostname' command. Restore your old hostname with:
   hostname OLDHOSTNAME
 
diff --git a/nixpkgs/nixos/modules/installer/tools/nix-fallback-paths.nix b/nixpkgs/nixos/modules/installer/tools/nix-fallback-paths.nix
index 35a7b382b7cf..a15a2dbadb8c 100644
--- a/nixpkgs/nixos/modules/installer/tools/nix-fallback-paths.nix
+++ b/nixpkgs/nixos/modules/installer/tools/nix-fallback-paths.nix
@@ -1,6 +1,6 @@
 {
-  x86_64-linux = "/nix/store/j8dbv5w6jl34caywh2ygdy88knx1mdf7-nix-2.3.6";
-  i686-linux = "/nix/store/9fqvbdisahqp0238vrs7wn5anpri0a65-nix-2.3.6";
-  aarch64-linux = "/nix/store/72pwn0nm9bjqx9vpi8sgh4bl6g5wh814-nix-2.3.6";
-  x86_64-darwin = "/nix/store/g37vk77m90p5zcl5nixjlzp3vqpisfn5-nix-2.3.6";
+  x86_64-linux = "/nix/store/4vz8sh9ngx34ivi0bw5hlycxdhvy5hvz-nix-2.3.7";
+  i686-linux = "/nix/store/dzxkg9lpp60bjmzvagns42vqlz3yq5kx-nix-2.3.7";
+  aarch64-linux = "/nix/store/cfvf8nl8mwyw817by5y8zd3s8pnf5m9f-nix-2.3.7";
+  x86_64-darwin = "/nix/store/5ira7xgs92inqz1x8l0n1wci4r79hnd0-nix-2.3.7";
 }
diff --git a/nixpkgs/nixos/modules/installer/tools/nixos-build-vms/nixos-build-vms.sh b/nixpkgs/nixos/modules/installer/tools/nixos-build-vms/nixos-build-vms.sh
index 25106733087e..2a6c3ab11497 100644
--- a/nixpkgs/nixos/modules/installer/tools/nixos-build-vms/nixos-build-vms.sh
+++ b/nixpkgs/nixos/modules/installer/tools/nixos-build-vms/nixos-build-vms.sh
@@ -1,4 +1,4 @@
-#! @shell@ -e
+#! @runtimeShell@ -e
 
 # Shows the usage of this command to the user
 
diff --git a/nixpkgs/nixos/modules/installer/tools/nixos-enter.sh b/nixpkgs/nixos/modules/installer/tools/nixos-enter.sh
index 1fdd4627a902..c72ef6e9c28b 100644
--- a/nixpkgs/nixos/modules/installer/tools/nixos-enter.sh
+++ b/nixpkgs/nixos/modules/installer/tools/nixos-enter.sh
@@ -1,4 +1,4 @@
-#! @shell@
+#! @runtimeShell@
 
 set -e
 
diff --git a/nixpkgs/nixos/modules/installer/tools/nixos-generate-config.pl b/nixpkgs/nixos/modules/installer/tools/nixos-generate-config.pl
index 422c405054d5..c8303a6eb602 100644
--- a/nixpkgs/nixos/modules/installer/tools/nixos-generate-config.pl
+++ b/nixpkgs/nixos/modules/installer/tools/nixos-generate-config.pl
@@ -497,8 +497,8 @@ if (-f $fb_modes_file && -r $fb_modes_file) {
     $modes =~ m/([0-9]+)x([0-9]+)/;
     my $console_width = $1, my $console_height = $2;
     if ($console_width > 1920) {
-        push @attrs, "# High-DPI console";
-        push @attrs, 'console.font = lib.mkDefault "${pkgs.terminus_font}/share/consolefonts/ter-u28n.psf.gz";';
+        push @attrs, "# high-resolution display";
+        push @attrs, 'hardware.video.hidpi.enable = lib.mkDefault true;';
     }
 }
 
@@ -628,6 +628,7 @@ EOF
         write_file($fn, <<EOF);
 @configuration@
 EOF
+        print STDERR "For more hardware-specific settings, see https://github.com/NixOS/nixos-hardware"
     } else {
         print STDERR "warning: not overwriting existing $fn\n";
     }
diff --git a/nixpkgs/nixos/modules/installer/tools/nixos-install.sh b/nixpkgs/nixos/modules/installer/tools/nixos-install.sh
index 1bccbbfaf245..a180d1bc4c19 100644
--- a/nixpkgs/nixos/modules/installer/tools/nixos-install.sh
+++ b/nixpkgs/nixos/modules/installer/tools/nixos-install.sh
@@ -1,4 +1,4 @@
-#! @shell@
+#! @runtimeShell@
 
 set -e
 shopt -s nullglob
@@ -10,6 +10,7 @@ umask 0022
 
 # Parse the command line for the -I flag
 extraBuildFlags=()
+flakeFlags=()
 
 mountPoint=/mnt
 channelPath=
@@ -34,6 +35,23 @@ while [ "$#" -gt 0 ]; do
         --system|--closure)
             system="$1"; shift 1
             ;;
+        --flake)
+          flake="$1"
+          flakeFlags=(--experimental-features 'nix-command flakes')
+          shift 1
+          ;;
+        --recreate-lock-file|--no-update-lock-file|--no-write-lock-file|--no-registries|--commit-lock-file)
+          lockFlags+=("$i")
+          ;;
+        --update-input)
+          j="$1"; shift 1
+          lockFlags+=("$i" "$j")
+          ;;
+        --override-input)
+          j="$1"; shift 1
+          k="$1"; shift 1
+          lockFlags+=("$i" "$j" "$k")
+          ;;
         --channel)
             channelPath="$1"; shift 1
             ;;
@@ -71,6 +89,17 @@ if ! test -e "$mountPoint"; then
     exit 1
 fi
 
+# Verify permissions are okay-enough
+checkPath="$(realpath "$mountPoint")"
+while [[ "$checkPath" != "/" ]]; do
+    mode="$(stat -c '%a' "$checkPath")"
+    if [[ "${mode: -1}" -lt "5" ]]; then
+        echo "path $checkPath should have permissions 755, but had permissions $mode. Consider running 'chmod o+rx $checkPath'."
+        exit 1
+    fi
+    checkPath="$(dirname "$checkPath")"
+done
+
 # Get the path of the NixOS configuration file.
 if [[ -z $NIXOS_CONFIG ]]; then
     NIXOS_CONFIG=$mountPoint/etc/nixos/configuration.nix
@@ -81,14 +110,32 @@ if [[ ${NIXOS_CONFIG:0:1} != / ]]; then
     exit 1
 fi
 
-if [[ ! -e $NIXOS_CONFIG && -z $system ]]; then
+if [[ -n $flake ]]; then
+    if [[ $flake =~ ^(.*)\#([^\#\"]*)$ ]]; then
+       flake="${BASH_REMATCH[1]}"
+       flakeAttr="${BASH_REMATCH[2]}"
+    fi
+    if [[ -z "$flakeAttr" ]]; then
+        echo "Please specify the name of the NixOS configuration to be installed, as a URI fragment in the flake-uri."
+        echo "For example, to use the output nixosConfigurations.foo from the flake.nix, append \"#foo\" to the flake-uri."
+        exit 1
+    fi
+    flakeAttr="nixosConfigurations.\"$flakeAttr\""
+fi
+
+# Resolve the flake.
+if [[ -n $flake ]]; then
+    flake=$(nix "${flakeFlags[@]}" flake info --json "${extraBuildFlags[@]}" "${lockFlags[@]}" -- "$flake" | jq -r .url)
+fi
+
+if [[ ! -e $NIXOS_CONFIG && -z $system && -z $flake ]]; then
     echo "configuration file $NIXOS_CONFIG doesn't exist"
     exit 1
 fi
 
 # A place to drop temporary stuff.
-tmpdir="$(mktemp -d -p $mountPoint)"
-trap "rm -rf $tmpdir" EXIT
+tmpdir="$(mktemp -d -p "$mountPoint")"
+trap 'rm -rf $tmpdir' EXIT
 
 # store temporary files on target filesystem by default
 export TMPDIR=${TMPDIR:-$tmpdir}
@@ -97,12 +144,19 @@ sub="auto?trusted=1"
 
 # Build the system configuration in the target filesystem.
 if [[ -z $system ]]; then
-    echo "building the configuration in $NIXOS_CONFIG..."
     outLink="$tmpdir/system"
-    nix-build --out-link "$outLink" --store "$mountPoint" "${extraBuildFlags[@]}" \
-        --extra-substituters "$sub" \
-        '<nixpkgs/nixos>' -A system -I "nixos-config=$NIXOS_CONFIG" ${verbosity[@]}
-    system=$(readlink -f $outLink)
+    if [[ -z $flake ]]; then
+        echo "building the configuration in $NIXOS_CONFIG..."
+        nix-build --out-link "$outLink" --store "$mountPoint" "${extraBuildFlags[@]}" \
+            --extra-substituters "$sub" \
+            '<nixpkgs/nixos>' -A system -I "nixos-config=$NIXOS_CONFIG" "${verbosity[@]}"
+    else
+        echo "building the flake in $flake..."
+        nix "${flakeFlags[@]}" build "$flake#$flakeAttr.config.system.build.toplevel" \
+            --extra-substituters "$sub" "${verbosity[@]}" \
+            "${extraBuildFlags[@]}" "${lockFlags[@]}" --out-link "$outLink"
+    fi
+    system=$(readlink -f "$outLink")
 fi
 
 # Set the system profile to point to the configuration. TODO: combine
@@ -110,7 +164,7 @@ fi
 # a progress bar.
 nix-env --store "$mountPoint" "${extraBuildFlags[@]}" \
         --extra-substituters "$sub" \
-        -p $mountPoint/nix/var/nix/profiles/system --set "$system" ${verbosity[@]}
+        -p "$mountPoint"/nix/var/nix/profiles/system --set "$system" "${verbosity[@]}"
 
 # Copy the NixOS/Nixpkgs sources to the target as the initial contents
 # of the NixOS channel.
@@ -120,12 +174,12 @@ if [[ -z $noChannelCopy ]]; then
     fi
     if [[ -n $channelPath ]]; then
         echo "copying channel..."
-        mkdir -p $mountPoint/nix/var/nix/profiles/per-user/root
+        mkdir -p "$mountPoint"/nix/var/nix/profiles/per-user/root
         nix-env --store "$mountPoint" "${extraBuildFlags[@]}" --extra-substituters "$sub" \
-                -p $mountPoint/nix/var/nix/profiles/per-user/root/channels --set "$channelPath" --quiet \
-                ${verbosity[@]}
-        install -m 0700 -d $mountPoint/root/.nix-defexpr
-        ln -sfn /nix/var/nix/profiles/per-user/root/channels $mountPoint/root/.nix-defexpr/channels
+                -p "$mountPoint"/nix/var/nix/profiles/per-user/root/channels --set "$channelPath" --quiet \
+                "${verbosity[@]}"
+        install -m 0700 -d "$mountPoint"/root/.nix-defexpr
+        ln -sfn /nix/var/nix/profiles/per-user/root/channels "$mountPoint"/root/.nix-defexpr/channels
     fi
 fi
 
@@ -139,7 +193,7 @@ touch "$mountPoint/etc/NIXOS"
 if [[ -z $noBootLoader ]]; then
     echo "installing the boot loader..."
     # Grub needs an mtab.
-    ln -sfn /proc/mounts $mountPoint/etc/mtab
+    ln -sfn /proc/mounts "$mountPoint"/etc/mtab
     NIXOS_INSTALL_BOOTLOADER=1 nixos-enter --root "$mountPoint" -- /run/current-system/bin/switch-to-configuration boot
 fi
 
diff --git a/nixpkgs/nixos/modules/installer/tools/nixos-option/nixos-option.cc b/nixpkgs/nixos/modules/installer/tools/nixos-option/nixos-option.cc
index 1a7b07a74f8a..f779d82edbd6 100644
--- a/nixpkgs/nixos/modules/installer/tools/nixos-option/nixos-option.cc
+++ b/nixpkgs/nixos/modules/installer/tools/nixos-option/nixos-option.cc
@@ -224,7 +224,7 @@ bool optionTypeIs(Context & ctx, Value & v, const std::string & soughtType)
 
 bool isAggregateOptionType(Context & ctx, Value & v)
 {
-    return optionTypeIs(ctx, v, "attrsOf") || optionTypeIs(ctx, v, "listOf") || optionTypeIs(ctx, v, "loaOf");
+    return optionTypeIs(ctx, v, "attrsOf") || optionTypeIs(ctx, v, "listOf");
 }
 
 MakeError(OptionPathError, EvalError);
diff --git a/nixpkgs/nixos/modules/installer/tools/nixos-rebuild.sh b/nixpkgs/nixos/modules/installer/tools/nixos-rebuild.sh
index 354274478a38..08813d17ff99 100644
--- a/nixpkgs/nixos/modules/installer/tools/nixos-rebuild.sh
+++ b/nixpkgs/nixos/modules/installer/tools/nixos-rebuild.sh
@@ -1,6 +1,6 @@
-#! @shell@
+#! @runtimeShell@
 
-if [ -x "@shell@" ]; then export SHELL="@shell@"; fi;
+if [ -x "@runtimeShell@" ]; then export SHELL="@runtimeShell@"; fi;
 
 set -e
 set -o pipefail
@@ -17,11 +17,13 @@ showSyntax() {
 origArgs=("$@")
 extraBuildFlags=()
 lockFlags=()
+flakeFlags=()
 action=
 buildNix=1
 fast=
 rollback=
 upgrade=
+upgrade_all=
 repair=
 profile=/nix/var/nix/profiles/system
 buildHost=
@@ -54,6 +56,10 @@ while [ "$#" -gt 0 ]; do
       --upgrade)
         upgrade=1
         ;;
+      --upgrade-all)
+        upgrade=1
+        upgrade_all=1
+        ;;
       --repair)
         repair=1
         extraBuildFlags+=("$i")
@@ -99,6 +105,7 @@ while [ "$#" -gt 0 ]; do
         ;;
       --flake)
         flake="$1"
+        flakeFlags=(--experimental-features 'nix-command flakes')
         shift 1
         ;;
       --recreate-lock-file|--no-update-lock-file|--no-write-lock-file|--no-registries|--commit-lock-file)
@@ -221,15 +228,22 @@ if [ "$action" = switch -o "$action" = boot -o "$action" = test ]; then
 fi
 
 
-# If ‘--upgrade’ is given, run ‘nix-channel --update nixos’.
+# If ‘--upgrade’ or `--upgrade-all` is given,
+# run ‘nix-channel --update nixos’.
 if [[ -n $upgrade && -z $_NIXOS_REBUILD_REEXEC && -z $flake ]]; then
-    nix-channel --update nixos
+    # If --upgrade-all is passed, or there are other channels that
+    # contain a file called ".update-on-nixos-rebuild", update them as
+    # well. Also upgrade the nixos channel.
 
-    # If there are other channels that contain a file called
-    # ".update-on-nixos-rebuild", update them as well.
     for channelpath in /nix/var/nix/profiles/per-user/root/channels/*; do
-        if [ -e "$channelpath/.update-on-nixos-rebuild" ]; then
-            nix-channel --update "$(basename "$channelpath")"
+        channel_name=$(basename "$channelpath")
+
+        if [[ "$channel_name" == "nixos" ]]; then
+            nix-channel --update "$channel_name"
+        elif [ -e "$channelpath/.update-on-nixos-rebuild" ]; then
+            nix-channel --update "$channel_name"
+        elif [[ -n $upgrade_all ]] ; then
+            nix-channel --update "$channel_name"
         fi
     done
 fi
@@ -281,16 +295,19 @@ fi
 
 # Resolve the flake.
 if [[ -n $flake ]]; then
-    flake=$(nix flake info --json "${extraBuildFlags[@]}" "${lockFlags[@]}" -- "$flake" | jq -r .url)
+    flake=$(nix "${flakeFlags[@]}" flake info --json "${extraBuildFlags[@]}" "${lockFlags[@]}" -- "$flake" | jq -r .url)
 fi
 
 # Find configuration.nix and open editor instead of building.
 if [ "$action" = edit ]; then
     if [[ -z $flake ]]; then
         NIXOS_CONFIG=${NIXOS_CONFIG:-$(nix-instantiate --find-file nixos-config)}
-        exec "${EDITOR:-nano}" "$NIXOS_CONFIG"
+        if [[ -d $NIXOS_CONFIG ]]; then
+            NIXOS_CONFIG=$NIXOS_CONFIG/default.nix
+        fi
+        exec ${EDITOR:-nano} "$NIXOS_CONFIG"
     else
-        exec nix edit "${lockFlags[@]}" -- "$flake#$flakeAttr"
+        exec nix "${flakeFlags[@]}" edit "${lockFlags[@]}" -- "$flake#$flakeAttr"
     fi
     exit 1
 fi
@@ -416,7 +433,7 @@ if [ -z "$rollback" ]; then
             pathToConfig="$(nixBuild '<nixpkgs/nixos>' --no-out-link -A system "${extraBuildFlags[@]}")"
         else
             outLink=$tmpDir/result
-            nix build "$flake#$flakeAttr.config.system.build.toplevel" \
+            nix "${flakeFlags[@]}" build "$flake#$flakeAttr.config.system.build.toplevel" \
               "${extraBuildFlags[@]}" "${lockFlags[@]}" --out-link $outLink
             pathToConfig="$(readlink -f $outLink)"
         fi
@@ -426,22 +443,24 @@ if [ -z "$rollback" ]; then
         if [[ -z $flake ]]; then
             pathToConfig="$(nixBuild '<nixpkgs/nixos>' -A system -k "${extraBuildFlags[@]}")"
         else
-            nix build "$flake#$flakeAttr.config.system.build.toplevel" "${extraBuildFlags[@]}" "${lockFlags[@]}"
+            nix "${flakeFlags[@]}" build "$flake#$flakeAttr.config.system.build.toplevel" "${extraBuildFlags[@]}" "${lockFlags[@]}"
             pathToConfig="$(readlink -f ./result)"
         fi
     elif [ "$action" = build-vm ]; then
         if [[ -z $flake ]]; then
             pathToConfig="$(nixBuild '<nixpkgs/nixos>' -A vm -k "${extraBuildFlags[@]}")"
         else
-            echo "$0: 'build-vm' is not supported with '--flake'" >&2
-            exit 1
+            nix "${flakeFlags[@]}" build "$flake#$flakeAttr.config.system.build.vm" \
+              "${extraBuildFlags[@]}" "${lockFlags[@]}"
+            pathToConfig="$(readlink -f ./result)"
         fi
     elif [ "$action" = build-vm-with-bootloader ]; then
         if [[ -z $flake ]]; then
             pathToConfig="$(nixBuild '<nixpkgs/nixos>' -A vmWithBootLoader -k "${extraBuildFlags[@]}")"
         else
-            echo "$0: 'build-vm-with-bootloader' is not supported with '--flake'" >&2
-            exit 1
+            nix "${flakeFlags[@]}" build "$flake#$flakeAttr.config.system.build.vmWithBootLoader" \
+              "${extraBuildFlags[@]}" "${lockFlags[@]}"
+            pathToConfig="$(readlink -f ./result)"
         fi
     else
         showSyntax
diff --git a/nixpkgs/nixos/modules/installer/tools/nixos-version.sh b/nixpkgs/nixos/modules/installer/tools/nixos-version.sh
index fb0fe26116a6..f5e3f32b3c63 100644
--- a/nixpkgs/nixos/modules/installer/tools/nixos-version.sh
+++ b/nixpkgs/nixos/modules/installer/tools/nixos-version.sh
@@ -1,4 +1,4 @@
-#! @shell@
+#! @runtimeShell@
 
 case "$1" in
   -h|--help)
diff --git a/nixpkgs/nixos/modules/installer/tools/tools.nix b/nixpkgs/nixos/modules/installer/tools/tools.nix
index 111286214248..e1e1b47aafcb 100644
--- a/nixpkgs/nixos/modules/installer/tools/tools.nix
+++ b/nixpkgs/nixos/modules/installer/tools/tools.nix
@@ -14,13 +14,19 @@ let
   nixos-build-vms = makeProg {
     name = "nixos-build-vms";
     src = ./nixos-build-vms/nixos-build-vms.sh;
+    inherit (pkgs) runtimeShell;
   };
 
   nixos-install = makeProg {
     name = "nixos-install";
     src = ./nixos-install.sh;
+    inherit (pkgs) runtimeShell;
     nix = config.nix.package.out;
-    path = makeBinPath [ nixos-enter ];
+    path = makeBinPath [
+      pkgs.nixUnstable
+      pkgs.jq
+      nixos-enter
+    ];
   };
 
   nixos-rebuild =
@@ -28,6 +34,7 @@ let
     makeProg {
       name = "nixos-rebuild";
       src = ./nixos-rebuild.sh;
+      inherit (pkgs) runtimeShell;
       nix = config.nix.package.out;
       nix_x86_64_linux = fallback.x86_64-linux;
       nix_i686_linux = fallback.i686-linux;
@@ -50,6 +57,7 @@ let
   nixos-version = makeProg {
     name = "nixos-version";
     src = ./nixos-version.sh;
+    inherit (pkgs) runtimeShell;
     inherit (config.system.nixos) version codeName revision;
     inherit (config.system) configurationRevision;
     json = builtins.toJSON ({
@@ -64,6 +72,7 @@ let
   nixos-enter = makeProg {
     name = "nixos-enter";
     src = ./nixos-enter.sh;
+    inherit (pkgs) runtimeShell;
   };
 
 in
diff --git a/nixpkgs/nixos/modules/misc/documentation.nix b/nixpkgs/nixos/modules/misc/documentation.nix
index 7ad4be9a02e6..71a40b4f4d6e 100644
--- a/nixpkgs/nixos/modules/misc/documentation.nix
+++ b/nixpkgs/nixos/modules/misc/documentation.nix
@@ -102,6 +102,16 @@ in
         '';
       };
 
+      man.generateCaches = mkOption {
+        type = types.bool;
+        default = false;
+        description = ''
+          Whether to generate the manual page index caches using
+          <literal>mandb(8)</literal>. This allows searching for a page or
+          keyword using utilities like <literal>apropos(1)</literal>.
+        '';
+      };
+
       info.enable = mkOption {
         type = types.bool;
         default = true;
@@ -187,7 +197,33 @@ in
       environment.systemPackages = [ pkgs.man-db ];
       environment.pathsToLink = [ "/share/man" ];
       environment.extraOutputsToInstall = [ "man" ] ++ optional cfg.dev.enable "devman";
-      environment.etc."man.conf".source = "${pkgs.man-db}/etc/man_db.conf";
+      environment.etc."man_db.conf".text =
+        let
+          manualPages = pkgs.buildEnv {
+            name = "man-paths";
+            paths = config.environment.systemPackages;
+            pathsToLink = [ "/share/man" ];
+            extraOutputsToInstall = ["man"];
+            ignoreCollisions = true;
+          };
+          manualCache = pkgs.runCommandLocal "man-cache" { }
+          ''
+            echo "MANDB_MAP ${manualPages}/share/man $out" > man.conf
+            ${pkgs.man-db}/bin/mandb -C man.conf -psc
+          '';
+        in
+        ''
+          # Manual pages paths for NixOS
+          MANPATH_MAP /run/current-system/sw/bin /run/current-system/sw/share/man
+          MANPATH_MAP /run/wrappers/bin          /run/current-system/sw/share/man
+
+          ${optionalString cfg.man.generateCaches ''
+          # Generated manual pages cache for NixOS (immutable)
+          MANDB_MAP /run/current-system/sw/share/man ${manualCache}
+          ''}
+          # Manual pages caches for NixOS
+          MANDB_MAP /run/current-system/sw/share/man /var/cache/man/nixos
+        '';
     })
 
     (mkIf cfg.info.enable {
diff --git a/nixpkgs/nixos/modules/misc/ids.nix b/nixpkgs/nixos/modules/misc/ids.nix
index 4af62b49c917..ac9782906e1f 100644
--- a/nixpkgs/nixos/modules/misc/ids.nix
+++ b/nixpkgs/nixos/modules/misc/ids.nix
@@ -184,7 +184,7 @@ in
       consul = 145;
       mailpile = 146;
       redmine = 147;
-      seeks = 148;
+      #seeks = 148; # removed 2020-06-21
       prosody = 149;
       i2pd = 150;
       systemd-network = 152;
@@ -198,7 +198,7 @@ in
       bosun = 161;
       kubernetes = 162;
       peerflix = 163;
-      chronos = 164;
+      #chronos = 164; # removed 2020-08-15
       gitlab = 165;
       tox-bootstrapd = 166;
       cadvisor = 167;
@@ -247,7 +247,7 @@ in
       bepasty = 215;
       # pumpio = 216; # unused, removed 2018-02-24
       nm-openvpn = 217;
-      mathics = 218;
+      # mathics = 218; # unused, removed 2020-08-15
       ejabberd = 219;
       postsrsd = 220;
       opendkim = 221;
@@ -321,7 +321,7 @@ in
       monetdb = 290;
       restic = 291;
       openvpn = 292;
-      meguca = 293;
+      # meguca = 293; # removed 2020-08-21
       yarn = 294;
       hdfs = 295;
       mapred = 296;
@@ -345,6 +345,8 @@ in
       zoneminder = 314;
       paperless = 315;
       #mailman = 316;  # removed 2019-08-30
+      zigbee2mqtt = 317;
+      # shadow = 318; # unused
 
       # When adding a uid, make sure it doesn't match an existing gid. And don't use uids above 399!
 
@@ -496,7 +498,7 @@ in
       #consul = 145; # unused
       mailpile = 146;
       redmine = 147;
-      seeks = 148;
+      #seeks = 148; # removed 2020-06-21
       prosody = 149;
       i2pd = 150;
       systemd-network = 152;
@@ -621,7 +623,7 @@ in
       monetdb = 290;
       restic = 291;
       openvpn = 292;
-      meguca = 293;
+      # meguca = 293; # removed 2020-08-21
       yarn = 294;
       hdfs = 295;
       mapred = 296;
@@ -645,6 +647,8 @@ in
       zoneminder = 314;
       paperless = 315;
       #mailman = 316;  # removed 2019-08-30
+      zigbee2mqtt = 317;
+      shadow = 318;
 
       # When adding a gid, make sure it doesn't match an existing
       # uid. Users and groups with the same name should have equal
diff --git a/nixpkgs/nixos/modules/misc/locate.nix b/nixpkgs/nixos/modules/misc/locate.nix
index dc668796c788..92aa3be0a366 100644
--- a/nixpkgs/nixos/modules/misc/locate.nix
+++ b/nixpkgs/nixos/modules/misc/locate.nix
@@ -127,7 +127,7 @@ in {
       { LOCATE_PATH = cfg.output;
       };
 
-    warnings = optional (isMLocate && cfg.localuser != null) "mlocate does not support searching as user other than root"
+    warnings = optional (isMLocate && cfg.localuser != null) "mlocate does not support the services.locate.localuser option; updatedb will run as root. (Silence with services.locate.localuser = null.)"
             ++ optional (isFindutils && cfg.pruneNames != []) "findutils locate does not support pruning by directory component"
             ++ optional (isFindutils && cfg.pruneBindMounts) "findutils locate does not support skipping bind mounts";
 
diff --git a/nixpkgs/nixos/modules/misc/nixpkgs.nix b/nixpkgs/nixos/modules/misc/nixpkgs.nix
index 4f5a9250eaae..25ac94b8e0f6 100644
--- a/nixpkgs/nixos/modules/misc/nixpkgs.nix
+++ b/nixpkgs/nixos/modules/misc/nixpkgs.nix
@@ -178,8 +178,6 @@ in
       type = types.nullOr types.attrs; # TODO utilize lib.systems.parsedPlatform
       default = null;
       example = { system = "aarch64-linux"; config = "aarch64-unknown-linux-gnu"; };
-      defaultText = literalExample
-        ''(import "''${nixos}/../lib").lib.systems.examples.aarch64-multiplatform'';
       description = ''
         Specifies the platform for which NixOS should be
         built. Specify this only if it is different from
diff --git a/nixpkgs/nixos/modules/module-list.nix b/nixpkgs/nixos/modules/module-list.nix
index a9560291f2c1..e7a375d69b09 100644
--- a/nixpkgs/nixos/modules/module-list.nix
+++ b/nixpkgs/nixos/modules/module-list.nix
@@ -1,7 +1,6 @@
 [
   ./config/debug-info.nix
   ./config/fonts/fontconfig.nix
-  ./config/fonts/fontconfig-penultimate.nix
   ./config/fonts/fontdir.nix
   ./config/fonts/fonts.nix
   ./config/fonts/ghostscript.nix
@@ -61,6 +60,7 @@
   ./hardware/printers.nix
   ./hardware/raid/hpsa.nix
   ./hardware/steam-hardware.nix
+  ./hardware/system-76.nix
   ./hardware/tuxedo-keyboard.nix
   ./hardware/usb-wwan.nix
   ./hardware/onlykey.nix
@@ -72,9 +72,11 @@
   ./hardware/video/capture/mwprocapture.nix
   ./hardware/video/bumblebee.nix
   ./hardware/video/displaylink.nix
+  ./hardware/video/hidpi.nix
   ./hardware/video/nvidia.nix
   ./hardware/video/uvcvideo/default.nix
   ./hardware/video/webcam/facetimehd.nix
+  ./hardware/xpadneo.nix
   ./i18n/input-method/default.nix
   ./i18n/input-method/fcitx.nix
   ./i18n/input-method/ibus.nix
@@ -154,6 +156,7 @@
   ./programs/ssmtp.nix
   ./programs/sysdig.nix
   ./programs/systemtap.nix
+  ./programs/steam.nix
   ./programs/sway.nix
   ./programs/system-config-printer.nix
   ./programs/thefuck.nix
@@ -260,6 +263,7 @@
   ./services/continuous-integration/buildbot/worker.nix
   ./services/continuous-integration/buildkite-agents.nix
   ./services/continuous-integration/hail.nix
+  ./services/continuous-integration/hercules-ci-agent/default.nix
   ./services/continuous-integration/hydra/default.nix
   ./services/continuous-integration/gitlab-runner.nix
   ./services/continuous-integration/gocd-agent/default.nix
@@ -294,10 +298,10 @@
   ./services/desktops/accountsservice.nix
   ./services/desktops/bamf.nix
   ./services/desktops/blueman.nix
-  ./services/desktops/deepin/deepin.nix
   ./services/desktops/dleyna-renderer.nix
   ./services/desktops/dleyna-server.nix
   ./services/desktops/pantheon/files.nix
+  ./services/desktops/espanso.nix
   ./services/desktops/flatpak.nix
   ./services/desktops/geoclue2.nix
   ./services/desktops/gsignond.nix
@@ -328,6 +332,7 @@
   ./services/development/bloop.nix
   ./services/development/hoogle.nix
   ./services/development/jupyter/default.nix
+  ./services/development/jupyterhub/default.nix
   ./services/development/lorri.nix
   ./services/editors/emacs.nix
   ./services/editors/infinoted.nix
@@ -464,14 +469,11 @@
   ./services/misc/leaps.nix
   ./services/misc/lidarr.nix
   ./services/misc/mame.nix
-  ./services/misc/mathics.nix
   ./services/misc/matrix-appservice-discord.nix
   ./services/misc/matrix-synapse.nix
   ./services/misc/mautrix-telegram.nix
   ./services/misc/mbpfan.nix
   ./services/misc/mediatomb.nix
-  ./services/misc/mesos-master.nix
-  ./services/misc/mesos-slave.nix
   ./services/misc/metabase.nix
   ./services/misc/mwlib.nix
   ./services/misc/nix-daemon.nix
@@ -487,6 +489,7 @@
   ./services/misc/parsoid.nix
   ./services/misc/plex.nix
   ./services/misc/tautulli.nix
+  ./services/misc/pinnwand.nix
   ./services/misc/pykms.nix
   ./services/misc/radarr.nix
   ./services/misc/redmine.nix
@@ -512,6 +515,7 @@
   ./services/misc/uhub.nix
   ./services/misc/weechat.nix
   ./services/misc/xmr-stak.nix
+  ./services/misc/zigbee2mqtt.nix
   ./services/misc/zoneminder.nix
   ./services/misc/zookeeper.nix
   ./services/monitoring/alerta.nix
@@ -553,6 +557,7 @@
   ./services/monitoring/telegraf.nix
   ./services/monitoring/thanos.nix
   ./services/monitoring/tuptime.nix
+  ./services/monitoring/unifi-poller.nix
   ./services/monitoring/ups.nix
   ./services/monitoring/uptime.nix
   ./services/monitoring/vnstat.nix
@@ -586,11 +591,13 @@
   ./services/networking/atftpd.nix
   ./services/networking/avahi-daemon.nix
   ./services/networking/babeld.nix
+  ./services/networking/biboumi.nix
   ./services/networking/bind.nix
   ./services/networking/bitcoind.nix
   ./services/networking/autossh.nix
   ./services/networking/bird.nix
   ./services/networking/bitlbee.nix
+  ./services/networking/blockbook-frontend.nix
   ./services/networking/charybdis.nix
   ./services/networking/cjdns.nix
   ./services/networking/cntlm.nix
@@ -608,6 +615,7 @@
   ./services/networking/dnscrypt-wrapper.nix
   ./services/networking/dnsdist.nix
   ./services/networking/dnsmasq.nix
+  ./services/networking/ncdns.nix
   ./services/networking/ejabberd.nix
   ./services/networking/epmd.nix
   ./services/networking/ergo.nix
@@ -632,7 +640,6 @@
   ./services/networking/gvpe.nix
   ./services/networking/hans.nix
   ./services/networking/haproxy.nix
-  ./services/networking/heyefi.nix
   ./services/networking/hostapd.nix
   ./services/networking/htpdate.nix
   ./services/networking/hylafax/default.nix
@@ -642,6 +649,8 @@
   ./services/networking/iperf3.nix
   ./services/networking/ircd-hybrid/default.nix
   ./services/networking/iwd.nix
+  ./services/networking/jicofo.nix
+  ./services/networking/jitsi-videobridge.nix
   ./services/networking/keepalived/default.nix
   ./services/networking/keybase.nix
   ./services/networking/kippo.nix
@@ -670,6 +679,7 @@
   ./services/networking/nat.nix
   ./services/networking/ndppd.nix
   ./services/networking/networkmanager.nix
+  ./services/networking/nextdns.nix
   ./services/networking/nftables.nix
   ./services/networking/ngircd.nix
   ./services/networking/nghttpx/default.nix
@@ -687,6 +697,7 @@
   ./services/networking/ocserv.nix
   ./services/networking/ofono.nix
   ./services/networking/oidentd.nix
+  ./services/networking/onedrive.nix
   ./services/networking/openfire.nix
   ./services/networking/openvpn.nix
   ./services/networking/ostinato.nix
@@ -711,11 +722,11 @@
   ./services/networking/rdnssd.nix
   ./services/networking/redsocks.nix
   ./services/networking/resilio.nix
+  ./services/networking/robustirc-bridge.nix
   ./services/networking/rpcbind.nix
   ./services/networking/rxe.nix
   ./services/networking/sabnzbd.nix
   ./services/networking/searx.nix
-  ./services/networking/seeks.nix
   ./services/networking/skydns.nix
   ./services/networking/shadowsocks.nix
   ./services/networking/shairport-sync.nix
@@ -759,6 +770,7 @@
   ./services/networking/v2ray.nix
   ./services/networking/vsftpd.nix
   ./services/networking/wakeonlan.nix
+  ./services/networking/wasabibackend.nix
   ./services/networking/websockify.nix
   ./services/networking/wg-quick.nix
   ./services/networking/wicd.nix
@@ -775,10 +787,8 @@
   ./services/networking/znc/default.nix
   ./services/printing/cupsd.nix
   ./services/scheduling/atd.nix
-  ./services/scheduling/chronos.nix
   ./services/scheduling/cron.nix
   ./services/scheduling/fcron.nix
-  ./services/scheduling/marathon.nix
   ./services/search/elasticsearch.nix
   ./services/search/elasticsearch-curator.nix
   ./services/search/hound.nix
@@ -809,6 +819,7 @@
   ./services/security/torsocks.nix
   ./services/security/usbguard.nix
   ./services/security/vault.nix
+  ./services/security/yubikey-agent.nix
   ./services/system/cloud-init.nix
   ./services/system/dbus.nix
   ./services/system/earlyoom.nix
@@ -828,10 +839,13 @@
   ./services/ttys/gpm.nix
   ./services/ttys/kmscon.nix
   ./services/wayland/cage.nix
+  ./services/video/epgstation/default.nix
+  ./services/video/mirakurun.nix
   ./services/web-apps/atlassian/confluence.nix
   ./services/web-apps/atlassian/crowd.nix
   ./services/web-apps/atlassian/jira.nix
   ./services/web-apps/codimd.nix
+  ./services/web-apps/convos.nix
   ./services/web-apps/cryptpad.nix
   ./services/web-apps/documize.nix
   ./services/web-apps/dokuwiki.nix
@@ -844,6 +858,7 @@
   ./services/web-apps/icingaweb2/module-monitoring.nix
   ./services/web-apps/ihatemoney
   ./services/web-apps/jirafeau.nix
+  ./services/web-apps/jitsi-meet.nix
   ./services/web-apps/limesurvey.nix
   ./services/web-apps/mattermost.nix
   ./services/web-apps/mediawiki.nix
@@ -856,6 +871,7 @@
   ./services/web-apps/moinmoin.nix
   ./services/web-apps/restya-board.nix
   ./services/web-apps/sogo.nix
+  ./services/web-apps/rss-bridge.nix
   ./services/web-apps/tt-rss.nix
   ./services/web-apps/trac.nix
   ./services/web-apps/trilium.nix
@@ -876,9 +892,9 @@
   ./services/web-servers/lighttpd/collectd.nix
   ./services/web-servers/lighttpd/default.nix
   ./services/web-servers/lighttpd/gitweb.nix
-  ./services/web-servers/meguca.nix
   ./services/web-servers/mighttpd2.nix
   ./services/web-servers/minio.nix
+  ./services/web-servers/molly-brown.nix
   ./services/web-servers/nginx/default.nix
   ./services/web-servers/nginx/gitweb.nix
   ./services/web-servers/phpfpm/default.nix
@@ -913,6 +929,7 @@
   ./services/x11/gdk-pixbuf.nix
   ./services/x11/imwheel.nix
   ./services/x11/redshift.nix
+  ./services/x11/urserver.nix
   ./services/x11/urxvtd.nix
   ./services/x11/window-managers/awesome.nix
   ./services/x11/window-managers/default.nix
@@ -936,6 +953,7 @@
   ./system/boot/grow-partition.nix
   ./system/boot/initrd-network.nix
   ./system/boot/initrd-ssh.nix
+  ./system/boot/initrd-openvpn.nix
   ./system/boot/kernel.nix
   ./system/boot/kexec.nix
   ./system/boot/loader/efi.nix
@@ -1011,6 +1029,7 @@
   ./virtualisation/podman.nix
   ./virtualisation/qemu-guest-agent.nix
   ./virtualisation/railcar.nix
+  ./virtualisation/spice-usb-redirection.nix
   ./virtualisation/virtualbox-guest.nix
   ./virtualisation/virtualbox-host.nix
   ./virtualisation/vmware-guest.nix
diff --git a/nixpkgs/nixos/modules/profiles/base.nix b/nixpkgs/nixos/modules/profiles/base.nix
index 2a2fe119d30c..3b67d628f9fd 100644
--- a/nixpkgs/nixos/modules/profiles/base.nix
+++ b/nixpkgs/nixos/modules/profiles/base.nix
@@ -26,6 +26,7 @@
     pkgs.fuse
     pkgs.fuse3
     pkgs.sshfs-fuse
+    pkgs.rsync
     pkgs.socat
     pkgs.screen
 
diff --git a/nixpkgs/nixos/modules/profiles/demo.nix b/nixpkgs/nixos/modules/profiles/demo.nix
index 18f190071bad..4e8c74deedba 100644
--- a/nixpkgs/nixos/modules/profiles/demo.nix
+++ b/nixpkgs/nixos/modules/profiles/demo.nix
@@ -11,9 +11,11 @@
       uid = 1000;
     };
 
-  services.xserver.displayManager.sddm.autoLogin = {
-    enable = true;
-    relogin = true;
-    user = "demo";
+  services.xserver.displayManager = {
+    autoLogin = {
+      enable = true;
+      user = "demo";
+    };
+    sddm.autoLogin.relogin = true;
   };
 }
diff --git a/nixpkgs/nixos/modules/profiles/hardened.nix b/nixpkgs/nixos/modules/profiles/hardened.nix
index ef8c0d74f062..7bff79e82730 100644
--- a/nixpkgs/nixos/modules/profiles/hardened.nix
+++ b/nixpkgs/nixos/modules/profiles/hardened.nix
@@ -1,7 +1,7 @@
 # A profile with most (vanilla) hardening options enabled by default,
 # potentially at the cost of features and performance.
 
-{ lib, pkgs, ... }:
+{ config, lib, pkgs, ... }:
 
 with lib;
 
@@ -27,6 +27,9 @@ with lib;
 
   security.forcePageTableIsolation = mkDefault true;
 
+  # This is required by podman to run containers in rootless mode.
+  security.unprivilegedUsernsClone = mkDefault config.virtualisation.containers.enable;
+
   security.virtualisation.flushL1DataCache = mkDefault "always";
 
   security.apparmor.enable = mkDefault true;
diff --git a/nixpkgs/nixos/modules/profiles/installation-device.nix b/nixpkgs/nixos/modules/profiles/installation-device.nix
index d05c0c50e82c..e68ea1b08776 100644
--- a/nixpkgs/nixos/modules/profiles/installation-device.nix
+++ b/nixpkgs/nixos/modules/profiles/installation-device.nix
@@ -51,22 +51,23 @@ with lib;
     services.mingetty.helpLine = ''
       The "nixos" and "root" accounts have empty passwords.
 
-      Type `sudo systemctl start sshd` to start the SSH daemon.
-      You then must set a password for either "root" or "nixos"
-      with `passwd` to be able to login.
+      An ssh daemon is running. You then must set a password
+      for either "root" or "nixos" with `passwd` or add an ssh key
+      to /home/nixos/.ssh/authorized_keys be able to login.
     '' + optionalString config.services.xserver.enable ''
       Type `sudo systemctl start display-manager' to
       start the graphical user interface.
     '';
 
-    # Allow sshd to be started manually through "systemctl start sshd".
+    # We run sshd by default. Login via root is only possible after adding a
+    # password via "passwd" or by adding a ssh key to /home/nixos/.ssh/authorized_keys.
+    # The latter one is particular useful if keys are manually added to
+    # installation device for head-less systems i.e. arm boards by manually
+    # mounting the storage in a different system.
     services.openssh = {
       enable = true;
-      # Allow password login to the installation, if the user sets a password via "passwd"
-      # It is safe as root doesn't have a password by default and SSH is disabled by default
       permitRootLogin = "yes";
     };
-    systemd.services.sshd.wantedBy = mkOverride 50 [];
 
     # Enable wpa_supplicant, but don't start it by default.
     networking.wireless.enable = mkDefault true;
diff --git a/nixpkgs/nixos/modules/programs/autojump.nix b/nixpkgs/nixos/modules/programs/autojump.nix
index 3a8feec4bb45..ecfc2f658079 100644
--- a/nixpkgs/nixos/modules/programs/autojump.nix
+++ b/nixpkgs/nixos/modules/programs/autojump.nix
@@ -18,7 +18,7 @@ in
         '';
       };
     };
-  }; 
+  };
 
   ###### implementation
 
@@ -26,7 +26,7 @@ in
     environment.pathsToLink = [ "/share/autojump" ];
     environment.systemPackages = [ pkgs.autojump ];
 
-    programs.bash.interactiveShellInit = "source ${pkgs.autojump}/share/autojump/autojump.bash"; 
+    programs.bash.interactiveShellInit = "source ${pkgs.autojump}/share/autojump/autojump.bash";
     programs.zsh.interactiveShellInit = mkIf prg.zsh.enable "source ${pkgs.autojump}/share/autojump/autojump.zsh";
     programs.fish.interactiveShellInit = mkIf prg.fish.enable "source ${pkgs.autojump}/share/autojump/autojump.fish";
   };
diff --git a/nixpkgs/nixos/modules/programs/ccache.nix b/nixpkgs/nixos/modules/programs/ccache.nix
index 874774c72b47..3c9e64932f16 100644
--- a/nixpkgs/nixos/modules/programs/ccache.nix
+++ b/nixpkgs/nixos/modules/programs/ccache.nix
@@ -80,4 +80,4 @@ in {
       ];
     })
   ];
-}
\ No newline at end of file
+}
diff --git a/nixpkgs/nixos/modules/programs/dconf.nix b/nixpkgs/nixos/modules/programs/dconf.nix
index 6702e8efd1cb..ec85cb9d18c9 100644
--- a/nixpkgs/nixos/modules/programs/dconf.nix
+++ b/nixpkgs/nixos/modules/programs/dconf.nix
@@ -4,13 +4,24 @@ with lib;
 
 let
   cfg = config.programs.dconf;
-
-  mkDconfProfile = name: path:
-    {
-      name = "dconf/profile/${name}";
-      value.source = path; 
-    };
-
+  cfgDir = pkgs.symlinkJoin {
+    name = "dconf-system-config";
+    paths = map (x: "${x}/etc/dconf") cfg.packages;
+    postBuild = ''
+      mkdir -p $out/profile
+      mkdir -p $out/db
+    '' + (
+      concatStringsSep "\n" (
+        mapAttrsToList (
+          name: path: ''
+            ln -s ${path} $out/profile/${name}
+          ''
+        ) cfg.profiles
+      )
+    ) + ''
+      ${pkgs.dconf}/bin/dconf update $out/db
+    '';
+  };
 in
 {
   ###### interface
@@ -22,18 +33,24 @@ in
       profiles = mkOption {
         type = types.attrsOf types.path;
         default = {};
-        description = "Set of dconf profile files.";
+        description = "Set of dconf profile files, installed at <filename>/etc/dconf/profiles/<replaceable>name</replaceable></filename>.";
         internal = true;
       };
 
+      packages = mkOption {
+        type = types.listOf types.package;
+        default = [];
+        description = "A list of packages which provide dconf profiles and databases in <filename>/etc/dconf</filename>.";
+      };
     };
   };
 
   ###### implementation
 
   config = mkIf (cfg.profiles != {} || cfg.enable) {
-    environment.etc = optionalAttrs (cfg.profiles != {})
-      (mapAttrs' mkDconfProfile cfg.profiles);
+    environment.etc.dconf = mkIf (cfg.profiles != {} || cfg.packages != []) {
+      source = cfgDir;
+    };
 
     services.dbus.packages = [ pkgs.dconf ];
 
diff --git a/nixpkgs/nixos/modules/programs/environment.nix b/nixpkgs/nixos/modules/programs/environment.nix
index 38bdabb4fa81..8877356360a5 100644
--- a/nixpkgs/nixos/modules/programs/environment.nix
+++ b/nixpkgs/nixos/modules/programs/environment.nix
@@ -33,7 +33,6 @@ in
       { PATH = [ "/bin" ];
         INFOPATH = [ "/info" "/share/info" ];
         KDEDIRS = [ "" ];
-        STRIGI_PLUGIN_PATH = [ "/lib/strigi/" ];
         QT_PLUGIN_PATH = [ "/lib/qt4/plugins" "/lib/kde4/plugins" ];
         QTWEBKIT_PLUGIN_PATH = [ "/lib/mozilla/plugins/" ];
         GTK_PATH = [ "/lib/gtk-2.0" "/lib/gtk-3.0" ];
diff --git a/nixpkgs/nixos/modules/programs/fish.nix b/nixpkgs/nixos/modules/programs/fish.nix
index 48b324a0fe83..39b92edf2ac2 100644
--- a/nixpkgs/nixos/modules/programs/fish.nix
+++ b/nixpkgs/nixos/modules/programs/fish.nix
@@ -102,6 +102,9 @@ in
 
     programs.fish.shellAliases = mapAttrs (name: mkDefault) cfge.shellAliases;
 
+    # Required for man completions
+    documentation.man.generateCaches = true;
+
     environment.etc."fish/foreign-env/shellInit".text = cfge.shellInit;
     environment.etc."fish/foreign-env/loginShellInit".text = cfge.loginShellInit;
     environment.etc."fish/foreign-env/interactiveShellInit".text = cfge.interactiveShellInit;
diff --git a/nixpkgs/nixos/modules/programs/freetds.nix b/nixpkgs/nixos/modules/programs/freetds.nix
index e0860a242b74..b4b657e391bf 100644
--- a/nixpkgs/nixos/modules/programs/freetds.nix
+++ b/nixpkgs/nixos/modules/programs/freetds.nix
@@ -25,7 +25,7 @@ in
           ''';
         }
       '';
-      description = 
+      description =
         ''
         Configure freetds database entries. Each attribute denotes
         a section within freetds.conf, and the value (a string) is the config
@@ -47,7 +47,7 @@ in
     environment.variables.FREETDS = "/etc/freetds.conf";
     environment.variables.SYBASE = "${pkgs.freetds}";
 
-    environment.etc."freetds.conf" = { text = 
+    environment.etc."freetds.conf" = { text =
       (concatStrings (mapAttrsToList (name: value:
         ''
         [${name}]
diff --git a/nixpkgs/nixos/modules/programs/gnupg.nix b/nixpkgs/nixos/modules/programs/gnupg.nix
index 7a3cb588ee71..ce8799b21d69 100644
--- a/nixpkgs/nixos/modules/programs/gnupg.nix
+++ b/nixpkgs/nixos/modules/programs/gnupg.nix
@@ -70,6 +70,7 @@ in
     agent.pinentryFlavor = mkOption {
       type = types.nullOr (types.enum pkgs.pinentry.flavors);
       example = "gnome3";
+      default = defaultPinentryFlavor;
       description = ''
         Which pinentry interface to use. If not null, the path to the
         pinentry binary will be passed to gpg-agent via commandline and
@@ -91,8 +92,6 @@ in
   };
 
   config = mkIf cfg.agent.enable {
-    programs.gnupg.agent.pinentryFlavor = mkDefault defaultPinentryFlavor;
-
     # This overrides the systemd user unit shipped with the gnupg package
     systemd.user.services.gpg-agent = mkIf (cfg.agent.pinentryFlavor != null) {
       serviceConfig.ExecStart = [ "" ''
diff --git a/nixpkgs/nixos/modules/programs/gpaste.nix b/nixpkgs/nixos/modules/programs/gpaste.nix
index 4f6deb77e5eb..8bc52c28d814 100644
--- a/nixpkgs/nixos/modules/programs/gpaste.nix
+++ b/nixpkgs/nixos/modules/programs/gpaste.nix
@@ -30,5 +30,7 @@ with lib;
     environment.systemPackages = [ pkgs.gnome3.gpaste ];
     services.dbus.packages = [ pkgs.gnome3.gpaste ];
     systemd.packages = [ pkgs.gnome3.gpaste ];
+    # gnome-control-center crashes in Keyboard Shortcuts pane without the GSettings schemas.
+    services.xserver.desktopManager.gnome3.sessionPath = [ pkgs.gnome3.gpaste ];
   };
 }
diff --git a/nixpkgs/nixos/modules/programs/nm-applet.nix b/nixpkgs/nixos/modules/programs/nm-applet.nix
index 273a6dec59a5..5bcee30125bb 100644
--- a/nixpkgs/nixos/modules/programs/nm-applet.nix
+++ b/nixpkgs/nixos/modules/programs/nm-applet.nix
@@ -5,14 +5,25 @@
     maintainers = lib.teams.freedesktop.members;
   };
 
-  options.programs.nm-applet.enable = lib.mkEnableOption "nm-applet";
+  options.programs.nm-applet = {
+    enable = lib.mkEnableOption "nm-applet";
+
+    indicator = lib.mkOption {
+      type = lib.types.bool;
+      default = true;
+      description = ''
+        Whether to use indicator instead of status icon.
+        It is needed for Appindicator environments, like Enlightenment.
+      '';
+    };
+  };
 
   config = lib.mkIf config.programs.nm-applet.enable {
     systemd.user.services.nm-applet = {
       description = "Network manager applet";
       wantedBy = [ "graphical-session.target" ];
       partOf = [ "graphical-session.target" ];
-      serviceConfig.ExecStart = "${pkgs.networkmanagerapplet}/bin/nm-applet";
+      serviceConfig.ExecStart = "${pkgs.networkmanagerapplet}/bin/nm-applet ${lib.optionalString config.programs.nm-applet.indicator "--indicator"}";
     };
 
     services.dbus.packages = [ pkgs.gcr ];
diff --git a/nixpkgs/nixos/modules/programs/qt5ct.nix b/nixpkgs/nixos/modules/programs/qt5ct.nix
index aeb7fc508495..3f2bcf622836 100644
--- a/nixpkgs/nixos/modules/programs/qt5ct.nix
+++ b/nixpkgs/nixos/modules/programs/qt5ct.nix
@@ -26,6 +26,6 @@ with lib;
   ###### implementation
   config = mkIf config.programs.qt5ct.enable {
     environment.variables.QT_QPA_PLATFORMTHEME = "qt5ct";
-    environment.systemPackages = with pkgs; [ qt5ct libsForQt5.qtstyleplugins ];
+    environment.systemPackages = with pkgs; [ qt5ct ];
   };
 }
diff --git a/nixpkgs/nixos/modules/programs/ssh.nix b/nixpkgs/nixos/modules/programs/ssh.nix
index a983ffa4b890..40af4d0ff5ae 100644
--- a/nixpkgs/nixos/modules/programs/ssh.nix
+++ b/nixpkgs/nixos/modules/programs/ssh.nix
@@ -131,7 +131,7 @@ in
 
       knownHosts = mkOption {
         default = {};
-        type = types.loaOf (types.submodule ({ name, ... }: {
+        type = types.attrsOf (types.submodule ({ name, ... }: {
           options = {
             certAuthority = mkOption {
               type = types.bool;
diff --git a/nixpkgs/nixos/modules/programs/steam.nix b/nixpkgs/nixos/modules/programs/steam.nix
new file mode 100644
index 000000000000..3c919c47a0c6
--- /dev/null
+++ b/nixpkgs/nixos/modules/programs/steam.nix
@@ -0,0 +1,25 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.programs.steam;
+in {
+  options.programs.steam.enable = mkEnableOption "steam";
+
+  config = mkIf cfg.enable {
+    hardware.opengl = { # this fixes the "glXChooseVisual failed" bug, context: https://github.com/NixOS/nixpkgs/issues/47932
+      enable = true;
+      driSupport32Bit = true;
+    };
+
+    # optionally enable 32bit pulseaudio support if pulseaudio is enabled
+    hardware.pulseaudio.support32Bit = config.hardware.pulseaudio.enable;
+
+    hardware.steam-hardware.enable = true;
+
+    environment.systemPackages = [ pkgs.steam ];
+  };
+
+  meta.maintainers = with maintainers; [ mkg20001 ];
+}
diff --git a/nixpkgs/nixos/modules/programs/tsm-client.nix b/nixpkgs/nixos/modules/programs/tsm-client.nix
index eb6f12475286..7ac4086d5f09 100644
--- a/nixpkgs/nixos/modules/programs/tsm-client.nix
+++ b/nixpkgs/nixos/modules/programs/tsm-client.nix
@@ -7,7 +7,7 @@ let
   inherit (lib.modules) mkDefault mkIf;
   inherit (lib.options) literalExample mkEnableOption mkOption;
   inherit (lib.strings) concatStringsSep optionalString toLower;
-  inherit (lib.types) addCheck attrsOf lines loaOf nullOr package path port str strMatching submodule;
+  inherit (lib.types) addCheck attrsOf lines nullOr package path port str strMatching submodule;
 
   # Checks if given list of strings contains unique
   # elements when compared without considering case.
@@ -178,7 +178,7 @@ let
       client system-options file "dsm.sys"
     '';
     servers = mkOption {
-      type = loaOf (submodule [ serverOptions ]);
+      type = attrsOf (submodule [ serverOptions ]);
       default = {};
       example.mainTsmServer = {
         server = "tsmserver.company.com";
diff --git a/nixpkgs/nixos/modules/programs/xss-lock.nix b/nixpkgs/nixos/modules/programs/xss-lock.nix
index a7ad9b89db4d..83ed71386407 100644
--- a/nixpkgs/nixos/modules/programs/xss-lock.nix
+++ b/nixpkgs/nixos/modules/programs/xss-lock.nix
@@ -34,7 +34,7 @@ in
       partOf = [ "graphical-session.target" ];
       serviceConfig.ExecStart = with lib;
         strings.concatStringsSep " " ([
-            "${pkgs.xss-lock}/bin/xss-lock"
+            "${pkgs.xss-lock}/bin/xss-lock" "--session \${XDG_SESSION_ID}"
           ] ++ (map escapeShellArg cfg.extraOptions) ++ [
             "--"
             cfg.lockerCommand
diff --git a/nixpkgs/nixos/modules/programs/zsh/oh-my-zsh.xml b/nixpkgs/nixos/modules/programs/zsh/oh-my-zsh.xml
index 568c2de65576..14a7228ad9b0 100644
--- a/nixpkgs/nixos/modules/programs/zsh/oh-my-zsh.xml
+++ b/nixpkgs/nixos/modules/programs/zsh/oh-my-zsh.xml
@@ -73,7 +73,7 @@
 <programlisting>
 { pkgs, ... }:
 {
-  programs.zsh.ohMyZsh.customPkgs = with pkgs; [
+  programs.zsh.ohMyZsh.customPkgs = [
     pkgs.nix-zsh-completions
     # and even more...
   ];
diff --git a/nixpkgs/nixos/modules/rename.nix b/nixpkgs/nixos/modules/rename.nix
index 1dc7f8533176..a87db475e012 100644
--- a/nixpkgs/nixos/modules/rename.nix
+++ b/nixpkgs/nixos/modules/rename.nix
@@ -17,8 +17,13 @@ with lib;
     (mkAliasOptionModule [ "environment" "checkConfigurationOptions" ] [ "_module" "check" ])
 
     # Completely removed modules
+    (mkRemovedOptionModule [ "fonts" "fontconfig" "penultimate" ] "The corresponding package has removed from nixpkgs.")
+    (mkRemovedOptionModule [ "services" "chronos" ] "The corresponding package was removed from nixpkgs.")
+    (mkRemovedOptionModule [ "services" "deepin" ] "The corresponding packages were removed from nixpkgs.")
     (mkRemovedOptionModule [ "services" "firefox" "syncserver" "user" ] "")
     (mkRemovedOptionModule [ "services" "firefox" "syncserver" "group" ] "")
+    (mkRemovedOptionModule [ "services" "marathon" ] "The corresponding package was removed from nixpkgs.")
+    (mkRemovedOptionModule [ "services" "mesos" ] "The corresponding package was removed from nixpkgs.")
     (mkRemovedOptionModule [ "services" "winstone" ] "The corresponding package was removed from nixpkgs.")
     (mkRemovedOptionModule [ "networking" "vpnc" ] "Use environment.etc.\"vpnc/service.conf\" instead.")
     (mkRemovedOptionModule [ "environment" "blcr" "enable" ] "The BLCR module has been removed")
@@ -28,6 +33,7 @@ with lib;
     (mkRemovedOptionModule [ "services" "osquery" ] "The osquery module has been removed")
     (mkRemovedOptionModule [ "services" "fourStore" ] "The fourStore module has been removed")
     (mkRemovedOptionModule [ "services" "fourStoreEndpoint" ] "The fourStoreEndpoint module has been removed")
+    (mkRemovedOptionModule [ "services" "mathics" ] "The Mathics module has been removed")
     (mkRemovedOptionModule [ "programs" "way-cooler" ] ("way-cooler is abandoned by its author: " +
       "https://way-cooler.org/blog/2020/01/09/way-cooler-post-mortem.html"))
     (mkRemovedOptionModule [ "services" "xserver" "multitouch" ] ''
@@ -39,10 +45,11 @@ with lib;
       The services.xserver.displayManager.auto module has been removed
       because it was only intended for use in internal NixOS tests, and gave the
       false impression of it being a special display manager when it's actually
-      LightDM. Please use the services.xserver.displayManager.lightdm.autoLogin options
+      LightDM. Please use the services.xserver.displayManager.autoLogin options
       instead, or any other display manager in NixOS as they all support auto-login.
     '')
     (mkRemovedOptionModule [ "services" "dnscrypt-proxy" ] "Use services.dnscrypt-proxy2 instead")
+    (mkRemovedOptionModule [ "services" "meguca" ] "Use meguca has been removed from nixpkgs")
     (mkRemovedOptionModule ["hardware" "brightnessctl" ] ''
       The brightnessctl module was removed because newer versions of
       brightnessctl don't require the udev rules anymore (they can use the
@@ -61,6 +68,8 @@ with lib;
       to handle FIDO security tokens, so this isn't necessary anymore.
     '')
 
+    (mkRemovedOptionModule [ "services" "seeks" ] "")
+
     # Do NOT add any option renames here, see top of the file
   ];
 }
diff --git a/nixpkgs/nixos/modules/security/acme.nix b/nixpkgs/nixos/modules/security/acme.nix
index 06e5c0ede297..8e67d4ff8716 100644
--- a/nixpkgs/nixos/modules/security/acme.nix
+++ b/nixpkgs/nixos/modules/security/acme.nix
@@ -1,11 +1,314 @@
-{ config, lib, pkgs, ... }:
+{ config, lib, pkgs, options, ... }:
 with lib;
 let
-
   cfg = config.security.acme;
 
+  # Used to calculate timer accuracy for coalescing
+  numCerts = length (builtins.attrNames cfg.certs);
+  _24hSecs = 60 * 60 * 24;
+
+  # There are many services required to make cert renewals work.
+  # They all follow a common structure:
+  #   - They inherit this commonServiceConfig
+  #   - They all run as the acme user
+  #   - They all use BindPath and StateDirectory where possible
+  #     to set up a sort of build environment in /tmp
+  # The Group can vary depending on what the user has specified in
+  # security.acme.certs.<cert>.group on some of the services.
+  commonServiceConfig = {
+      Type = "oneshot";
+      User = "acme";
+      Group = mkDefault "acme";
+      UMask = 0027;
+      StateDirectoryMode = 750;
+      ProtectSystem = "full";
+      PrivateTmp = true;
+
+      WorkingDirectory = "/tmp";
+  };
+
+  # In order to avoid race conditions creating the CA for selfsigned certs,
+  # we have a separate service which will create the necessary files.
+  selfsignCAService = {
+    description = "Generate self-signed certificate authority";
+
+    path = with pkgs; [ minica ];
+
+    unitConfig = {
+      ConditionPathExists = "!/var/lib/acme/.minica/key.pem";
+    };
+
+    serviceConfig = commonServiceConfig // {
+      StateDirectory = "acme/.minica";
+      BindPaths = "/var/lib/acme/.minica:/tmp/ca";
+    };
+
+    # Working directory will be /tmp
+    script = ''
+      minica \
+        --ca-key ca/key.pem \
+        --ca-cert ca/cert.pem \
+        --domains selfsigned.local
+
+      chmod 600 ca/*
+    '';
+  };
+
+  # Previously, all certs were owned by whatever user was configured in
+  # config.security.acme.certs.<cert>.user. Now everything is owned by and
+  # run by the acme user.
+  userMigrationService = {
+    description = "Fix owner and group of all ACME certificates";
+
+    script = with builtins; concatStringsSep "\n" (mapAttrsToList (cert: data: ''
+      for fixpath in /var/lib/acme/${escapeShellArg cert} /var/lib/acme/.lego/${escapeShellArg cert}; do
+        if [ -d "$fixpath" ]; then
+          chmod -R 750 "$fixpath"
+          chown -R acme:${data.group} "$fixpath"
+        fi
+      done
+    '') certConfigs);
+
+    # We don't want this to run every time a renewal happens
+    serviceConfig.RemainAfterExit = true;
+  };
+
+  certToConfig = cert: data: let
+    acmeServer = if data.server != null then data.server else cfg.server;
+    useDns = data.dnsProvider != null;
+    destPath = "/var/lib/acme/${cert}";
+    selfsignedDeps = optionals (cfg.preliminarySelfsigned) [ "acme-selfsigned-${cert}.service" ];
+
+    # Minica and lego have a "feature" which replaces * with _. We need
+    # to make this substitution to reference the output files from both programs.
+    # End users never see this since we rename the certs.
+    keyName = builtins.replaceStrings ["*"] ["_"] data.domain;
+
+    # FIXME when mkChangedOptionModule supports submodules, change to that.
+    # This is a workaround
+    extraDomains = data.extraDomainNames ++ (
+      optionals
+      (data.extraDomains != "_mkMergedOptionModule")
+      (builtins.attrNames data.extraDomains)
+    );
+
+    # Create hashes for cert data directories based on configuration
+    # Flags are separated to avoid collisions
+    hashData = with builtins; ''
+      ${concatStringsSep " " data.extraLegoFlags} -
+      ${concatStringsSep " " data.extraLegoRunFlags} -
+      ${concatStringsSep " " data.extraLegoRenewFlags} -
+      ${toString acmeServer} ${toString data.dnsProvider}
+      ${toString data.ocspMustStaple} ${data.keyType}
+    '';
+    mkHash = with builtins; val: substring 0 20 (hashString "sha256" val);
+    certDir = mkHash hashData;
+    domainHash = mkHash "${concatStringsSep " " extraDomains} ${data.domain}";
+    othersHash = mkHash "${toString acmeServer} ${data.keyType}";
+    accountDir = "/var/lib/acme/.lego/accounts/" + othersHash;
+
+    protocolOpts = if useDns then (
+      [ "--dns" data.dnsProvider ]
+      ++ optionals (!data.dnsPropagationCheck) [ "--dns.disable-cp" ]
+    ) else (
+      [ "--http" "--http.webroot" data.webroot ]
+    );
+
+    commonOpts = [
+      "--accept-tos" # Checking the option is covered by the assertions
+      "--path" "."
+      "-d" data.domain
+      "--email" data.email
+      "--key-type" data.keyType
+    ] ++ protocolOpts
+      ++ optionals data.ocspMustStaple [ "--must-staple" ]
+      ++ optionals (acmeServer != null) [ "--server" acmeServer ]
+      ++ concatMap (name: [ "-d" name ]) extraDomains
+      ++ data.extraLegoFlags;
+
+    runOpts = escapeShellArgs (
+      commonOpts
+      ++ [ "run" ]
+      ++ data.extraLegoRunFlags
+    );
+    renewOpts = escapeShellArgs (
+      commonOpts
+      ++ [ "renew" "--reuse-key" ]
+      ++ data.extraLegoRenewFlags
+    );
+
+  in {
+    inherit accountDir selfsignedDeps;
+
+    webroot = data.webroot;
+    group = data.group;
+
+    renewTimer = {
+      description = "Renew ACME Certificate for ${cert}";
+      wantedBy = [ "timers.target" ];
+      timerConfig = {
+        OnCalendar = cfg.renewInterval;
+        Unit = "acme-${cert}.service";
+        Persistent = "yes";
+
+        # Allow systemd to pick a convenient time within the day
+        # to run the check.
+        # This allows the coalescing of multiple timer jobs.
+        # We divide by the number of certificates so that if you
+        # have many certificates, the renewals are distributed over
+        # the course of the day to avoid rate limits.
+        AccuracySec = "${toString (_24hSecs / numCerts)}s";
+
+        # Skew randomly within the day, per https://letsencrypt.org/docs/integration-guide/.
+        RandomizedDelaySec = "24h";
+      };
+    };
+
+    selfsignService = {
+      description = "Generate self-signed certificate for ${cert}";
+      after = [ "acme-selfsigned-ca.service" "acme-fixperms.service" ];
+      requires = [ "acme-selfsigned-ca.service" "acme-fixperms.service" ];
+
+      path = with pkgs; [ minica ];
+
+      unitConfig = {
+        ConditionPathExists = "!/var/lib/acme/${cert}/key.pem";
+      };
+
+      serviceConfig = commonServiceConfig // {
+        Group = data.group;
+
+        StateDirectory = "acme/${cert}";
+
+        BindPaths = "/var/lib/acme/.minica:/tmp/ca /var/lib/acme/${cert}:/tmp/${keyName}";
+      };
+
+      # Working directory will be /tmp
+      # minica will output to a folder sharing the name of the first domain
+      # in the list, which will be ${data.domain}
+      script = ''
+        minica \
+          --ca-key ca/key.pem \
+          --ca-cert ca/cert.pem \
+          --domains ${escapeShellArg (builtins.concatStringsSep "," ([ data.domain ] ++ extraDomains))}
+
+        # Create files to match directory layout for real certificates
+        cd '${keyName}'
+        cp ../ca/cert.pem chain.pem
+        cat cert.pem chain.pem > fullchain.pem
+        cat key.pem fullchain.pem > full.pem
+
+        chmod 640 *
+
+        # Group might change between runs, re-apply it
+        chown 'acme:${data.group}' *
+      '';
+    };
+
+    renewService = {
+      description = "Renew ACME certificate for ${cert}";
+      after = [ "network.target" "network-online.target" "acme-fixperms.service" ] ++ selfsignedDeps;
+      wants = [ "network-online.target" "acme-fixperms.service" ] ++ selfsignedDeps;
+
+      # https://github.com/NixOS/nixpkgs/pull/81371#issuecomment-605526099
+      wantedBy = optionals (!config.boot.isContainer) [ "multi-user.target" ];
+
+      path = with pkgs; [ lego coreutils diffutils ];
+
+      serviceConfig = commonServiceConfig // {
+        Group = data.group;
+
+        # AccountDir dir will be created by tmpfiles to ensure correct permissions
+        # And to avoid deletion during systemctl clean
+        # acme/.lego/${cert} is listed so that it is deleted during systemctl clean
+        StateDirectory = "acme/${cert} acme/.lego/${cert} acme/.lego/${cert}/${certDir}";
+
+        # Needs to be space separated, but can't use a multiline string because that'll include newlines
+        BindPaths =
+          "${accountDir}:/tmp/accounts " +
+          "/var/lib/acme/${cert}:/tmp/out " +
+          "/var/lib/acme/.lego/${cert}/${certDir}:/tmp/certificates ";
+
+        # Only try loading the credentialsFile if the dns challenge is enabled
+        EnvironmentFile = mkIf useDns data.credentialsFile;
+
+        # Run as root (Prefixed with +)
+        ExecStartPost = "+" + (pkgs.writeShellScript "acme-postrun" ''
+          cd /var/lib/acme/${escapeShellArg cert}
+          if [ -e renewed ]; then
+            rm renewed
+            ${data.postRun}
+          fi
+        '');
+      };
+
+      # Working directory will be /tmp
+      script = ''
+        set -euo pipefail
+
+        echo '${domainHash}' > domainhash.txt
+
+        # Check if we can renew
+        if [ -e 'certificates/${keyName}.key' -a -e 'certificates/${keyName}.crt' ]; then
+
+          # When domains are updated, there's no need to do a full
+          # Lego run, but it's likely renew won't work if days is too low.
+          if [ -e certificates/domainhash.txt ] && cmp -s domainhash.txt certificates/domainhash.txt; then
+            lego ${renewOpts} --days ${toString cfg.validMinDays}
+          else
+            # Any number > 90 works, but this one is over 9000 ;-)
+            lego ${renewOpts} --days 9001
+          fi
+
+        # Otherwise do a full run
+        else
+          lego ${runOpts}
+        fi
+
+        mv domainhash.txt certificates/
+        chmod 640 certificates/*
+        chmod -R 700 accounts/*
+
+        # Group might change between runs, re-apply it
+        chown 'acme:${data.group}' certificates/*
+
+        # Copy all certs to the "real" certs directory
+        CERT='certificates/${keyName}.crt'
+        if [ -e "$CERT" ] && ! cmp -s "$CERT" out/fullchain.pem; then
+          touch out/renewed
+          echo Installing new certificate
+          cp -vp 'certificates/${keyName}.crt' out/fullchain.pem
+          cp -vp 'certificates/${keyName}.key' out/key.pem
+          cp -vp 'certificates/${keyName}.issuer.crt' out/chain.pem
+          ln -sf fullchain.pem out/cert.pem
+          cat out/key.pem out/fullchain.pem > out/full.pem
+        fi
+      '';
+    };
+  };
+
+  certConfigs = mapAttrs certToConfig cfg.certs;
+
   certOpts = { name, ... }: {
     options = {
+      # user option has been removed
+      user = mkOption {
+        visible = false;
+        default = "_mkRemovedOptionModule";
+      };
+
+      # allowKeysForGroup option has been removed
+      allowKeysForGroup = mkOption {
+        visible = false;
+        default = "_mkRemovedOptionModule";
+      };
+
+      # extraDomains was replaced with extraDomainNames
+      extraDomains = mkOption {
+        visible = false;
+        default = "_mkMergedOptionModule";
+      };
+
       webroot = mkOption {
         type = types.nullOr types.str;
         default = null;
@@ -23,16 +326,16 @@ let
         type = types.nullOr types.str;
         default = null;
         description = ''
-          ACME Directory Resource URI. Defaults to let's encrypt
+          ACME Directory Resource URI. Defaults to Let's Encrypt's
           production endpoint,
-          https://acme-v02.api.letsencrypt.org/directory, if unset.
+          <link xlink:href="https://acme-v02.api.letsencrypt.org/directory"/>, if unset.
         '';
       };
 
       domain = mkOption {
         type = types.str;
         default = name;
-        description = "Domain to fetch certificate for (defaults to the entry name)";
+        description = "Domain to fetch certificate for (defaults to the entry name).";
       };
 
       email = mkOption {
@@ -41,35 +344,19 @@ let
         description = "Contact email address for the CA to be able to reach you.";
       };
 
-      user = mkOption {
-        type = types.str;
-        default = "root";
-        description = "User running the ACME client.";
-      };
-
       group = mkOption {
         type = types.str;
-        default = "root";
+        default = "acme";
         description = "Group running the ACME client.";
       };
 
-      allowKeysForGroup = mkOption {
-        type = types.bool;
-        default = false;
-        description = ''
-          Give read permissions to the specified group
-          (<option>security.acme.cert.&lt;name&gt;.group</option>) to read SSL private certificates.
-        '';
-      };
-
       postRun = mkOption {
         type = types.lines;
         default = "";
-        example = "systemctl reload nginx.service";
+        example = "cp full.pem backup.pem";
         description = ''
-          Commands to run after new certificates go live. Typically
-          the web server and other servers using certificates need to
-          be reloaded.
+          Commands to run after new certificates go live. Note that
+          these commands run as the root user.
 
           Executed in the same directory with the new certificate.
         '';
@@ -82,18 +369,17 @@ let
         description = "Directory where certificate and other state is stored.";
       };
 
-      extraDomains = mkOption {
-        type = types.attrsOf (types.nullOr types.str);
-        default = {};
+      extraDomainNames = mkOption {
+        type = types.listOf types.str;
+        default = [];
         example = literalExample ''
-          {
-            "example.org" = null;
-            "mydomain.org" = null;
-          }
+          [
+            "example.org"
+            "mydomain.org"
+          ]
         '';
         description = ''
           A list of extra domain names, which are included in the one certificate to be issued.
-          Setting a distinct server root is deprecated and not functional in 20.03+
         '';
       };
 
@@ -103,7 +389,7 @@ let
         description = ''
           Key type to use for private keys.
           For an up to date list of supported values check the --key-type option
-          at https://go-acme.github.io/lego/usage/cli/#usage.
+          at <link xlink:href="https://go-acme.github.io/lego/usage/cli/#usage"/>.
         '';
       };
 
@@ -113,7 +399,7 @@ let
         example = "route53";
         description = ''
           DNS Challenge provider. For a list of supported providers, see the "code"
-          field of the DNS providers listed at https://go-acme.github.io/lego/dns/.
+          field of the DNS providers listed at <link xlink:href="https://go-acme.github.io/lego/dns/"/>.
         '';
       };
 
@@ -123,7 +409,7 @@ let
           Path to an EnvironmentFile for the cert's service containing any required and
           optional environment variables for your selected dnsProvider.
           To find out what values you need to set, consult the documentation at
-          https://go-acme.github.io/lego/dns/ for the corresponding dnsProvider.
+          <link xlink:href="https://go-acme.github.io/lego/dns/"/> for the corresponding dnsProvider.
         '';
         example = "/var/src/secrets/example.org-route53-api-token";
       };
@@ -150,6 +436,14 @@ let
         '';
       };
 
+      extraLegoFlags = mkOption {
+        type = types.listOf types.str;
+        default = [];
+        description = ''
+          Additional global flags to pass to all lego commands.
+        '';
+      };
+
       extraLegoRenewFlags = mkOption {
         type = types.listOf types.str;
         default = [];
@@ -157,27 +451,19 @@ let
           Additional flags to pass to lego renew.
         '';
       };
+
+      extraLegoRunFlags = mkOption {
+        type = types.listOf types.str;
+        default = [];
+        description = ''
+          Additional flags to pass to lego run.
+        '';
+      };
     };
   };
 
-in
+in {
 
-{
-
-  ###### interface
-  imports = [
-    (mkRemovedOptionModule [ "security" "acme" "production" ] ''
-      Use security.acme.server to define your staging ACME server URL instead.
-
-      To use the let's encrypt staging server, use security.acme.server =
-      "https://acme-staging-v02.api.letsencrypt.org/directory".
-    ''
-    )
-    (mkRemovedOptionModule [ "security" "acme" "directory"] "ACME Directory is now hardcoded to /var/lib/acme and its permisisons are managed by systemd. See https://github.com/NixOS/nixpkgs/issues/53852 for more info.")
-    (mkRemovedOptionModule [ "security" "acme" "preDelay"] "This option has been removed. If you want to make sure that something executes before certificates are provisioned, add a RequiredBy=acme-\${cert}.service to the service you want to execute before the cert renewal")
-    (mkRemovedOptionModule [ "security" "acme" "activationDelay"] "This option has been removed. If you want to make sure that something executes before certificates are provisioned, add a RequiredBy=acme-\${cert}.service to the service you want to execute before the cert renewal")
-    (mkChangedOptionModule [ "security" "acme" "validMin"] [ "security" "acme" "validMinDays"] (config: config.security.acme.validMin / (24 * 3600)))
-  ];
   options = {
     security.acme = {
 
@@ -207,9 +493,9 @@ in
         type = types.nullOr types.str;
         default = null;
         description = ''
-          ACME Directory Resource URI. Defaults to let's encrypt
+          ACME Directory Resource URI. Defaults to Let's Encrypt's
           production endpoint,
-          <literal>https://acme-v02.api.letsencrypt.org/directory</literal>, if unset.
+          <link xlink:href="https://acme-v02.api.letsencrypt.org/directory"/>, if unset.
         '';
       };
 
@@ -230,8 +516,8 @@ in
         type = types.bool;
         default = false;
         description = ''
-          Accept the CA's terms of service. The default provier is Let's Encrypt,
-          you can find their ToS at https://letsencrypt.org/repository/
+          Accept the CA's terms of service. The default provider is Let's Encrypt,
+          you can find their ToS at <link xlink:href="https://letsencrypt.org/repository/"/>.
         '';
       };
 
@@ -250,7 +536,7 @@ in
             "example.com" = {
               webroot = "/var/www/challenges/";
               email = "foo@example.com";
-              extraDomains = { "www.example.com" = null; "foo.example.com" = null; };
+              extraDomainNames = [ "www.example.com" "foo.example.com" ];
             };
             "bar.example.com" = {
               webroot = "/var/www/challenges/";
@@ -262,25 +548,40 @@ in
     };
   };
 
-  ###### implementation
+  imports = [
+    (mkRemovedOptionModule [ "security" "acme" "production" ] ''
+      Use security.acme.server to define your staging ACME server URL instead.
+
+      To use the let's encrypt staging server, use security.acme.server =
+      "https://acme-staging-v02.api.letsencrypt.org/directory".
+    ''
+    )
+    (mkRemovedOptionModule [ "security" "acme" "directory" ] "ACME Directory is now hardcoded to /var/lib/acme and its permisisons are managed by systemd. See https://github.com/NixOS/nixpkgs/issues/53852 for more info.")
+    (mkRemovedOptionModule [ "security" "acme" "preDelay" ] "This option has been removed. If you want to make sure that something executes before certificates are provisioned, add a RequiredBy=acme-\${cert}.service to the service you want to execute before the cert renewal")
+    (mkRemovedOptionModule [ "security" "acme" "activationDelay" ] "This option has been removed. If you want to make sure that something executes before certificates are provisioned, add a RequiredBy=acme-\${cert}.service to the service you want to execute before the cert renewal")
+    (mkChangedOptionModule [ "security" "acme" "validMin" ] [ "security" "acme" "validMinDays" ] (config: config.security.acme.validMin / (24 * 3600)))
+  ];
+
   config = mkMerge [
     (mkIf (cfg.certs != { }) {
 
+      # FIXME Most of these custom warnings and filters for security.acme.certs.* are required
+      # because using mkRemovedOptionModule/mkChangedOptionModule with attrsets isn't possible.
+      warnings = filter (w: w != "") (mapAttrsToList (cert: data: if data.extraDomains != "_mkMergedOptionModule" then ''
+        The option definition `security.acme.certs.${cert}.extraDomains` has changed
+        to `security.acme.certs.${cert}.extraDomainNames` and is now a list of strings.
+        Setting a custom webroot for extra domains is not possible, instead use separate certs.
+      '' else "") cfg.certs);
+
       assertions = let
-        certs = (mapAttrsToList (k: v: v) cfg.certs);
+        certs = attrValues cfg.certs;
       in [
         {
-          assertion = all (certOpts: certOpts.dnsProvider == null || certOpts.webroot == null) certs;
-          message = ''
-            Options `security.acme.certs.<name>.dnsProvider` and
-            `security.acme.certs.<name>.webroot` are mutually exclusive.
-          '';
-        }
-        {
           assertion = cfg.email != null || all (certOpts: certOpts.email != null) certs;
           message = ''
             You must define `security.acme.certs.<name>.email` or
-            `security.acme.email` to register with the CA.
+            `security.acme.email` to register with the CA. Note that using
+            many different addresses for certs may trigger account rate limits.
           '';
         }
         {
@@ -291,175 +592,78 @@ in
             to `true`. For Let's Encrypt's ToS see https://letsencrypt.org/repository/
           '';
         }
-      ];
-
-      systemd.services = let
-          services = concatLists servicesLists;
-          servicesLists = mapAttrsToList certToServices cfg.certs;
-          certToServices = cert: data:
-              let
-                # StateDirectory must be relative, and will be created under /var/lib by systemd
-                lpath = "acme/${cert}";
-                apath = "/var/lib/${lpath}";
-                spath = "/var/lib/acme/.lego/${cert}";
-                fileMode = if data.allowKeysForGroup then "640" else "600";
-                globalOpts = [ "-d" data.domain "--email" data.email "--path" "." "--key-type" data.keyType ]
-                          ++ optionals (cfg.acceptTerms) [ "--accept-tos" ]
-                          ++ optionals (data.dnsProvider != null && !data.dnsPropagationCheck) [ "--dns.disable-cp" ]
-                          ++ concatLists (mapAttrsToList (name: root: [ "-d" name ]) data.extraDomains)
-                          ++ (if data.dnsProvider != null then [ "--dns" data.dnsProvider ] else [ "--http" "--http.webroot" data.webroot ])
-                          ++ optionals (cfg.server != null || data.server != null) ["--server" (if data.server == null then cfg.server else data.server)];
-                certOpts = optionals data.ocspMustStaple [ "--must-staple" ];
-                runOpts = escapeShellArgs (globalOpts ++ [ "run" ] ++ certOpts);
-                renewOpts = escapeShellArgs (globalOpts ++
-                  [ "renew" "--days" (toString cfg.validMinDays) ] ++
-                  certOpts ++ data.extraLegoRenewFlags);
-                acmeService = {
-                  description = "Renew ACME Certificate for ${cert}";
-                  after = [ "network.target" "network-online.target" ];
-                  wants = [ "network-online.target" ];
-                  wantedBy = mkIf (!config.boot.isContainer) [ "multi-user.target" ];
-                  preStart = optionalString data.allowKeysForGroup ''
-                    exec find ${spath}/accounts \
-                        -type f \! -perm 640 -exec chmod 640 '{}' \; , \
-                        -type d \! -perm 750 -exec chmod 750 '{}' \;
-                  '';
-                  serviceConfig = {
-                    Type = "oneshot";
-                    User = data.user;
-                    Group = data.group;
-                    PrivateTmp = true;
-                    StateDirectory = "acme/.lego/${cert} acme/.lego/accounts ${lpath}";
-                    StateDirectoryMode = if data.allowKeysForGroup then "750" else "700";
-                    WorkingDirectory = spath;
-                    # Only try loading the credentialsFile if the dns challenge is enabled
-                    EnvironmentFile = if data.dnsProvider != null then data.credentialsFile else null;
-                    ExecStart = pkgs.writeScript "acme-start" ''
-                      #!${pkgs.runtimeShell} -e
-                      test -L ${spath}/accounts -o -d ${spath}/accounts || ln -s ../accounts ${spath}/accounts
-                      ${pkgs.lego}/bin/lego ${renewOpts} || ${pkgs.lego}/bin/lego ${runOpts}
-                    '';
-                    ExecStartPost =
-                      let
-                        keyName = builtins.replaceStrings ["*"] ["_"] data.domain;
-                        script = pkgs.writeScript "acme-post-start" ''
-                          #!${pkgs.runtimeShell} -e
-                          cd ${apath}
-
-                          # Test that existing cert is older than new cert
-                          KEY=${spath}/certificates/${keyName}.key
-                          KEY_CHANGED=no
-                          if [ -e $KEY -a $KEY -nt key.pem ]; then
-                            KEY_CHANGED=yes
-                            cp -p ${spath}/certificates/${keyName}.key key.pem
-                            cp -p ${spath}/certificates/${keyName}.crt fullchain.pem
-                            cp -p ${spath}/certificates/${keyName}.issuer.crt chain.pem
-                            ln -sf fullchain.pem cert.pem
-                            cat key.pem fullchain.pem > full.pem
-                          fi
-
-                          chmod ${fileMode} *.pem
-                          chown '${data.user}:${data.group}' *.pem
-
-                          if [ "$KEY_CHANGED" = "yes" ]; then
-                            : # noop in case postRun is empty
-                            ${data.postRun}
-                          fi
-                        '';
-                      in
-                        "+${script}";
-                  };
-
-                };
-                selfsignedService = {
-                  description = "Create preliminary self-signed certificate for ${cert}";
-                  path = [ pkgs.openssl ];
-                  script =
-                    ''
-                      workdir="$(mktemp -d)"
-
-                      # Create CA
-                      openssl genrsa -des3 -passout pass:xxxx -out $workdir/ca.pass.key 2048
-                      openssl rsa -passin pass:xxxx -in $workdir/ca.pass.key -out $workdir/ca.key
-                      openssl req -new -key $workdir/ca.key -out $workdir/ca.csr \
-                        -subj "/C=UK/ST=Warwickshire/L=Leamington/O=OrgName/OU=Security Department/CN=example.com"
-                      openssl x509 -req -days 1 -in $workdir/ca.csr -signkey $workdir/ca.key -out $workdir/ca.crt
-
-                      # Create key
-                      openssl genrsa -des3 -passout pass:xxxx -out $workdir/server.pass.key 2048
-                      openssl rsa -passin pass:xxxx -in $workdir/server.pass.key -out $workdir/server.key
-                      openssl req -new -key $workdir/server.key -out $workdir/server.csr \
-                        -subj "/C=UK/ST=Warwickshire/L=Leamington/O=OrgName/OU=IT Department/CN=example.com"
-                      openssl x509 -req -days 1 -in $workdir/server.csr -CA $workdir/ca.crt \
-                        -CAkey $workdir/ca.key -CAserial $workdir/ca.srl -CAcreateserial \
-                        -out $workdir/server.crt
-
-                      # Copy key to destination
-                      cp $workdir/server.key ${apath}/key.pem
-
-                      # Create fullchain.pem (same format as "simp_le ... -f fullchain.pem" creates)
-                      cat $workdir/{server.crt,ca.crt} > "${apath}/fullchain.pem"
-
-                      # Create full.pem for e.g. lighttpd
-                      cat $workdir/{server.key,server.crt,ca.crt} > "${apath}/full.pem"
-
-                      # Give key acme permissions
-                      chown '${data.user}:${data.group}' "${apath}/"{key,fullchain,full}.pem
-                      chmod ${fileMode} "${apath}/"{key,fullchain,full}.pem
-                    '';
-                  serviceConfig = {
-                    Type = "oneshot";
-                    PrivateTmp = true;
-                    StateDirectory = lpath;
-                    User = data.user;
-                    Group = data.group;
-                  };
-                  unitConfig = {
-                    # Do not create self-signed key when key already exists
-                    ConditionPathExists = "!${apath}/key.pem";
-                  };
-                };
-              in (
-                [ { name = "acme-${cert}"; value = acmeService; } ]
-                ++ optional cfg.preliminarySelfsigned { name = "acme-selfsigned-${cert}"; value = selfsignedService; }
-              );
-          servicesAttr = listToAttrs services;
-        in
-          servicesAttr;
-
-      systemd.tmpfiles.rules =
-        map (data: "d ${data.webroot}/.well-known/acme-challenge - ${data.user} ${data.group}") (filter (data: data.webroot != null) (attrValues cfg.certs));
-
-      systemd.timers = let
-        # Allow systemd to pick a convenient time within the day
-        # to run the check.
-        # This allows the coalescing of multiple timer jobs.
-        # We divide by the number of certificates so that if you
-        # have many certificates, the renewals are distributed over
-        # the course of the day to avoid rate limits.
-        numCerts = length (attrNames cfg.certs);
-        _24hSecs = 60 * 60 * 24;
-        AccuracySec = "${toString (_24hSecs / numCerts)}s";
-      in flip mapAttrs' cfg.certs (cert: data: nameValuePair
-        ("acme-${cert}")
-        ({
-          description = "Renew ACME Certificate for ${cert}";
-          wantedBy = [ "timers.target" ];
-          timerConfig = {
-            OnCalendar = cfg.renewInterval;
-            Unit = "acme-${cert}.service";
-            Persistent = "yes";
-            inherit AccuracySec;
-            # Skew randomly within the day, per https://letsencrypt.org/docs/integration-guide/.
-            RandomizedDelaySec = "24h";
-          };
-        })
-      );
-
-      systemd.targets.acme-selfsigned-certificates = mkIf cfg.preliminarySelfsigned {};
-      systemd.targets.acme-certificates = {};
-    })
+      ] ++ (builtins.concatLists (mapAttrsToList (cert: data: [
+        {
+          assertion = data.user == "_mkRemovedOptionModule";
+          message = ''
+            The option definition `security.acme.certs.${cert}.user' no longer has any effect; Please remove it.
+            Certificate user is now hard coded to the "acme" user. If you would
+            like another user to have access, consider adding them to the
+            "acme" group or changing security.acme.certs.${cert}.group.
+          '';
+        }
+        {
+          assertion = data.allowKeysForGroup == "_mkRemovedOptionModule";
+          message = ''
+            The option definition `security.acme.certs.${cert}.allowKeysForGroup' no longer has any effect; Please remove it.
+            All certs are readable by the configured group. If this is undesired,
+            consider changing security.acme.certs.${cert}.group to an unused group.
+          '';
+        }
+        # * in the cert value breaks building of systemd services, and makes
+        # referencing them as a user quite weird too. Best practice is to use
+        # the domain option.
+        {
+          assertion = ! hasInfix "*" cert;
+          message = ''
+            The cert option path `security.acme.certs.${cert}.dnsProvider`
+            cannot contain a * character.
+            Instead, set `security.acme.certs.${cert}.domain = "${cert}";`
+            and remove the wildcard from the path.
+          '';
+        }
+        {
+          assertion = data.dnsProvider == null || data.webroot == null;
+          message = ''
+            Options `security.acme.certs.${cert}.dnsProvider` and
+            `security.acme.certs.${cert}.webroot` are mutually exclusive.
+          '';
+        }
+      ]) cfg.certs));
+
+      users.users.acme = {
+        home = "/var/lib/acme";
+        group = "acme";
+        isSystemUser = true;
+      };
 
+      users.groups.acme = {};
+
+      systemd.services = {
+        "acme-fixperms" = userMigrationService;
+      } // (mapAttrs' (cert: conf: nameValuePair "acme-${cert}" conf.renewService) certConfigs)
+        // (optionalAttrs (cfg.preliminarySelfsigned) ({
+        "acme-selfsigned-ca" = selfsignCAService;
+      } // (mapAttrs' (cert: conf: nameValuePair "acme-selfsigned-${cert}" conf.selfsignService) certConfigs)));
+
+      systemd.timers = mapAttrs' (cert: conf: nameValuePair "acme-${cert}" conf.renewTimer) certConfigs;
+
+      # .lego and .lego/accounts specified to fix any incorrect permissions
+      systemd.tmpfiles.rules = [
+        "d /var/lib/acme/.lego - acme acme"
+        "d /var/lib/acme/.lego/accounts - acme acme"
+      ] ++ (unique (concatMap (conf: [
+          "d ${conf.accountDir} - acme acme"
+        ] ++ (optional (conf.webroot != null) "d ${conf.webroot}/.well-known/acme-challenge - acme ${conf.group}")
+      ) (attrValues certConfigs)));
+
+      # Create some targets which can be depended on to be "active" after cert renewals
+      systemd.targets = mapAttrs' (cert: conf: nameValuePair "acme-finished-${cert}" {
+        wantedBy = [ "default.target" ];
+        requires = [ "acme-${cert}.service" ] ++ conf.selfsignedDeps;
+        after = [ "acme-${cert}.service" ] ++ conf.selfsignedDeps;
+      }) certConfigs;
+    })
   ];
 
   meta = {
diff --git a/nixpkgs/nixos/modules/security/acme.xml b/nixpkgs/nixos/modules/security/acme.xml
index f802faee9749..17e94bc12fb2 100644
--- a/nixpkgs/nixos/modules/security/acme.xml
+++ b/nixpkgs/nixos/modules/security/acme.xml
@@ -72,7 +72,7 @@ services.nginx = {
     "foo.example.com" = {
       <link linkend="opt-services.nginx.virtualHosts._name_.forceSSL">forceSSL</link> = true;
       <link linkend="opt-services.nginx.virtualHosts._name_.enableACME">enableACME</link> = true;
-      # All serverAliases will be added as <link linkend="opt-security.acme.certs._name_.extraDomains">extra domains</link> on the certificate.
+      # All serverAliases will be added as <link linkend="opt-security.acme.certs._name_.extraDomainNames">extra domain names</link> on the certificate.
       <link linkend="opt-services.nginx.virtualHosts._name_.serverAliases">serverAliases</link> = [ "bar.example.com" ];
       locations."/" = {
         <link linkend="opt-services.nginx.virtualHosts._name_.locations._name_.root">root</link> = "/var/www";
@@ -80,8 +80,8 @@ services.nginx = {
     };
 
     # We can also add a different vhost and reuse the same certificate
-    # but we have to append extraDomains manually.
-    <link linkend="opt-security.acme.certs._name_.extraDomains">security.acme.certs."foo.example.com".extraDomains."baz.example.com"</link> = null;
+    # but we have to append extraDomainNames manually.
+    <link linkend="opt-security.acme.certs._name_.extraDomainNames">security.acme.certs."foo.example.com".extraDomainNames</link> = [ "baz.example.com" ];
     "baz.example.com" = {
       <link linkend="opt-services.nginx.virtualHosts._name_.forceSSL">forceSSL</link> = true;
       <link linkend="opt-services.nginx.virtualHosts._name_.useACMEHost">useACMEHost</link> = "foo.example.com";
@@ -165,7 +165,7 @@ services.httpd = {
   # Since we have a wildcard vhost to handle port 80,
   # we can generate certs for anything!
   # Just make sure your DNS resolves them.
-  <link linkend="opt-security.acme.certs._name_.extraDomains">extraDomains</link> = [ "mail.example.com" ];
+  <link linkend="opt-security.acme.certs._name_.extraDomainNames">extraDomainNames</link> = [ "mail.example.com" ];
 };
 </programlisting>
 
@@ -251,4 +251,16 @@ chmod 400 /var/lib/secrets/certs.secret
    journalctl -fu acme-example.com.service</literal> and watching its log output.
   </para>
  </section>
+ <section xml:id="module-security-acme-regenerate">
+  <title>Regenerating certificates</title>
+
+  <para>
+   Should you need to regenerate a particular certificate in a hurry, such
+   as when a vulnerability is found in Let's Encrypt, there is now a convenient
+   mechanism for doing so. Running <literal>systemctl clean acme-example.com.service</literal>
+   will remove all certificate files for the given domain, allowing you to then
+   <literal>systemctl start acme-example.com.service</literal> to generate fresh
+   ones.
+  </para>
+ </section>
 </chapter>
diff --git a/nixpkgs/nixos/modules/security/apparmor.nix b/nixpkgs/nixos/modules/security/apparmor.nix
index cfc65b347bc6..2ee10454fd26 100644
--- a/nixpkgs/nixos/modules/security/apparmor.nix
+++ b/nixpkgs/nixos/modules/security/apparmor.nix
@@ -23,11 +23,17 @@ in
          default = [];
          description = "List of packages to be added to apparmor's include path";
        };
+       parserConfig = mkOption {
+         type = types.str;
+         default = "";
+         description = "AppArmor parser configuration file content";
+       };
      };
    };
 
    config = mkIf cfg.enable {
      environment.systemPackages = [ pkgs.apparmor-utils ];
+     environment.etc."apparmor/parser.conf".text = cfg.parserConfig;
 
      boot.kernelParams = [ "apparmor=1" "security=apparmor" ];
 
diff --git a/nixpkgs/nixos/modules/security/duosec.nix b/nixpkgs/nixos/modules/security/duosec.nix
index 71428b82f5da..c47be80b9dc3 100644
--- a/nixpkgs/nixos/modules/security/duosec.nix
+++ b/nixpkgs/nixos/modules/security/duosec.nix
@@ -51,7 +51,7 @@ in
       };
 
       secretKeyFile = mkOption {
-        type = types.path;
+        type = types.nullOr types.path;
         default = null;
         description = ''
           A file containing your secret key. The security of your Duo application is tied to the security of your secret key.
diff --git a/nixpkgs/nixos/modules/security/misc.nix b/nixpkgs/nixos/modules/security/misc.nix
index 16e3bfb14199..d51dbbb77f71 100644
--- a/nixpkgs/nixos/modules/security/misc.nix
+++ b/nixpkgs/nixos/modules/security/misc.nix
@@ -27,6 +27,16 @@ with lib;
       '';
     };
 
+    security.unprivilegedUsernsClone = mkOption {
+      type = types.bool;
+      default = false;
+      description = ''
+        When disabled, unprivileged users will not be able to create new namespaces.
+        By default unprivileged user namespaces are disabled.
+        This option only works in a hardened profile.
+      '';
+    };
+
     security.protectKernelImage = mkOption {
       type = types.bool;
       default = false;
@@ -115,6 +125,10 @@ with lib;
       ];
     })
 
+    (mkIf config.security.unprivilegedUsernsClone {
+      boot.kernel.sysctl."kernel.unprivileged_userns_clone" = mkDefault true;
+    })
+
     (mkIf config.security.protectKernelImage {
       # Disable hibernation (allows replacing the running kernel)
       boot.kernelParams = [ "nohibernate" ];
diff --git a/nixpkgs/nixos/modules/security/pam.nix b/nixpkgs/nixos/modules/security/pam.nix
index 688344852aeb..4141a17c5072 100644
--- a/nixpkgs/nixos/modules/security/pam.nix
+++ b/nixpkgs/nixos/modules/security/pam.nix
@@ -36,6 +36,17 @@ let
         '';
       };
 
+      p11Auth = mkOption {
+        default = config.security.pam.p11.enable;
+        type = types.bool;
+        description = ''
+          If set, keys listed in
+          <filename>~/.ssh/authorized_keys</filename> and
+          <filename>~/.eid/authorized_certificates</filename>
+          can be used to log in with the associated PKCS#11 tokens.
+        '';
+      };
+
       u2fAuth = mkOption {
         default = config.security.pam.u2f.enable;
         type = types.bool;
@@ -352,6 +363,8 @@ let
               "auth sufficient ${pkgs.pam_ssh_agent_auth}/libexec/pam_ssh_agent_auth.so file=~/.ssh/authorized_keys:~/.ssh/authorized_keys2:/etc/ssh/authorized_keys.d/%u"}
           ${optionalString cfg.fprintAuth
               "auth sufficient ${pkgs.fprintd}/lib/security/pam_fprintd.so"}
+          ${let p11 = config.security.pam.p11; in optionalString cfg.p11Auth
+              "auth ${p11.control} ${pkgs.pam_p11}/lib/security/pam_p11.so ${pkgs.opensc}/lib/opensc-pkcs11.so"}
           ${let u2f = config.security.pam.u2f; in optionalString cfg.u2fAuth
               "auth ${u2f.control} ${pkgs.pam_u2f}/lib/security/pam_u2f.so ${optionalString u2f.debug "debug"} ${optionalString (u2f.authFile != null) "authfile=${u2f.authFile}"} ${optionalString u2f.interactive "interactive"} ${optionalString u2f.cue "cue"}"}
           ${optionalString cfg.usbAuth
@@ -381,7 +394,7 @@ let
                 "auth optional ${pkgs.pam_mount}/lib/security/pam_mount.so"}
               ${optionalString cfg.enableKwallet
                 ("auth optional ${pkgs.plasma5.kwallet-pam}/lib/security/pam_kwallet5.so" +
-                 " kwalletd=${pkgs.libsForQt5.kwallet.bin}/bin/kwalletd5")}
+                 " kwalletd=${pkgs.kdeFrameworks.kwallet.bin}/bin/kwalletd5")}
               ${optionalString cfg.enableGnomeKeyring
                 "auth optional ${pkgs.gnome3.gnome-keyring}/lib/security/pam_gnome_keyring.so"}
               ${optionalString cfg.googleAuthenticator.enable
@@ -458,7 +471,7 @@ let
               "session optional ${pkgs.apparmor-pam}/lib/security/pam_apparmor.so order=user,group,default debug"}
           ${optionalString (cfg.enableKwallet)
               ("session optional ${pkgs.plasma5.kwallet-pam}/lib/security/pam_kwallet5.so" +
-               " kwalletd=${pkgs.libsForQt5.kwallet.bin}/bin/kwalletd5")}
+               " kwalletd=${pkgs.kdeFrameworks.kwallet.bin}/bin/kwalletd5")}
           ${optionalString (cfg.enableGnomeKeyring)
               "session optional ${pkgs.gnome3.gnome-keyring}/lib/security/pam_gnome_keyring.so auto_start"}
           ${optionalString (config.virtualisation.lxc.lxcfs.enable)
@@ -531,7 +544,7 @@ in
 
     security.pam.services = mkOption {
       default = [];
-      type = with types; loaOf (submodule pamOpts);
+      type = with types; attrsOf (submodule pamOpts);
       description =
         ''
           This option defines the PAM services.  A service typically
@@ -566,6 +579,39 @@ in
 
     security.pam.enableOTPW = mkEnableOption "the OTPW (one-time password) PAM module";
 
+    security.pam.p11 = {
+      enable = mkOption {
+        default = false;
+        type = types.bool;
+        description = ''
+          Enables P11 PAM (<literal>pam_p11</literal>) module.
+
+          If set, users can log in with SSH keys and PKCS#11 tokens.
+
+          More information can be found <link
+          xlink:href="https://github.com/OpenSC/pam_p11">here</link>.
+        '';
+      };
+
+      control = mkOption {
+        default = "sufficient";
+        type = types.enum [ "required" "requisite" "sufficient" "optional" ];
+        description = ''
+          This option sets pam "control".
+          If you want to have multi factor authentication, use "required".
+          If you want to use the PKCS#11 device instead of the regular password,
+          use "sufficient".
+
+          Read
+          <citerefentry>
+            <refentrytitle>pam.conf</refentrytitle>
+            <manvolnum>5</manvolnum>
+          </citerefentry>
+          for better understanding of this option.
+        '';
+      };
+    };
+
     security.pam.u2f = {
       enable = mkOption {
         default = false;
@@ -747,6 +793,7 @@ in
       ++ optionals config.krb5.enable [pam_krb5 pam_ccreds]
       ++ optionals config.security.pam.enableOTPW [ pkgs.otpw ]
       ++ optionals config.security.pam.oath.enable [ pkgs.oathToolkit ]
+      ++ optionals config.security.pam.p11.enable [ pkgs.pam_p11 ]
       ++ optionals config.security.pam.u2f.enable [ pkgs.pam_u2f ];
 
     boot.supportedFilesystems = optionals config.security.pam.enableEcryptfs [ "ecryptfs" ];
diff --git a/nixpkgs/nixos/modules/security/rngd.nix b/nixpkgs/nixos/modules/security/rngd.nix
index cffa1a5849f9..cb885c4762d0 100644
--- a/nixpkgs/nixos/modules/security/rngd.nix
+++ b/nixpkgs/nixos/modules/security/rngd.nix
@@ -10,11 +10,10 @@ in
     security.rngd = {
       enable = mkOption {
         type = types.bool;
-        default = true;
+        default = false;
         description = ''
-          Whether to enable the rng daemon, which adds entropy from
-          hardware sources of randomness to the kernel entropy pool when
-          available.
+          Whether to enable the rng daemon.  Devices that the kernel recognises
+          as entropy sources are handled automatically by krngd.
         '';
       };
       debug = mkOption {
@@ -26,12 +25,6 @@ in
   };
 
   config = mkIf cfg.enable {
-    services.udev.extraRules = ''
-      KERNEL=="random", TAG+="systemd"
-      SUBSYSTEM=="cpu", ENV{MODALIAS}=="cpu:type:x86,*feature:*009E*", TAG+="systemd", ENV{SYSTEMD_WANTS}+="rngd.service"
-      KERNEL=="hw_random", TAG+="systemd", ENV{SYSTEMD_WANTS}+="rngd.service"
-    '';
-
     systemd.services.rngd = {
       bindsTo = [ "dev-random.device" ];
 
diff --git a/nixpkgs/nixos/modules/security/systemd-confinement.nix b/nixpkgs/nixos/modules/security/systemd-confinement.nix
index 0a400f1d535b..2927d424a8a2 100644
--- a/nixpkgs/nixos/modules/security/systemd-confinement.nix
+++ b/nixpkgs/nixos/modules/security/systemd-confinement.nix
@@ -135,7 +135,7 @@ in {
           ];
           execPkgs = lib.concatMap (opt: let
             isSet = config.serviceConfig ? ${opt};
-          in lib.optional isSet config.serviceConfig.${opt}) execOpts;
+          in lib.flatten (lib.optional isSet config.serviceConfig.${opt})) execOpts;
           unitAttrs = toplevelConfig.systemd.units."${name}.service";
           allPkgs = lib.singleton (builtins.toJSON unitAttrs);
           unitPkgs = if fullUnit then allPkgs else execPkgs;
diff --git a/nixpkgs/nixos/modules/security/tpm2.nix b/nixpkgs/nixos/modules/security/tpm2.nix
index 13804fb82cba..27f9b58c9755 100644
--- a/nixpkgs/nixos/modules/security/tpm2.nix
+++ b/nixpkgs/nixos/modules/security/tpm2.nix
@@ -170,7 +170,6 @@ in {
           Restart = "always";
           RestartSec = 30;
           BusName = "com.intel.tss2.Tabrmd";
-          StandardOutput = "syslog";
           ExecStart = "${cfg.abrmd.package}/bin/tpm2-abrmd";
           User = "tss";
           Group = "nogroup";
diff --git a/nixpkgs/nixos/modules/security/wrappers/default.nix b/nixpkgs/nixos/modules/security/wrappers/default.nix
index a0fadb018eca..2def74f85353 100644
--- a/nixpkgs/nixos/modules/security/wrappers/default.nix
+++ b/nixpkgs/nixos/modules/security/wrappers/default.nix
@@ -160,8 +160,11 @@ in
   config = {
 
     security.wrappers = {
+      # These are mount related wrappers that require the +s permission.
       fusermount.source = "${pkgs.fuse}/bin/fusermount";
       fusermount3.source = "${pkgs.fuse3}/bin/fusermount3";
+      mount.source = "${lib.getBin pkgs.utillinux}/bin/mount";
+      umount.source = "${lib.getBin pkgs.utillinux}/bin/umount";
     };
 
     boot.specialFileSystems.${parentWrapperDir} = {
diff --git a/nixpkgs/nixos/modules/services/audio/icecast.nix b/nixpkgs/nixos/modules/services/audio/icecast.nix
index 6a8a0f9975b3..6ca20a7a1086 100644
--- a/nixpkgs/nixos/modules/services/audio/icecast.nix
+++ b/nixpkgs/nixos/modules/services/audio/icecast.nix
@@ -23,7 +23,7 @@ let
       <listen-socket>
         <port>${toString cfg.listen.port}</port>
         <bind-address>${cfg.listen.address}</bind-address>
-      </listen-socket>   
+      </listen-socket>
 
       <security>
         <chroot>0</chroot>
@@ -47,7 +47,7 @@ in {
       enable = mkEnableOption "Icecast server";
 
       hostname = mkOption {
-        type = types.str;
+        type = types.nullOr types.str;
         description = "DNS name or IP address that will be used for the stream directory lookups or possibily the playlist generation if a Host header is not provided.";
         default = config.networking.domain;
       };
@@ -70,7 +70,7 @@ in {
         description = "Base directory used for logging.";
         default = "/var/log/icecast";
       };
-      
+
       listen = {
         port = mkOption {
           type = types.int;
diff --git a/nixpkgs/nixos/modules/services/audio/mpd.nix b/nixpkgs/nixos/modules/services/audio/mpd.nix
index f4eb4a265a46..ba20b1b98d97 100644
--- a/nixpkgs/nixos/modules/services/audio/mpd.nix
+++ b/nixpkgs/nixos/modules/services/audio/mpd.nix
@@ -11,6 +11,10 @@ let
   cfg = config.services.mpd;
 
   mpdConf = pkgs.writeText "mpd.conf" ''
+    # This file was automatically generated by NixOS. Edit mpd's configuration
+    # via NixOS' configuration.nix, as this file will be rewritten upon mpd's
+    # restart.
+
     music_directory     "${cfg.musicDirectory}"
     playlist_directory  "${cfg.playlistDirectory}"
     ${lib.optionalString (cfg.dbFile != null) ''
@@ -21,6 +25,12 @@ let
 
     ${optionalString (cfg.network.listenAddress != "any") ''bind_to_address "${cfg.network.listenAddress}"''}
     ${optionalString (cfg.network.port != 6600)  ''port "${toString cfg.network.port}"''}
+    ${optionalString (cfg.fluidsynth) ''
+      decoder {
+              plugin "fluidsynth"
+              soundfont "${pkgs.soundfont-fluid}/share/soundfonts/FluidR3_GM2-2.sf2"
+      }
+    ''}
 
     ${cfg.extraConfig}
   '';
@@ -133,6 +143,26 @@ in {
           parameter is omitted from the configuration.
         '';
       };
+
+      credentialsFile = mkOption {
+        type = types.path;
+        description = ''
+          Path to a file to be merged with the settings during the service startup.
+          Useful to merge a file which is better kept out of the Nix store
+          because it contains sensible data like MPD's password. Example may look like this:
+          <literal>password "myMpdPassword@read,add,control,admin"</literal>
+        '';
+        default = "/dev/null";
+        example = "/var/lib/secrets/mpd.conf";
+      };
+
+      fluidsynth = mkOption {
+        type = types.bool;
+        default = false;
+        description = ''
+          If set, add fluidsynth soundfont and configure the plugin.
+        '';
+      };
     };
 
   };
@@ -167,7 +197,12 @@ in {
 
       serviceConfig = {
         User = "${cfg.user}";
-        ExecStart = "${pkgs.mpd}/bin/mpd --no-daemon ${mpdConf}";
+        ExecStart = "${pkgs.mpd}/bin/mpd --no-daemon /etc/mpd.conf";
+        ExecStartPre = pkgs.writeScript "mpd-start-pre" ''
+          #!${pkgs.runtimeShell}
+          set -euo pipefail
+          cat ${mpdConf} ${cfg.credentialsFile} > /etc/mpd.conf
+        '';
         Type = "notify";
         LimitRTPRIO = 50;
         LimitRTTIME = "infinity";
@@ -181,6 +216,14 @@ in {
         Restart = "always";
       };
     };
+    environment.etc."mpd.conf" = {
+      mode = "0640";
+      group = cfg.group;
+      user = cfg.user;
+      # To be modified by the service' ExecStartPre
+      text = ''
+      '';
+    };
 
     users.users = optionalAttrs (cfg.user == name) {
       ${name} = {
diff --git a/nixpkgs/nixos/modules/services/audio/roon-server.nix b/nixpkgs/nixos/modules/services/audio/roon-server.nix
index 6aed485638cc..eceb65044c5b 100644
--- a/nixpkgs/nixos/modules/services/audio/roon-server.nix
+++ b/nixpkgs/nixos/modules/services/audio/roon-server.nix
@@ -45,14 +45,14 @@ in {
       environment.ROON_DATAROOT = "/var/lib/${name}";
 
       serviceConfig = {
-        ExecStart = "${pkgs.roon-server}/opt/start.sh";
+        ExecStart = "${pkgs.roon-server}/start.sh";
         LimitNOFILE = 8192;
         User = cfg.user;
         Group = cfg.group;
         StateDirectory = name;
       };
     };
-    
+
     networking.firewall = mkIf cfg.openFirewall {
       allowedTCPPortRanges = [
         { from = 9100; to = 9200; }
@@ -60,7 +60,7 @@ in {
       allowedUDPPorts = [ 9003 ];
     };
 
-    
+
     users.groups.${cfg.group} = {};
     users.users.${cfg.user} =
       if cfg.user == "roon-server" then {
diff --git a/nixpkgs/nixos/modules/services/audio/snapserver.nix b/nixpkgs/nixos/modules/services/audio/snapserver.nix
index b0b9264e8166..f614f0ba3e10 100644
--- a/nixpkgs/nixos/modules/services/audio/snapserver.nix
+++ b/nixpkgs/nixos/modules/services/audio/snapserver.nix
@@ -31,27 +31,42 @@ let
     let
       os = val:
         optionalString (val != null) "${val}";
-      os' = prefixx: val:
-        optionalString (val != null) (prefixx + "${val}");
+      os' = prefix: val:
+        optionalString (val != null) (prefix + "${val}");
       flatten = key: value:
         "&${key}=${value}";
     in
-      "-s ${opt.type}://" + os opt.location + "?" + os' "name=" name
-        + concatStrings (mapAttrsToList flatten opt.query);
+      "--stream.stream=\"${opt.type}://" + os opt.location + "?" + os' "name=" name
+        + concatStrings (mapAttrsToList flatten opt.query) + "\"";
 
   optionalNull = val: ret:
     optional (val != null) ret;
 
   optionString = concatStringsSep " " (mapAttrsToList streamToOption cfg.streams
-             ++ ["-p ${toString cfg.port}"]
-             ++ ["--controlPort ${toString cfg.controlPort}"]
-             ++ optionalNull cfg.sampleFormat "--sampleFormat ${cfg.sampleFormat}"
-             ++ optionalNull cfg.codec "-c ${cfg.codec}"
-             ++ optionalNull cfg.streamBuffer "--streamBuffer ${cfg.streamBuffer}"
-             ++ optionalNull cfg.buffer "-b ${cfg.buffer}"
-             ++ optional cfg.sendToMuted "--sendToMuted");
+    # global options
+    ++ [ "--stream.bind_to_address ${cfg.listenAddress}" ]
+    ++ [ "--stream.port ${toString cfg.port}" ]
+    ++ optionalNull cfg.sampleFormat "--stream.sampleformat ${cfg.sampleFormat}"
+    ++ optionalNull cfg.codec "--stream.codec ${cfg.codec}"
+    ++ optionalNull cfg.streamBuffer "--stream.stream_buffer ${cfg.streamBuffer}"
+    ++ optionalNull cfg.buffer "--stream.buffer ${cfg.buffer}"
+    ++ optional cfg.sendToMuted "--stream.send_to_muted"
+    # tcp json rpc
+    ++ [ "--tcp.enabled ${toString cfg.tcp.enable}" ]
+    ++ optionals cfg.tcp.enable [
+      "--tcp.address ${cfg.tcp.listenAddress}"
+      "--tcp.port ${toString cfg.tcp.port}" ]
+     # http json rpc
+    ++ [ "--http.enabled ${toString cfg.http.enable}" ]
+    ++ optionals cfg.http.enable [
+      "--http.address ${cfg.http.listenAddress}"
+      "--http.port ${toString cfg.http.port}"
+    ] ++ optional (cfg.http.docRoot != null) "--http.doc_root \"${toString cfg.http.docRoot}\"");
 
 in {
+  imports = [
+    (mkRenamedOptionModule [ "services" "snapserver" "controlPort"] [ "services" "snapserver" "tcp" "port" ])
+  ];
 
   ###### interface
 
@@ -67,6 +82,15 @@ in {
         '';
       };
 
+      listenAddress = mkOption {
+        type = types.str;
+        default = "::";
+        example = "0.0.0.0";
+        description = ''
+          The address where snapclients can connect.
+        '';
+      };
+
       port = mkOption {
         type = types.port;
         default = 1704;
@@ -75,24 +99,100 @@ in {
         '';
       };
 
-      controlPort = mkOption {
+      openFirewall = mkOption {
+        type = types.bool;
+        default = true;
+        description = ''
+          Whether to automatically open the specified ports in the firewall.
+        '';
+      };
+
+      inherit sampleFormat;
+      inherit codec;
+
+      streamBuffer = mkOption {
+        type = with types; nullOr int;
+        default = null;
+        description = ''
+          Stream read (input) buffer in ms.
+        '';
+        example = 20;
+      };
+
+      buffer = mkOption {
+        type = with types; nullOr int;
+        default = null;
+        description = ''
+          Network buffer in ms.
+        '';
+        example = 1000;
+      };
+
+      sendToMuted = mkOption {
+        type = types.bool;
+        default = false;
+        description = ''
+          Send audio to muted clients.
+        '';
+      };
+
+      tcp.enable = mkOption {
+        type = types.bool;
+        default = true;
+        description = ''
+          Whether to enable the JSON-RPC via TCP.
+        '';
+      };
+
+      tcp.listenAddress = mkOption {
+        type = types.str;
+        default = "::";
+        example = "0.0.0.0";
+        description = ''
+          The address where the TCP JSON-RPC listens on.
+        '';
+      };
+
+      tcp.port = mkOption {
         type = types.port;
         default = 1705;
         description = ''
-          The port for control connections (JSON-RPC).
+          The port where the TCP JSON-RPC listens on.
         '';
       };
 
-      openFirewall = mkOption {
+      http.enable = mkOption {
         type = types.bool;
         default = true;
         description = ''
-          Whether to automatically open the specified ports in the firewall.
+          Whether to enable the JSON-RPC via HTTP.
         '';
       };
 
-      inherit sampleFormat;
-      inherit codec;
+      http.listenAddress = mkOption {
+        type = types.str;
+        default = "::";
+        example = "0.0.0.0";
+        description = ''
+          The address where the HTTP JSON-RPC listens on.
+        '';
+      };
+
+      http.port = mkOption {
+        type = types.port;
+        default = 1780;
+        description = ''
+          The port where the HTTP JSON-RPC listens on.
+        '';
+      };
+
+      http.docRoot = mkOption {
+        type = with types; nullOr path;
+        default = null;
+        description = ''
+          Path to serve from the HTTP servers root.
+        '';
+      };
 
       streams = mkOption {
         type = with types; attrsOf (submodule {
@@ -147,34 +247,7 @@ in {
           };
         '';
       };
-
-      streamBuffer = mkOption {
-        type = with types; nullOr int;
-        default = null;
-        description = ''
-          Stream read (input) buffer in ms.
-        '';
-        example = 20;
-      };
-
-      buffer = mkOption {
-        type = with types; nullOr int;
-        default = null;
-        description = ''
-          Network buffer in ms.
-        '';
-        example = 1000;
-      };
-
-      sendToMuted = mkOption {
-        type = types.bool;
-        default = false;
-        description = ''
-          Send audio to muted clients.
-        '';
-      };
     };
-
   };
 
 
@@ -206,7 +279,10 @@ in {
       };
     };
 
-    networking.firewall.allowedTCPPorts = optionals cfg.openFirewall [ cfg.port cfg.controlPort ];
+    networking.firewall.allowedTCPPorts =
+      optionals cfg.openFirewall [ cfg.port ]
+      ++ optional cfg.tcp.enable cfg.tcp.port
+      ++ optional cfg.http.enable cfg.http.port;
   };
 
   meta = {
diff --git a/nixpkgs/nixos/modules/services/audio/spotifyd.nix b/nixpkgs/nixos/modules/services/audio/spotifyd.nix
index 4b74e7532795..a589153248fe 100644
--- a/nixpkgs/nixos/modules/services/audio/spotifyd.nix
+++ b/nixpkgs/nixos/modules/services/audio/spotifyd.nix
@@ -16,7 +16,7 @@ in
         type = types.lines;
         description = ''
           Configuration for Spotifyd. For syntax and directives, see
-          https://github.com/Spotifyd/spotifyd#Configuration.
+          <link xlink:href="https://github.com/Spotifyd/spotifyd#Configuration"/>.
         '';
       };
     };
diff --git a/nixpkgs/nixos/modules/services/backup/bacula.nix b/nixpkgs/nixos/modules/services/backup/bacula.nix
index cef304734aee..3d69a69038a3 100644
--- a/nixpkgs/nixos/modules/services/backup/bacula.nix
+++ b/nixpkgs/nixos/modules/services/backup/bacula.nix
@@ -18,7 +18,7 @@ let
         Pid Directory = "/run";
         ${fd_cfg.extraClientConfig}
       }
-     
+
       ${concatStringsSep "\n" (mapAttrsToList (name: value: ''
       Director {
         Name = "${name}";
@@ -26,7 +26,7 @@ let
         Monitor = "${value.monitor}";
       }
       '') fd_cfg.director)}
-     
+
       Messages {
         Name = Standard;
         syslog = all, !skipped, !restored
@@ -35,7 +35,7 @@ let
     '';
 
   sd_cfg = config.services.bacula-sd;
-  sd_conf = pkgs.writeText "bacula-sd.conf" 
+  sd_conf = pkgs.writeText "bacula-sd.conf"
     ''
       Storage {
         Name = "${sd_cfg.name}";
@@ -80,7 +80,7 @@ let
     '';
 
   dir_cfg = config.services.bacula-dir;
-  dir_conf = pkgs.writeText "bacula-dir.conf" 
+  dir_conf = pkgs.writeText "bacula-dir.conf"
     ''
     Director {
       Name = "${dir_cfg.name}";
@@ -125,10 +125,10 @@ let
 
           The password is plain text. It is not generated through any special
           process but as noted above, it is better to use random text for
-          security reasons. 
+          security reasons.
         '';
       };
-      
+
       monitor = mkOption {
         default = "no";
         example = "yes";
@@ -140,7 +140,7 @@ let
 
           Please note that if this director is being used by a Monitor, we
           highly recommend to set this directive to yes to avoid serious
-          security problems. 
+          security problems.
         '';
       };
     };
@@ -163,7 +163,7 @@ let
           type of autochanger, what you specify here can vary. This directive
           is optional. See the Using AutochangersAutochangersChapter chapter of
           this manual for more details of using this and the following
-          autochanger directives.         
+          autochanger directives.
           '';
       };
 
@@ -200,7 +200,7 @@ let
           Extra configuration to be passed in Autochanger directive.
         '';
         example = ''
-   
+
         '';
       };
     };
@@ -222,7 +222,7 @@ let
           if you are archiving to disk storage. In this case, you must supply
           the full absolute path to the directory. When specifying a tape
           device, it is preferable that the "non-rewind" variant of the device
-          file name be given. 
+          file name be given.
         '';
       };
 
@@ -290,7 +290,7 @@ in {
           Whether to enable the Bacula File Daemon.
         '';
       };
- 
+
       name = mkOption {
         default = "${config.networking.hostName}-fd";
         description = ''
@@ -300,7 +300,7 @@ in {
           Clients. This directive is required.
         '';
       };
- 
+
       port = mkOption {
         default = 9102;
         type = types.int;
@@ -310,7 +310,7 @@ in {
           the Client resource of the Director's configuration file.
         '';
       };
- 
+
       director = mkOption {
         default = {};
         description = ''
@@ -349,14 +349,14 @@ in {
           Whether to enable Bacula Storage Daemon.
         '';
       };
- 
+
       name = mkOption {
         default = "${config.networking.hostName}-sd";
         description = ''
           Specifies the Name of the Storage daemon.
         '';
       };
- 
+
       port = mkOption {
         default = 9103;
         type = types.int;
@@ -410,7 +410,7 @@ in {
           console = all
         '';
       };
- 
+
     };
 
     services.bacula-dir = {
@@ -429,7 +429,7 @@ in {
           required.
         '';
       };
- 
+
       port = mkOption {
         default = 9101;
         type = types.int;
@@ -442,7 +442,7 @@ in {
           specify DirAddresses (N.B plural) directive.
         '';
       };
- 
+
       password = mkOption {
         # TODO: required?
         description = ''
diff --git a/nixpkgs/nixos/modules/services/backup/borgbackup.xml b/nixpkgs/nixos/modules/services/backup/borgbackup.xml
index bef7db608f82..8f623c936568 100644
--- a/nixpkgs/nixos/modules/services/backup/borgbackup.xml
+++ b/nixpkgs/nixos/modules/services/backup/borgbackup.xml
@@ -69,10 +69,10 @@
     access this single repository. You need the output of the generate pub file.
   </para>
     <para>
-        <programlisting>
-# sudo ssh-keygen -N '' -t ed25519 -f /run/keys/id_ed25519_my_borg_repo
-# cat /run/keys/id_ed25519_my_borg_repo
-ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAID78zmOyA+5uPG4Ot0hfAy+sLDPU1L4AiIoRYEIVbbQ/ root@nixos</programlisting>
+<screen>
+<prompt># </prompt>sudo ssh-keygen -N '' -t ed25519 -f /run/keys/id_ed25519_my_borg_repo
+<prompt># </prompt>cat /run/keys/id_ed25519_my_borg_repo
+ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAID78zmOyA+5uPG4Ot0hfAy+sLDPU1L4AiIoRYEIVbbQ/ root@nixos</screen>
     </para>
     <para>
       Add the following snippet to your NixOS configuration:
@@ -197,26 +197,8 @@ sudo borg init --encryption=repokey-blake2  \
     disk failure, ransomware and theft.
   </para>
   <para>
-    It is available as a flatpak package. To enable it you must set the
-    following two configuration items.
-  </para>
-  <para>
-    <programlisting>
-services.flatpak.enable = true ;
-# next line is needed to avoid the Error
-# Error deploying: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown:
-services.accounts-daemon.enable = true;
-    </programlisting>
-  </para>
-  <para>As a normal user you must first install, then run vorta using the
-    following commands:
-    <programlisting>
-flatpak remote-add --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo
-flatpak install flathub com.borgbase.Vorta
-flatpak run --branch=stable --arch=x86_64 --command=vorta com.borgbase.Vorta
-</programlisting>
-    After running <code>flatpak install</code> you can start Vorta also via
-        the KDE application menu.
+   It can be installed in NixOS e.g. by adding <package>pkgs.vorta</package>
+   to <xref linkend="opt-environment.systemPackages" />.
   </para>
   <para>
     Details about using Vorta can be found under <link
diff --git a/nixpkgs/nixos/modules/services/backup/restic.nix b/nixpkgs/nixos/modules/services/backup/restic.nix
index 2388f1d6ca13..d869835bf07e 100644
--- a/nixpkgs/nixos/modules/services/backup/restic.nix
+++ b/nixpkgs/nixos/modules/services/backup/restic.nix
@@ -31,6 +31,59 @@ in
           '';
         };
 
+        rcloneOptions = mkOption {
+          type = with types; nullOr (attrsOf (oneOf [ str bool ]));
+          default = null;
+          description = ''
+            Options to pass to rclone to control its behavior.
+            See <link xlink:href="https://rclone.org/docs/#options"/> for
+            available options. When specifying option names, strip the
+            leading <literal>--</literal>. To set a flag such as
+            <literal>--drive-use-trash</literal>, which does not take a value,
+            set the value to the Boolean <literal>true</literal>.
+          '';
+          example = {
+            bwlimit = "10M";
+            drive-use-trash = "true";
+          };
+        };
+
+        rcloneConfig = mkOption {
+          type = with types; nullOr (attrsOf (oneOf [ str bool ]));
+          default = null;
+          description = ''
+            Configuration for the rclone remote being used for backup.
+            See the remote's specific options under rclone's docs at
+            <link xlink:href="https://rclone.org/docs/"/>. When specifying
+            option names, use the "config" name specified in the docs.
+            For example, to set <literal>--b2-hard-delete</literal> for a B2
+            remote, use <literal>hard_delete = true</literal> in the
+            attribute set.
+            Warning: Secrets set in here will be world-readable in the Nix
+            store! Consider using the <literal>rcloneConfigFile</literal>
+            option instead to specify secret values separately. Note that
+            options set here will override those set in the config file.
+          '';
+          example = {
+            type = "b2";
+            account = "xxx";
+            key = "xxx";
+            hard_delete = true;
+          };
+        };
+
+        rcloneConfigFile = mkOption {
+          type = with types; nullOr path;
+          default = null;
+          description = ''
+            Path to the file containing rclone configuration. This file
+            must contain configuration for the remote specified in this backup
+            set and also must be readable by root. Options set in
+            <literal>rcloneConfig</literal> will override those set in this
+            file.
+          '';
+        };
+
         repository = mkOption {
           type = types.str;
           description = ''
@@ -170,11 +223,22 @@ in
             ( resticCmd + " forget --prune " + (concatStringsSep " " backup.pruneOpts) )
             ( resticCmd + " check" )
           ];
+          # Helper functions for rclone remotes
+          rcloneRemoteName = builtins.elemAt (splitString ":" backup.repository) 1;
+          rcloneAttrToOpt = v: "RCLONE_" + toUpper (builtins.replaceStrings [ "-" ] [ "_" ] v);
+          rcloneAttrToConf = v: "RCLONE_CONFIG_" + toUpper (rcloneRemoteName + "_" + v);
+          toRcloneVal = v: if lib.isBool v then lib.boolToString v else v;
         in nameValuePair "restic-backups-${name}" ({
           environment = {
             RESTIC_PASSWORD_FILE = backup.passwordFile;
             RESTIC_REPOSITORY = backup.repository;
-          };
+          } // optionalAttrs (backup.rcloneOptions != null) (mapAttrs' (name: value:
+            nameValuePair (rcloneAttrToOpt name) (toRcloneVal value)
+          ) backup.rcloneOptions) // optionalAttrs (backup.rcloneConfigFile != null) {
+            RCLONE_CONFIG = backup.rcloneConfigFile;
+          } // optionalAttrs (backup.rcloneConfig != null) (mapAttrs' (name: value:
+            nameValuePair (rcloneAttrToConf name) (toRcloneVal value)
+          ) backup.rcloneConfig);
           path = [ pkgs.openssh ];
           restartIfChanged = false;
           serviceConfig = {
diff --git a/nixpkgs/nixos/modules/services/backup/zfs-replication.nix b/nixpkgs/nixos/modules/services/backup/zfs-replication.nix
index 5a64304275d5..6d75774c78f9 100644
--- a/nixpkgs/nixos/modules/services/backup/zfs-replication.nix
+++ b/nixpkgs/nixos/modules/services/backup/zfs-replication.nix
@@ -18,7 +18,7 @@ in {
       };
 
       host = mkOption {
-        description = "Remote host where snapshots should be sent.";
+        description = "Remote host where snapshots should be sent. <literal>lz4</literal> is expected to be installed on this host.";
         example = "example.com";
         type = types.str;
       };
diff --git a/nixpkgs/nixos/modules/services/backup/znapzend.nix b/nixpkgs/nixos/modules/services/backup/znapzend.nix
index 8098617d11f3..0ca71b413cee 100644
--- a/nixpkgs/nixos/modules/services/backup/znapzend.nix
+++ b/nixpkgs/nixos/modules/services/backup/znapzend.nix
@@ -220,7 +220,7 @@ let
       };
 
       destinations = mkOption {
-        type = loaOf (destType config);
+        type = attrsOf (destType config);
         description = "Additional destinations.";
         default = {};
         example = literalExample ''
@@ -328,7 +328,7 @@ in
       };
 
       zetup = mkOption {
-        type = loaOf srcType;
+        type = attrsOf srcType;
         description = "Znapzend configuration.";
         default = {};
         example = literalExample ''
diff --git a/nixpkgs/nixos/modules/services/cluster/kubernetes/pki.nix b/nixpkgs/nixos/modules/services/cluster/kubernetes/pki.nix
index 4275563f1a36..933ae481e968 100644
--- a/nixpkgs/nixos/modules/services/cluster/kubernetes/pki.nix
+++ b/nixpkgs/nixos/modules/services/cluster/kubernetes/pki.nix
@@ -20,7 +20,7 @@ let
         size = 2048;
     };
     CN = top.masterAddress;
-    hosts = cfg.cfsslAPIExtraSANs;
+    hosts = [top.masterAddress] ++ cfg.cfsslAPIExtraSANs;
   });
 
   cfsslAPITokenBaseName = "apitoken.secret";
@@ -228,7 +228,8 @@ in
             };
             private_key = cert.privateKeyOptions;
             request = {
-              inherit (cert) CN hosts;
+              hosts = [cert.CN] ++ cert.hosts;
+              inherit (cert) CN;
               key = {
                 algo = "rsa";
                 size = 2048;
diff --git a/nixpkgs/nixos/modules/services/computing/slurm/slurm.nix b/nixpkgs/nixos/modules/services/computing/slurm/slurm.nix
index 050872e933fb..705390a21d4e 100644
--- a/nixpkgs/nixos/modules/services/computing/slurm/slurm.nix
+++ b/nixpkgs/nixos/modules/services/computing/slurm/slurm.nix
@@ -67,7 +67,7 @@ in
           type = types.bool;
           default = false;
           description = ''
-            Wether to enable the slurm control daemon.
+            Whether to enable the slurm control daemon.
             Note that the standard authentication method is "munge".
             The "munge" service needs to be provided with a password file in order for
             slurm to work properly (see <literal>services.munge.password</literal>).
@@ -135,7 +135,7 @@ in
         type = types.bool;
         default = false;
         description = ''
-          Wether to provide a slurm.conf file.
+          Whether to provide a slurm.conf file.
           Enable this option if you do not run a slurm daemon on this host
           (i.e. <literal>server.enable</literal> and <literal>client.enable</literal> are <literal>false</literal>)
           but you still want to run slurm commands from this host.
diff --git a/nixpkgs/nixos/modules/services/computing/torque/mom.nix b/nixpkgs/nixos/modules/services/computing/torque/mom.nix
index 83772539a7ab..0c5f43cf3e6a 100644
--- a/nixpkgs/nixos/modules/services/computing/torque/mom.nix
+++ b/nixpkgs/nixos/modules/services/computing/torque/mom.nix
@@ -60,4 +60,4 @@ in
     };
 
   };
-}      
+}
diff --git a/nixpkgs/nixos/modules/services/computing/torque/server.nix b/nixpkgs/nixos/modules/services/computing/torque/server.nix
index 655d1500497e..21c5a4f46724 100644
--- a/nixpkgs/nixos/modules/services/computing/torque/server.nix
+++ b/nixpkgs/nixos/modules/services/computing/torque/server.nix
@@ -93,4 +93,4 @@ in
     };
 
   };
-}      
+}
diff --git a/nixpkgs/nixos/modules/services/continuous-integration/buildbot/master.nix b/nixpkgs/nixos/modules/services/continuous-integration/buildbot/master.nix
index 0185f490b0c2..e1950b91382b 100644
--- a/nixpkgs/nixos/modules/services/continuous-integration/buildbot/master.nix
+++ b/nixpkgs/nixos/modules/services/continuous-integration/buildbot/master.nix
@@ -25,7 +25,7 @@ let
      change_source = [ ${concatStringsSep "," cfg.changeSource} ],
      schedulers    = [ ${concatStringsSep "," cfg.schedulers} ],
      builders      = [ ${concatStringsSep "," cfg.builders} ],
-     status        = [ ${concatStringsSep "," cfg.status} ],
+     services      = [ ${concatStringsSep "," cfg.reporters} ],
     )
     for step in [ ${concatStringsSep "," cfg.factorySteps} ]:
       factory.addStep(step)
@@ -119,10 +119,10 @@ in {
         default = [ "worker.Worker('example-worker', 'pass')" ];
       };
 
-      status = mkOption {
+      reporters = mkOption {
         default = [];
         type = types.listOf types.str;
-        description = "List of status notification endpoints.";
+        description = "List of reporter objects used to present build status to various users.";
       };
 
       user = mkOption {
@@ -276,6 +276,10 @@ in {
 
   imports = [
     (mkRenamedOptionModule [ "services" "buildbot-master" "bpPort" ] [ "services" "buildbot-master" "pbPort" ])
+    (mkRemovedOptionModule [ "services" "buildbot-master" "status" ] ''
+      Since Buildbot 0.9.0, status targets are deprecated and ignored.
+      Review your configuration and migrate to reporters (available at services.buildbot-master.reporters).
+    '')
   ];
 
   meta.maintainers = with lib.maintainers; [ nand0p mic92 ];
diff --git a/nixpkgs/nixos/modules/services/continuous-integration/buildbot/worker.nix b/nixpkgs/nixos/modules/services/continuous-integration/buildbot/worker.nix
index 52f24b8cee3c..7b8a35f54bfa 100644
--- a/nixpkgs/nixos/modules/services/continuous-integration/buildbot/worker.nix
+++ b/nixpkgs/nixos/modules/services/continuous-integration/buildbot/worker.nix
@@ -29,7 +29,7 @@ let
 
     with open('${cfg.workerPassFile}', 'r', encoding='utf-8') as passwd_file:
         passwd = passwd_file.read().strip('\r\n')
-    keepalive = 600
+    keepalive = ${toString cfg.keepalive}
     umask = None
     maxdelay = 300
     numcpus = None
@@ -116,6 +116,15 @@ in {
         description = "Specifies the Buildbot Worker connection string.";
       };
 
+      keepalive = mkOption {
+        default = 600;
+        type = types.int;
+        description = "
+          This is a number that indicates how frequently keepalive messages should be sent
+          from the worker to the buildmaster, expressed in seconds.
+        ";
+      };
+
       package = mkOption {
         type = types.package;
         default = pkgs.python3Packages.buildbot-worker;
diff --git a/nixpkgs/nixos/modules/services/continuous-integration/gitlab-runner.nix b/nixpkgs/nixos/modules/services/continuous-integration/gitlab-runner.nix
index eacfed85ddff..431555309cc9 100644
--- a/nixpkgs/nixos/modules/services/continuous-integration/gitlab-runner.nix
+++ b/nixpkgs/nixos/modules/services/continuous-integration/gitlab-runner.nix
@@ -1,14 +1,16 @@
 { config, lib, pkgs, ... }:
+with builtins;
 with lib;
 let
   cfg = config.services.gitlab-runner;
   hasDocker = config.virtualisation.docker.enable;
-  hashedServices = with builtins; (mapAttrs' (name: service: nameValuePair
-    "${name}_${config.networking.hostName}_${
+  hashedServices = mapAttrs'
+    (name: service: nameValuePair
+      "${name}_${config.networking.hostName}_${
         substring 0 12
         (hashString "md5" (unsafeDiscardStringContext (toJSON service)))}"
       service)
-    cfg.services);
+    cfg.services;
   configPath = "$HOME/.gitlab-runner/config.toml";
   configureScript = pkgs.writeShellScriptBin "gitlab-runner-configure" (
     if (cfg.configFile != null) then ''
@@ -47,6 +49,8 @@ let
           ] ++ service.registrationFlags
             ++ optional (service.buildsDir != null)
             "--builds-dir ${service.buildsDir}"
+            ++ optional (service.cloneUrl != null)
+            "--clone-url ${service.cloneUrl}"
             ++ optional (service.preCloneScript != null)
             "--pre-clone-script ${service.preCloneScript}"
             ++ optional (service.preBuildScript != null)
@@ -76,7 +80,7 @@ let
               ++ map (v: "--docker-allowed-images ${escapeShellArg v}") service.dockerAllowedImages
               ++ map (v: "--docker-allowed-services ${escapeShellArg v}") service.dockerAllowedServices
             )
-          ))} && sleep 1
+          ))} && sleep 1 || exit 1
         fi
       '') hashedServices)}
 
@@ -89,8 +93,17 @@ let
 
       # update global options
       remarshal --if toml --of json ${configPath} \
-        | jq -cM '.check_interval = ${toString cfg.checkInterval} |
-                  .concurrent = ${toString cfg.concurrent}' \
+        | jq -cM ${escapeShellArg (concatStringsSep " | " [
+            ".check_interval = ${toJSON cfg.checkInterval}"
+            ".concurrent = ${toJSON cfg.concurrent}"
+            ".sentry_dsn = ${toJSON cfg.sentryDSN}"
+            ".listen_address = ${toJSON cfg.prometheusListenAddress}"
+            ".session_server.listen_address = ${toJSON cfg.sessionServer.listenAddress}"
+            ".session_server.advertise_address = ${toJSON cfg.sessionServer.advertiseAddress}"
+            ".session_server.session_timeout = ${toJSON cfg.sessionServer.sessionTimeout}"
+            "del(.[] | nulls)"
+            "del(.session_server[] | nulls)"
+          ])} \
         | remarshal --if json --of toml \
         | sponge ${configPath}
 
@@ -141,6 +154,66 @@ in
         0 does not mean unlimited.
       '';
     };
+    sentryDSN = mkOption {
+      type = types.nullOr types.str;
+      default = null;
+      example = "https://public:private@host:port/1";
+      description = ''
+        Data Source Name for tracking of all system level errors to Sentry.
+      '';
+    };
+    prometheusListenAddress = mkOption {
+      type = types.nullOr types.str;
+      default = null;
+      example = "localhost:8080";
+      description = ''
+        Address (&lt;host&gt;:&lt;port&gt;) on which the Prometheus metrics HTTP server
+        should be listening.
+      '';
+    };
+    sessionServer = mkOption {
+      type = types.submodule {
+        options = {
+          listenAddress = mkOption {
+            type = types.nullOr types.str;
+            default = null;
+            example = "0.0.0.0:8093";
+            description = ''
+              An internal URL to be used for the session server.
+            '';
+          };
+          advertiseAddress = mkOption {
+            type = types.nullOr types.str;
+            default = null;
+            example = "runner-host-name.tld:8093";
+            description = ''
+              The URL that the Runner will expose to GitLab to be used
+              to access the session server.
+              Fallbacks to <option>listenAddress</option> if not defined.
+            '';
+          };
+          sessionTimeout = mkOption {
+            type = types.int;
+            default = 1800;
+            description = ''
+              How long in seconds the session can stay active after
+              the job completes (which will block the job from finishing).
+            '';
+          };
+        };
+      };
+      default = { };
+      example = literalExample ''
+        {
+          listenAddress = "0.0.0.0:8093";
+        }
+      '';
+      description = ''
+        The session server allows the user to interact with jobs
+        that the Runner is responsible for. A good example of this is the
+        <link xlink:href="https://docs.gitlab.com/ee/ci/interactive_web_terminal/index.html">interactive web terminal</link>.
+      '';
+    };
     gracefulTermination = mkOption {
       type = types.bool;
       default = false;
@@ -306,6 +379,14 @@ in
               in context of selected executor (Locally, Docker, SSH).
             '';
           };
+          cloneUrl = mkOption {
+            type = types.nullOr types.str;
+            default = null;
+            example = "http://gitlab.example.local";
+            description = ''
+              Overwrite the URL for the GitLab instance. Used if the Runner can’t connect to GitLab on the URL GitLab exposes itself.
+            '';
+          };
           dockerImage = mkOption {
             type = types.nullOr types.str;
             default = null;
diff --git a/nixpkgs/nixos/modules/services/continuous-integration/hercules-ci-agent/common.nix b/nixpkgs/nixos/modules/services/continuous-integration/hercules-ci-agent/common.nix
new file mode 100644
index 000000000000..4aed493c0fb0
--- /dev/null
+++ b/nixpkgs/nixos/modules/services/continuous-integration/hercules-ci-agent/common.nix
@@ -0,0 +1,213 @@
+/*
+
+This file is for options that NixOS and nix-darwin have in common.
+
+Platform-specific code is in the respective default.nix files.
+
+ */
+
+{ config, lib, options, pkgs, ... }:
+
+let
+  inherit (lib) mkOption mkIf types filterAttrs literalExample mkRenamedOptionModule;
+
+  cfg =
+    config.services.hercules-ci-agent;
+
+  format = pkgs.formats.toml {};
+
+  settingsModule = { config, ... }: {
+    freeformType = format.type;
+    options = {
+      baseDirectory = mkOption {
+        type = types.path;
+        default = "/var/lib/hercules-ci-agent";
+        description = ''
+          State directory (secrets, work directory, etc) for agent
+        '';
+      };
+      concurrentTasks = mkOption {
+        description = ''
+          Number of tasks to perform simultaneously, such as evaluations, derivations.
+
+          You must have a total capacity across agents of at least 2 concurrent tasks on <literal>x86_64-linux</literal>
+          to allow for import from derivation.
+        '';
+        type = types.int;
+        default = 4;
+      };
+      workDirectory = mkOption {
+        description = ''
+          The directory in which temporary subdirectories are created for task state. This includes sources for Nix evaluation.
+        '';
+        type = types.path;
+        default = config.baseDirectory + "/work";
+        defaultText = literalExample ''baseDirectory + "/work"'';
+      };
+      staticSecretsDirectory = mkOption {
+        description = ''
+          This is the default directory to look for statically configured secrets like <literal>cluster-join-token.key</literal>.
+        '';
+        type = types.path;
+        default = config.baseDirectory + "/secrets";
+        defaultText = literalExample ''baseDirectory + "/secrets"'';
+      };
+      clusterJoinTokenPath = mkOption {
+        description = ''
+          Location of the cluster-join-token.key file.
+        '';
+        type = types.path;
+        default = config.staticSecretsDirectory + "/cluster-join-token.key";
+        defaultText = literalExample ''staticSecretsDirectory + "/cluster-join-token.key"'';
+        # internal: It's a bit too detailed to show by default in the docs,
+        # but useful to define explicitly to allow reuse by other modules.
+        internal = true;
+      };
+      binaryCachesPath = mkOption {
+        description = ''
+          Location of the binary-caches.json file.
+        '';
+        type = types.path;
+        default = config.staticSecretsDirectory + "/binary-caches.json";
+        defaultText = literalExample ''staticSecretsDirectory + "/binary-caches.json"'';
+        # internal: It's a bit too detailed to show by default in the docs,
+        # but useful to define explicitly to allow reuse by other modules.
+        internal = true;
+      };
+    };
+  };
+
+  checkNix =
+    if !cfg.checkNix
+    then ""
+    else if lib.versionAtLeast config.nix.package.version "2.4.0"
+    then ""
+    else pkgs.stdenv.mkDerivation {
+      name = "hercules-ci-check-system-nix-src";
+      inherit (config.nix.package) src patches;
+      configurePhase = ":";
+      buildPhase = ''
+        echo "Checking in-memory pathInfoCache expiry"
+        if ! grep 'struct PathInfoCacheValue' src/libstore/store-api.hh >/dev/null; then
+          cat 1>&2 <<EOF
+
+          You are deploying Hercules CI Agent on a system with an incompatible
+          nix-daemon. Please
+           - either upgrade Nix to version 2.4.0 (when released),
+           - or set option services.hercules-ci-agent.patchNix = true;
+           - or set option nix.package to a build of Nix 2.3 with this patch applied:
+               https://github.com/NixOS/nix/pull/3405
+
+          The patch is required for Nix-daemon clients that expect a change in binary
+          cache contents while running, like the agent's evaluator. Without it, import
+          from derivation will fail if your cluster has more than one machine.
+          We are conservative with changes to the overall system, which is why we
+          keep changes to a minimum and why we ask for confirmation in the form of
+          services.hercules-ci-agent.patchNix = true before applying.
+
+        EOF
+          exit 1
+        fi
+      '';
+      installPhase = "touch $out";
+    };
+
+  patchedNix = lib.mkIf (!lib.versionAtLeast pkgs.nix.version "2.4.0") (
+    if lib.versionAtLeast pkgs.nix.version "2.4pre"
+    then lib.warn "Hercules CI Agent module will not patch 2.4 pre-release. Make sure it includes (equivalently) PR #3043, commit d048577909 or is no older than 2020-03-13." pkgs.nix
+    else pkgs.nix.overrideAttrs (
+      o: {
+        patches = (o.patches or []) ++ [ backportNix3398 ];
+      }
+    )
+  );
+
+  backportNix3398 = pkgs.fetchurl {
+    url = "https://raw.githubusercontent.com/hercules-ci/hercules-ci-agent/hercules-ci-agent-0.7.3/for-upstream/issue-3398-path-info-cache-ttls-backport-2.3.patch";
+    sha256 = "0jfckqjir9il2il7904yc1qyadw366y7xqzg81sp9sl3f1pw70ib";
+  };
+in
+{
+  imports = [
+    (mkRenamedOptionModule ["services" "hercules-ci-agent" "extraOptions"] ["services" "hercules-ci-agent" "settings"])
+    (mkRenamedOptionModule ["services" "hercules-ci-agent" "baseDirectory"] ["services" "hercules-ci-agent" "settings" "baseDirectory"])
+    (mkRenamedOptionModule ["services" "hercules-ci-agent" "concurrentTasks"] ["services" "hercules-ci-agent" "settings" "concurrentTasks"])
+  ];
+
+  options.services.hercules-ci-agent = {
+    enable = mkOption {
+      type = types.bool;
+      default = false;
+      description = ''
+        Enable to run Hercules CI Agent as a system service.
+
+        <link xlink:href="https://hercules-ci.com">Hercules CI</link> is a
+        continuous integation service that is centered around Nix.
+
+        Support is available at <link xlink:href="mailto:help@hercules-ci.com">help@hercules-ci.com</link>.
+      '';
+    };
+    patchNix = mkOption {
+      type = types.bool;
+      default = false;
+      description = ''
+        Fix Nix 2.3 cache path metadata caching behavior. Has the effect of <literal>nix.package = patch pkgs.nix;</literal>
+
+        This option will be removed when Hercules CI Agent moves to Nix 2.4 (upcoming Nix release).
+      '';
+    };
+    checkNix = mkOption {
+      type = types.bool;
+      default = true;
+      description = ''
+        Whether to make sure that the system's Nix (nix-daemon) is compatible.
+
+        If you set this to false, please keep up with the change log.
+      '';
+    };
+    package = mkOption {
+      description = ''
+        Package containing the bin/hercules-ci-agent executable.
+      '';
+      type = types.package;
+      default = pkgs.hercules-ci-agent;
+      defaultText = literalExample "pkgs.hercules-ci-agent";
+    };
+    settings = mkOption {
+      description = ''
+        These settings are written to the <literal>agent.toml</literal> file.
+
+        Not all settings are listed as options, can be set nonetheless.
+
+        For the exhaustive list of settings, see <link xlink:href="https://docs.hercules-ci.com/hercules-ci/reference/agent-config/"/>.
+      '';
+      type = types.submoduleWith { modules = [ settingsModule ]; };
+    };
+
+    /*
+      Internal and/or computed values.
+
+      These are written as options instead of let binding to allow sharing with
+      default.nix on both NixOS and nix-darwin.
+     */
+    tomlFile = mkOption {
+      type = types.path;
+      internal = true;
+      defaultText = "generated hercules-ci-agent.toml";
+      description = ''
+        The fully assembled config file.
+      '';
+    };
+  };
+
+  config = mkIf cfg.enable {
+    nix.extraOptions = lib.addContextFrom checkNix ''
+      # A store path that was missing at first may well have finished building,
+      # even shortly after the previous lookup. This *also* applies to the daemon.
+      narinfo-cache-negative-ttl = 0
+    '';
+    nix.package = mkIf cfg.patchNix patchedNix;
+    services.hercules-ci-agent.tomlFile =
+      format.generate "hercules-ci-agent.toml" cfg.settings;
+  };
+}
diff --git a/nixpkgs/nixos/modules/services/continuous-integration/hercules-ci-agent/default.nix b/nixpkgs/nixos/modules/services/continuous-integration/hercules-ci-agent/default.nix
new file mode 100644
index 000000000000..d2e7e8e18f94
--- /dev/null
+++ b/nixpkgs/nixos/modules/services/continuous-integration/hercules-ci-agent/default.nix
@@ -0,0 +1,86 @@
+/*
+
+This file is for NixOS-specific options and configs.
+
+Code that is shared with nix-darwin goes in common.nix.
+
+ */
+
+{ pkgs, config, lib, ... }:
+
+let
+
+  inherit (lib) mkIf mkDefault;
+
+  cfg = config.services.hercules-ci-agent;
+
+  command = "${cfg.package}/bin/hercules-ci-agent --config ${cfg.tomlFile}";
+  testCommand = "${command} --test-configuration";
+
+in
+{
+  imports = [
+    ./common.nix
+    (lib.mkRenamedOptionModule ["services" "hercules-ci-agent" "user"] ["systemd" "services" "hercules-ci-agent" "serviceConfig" "User"])
+  ];
+
+  config = mkIf cfg.enable {
+
+    systemd.services.hercules-ci-agent = {
+      wantedBy = [ "multi-user.target" ];
+      after = [ "network-online.target" ];
+      wants = [ "network-online.target" ];
+      path = [ config.nix.package ];
+      serviceConfig = {
+        User = "hercules-ci-agent";
+        ExecStart = command;
+        ExecStartPre = testCommand;
+        Restart = "on-failure";
+        RestartSec = 120;
+        StartLimitBurst = 30 * 1000000; # practically infinite
+      };
+    };
+
+    # Changes in the secrets do not affect the unit in any way that would cause
+    # a restart, which is currently necessary to reload the secrets.
+    systemd.paths.hercules-ci-agent-restart-files = {
+      wantedBy = [ "hercules-ci-agent.service" ];
+      pathConfig = {
+        Unit = "hercules-ci-agent-restarter.service";
+        PathChanged = [ cfg.settings.clusterJoinTokenPath cfg.settings.binaryCachesPath ];
+      };
+    };
+    systemd.services.hercules-ci-agent-restarter = {
+      serviceConfig.Type = "oneshot";
+      script = ''
+        # Wait a bit, with the effect of bundling up file changes into a single
+        # run of this script and hopefully a single restart.
+        sleep 10
+        if systemctl is-active --quiet hercules-ci-agent.service; then
+          if ${testCommand}; then
+            systemctl restart hercules-ci-agent.service
+          else
+            echo 1>&2 "WARNING: Not restarting agent because config is not valid at this time."
+          fi
+        else
+          echo 1>&2 "Not restarting hercules-ci-agent despite config file update, because it is not already active."
+        fi
+      '';
+    };
+
+    # Trusted user allows simplified configuration and better performance
+    # when operating in a cluster.
+    nix.trustedUsers = [ config.systemd.services.hercules-ci-agent.serviceConfig.User ];
+    services.hercules-ci-agent.settings.nixUserIsTrusted = true;
+
+    users.users.hercules-ci-agent = {
+      home = cfg.settings.baseDirectory;
+      createHome = true;
+      group = "hercules-ci-agent";
+      description = "Hercules CI Agent system user";
+      isSystemUser = true;
+    };
+
+    users.groups.hercules-ci-agent = {};
+  };
+}
diff --git a/nixpkgs/nixos/modules/services/databases/couchdb.nix b/nixpkgs/nixos/modules/services/databases/couchdb.nix
index 53224db1d896..f385331e8782 100644
--- a/nixpkgs/nixos/modules/services/databases/couchdb.nix
+++ b/nixpkgs/nixos/modules/services/databases/couchdb.nix
@@ -11,7 +11,13 @@ let
       database_dir = ${cfg.databaseDir}
       uri_file = ${cfg.uriFile}
       view_index_dir = ${cfg.viewIndexDir}
-    '' + (if useVersion2 then
+    '' + (if cfg.adminPass != null then
+    ''
+      [admins]
+      ${cfg.adminUser} = ${cfg.adminPass}
+    '' else
+    ''
+    '') + (if useVersion2 then
     ''
       [chttpd]
     '' else
@@ -54,6 +60,23 @@ in {
         '';
       };
 
+      adminUser = mkOption {
+        type = types.str;
+        default = "admin";
+        description = ''
+          Couchdb (i.e. fauxton) account with permission for all dbs and
+          tasks.
+        '';
+      };
+
+      adminPass = mkOption {
+        type = types.nullOr types.str;
+        default = null;
+        description = ''
+          Couchdb (i.e. fauxton) account with permission for all dbs and
+          tasks.
+        '';
+      };
 
       user = mkOption {
         type = types.str;
diff --git a/nixpkgs/nixos/modules/services/databases/mysql.nix b/nixpkgs/nixos/modules/services/databases/mysql.nix
index 2e8c5b7640b2..7d0a3f9afc48 100644
--- a/nixpkgs/nixos/modules/services/databases/mysql.nix
+++ b/nixpkgs/nixos/modules/services/databases/mysql.nix
@@ -6,12 +6,10 @@ let
 
   cfg = config.services.mysql;
 
-  mysql = cfg.package;
-
-  isMariaDB = lib.getName mysql == lib.getName pkgs.mariadb;
+  isMariaDB = lib.getName cfg.package == lib.getName pkgs.mariadb;
 
   mysqldOptions =
-    "--user=${cfg.user} --datadir=${cfg.dataDir} --basedir=${mysql}";
+    "--user=${cfg.user} --datadir=${cfg.dataDir} --basedir=${cfg.package}";
 
   settingsFile = pkgs.writeText "my.cnf" (
     generators.toINI { listsAsDuplicateKeys = true; } cfg.settings +
@@ -22,7 +20,7 @@ in
 
 {
   imports = [
-    (mkRemovedOptionModule [ "services" "mysql" "pidDir" ] "Don't wait for pidfiles, describe dependencies through systemd")
+    (mkRemovedOptionModule [ "services" "mysql" "pidDir" ] "Don't wait for pidfiles, describe dependencies through systemd.")
     (mkRemovedOptionModule [ "services" "mysql" "rootPassword" ] "Use socket authentication or set the password outside of the nix store.")
   ];
 
@@ -46,25 +44,31 @@ in
         type = types.nullOr types.str;
         default = null;
         example = literalExample "0.0.0.0";
-        description = "Address to bind to. The default is to bind to all addresses";
+        description = "Address to bind to. The default is to bind to all addresses.";
       };
 
       port = mkOption {
         type = types.int;
         default = 3306;
-        description = "Port of MySQL";
+        description = "Port of MySQL.";
       };
 
       user = mkOption {
         type = types.str;
         default = "mysql";
-        description = "User account under which MySQL runs";
+        description = "User account under which MySQL runs.";
+      };
+
+      group = mkOption {
+        type = types.str;
+        default = "mysql";
+        description = "Group under which MySQL runs.";
       };
 
       dataDir = mkOption {
         type = types.path;
         example = "/var/lib/mysql";
-        description = "Location where MySQL stores its table files";
+        description = "Location where MySQL stores its table files.";
       };
 
       configFile = mkOption {
@@ -171,7 +175,7 @@ in
       initialScript = mkOption {
         type = types.nullOr types.path;
         default = null;
-        description = "A file containing SQL statements to be executed on the first startup. Can be used for granting certain permissions on the database";
+        description = "A file containing SQL statements to be executed on the first startup. Can be used for granting certain permissions on the database.";
       };
 
       ensureDatabases = mkOption {
@@ -259,33 +263,33 @@ in
         serverId = mkOption {
           type = types.int;
           default = 1;
-          description = "Id of the MySQL server instance. This number must be unique for each instance";
+          description = "Id of the MySQL server instance. This number must be unique for each instance.";
         };
 
         masterHost = mkOption {
           type = types.str;
-          description = "Hostname of the MySQL master server";
+          description = "Hostname of the MySQL master server.";
         };
 
         slaveHost = mkOption {
           type = types.str;
-          description = "Hostname of the MySQL slave server";
+          description = "Hostname of the MySQL slave server.";
         };
 
         masterUser = mkOption {
           type = types.str;
-          description = "Username of the MySQL replication user";
+          description = "Username of the MySQL replication user.";
         };
 
         masterPassword = mkOption {
           type = types.str;
-          description = "Password of the MySQL replication user";
+          description = "Password of the MySQL replication user.";
         };
 
         masterPort = mkOption {
           type = types.int;
           default = 3306;
-          description = "Port number on which the MySQL master server runs";
+          description = "Port number on which the MySQL master server runs.";
         };
       };
     };
@@ -317,29 +321,33 @@ in
         binlog-ignore-db = [ "information_schema" "performance_schema" "mysql" ];
       })
       (mkIf (!isMariaDB) {
-        plugin-load-add = optional (cfg.ensureUsers != []) "auth_socket.so";
+        plugin-load-add = "auth_socket.so";
       })
     ];
 
-    users.users.mysql = {
-      description = "MySQL server user";
-      group = "mysql";
-      uid = config.ids.uids.mysql;
+    users.users = optionalAttrs (cfg.user == "mysql") {
+      mysql = {
+        description = "MySQL server user";
+        group = cfg.group;
+        uid = config.ids.uids.mysql;
+      };
     };
 
-    users.groups.mysql.gid = config.ids.gids.mysql;
+    users.groups = optionalAttrs (cfg.group == "mysql") {
+      mysql.gid = config.ids.gids.mysql;
+    };
 
-    environment.systemPackages = [mysql];
+    environment.systemPackages = [ cfg.package ];
 
     environment.etc."my.cnf".source = cfg.configFile;
 
     systemd.tmpfiles.rules = [
-      "d '${cfg.dataDir}' 0700 ${cfg.user} mysql - -"
-      "z '${cfg.dataDir}' 0700 ${cfg.user} mysql - -"
+      "d '${cfg.dataDir}' 0700 '${cfg.user}' '${cfg.group}' - -"
+      "z '${cfg.dataDir}' 0700 '${cfg.user}' '${cfg.group}' - -"
     ];
 
     systemd.services.mysql = let
-      hasNotify = (cfg.package == pkgs.mariadb);
+      hasNotify = isMariaDB;
     in {
         description = "MySQL Server";
 
@@ -357,125 +365,127 @@ in
 
         preStart = if isMariaDB then ''
           if ! test -e ${cfg.dataDir}/mysql; then
-            ${mysql}/bin/mysql_install_db --defaults-file=/etc/my.cnf ${mysqldOptions}
+            ${cfg.package}/bin/mysql_install_db --defaults-file=/etc/my.cnf ${mysqldOptions}
             touch ${cfg.dataDir}/mysql_init
           fi
         '' else ''
           if ! test -e ${cfg.dataDir}/mysql; then
-            ${mysql}/bin/mysqld --defaults-file=/etc/my.cnf ${mysqldOptions} --initialize-insecure
+            ${cfg.package}/bin/mysqld --defaults-file=/etc/my.cnf ${mysqldOptions} --initialize-insecure
             touch ${cfg.dataDir}/mysql_init
           fi
         '';
 
-        serviceConfig = {
-          Type = if hasNotify then "notify" else "simple";
-          Restart = "on-abort";
-          RestartSec = "5s";
-          # The last two environment variables are used for starting Galera clusters
-          ExecStart = "${mysql}/bin/mysqld --defaults-file=/etc/my.cnf ${mysqldOptions} $_WSREP_NEW_CLUSTER $_WSREP_START_POSITION";
-          ExecStartPost =
-            let
-              setupScript = pkgs.writeScript "mysql-setup" ''
-                #!${pkgs.runtimeShell} -e
-
-                ${optionalString (!hasNotify) ''
-                  # Wait until the MySQL server is available for use
-                  count=0
-                  while [ ! -e /run/mysqld/mysqld.sock ]
-                  do
-                      if [ $count -eq 30 ]
-                      then
-                          echo "Tried 30 times, giving up..."
-                          exit 1
-                      fi
-
-                      echo "MySQL daemon not yet started. Waiting for 1 second..."
-                      count=$((count++))
-                      sleep 1
-                  done
-                ''}
-
-                if [ -f ${cfg.dataDir}/mysql_init ]
+        postStart = let
+          # The super user account to use on *first* run of MySQL server
+          superUser = if isMariaDB then cfg.user else "root";
+        in ''
+          ${optionalString (!hasNotify) ''
+            # Wait until the MySQL server is available for use
+            count=0
+            while [ ! -e /run/mysqld/mysqld.sock ]
+            do
+                if [ $count -eq 30 ]
                 then
-                    ${concatMapStrings (database: ''
-                      # Create initial databases
-                      if ! test -e "${cfg.dataDir}/${database.name}"; then
-                          echo "Creating initial database: ${database.name}"
-                          ( echo 'create database `${database.name}`;'
-
-                            ${optionalString (database.schema != null) ''
-                            echo 'use `${database.name}`;'
-
-                            # TODO: this silently falls through if database.schema does not exist,
-                            # we should catch this somehow and exit, but can't do it here because we're in a subshell.
-                            if [ -f "${database.schema}" ]
-                            then
-                                cat ${database.schema}
-                            elif [ -d "${database.schema}" ]
-                            then
-                                cat ${database.schema}/mysql-databases/*.sql
-                            fi
-                            ''}
-                          ) | ${mysql}/bin/mysql -u root -N
-                      fi
-                    '') cfg.initialDatabases}
-
-                    ${optionalString (cfg.replication.role == "master")
-                      ''
-                        # Set up the replication master
+                    echo "Tried 30 times, giving up..."
+                    exit 1
+                fi
 
-                        ( echo "use mysql;"
-                          echo "CREATE USER '${cfg.replication.masterUser}'@'${cfg.replication.slaveHost}' IDENTIFIED WITH mysql_native_password;"
-                          echo "SET PASSWORD FOR '${cfg.replication.masterUser}'@'${cfg.replication.slaveHost}' = PASSWORD('${cfg.replication.masterPassword}');"
-                          echo "GRANT REPLICATION SLAVE ON *.* TO '${cfg.replication.masterUser}'@'${cfg.replication.slaveHost}';"
-                        ) | ${mysql}/bin/mysql -u root -N
+                echo "MySQL daemon not yet started. Waiting for 1 second..."
+                count=$((count++))
+                sleep 1
+            done
+          ''}
+
+          if [ -f ${cfg.dataDir}/mysql_init ]
+          then
+              # While MariaDB comes with a 'mysql' super user account since 10.4.x, MySQL does not
+              # Since we don't want to run this service as 'root' we need to ensure the account exists on first run
+              ( echo "CREATE USER IF NOT EXISTS '${cfg.user}'@'localhost' IDENTIFIED WITH ${if isMariaDB then "unix_socket" else "auth_socket"};"
+                echo "GRANT ALL PRIVILEGES ON *.* TO '${cfg.user}'@'localhost' WITH GRANT OPTION;"
+              ) | ${cfg.package}/bin/mysql -u ${superUser} -N
+
+              ${concatMapStrings (database: ''
+                # Create initial databases
+                if ! test -e "${cfg.dataDir}/${database.name}"; then
+                    echo "Creating initial database: ${database.name}"
+                    ( echo 'create database `${database.name}`;'
+
+                      ${optionalString (database.schema != null) ''
+                      echo 'use `${database.name}`;'
+
+                      # TODO: this silently falls through if database.schema does not exist,
+                      # we should catch this somehow and exit, but can't do it here because we're in a subshell.
+                      if [ -f "${database.schema}" ]
+                      then
+                          cat ${database.schema}
+                      elif [ -d "${database.schema}" ]
+                      then
+                          cat ${database.schema}/mysql-databases/*.sql
+                      fi
                       ''}
+                    ) | ${cfg.package}/bin/mysql -u ${superUser} -N
+                fi
+              '') cfg.initialDatabases}
 
-                    ${optionalString (cfg.replication.role == "slave")
-                      ''
-                        # Set up the replication slave
+              ${optionalString (cfg.replication.role == "master")
+                ''
+                  # Set up the replication master
 
-                        ( echo "stop slave;"
-                          echo "change master to master_host='${cfg.replication.masterHost}', master_user='${cfg.replication.masterUser}', master_password='${cfg.replication.masterPassword}';"
-                          echo "start slave;"
-                        ) | ${mysql}/bin/mysql -u root -N
-                      ''}
+                  ( echo "use mysql;"
+                    echo "CREATE USER '${cfg.replication.masterUser}'@'${cfg.replication.slaveHost}' IDENTIFIED WITH mysql_native_password;"
+                    echo "SET PASSWORD FOR '${cfg.replication.masterUser}'@'${cfg.replication.slaveHost}' = PASSWORD('${cfg.replication.masterPassword}');"
+                    echo "GRANT REPLICATION SLAVE ON *.* TO '${cfg.replication.masterUser}'@'${cfg.replication.slaveHost}';"
+                  ) | ${cfg.package}/bin/mysql -u ${superUser} -N
+                ''}
 
-                    ${optionalString (cfg.initialScript != null)
-                      ''
-                        # Execute initial script
-                        # using toString to avoid copying the file to nix store if given as path instead of string,
-                        # as it might contain credentials
-                        cat ${toString cfg.initialScript} | ${mysql}/bin/mysql -u root -N
-                      ''}
+              ${optionalString (cfg.replication.role == "slave")
+                ''
+                  # Set up the replication slave
 
-                    rm ${cfg.dataDir}/mysql_init
-                fi
+                  ( echo "stop slave;"
+                    echo "change master to master_host='${cfg.replication.masterHost}', master_user='${cfg.replication.masterUser}', master_password='${cfg.replication.masterPassword}';"
+                    echo "start slave;"
+                  ) | ${cfg.package}/bin/mysql -u ${superUser} -N
+                ''}
 
-                ${optionalString (cfg.ensureDatabases != []) ''
-                  (
-                  ${concatMapStrings (database: ''
-                    echo "CREATE DATABASE IF NOT EXISTS \`${database}\`;"
-                  '') cfg.ensureDatabases}
-                  ) | ${mysql}/bin/mysql -u root -N
+              ${optionalString (cfg.initialScript != null)
+                ''
+                  # Execute initial script
+                  # using toString to avoid copying the file to nix store if given as path instead of string,
+                  # as it might contain credentials
+                  cat ${toString cfg.initialScript} | ${cfg.package}/bin/mysql -u ${superUser} -N
                 ''}
 
-                ${concatMapStrings (user:
-                  ''
-                    ( echo "CREATE USER IF NOT EXISTS '${user.name}'@'localhost' IDENTIFIED WITH ${if isMariaDB then "unix_socket" else "auth_socket"};"
-                      ${concatStringsSep "\n" (mapAttrsToList (database: permission: ''
-                        echo "GRANT ${permission} ON ${database} TO '${user.name}'@'localhost';"
-                      '') user.ensurePermissions)}
-                    ) | ${mysql}/bin/mysql -u root -N
-                  '') cfg.ensureUsers}
-              '';
-            in
-              # ensureDatbases & ensureUsers depends on this script being run as root
-              # when the user has secured their mysql install
-              "+${setupScript}";
+              rm ${cfg.dataDir}/mysql_init
+          fi
+
+          ${optionalString (cfg.ensureDatabases != []) ''
+            (
+            ${concatMapStrings (database: ''
+              echo "CREATE DATABASE IF NOT EXISTS \`${database}\`;"
+            '') cfg.ensureDatabases}
+            ) | ${cfg.package}/bin/mysql -N
+          ''}
+
+          ${concatMapStrings (user:
+            ''
+              ( echo "CREATE USER IF NOT EXISTS '${user.name}'@'localhost' IDENTIFIED WITH ${if isMariaDB then "unix_socket" else "auth_socket"};"
+                ${concatStringsSep "\n" (mapAttrsToList (database: permission: ''
+                  echo "GRANT ${permission} ON ${database} TO '${user.name}'@'localhost';"
+                '') user.ensurePermissions)}
+              ) | ${cfg.package}/bin/mysql -N
+            '') cfg.ensureUsers}
+        '';
+
+        serviceConfig = {
+          Type = if hasNotify then "notify" else "simple";
+          Restart = "on-abort";
+          RestartSec = "5s";
+          # The last two environment variables are used for starting Galera clusters
+          ExecStart = "${cfg.package}/bin/mysqld --defaults-file=/etc/my.cnf ${mysqldOptions} $_WSREP_NEW_CLUSTER $_WSREP_START_POSITION";
           # User and group
           User = cfg.user;
-          Group = "mysql";
+          Group = cfg.group;
           # Runtime directory and mode
           RuntimeDirectory = "mysqld";
           RuntimeDirectoryMode = "0755";
diff --git a/nixpkgs/nixos/modules/services/databases/openldap.nix b/nixpkgs/nixos/modules/services/databases/openldap.nix
index 9b4d9a98b745..7472538b887e 100644
--- a/nixpkgs/nixos/modules/services/databases/openldap.nix
+++ b/nixpkgs/nixos/modules/services/databases/openldap.nix
@@ -5,14 +5,14 @@ with lib;
 let
 
   cfg = config.services.openldap;
-  openldap = pkgs.openldap;
+  openldap = cfg.package;
 
   dataFile = pkgs.writeText "ldap-contents.ldif" cfg.declarativeContents;
   configFile = pkgs.writeText "slapd.conf" ((optionalString cfg.defaultSchemas ''
-    include ${pkgs.openldap.out}/etc/schema/core.schema
-    include ${pkgs.openldap.out}/etc/schema/cosine.schema
-    include ${pkgs.openldap.out}/etc/schema/inetorgperson.schema
-    include ${pkgs.openldap.out}/etc/schema/nis.schema
+    include ${openldap.out}/etc/schema/core.schema
+    include ${openldap.out}/etc/schema/cosine.schema
+    include ${openldap.out}/etc/schema/inetorgperson.schema
+    include ${openldap.out}/etc/schema/nis.schema
   '') + ''
     ${cfg.extraConfig}
     database ${cfg.database}
@@ -46,6 +46,18 @@ in
         ";
       };
 
+      package = mkOption {
+        type = types.package;
+        default = pkgs.openldap;
+        description = ''
+          OpenLDAP package to use.
+
+          This can be used to, for example, set an OpenLDAP package
+          with custom overrides to enable modules or other
+          functionality.
+        '';
+      };
+
       user = mkOption {
         type = types.str;
         default = "openldap";
@@ -152,10 +164,10 @@ in
         ";
         example = literalExample ''
             '''
-            include ${pkgs.openldap.out}/etc/schema/core.schema
-            include ${pkgs.openldap.out}/etc/schema/cosine.schema
-            include ${pkgs.openldap.out}/etc/schema/inetorgperson.schema
-            include ${pkgs.openldap.out}/etc/schema/nis.schema
+            include ${openldap.out}/etc/schema/core.schema
+            include ${openldap.out}/etc/schema/cosine.schema
+            include ${openldap.out}/etc/schema/inetorgperson.schema
+            include ${openldap.out}/etc/schema/nis.schema
 
             database bdb
             suffix dc=example,dc=org
diff --git a/nixpkgs/nixos/modules/services/databases/postgresql.nix b/nixpkgs/nixos/modules/services/databases/postgresql.nix
index 579b6a4d9c67..5056d50153f6 100644
--- a/nixpkgs/nixos/modules/services/databases/postgresql.nix
+++ b/nixpkgs/nixos/modules/services/databases/postgresql.nix
@@ -11,23 +11,23 @@ let
       then cfg.package
       else cfg.package.withPackages (_: cfg.extraPlugins);
 
+  toStr = value:
+    if true == value then "yes"
+    else if false == value then "no"
+    else if isString value then "'${lib.replaceStrings ["'"] ["''"] value}'"
+    else toString value;
+
   # The main PostgreSQL configuration file.
-  configFile = pkgs.writeText "postgresql.conf"
-    ''
-      hba_file = '${pkgs.writeText "pg_hba.conf" cfg.authentication}'
-      ident_file = '${pkgs.writeText "pg_ident.conf" cfg.identMap}'
-      log_destination = 'stderr'
-      log_line_prefix = '${cfg.logLinePrefix}'
-      listen_addresses = '${if cfg.enableTCPIP then "*" else "localhost"}'
-      port = ${toString cfg.port}
-      ${cfg.extraConfig}
-    ''; 
+  configFile = pkgs.writeText "postgresql.conf" (concatStringsSep "\n" (mapAttrsToList (n: v: "${n} = ${toStr v}") cfg.settings));
 
   groupAccessAvailable = versionAtLeast postgresql.version "11.0";
 
 in
 
 {
+  imports = [
+    (mkRemovedOptionModule [ "services" "postgresql" "extraConfig" ] "Use services.postgresql.settings instead.")
+  ];
 
   ###### interface
 
@@ -55,9 +55,13 @@ in
 
       dataDir = mkOption {
         type = types.path;
+        defaultText = "/var/lib/postgresql/\${config.services.postgresql.package.psqlSchema}";
         example = "/var/lib/postgresql/11";
         description = ''
-          Data directory for PostgreSQL.
+          The data directory for PostgreSQL. If left as the default value
+          this directory will automatically be created before the PostgreSQL server starts, otherwise
+          the sysadmin is responsible for ensuring the directory exists with appropriate ownership
+          and permissions.
         '';
       };
 
@@ -208,10 +212,28 @@ in
         '';
       };
 
-      extraConfig = mkOption {
-        type = types.lines;
-        default = "";
-        description = "Additional text to be appended to <filename>postgresql.conf</filename>.";
+      settings = mkOption {
+        type = with types; attrsOf (oneOf [ bool float int str ]);
+        default = {};
+        description = ''
+          PostgreSQL configuration. Refer to
+          <link xlink:href="https://www.postgresql.org/docs/11/config-setting.html#CONFIG-SETTING-CONFIGURATION-FILE"/>
+          for an overview of <literal>postgresql.conf</literal>.
+
+          <note><para>
+            String values will automatically be enclosed in single quotes. Single quotes will be
+            escaped with two single quotes as described by the upstream documentation linked above.
+          </para></note>
+        '';
+        example = literalExample ''
+          {
+            log_connections = true;
+            log_statement = "all";
+            logging_collector = true
+            log_disconnections = true
+            log_destination = lib.mkForce "syslog";
+          }
+        '';
       };
 
       recoveryConfig = mkOption {
@@ -221,14 +243,15 @@ in
           Contents of the <filename>recovery.conf</filename> file.
         '';
       };
+
       superUser = mkOption {
         type = types.str;
-        default= if versionAtLeast config.system.stateVersion "17.09" then "postgres" else "root";
+        default = "postgres";
         internal = true;
+        readOnly = true;
         description = ''
-          NixOS traditionally used 'root' as superuser, most other distros use 'postgres'.
-          From 17.09 we also try to follow this standard. Internal since changing this value
-          would lead to breakage while setting up databases.
+          PostgreSQL superuser account to use for various operations. Internal since changing
+          this value would lead to breakage while setting up databases.
         '';
         };
     };
@@ -240,6 +263,16 @@ in
 
   config = mkIf cfg.enable {
 
+    services.postgresql.settings =
+      {
+        hba_file = "${pkgs.writeText "pg_hba.conf" cfg.authentication}";
+        ident_file = "${pkgs.writeText "pg_ident.conf" cfg.identMap}";
+        log_destination = "stderr";
+        log_line_prefix = cfg.logLinePrefix;
+        listen_addresses = if cfg.enableTCPIP then "*" else "localhost";
+        port = cfg.port;
+      };
+
     services.postgresql.package =
       # Note: when changing the default, make it conditional on
       # ‘system.stateVersion’ to maintain compatibility with existing
@@ -249,10 +282,7 @@ in
             else if versionAtLeast config.system.stateVersion "16.03" then pkgs.postgresql_9_5
             else throw "postgresql_9_4 was removed, please upgrade your postgresql version.");
 
-    services.postgresql.dataDir =
-      mkDefault (if versionAtLeast config.system.stateVersion "17.09"
-                  then "/var/lib/postgresql/${cfg.package.psqlSchema}"
-                  else "/var/db/postgresql");
+    services.postgresql.dataDir = mkDefault "/var/lib/postgresql/${cfg.package.psqlSchema}";
 
     services.postgresql.authentication = mkAfter
       ''
@@ -291,59 +321,28 @@ in
 
         preStart =
           ''
-            # Create data directory.
             if ! test -e ${cfg.dataDir}/PG_VERSION; then
-              mkdir -m 0700 -p ${cfg.dataDir}
+              # Cleanup the data directory.
               rm -f ${cfg.dataDir}/*.conf
-              chown -R postgres:postgres ${cfg.dataDir}
-            fi
-          ''; # */
 
-        script =
-          ''
-            # Initialise the database.
-            if ! test -e ${cfg.dataDir}/PG_VERSION; then
+              # Initialise the database.
               initdb -U ${cfg.superUser} ${concatStringsSep " " cfg.initdbArgs}
+
               # See postStart!
               touch "${cfg.dataDir}/.first_startup"
             fi
+
             ln -sfn "${configFile}" "${cfg.dataDir}/postgresql.conf"
             ${optionalString (cfg.recoveryConfig != null) ''
               ln -sfn "${pkgs.writeText "recovery.conf" cfg.recoveryConfig}" \
                 "${cfg.dataDir}/recovery.conf"
             ''}
-            ${optionalString (!groupAccessAvailable) ''
-              # postgresql pre 11.0 doesn't start if state directory mode is group accessible
-              chmod 0700 "${cfg.dataDir}"
-            ''}
-
-            exec postgres
           '';
 
-        serviceConfig =
-          { ExecReload = "${pkgs.coreutils}/bin/kill -HUP $MAINPID";
-            User = "postgres";
-            Group = "postgres";
-            PermissionsStartOnly = true;
-            RuntimeDirectory = "postgresql";
-            Type = if versionAtLeast cfg.package.version "9.6"
-                   then "notify"
-                   else "simple";
-
-            # Shut down Postgres using SIGINT ("Fast Shutdown mode").  See
-            # http://www.postgresql.org/docs/current/static/server-shutdown.html
-            KillSignal = "SIGINT";
-            KillMode = "mixed";
-
-            # Give Postgres a decent amount of time to clean up after
-            # receiving systemd's SIGINT.
-            TimeoutSec = 120;
-          };
-
         # Wait for PostgreSQL to be ready to accept connections.
         postStart =
           ''
-            PSQL="${pkgs.utillinux}/bin/runuser -u ${cfg.superUser} -- psql --port=${toString cfg.port}"
+            PSQL="psql --port=${toString cfg.port}"
 
             while ! $PSQL -d postgres -c "" 2> /dev/null; do
                 if ! kill -0 "$MAINPID"; then exit 1; fi
@@ -369,6 +368,32 @@ in
             '') cfg.ensureUsers}
           '';
 
+        serviceConfig = mkMerge [
+          { ExecReload = "${pkgs.coreutils}/bin/kill -HUP $MAINPID";
+            User = "postgres";
+            Group = "postgres";
+            RuntimeDirectory = "postgresql";
+            Type = if versionAtLeast cfg.package.version "9.6"
+                   then "notify"
+                   else "simple";
+
+            # Shut down Postgres using SIGINT ("Fast Shutdown mode").  See
+            # http://www.postgresql.org/docs/current/static/server-shutdown.html
+            KillSignal = "SIGINT";
+            KillMode = "mixed";
+
+            # Give Postgres a decent amount of time to clean up after
+            # receiving systemd's SIGINT.
+            TimeoutSec = 120;
+
+            ExecStart = "${postgresql}/bin/postgres";
+          }
+          (mkIf (cfg.dataDir == "/var/lib/postgresql/${cfg.package.psqlSchema}") {
+            StateDirectory = "postgresql postgresql/${cfg.package.psqlSchema}";
+            StateDirectoryMode = if groupAccessAvailable then "0750" else "0700";
+          })
+        ];
+
         unitConfig.RequiresMountsFor = "${cfg.dataDir}";
       };
 
diff --git a/nixpkgs/nixos/modules/services/databases/riak-cs.nix b/nixpkgs/nixos/modules/services/databases/riak-cs.nix
index 2cb204f729a7..fa6ac8863318 100644
--- a/nixpkgs/nixos/modules/services/databases/riak-cs.nix
+++ b/nixpkgs/nixos/modules/services/databases/riak-cs.nix
@@ -35,7 +35,7 @@ in
           Name of the Erlang node.
         '';
       };
-      
+
       anonymousUserCreation = mkOption {
         type = types.bool;
         default = false;
diff --git a/nixpkgs/nixos/modules/services/databases/victoriametrics.nix b/nixpkgs/nixos/modules/services/databases/victoriametrics.nix
index cb6bf8508fb6..0af5d2adf372 100644
--- a/nixpkgs/nixos/modules/services/databases/victoriametrics.nix
+++ b/nixpkgs/nixos/modules/services/databases/victoriametrics.nix
@@ -49,8 +49,8 @@ let cfg = config.services.victoriametrics; in
         ExecStart = ''
           ${cfg.package}/bin/victoria-metrics \
               -storageDataPath=/var/lib/victoriametrics \
-              -httpListenAddr ${cfg.listenAddress}
-              -retentionPeriod ${toString cfg.retentionPeriod}
+              -httpListenAddr ${cfg.listenAddress} \
+              -retentionPeriod ${toString cfg.retentionPeriod} \
               ${lib.escapeShellArgs cfg.extraOptions}
         '';
       };
diff --git a/nixpkgs/nixos/modules/services/desktops/deepin/deepin.nix b/nixpkgs/nixos/modules/services/desktops/deepin/deepin.nix
deleted file mode 100644
index f8fb73701af6..000000000000
--- a/nixpkgs/nixos/modules/services/desktops/deepin/deepin.nix
+++ /dev/null
@@ -1,123 +0,0 @@
-# deepin
-
-{ config, pkgs, lib, ... }:
-
-{
-
-  ###### interface
-
-  options = {
-
-    services.deepin.core.enable = lib.mkEnableOption "
-      Basic dbus and systemd services, groups and users needed by the
-      Deepin Desktop Environment.
-    ";
-
-    services.deepin.deepin-menu.enable = lib.mkEnableOption "
-      DBus service for unified menus in Deepin Desktop Environment.
-    ";
-
-    services.deepin.deepin-turbo.enable = lib.mkEnableOption "
-      Turbo service for the Deepin Desktop Environment. It is a daemon
-      that helps to launch applications faster.
-    ";
-
-  };
-
-
-  ###### implementation
-
-  config = lib.mkMerge [
-
-    (lib.mkIf config.services.deepin.core.enable {
-      environment.systemPackages = [
-        pkgs.deepin.dde-api
-        pkgs.deepin.dde-calendar
-        pkgs.deepin.dde-control-center
-        pkgs.deepin.dde-daemon
-        pkgs.deepin.dde-dock
-        pkgs.deepin.dde-launcher
-        pkgs.deepin.dde-file-manager
-        pkgs.deepin.dde-session-ui
-        pkgs.deepin.deepin-anything
-        pkgs.deepin.deepin-image-viewer
-      ];
-
-      services.dbus.packages = [
-        pkgs.deepin.dde-api
-        pkgs.deepin.dde-calendar
-        pkgs.deepin.dde-control-center
-        pkgs.deepin.dde-daemon
-        pkgs.deepin.dde-dock
-        pkgs.deepin.dde-launcher
-        pkgs.deepin.dde-file-manager
-        pkgs.deepin.dde-session-ui
-        pkgs.deepin.deepin-anything
-        pkgs.deepin.deepin-image-viewer
-      ];
-
-      systemd.packages = [
-        pkgs.deepin.dde-api
-        pkgs.deepin.dde-daemon
-        pkgs.deepin.dde-file-manager
-        pkgs.deepin.deepin-anything
-      ];
-
-      boot.extraModulePackages = [ config.boot.kernelPackages.deepin-anything ];
-
-      boot.kernelModules = [ "vfs_monitor" ];
-
-      users.groups.deepin-sound-player = { };
-
-      users.users.deepin-sound-player = {
-        description = "Deepin sound player";
-        group = "deepin-sound-player";
-        isSystemUser = true;
-      };
-
-      users.groups.deepin-daemon = { };
-
-      users.users.deepin-daemon = {
-        description = "Deepin daemon user";
-        group = "deepin-daemon";
-        isSystemUser = true;
-      };
-
-      users.groups.deepin_anything_server = { };
-
-      users.users.deepin_anything_server = {
-        description = "Deepin Anything Server";
-        group = "deepin_anything_server";
-        isSystemUser = true;
-      };
-
-      security.pam.services.deepin-auth-keyboard.text = ''
-        # original at ${pkgs.deepin.dde-daemon}/etc/pam.d/deepin-auth-keyboard
-        auth	[success=2 default=ignore]	pam_lsass.so
-        auth	[success=1 default=ignore]	pam_unix.so nullok_secure try_first_pass
-        auth	requisite	pam_deny.so
-        auth	required	pam_permit.so
-      '';
-
-      environment.etc = {
-        "polkit-1/localauthority/10-vendor.d/com.deepin.api.device.pkla".source = "${pkgs.deepin.dde-api}/etc/polkit-1/localauthority/10-vendor.d/com.deepin.api.device.pkla";
-        "polkit-1/localauthority/10-vendor.d/com.deepin.daemon.Accounts.pkla".source = "${pkgs.deepin.dde-daemon}/etc/polkit-1/localauthority/10-vendor.d/com.deepin.daemon.Accounts.pkla";
-        "polkit-1/localauthority/10-vendor.d/com.deepin.daemon.Grub2.pkla".source = "${pkgs.deepin.dde-daemon}/etc/polkit-1/localauthority/10-vendor.d/com.deepin.daemon.Grub2.pkla";
-      };
-
-      services.deepin.deepin-menu.enable = true;
-      services.deepin.deepin-turbo.enable = true;
-    })
-
-    (lib.mkIf config.services.deepin.deepin-menu.enable {
-      services.dbus.packages = [ pkgs.deepin.deepin-menu ];
-    })
-
-    (lib.mkIf config.services.deepin.deepin-turbo.enable {
-      environment.systemPackages = [ pkgs.deepin.deepin-turbo ];
-      systemd.packages = [ pkgs.deepin.deepin-turbo ];
-    })
-
-  ];
-
-}
diff --git a/nixpkgs/nixos/modules/services/desktops/espanso.nix b/nixpkgs/nixos/modules/services/desktops/espanso.nix
new file mode 100644
index 000000000000..cd2eadf88168
--- /dev/null
+++ b/nixpkgs/nixos/modules/services/desktops/espanso.nix
@@ -0,0 +1,25 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+let cfg = config.services.espanso;
+in {
+  meta = { maintainers = with lib.maintainers; [ numkem ]; };
+
+  options = {
+    services.espanso = { enable = options.mkEnableOption "Espanso"; };
+  };
+
+  config = mkIf cfg.enable {
+    systemd.user.services.espanso = {
+      description = "Espanso daemon";
+      path = with pkgs; [ espanso libnotify xclip ];
+      serviceConfig = {
+        ExecStart = "${pkgs.espanso}/bin/espanso daemon";
+        Restart = "on-failure";
+      };
+      wantedBy = [ "default.target" ];
+    };
+
+    environment.systemPackages = [ pkgs.espanso ];
+  };
+}
diff --git a/nixpkgs/nixos/modules/services/desktops/flatpak.nix b/nixpkgs/nixos/modules/services/desktops/flatpak.nix
index 7fb0024f37dc..7da92cc9f264 100644
--- a/nixpkgs/nixos/modules/services/desktops/flatpak.nix
+++ b/nixpkgs/nixos/modules/services/desktops/flatpak.nix
@@ -42,6 +42,7 @@ in {
     # It has been possible since https://github.com/flatpak/flatpak/releases/tag/1.3.2
     # to build a SELinux policy module.
 
+    # TODO: use sysusers.d
     users.users.flatpak = {
       description = "Flatpak system helper";
       group = "flatpak";
diff --git a/nixpkgs/nixos/modules/services/desktops/geoclue2.nix b/nixpkgs/nixos/modules/services/desktops/geoclue2.nix
index 542b2ead4104..6702bd395a03 100644
--- a/nixpkgs/nixos/modules/services/desktops/geoclue2.nix
+++ b/nixpkgs/nixos/modules/services/desktops/geoclue2.nix
@@ -160,7 +160,7 @@ in
       };
 
       appConfig = mkOption {
-        type = types.loaOf appConfigModule;
+        type = types.attrsOf appConfigModule;
         default = {};
         example = literalExample ''
           "com.github.app" = {
diff --git a/nixpkgs/nixos/modules/services/desktops/malcontent.nix b/nixpkgs/nixos/modules/services/desktops/malcontent.nix
index 5d6912595b52..1fbeb17e6aeb 100644
--- a/nixpkgs/nixos/modules/services/desktops/malcontent.nix
+++ b/nixpkgs/nixos/modules/services/desktops/malcontent.nix
@@ -28,7 +28,10 @@ with lib;
       malcontent-ui
     ];
 
-    services.dbus.packages = [ pkgs.malcontent ];
+    services.dbus.packages = [
+      # D-Bus services are in `out`, not the default `bin` output that would be picked up by `makeDbusConf`.
+      pkgs.malcontent.out
+    ];
 
     services.accounts-daemon.enable = true;
 
diff --git a/nixpkgs/nixos/modules/services/development/jupyter/default.nix b/nixpkgs/nixos/modules/services/development/jupyter/default.nix
index e598b0186450..6a5fd6b2940e 100644
--- a/nixpkgs/nixos/modules/services/development/jupyter/default.nix
+++ b/nixpkgs/nixos/modules/services/development/jupyter/default.nix
@@ -6,10 +6,7 @@ let
 
   cfg = config.services.jupyter;
 
-  # NOTE: We don't use top-level jupyter because we don't
-  # want to pass in JUPYTER_PATH but use .environment instead,
-  # saving a rebuild.
-  package = pkgs.python3.pkgs.notebook;
+  package = cfg.package;
 
   kernels = (pkgs.jupyter-kernel.create  {
     definitions = if cfg.kernels != null
@@ -37,6 +34,27 @@ in {
       '';
     };
 
+    package = mkOption {
+      type = types.package;
+      # NOTE: We don't use top-level jupyter because we don't
+      # want to pass in JUPYTER_PATH but use .environment instead,
+      # saving a rebuild.
+      default = pkgs.python3.pkgs.notebook;
+      description = ''
+        Jupyter package to use.
+      '';
+    };
+
+    command = mkOption {
+      type = types.str;
+      default = "jupyter-notebook";
+      example = "jupyter-lab";
+      description = ''
+        Which command the service runs. Note that not all jupyter packages
+        have all commands, e.g. jupyter-lab isn't present in the default package.
+       '';
+    };
+
     port = mkOption {
       type = types.int;
       default = 8888;
@@ -157,7 +175,7 @@ in {
 
         serviceConfig = {
           Restart = "always";
-          ExecStart = ''${package}/bin/jupyter-notebook \
+          ExecStart = ''${package}/bin/${cfg.command} \
             --no-browser \
             --ip=${cfg.ip} \
             --port=${toString cfg.port} --port-retries 0 \
diff --git a/nixpkgs/nixos/modules/services/development/jupyterhub/default.nix b/nixpkgs/nixos/modules/services/development/jupyterhub/default.nix
new file mode 100644
index 000000000000..f1dcab68b000
--- /dev/null
+++ b/nixpkgs/nixos/modules/services/development/jupyterhub/default.nix
@@ -0,0 +1,190 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+
+  cfg = config.services.jupyterhub;
+
+  kernels = (pkgs.jupyter-kernel.create  {
+    definitions = if cfg.kernels != null
+      then cfg.kernels
+      else  pkgs.jupyter-kernel.default;
+  });
+
+  jupyterhubConfig = pkgs.writeText "jupyterhub_config.py" ''
+    c.JupyterHub.bind_url = "http://${cfg.host}:${toString cfg.port}"
+
+    c.JupyterHub.authenticator_class = "${cfg.authentication}"
+    c.JupyterHub.spawner_class = "${cfg.spawner}"
+
+    c.SystemdSpawner.default_url = '/lab'
+    c.SystemdSpawner.cmd = "${cfg.jupyterlabEnv}/bin/jupyterhub-singleuser"
+    c.SystemdSpawner.environment = {
+      'JUPYTER_PATH': '${kernels}'
+    }
+
+    ${cfg.extraConfig}
+  '';
+in {
+  meta.maintainers = with maintainers; [ costrouc ];
+
+  options.services.jupyterhub = {
+    enable = mkEnableOption "Jupyterhub development server";
+
+    authentication = mkOption {
+      type = types.str;
+      default = "jupyterhub.auth.PAMAuthenticator";
+      description = ''
+        Jupyterhub authentication to use
+
+        There are many authenticators available including: oauth, pam,
+        ldap, kerberos, etc.
+      '';
+    };
+
+    spawner = mkOption {
+      type = types.str;
+      default = "systemdspawner.SystemdSpawner";
+      description = ''
+        Jupyterhub spawner to use
+
+        There are many spawners available including: local process,
+        systemd, docker, kubernetes, yarn, batch, etc.
+      '';
+    };
+
+    extraConfig = mkOption {
+      type = types.lines;
+      default = "";
+      description = ''
+        Extra contents appended to the jupyterhub configuration
+
+        Jupyterhub configuration is a normal python file using
+        Traitlets. https://jupyterhub.readthedocs.io/en/stable/getting-started/config-basics.html. The
+        base configuration of this module was designed to have sane
+        defaults for configuration but you can override anything since
+        this is a python file.
+      '';
+      example = literalExample ''
+         c.SystemdSpawner.mem_limit = '8G'
+         c.SystemdSpawner.cpu_limit = 2.0
+      '';
+    };
+
+    jupyterhubEnv = mkOption {
+      type = types.package;
+      default = (pkgs.python3.withPackages (p: with p; [
+        jupyterhub
+        jupyterhub-systemdspawner
+      ]));
+      description = ''
+        Python environment to run jupyterhub
+
+        Customizing will affect the packages available in the hub and
+        proxy. This will allow packages to be available for the
+        extraConfig that you may need. This will not normally need to
+        be changed.
+      '';
+    };
+
+    jupyterlabEnv = mkOption {
+      type = types.package;
+      default = (pkgs.python3.withPackages (p: with p; [
+        jupyterhub
+        jupyterlab
+      ]));
+      description = ''
+        Python environment to run jupyterlab
+
+        Customizing will affect the packages available in the
+        jupyterlab server and the default kernel provided. This is the
+        way to customize the jupyterlab extensions and jupyter
+        notebook extensions. This will not normally need to
+        be changed.
+      '';
+    };
+
+    kernels = mkOption {
+      type = types.nullOr (types.attrsOf(types.submodule (import ../jupyter/kernel-options.nix {
+        inherit lib;
+      })));
+
+      default = null;
+      example = literalExample ''
+        {
+          python3 = let
+            env = (pkgs.python3.withPackages (pythonPackages: with pythonPackages; [
+                    ipykernel
+                    pandas
+                    scikitlearn
+                  ]));
+          in {
+            displayName = "Python 3 for machine learning";
+            argv = [
+              "''${env.interpreter}"
+              "-m"
+              "ipykernel_launcher"
+              "-f"
+              "{connection_file}"
+            ];
+            language = "python";
+            logo32 = "''${env}/''${env.sitePackages}/ipykernel/resources/logo-32x32.png";
+            logo64 = "''${env}/''${env.sitePackages}/ipykernel/resources/logo-64x64.png";
+          };
+        }
+      '';
+      description = ''
+        Declarative kernel config
+
+        Kernels can be declared in any language that supports and has
+        the required dependencies to communicate with a jupyter server.
+        In python's case, it means that ipykernel package must always be
+        included in the list of packages of the targeted environment.
+      '';
+    };
+
+    port = mkOption {
+      type = types.port;
+      default = 8000;
+      description = ''
+        Port number Jupyterhub will be listening on
+      '';
+    };
+
+    host = mkOption {
+      type = types.str;
+      default = "0.0.0.0";
+      description = ''
+        Bind IP JupyterHub will be listening on
+      '';
+    };
+
+    stateDirectory = mkOption {
+      type = types.str;
+      default = "jupyterhub";
+      description = ''
+        Directory for jupyterhub state (token + database)
+      '';
+    };
+  };
+
+  config = mkMerge [
+    (mkIf cfg.enable  {
+      systemd.services.jupyterhub = {
+        description = "Jupyterhub development server";
+
+        after = [ "network.target" ];
+        wantedBy = [ "multi-user.target" ];
+
+        serviceConfig = {
+          Restart = "always";
+          ExecStart = "${cfg.jupyterhubEnv}/bin/jupyterhub --config ${jupyterhubConfig}";
+          User = "root";
+          StateDirectory = cfg.stateDirectory;
+          WorkingDirectory = "/var/lib/${cfg.stateDirectory}";
+        };
+      };
+    })
+  ];
+}
diff --git a/nixpkgs/nixos/modules/services/development/lorri.nix b/nixpkgs/nixos/modules/services/development/lorri.nix
index c843aa56d133..fc576e4c18ba 100644
--- a/nixpkgs/nixos/modules/services/development/lorri.nix
+++ b/nixpkgs/nixos/modules/services/development/lorri.nix
@@ -15,6 +15,15 @@ in {
           issued by the `lorri` command.
         '';
       };
+      package = lib.mkOption {
+        default = pkgs.lorri;
+        type = lib.types.package;
+        description = ''
+          The lorri package to use.
+        '';
+        defaultText = lib.literalExample "pkgs.lorri";
+        example = lib.literalExample "pkgs.lorri";
+      };
     };
   };
 
@@ -34,7 +43,7 @@ in {
       after = [ "lorri.socket" ];
       path = with pkgs; [ config.nix.package git gnutar gzip ];
       serviceConfig = {
-        ExecStart = "${pkgs.lorri}/bin/lorri daemon";
+        ExecStart = "${cfg.package}/bin/lorri daemon";
         PrivateTmp = true;
         ProtectSystem = "strict";
         ProtectHome = "read-only";
@@ -42,6 +51,6 @@ in {
       };
     };
 
-    environment.systemPackages = [ pkgs.lorri ];
+    environment.systemPackages = [ cfg.package ];
   };
 }
diff --git a/nixpkgs/nixos/modules/services/editors/emacs.nix b/nixpkgs/nixos/modules/services/editors/emacs.nix
index d791b387665f..00d9eaad9eb9 100644
--- a/nixpkgs/nixos/modules/services/editors/emacs.nix
+++ b/nixpkgs/nixos/modules/services/editors/emacs.nix
@@ -15,26 +15,27 @@ let
     fi
   '';
 
-desktopApplicationFile = pkgs.writeTextFile {
-  name = "emacsclient.desktop";
-  destination = "/share/applications/emacsclient.desktop";
-  text = ''
-[Desktop Entry]
-Name=Emacsclient
-GenericName=Text Editor
-Comment=Edit text
-MimeType=text/english;text/plain;text/x-makefile;text/x-c++hdr;text/x-c++src;text/x-chdr;text/x-csrc;text/x-java;text/x-moc;text/x-pascal;text/x-tcl;text/x-tex;application/x-shellscript;text/x-c;text/x-c++;
-Exec=emacseditor %F
-Icon=emacs
-Type=Application
-Terminal=false
-Categories=Development;TextEditor;
-StartupWMClass=Emacs
-Keywords=Text;Editor;
-'';
-};
-
-in {
+  desktopApplicationFile = pkgs.writeTextFile {
+    name = "emacsclient.desktop";
+    destination = "/share/applications/emacsclient.desktop";
+    text = ''
+      [Desktop Entry]
+      Name=Emacsclient
+      GenericName=Text Editor
+      Comment=Edit text
+      MimeType=text/english;text/plain;text/x-makefile;text/x-c++hdr;text/x-c++src;text/x-chdr;text/x-csrc;text/x-java;text/x-moc;text/x-pascal;text/x-tcl;text/x-tex;application/x-shellscript;text/x-c;text/x-c++;
+      Exec=emacseditor %F
+      Icon=emacs
+      Type=Application
+      Terminal=false
+      Categories=Development;TextEditor;
+      StartupWMClass=Emacs
+      Keywords=Text;Editor;
+    '';
+  };
+
+in
+{
 
   options.services.emacs = {
     enable = mkOption {
@@ -86,10 +87,10 @@ in {
       description = "Emacs: the extensible, self-documenting text editor";
 
       serviceConfig = {
-        Type      = "forking";
+        Type = "forking";
         ExecStart = "${pkgs.bash}/bin/bash -c 'source ${config.system.build.setEnvironment}; exec ${cfg.package}/bin/emacs --daemon'";
-        ExecStop  = "${cfg.package}/bin/emacsclient --eval (kill-emacs)";
-        Restart   = "always";
+        ExecStop = "${cfg.package}/bin/emacsclient --eval (kill-emacs)";
+        Restart = "always";
       };
     } // optionalAttrs cfg.enable { wantedBy = [ "default.target" ]; };
 
diff --git a/nixpkgs/nixos/modules/services/editors/emacs.xml b/nixpkgs/nixos/modules/services/editors/emacs.xml
index 74c60014dcea..302aa1ed7c48 100644
--- a/nixpkgs/nixos/modules/services/editors/emacs.xml
+++ b/nixpkgs/nixos/modules/services/editors/emacs.xml
@@ -53,11 +53,11 @@
        <varname>emacs</varname>
       </term>
       <term>
-       <varname>emacs25</varname>
+       <varname>emacs</varname>
       </term>
       <listitem>
        <para>
-        The latest stable version of Emacs 25 using the
+        The latest stable version of Emacs using the
         <link
                 xlink:href="http://www.gtk.org">GTK 2</link>
         widget toolkit.
@@ -66,11 +66,11 @@
      </varlistentry>
      <varlistentry>
       <term>
-       <varname>emacs25-nox</varname>
+       <varname>emacs-nox</varname>
       </term>
       <listitem>
        <para>
-        Emacs 25 built without any dependency on X11 libraries.
+        Emacs built without any dependency on X11 libraries.
        </para>
       </listitem>
      </varlistentry>
@@ -79,11 +79,11 @@
        <varname>emacsMacport</varname>
       </term>
       <term>
-       <varname>emacs25Macport</varname>
+       <varname>emacsMacport</varname>
       </term>
       <listitem>
        <para>
-        Emacs 25 with the "Mac port" patches, providing a more native look and
+        Emacs with the "Mac port" patches, providing a more native look and
         feel under macOS.
        </para>
       </listitem>
@@ -322,7 +322,7 @@ https://nixos.org/nixpkgs/manual/#sec-modify-via-packageOverrides
     If you want, you can tweak the Emacs package itself from your
     <filename>emacs.nix</filename>. For example, if you want to have a
     GTK 3-based Emacs instead of the default GTK 2-based binary and remove the
-    automatically generated <filename>emacs.desktop</filename> (useful is you
+    automatically generated <filename>emacs.desktop</filename> (useful if you
     only use <command>emacsclient</command>), you can change your file
     <filename>emacs.nix</filename> in this way:
    </para>
diff --git a/nixpkgs/nixos/modules/services/games/minetest-server.nix b/nixpkgs/nixos/modules/services/games/minetest-server.nix
index 98e69c6dc0ea..f52079fc1ef6 100644
--- a/nixpkgs/nixos/modules/services/games/minetest-server.nix
+++ b/nixpkgs/nixos/modules/services/games/minetest-server.nix
@@ -5,12 +5,12 @@ with lib;
 let
   cfg   = config.services.minetest-server;
   flag  = val: name: if val != null then "--${name} ${val} " else "";
-  flags = [ 
-    (flag cfg.gameId "gameid") 
-    (flag cfg.world "world") 
-    (flag cfg.configPath "config") 
-    (flag cfg.logPath "logfile") 
-    (flag cfg.port "port") 
+  flags = [
+    (flag cfg.gameId "gameid")
+    (flag cfg.world "world")
+    (flag cfg.configPath "config")
+    (flag cfg.logPath "logfile")
+    (flag cfg.port "port")
   ];
 in
 {
@@ -26,7 +26,7 @@ in
         type        = types.nullOr types.str;
         default     = null;
         description = ''
-          Id of the game to use. To list available games run 
+          Id of the game to use. To list available games run
           `minetestserver --gameid list`.
 
           If only one game exists, this option can be null.
@@ -59,7 +59,7 @@ in
         type        = types.nullOr types.path;
         default     = null;
         description = ''
-          Path to logfile for logging. 
+          Path to logfile for logging.
 
           If set to null, logging will be output to stdout which means
           all output will be catched by systemd.
diff --git a/nixpkgs/nixos/modules/services/games/terraria.nix b/nixpkgs/nixos/modules/services/games/terraria.nix
index a59b74c0b4c4..34c8ff137d6a 100644
--- a/nixpkgs/nixos/modules/services/games/terraria.nix
+++ b/nixpkgs/nixos/modules/services/games/terraria.nix
@@ -7,7 +7,7 @@ let
   worldSizeMap = { small = 1; medium = 2; large = 3; };
   valFlag = name: val: optionalString (val != null) "-${name} \"${escape ["\\" "\""] (toString val)}\"";
   boolFlag = name: val: optionalString val "-${name}";
-  flags = [ 
+  flags = [
     (valFlag "port" cfg.port)
     (valFlag "maxPlayers" cfg.maxPlayers)
     (valFlag "password" cfg.password)
@@ -25,7 +25,7 @@ let
       exit 0
     fi
 
-    ${getBin pkgs.tmux}/bin/tmux -S /var/lib/terraria/terraria.sock send-keys Enter exit Enter
+    ${getBin pkgs.tmux}/bin/tmux -S ${cfg.dataDir}/terraria.sock send-keys Enter exit Enter
     ${getBin pkgs.coreutils}/bin/tail --pid="$1" -f /dev/null
   '';
 in
@@ -36,7 +36,7 @@ in
         type        = types.bool;
         default     = false;
         description = ''
-          If enabled, starts a Terraria server. The server can be connected to via <literal>tmux -S /var/lib/terraria/terraria.sock attach</literal>
+          If enabled, starts a Terraria server. The server can be connected to via <literal>tmux -S ${cfg.dataDir}/terraria.sock attach</literal>
           for administration by users who are a part of the <literal>terraria</literal> group (use <literal>C-b d</literal> shortcut to detach again).
         '';
       };
@@ -111,13 +111,19 @@ in
         default     = false;
         description = "Disables automatic Universal Plug and Play.";
       };
+      dataDir = mkOption {
+        type        = types.str;
+        default     = "/var/lib/terraria";
+        example     = "/srv/terraria";
+        description = "Path to variable state data directory for terraria.";
+      };
     };
   };
 
   config = mkIf cfg.enable {
     users.users.terraria = {
       description = "Terraria server service user";
-      home        = "/var/lib/terraria";
+      home        = cfg.dataDir;
       createHome  = true;
       uid         = config.ids.uids.terraria;
     };
@@ -136,13 +142,13 @@ in
         User    = "terraria";
         Type = "forking";
         GuessMainPID = true;
-        ExecStart = "${getBin pkgs.tmux}/bin/tmux -S /var/lib/terraria/terraria.sock new -d ${pkgs.terraria-server}/bin/TerrariaServer ${concatStringsSep " " flags}";
+        ExecStart = "${getBin pkgs.tmux}/bin/tmux -S ${cfg.dataDir}/terraria.sock new -d ${pkgs.terraria-server}/bin/TerrariaServer ${concatStringsSep " " flags}";
         ExecStop = "${stopScript} $MAINPID";
       };
 
       postStart = ''
-        ${pkgs.coreutils}/bin/chmod 660 /var/lib/terraria/terraria.sock
-        ${pkgs.coreutils}/bin/chgrp terraria /var/lib/terraria/terraria.sock
+        ${pkgs.coreutils}/bin/chmod 660 ${cfg.dataDir}/terraria.sock
+        ${pkgs.coreutils}/bin/chgrp terraria ${cfg.dataDir}/terraria.sock
       '';
     };
   };
diff --git a/nixpkgs/nixos/modules/services/hardware/fancontrol.nix b/nixpkgs/nixos/modules/services/hardware/fancontrol.nix
index bb4541a784da..e1ce11a5aef6 100644
--- a/nixpkgs/nixos/modules/services/hardware/fancontrol.nix
+++ b/nixpkgs/nixos/modules/services/hardware/fancontrol.nix
@@ -12,7 +12,7 @@ in{
 
     config = mkOption {
       default = null;
-      type = types.lines;
+      type = types.nullOr types.lines;
       description = "Fancontrol configuration file content. See <citerefentry><refentrytitle>pwmconfig</refentrytitle><manvolnum>8</manvolnum></citerefentry> from the lm_sensors package.";
       example = ''
         # Configuration file generated by pwmconfig
diff --git a/nixpkgs/nixos/modules/services/hardware/sane_extra_backends/brscan4.nix b/nixpkgs/nixos/modules/services/hardware/sane_extra_backends/brscan4.nix
index 6f49a1ab6d40..a6afa01dd812 100644
--- a/nixpkgs/nixos/modules/services/hardware/sane_extra_backends/brscan4.nix
+++ b/nixpkgs/nixos/modules/services/hardware/sane_extra_backends/brscan4.nix
@@ -81,7 +81,7 @@ in
         { office1 = { model = "MFC-7860DW"; ip = "192.168.1.2"; };
           office2 = { model = "MFC-7860DW"; nodename = "BRW0080927AFBCE"; };
         };
-      type = with types; loaOf (submodule netDeviceOpts);
+      type = with types; attrsOf (submodule netDeviceOpts);
       description = ''
         The list of network devices that will be registered against the brscan4
         sane backend.
diff --git a/nixpkgs/nixos/modules/services/hardware/thermald.nix b/nixpkgs/nixos/modules/services/hardware/thermald.nix
index ecb529e9bf01..b7be0e89d0c6 100644
--- a/nixpkgs/nixos/modules/services/hardware/thermald.nix
+++ b/nixpkgs/nixos/modules/services/hardware/thermald.nix
@@ -23,6 +23,15 @@ in {
         default = null;
         description = "the thermald manual configuration file.";
       };
+
+      adaptive = mkOption {
+        type = types.bool;
+        default = false;
+        description = ''
+          Whether to enable adaptive mode, only working on kernel versions greater than 5.8.
+          Thermald will detect this itself, safe to enable on kernel versions below 5.8.
+        '';
+      };
     };
   };
 
@@ -39,6 +48,7 @@ in {
             --no-daemon \
             ${optionalString cfg.debug "--loglevel=debug"} \
             ${optionalString (cfg.configFile != null) "--config-file ${cfg.configFile}"} \
+            ${optionalString cfg.adaptive "--adaptive"} \
             --dbus-enable
         '';
       };
diff --git a/nixpkgs/nixos/modules/services/hardware/thinkfan.nix b/nixpkgs/nixos/modules/services/hardware/thinkfan.nix
index 7c105e99ca54..3bda61ed1a93 100644
--- a/nixpkgs/nixos/modules/services/hardware/thinkfan.nix
+++ b/nixpkgs/nixos/modules/services/hardware/thinkfan.nix
@@ -67,7 +67,7 @@ in {
         type = types.bool;
         default = false;
         description = ''
-          Whether to build thinkfan with SMART support to read temperatures 
+          Whether to build thinkfan with SMART support to read temperatures
           directly from hard disks.
         '';
       };
diff --git a/nixpkgs/nixos/modules/services/hardware/tlp.nix b/nixpkgs/nixos/modules/services/hardware/tlp.nix
index 3962d7b15989..4230f2edd279 100644
--- a/nixpkgs/nixos/modules/services/hardware/tlp.nix
+++ b/nixpkgs/nixos/modules/services/hardware/tlp.nix
@@ -8,12 +8,8 @@ let
   mkTlpConfig = tlpConfig: generators.toKeyValue {
     mkKeyValue = generators.mkKeyValueDefault {
       mkValueString = val:
-        if isInt val then toString val
-        else if isString val then val
-        else if true == val then "1"
-        else if false == val then "0"
-        else if isList val then "\"" + (concatStringsSep " " val) + "\""
-        else err "invalid value provided to mkTlpConfig:" (toString val);
+        if isList val then "\"" + (toString val) + "\""
+        else toString val;
     } "=";
   } tlpConfig;
 in
@@ -27,10 +23,24 @@ in
         description = "Whether to enable the TLP power management daemon.";
       };
 
+      settings = mkOption {type = with types; attrsOf (oneOf [bool int float str (listOf str)]);
+        default = {};
+        example = {
+          SATA_LINKPWR_ON_BAT = "med_power_with_dipm";
+          USB_BLACKLIST_PHONE = 1;
+        };
+        description = ''
+          Options passed to TLP. See https://linrunner.de/tlp for all supported options..
+        '';
+      };
+
       extraConfig = mkOption {
         type = types.lines;
         default = "";
-        description = "Additional configuration variables for TLP";
+        description = ''
+          Verbatim additional configuration variables for TLP.
+          DEPRECATED: use services.tlp.config instead.
+        '';
       };
     };
   };
@@ -39,8 +49,20 @@ in
   config = mkIf cfg.enable {
     boot.kernelModules = [ "msr" ];
 
+    warnings = optional (cfg.extraConfig != "") ''
+      Using config.services.tlp.extraConfig is deprecated and will become unsupported in a future release. Use config.services.tlp.settings instead.
+    '';
+
+    assertions = [{
+      assertion = cfg.enable -> config.powerManagement.scsiLinkPolicy == null;
+      message = ''
+        `services.tlp.enable` and `config.powerManagement.scsiLinkPolicy` cannot be set both.
+        Set `services.tlp.settings.SATA_LINKPWR_ON_AC` and `services.tlp.settings.SATA_LINKPWR_ON_BAT` instead.
+      '';
+    }];
+
     environment.etc = {
-      "tlp.conf".text = cfg.extraConfig;
+      "tlp.conf".text = (mkTlpConfig cfg.settings) + cfg.extraConfig;
     } // optionalAttrs enableRDW {
       "NetworkManager/dispatcher.d/99tlp-rdw-nm".source =
         "${tlp}/etc/NetworkManager/dispatcher.d/99tlp-rdw-nm";
@@ -48,18 +70,25 @@ in
 
     environment.systemPackages = [ tlp ];
 
-    # FIXME: When the config is parametrized we need to move these into a
-    # conditional on the relevant options being enabled.
-    powerManagement = {
-      scsiLinkPolicy = null;
-      cpuFreqGovernor = null;
-      cpufreq.max = null;
-      cpufreq.min = null;
+
+    services.tlp.settings = let
+      cfg = config.powerManagement;
+      maybeDefault = val: lib.mkIf (val != null) (lib.mkDefault val);
+    in {
+      CPU_SCALING_GOVERNOR_ON_AC = maybeDefault cfg.cpuFreqGovernor;
+      CPU_SCALING_GOVERNOR_ON_BAT = maybeDefault cfg.cpuFreqGovernor;
+      CPU_SCALING_MIN_FREQ_ON_AC = maybeDefault cfg.cpufreq.min;
+      CPU_SCALING_MAX_FREQ_ON_AC = maybeDefault cfg.cpufreq.max;
+      CPU_SCALING_MIN_FREQ_ON_BAT = maybeDefault cfg.cpufreq.min;
+      CPU_SCALING_MAX_FREQ_ON_BAT = maybeDefault cfg.cpufreq.max;
     };
 
     services.udev.packages = [ tlp ];
 
     systemd = {
+      # use native tlp instead because it can also differentiate between AC/BAT
+      services.cpufreq.enable = false;
+
       packages = [ tlp ];
       # XXX: These must always be disabled/masked according to [1].
       #
diff --git a/nixpkgs/nixos/modules/services/hardware/trezord.nix b/nixpkgs/nixos/modules/services/hardware/trezord.nix
index c517e9fbb2bd..2594ac743710 100644
--- a/nixpkgs/nixos/modules/services/hardware/trezord.nix
+++ b/nixpkgs/nixos/modules/services/hardware/trezord.nix
@@ -10,7 +10,7 @@ in {
   meta = {
     doc = ./trezord.xml;
   };
-  
+
   ### interface
 
   options = {
@@ -40,7 +40,7 @@ in {
       };
     };
   };
-  
+
   ### implementation
 
   config = mkIf cfg.enable {
diff --git a/nixpkgs/nixos/modules/services/hardware/undervolt.nix b/nixpkgs/nixos/modules/services/hardware/undervolt.nix
index da627af73bc6..054ffa35050a 100644
--- a/nixpkgs/nixos/modules/services/hardware/undervolt.nix
+++ b/nixpkgs/nixos/modules/services/hardware/undervolt.nix
@@ -25,8 +25,11 @@ let
 in
 {
   options.services.undervolt = {
-    enable = mkEnableOption
-      "Intel CPU undervolting service (WARNING: may permanently damage your hardware!)";
+    enable = mkEnableOption ''
+       Undervolting service for Intel CPUs.
+
+       Warning: This service is not endorsed by Intel and may permanently damage your hardware. Use at your own risk!
+    '';
 
     verbose = mkOption {
       type = types.bool;
@@ -100,6 +103,17 @@ in
         The temperature target on battery power in Celsius degrees.
       '';
     };
+
+    useTimer = mkOption {
+      type = types.bool;
+      default = false;
+      description = ''
+        Whether to set a timer that applies the undervolt settings every 30s.
+        This will cause spam in the journal but might be required for some
+        hardware under specific conditions.
+        Enable this if your undervolt settings don't hold.
+      '';
+    };
   };
 
   config = mkIf cfg.enable {
@@ -111,6 +125,11 @@ in
       path = [ pkgs.undervolt ];
 
       description = "Intel Undervolting Service";
+
+      # Apply undervolt on boot, nixos generation switch and resume
+      wantedBy = [ "multi-user.target" "post-resume.target" ];
+      after = [ "post-resume.target" ]; # Not sure why but it won't work without this
+
       serviceConfig = {
         Type = "oneshot";
         Restart = "no";
@@ -118,7 +137,7 @@ in
       };
     };
 
-    systemd.timers.undervolt = {
+    systemd.timers.undervolt = mkIf cfg.useTimer {
       description = "Undervolt timer to ensure voltage settings are always applied";
       partOf = [ "undervolt.service" ];
       wantedBy = [ "multi-user.target" ];
diff --git a/nixpkgs/nixos/modules/services/logging/logrotate.nix b/nixpkgs/nixos/modules/services/logging/logrotate.nix
index 565618b27a87..7d6102b82557 100644
--- a/nixpkgs/nixos/modules/services/logging/logrotate.nix
+++ b/nixpkgs/nixos/modules/services/logging/logrotate.nix
@@ -5,54 +5,93 @@ with lib;
 let
   cfg = config.services.logrotate;
 
-  pathOptions = {
+  pathOpts = {
     options = {
+      enable = mkOption {
+        type = types.bool;
+        default = true;
+        description = ''
+          Whether to enable log rotation for this path. This can be used to explicitly disable
+          logging that has been configured by NixOS.
+        '';
+      };
+
       path = mkOption {
         type = types.str;
-        description = "The path to log files to be rotated";
+        description = ''
+          The path to log files to be rotated.
+        '';
       };
+
       user = mkOption {
-        type = types.str;
-        description = "The user account to use for rotation";
+        type = with types; nullOr str;
+        default = null;
+        description = ''
+          The user account to use for rotation.
+        '';
       };
+
       group = mkOption {
-        type = types.str;
-        description = "The group to use for rotation";
+        type = with types; nullOr str;
+        default = null;
+        description = ''
+          The group to use for rotation.
+        '';
       };
+
       frequency = mkOption {
-        type = types.enum [
-          "daily" "weekly" "monthly" "yearly"
-        ];
+        type = types.enum [ "daily" "weekly" "monthly" "yearly" ];
         default = "daily";
-        description = "How often to rotate the logs";
+        description = ''
+          How often to rotate the logs.
+        '';
       };
+
       keep = mkOption {
         type = types.int;
         default = 20;
-        description = "How many rotations to keep";
+        description = ''
+          How many rotations to keep.
+        '';
       };
+
       extraConfig = mkOption {
         type = types.lines;
         default = "";
-        description = "Extra logrotate config options for this path";
+        description = ''
+          Extra logrotate config options for this path. Refer to
+          <link xlink:href="https://linux.die.net/man/8/logrotate"/> for details.
+        '';
+      };
+
+      priority = mkOption {
+        type = types.int;
+        default = 1000;
+        description = ''
+          Order of this logrotate block in relation to the others. The semantics are
+          the same as with `lib.mkOrder`. Smaller values have a greater priority.
+        '';
       };
     };
-  };
 
-  pathConfig = options: ''
-    "${options.path}" {
-      su ${options.user} ${options.group}
-      ${options.frequency}
+    config.extraConfig = ''
       missingok
       notifempty
-      rotate ${toString options.keep}
-      ${options.extraConfig}
+    '';
+  };
+
+  mkConf = pathOpts: ''
+    # generated by NixOS using the `services.logrotate.paths.${pathOpts.name}` attribute set
+    "${pathOpts.path}" {
+      ${optionalString (pathOpts.user != null || pathOpts.group != null) "su ${pathOpts.user} ${pathOpts.group}"}
+      ${pathOpts.frequency}
+      rotate ${toString pathOpts.keep}
+      ${pathOpts.extraConfig}
     }
   '';
 
-  configFile = pkgs.writeText "logrotate.conf" (
-    (concatStringsSep "\n" ((map pathConfig cfg.paths) ++ [cfg.extraConfig]))
-  );
+  paths = sortProperties (mapAttrsToList (name: pathOpts: pathOpts // { name = name; }) (filterAttrs (_: pathOpts: pathOpts.enable) cfg.paths));
+  configFile = pkgs.writeText "logrotate.conf" (concatStringsSep "\n" ((map mkConf paths) ++ [ cfg.extraConfig ]));
 
 in
 {
@@ -65,41 +104,66 @@ in
       enable = mkEnableOption "the logrotate systemd service";
 
       paths = mkOption {
-        type = types.listOf (types.submodule pathOptions);
-        default = [];
-        description = "List of attribute sets with paths to rotate";
-        example = {
-          "/var/log/myapp/*.log" = {
-            user = "myuser";
-            group = "mygroup";
-            rotate = "weekly";
-            keep = 5;
-          };
-        };
+        type = with types; attrsOf (submodule pathOpts);
+        default = {};
+        description = ''
+          Attribute set of paths to rotate. The order each block appears in the generated configuration file
+          can be controlled by the <link linkend="opt-services.logrotate.paths._name_.priority">priority</link> option
+          using the same semantics as `lib.mkOrder`. Smaller values have a greater priority.
+        '';
+        example = literalExample ''
+          {
+            httpd = {
+              path = "/var/log/httpd/*.log";
+              user = config.services.httpd.user;
+              group = config.services.httpd.group;
+              keep = 7;
+            };
+
+            myapp = {
+              path = "/var/log/myapp/*.log";
+              user = "myuser";
+              group = "mygroup";
+              frequency = "weekly";
+              keep = 5;
+              priority = 1;
+            };
+          }
+        '';
       };
 
       extraConfig = mkOption {
         default = "";
         type = types.lines;
         description = ''
-          Extra contents to add to the logrotate config file.
-          See https://linux.die.net/man/8/logrotate
+          Extra contents to append to the logrotate configuration file. Refer to
+          <link xlink:href="https://linux.die.net/man/8/logrotate"/> for details.
         '';
       };
     };
   };
 
   config = mkIf cfg.enable {
-    systemd.services.logrotate = {
-      description   = "Logrotate Service";
-      wantedBy      = [ "multi-user.target" ];
-      startAt       = "*-*-* *:05:00";
+    assertions = mapAttrsToList (name: pathOpts:
+      { assertion = (pathOpts.user != null) == (pathOpts.group != null);
+        message = ''
+          If either of `services.logrotate.paths.${name}.user` or `services.logrotate.paths.${name}.group` are specified then *both* must be specified.
+        '';
+      }
+    ) cfg.paths;
 
-      serviceConfig.Restart = "no";
-      serviceConfig.User    = "root";
+    systemd.services.logrotate = {
+      description = "Logrotate Service";
+      wantedBy = [ "multi-user.target" ];
+      startAt = "*-*-* *:05:00";
       script = ''
         exec ${pkgs.logrotate}/sbin/logrotate ${configFile}
       '';
+
+      serviceConfig = {
+        Restart = "no";
+        User = "root";
+      };
     };
   };
 }
diff --git a/nixpkgs/nixos/modules/services/logging/logstash.nix b/nixpkgs/nixos/modules/services/logging/logstash.nix
index 21a83803fd8c..bf92425f998b 100644
--- a/nixpkgs/nixos/modules/services/logging/logstash.nix
+++ b/nixpkgs/nixos/modules/services/logging/logstash.nix
@@ -4,13 +4,9 @@ with lib;
 
 let
   cfg = config.services.logstash;
-  pluginPath = lib.concatStringsSep ":" cfg.plugins;
-  havePluginPath = lib.length cfg.plugins > 0;
   ops = lib.optionalString;
   verbosityFlag = "--log.level " + cfg.logLevel;
 
-  pluginsPath = "--path.plugins ${pluginPath}";
-
   logstashConf = pkgs.writeText "logstash.conf" ''
     input {
       ${cfg.inputConfig}
@@ -173,7 +169,7 @@ in
         ExecStart = concatStringsSep " " (filter (s: stringLength s != 0) [
           "${cfg.package}/bin/logstash"
           "-w ${toString cfg.filterWorkers}"
-          (ops havePluginPath pluginsPath)
+          (concatMapStringsSep " " (x: "--path.plugins ${x}") cfg.plugins)
           "${verbosityFlag}"
           "-f ${logstashConf}"
           "--path.settings ${logstashSettingsDir}"
diff --git a/nixpkgs/nixos/modules/services/mail/dovecot.nix b/nixpkgs/nixos/modules/services/mail/dovecot.nix
index 51cbcbf1cbc8..c166ef68f292 100644
--- a/nixpkgs/nixos/modules/services/mail/dovecot.nix
+++ b/nixpkgs/nixos/modules/services/mail/dovecot.nix
@@ -1,4 +1,4 @@
-{ config, lib, pkgs, ... }:
+{ options, config, lib, pkgs, ... }:
 
 with lib;
 
@@ -83,11 +83,11 @@ let
     )
 
     (
-      optionalString (cfg.mailboxes != []) ''
+      optionalString (cfg.mailboxes != {}) ''
         protocol imap {
           namespace inbox {
             inbox=yes
-            ${concatStringsSep "\n" (map mailboxConfig cfg.mailboxes)}
+            ${concatStringsSep "\n" (map mailboxConfig (attrValues cfg.mailboxes))}
           }
         }
       ''
@@ -131,12 +131,13 @@ let
     special_use = \${toString mailbox.specialUse}
   '' + "}";
 
-  mailboxes = { ... }: {
+  mailboxes = { name, ... }: {
     options = {
       name = mkOption {
-        type = types.nullOr (types.strMatching ''[^"]+'');
+        type = types.strMatching ''[^"]+'';
         example = "Spam";
-        default = null;
+        default = name;
+        readOnly = true;
         description = "The name of the mailbox.";
       };
       auto = mkOption {
@@ -335,19 +336,11 @@ in
     };
 
     mailboxes = mkOption {
-      type = with types; let m = submodule mailboxes; in either (listOf m) (attrsOf m);
+      type = with types; coercedTo
+        (listOf unspecified)
+        (list: listToAttrs (map (entry: { name = entry.name; value = removeAttrs entry ["name"]; }) list))
+        (attrsOf (submodule mailboxes));
       default = {};
-      apply = x:
-        if isList x then warn "Declaring `services.dovecot2.mailboxes' as a list is deprecated and will break eval in 21.03!" x
-        else mapAttrsToList (name: value:
-          if value.name != null
-            then throw ''
-              When specifying dovecot2 mailboxes as attributes, declaring
-              a `name'-attribute is prohibited! The name ${value.name} should
-              be the attribute key!
-            ''
-          else value // { inherit name; }
-        ) x;
       example = literalExample ''
         {
           Spam = { specialUse = "Junk"; auto = "create"; };
@@ -471,6 +464,10 @@ in
 
     environment.systemPackages = [ dovecotPkg ];
 
+    warnings = mkIf (any isList options.services.dovecot2.mailboxes.definitions) [
+      "Declaring `services.dovecot2.mailboxes' as a list is deprecated and will break eval in 21.03! See the release notes for more info for migration."
+    ];
+
     assertions = [
       {
         assertion = intersectLists cfg.protocols [ "pop3" "imap" ] != [];
diff --git a/nixpkgs/nixos/modules/services/mail/mailhog.nix b/nixpkgs/nixos/modules/services/mail/mailhog.nix
index 0f998c6d0ea6..b113f4ff3dec 100644
--- a/nixpkgs/nixos/modules/services/mail/mailhog.nix
+++ b/nixpkgs/nixos/modules/services/mail/mailhog.nix
@@ -4,17 +4,59 @@ with lib;
 
 let
   cfg = config.services.mailhog;
-in {
+
+  args = lib.concatStringsSep " " (
+    [
+      "-api-bind-addr :${toString cfg.apiPort}"
+      "-smtp-bind-addr :${toString cfg.smtpPort}"
+      "-ui-bind-addr :${toString cfg.uiPort}"
+      "-storage ${cfg.storage}"
+    ] ++ lib.optional (cfg.storage == "maildir")
+      "-maildir-path $STATE_DIRECTORY"
+    ++ cfg.extraArgs
+  );
+
+in
+{
   ###### interface
 
+  imports = [
+    (mkRemovedOptionModule [ "services" "mailhog" "user" ] "")
+  ];
+
   options = {
 
     services.mailhog = {
       enable = mkEnableOption "MailHog";
-      user = mkOption {
-        type = types.str;
-        default = "mailhog";
-        description = "User account under which mailhog runs.";
+
+      storage = mkOption {
+        type = types.enum [ "maildir" "memory" ];
+        default = "memory";
+        description = "Store mails on disk or in memory.";
+      };
+
+      apiPort = mkOption {
+        type = types.port;
+        default = 8025;
+        description = "Port on which the API endpoint will listen.";
+      };
+
+      smtpPort = mkOption {
+        type = types.port;
+        default = 1025;
+        description = "Port on which the SMTP endpoint will listen.";
+      };
+
+      uiPort = mkOption {
+        type = types.port;
+        default = 8025;
+        description = "Port on which the HTTP UI will listen.";
+      };
+
+      extraArgs = mkOption {
+        type = types.listOf types.str;
+        default = [];
+        description = "List of additional arguments to pass to the MailHog process.";
       };
     };
   };
@@ -24,20 +66,16 @@ in {
 
   config = mkIf cfg.enable {
 
-    users.users.mailhog = {
-      name = cfg.user;
-      description = "MailHog service user";
-      isSystemUser = true;
-    };
-
     systemd.services.mailhog = {
-      description = "MailHog service";
+      description = "MailHog - Web and API based SMTP testing";
       after = [ "network.target" ];
       wantedBy = [ "multi-user.target" ];
       serviceConfig = {
-        Type = "simple";
-        ExecStart = "${pkgs.mailhog}/bin/MailHog";
-        User = cfg.user;
+        Type = "exec";
+        ExecStart = "${pkgs.mailhog}/bin/MailHog ${args}";
+        DynamicUser = true;
+        Restart = "on-failure";
+        StateDirectory = "mailhog";
       };
     };
   };
diff --git a/nixpkgs/nixos/modules/services/mail/mailman.nix b/nixpkgs/nixos/modules/services/mail/mailman.nix
index 81108327d3c7..115730e29d5e 100644
--- a/nixpkgs/nixos/modules/services/mail/mailman.nix
+++ b/nixpkgs/nixos/modules/services/mail/mailman.nix
@@ -6,14 +6,9 @@ let
 
   cfg = config.services.mailman;
 
-  pythonEnv = pkgs.python3.withPackages (ps:
-    [ps.mailman ps.mailman-web]
-    ++ lib.optional cfg.hyperkitty.enable ps.mailman-hyperkitty
-    ++ cfg.extraPythonPackages);
-
   # This deliberately doesn't use recursiveUpdate so users can
   # override the defaults.
-  settings = {
+  webSettings = {
     DEFAULT_FROM_EMAIL = cfg.siteOwner;
     SERVER_EMAIL = cfg.siteOwner;
     ALLOWED_HOSTS = [ "localhost" "127.0.0.1" ] ++ cfg.webHosts;
@@ -29,9 +24,13 @@ let
         level = "INFO";
       };
     };
+    HAYSTACK_CONNECTIONS.default = {
+      ENGINE = "haystack.backends.whoosh_backend.WhooshEngine";
+      PATH = "/var/lib/mailman-web/fulltext-index";
+    };
   } // cfg.webSettings;
 
-  settingsJSON = pkgs.writeText "settings.json" (builtins.toJSON settings);
+  webSettingsJSON = pkgs.writeText "settings.json" (builtins.toJSON webSettings);
 
   # TODO: Should this be RFC42-ised so that users can set additional options without modifying the module?
   mtaConfig = pkgs.writeText "mailman-postfix.cfg" ''
@@ -40,31 +39,7 @@ let
     transport_file_type: hash
   '';
 
-  mailmanCfg = ''
-    [mailman]
-    site_owner: ${cfg.siteOwner}
-    layout: fhs
-
-    [paths.fhs]
-    bin_dir: ${pkgs.python3Packages.mailman}/bin
-    var_dir: /var/lib/mailman
-    queue_dir: $var_dir/queue
-    template_dir: $var_dir/templates
-    log_dir: /var/log/mailman
-    lock_dir: $var_dir/lock
-    etc_dir: /etc
-    ext_dir: $etc_dir/mailman.d
-    pid_file: /run/mailman/master.pid
-
-    [mta]
-    configuration: ${mtaConfig}
-  '' + optionalString cfg.hyperkitty.enable ''
-
-    [archiver.hyperkitty]
-    class: mailman_hyperkitty.Archiver
-    enable: yes
-    configuration: /var/lib/mailman/mailman-hyperkitty.cfg
-  '' + cfg.extraConfig;
+  mailmanCfg = (lib.generators.toINI {} cfg.settings) + cfg.extraConfig;
 
   mailmanHyperkittyCfg = pkgs.writeText "mailman-hyperkitty.cfg" ''
     [general]
@@ -154,6 +129,12 @@ in {
         enable = mkEnableOption "Automatic nginx and uwsgi setup for mailman-web";
       };
 
+      settings = mkOption {
+        description = "Settings for mailman.cfg";
+        type = types.attrsOf (types.attrsOf types.str);
+        default = {};
+      };
+
       hyperkitty = {
         enable = mkEnableOption "the Hyperkitty archiver for Mailman";
 
@@ -180,6 +161,35 @@ in {
 
   config = mkIf cfg.enable {
 
+    services.mailman.settings = {
+      mailman.site_owner = lib.mkDefault cfg.siteOwner;
+      mailman.layout = "fhs";
+
+      "paths.fhs" = {
+        bin_dir = "${pkgs.python3Packages.mailman}/bin";
+        var_dir = "/var/lib/mailman";
+        queue_dir = "$var_dir/queue";
+        template_dir = "$var_dir/templates";
+        log_dir = "/var/log/mailman";
+        lock_dir = "$var_dir/lock";
+        etc_dir = "/etc";
+        ext_dir = "$etc_dir/mailman.d";
+        pid_file = "/run/mailman/master.pid";
+      };
+
+      mta.configuration = lib.mkDefault "${mtaConfig}";
+
+      "archiver.hyperkitty" = lib.mkIf cfg.hyperkitty.enable {
+        class = "mailman_hyperkitty.Archiver";
+        enable = "yes";
+        configuration = "/var/lib/mailman/mailman-hyperkitty.cfg";
+      };
+    } // (let
+      loggerNames = ["root" "archiver" "bounce" "config" "database" "debug" "error" "fromusenet" "http" "locks" "mischief" "plugins" "runner" "smtp"];
+      loggerSectionNames = map (n: "logging.${n}") loggerNames;
+      in lib.genAttrs loggerSectionNames(name: { handler = "stderr"; })
+    );
+
     assertions = let
       inherit (config.services) postfix;
 
@@ -230,7 +240,7 @@ in {
 
       import json
 
-      with open('${settingsJSON}') as f:
+      with open('${webSettingsJSON}') as f:
           globals().update(json.load(f))
 
       with open('/var/lib/mailman-web/settings_local.json') as f:
@@ -243,7 +253,7 @@ in {
         serverAliases = cfg.webHosts;
         locations = {
           "/".extraConfig = "uwsgi_pass unix:/run/mailman-web.socket;";
-          "/static/".alias = settings.STATIC_ROOT + "/";
+          "/static/".alias = webSettings.STATIC_ROOT + "/";
         };
       };
     };
@@ -332,7 +342,7 @@ in {
         requiredBy = [ "mailman-uwsgi.service" ];
         restartTriggers = [ config.environment.etc."mailman3/settings.py".source ];
         script = ''
-          [[ -e "${settings.STATIC_ROOT}" ]] && find "${settings.STATIC_ROOT}/" -mindepth 1 -delete
+          [[ -e "${webSettings.STATIC_ROOT}" ]] && find "${webSettings.STATIC_ROOT}/" -mindepth 1 -delete
           ${pkgs.mailman-web}/bin/mailman-web migrate
           ${pkgs.mailman-web}/bin/mailman-web collectstatic
           ${pkgs.mailman-web}/bin/mailman-web compress
diff --git a/nixpkgs/nixos/modules/services/mail/opendkim.nix b/nixpkgs/nixos/modules/services/mail/opendkim.nix
index eb6a426684d4..9bf6f338d93e 100644
--- a/nixpkgs/nixos/modules/services/mail/opendkim.nix
+++ b/nixpkgs/nixos/modules/services/mail/opendkim.nix
@@ -129,6 +129,36 @@ in {
         User = cfg.user;
         Group = cfg.group;
         RuntimeDirectory = optional (cfg.socket == defaultSock) "opendkim";
+        StateDirectory = "opendkim";
+        StateDirectoryMode = "0700";
+        ReadWritePaths = [ cfg.keyPath ];
+
+        AmbientCapabilities = [];
+        CapabilityBoundingSet = [];
+        DevicePolicy = "closed";
+        LockPersonality = true;
+        MemoryDenyWriteExecute = true;
+        NoNewPrivileges = true;
+        PrivateDevices = true;
+        PrivateMounts = true;
+        PrivateTmp = true;
+        PrivateUsers = true;
+        ProtectClock = true;
+        ProtectControlGroups = true;
+        ProtectHome = true;
+        ProtectHostname = true;
+        ProtectKernelLogs = true;
+        ProtectKernelModules = true;
+        ProtectKernelTunables = true;
+        ProtectSystem = "strict";
+        RemoveIPC = true;
+        RestrictAddressFamilies = [ "AF_INET" "AF_INET6 AF_UNIX" ];
+        RestrictNamespaces = true;
+        RestrictRealtime = true;
+        RestrictSUIDSGID = true;
+        SystemCallArchitectures = "native";
+        SystemCallFilter = [ "@system-service" "~@privileged @resources" ];
+        UMask = "0077";
       };
     };
 
diff --git a/nixpkgs/nixos/modules/services/mail/pfix-srsd.nix b/nixpkgs/nixos/modules/services/mail/pfix-srsd.nix
index 38984f896d6a..e3dbf2a014f0 100644
--- a/nixpkgs/nixos/modules/services/mail/pfix-srsd.nix
+++ b/nixpkgs/nixos/modules/services/mail/pfix-srsd.nix
@@ -53,4 +53,4 @@ with lib;
       };
     };
   };
-}
\ No newline at end of file
+}
diff --git a/nixpkgs/nixos/modules/services/mail/postfix.nix b/nixpkgs/nixos/modules/services/mail/postfix.nix
index 608f64a68fb0..fd4d16cdc37b 100644
--- a/nixpkgs/nixos/modules/services/mail/postfix.nix
+++ b/nixpkgs/nixos/modules/services/mail/postfix.nix
@@ -25,6 +25,8 @@ let
 
   clientRestrictions = concatStringsSep ", " (clientAccess ++ dnsBl);
 
+  smtpTlsSecurityLevel = if cfg.useDane then "dane" else "may";
+
   mainCf = let
     escape = replaceStrings ["$"] ["$$"];
     mkList = items: "\n  " + concatStringsSep ",\n  " items;
@@ -280,6 +282,17 @@ in
         description = "Whether to enable smtp submission.";
       };
 
+      enableSubmissions = mkOption {
+        type = types.bool;
+        default = false;
+        description = ''
+          Whether to enable smtp submission via smtps.
+
+          According to RFC 8314 this should be preferred
+          over STARTTLS for submission of messages by end user clients.
+        '';
+      };
+
       submissionOptions = mkOption {
         type = types.attrs;
         default = {
@@ -298,6 +311,29 @@ in
         description = "Options for the submission config in master.cf";
       };
 
+      submissionsOptions = mkOption {
+        type = types.attrs;
+        default = {
+          smtpd_sasl_auth_enable = "yes";
+          smtpd_client_restrictions = "permit_sasl_authenticated,reject";
+          milter_macro_daemon_name = "ORIGINATING";
+        };
+        example = {
+          smtpd_sasl_auth_enable = "yes";
+          smtpd_sasl_type = "dovecot";
+          smtpd_client_restrictions = "permit_sasl_authenticated,reject";
+          milter_macro_daemon_name = "ORIGINATING";
+        };
+        description = ''
+          Options for the submission config via smtps in master.cf.
+
+          smtpd_tls_security_level will be set to encrypt, if it is missing
+          or has one of the values "may" or "none".
+
+          smtpd_tls_wrappermode with value "yes" will be added automatically.
+        '';
+      };
+
       setSendmail = mkOption {
         type = types.bool;
         default = true;
@@ -454,7 +490,7 @@ in
         '';
         example = {
           mail_owner = "postfix";
-          smtp_use_tls = true;
+          smtp_tls_security_level = "may";
         };
       };
 
@@ -466,16 +502,26 @@ in
         ";
       };
 
-      sslCert = mkOption {
+      tlsTrustedAuthorities = mkOption {
         type = types.str;
-        default = "";
-        description = "SSL certificate to use.";
+        default = "${pkgs.cacert}/etc/ssl/certs/ca-bundle.crt";
+        description = ''
+          File containing trusted certification authorities (CA) to verify certificates of mailservers contacted for mail delivery. This basically sets smtp_tls_CAfile and enables opportunistic tls. Defaults to NixOS trusted certification authorities.
+        '';
+      };
+
+      useDane = mkOption {
+        type = types.bool;
+        default = false;
+        description = ''
+          Sets smtp_tls_security_level to "dane" rather than "may". See postconf(5) for details.
+        '';
       };
 
-      sslCACert = mkOption {
+      sslCert = mkOption {
         type = types.str;
         default = "";
-        description = "SSL certificate of CA.";
+        description = "SSL certificate to use.";
       };
 
       sslKey = mkOption {
@@ -771,18 +817,20 @@ in
         recipient_canonical_classes = [ "envelope_recipient" ];
       }
       // optionalAttrs cfg.enableHeaderChecks { header_checks = [ "regexp:/etc/postfix/header_checks" ]; }
+      // optionalAttrs (cfg.tlsTrustedAuthorities != "") {
+        smtp_tls_CAfile = cfg.tlsTrustedAuthorities;
+        smtp_tls_security_level = smtpTlsSecurityLevel;
+      }
       // optionalAttrs (cfg.sslCert != "") {
-        smtp_tls_CAfile = cfg.sslCACert;
         smtp_tls_cert_file = cfg.sslCert;
         smtp_tls_key_file = cfg.sslKey;
 
-        smtp_use_tls = true;
+        smtp_tls_security_level = smtpTlsSecurityLevel;
 
-        smtpd_tls_CAfile = cfg.sslCACert;
         smtpd_tls_cert_file = cfg.sslCert;
         smtpd_tls_key_file = cfg.sslKey;
 
-        smtpd_use_tls = true;
+        smtpd_tls_security_level = "may";
       };
 
       services.postfix.masterConfig = {
@@ -878,6 +926,23 @@ in
           command = "smtp";
           args = [ "-o" "smtp_fallback_relay=" ];
         };
+      } // optionalAttrs cfg.enableSubmissions {
+        submissions = {
+          type = "inet";
+          private = false;
+          command = "smtpd";
+          args = let
+            mkKeyVal = opt: val: [ "-o" (opt + "=" + val) ];
+            adjustSmtpTlsSecurityLevel = !(cfg.submissionsOptions ? smtpd_tls_security_level) ||
+                                      cfg.submissionsOptions.smtpd_tls_security_level == "none" ||
+                                      cfg.submissionsOptions.smtpd_tls_security_level == "may";
+            submissionsOptions = cfg.submissionsOptions // {
+              smtpd_tls_wrappermode = "yes";
+            } // optionalAttrs adjustSmtpTlsSecurityLevel {
+              smtpd_tls_security_level = "encrypt";
+            };
+          in concatLists (mapAttrsToList mkKeyVal submissionsOptions);
+        };
       };
     }
 
@@ -900,4 +965,9 @@ in
       services.postfix.mapFiles.client_access = checkClientAccessFile;
     })
   ]);
+
+  imports = [
+   (mkRemovedOptionModule [ "services" "postfix" "sslCACert" ]
+     "services.postfix.sslCACert was replaced by services.postfix.tlsTrustedAuthorities. In case you intend that your server should validate requested client certificates use services.postfix.extraConfig.")
+  ];
 }
diff --git a/nixpkgs/nixos/modules/services/mail/roundcube.nix b/nixpkgs/nixos/modules/services/mail/roundcube.nix
index ed1439745ac9..a0bbab64985b 100644
--- a/nixpkgs/nixos/modules/services/mail/roundcube.nix
+++ b/nixpkgs/nixos/modules/services/mail/roundcube.nix
@@ -95,6 +95,18 @@ in
       '';
     };
 
+    maxAttachmentSize = mkOption {
+      type = types.int;
+      default = 18;
+      description = ''
+        The maximum attachment size in MB.
+
+        Note: Since roundcube only uses 70% of max upload values configured in php
+        30% is added automatically to <xref linkend="opt-services.roundcube.maxAttachmentSize"/>.
+      '';
+      apply = configuredMaxAttachmentSize: "${toString (configuredMaxAttachmentSize * 1.3)}M";
+    };
+
     extraConfig = mkOption {
       type = types.lines;
       default = "";
@@ -115,7 +127,7 @@ in
       $config = array();
       $config['db_dsnw'] = 'pgsql://${cfg.database.username}${lib.optionalString (!localDB) ":' . $password . '"}@${if localDB then "unix(/run/postgresql)" else cfg.database.host}/${cfg.database.dbname}';
       $config['log_driver'] = 'syslog';
-      $config['max_message_size'] = '25M';
+      $config['max_message_size'] =  '${cfg.maxAttachmentSize}';
       $config['plugins'] = [${concatMapStringsSep "," (p: "'${p}'") cfg.plugins}];
       $config['des_key'] = file_get_contents('/var/lib/roundcube/des_key');
       $config['mime_types'] = '${pkgs.nginx}/conf/mime.types';
@@ -172,8 +184,8 @@ in
       phpOptions = ''
         error_log = 'stderr'
         log_errors = on
-        post_max_size = 25M
-        upload_max_filesize = 25M
+        post_max_size = ${cfg.maxAttachmentSize}
+        upload_max_filesize = ${cfg.maxAttachmentSize}
       '';
       settings = mapAttrs (name: mkDefault) {
         "listen.owner" = "nginx";
diff --git a/nixpkgs/nixos/modules/services/misc/beanstalkd.nix b/nixpkgs/nixos/modules/services/misc/beanstalkd.nix
index bcd133c97411..1c674a5b23bf 100644
--- a/nixpkgs/nixos/modules/services/misc/beanstalkd.nix
+++ b/nixpkgs/nixos/modules/services/misc/beanstalkd.nix
@@ -28,6 +28,12 @@ in
           example = "0.0.0.0";
         };
       };
+
+      openFirewall = mkOption {
+        type = types.bool;
+        default = false;
+        description = "Whether to open ports in the firewall for the server.";
+      };
     };
   };
 
@@ -35,6 +41,10 @@ in
 
   config = mkIf cfg.enable {
 
+    networking.firewall = mkIf cfg.openFirewall {
+      allowedTCPPorts = [ cfg.listen.port ];
+    };
+
     environment.systemPackages = [ pkg ];
 
     systemd.services.beanstalkd = {
diff --git a/nixpkgs/nixos/modules/services/misc/calibre-server.nix b/nixpkgs/nixos/modules/services/misc/calibre-server.nix
index 84c04f403d3a..2467d34b524a 100644
--- a/nixpkgs/nixos/modules/services/misc/calibre-server.nix
+++ b/nixpkgs/nixos/modules/services/misc/calibre-server.nix
@@ -9,24 +9,42 @@ let
 in
 
 {
+  imports = [
+    (mkChangedOptionModule [ "services" "calibre-server" "libraryDir" ] [ "services" "calibre-server" "libraries" ]
+      (config:
+        let libraryDir = getAttrFromPath [ "services" "calibre-server" "libraryDir" ] config;
+        in [ libraryDir ]
+      )
+    )
+  ];
 
   ###### interface
 
   options = {
-
     services.calibre-server = {
 
       enable = mkEnableOption "calibre-server";
 
-      libraryDir = mkOption {
+      libraries = mkOption {
         description = ''
-          The directory where the Calibre library to serve is.
-          '';
-          type = types.path;
+          The directories of the libraries to serve. They must be readable for the user under which the server runs.
+        '';
+        type = types.listOf types.path;
       };
 
-    };
+      user = mkOption {
+        description = "The user under which calibre-server runs.";
+        type = types.str;
+        default = "calibre-server";
+      };
+
+      group = mkOption {
+        description = "The group under which calibre-server runs.";
+        type = types.str;
+        default = "calibre-server";
+      };
 
+    };
   };
 
 
@@ -34,29 +52,34 @@ in
 
   config = mkIf cfg.enable {
 
-    systemd.services.calibre-server =
-      {
+    systemd.services.calibre-server = {
         description = "Calibre Server";
         after = [ "network.target" ];
         wantedBy = [ "multi-user.target" ];
         serviceConfig = {
-          User = "calibre-server";
+          User = cfg.user;
           Restart = "always";
-          ExecStart = "${pkgs.calibre}/bin/calibre-server ${cfg.libraryDir}";
+          ExecStart = "${pkgs.calibre}/bin/calibre-server ${lib.concatStringsSep " " cfg.libraries}";
         };
 
       };
 
     environment.systemPackages = [ pkgs.calibre ];
 
-    users.users.calibre-server = {
+    users.users = optionalAttrs (cfg.user == "calibre-server") {
+      calibre-server = {
+        home = "/var/lib/calibre-server";
+        createHome = true;
         uid = config.ids.uids.calibre-server;
-        group = "calibre-server";
+        group = cfg.group;
       };
+    };
 
-    users.groups.calibre-server = {
+    users.groups = optionalAttrs (cfg.group == "calibre-server") {
+      calibre-server = {
         gid = config.ids.gids.calibre-server;
       };
+    };
 
   };
 
diff --git a/nixpkgs/nixos/modules/services/misc/gammu-smsd.nix b/nixpkgs/nixos/modules/services/misc/gammu-smsd.nix
index 3057d7fd1a09..552725f1384d 100644
--- a/nixpkgs/nixos/modules/services/misc/gammu-smsd.nix
+++ b/nixpkgs/nixos/modules/services/misc/gammu-smsd.nix
@@ -172,7 +172,7 @@ in {
           };
 
           database = mkOption {
-            type = types.str;
+            type = types.nullOr types.str;
             default = null;
             description = "Database name to store sms data";
           };
diff --git a/nixpkgs/nixos/modules/services/misc/gitea.nix b/nixpkgs/nixos/modules/services/misc/gitea.nix
index f8bcedc94fe2..af80e99746be 100644
--- a/nixpkgs/nixos/modules/services/misc/gitea.nix
+++ b/nixpkgs/nixos/modules/services/misc/gitea.nix
@@ -162,6 +162,45 @@ in
             <manvolnum>7</manvolnum></citerefentry>.
           '';
         };
+
+        backupDir = mkOption {
+          type = types.str;
+          default = "${cfg.stateDir}/dump";
+          description = "Path to the dump files.";
+        };
+      };
+
+      ssh = {
+        enable = mkOption {
+          type = types.bool;
+          default = true;
+          description = "Enable external SSH feature.";
+        };
+
+        clonePort = mkOption {
+          type = types.int;
+          default = 22;
+          example = 2222;
+          description = ''
+            SSH port displayed in clone URL.
+            The option is required to configure a service when the external visible port
+            differs from the local listening port i.e. if port forwarding is used.
+          '';
+        };
+      };
+
+      lfs = {
+        enable = mkOption {
+          type = types.bool;
+          default = false;
+          description = "Enables git-lfs support.";
+        };
+
+        contentDir = mkOption {
+          type = types.str;
+          default = "${cfg.stateDir}/data/lfs";
+          description = "Where to store LFS files.";
+        };
       };
 
       appName = mkOption {
@@ -200,6 +239,12 @@ in
         description = "HTTP listen port.";
       };
 
+      enableUnixSocket = mkOption {
+        type = types.bool;
+        default = false;
+        description = "Configure Gitea to listen on a unix socket instead of the default TCP port.";
+      };
+
       cookieSecure = mkOption {
         type = types.bool;
         default = false;
@@ -300,14 +345,34 @@ in
         ROOT = cfg.repositoryRoot;
       };
 
-      server = {
-        DOMAIN = cfg.domain;
-        HTTP_ADDR = cfg.httpAddress;
-        HTTP_PORT = cfg.httpPort;
-        ROOT_URL = cfg.rootUrl;
-        STATIC_ROOT_PATH = cfg.staticRootPath;
-        LFS_JWT_SECRET = "#jwtsecret#";
-      };
+      server = mkMerge [
+        {
+          DOMAIN = cfg.domain;
+          STATIC_ROOT_PATH = cfg.staticRootPath;
+          LFS_JWT_SECRET = "#jwtsecret#";
+          ROOT_URL = cfg.rootUrl;
+        }
+        (mkIf cfg.enableUnixSocket {
+          PROTOCOL = "unix";
+          HTTP_ADDR = "/run/gitea/gitea.sock";
+        })
+        (mkIf (!cfg.enableUnixSocket) {
+          HTTP_ADDR = cfg.httpAddress;
+          HTTP_PORT = cfg.httpPort;
+        })
+        (mkIf cfg.ssh.enable {
+          DISABLE_SSH = false;
+          SSH_PORT = cfg.ssh.clonePort;
+        })
+        (mkIf (!cfg.ssh.enable) {
+          DISABLE_SSH = true;
+        })
+        (mkIf cfg.lfs.enable {
+          LFS_START_SERVER = true;
+          LFS_CONTENT_PATH = cfg.lfs.contentDir;
+        })
+
+      ];
 
       session = {
         COOKIE_NAME = "session";
@@ -357,12 +422,26 @@ in
     };
 
     systemd.tmpfiles.rules = [
-      "d '${cfg.stateDir}' - ${cfg.user} gitea - -"
-      "d '${cfg.stateDir}/conf' - ${cfg.user} gitea - -"
-      "d '${cfg.stateDir}/custom' - ${cfg.user} gitea - -"
-      "d '${cfg.stateDir}/custom/conf' - ${cfg.user} gitea - -"
-      "d '${cfg.stateDir}/log' - ${cfg.user} gitea - -"
-      "d '${cfg.repositoryRoot}' - ${cfg.user} gitea - -"
+      "d '${cfg.dump.backupDir}' 0750 ${cfg.user} gitea - -"
+      "z '${cfg.dump.backupDir}' 0750 ${cfg.user} gitea - -"
+      "Z '${cfg.dump.backupDir}' - ${cfg.user} gitea - -"
+      "d '${cfg.lfs.contentDir}' 0750 ${cfg.user} gitea - -"
+      "z '${cfg.lfs.contentDir}' 0750 ${cfg.user} gitea - -"
+      "Z '${cfg.lfs.contentDir}' - ${cfg.user} gitea - -"
+      "d '${cfg.repositoryRoot}' 0750 ${cfg.user} gitea - -"
+      "z '${cfg.repositoryRoot}' 0750 ${cfg.user} gitea - -"
+      "Z '${cfg.repositoryRoot}' - ${cfg.user} gitea - -"
+      "d '${cfg.stateDir}' 0750 ${cfg.user} gitea - -"
+      "d '${cfg.stateDir}/conf' 0750 ${cfg.user} gitea - -"
+      "d '${cfg.stateDir}/custom' 0750 ${cfg.user} gitea - -"
+      "d '${cfg.stateDir}/custom/conf' 0750 ${cfg.user} gitea - -"
+      "d '${cfg.stateDir}/log' 0750 ${cfg.user} gitea - -"
+      "z '${cfg.stateDir}' 0750 ${cfg.user} gitea - -"
+      "z '${cfg.stateDir}/.ssh' 0700 ${cfg.user} gitea - -"
+      "z '${cfg.stateDir}/conf' 0750 ${cfg.user} gitea - -"
+      "z '${cfg.stateDir}/custom' 0750 ${cfg.user} gitea - -"
+      "z '${cfg.stateDir}/custom/conf' 0750 ${cfg.user} gitea - -"
+      "z '${cfg.stateDir}/log' 0750 ${cfg.user} gitea - -"
       "Z '${cfg.stateDir}' - ${cfg.user} gitea - -"
 
       # If we have a folder or symlink with gitea locales, remove it
@@ -431,28 +510,39 @@ in
         User = cfg.user;
         Group = "gitea";
         WorkingDirectory = cfg.stateDir;
-        ExecStart = "${gitea}/bin/gitea web";
+        ExecStart = "${gitea}/bin/gitea web --pid /run/gitea/gitea.pid";
         Restart = "always";
-
-        # Filesystem
+        # Runtime directory and mode
+        RuntimeDirectory = "gitea";
+        RuntimeDirectoryMode = "0755";
+        # Access write directories
+        ReadWritePaths = [ cfg.dump.backupDir cfg.repositoryRoot cfg.stateDir cfg.lfs.contentDir ];
+        UMask = "0027";
+        # Capabilities
+        CapabilityBoundingSet = "";
+        # Security
+        NoNewPrivileges = true;
+        # Sandboxing
+        ProtectSystem = "strict";
         ProtectHome = true;
+        PrivateTmp = true;
         PrivateDevices = true;
+        PrivateUsers = true;
+        ProtectHostname = true;
+        ProtectClock = true;
         ProtectKernelTunables = true;
         ProtectKernelModules = true;
+        ProtectKernelLogs = true;
         ProtectControlGroups = true;
-        ReadWritePaths = cfg.stateDir;
-        # Caps
-        CapabilityBoundingSet = "";
-        NoNewPrivileges = true;
-        # Misc.
+        RestrictAddressFamilies = [ "AF_UNIX AF_INET AF_INET6" ];
         LockPersonality = true;
+        MemoryDenyWriteExecute = true;
         RestrictRealtime = true;
+        RestrictSUIDSGID = true;
         PrivateMounts = true;
-        PrivateUsers = true;
-        MemoryDenyWriteExecute = true;
-        SystemCallFilter = "~@clock @cpu-emulation @debug @keyring @memlock @module @mount @obsolete @raw-io @reboot @resources @setuid @swap";
+        # System Call Filtering
         SystemCallArchitectures = "native";
-        RestrictAddressFamilies = "AF_UNIX AF_INET AF_INET6";
+        SystemCallFilter = "~@clock @cpu-emulation @debug @keyring @memlock @module @mount @obsolete @raw-io @reboot @resources @setuid @swap";
       };
 
       environment = {
@@ -504,7 +594,7 @@ in
          Type = "oneshot";
          User = cfg.user;
          ExecStart = "${gitea}/bin/gitea dump";
-         WorkingDirectory = cfg.stateDir;
+         WorkingDirectory = cfg.dump.backupDir;
        };
     };
 
diff --git a/nixpkgs/nixos/modules/services/misc/gitlab.nix b/nixpkgs/nixos/modules/services/misc/gitlab.nix
index 1ada131bd7ba..9896b8023e44 100644
--- a/nixpkgs/nixos/modules/services/misc/gitlab.nix
+++ b/nixpkgs/nixos/modules/services/misc/gitlab.nix
@@ -54,7 +54,7 @@ let
     '') gitlabConfig.production.repositories.storages))}
   '';
 
-  gitlabShellConfig = {
+  gitlabShellConfig = flip recursiveUpdate cfg.extraShellConfig {
     user = cfg.user;
     gitlab_url = "http+unix://${pathUrlQuote gitlabSocket}";
     http_settings.self_signed_cert = false;
@@ -71,7 +71,7 @@ let
     };
   };
 
-  redisConfig.production.url = "redis://localhost:6379/";
+  redisConfig.production.url = cfg.redisUrl;
 
   gitlabConfig = {
     # These are the default settings from config/gitlab.example.yml
@@ -311,6 +311,12 @@ in {
         description = "Extra configuration in config/database.yml.";
       };
 
+      redisUrl = mkOption {
+        type = types.str;
+        default = "redis://localhost:6379/";
+        description = "Redis URL for all GitLab services except gitlab-shell";
+      };
+
       extraGitlabRb = mkOption {
         type = types.str;
         default = "";
@@ -511,6 +517,12 @@ in {
         '';
       };
 
+      extraShellConfig = mkOption {
+        type = types.attrs;
+        default = {};
+        description = "Extra configuration to merge into shell-config.yml";
+      };
+
       extraConfig = mkOption {
         type = types.attrs;
         default = {};
@@ -612,26 +624,38 @@ in {
       enable = true;
       ensureUsers = singleton { name = cfg.databaseUsername; };
     };
+
     # The postgresql module doesn't currently support concepts like
     # objects owners and extensions; for now we tack on what's needed
     # here.
-    systemd.services.postgresql.postStart = mkAfter (optionalString databaseActuallyCreateLocally ''
-      set -eu
-
-      $PSQL -tAc "SELECT 1 FROM pg_database WHERE datname = '${cfg.databaseName}'" | grep -q 1 || $PSQL -tAc 'CREATE DATABASE "${cfg.databaseName}" OWNER "${cfg.databaseUsername}"'
-      current_owner=$($PSQL -tAc "SELECT pg_catalog.pg_get_userbyid(datdba) FROM pg_catalog.pg_database WHERE datname = '${cfg.databaseName}'")
-      if [[ "$current_owner" != "${cfg.databaseUsername}" ]]; then
-          $PSQL -tAc 'ALTER DATABASE "${cfg.databaseName}" OWNER TO "${cfg.databaseUsername}"'
-          if [[ -e "${config.services.postgresql.dataDir}/.reassigning_${cfg.databaseName}" ]]; then
-              echo "Reassigning ownership of database ${cfg.databaseName} to user ${cfg.databaseUsername} failed on last boot. Failing..."
-              exit 1
-          fi
-          touch "${config.services.postgresql.dataDir}/.reassigning_${cfg.databaseName}"
-          $PSQL "${cfg.databaseName}" -tAc "REASSIGN OWNED BY \"$current_owner\" TO \"${cfg.databaseUsername}\""
-          rm "${config.services.postgresql.dataDir}/.reassigning_${cfg.databaseName}"
-      fi
-      $PSQL '${cfg.databaseName}' -tAc "CREATE EXTENSION IF NOT EXISTS pg_trgm"
-    '');
+    systemd.services.gitlab-postgresql = let pgsql = config.services.postgresql; in mkIf databaseActuallyCreateLocally {
+      after = [ "postgresql.service" ];
+      wantedBy = [ "multi-user.target" ];
+      path = [ pgsql.package ];
+      script = ''
+        set -eu
+
+        PSQL="${pkgs.utillinux}/bin/runuser -u ${pgsql.superUser} -- psql --port=${toString pgsql.port}"
+
+        $PSQL -tAc "SELECT 1 FROM pg_database WHERE datname = '${cfg.databaseName}'" | grep -q 1 || $PSQL -tAc 'CREATE DATABASE "${cfg.databaseName}" OWNER "${cfg.databaseUsername}"'
+        current_owner=$($PSQL -tAc "SELECT pg_catalog.pg_get_userbyid(datdba) FROM pg_catalog.pg_database WHERE datname = '${cfg.databaseName}'")
+        if [[ "$current_owner" != "${cfg.databaseUsername}" ]]; then
+            $PSQL -tAc 'ALTER DATABASE "${cfg.databaseName}" OWNER TO "${cfg.databaseUsername}"'
+            if [[ -e "${config.services.postgresql.dataDir}/.reassigning_${cfg.databaseName}" ]]; then
+                echo "Reassigning ownership of database ${cfg.databaseName} to user ${cfg.databaseUsername} failed on last boot. Failing..."
+                exit 1
+            fi
+            touch "${config.services.postgresql.dataDir}/.reassigning_${cfg.databaseName}"
+            $PSQL "${cfg.databaseName}" -tAc "REASSIGN OWNED BY \"$current_owner\" TO \"${cfg.databaseUsername}\""
+            rm "${config.services.postgresql.dataDir}/.reassigning_${cfg.databaseName}"
+        fi
+        $PSQL '${cfg.databaseName}' -tAc "CREATE EXTENSION IF NOT EXISTS pg_trgm"
+      '';
+
+      serviceConfig = {
+        Type = "oneshot";
+      };
+    };
 
     # Use postfix to send out mails.
     services.postfix.enable = mkDefault true;
@@ -678,7 +702,6 @@ in {
       "L+ /run/gitlab/shell-config.yml - - - - ${pkgs.writeText "config.yml" (builtins.toJSON gitlabShellConfig)}"
 
       "L+ ${cfg.statePath}/config/unicorn.rb - - - - ${./defaultUnicornConfig.rb}"
-      "L+ ${cfg.statePath}/config/initializers/extra-gitlab.rb - - - - ${extraGitlabRb}"
     ];
 
     systemd.services.gitlab-sidekiq = {
@@ -704,7 +727,7 @@ in {
         TimeoutSec = "infinity";
         Restart = "on-failure";
         WorkingDirectory = "${cfg.packages.gitlab}/share/gitlab";
-        ExecStart="${cfg.packages.gitlab.rubyEnv}/bin/sidekiq -C \"${cfg.packages.gitlab}/share/gitlab/config/sidekiq_queues.yml\" -e production -P ${cfg.statePath}/tmp/sidekiq.pid";
+        ExecStart="${cfg.packages.gitlab.rubyEnv}/bin/sidekiq -C \"${cfg.packages.gitlab}/share/gitlab/config/sidekiq_queues.yml\" -e production";
       };
     };
 
@@ -760,8 +783,25 @@ in {
       };
     };
 
+    systemd.services.gitlab-mailroom = mkIf (gitlabConfig.production.incoming_email.enabled or false) {
+      description = "GitLab incoming mail daemon";
+      after = [ "network.target" "redis.service" "gitlab.service" ]; # gitlab.service creates configs
+      wantedBy = [ "multi-user.target" ];
+      environment = gitlabEnv;
+      serviceConfig = {
+        Type = "simple";
+        TimeoutSec = "infinity";
+        Restart = "on-failure";
+
+        User = cfg.user;
+        Group = cfg.group;
+        ExecStart = "${cfg.packages.gitlab.rubyEnv}/bin/bundle exec mail_room -c ${cfg.packages.gitlab}/share/gitlab/config.dist/mail_room.yml";
+        WorkingDirectory = gitlabEnv.HOME;
+      };
+    };
+
     systemd.services.gitlab = {
-      after = [ "gitlab-workhorse.service" "gitaly.service" "network.target" "postgresql.service" "redis.service" ];
+      after = [ "gitlab-workhorse.service" "gitaly.service" "network.target" "gitlab-postgresql.service" "redis.service" ];
       requires = [ "gitlab-sidekiq.service" ];
       wantedBy = [ "multi-user.target" ];
       environment = gitlabEnv;
@@ -798,6 +838,7 @@ in {
             rm -f ${cfg.statePath}/lib
             cp -rf --no-preserve=mode ${cfg.packages.gitlab}/share/gitlab/config.dist/* ${cfg.statePath}/config
             cp -rf --no-preserve=mode ${cfg.packages.gitlab}/share/gitlab/db/* ${cfg.statePath}/db
+            ln -sf ${extraGitlabRb} ${cfg.statePath}/config/initializers/extra-gitlab.rb
 
             ${cfg.packages.gitlab-shell}/bin/install
 
diff --git a/nixpkgs/nixos/modules/services/misc/gitlab.xml b/nixpkgs/nixos/modules/services/misc/gitlab.xml
index b6171a9a194c..19a3df0a5f66 100644
--- a/nixpkgs/nixos/modules/services/misc/gitlab.xml
+++ b/nixpkgs/nixos/modules/services/misc/gitlab.xml
@@ -98,6 +98,12 @@ services.gitlab = {
   </para>
 
   <para>
+    When <literal>icoming_mail.enabled</literal> is set to <literal>true</literal>
+    in <link linkend="opt-services.gitlab.extraConfig">extraConfig</link> an additional
+    service called <literal>gitlab-mailroom</literal> is enabled for fetching incoming mail.
+  </para>
+
+  <para>
    Refer to <xref linkend="ch-options" /> for all available configuration
    options for the
    <link linkend="opt-services.gitlab.enable">services.gitlab</link> module.
diff --git a/nixpkgs/nixos/modules/services/misc/gitolite.nix b/nixpkgs/nixos/modules/services/misc/gitolite.nix
index cc69f81bbcc4..59cbdac319c8 100644
--- a/nixpkgs/nixos/modules/services/misc/gitolite.nix
+++ b/nixpkgs/nixos/modules/services/misc/gitolite.nix
@@ -27,7 +27,10 @@ in
         type = types.str;
         default = "/var/lib/gitolite";
         description = ''
-          Gitolite home directory (used to store all the repositories).
+          The gitolite home directory used to store all repositories. If left as the default value
+          this directory will automatically be created before the gitolite server starts, otherwise
+          the sysadmin is responsible for ensuring the directory exists with appropriate ownership
+          and permissions.
         '';
       };
 
@@ -149,14 +152,6 @@ in
     };
     users.groups.${cfg.group}.gid = config.ids.gids.gitolite;
 
-    systemd.tmpfiles.rules = [
-      "d '${cfg.dataDir}' 0750 ${cfg.user} ${cfg.group} - -"
-      "d '${cfg.dataDir}'/.gitolite - ${cfg.user} ${cfg.group} - -"
-      "d '${cfg.dataDir}'/.gitolite/logs - ${cfg.user} ${cfg.group} - -"
-
-      "Z ${cfg.dataDir} 0750 ${cfg.user} ${cfg.group} - -"
-    ];
-
     systemd.services.gitolite-init = {
       description = "Gitolite initialization";
       wantedBy    = [ "multi-user.target" ];
@@ -167,13 +162,19 @@ in
         GITOLITE_RC_DEFAULT = "${rcDir}/gitolite.rc.default";
       };
 
-      serviceConfig = {
-        Type = "oneshot";
-        User = cfg.user;
-        Group = cfg.group;
-        WorkingDirectory = "~";
-        RemainAfterExit = true;
-      };
+      serviceConfig = mkMerge [
+        (mkIf (cfg.dataDir == "/var/lib/gitolite") {
+          StateDirectory = "gitolite gitolite/.gitolite gitolite/.gitolite/logs";
+          StateDirectoryMode = "0750";
+        })
+        {
+          Type = "oneshot";
+          User = cfg.user;
+          Group = cfg.group;
+          WorkingDirectory = "~";
+          RemainAfterExit = true;
+        }
+      ];
 
       path = [ pkgs.gitolite pkgs.git pkgs.perl pkgs.bash pkgs.diffutils config.programs.ssh.package ];
       script =
diff --git a/nixpkgs/nixos/modules/services/misc/gollum.nix b/nixpkgs/nixos/modules/services/misc/gollum.nix
index f4a9c72b1545..0c9c7548305b 100644
--- a/nixpkgs/nixos/modules/services/misc/gollum.nix
+++ b/nixpkgs/nixos/modules/services/misc/gollum.nix
@@ -50,6 +50,12 @@ in
       description = "Parse and interpret emoji tags";
     };
 
+    h1-title = mkOption {
+      type = types.bool;
+      default = false;
+      description = "Use the first h1 as page title";
+    };
+
     branch = mkOption {
       type = types.str;
       default = "master";
@@ -98,10 +104,11 @@ in
           ${pkgs.gollum}/bin/gollum \
             --port ${toString cfg.port} \
             --host ${cfg.address} \
-            --config ${builtins.toFile "gollum-config.rb" cfg.extraConfig} \
+            --config ${pkgs.writeText "gollum-config.rb" cfg.extraConfig} \
             --ref ${cfg.branch} \
             ${optionalString cfg.mathjax "--mathjax"} \
             ${optionalString cfg.emoji "--emoji"} \
+            ${optionalString cfg.h1-title "--h1-title"} \
             ${optionalString (cfg.allowUploads != null) "--allow-uploads ${cfg.allowUploads}"} \
             ${cfg.stateDir}
         '';
diff --git a/nixpkgs/nixos/modules/services/misc/home-assistant.nix b/nixpkgs/nixos/modules/services/misc/home-assistant.nix
index 8ce2437841b0..0477254e7c18 100644
--- a/nixpkgs/nixos/modules/services/misc/home-assistant.nix
+++ b/nixpkgs/nixos/modules/services/misc/home-assistant.nix
@@ -240,6 +240,7 @@ in {
       '');
       serviceConfig = {
         ExecStart = "${package}/bin/hass --config '${cfg.configDir}'";
+        ExecReload = "${pkgs.coreutils}/bin/kill -HUP $MAINPID";
         User = "hass";
         Group = "hass";
         Restart = "on-failure";
diff --git a/nixpkgs/nixos/modules/services/misc/jellyfin.nix b/nixpkgs/nixos/modules/services/misc/jellyfin.nix
index 6ecdfb57dc35..0493dadea94e 100644
--- a/nixpkgs/nixos/modules/services/misc/jellyfin.nix
+++ b/nixpkgs/nixos/modules/services/misc/jellyfin.nix
@@ -16,6 +16,14 @@ in
         description = "User account under which Jellyfin runs.";
       };
 
+      package = mkOption {
+        type = types.package;
+        example = literalExample "pkgs.jellyfin";
+        description = ''
+          Jellyfin package to use.
+        '';
+      };
+
       group = mkOption {
         type = types.str;
         default = "jellyfin";
@@ -35,11 +43,16 @@ in
         Group = cfg.group;
         StateDirectory = "jellyfin";
         CacheDirectory = "jellyfin";
-        ExecStart = "${pkgs.jellyfin}/bin/jellyfin --datadir '/var/lib/${StateDirectory}' --cachedir '/var/cache/${CacheDirectory}'";
+        ExecStart = "${cfg.package}/bin/jellyfin --datadir '/var/lib/${StateDirectory}' --cachedir '/var/cache/${CacheDirectory}'";
         Restart = "on-failure";
       };
     };
 
+    services.jellyfin.package = mkDefault (
+      if versionAtLeast config.system.stateVersion "20.09" then pkgs.jellyfin
+        else pkgs.jellyfin_10_5
+    );
+
     users.users = mkIf (cfg.user == "jellyfin") {
       jellyfin = {
         group = cfg.group;
diff --git a/nixpkgs/nixos/modules/services/misc/mathics.nix b/nixpkgs/nixos/modules/services/misc/mathics.nix
deleted file mode 100644
index c588a30d76cd..000000000000
--- a/nixpkgs/nixos/modules/services/misc/mathics.nix
+++ /dev/null
@@ -1,54 +0,0 @@
-{ pkgs, lib, config, ... }:
-
-with lib;
-
-let
-  cfg = config.services.mathics;
-
-in {
-  options = {
-    services.mathics = {
-      enable = mkEnableOption "Mathics notebook service";
-
-      external = mkOption {
-        type = types.bool;
-        default = false;
-        description = "Listen on all interfaces, rather than just localhost?";
-      };
-
-      port = mkOption {
-        type = types.int;
-        default = 8000;
-        description = "TCP port to listen on.";
-      };
-    };
-  };
-
-  config = mkIf cfg.enable {
-
-    users.users.mathics = {
-      group = config.users.groups.mathics.name;
-      description = "Mathics user";
-      home = "/var/lib/mathics";
-      createHome = true;
-      uid = config.ids.uids.mathics;
-    };
-
-    users.groups.mathics.gid = config.ids.gids.mathics;
-
-    systemd.services.mathics = {
-      description = "Mathics notebook server";
-      wantedBy = [ "multi-user.target" ];
-      after = [ "network.target" ];
-      serviceConfig = {
-        User = config.users.users.mathics.name;
-        Group = config.users.groups.mathics.name;
-        ExecStart = concatStringsSep " " [
-          "${pkgs.mathics}/bin/mathicsserver"
-          "--port" (toString cfg.port)
-          (if cfg.external then "--external" else "")
-        ];
-      };
-    };
-  };
-}
diff --git a/nixpkgs/nixos/modules/services/misc/matrix-synapse.nix b/nixpkgs/nixos/modules/services/misc/matrix-synapse.nix
index e982eb16fa70..3eb1073387fe 100644
--- a/nixpkgs/nixos/modules/services/misc/matrix-synapse.nix
+++ b/nixpkgs/nixos/modules/services/misc/matrix-synapse.nix
@@ -675,7 +675,7 @@ in {
       }
     ];
 
-    users.users.matrix-synapse = { 
+    users.users.matrix-synapse = {
         group = "matrix-synapse";
         home = cfg.dataDir;
         createHome = true;
diff --git a/nixpkgs/nixos/modules/services/misc/matrix-synapse.xml b/nixpkgs/nixos/modules/services/misc/matrix-synapse.xml
index 2f2ac27eeb9d..fbfa838b168b 100644
--- a/nixpkgs/nixos/modules/services/misc/matrix-synapse.xml
+++ b/nixpkgs/nixos/modules/services/misc/matrix-synapse.xml
@@ -14,9 +14,9 @@
  <para>
   This chapter will show you how to set up your own, self-hosted Matrix
   homeserver using the Synapse reference homeserver, and how to serve your own
-  copy of the Riot web client. See the
+  copy of the Element web client. See the
   <link xlink:href="https://matrix.org/docs/projects/try-matrix-now.html">Try
-  Matrix Now!</link> overview page for links to Riot Apps for Android and iOS,
+  Matrix Now!</link> overview page for links to Element Apps for Android and iOS,
   desktop clients, as well as bridges to other networks and other projects
   around Matrix.
  </para>
@@ -84,7 +84,7 @@ in {
               "m.homeserver" =  { "base_url" = "https://${fqdn}"; };
               "m.identity_server" =  { "base_url" = "https://vector.im"; };
             };
-          # ACAO required to allow riot-web on any URL to request this json file
+          # ACAO required to allow element-web on any URL to request this json file
           in ''
             add_header Content-Type application/json;
             add_header Access-Control-Allow-Origin *;
@@ -98,7 +98,7 @@ in {
         <link linkend="opt-services.nginx.virtualHosts._name_.forceSSL">forceSSL</link> = true;
 
         # Or do a redirect instead of the 404, or whatever is appropriate for you.
-        # But do not put a Matrix Web client here! See the Riot Web section below.
+        # But do not put a Matrix Web client here! See the Element web section below.
         <link linkend="opt-services.nginx.virtualHosts._name_.locations._name_.extraConfig">locations."/".extraConfig</link> = ''
           return 404;
         '';
@@ -171,17 +171,19 @@ Success!
    option until a better solution for NixOS is in place.
   </para>
  </section>
- <section xml:id="module-services-matrix-riot-web">
-  <title>Riot Web Client</title>
+ <section xml:id="module-services-matrix-element-web">
+  <title>Element (formerly known as Riot) Web Client</title>
 
   <para>
-   <link xlink:href="https://github.com/vector-im/riot-web/">Riot Web</link> is
+   <link xlink:href="https://github.com/vector-im/riot-web/">Element Web</link> is
    the reference web client for Matrix and developed by the core team at
-   matrix.org. The following snippet can be optionally added to the code before
+   matrix.org. Element was formerly known as Riot.im, see the
+   <link xlink:href="https://element.io/blog/welcome-to-element/">Element introductory blog post</link>
+   for more information. The following snippet can be optionally added to the code before
    to complete the synapse installation with a web client served at
-   <code>https://riot.myhostname.example.org</code> and
-   <code>https://riot.example.org</code>. Alternatively, you can use the hosted
-   copy at <link xlink:href="https://riot.im/app">https://riot.im/app</link>,
+   <code>https://element.myhostname.example.org</code> and
+   <code>https://element.example.org</code>. Alternatively, you can use the hosted
+   copy at <link xlink:href="https://app.element.io/">https://app.element.io/</link>,
    or use other web clients or native client applications. Due to the
    <literal>/.well-known</literal> urls set up done above, many clients should
    fill in the required connection details automatically when you enter your
@@ -191,14 +193,14 @@ Success!
    featureset.
 <programlisting>
 {
-  services.nginx.virtualHosts."riot.${fqdn}" = {
+  services.nginx.virtualHosts."element.${fqdn}" = {
     <link linkend="opt-services.nginx.virtualHosts._name_.enableACME">enableACME</link> = true;
     <link linkend="opt-services.nginx.virtualHosts._name_.forceSSL">forceSSL</link> = true;
     <link linkend="opt-services.nginx.virtualHosts._name_.serverAliases">serverAliases</link> = [
-      "riot.${config.networking.domain}"
+      "element.${config.networking.domain}"
     ];
 
-    <link linkend="opt-services.nginx.virtualHosts._name_.root">root</link> = pkgs.riot-web.override {
+    <link linkend="opt-services.nginx.virtualHosts._name_.root">root</link> = pkgs.element-web.override {
       conf = {
         default_server_config."m.homeserver" = {
           "base_url" = "${config.networking.domain}";
@@ -212,13 +214,13 @@ Success!
   </para>
 
   <para>
-   Note that the Riot developers do not recommend running Riot and your Matrix
+   Note that the Element developers do not recommend running Element and your Matrix
    homeserver on the same fully-qualified domain name for security reasons. In
    the example, this means that you should not reuse the
-   <literal>myhostname.example.org</literal> virtualHost to also serve Riot,
+   <literal>myhostname.example.org</literal> virtualHost to also serve Element,
    but instead serve it on a different subdomain, like
-   <literal>riot.example.org</literal> in the example. See the
-   <link xlink:href="https://github.com/vector-im/riot-web#important-security-note">Riot
+   <literal>element.example.org</literal> in the example. See the
+   <link xlink:href="https://github.com/vector-im/riot-web#important-security-note">Element
    Important Security Notes</link> for more information on this subject.
   </para>
  </section>
diff --git a/nixpkgs/nixos/modules/services/misc/mautrix-telegram.nix b/nixpkgs/nixos/modules/services/misc/mautrix-telegram.nix
index 78a42fbb574b..c5e8a5b85ec2 100644
--- a/nixpkgs/nixos/modules/services/misc/mautrix-telegram.nix
+++ b/nixpkgs/nixos/modules/services/misc/mautrix-telegram.nix
@@ -125,7 +125,7 @@ in {
         if [ ! -f '${registrationFile}' ]; then
           ${pkgs.mautrix-telegram}/bin/mautrix-telegram \
             --generate-registration \
-            --base-config='${pkgs.mautrix-telegram}/example-config.yaml' \
+            --base-config='${pkgs.mautrix-telegram}/${pkgs.mautrix-telegram.pythonModule.sitePackages}/mautrix_telegram/example-config.yaml' \
             --config='${settingsFile}' \
             --registration='${registrationFile}'
         fi
diff --git a/nixpkgs/nixos/modules/services/misc/mesos-master.nix b/nixpkgs/nixos/modules/services/misc/mesos-master.nix
deleted file mode 100644
index 572a9847e46c..000000000000
--- a/nixpkgs/nixos/modules/services/misc/mesos-master.nix
+++ /dev/null
@@ -1,125 +0,0 @@
-{ config, lib, pkgs, ... }:
-
-with lib;
-
-let
-  cfg = config.services.mesos.master;
-
-in {
-
-  options.services.mesos = {
-
-    master = {
-      enable = mkOption {
-        description = "Whether to enable the Mesos Master.";
-        default = false;
-        type = types.bool;
-      };
-
-      ip = mkOption {
-        description = "IP address to listen on.";
-        default = "0.0.0.0";
-        type = types.str;
-      };
-
-      port = mkOption {
-        description = "Mesos Master port";
-        default = 5050;
-        type = types.int;
-      };
-
-      advertiseIp = mkOption {
-        description = "IP address advertised to reach this master.";
-        default = null;
-        type = types.nullOr types.str;
-      };
-
-      advertisePort = mkOption {
-        description = "Port advertised to reach this Mesos master.";
-        default = null;
-        type = types.nullOr types.int;
-      };
-
-      zk = mkOption {
-        description = ''
-          ZooKeeper URL (used for leader election amongst masters).
-          May be one of:
-            zk://host1:port1,host2:port2,.../mesos
-            zk://username:password@host1:port1,host2:port2,.../mesos
-        '';
-        type = types.str;
-      };
-
-      workDir = mkOption {
-        description = "The Mesos work directory.";
-        default = "/var/lib/mesos/master";
-        type = types.str;
-      };
-
-      extraCmdLineOptions = mkOption {
-        description = ''
-          Extra command line options for Mesos Master.
-
-          See https://mesos.apache.org/documentation/latest/configuration/
-        '';
-        default = [ "" ];
-        type = types.listOf types.str;
-        example = [ "--credentials=VALUE" ];
-      };
-
-      quorum = mkOption {
-        description = ''
-          The size of the quorum of replicas when using 'replicated_log' based
-          registry. It is imperative to set this value to be a majority of
-          masters i.e., quorum > (number of masters)/2.
-
-          If 0 will fall back to --registry=in_memory.
-        '';
-        default = 0;
-        type = types.int;
-      };
-
-      logLevel = mkOption {
-        description = ''
-          The logging level used. Possible values:
-            'INFO', 'WARNING', 'ERROR'
-        '';
-        default = "INFO";
-        type = types.str;
-      };
-
-    };
-
-
-  };
-
-
-  config = mkIf cfg.enable {
-    systemd.tmpfiles.rules = [
-      "d '${cfg.workDir}' 0700 - - - -"
-    ];
-    systemd.services.mesos-master = {
-      description = "Mesos Master";
-      wantedBy = [ "multi-user.target" ];
-      after = [ "network.target" ];
-      serviceConfig = {
-        ExecStart = ''
-          ${pkgs.mesos}/bin/mesos-master \
-            --ip=${cfg.ip} \
-            --port=${toString cfg.port} \
-            ${optionalString (cfg.advertiseIp != null) "--advertise_ip=${cfg.advertiseIp}"} \
-            ${optionalString (cfg.advertisePort  != null) "--advertise_port=${toString cfg.advertisePort}"} \
-            ${if cfg.quorum == 0
-              then "--registry=in_memory"
-              else "--zk=${cfg.zk} --registry=replicated_log --quorum=${toString cfg.quorum}"} \
-            --work_dir=${cfg.workDir} \
-            --logging_level=${cfg.logLevel} \
-            ${toString cfg.extraCmdLineOptions}
-        '';
-        Restart = "on-failure";
-      };
-    };
-  };
-
-}
-
diff --git a/nixpkgs/nixos/modules/services/misc/mesos-slave.nix b/nixpkgs/nixos/modules/services/misc/mesos-slave.nix
deleted file mode 100644
index 170065d0065e..000000000000
--- a/nixpkgs/nixos/modules/services/misc/mesos-slave.nix
+++ /dev/null
@@ -1,220 +0,0 @@
-{ config, lib, pkgs, ... }:
-
-with lib;
-
-let
-  cfg = config.services.mesos.slave;
-
-  mkAttributes =
-    attrs: concatStringsSep ";" (mapAttrsToList
-                                   (k: v: "${k}:${v}")
-                                   (filterAttrs (k: v: v != null) attrs));
-  attribsArg = optionalString (cfg.attributes != {})
-                              "--attributes=${mkAttributes cfg.attributes}";
-
-  containerizersArg = concatStringsSep "," (
-    lib.unique (
-      cfg.containerizers ++ (optional cfg.withDocker "docker")
-    )
-  );
-
-  imageProvidersArg = concatStringsSep "," (
-    lib.unique (
-      cfg.imageProviders ++ (optional cfg.withDocker "docker")
-    )
-  );
-
-  isolationArg = concatStringsSep "," (
-    lib.unique (
-      cfg.isolation ++ (optionals cfg.withDocker [ "filesystem/linux" "docker/runtime"])
-    )
-  );
-
-in {
-
-  options.services.mesos = {
-    slave = {
-      enable = mkOption {
-        description = "Whether to enable the Mesos Slave.";
-        default = false;
-        type = types.bool;
-      };
-
-      ip = mkOption {
-        description = "IP address to listen on.";
-        default = "0.0.0.0";
-        type = types.str;
-      };
-
-      port = mkOption {
-        description = "Port to listen on.";
-        default = 5051;
-        type = types.int;
-      };
-
-      advertiseIp = mkOption {
-        description = "IP address advertised to reach this agent.";
-        default = null;
-        type = types.nullOr types.str;
-      };
-
-      advertisePort = mkOption {
-        description = "Port advertised to reach this agent.";
-        default = null;
-        type = types.nullOr types.int;
-      };
-
-      containerizers = mkOption {
-        description = ''
-          List of containerizer implementations to compose in order to provide
-          containerization. Available options are mesos and docker.
-          The order the containerizers are specified is the order they are tried.
-        '';
-        default = [ "mesos" ];
-        type = types.listOf types.str;
-      };
-
-      imageProviders = mkOption {
-        description = "List of supported image providers, e.g., APPC,DOCKER.";
-        default = [ ];
-        type = types.listOf types.str;
-      };
-
-      imageProvisionerBackend = mkOption {
-        description = ''
-          Strategy for provisioning container rootfs from images,
-          e.g., aufs, bind, copy, overlay.
-        '';
-        default = "copy";
-        type = types.str;
-      };
-
-      isolation = mkOption {
-        description = ''
-          Isolation mechanisms to use, e.g., posix/cpu,posix/mem, or
-          cgroups/cpu,cgroups/mem, or network/port_mapping, or `gpu/nvidia` for nvidia
-          specific gpu isolation.
-        '';
-        default = [ "posix/cpu" "posix/mem" ];
-        type = types.listOf types.str;
-      };
-
-      master = mkOption {
-        description = ''
-          May be one of:
-            zk://host1:port1,host2:port2,.../path
-            zk://username:password@host1:port1,host2:port2,.../path
-        '';
-        type = types.str;
-      };
-
-      withHadoop = mkOption {
-        description = "Add the HADOOP_HOME to the slave.";
-        default = false;
-        type = types.bool;
-      };
-
-      withDocker = mkOption {
-        description = "Enable the docker containerizer.";
-        default = config.virtualisation.docker.enable;
-        type = types.bool;
-      };
-
-      dockerRegistry = mkOption {
-        description = ''
-          The default url for pulling Docker images.
-          It could either be a Docker registry server url,
-          or a local path in which Docker image archives are stored.
-        '';
-        default = null;
-        type = types.nullOr (types.either types.str types.path);
-      };
-
-      workDir = mkOption {
-        description = "The Mesos work directory.";
-        default = "/var/lib/mesos/slave";
-        type = types.str;
-      };
-
-      extraCmdLineOptions = mkOption {
-        description = ''
-          Extra command line options for Mesos Slave.
-
-          See https://mesos.apache.org/documentation/latest/configuration/
-        '';
-        default = [ "" ];
-        type = types.listOf types.str;
-        example = [ "--gc_delay=3days" ];
-      };
-
-      logLevel = mkOption {
-        description = ''
-          The logging level used. Possible values:
-            'INFO', 'WARNING', 'ERROR'
-        '';
-        default = "INFO";
-        type = types.str;
-      };
-
-      attributes = mkOption {
-        description = ''
-          Machine attributes for the slave instance.
-
-          Use caution when changing this; you may need to manually reset slave
-          metadata before the slave can re-register.
-        '';
-        default = {};
-        type = types.attrsOf types.str;
-        example = { rack = "aa";
-                    host = "aabc123";
-                    os = "nixos"; };
-      };
-
-      executorEnvironmentVariables = mkOption {
-        description = ''
-          The environment variables that should be passed to the executor, and thus subsequently task(s).
-        '';
-        default = {
-          PATH = "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin";
-        };
-        type = types.attrsOf types.str;
-      };
-    };
-
-  };
-
-  config = mkIf cfg.enable {
-    systemd.tmpfiles.rules = [
-      "d '${cfg.workDir}' 0701 - - - -"
-    ];
-    systemd.services.mesos-slave = {
-      description = "Mesos Slave";
-      wantedBy = [ "multi-user.target" ];
-      after = [ "network.target" ] ++ optionals cfg.withDocker [ "docker.service" ] ;
-      path = [ pkgs.runtimeShellPackage ];
-      serviceConfig = {
-        ExecStart = ''
-          ${pkgs.mesos}/bin/mesos-slave \
-            --containerizers=${containerizersArg} \
-            --image_providers=${imageProvidersArg} \
-            --image_provisioner_backend=${cfg.imageProvisionerBackend} \
-            --isolation=${isolationArg} \
-            --ip=${cfg.ip} \
-            --port=${toString cfg.port} \
-            ${optionalString (cfg.advertiseIp != null) "--advertise_ip=${cfg.advertiseIp}"} \
-            ${optionalString (cfg.advertisePort  != null) "--advertise_port=${toString cfg.advertisePort}"} \
-            --master=${cfg.master} \
-            --work_dir=${cfg.workDir} \
-            --logging_level=${cfg.logLevel} \
-            ${attribsArg} \
-            ${optionalString cfg.withHadoop "--hadoop-home=${pkgs.hadoop}"} \
-            ${optionalString cfg.withDocker "--docker=${pkgs.docker}/libexec/docker/docker"} \
-            ${optionalString (cfg.dockerRegistry != null) "--docker_registry=${cfg.dockerRegistry}"} \
-            --executor_environment_variables=${lib.escapeShellArg (builtins.toJSON cfg.executorEnvironmentVariables)} \
-            ${toString cfg.extraCmdLineOptions}
-        '';
-      };
-    };
-  };
-
-}
diff --git a/nixpkgs/nixos/modules/services/misc/nix-daemon.nix b/nixpkgs/nixos/modules/services/misc/nix-daemon.nix
index 5727e8e95730..2680b1cc0d3b 100644
--- a/nixpkgs/nixos/modules/services/misc/nix-daemon.nix
+++ b/nixpkgs/nixos/modules/services/misc/nix-daemon.nix
@@ -193,50 +193,111 @@ in
       };
 
       buildMachines = mkOption {
-        type = types.listOf types.attrs;
+        type = types.listOf (types.submodule ({
+          options = {
+            hostName = mkOption {
+              type = types.str;
+              example = "nixbuilder.example.org";
+              description = ''
+                The hostname of the build machine.
+              '';
+            };
+            system = mkOption {
+              type = types.nullOr types.str;
+              default = null;
+              example = "x86_64-linux";
+              description = ''
+                The system type the build machine can execute derivations on.
+                Either this attribute or <varname>systems</varname> must be
+                present, where <varname>system</varname> takes precedence if
+                both are set.
+              '';
+            };
+            systems = mkOption {
+              type = types.listOf types.str;
+              default = [];
+              example = [ "x86_64-linux" "aarch64-linux" ];
+              description = ''
+                The system types the build machine can execute derivations on.
+                Either this attribute or <varname>system</varname> must be
+                present, where <varname>system</varname> takes precedence if
+                both are set.
+              '';
+            };
+            sshUser = mkOption {
+              type = types.nullOr types.str;
+              default = null;
+              example = "builder";
+              description = ''
+                The username to log in as on the remote host. This user must be
+                able to log in and run nix commands non-interactively. It must
+                also be privileged to build derivations, so must be included in
+                <option>nix.trustedUsers</option>.
+              '';
+            };
+            sshKey = mkOption {
+              type = types.nullOr types.str;
+              default = null;
+              example = "/root/.ssh/id_buildhost_builduser";
+              description = ''
+                The path to the SSH private key with which to authenticate on
+                the build machine. The private key must not have a passphrase.
+                If null, the building user (root on NixOS machines) must have an
+                appropriate ssh configuration to log in non-interactively.
+
+                Note that for security reasons, this path must point to a file
+                in the local filesystem, *not* to the nix store.
+              '';
+            };
+            maxJobs = mkOption {
+              type = types.int;
+              default = 1;
+              description = ''
+                The number of concurrent jobs the build machine supports. The
+                build machine will enforce its own limits, but this allows hydra
+                to schedule better since there is no work-stealing between build
+                machines.
+              '';
+            };
+            speedFactor = mkOption {
+              type = types.int;
+              default = 1;
+              description = ''
+                The relative speed of this builder. This is an arbitrary integer
+                that indicates the speed of this builder, relative to other
+                builders. Higher is faster.
+              '';
+            };
+            mandatoryFeatures = mkOption {
+              type = types.listOf types.str;
+              default = [];
+              example = [ "big-parallel" ];
+              description = ''
+                A list of features mandatory for this builder. The builder will
+                be ignored for derivations that don't require all features in
+                this list. All mandatory features are automatically included in
+                <varname>supportedFeatures</varname>.
+              '';
+            };
+            supportedFeatures = mkOption {
+              type = types.listOf types.str;
+              default = [];
+              example = [ "kvm" "big-parallel" ];
+              description = ''
+                A list of features supported by this builder. The builder will
+                be ignored for derivations that require features not in this
+                list.
+              '';
+            };
+          };
+        }));
         default = [];
-        example = literalExample ''
-          [ { hostName = "voila.labs.cs.uu.nl";
-              sshUser = "nix";
-              sshKey = "/root/.ssh/id_buildfarm";
-              system = "powerpc-darwin";
-              maxJobs = 1;
-            }
-            { hostName = "linux64.example.org";
-              sshUser = "buildfarm";
-              sshKey = "/root/.ssh/id_buildfarm";
-              system = "x86_64-linux";
-              maxJobs = 2;
-              speedFactor = 2;
-              supportedFeatures = [ "kvm" ];
-              mandatoryFeatures = [ "perf" ];
-            }
-          ]
-        '';
         description = ''
-          This option lists the machines to be used if distributed
-          builds are enabled (see
-          <option>nix.distributedBuilds</option>).  Nix will perform
-          derivations on those machines via SSH by copying the inputs
-          to the Nix store on the remote machine, starting the build,
-          then copying the output back to the local Nix store.  Each
-          element of the list should be an attribute set containing
-          the machine's host name (<varname>hostname</varname>), the
-          user name to be used for the SSH connection
-          (<varname>sshUser</varname>), the Nix system type
-          (<varname>system</varname>, e.g.,
-          <literal>"i686-linux"</literal>), the maximum number of
-          jobs to be run in parallel on that machine
-          (<varname>maxJobs</varname>), the path to the SSH private
-          key to be used to connect (<varname>sshKey</varname>), a
-          list of supported features of the machine
-          (<varname>supportedFeatures</varname>) and a list of
-          mandatory features of the machine
-          (<varname>mandatoryFeatures</varname>). The SSH private key
-          should not have a passphrase, and the corresponding public
-          key should be added to
-          <filename>~<replaceable>sshUser</replaceable>/authorized_keys</filename>
-          on the remote machine.
+          This option lists the machines to be used if distributed builds are
+          enabled (see <option>nix.distributedBuilds</option>).
+          Nix will perform derivations on those machines via SSH by copying the
+          inputs to the Nix store on the remote machine, starting the build,
+          then copying the output back to the local Nix store.
         '';
       };
 
@@ -461,14 +522,14 @@ in
       { enable = cfg.buildMachines != [];
         text =
           concatMapStrings (machine:
-            "${if machine ? sshUser then "${machine.sshUser}@" else ""}${machine.hostName} "
-            + machine.system or (concatStringsSep "," machine.systems)
-            + " ${machine.sshKey or "-"} ${toString machine.maxJobs or 1} "
-            + toString (machine.speedFactor or 1)
+            "${if machine.sshUser != null then "${machine.sshUser}@" else ""}${machine.hostName} "
+            + (if machine.system != null then machine.system else concatStringsSep "," machine.systems)
+            + " ${if machine.sshKey != null then machine.sshKey else "-"} ${toString machine.maxJobs} "
+            + toString (machine.speedFactor)
             + " "
-            + concatStringsSep "," (machine.mandatoryFeatures or [] ++ machine.supportedFeatures or [])
+            + concatStringsSep "," (machine.mandatoryFeatures ++ machine.supportedFeatures)
             + " "
-            + concatStringsSep "," machine.mandatoryFeatures or []
+            + concatStringsSep "," machine.mandatoryFeatures
             + "\n"
           ) cfg.buildMachines;
       };
@@ -526,9 +587,10 @@ in
 
     nix.systemFeatures = mkDefault (
       [ "nixos-test" "benchmark" "big-parallel" "kvm" ] ++
-      optionals (pkgs.stdenv.isx86_64 && pkgs.hostPlatform.platform ? gcc.arch) (
-        # a x86_64 builder can run code for `platform.gcc.arch` and inferior architectures:
-        [ "gccarch-${pkgs.hostPlatform.platform.gcc.arch}" ] ++ map (x: "gccarch-${x}") lib.systems.architectures.inferiors.${pkgs.hostPlatform.platform.gcc.arch}
+      optionals (pkgs.hostPlatform.platform ? gcc.arch) (
+        # a builder can run code for `platform.gcc.arch` and inferior architectures
+        [ "gccarch-${pkgs.hostPlatform.platform.gcc.arch}" ] ++
+        map (x: "gccarch-${x}") lib.systems.architectures.inferiors.${pkgs.hostPlatform.platform.gcc.arch}
       )
     );
 
diff --git a/nixpkgs/nixos/modules/services/misc/octoprint.nix b/nixpkgs/nixos/modules/services/misc/octoprint.nix
index 7a71d2c8c6aa..e2fbd3b401cc 100644
--- a/nixpkgs/nixos/modules/services/misc/octoprint.nix
+++ b/nixpkgs/nixos/modules/services/misc/octoprint.nix
@@ -68,8 +68,8 @@ in
       plugins = mkOption {
         default = plugins: [];
         defaultText = "plugins: []";
-        example = literalExample "plugins: [ m3d-fio ]";
-        description = "Additional plugins.";
+        example = literalExample "plugins: with plugins; [ m33-fio stlviewer ]";
+        description = "Additional plugins to be used. Available plugins are passed through the plugins input.";
       };
 
       extraConfig = mkOption {
diff --git a/nixpkgs/nixos/modules/services/misc/pinnwand.nix b/nixpkgs/nixos/modules/services/misc/pinnwand.nix
new file mode 100644
index 000000000000..aa1ee5cfaa77
--- /dev/null
+++ b/nixpkgs/nixos/modules/services/misc/pinnwand.nix
@@ -0,0 +1,78 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.services.pinnwand;
+
+  format = pkgs.formats.toml {};
+  configFile = format.generate "pinnwand.toml" cfg.settings;
+in
+{
+  options.services.pinnwand = {
+    enable = mkEnableOption "Pinnwand";
+
+    port = mkOption {
+      type = types.port;
+      description = "The port to listen on.";
+      default = 8000;
+    };
+
+    settings = mkOption {
+      type = format.type;
+      description = ''
+        Your <filename>pinnwand.toml</filename> as a Nix attribute set. Look up
+        possible options in the <link xlink:href="https://github.com/supakeen/pinnwand/blob/master/pinnwand.toml-example">pinnwand.toml-example</link>.
+      '';
+      default = {
+        # https://github.com/supakeen/pinnwand/blob/master/pinnwand.toml-example
+        database_uri = "sqlite:///var/lib/pinnwand/pinnwand.db";
+        preferred_lexeres = [];
+        paste_size = 262144;
+        paste_help = ''
+          <p>Welcome to pinnwand, this site is a pastebin. It allows you to share code with others. If you write code in the text area below and press the paste button you will be given a link you can share with others so they can view your code as well.</p><p>People with the link can view your pasted code, only you can remove your paste and it expires automatically. Note that anyone could guess the URI to your paste so don't rely on it being private.</p>
+        '';
+        footer = ''
+          View <a href="//github.com/supakeen/pinnwand" target="_BLANK">source code</a>, the <a href="/removal">removal</a> or <a href="/expiry">expiry</a> stories, or read the <a href="/about">about</a> page.
+        '';
+      };
+    };
+  };
+
+  config = mkIf cfg.enable {
+    systemd.services.pinnwand = {
+      description = "Pinnwannd HTTP Server";
+      after = [ "network.target" ];
+      wantedBy = [ "multi-user.target" ];
+
+      unitConfig.Documentation = "https://pinnwand.readthedocs.io/en/latest/";
+      serviceConfig = {
+        ExecStart = "${pkgs.pinnwand}/bin/pinnwand --configuration-path ${configFile} http --port ${toString(cfg.port)}";
+        StateDirectory = "pinnwand";
+        StateDirectoryMode = "0700";
+
+        AmbientCapabilities = [];
+        CapabilityBoundingSet = "";
+        DevicePolicy = "closed";
+        DynamicUser = true;
+        LockPersonality = true;
+        MemoryDenyWriteExecute = true;
+        PrivateDevices = true;
+        PrivateUsers = true;
+        ProtectClock = true;
+        ProtectControlGroups = true;
+        ProtectKernelLogs = true;
+        ProtectHome = true;
+        ProtectHostname = true;
+        ProtectKernelModules = true;
+        ProtectKernelTunables = true;
+        RestrictAddressFamilies = [ "AF_UNIX" "AF_INET" "AF_INET6" ];
+        RestrictNamespaces = true;
+        RestrictRealtime = true;
+        SystemCallArchitectures = "native";
+        SystemCallFilter = "@system-service";
+        UMask = "0077";
+      };
+    };
+  };
+}
diff --git a/nixpkgs/nixos/modules/services/misc/redmine.nix b/nixpkgs/nixos/modules/services/misc/redmine.nix
index 0e71cf925692..1313bdaccc49 100644
--- a/nixpkgs/nixos/modules/services/misc/redmine.nix
+++ b/nixpkgs/nixos/modules/services/misc/redmine.nix
@@ -1,12 +1,12 @@
 { config, lib, pkgs, ... }:
 
 let
-  inherit (lib) mkDefault mkEnableOption mkIf mkOption types;
+  inherit (lib) mkBefore mkDefault mkEnableOption mkIf mkOption mkRemovedOptionModule types;
   inherit (lib) concatStringsSep literalExample mapAttrsToList;
-  inherit (lib) optional optionalAttrs optionalString singleton versionAtLeast;
+  inherit (lib) optional optionalAttrs optionalString;
 
   cfg = config.services.redmine;
-
+  format = pkgs.formats.yaml {};
   bundle = "${cfg.package}/share/redmine/bin/bundle";
 
   databaseYml = pkgs.writeText "database.yml" ''
@@ -20,24 +20,8 @@ let
       ${optionalString (cfg.database.type == "mysql2" && cfg.database.socket != null) "socket: ${cfg.database.socket}"}
   '';
 
-  configurationYml = pkgs.writeText "configuration.yml" ''
-    default:
-      scm_subversion_command: ${pkgs.subversion}/bin/svn
-      scm_mercurial_command: ${pkgs.mercurial}/bin/hg
-      scm_git_command: ${pkgs.gitAndTools.git}/bin/git
-      scm_cvs_command: ${pkgs.cvs}/bin/cvs
-      scm_bazaar_command: ${pkgs.breezy}/bin/bzr
-      scm_darcs_command: ${pkgs.darcs}/bin/darcs
-
-    ${cfg.extraConfig}
-  '';
-
-  additionalEnvironment = pkgs.writeText "additional_environment.rb" ''
-    config.logger = Logger.new("${cfg.stateDir}/log/production.log", 14, 1048576)
-    config.logger.level = Logger::INFO
-
-    ${cfg.extraEnv}
-  '';
+  configurationYml = format.generate "configuration.yml" cfg.settings;
+  additionalEnvironment = pkgs.writeText "additional_environment.rb" cfg.extraEnv;
 
   unpackTheme = unpack "theme";
   unpackPlugin = unpack "plugin";
@@ -56,8 +40,13 @@ let
   pgsqlLocal = cfg.database.createLocally && cfg.database.type == "postgresql";
 
 in
-
 {
+  imports = [
+    (mkRemovedOptionModule [ "services" "redmine" "extraConfig" ] "Use services.redmine.settings instead.")
+    (mkRemovedOptionModule [ "services" "redmine" "database" "password" ] "Use services.redmine.database.passwordFile instead.")
+  ];
+
+  # interface
   options = {
     services.redmine = {
       enable = mkEnableOption "Redmine";
@@ -93,21 +82,24 @@ in
         description = "The state directory, logs and plugins are stored here.";
       };
 
-      extraConfig = mkOption {
-        type = types.lines;
-        default = "";
+      settings = mkOption {
+        type = format.type;
+        default = {};
         description = ''
-          Extra configuration in configuration.yml.
-
-          See <link xlink:href="https://guides.rubyonrails.org/action_mailer_basics.html#action-mailer-configuration"/>
+          Redmine configuration (<filename>configuration.yml</filename>). Refer to
+          <link xlink:href="https://guides.rubyonrails.org/action_mailer_basics.html#action-mailer-configuration"/>
           for details.
         '';
         example = literalExample ''
-          email_delivery:
-            delivery_method: smtp
-            smtp_settings:
-              address: mail.example.com
-              port: 25
+          {
+            email_delivery = {
+              delivery_method = "smtp";
+              smtp_settings = {
+                address = "mail.example.com";
+                port = 25;
+              };
+            };
+          }
         '';
       };
 
@@ -186,16 +178,6 @@ in
           description = "Database user.";
         };
 
-        password = mkOption {
-          type = types.str;
-          default = "";
-          description = ''
-            The password corresponding to <option>database.user</option>.
-            Warning: this is stored in cleartext in the Nix store!
-            Use <option>database.passwordFile</option> instead.
-          '';
-        };
-
         passwordFile = mkOption {
           type = types.nullOr types.path;
           default = null;
@@ -226,11 +208,12 @@ in
     };
   };
 
+  # implementation
   config = mkIf cfg.enable {
 
     assertions = [
-      { assertion = cfg.database.passwordFile != null || cfg.database.password != "" || cfg.database.socket != null;
-        message = "one of services.redmine.database.socket, services.redmine.database.passwordFile, or services.redmine.database.password must be set";
+      { assertion = cfg.database.passwordFile != null || cfg.database.socket != null;
+        message = "one of services.redmine.database.socket or services.redmine.database.passwordFile must be set";
       }
       { assertion = cfg.database.createLocally -> cfg.database.user == cfg.user;
         message = "services.redmine.database.user must be set to ${cfg.user} if services.redmine.database.createLocally is set true";
@@ -243,6 +226,22 @@ in
       }
     ];
 
+    services.redmine.settings = {
+      production = {
+        scm_subversion_command = "${pkgs.subversion}/bin/svn";
+        scm_mercurial_command = "${pkgs.mercurial}/bin/hg";
+        scm_git_command = "${pkgs.gitAndTools.git}/bin/git";
+        scm_cvs_command = "${pkgs.cvs}/bin/cvs";
+        scm_bazaar_command = "${pkgs.breezy}/bin/bzr";
+        scm_darcs_command = "${pkgs.darcs}/bin/darcs";
+      };
+    };
+
+    services.redmine.extraEnv = mkBefore ''
+      config.logger = Logger.new("${cfg.stateDir}/log/production.log", 14, 1048576)
+      config.logger.level = Logger::INFO
+    '';
+
     services.mysql = mkIf mysqlLocal {
       enable = true;
       package = mkDefault pkgs.mariadb;
@@ -338,7 +337,7 @@ in
 
 
         # handle database.passwordFile & permissions
-        DBPASS=$(head -n1 ${cfg.database.passwordFile})
+        DBPASS=${optionalString (cfg.database.passwordFile != null) "$(head -n1 ${cfg.database.passwordFile})"}
         cp -f ${databaseYml} "${cfg.stateDir}/config/database.yml"
         sed -e "s,#dbpass#,$DBPASS,g" -i "${cfg.stateDir}/config/database.yml"
         chmod 440 "${cfg.stateDir}/config/database.yml"
@@ -379,17 +378,6 @@ in
       redmine.gid = config.ids.gids.redmine;
     };
 
-    warnings = optional (cfg.database.password != "")
-      ''config.services.redmine.database.password will be stored as plaintext
-      in the Nix store. Use database.passwordFile instead.'';
-
-    # Create database passwordFile default when password is configured.
-    services.redmine.database.passwordFile =
-      (mkDefault (toString (pkgs.writeTextFile {
-        name = "redmine-database-password";
-        text = cfg.database.password;
-      })));
-
   };
 
 }
diff --git a/nixpkgs/nixos/modules/services/misc/siproxd.nix b/nixpkgs/nixos/modules/services/misc/siproxd.nix
index ae7b27de8e70..0e87fc461d3f 100644
--- a/nixpkgs/nixos/modules/services/misc/siproxd.nix
+++ b/nixpkgs/nixos/modules/services/misc/siproxd.nix
@@ -38,7 +38,7 @@ in
         type = types.bool;
         default = false;
         description = ''
-          Whether to enable the Siproxd SIP 
+          Whether to enable the Siproxd SIP
 	  proxy/masquerading daemon.
         '';
       };
@@ -111,7 +111,7 @@ in
         type = types.int;
         default = 300;
         description = ''
-          Timeout for an RTP stream. If for the specified 
+          Timeout for an RTP stream. If for the specified
           number of seconds no data is relayed on an active
           stream, it is considered dead and will be killed.
         '';
@@ -122,7 +122,7 @@ in
         default = 46;
         description = ''
           DSCP (differentiated services) value to be assigned
-          to RTP packets. Allows QOS aware routers to handle 
+          to RTP packets. Allows QOS aware routers to handle
           different types traffic with different priorities.
         '';
       };
@@ -132,7 +132,7 @@ in
         default = 0;
         description = ''
           DSCP (differentiated services) value to be assigned
-          to SIP packets. Allows QOS aware routers to handle 
+          to SIP packets. Allows QOS aware routers to handle
           different types traffic with different priorities.
         '';
       };
diff --git a/nixpkgs/nixos/modules/services/misc/ssm-agent.nix b/nixpkgs/nixos/modules/services/misc/ssm-agent.nix
index f7c05deeecb5..00e806695fd5 100644
--- a/nixpkgs/nixos/modules/services/misc/ssm-agent.nix
+++ b/nixpkgs/nixos/modules/services/misc/ssm-agent.nix
@@ -29,13 +29,15 @@ in {
 
   config = mkIf cfg.enable {
     systemd.services.ssm-agent = {
+      users.extraUsers.ssm-user = {};
+
       inherit (cfg.package.meta) description;
       after    = [ "network.target" ];
       wantedBy = [ "multi-user.target" ];
 
-      path = [ fake-lsb-release ];
+      path = [ fake-lsb-release pkgs.coreutils ];
       serviceConfig = {
-        ExecStart = "${cfg.package}/bin/agent";
+        ExecStart = "${cfg.package}/bin/amazon-ssm-agent";
         KillMode = "process";
         Restart = "on-failure";
         RestartSec = "15min";
diff --git a/nixpkgs/nixos/modules/services/misc/sssd.nix b/nixpkgs/nixos/modules/services/misc/sssd.nix
index 3da99a3b38c1..386281e2b7cc 100644
--- a/nixpkgs/nixos/modules/services/misc/sssd.nix
+++ b/nixpkgs/nixos/modules/services/misc/sssd.nix
@@ -69,7 +69,7 @@ in {
         mode = "0400";
       };
 
-      system.nssModules = pkgs.sssd;
+      system.nssModules = [ pkgs.sssd ];
       system.nssDatabases = {
         group = [ "sss" ];
         passwd = [ "sss" ];
@@ -92,4 +92,6 @@ in {
     services.openssh.authorizedKeysCommand = "/etc/ssh/authorized_keys_command";
     services.openssh.authorizedKeysCommandUser = "nobody";
   })];
+
+  meta.maintainers = with maintainers; [ bbigras ];
 }
diff --git a/nixpkgs/nixos/modules/services/misc/tzupdate.nix b/nixpkgs/nixos/modules/services/misc/tzupdate.nix
index 570982ced29a..eac1e1112a5a 100644
--- a/nixpkgs/nixos/modules/services/misc/tzupdate.nix
+++ b/nixpkgs/nixos/modules/services/misc/tzupdate.nix
@@ -11,7 +11,7 @@ in {
       default = false;
       description = ''
         Enable the tzupdate timezone updating service. This provides
-        a one-shot service which can be activated with systemctl to 
+        a one-shot service which can be activated with systemctl to
         update the timezone.
       '';
     };
@@ -21,7 +21,7 @@ in {
     # We need to have imperative time zone management for this to work.
     # This will give users an error if they have set an explicit time
     # zone, which is better than silently overriding it.
-    time.timeZone = null; 
+    time.timeZone = null;
 
     # We provide a one-shot service which can be manually run. We could
     # provide a service that runs on startup, but it's tricky to get
diff --git a/nixpkgs/nixos/modules/services/misc/zigbee2mqtt.nix b/nixpkgs/nixos/modules/services/misc/zigbee2mqtt.nix
new file mode 100644
index 000000000000..0957920f1a09
--- /dev/null
+++ b/nixpkgs/nixos/modules/services/misc/zigbee2mqtt.nix
@@ -0,0 +1,98 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.services.zigbee2mqtt;
+
+  configJSON = pkgs.writeText "configuration.json"
+    (builtins.toJSON (recursiveUpdate defaultConfig cfg.config));
+  configFile = pkgs.runCommand "configuration.yaml" { preferLocalBuild = true; } ''
+    ${pkgs.remarshal}/bin/json2yaml -i ${configJSON} -o $out
+  '';
+
+  # the default config contains all required settings,
+  # so the service starts up without crashing.
+  defaultConfig = {
+    homeassistant = false;
+    permit_join = false;
+    mqtt = {
+      base_topic = "zigbee2mqtt";
+      server = "mqtt://localhost:1883";
+    };
+    serial.port = "/dev/ttyACM0";
+    # put device configuration into separate file because configuration.yaml
+    # is copied from the store on startup
+    devices = "devices.yaml";
+  };
+in
+{
+  meta.maintainers = with maintainers; [ sweber ];
+
+  options.services.zigbee2mqtt = {
+    enable = mkEnableOption "enable zigbee2mqtt service";
+
+    package = mkOption {
+      description = "Zigbee2mqtt package to use";
+      default = pkgs.zigbee2mqtt.override {
+        dataDir = cfg.dataDir;
+      };
+      defaultText = "pkgs.zigbee2mqtt";
+      type = types.package;
+    };
+
+    dataDir = mkOption {
+      description = "Zigbee2mqtt data directory";
+      default = "/var/lib/zigbee2mqtt";
+      type = types.path;
+    };
+
+    config = mkOption {
+      default = {};
+      type = with types; nullOr attrs;
+      example = literalExample ''
+        {
+          homeassistant = config.services.home-assistant.enable;
+          permit_join = true;
+          serial = {
+            port = "/dev/ttyACM1";
+          };
+        }
+      '';
+      description = ''
+        Your <filename>configuration.yaml</filename> as a Nix attribute set.
+      '';
+    };
+  };
+
+  config = mkIf (cfg.enable) {
+    systemd.services.zigbee2mqtt = {
+      description = "Zigbee2mqtt Service";
+      wantedBy = [ "multi-user.target" ];
+      after = [ "network.target" ];
+      serviceConfig = {
+        ExecStart = "${cfg.package}/bin/zigbee2mqtt";
+        User = "zigbee2mqtt";
+        WorkingDirectory = cfg.dataDir;
+        Restart = "on-failure";
+        ProtectSystem = "strict";
+        ReadWritePaths = cfg.dataDir;
+        PrivateTmp = true;
+        RemoveIPC = true;
+      };
+      preStart = ''
+        cp --no-preserve=mode ${configFile} "${cfg.dataDir}/configuration.yaml"
+      '';
+    };
+
+    users.users.zigbee2mqtt = {
+      home = cfg.dataDir;
+      createHome = true;
+      group = "zigbee2mqtt";
+      extraGroups = [ "dialout" ];
+      uid = config.ids.uids.zigbee2mqtt;
+    };
+
+    users.groups.zigbee2mqtt.gid = config.ids.gids.zigbee2mqtt;
+  };
+}
diff --git a/nixpkgs/nixos/modules/services/monitoring/cadvisor.nix b/nixpkgs/nixos/modules/services/monitoring/cadvisor.nix
index 655a6934a266..da051dbe4655 100644
--- a/nixpkgs/nixos/modules/services/monitoring/cadvisor.nix
+++ b/nixpkgs/nixos/modules/services/monitoring/cadvisor.nix
@@ -90,7 +90,7 @@ in {
         default = [];
         description = ''
           Additional cadvisor options.
-          
+
           See <link xlink:href='https://github.com/google/cadvisor/blob/master/docs/runtime_options.md'/> for available options.
         '';
       };
diff --git a/nixpkgs/nixos/modules/services/monitoring/datadog-agent.nix b/nixpkgs/nixos/modules/services/monitoring/datadog-agent.nix
index f1cb890794e1..d97565f15d6c 100644
--- a/nixpkgs/nixos/modules/services/monitoring/datadog-agent.nix
+++ b/nixpkgs/nixos/modules/services/monitoring/datadog-agent.nix
@@ -6,7 +6,6 @@ let
   cfg = config.services.datadog-agent;
 
   ddConf = {
-    dd_url              = "https://app.datadoghq.com";
     skip_ssl_validation = false;
     confd_path          = "/etc/datadog-agent/conf.d";
     additional_checksd  = "/etc/datadog-agent/checks.d";
@@ -14,6 +13,8 @@ let
   }
   // optionalAttrs (cfg.logLevel != null) { log_level = cfg.logLevel; }
   // optionalAttrs (cfg.hostname != null) { inherit (cfg) hostname; }
+  // optionalAttrs (cfg.ddUrl != null) { dd_url = cfg.ddUrl; }
+  // optionalAttrs (cfg.site != null) { site = cfg.site; }
   // optionalAttrs (cfg.tags != null ) { tags = concatStringsSep ", " cfg.tags; }
   // optionalAttrs (cfg.enableLiveProcessCollection) { process_config = { enabled = "true"; }; }
   // optionalAttrs (cfg.enableTraceAgent) { apm_config = { enabled = true; }; }
@@ -77,6 +78,27 @@ in {
       type = types.path;
     };
 
+    ddUrl = mkOption {
+      description = ''
+        Custom dd_url to configure the agent with. Useful if traffic to datadog
+        needs to go through a proxy.
+        Don't use this to point to another datadog site (EU) - use site instead.
+      '';
+      default = null;
+      example = "http://haproxy.example.com:3834";
+      type = types.nullOr types.str;
+    };
+
+    site = mkOption {
+      description = ''
+        The datadog site to point the agent towards.
+        Set to datadoghq.eu to point it to their EU site.
+      '';
+      default = null;
+      example = "datadoghq.eu";
+      type = types.nullOr types.str;
+    };
+
     tags = mkOption {
       description = "The tags to mark this Datadog agent";
       example = [ "test" "service" ];
diff --git a/nixpkgs/nixos/modules/services/monitoring/dd-agent/dd-agent.nix b/nixpkgs/nixos/modules/services/monitoring/dd-agent/dd-agent.nix
index e91717fb2054..a290dae8d4b9 100644
--- a/nixpkgs/nixos/modules/services/monitoring/dd-agent/dd-agent.nix
+++ b/nixpkgs/nixos/modules/services/monitoring/dd-agent/dd-agent.nix
@@ -97,11 +97,11 @@ let
         "dd-agent/conf.d/nginx.yaml".source = nginxConfig;
       }) //
       (optionalAttrs (cfg.mongoConfig != null)
-      { 
+      {
         "dd-agent/conf.d/mongo.yaml".source = mongoConfig;
       }) //
       (optionalAttrs (cfg.processConfig != null)
-      { 
+      {
         "dd-agent/conf.d/process.yaml".source = processConfig;
       }) //
       (optionalAttrs (cfg.jmxConfig != null)
diff --git a/nixpkgs/nixos/modules/services/monitoring/do-agent.nix b/nixpkgs/nixos/modules/services/monitoring/do-agent.nix
index 2d3fe2f79768..4dfb6236727b 100644
--- a/nixpkgs/nixos/modules/services/monitoring/do-agent.nix
+++ b/nixpkgs/nixos/modules/services/monitoring/do-agent.nix
@@ -4,6 +4,7 @@ with lib;
 
 let
   cfg = config.services.do-agent;
+
 in
 {
   options.services.do-agent = {
@@ -11,23 +12,13 @@ in
   };
 
   config = mkIf cfg.enable {
-    environment.systemPackages = [ pkgs.do-agent ];
+    systemd.packages = [ pkgs.do-agent ];
 
     systemd.services.do-agent = {
-      description = "DigitalOcean Droplet Metrics Agent";
       wantedBy = [ "multi-user.target" ];
-      after = [ "network-online.target" ];
-      wants = [ "network-online.target" ];
       serviceConfig = {
-        ExecStart = "${pkgs.do-agent}/bin/do-agent --syslog";
-        Restart = "always";
-        OOMScoreAdjust = -900;
-        SyslogIdentifier = "DigitalOceanAgent";
-        PrivateTmp = "yes";
-        ProtectSystem = "full";
-        ProtectHome = "yes";
-        NoNewPrivileges = "yes";
-        DynamicUser = "yes";
+        ExecStart = [ "" "${pkgs.do-agent}/bin/do-agent --syslog" ];
+        DynamicUser = true;
       };
     };
   };
diff --git a/nixpkgs/nixos/modules/services/monitoring/monit.nix b/nixpkgs/nixos/modules/services/monitoring/monit.nix
index ca9352272174..379ee967620e 100644
--- a/nixpkgs/nixos/modules/services/monitoring/monit.nix
+++ b/nixpkgs/nixos/modules/services/monitoring/monit.nix
@@ -43,4 +43,6 @@ in
     };
 
   };
+
+  meta.maintainers = with maintainers; [ ryantm ];
 }
diff --git a/nixpkgs/nixos/modules/services/monitoring/netdata.nix b/nixpkgs/nixos/modules/services/monitoring/netdata.nix
index a5233a46e341..2e73e15d3a86 100644
--- a/nixpkgs/nixos/modules/services/monitoring/netdata.nix
+++ b/nixpkgs/nixos/modules/services/monitoring/netdata.nix
@@ -133,16 +133,6 @@ in {
         }
       ];
 
-    systemd.tmpfiles.rules = [
-      "d /var/cache/netdata 0755 ${cfg.user} ${cfg.group} -"
-      "Z /var/cache/netdata - ${cfg.user} ${cfg.group} -"
-      "d /var/log/netdata 0755 ${cfg.user} ${cfg.group} -"
-      "Z /var/log/netdata - ${cfg.user} ${cfg.group} -"
-      "d /var/lib/netdata 0755 ${cfg.user} ${cfg.group} -"
-      "Z /var/lib/netdata - ${cfg.user} ${cfg.group} -"
-      "d /etc/netdata 0755 ${cfg.user} ${cfg.group} -"
-      "Z /etc/netdata - ${cfg.user} ${cfg.group} -"
-    ];
     systemd.services.netdata = {
       description = "Real time performance monitoring";
       after = [ "network.target" ];
@@ -158,11 +148,40 @@ in {
         # User and group
         User = cfg.user;
         Group = cfg.group;
-        # Runtime directory and mode
-        RuntimeDirectory = "netdata";
-        RuntimeDirectoryMode = "0755";
         # Performance
         LimitNOFILE = "30000";
+        # Runtime directory and mode
+        RuntimeDirectory = "netdata";
+        RuntimeDirectoryMode = "0750";
+        # State directory and mode
+        StateDirectory = "netdata";
+        StateDirectoryMode = "0750";
+        # Cache directory and mode
+        CacheDirectory = "netdata";
+        CacheDirectoryMode = "0750";
+        # Logs directory and mode
+        LogsDirectory = "netdata";
+        LogsDirectoryMode = "0750";
+        # Configuration directory and mode
+        ConfigurationDirectory = "netdata";
+        ConfigurationDirectoryMode = "0755";
+        # Capabilities
+        CapabilityBoundingSet = [
+          "CAP_DAC_OVERRIDE"      # is required for freeipmi and slabinfo plugins
+          "CAP_DAC_READ_SEARCH"   # is required for apps plugin
+          "CAP_FOWNER"            # is required for freeipmi plugin
+          "CAP_SETPCAP"           # is required for apps, perf and slabinfo plugins
+          "CAP_SYS_ADMIN"         # is required for perf plugin
+          "CAP_SYS_PTRACE"        # is required for apps plugin
+          "CAP_SYS_RESOURCE"      # is required for ebpf plugin
+          "CAP_NET_RAW"           # is required for fping app
+        ];
+        # Sandboxing
+        ProtectSystem = "full";
+        ProtectHome = "read-only";
+        PrivateTmp = true;
+        ProtectControlGroups = true;
+        PrivateMounts = true;
       };
     };
 
diff --git a/nixpkgs/nixos/modules/services/monitoring/prometheus/default.nix b/nixpkgs/nixos/modules/services/monitoring/prometheus/default.nix
index 84a72afac2f7..98aaa9c0f030 100644
--- a/nixpkgs/nixos/modules/services/monitoring/prometheus/default.nix
+++ b/nixpkgs/nixos/modules/services/monitoring/prometheus/default.nix
@@ -46,11 +46,11 @@ let
   cmdlineArgs = cfg.extraFlags ++ [
     "--storage.tsdb.path=${workingDir}/data/"
     "--config.file=${prometheusYml}"
-    "--web.listen-address=${cfg.listenAddress}"
+    "--web.listen-address=${cfg.listenAddress}:${builtins.toString cfg.port}"
     "--alertmanager.notification-queue-capacity=${toString cfg.alertmanagerNotificationQueueCapacity}"
     "--alertmanager.timeout=${toString cfg.alertmanagerTimeout}s"
-  ] ++
-  optional (cfg.webExternalUrl != null) "--web.external-url=${cfg.webExternalUrl}";
+  ] ++ optional (cfg.webExternalUrl != null) "--web.external-url=${cfg.webExternalUrl}"
+    ++ optional (cfg.retentionTime != null)  "--storage.tsdb.retention.time=${cfg.retentionTime}";
 
   filterValidPrometheus = filterAttrsListRecursive (n: v: !(n == "_module" || v == null));
   filterAttrsListRecursive = pred: x:
@@ -489,9 +489,17 @@ in {
       '';
     };
 
+    port = mkOption {
+      type = types.port;
+      default = 9090;
+      description = ''
+        Port to listen on.
+      '';
+    };
+
     listenAddress = mkOption {
       type = types.str;
-      default = "0.0.0.0:9090";
+      default = "0.0.0.0";
       description = ''
         Address to listen on for the web interface, API, and telemetry.
       '';
@@ -616,9 +624,35 @@ in {
         errors, despite a correct configuration.
       '';
     };
+
+    retentionTime = mkOption {
+      type = types.nullOr types.str;
+      default = null;
+      example = "15d";
+      description = ''
+        How long to retain samples in storage.
+      '';
+    };
   };
 
   config = mkIf cfg.enable {
+    assertions = [
+      ( let
+          # Match something with dots (an IPv4 address) or something ending in
+          # a square bracket (an IPv6 addresses) followed by a port number.
+          legacy = builtins.match "(.*\\..*|.*]):([[:digit:]]+)" cfg.listenAddress;
+        in {
+          assertion = legacy == null;
+          message = ''
+            Do not specify the port for Prometheus to listen on in the
+            listenAddress option; use the port option instead:
+              services.prometheus.listenAddress = ${builtins.elemAt legacy 0};
+              services.prometheus.port = ${builtins.elemAt legacy 1};
+          '';
+        }
+      )
+    ];
+
     users.groups.prometheus.gid = config.ids.gids.prometheus;
     users.users.prometheus = {
       description = "Prometheus daemon user";
diff --git a/nixpkgs/nixos/modules/services/monitoring/prometheus/exporters.nix b/nixpkgs/nixos/modules/services/monitoring/prometheus/exporters.nix
index 29f402b212fe..cc71451bf206 100644
--- a/nixpkgs/nixos/modules/services/monitoring/prometheus/exporters.nix
+++ b/nixpkgs/nixos/modules/services/monitoring/prometheus/exporters.nix
@@ -34,6 +34,7 @@ let
     "mail"
     "mikrotik"
     "minio"
+    "modemmanager"
     "nextcloud"
     "nginx"
     "node"
@@ -45,6 +46,7 @@ let
     "surfboard"
     "tor"
     "unifi"
+    "unifi-poller"
     "varnish"
     "wireguard"
   ] (name:
@@ -83,7 +85,8 @@ let
     };
     firewallFilter = mkOption {
       type = types.str;
-      default = "-p tcp -m tcp --dport ${toString port}";
+      default = "-p tcp -m tcp --dport ${toString cfg.${name}.port}";
+      defaultText = "-p tcp -m tcp --dport ${toString port}";
       example = literalExample ''
         "-i eth0 -p tcp -m tcp --dport ${toString port}"
       '';
@@ -172,15 +175,6 @@ in
        (opt: lib.mkRemovedOptionModule [ "services" "prometheus" "${opt}" ] ''
          The prometheus exporters are now configured using `services.prometheus.exporters'.
          See the 18.03 release notes for more information.
-       '' ))
-
-    ++ (lib.forEach [ "enable" "substitutions" "preset" ]
-       (opt: lib.mkRemovedOptionModule [ "fonts" "fontconfig" "ultimate" "${opt}" ] ''
-         The fonts.fontconfig.ultimate module and configuration is obsolete.
-         The repository has since been archived and activity has ceased.
-         https://github.com/bohoomil/fontconfig-ultimate/issues/171.
-         No action should be needed for font configuration, as the fonts.fontconfig
-         module is already used by default.
        '' ));
 
   options.services.prometheus.exporters = mkOption {
diff --git a/nixpkgs/nixos/modules/services/monitoring/prometheus/exporters/modemmanager.nix b/nixpkgs/nixos/modules/services/monitoring/prometheus/exporters/modemmanager.nix
new file mode 100644
index 000000000000..86ea98b94e4c
--- /dev/null
+++ b/nixpkgs/nixos/modules/services/monitoring/prometheus/exporters/modemmanager.nix
@@ -0,0 +1,33 @@
+{ config, lib, pkgs, options }:
+
+with lib;
+
+let
+  cfg = config.services.prometheus.exporters.modemmanager;
+in
+{
+  port = 9539;
+  extraOpts = {
+    refreshRate = mkOption {
+      type = types.str;
+      default = "5s";
+      description = ''
+        How frequently ModemManager will refresh the extended signal quality
+        information for each modem. The duration should be specified in seconds
+        ("5s"), minutes ("1m"), or hours ("1h").
+      '';
+    };
+  };
+  serviceOpts = {
+    serviceConfig = {
+      # Required in order to authenticate with ModemManager via D-Bus.
+      SupplementaryGroups = "networkmanager";
+      ExecStart = ''
+        ${pkgs.prometheus-modemmanager-exporter}/bin/modemmanager_exporter \
+          -addr ${cfg.listenAddress}:${toString cfg.port} \
+          -rate ${cfg.refreshRate} \
+          ${concatStringsSep " \\\n  " cfg.extraFlags}
+      '';
+    };
+  };
+}
diff --git a/nixpkgs/nixos/modules/services/monitoring/prometheus/exporters/unifi-poller.nix b/nixpkgs/nixos/modules/services/monitoring/prometheus/exporters/unifi-poller.nix
new file mode 100644
index 000000000000..394e6e201f03
--- /dev/null
+++ b/nixpkgs/nixos/modules/services/monitoring/prometheus/exporters/unifi-poller.nix
@@ -0,0 +1,34 @@
+{ config, lib, pkgs, options }:
+
+with lib;
+
+let
+  cfg = config.services.prometheus.exporters.unifi-poller;
+
+  configFile = pkgs.writeText "prometheus-unifi-poller-exporter.json" (generators.toJSON {} {
+    poller = { inherit (cfg.log) debug quiet; };
+    unifi = { inherit (cfg) controllers; };
+    influxdb.disable = true;
+    prometheus = {
+      http_listen = "${cfg.listenAddress}:${toString cfg.port}";
+      report_errors = cfg.log.prometheusErrors;
+    };
+  });
+
+in {
+  port = 9130;
+
+  extraOpts = {
+    inherit (options.services.unifi-poller.unifi) controllers;
+    log = {
+      debug = mkEnableOption "debug logging including line numbers, high resolution timestamps, per-device logs.";
+      quiet = mkEnableOption "startup and error logs only.";
+      prometheusErrors = mkEnableOption "emitting errors to prometheus.";
+    };
+  };
+
+  serviceOpts.serviceConfig = {
+    ExecStart = "${pkgs.unifi-poller}/bin/unifi-poller --config ${configFile}";
+    DynamicUser = false;
+  };
+}
diff --git a/nixpkgs/nixos/modules/services/monitoring/smartd.nix b/nixpkgs/nixos/modules/services/monitoring/smartd.nix
index c345ec48a018..c72b4abfcdce 100644
--- a/nixpkgs/nixos/modules/services/monitoring/smartd.nix
+++ b/nixpkgs/nixos/modules/services/monitoring/smartd.nix
@@ -18,9 +18,9 @@ let
     ${optionalString nm.enable ''
       {
       ${pkgs.coreutils}/bin/cat << EOF
-      From: smartd on ${host} <root>
+      From: smartd on ${host} <${nm.sender}>
       To: undisclosed-recipients:;
-      Subject: SMART error on $SMARTD_DEVICESTRING: $SMARTD_FAILTYPE
+      Subject: $SMARTD_SUBJECT
 
       $SMARTD_FULLMESSAGE
       EOF
@@ -129,6 +129,16 @@ in
             description = "Whenever to send e-mail notifications.";
           };
 
+          sender = mkOption {
+            default = "root";
+            example = "example@domain.tld";
+            type = types.str;
+            description = ''
+              Sender of the notification messages.
+              Acts as the value of <literal>email</literal> in the emails' <literal>From: ... </literal> field.
+            '';
+          };
+
           recipient = mkOption {
             default = "root";
             type = types.str;
@@ -229,11 +239,7 @@ in
 
     systemd.services.smartd = {
       description = "S.M.A.R.T. Daemon";
-
       wantedBy = [ "multi-user.target" ];
-
-      path = [ pkgs.nettools ]; # for hostname and dnsdomanname calls in smartd
-
       serviceConfig.ExecStart = "${pkgs.smartmontools}/sbin/smartd ${lib.concatStringsSep " " cfg.extraOptions} --no-fork --configfile=${smartdConf}";
     };
 
diff --git a/nixpkgs/nixos/modules/services/monitoring/teamviewer.nix b/nixpkgs/nixos/modules/services/monitoring/teamviewer.nix
index dd98ecab828d..8d781d82d086 100644
--- a/nixpkgs/nixos/modules/services/monitoring/teamviewer.nix
+++ b/nixpkgs/nixos/modules/services/monitoring/teamviewer.nix
@@ -15,7 +15,7 @@ in
   options = {
 
     services.teamviewer.enable = mkEnableOption "TeamViewer daemon";
-      
+
   };
 
   ###### implementation
diff --git a/nixpkgs/nixos/modules/services/monitoring/tuptime.nix b/nixpkgs/nixos/modules/services/monitoring/tuptime.nix
index 731260a5c20a..8f79d9165990 100644
--- a/nixpkgs/nixos/modules/services/monitoring/tuptime.nix
+++ b/nixpkgs/nixos/modules/services/monitoring/tuptime.nix
@@ -32,7 +32,10 @@ in {
 
     environment.systemPackages = [ pkgs.tuptime ];
 
-    users.users.tuptime.description = "tuptime database owner";
+    users = {
+      groups._tuptime.members = [ "_tuptime" ];
+      users._tuptime.description = "tuptime database owner";
+    };
 
     systemd = {
       services = {
@@ -45,7 +48,7 @@ in {
           serviceConfig = {
             StateDirectory = "tuptime";
             Type = "oneshot";
-            User = "tuptime";
+            User = "_tuptime";
             RemainAfterExit = true;
             ExecStart = "${pkgs.tuptime}/bin/tuptime -x";
             ExecStop = "${pkgs.tuptime}/bin/tuptime -xg";
@@ -57,7 +60,7 @@ in {
           serviceConfig = {
             StateDirectory = "tuptime";
             Type = "oneshot";
-            User = "tuptime";
+            User = "_tuptime";
             ExecStart = "${pkgs.tuptime}/bin/tuptime -x";
           };
         };
diff --git a/nixpkgs/nixos/modules/services/monitoring/unifi-poller.nix b/nixpkgs/nixos/modules/services/monitoring/unifi-poller.nix
new file mode 100644
index 000000000000..208f5e4875b4
--- /dev/null
+++ b/nixpkgs/nixos/modules/services/monitoring/unifi-poller.nix
@@ -0,0 +1,242 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.services.unifi-poller;
+
+  configFile = pkgs.writeText "unifi-poller.json" (generators.toJSON {} {
+    inherit (cfg) poller influxdb prometheus unifi;
+  });
+
+in {
+  options.services.unifi-poller = {
+    enable = mkEnableOption "unifi-poller";
+
+    poller = {
+      debug = mkOption {
+        type = types.bool;
+        default = false;
+        description = ''
+          Turns on line numbers, microsecond logging, and a per-device log.
+          This may be noisy if you have a lot of devices. It adds one line per device.
+        '';
+      };
+      quiet = mkOption {
+        type = types.bool;
+        default = false;
+        description = ''
+          Turns off per-interval logs. Only startup and error logs will be emitted.
+        '';
+      };
+      plugins = mkOption {
+        type = with types; listOf str;
+        default = [];
+        description = ''
+          Load additional plugins.
+        '';
+      };
+    };
+
+    prometheus = {
+      disable = mkOption {
+        type = types.bool;
+        default = false;
+        description = ''
+          Whether to disable the prometheus ouput plugin.
+        '';
+      };
+      http_listen = mkOption {
+        type = types.str;
+        default = "[::]:9130";
+        description = ''
+          Bind the prometheus exporter to this IP or hostname.
+        '';
+      };
+      report_errors = mkOption {
+        type = types.bool;
+        default = false;
+        description = ''
+          Whether to report errors.
+        '';
+      };
+    };
+
+    influxdb = {
+      disable = mkOption {
+        type = types.bool;
+        default = false;
+        description = ''
+          Whether to disable the influxdb ouput plugin.
+        '';
+      };
+      url = mkOption {
+        type = types.str;
+        default = "http://127.0.0.1:8086";
+        description = ''
+          URL of the influxdb host.
+        '';
+      };
+      user = mkOption {
+        type = types.str;
+        default = "unifipoller";
+        description = ''
+          Username for the influxdb.
+        '';
+      };
+      pass = mkOption {
+        type = types.path;
+        default = pkgs.writeText "unifi-poller-influxdb-default.password" "unifipoller";
+        defaultText = "unifi-poller-influxdb-default.password";
+        description = ''
+          Path of a file containing the password for influxdb.
+          This file needs to be readable by the unifi-poller user.
+        '';
+        apply = v: "file://${v}";
+      };
+      db = mkOption {
+        type = types.str;
+        default = "unifi";
+        description = ''
+          Database name. Database should exist.
+        '';
+      };
+      verify_ssl = mkOption {
+        type = types.bool;
+        default = true;
+        description = ''
+          Verify the influxdb's certificate.
+        '';
+      };
+      interval = mkOption {
+        type = types.str;
+        default = "30s";
+        description = ''
+          Setting this lower than the Unifi controller's refresh
+          interval may lead to zeroes in your database.
+        '';
+      };
+    };
+
+    unifi = let
+      controllerOptions = {
+        user = mkOption {
+          type = types.str;
+          default = "unifi";
+          description = ''
+            Unifi service user name.
+          '';
+        };
+        pass = mkOption {
+          type = types.path;
+          default = pkgs.writeText "unifi-poller-unifi-default.password" "unifi";
+          defaultText = "unifi-poller-unifi-default.password";
+          description = ''
+            Path of a file containing the password for the unifi service user.
+            This file needs to be readable by the unifi-poller user.
+          '';
+          apply = v: "file://${v}";
+        };
+        url = mkOption {
+          type = types.str;
+          default = "https://unifi:8443";
+          description = ''
+            URL of the Unifi controller.
+          '';
+        };
+        sites = mkOption {
+          type = with types; either (enum [ "default" "all" ]) (listOf str);
+          default = "all";
+          description = ''
+            List of site names for which statistics should be exported.
+            Or the string "default" for the default site or the string "all" for all sites.
+          '';
+          apply = toList;
+        };
+        save_ids = mkOption {
+          type = types.bool;
+          default = false;
+          description = ''
+            Collect and save data from the intrusion detection system to influxdb.
+          '';
+        };
+        save_dpi = mkOption {
+          type = types.bool;
+          default = false;
+          description = ''
+            Collect and save data from deep packet inspection.
+            Adds around 150 data points and impacts performance.
+          '';
+        };
+        save_sites = mkOption {
+          type = types.bool;
+          default = true;
+          description = ''
+            Collect and save site data.
+          '';
+        };
+        hash_pii = mkOption {
+          type = types.bool;
+          default = false;
+          description = ''
+            Hash, with md5, client names and MAC addresses. This attempts
+            to protect personally identifiable information.
+          '';
+        };
+        verify_ssl = mkOption {
+          type = types.bool;
+          default = true;
+          description = ''
+            Verify the Unifi controller's certificate.
+          '';
+        };
+      };
+
+    in {
+      dynamic = mkOption {
+        type = types.bool;
+        default = false;
+        description = ''
+          Let prometheus select which controller to poll when scraping.
+          Use with default credentials. See unifi-poller wiki for more.
+        '';
+      };
+
+      defaults = controllerOptions;
+
+      controllers = mkOption {
+        type = with types; listOf (submodule { options = controllerOptions; });
+        default = [];
+        description = ''
+          List of Unifi controllers to poll. Use defaults if empty.
+        '';
+        apply = map (flip removeAttrs [ "_module" ]);
+      };
+    };
+  };
+
+  config = mkIf cfg.enable {
+    users.groups.unifi-poller = { };
+    users.users.unifi-poller = {
+      description = "unifi-poller Service User";
+      group = "unifi-poller";
+      isSystemUser = true;
+    };
+
+    systemd.services.unifi-poller = {
+      wantedBy = [ "multi-user.target" ];
+      after = [ "network.target" ];
+      serviceConfig = {
+        ExecStart = "${pkgs.unifi-poller}/bin/unifi-poller --config ${configFile}";
+        Restart = "always";
+        PrivateTmp = true;
+        ProtectHome = true;
+        ProtectSystem = "full";
+        DevicePolicy = "closed";
+        NoNewPrivileges = true;
+        User = "unifi-poller";
+        WorkingDirectory = "/tmp";
+      };
+    };
+  };
+}
diff --git a/nixpkgs/nixos/modules/services/monitoring/zabbix-agent.nix b/nixpkgs/nixos/modules/services/monitoring/zabbix-agent.nix
index b3383ed628b2..73eed7aa66af 100644
--- a/nixpkgs/nixos/modules/services/monitoring/zabbix-agent.nix
+++ b/nixpkgs/nixos/modules/services/monitoring/zabbix-agent.nix
@@ -3,8 +3,9 @@
 let
   cfg = config.services.zabbixAgent;
 
-  inherit (lib) mkDefault mkEnableOption mkIf mkOption;
+  inherit (lib) mkDefault mkEnableOption mkIf mkMerge mkOption;
   inherit (lib) attrValues concatMapStringsSep literalExample optionalString types;
+  inherit (lib.generators) toKeyValue;
 
   user = "zabbix-agent";
   group = "zabbix-agent";
@@ -14,19 +15,15 @@ let
     paths = attrValues cfg.modules;
   };
 
-  configFile = pkgs.writeText "zabbix_agent.conf" ''
-    LogType = console
-    Server = ${cfg.server}
-    ListenIP = ${cfg.listen.ip}
-    ListenPort = ${toString cfg.listen.port}
-    ${optionalString (cfg.modules != {}) "LoadModulePath = ${moduleEnv}/lib"}
-    ${concatMapStringsSep "\n" (name: "LoadModule = ${name}") (builtins.attrNames cfg.modules)}
-    ${cfg.extraConfig}
-  '';
+  configFile = pkgs.writeText "zabbix_agent.conf" (toKeyValue { listsAsDuplicateKeys = true; } cfg.settings);
 
 in
 
 {
+  imports = [
+    (lib.mkRemovedOptionModule [ "services" "zabbixAgent" "extraConfig" ] "Use services.zabbixAgent.settings instead.")
+  ];
+
   # interface
 
   options = {
@@ -105,15 +102,18 @@ in
         '';
       };
 
-      # TODO: for bonus points migrate this to https://github.com/NixOS/rfcs/pull/42
-      extraConfig = mkOption {
-        default = "";
-        type = types.lines;
+      settings = mkOption {
+        type = with types; attrsOf (oneOf [ int str (listOf str) ]);
+        default = {};
         description = ''
-          Configuration that is injected verbatim into the configuration file. Refer to
+          Zabbix Agent configuration. Refer to
           <link xlink:href="https://www.zabbix.com/documentation/current/manual/appendix/config/zabbix_agentd"/>
           for details on supported values.
         '';
+        example = {
+          Hostname = "example.org";
+          DebugLevel = 4;
+        };
       };
 
     };
@@ -124,6 +124,17 @@ in
 
   config = mkIf cfg.enable {
 
+    services.zabbixAgent.settings = mkMerge [
+      {
+        LogType = "console";
+        Server = cfg.server;
+        ListenIP = cfg.listen.ip;
+        ListenPort = cfg.listen.port;
+        LoadModule = builtins.attrNames cfg.modules;
+      }
+      (mkIf (cfg.modules != {}) { LoadModulePath = "${moduleEnv}/lib"; })
+    ];
+
     networking.firewall = mkIf cfg.openFirewall {
       allowedTCPPorts = [ cfg.listen.port ];
     };
diff --git a/nixpkgs/nixos/modules/services/monitoring/zabbix-proxy.nix b/nixpkgs/nixos/modules/services/monitoring/zabbix-proxy.nix
index 9d214469c3b3..2c8b8b92cb38 100644
--- a/nixpkgs/nixos/modules/services/monitoring/zabbix-proxy.nix
+++ b/nixpkgs/nixos/modules/services/monitoring/zabbix-proxy.nix
@@ -5,8 +5,9 @@ let
   pgsql = config.services.postgresql;
   mysql = config.services.mysql;
 
-  inherit (lib) mkDefault mkEnableOption mkIf mkOption;
-  inherit (lib) attrValues concatMapStringsSep literalExample optional optionalAttrs optionalString types;
+  inherit (lib) mkAfter mkDefault mkEnableOption mkIf mkMerge mkOption;
+  inherit (lib) attrValues concatMapStringsSep getName literalExample optional optionalAttrs optionalString types;
+  inherit (lib.generators) toKeyValue;
 
   user = "zabbix";
   group = "zabbix";
@@ -19,24 +20,7 @@ let
     paths = attrValues cfg.modules;
   };
 
-  configFile = pkgs.writeText "zabbix_proxy.conf" ''
-    LogType = console
-    ListenIP = ${cfg.listen.ip}
-    ListenPort = ${toString cfg.listen.port}
-    Server = ${cfg.server}
-    # TODO: set to cfg.database.socket if database type is pgsql?
-    DBHost = ${optionalString (cfg.database.createLocally != true) cfg.database.host}
-    ${optionalString (cfg.database.createLocally != true) "DBPort = ${cfg.database.port}"}
-    DBName = ${cfg.database.name}
-    DBUser = ${cfg.database.user}
-    ${optionalString (cfg.database.passwordFile != null) "Include ${passwordFile}"}
-    ${optionalString (mysqlLocal && cfg.database.socket != null) "DBSocket = ${cfg.database.socket}"}
-    SocketDir = ${runtimeDir}
-    FpingLocation = /run/wrappers/bin/fping
-    ${optionalString (cfg.modules != {}) "LoadModulePath = ${moduleEnv}/lib"}
-    ${concatMapStringsSep "\n" (name: "LoadModule = ${name}") (builtins.attrNames cfg.modules)}
-    ${cfg.extraConfig}
-  '';
+  configFile = pkgs.writeText "zabbix_proxy.conf" (toKeyValue { listsAsDuplicateKeys = true; } cfg.settings);
 
   mysqlLocal = cfg.database.createLocally && cfg.database.type == "mysql";
   pgsqlLocal = cfg.database.createLocally && cfg.database.type == "pgsql";
@@ -44,6 +28,10 @@ let
 in
 
 {
+  imports = [
+    (lib.mkRemovedOptionModule [ "services" "zabbixProxy" "extraConfig" ] "Use services.zabbixProxy.settings instead.")
+  ];
+
   # interface
 
   options = {
@@ -182,15 +170,19 @@ in
         '';
       };
 
-      # TODO: for bonus points migrate this to https://github.com/NixOS/rfcs/pull/42
-      extraConfig = mkOption {
-        default = "";
-        type = types.lines;
+      settings = mkOption {
+        type = with types; attrsOf (oneOf [ int str (listOf str) ]);
+        default = {};
         description = ''
-          Configuration that is injected verbatim into the configuration file. Refer to
+          Zabbix Proxy configuration. Refer to
           <link xlink:href="https://www.zabbix.com/documentation/current/manual/appendix/config/zabbix_proxy"/>
           for details on supported values.
         '';
+        example = {
+          CacheSize = "1G";
+          SSHKeyLocation = "/var/lib/zabbix/.ssh";
+          StartPingers = 32;
+        };
       };
 
     };
@@ -213,6 +205,26 @@ in
       }
     ];
 
+    services.zabbixProxy.settings = mkMerge [
+      {
+        LogType = "console";
+        ListenIP = cfg.listen.ip;
+        ListenPort = cfg.listen.port;
+        Server = cfg.server;
+        # TODO: set to cfg.database.socket if database type is pgsql?
+        DBHost = optionalString (cfg.database.createLocally != true) cfg.database.host;
+        DBName = cfg.database.name;
+        DBUser = cfg.database.user;
+        SocketDir = runtimeDir;
+        FpingLocation = "/run/wrappers/bin/fping";
+        LoadModule = builtins.attrNames cfg.modules;
+      }
+      (mkIf (cfg.database.createLocally != true) { DBPort = cfg.database.port; })
+      (mkIf (cfg.database.passwordFile != null) { Include = [ "${passwordFile}" ]; })
+      (mkIf (mysqlLocal && cfg.database.socket != null) { DBSocket = cfg.database.socket; })
+      (mkIf (cfg.modules != {}) { LoadModulePath = "${moduleEnv}/lib"; })
+    ];
+
     networking.firewall = mkIf cfg.openFirewall {
       allowedTCPPorts = [ cfg.listen.port ];
     };
@@ -220,14 +232,15 @@ in
     services.mysql = optionalAttrs mysqlLocal {
       enable = true;
       package = mkDefault pkgs.mariadb;
-      ensureDatabases = [ cfg.database.name ];
-      ensureUsers = [
-        { name = cfg.database.user;
-          ensurePermissions = { "${cfg.database.name}.*" = "ALL PRIVILEGES"; };
-        }
-      ];
     };
 
+    systemd.services.mysql.postStart = mkAfter (optionalString mysqlLocal ''
+      ( echo "CREATE DATABASE IF NOT EXISTS \`${cfg.database.name}\` CHARACTER SET utf8 COLLATE utf8_bin;"
+        echo "CREATE USER IF NOT EXISTS '${cfg.database.user}'@'localhost' IDENTIFIED WITH ${if (getName config.services.mysql.package == getName pkgs.mariadb) then "unix_socket" else "auth_socket"};"
+        echo "GRANT ALL PRIVILEGES ON \`${cfg.database.name}\`.* TO '${cfg.database.user}'@'localhost';"
+      ) | ${config.services.mysql.package}/bin/mysql -N
+    '');
+
     services.postgresql = optionalAttrs pgsqlLocal {
       enable = true;
       ensureDatabases = [ cfg.database.name ];
diff --git a/nixpkgs/nixos/modules/services/monitoring/zabbix-server.nix b/nixpkgs/nixos/modules/services/monitoring/zabbix-server.nix
index b4e4378ce1e7..c8658634ecb6 100644
--- a/nixpkgs/nixos/modules/services/monitoring/zabbix-server.nix
+++ b/nixpkgs/nixos/modules/services/monitoring/zabbix-server.nix
@@ -5,8 +5,9 @@ let
   pgsql = config.services.postgresql;
   mysql = config.services.mysql;
 
-  inherit (lib) mkDefault mkEnableOption mkIf mkOption;
-  inherit (lib) attrValues concatMapStringsSep literalExample optional optionalAttrs optionalString types;
+  inherit (lib) mkAfter mkDefault mkEnableOption mkIf mkMerge mkOption;
+  inherit (lib) attrValues concatMapStringsSep getName literalExample optional optionalAttrs optionalString types;
+  inherit (lib.generators) toKeyValue;
 
   user = "zabbix";
   group = "zabbix";
@@ -19,24 +20,7 @@ let
     paths = attrValues cfg.modules;
   };
 
-  configFile = pkgs.writeText "zabbix_server.conf" ''
-    LogType = console
-    ListenIP = ${cfg.listen.ip}
-    ListenPort = ${toString cfg.listen.port}
-    # TODO: set to cfg.database.socket if database type is pgsql?
-    DBHost = ${optionalString (cfg.database.createLocally != true) cfg.database.host}
-    ${optionalString (cfg.database.createLocally != true) "DBPort = ${cfg.database.port}"}
-    DBName = ${cfg.database.name}
-    DBUser = ${cfg.database.user}
-    ${optionalString (cfg.database.passwordFile != null) "Include ${passwordFile}"}
-    ${optionalString (mysqlLocal && cfg.database.socket != null) "DBSocket = ${cfg.database.socket}"}
-    PidFile = ${runtimeDir}/zabbix_server.pid
-    SocketDir = ${runtimeDir}
-    FpingLocation = /run/wrappers/bin/fping
-    ${optionalString (cfg.modules != {}) "LoadModulePath = ${moduleEnv}/lib"}
-    ${concatMapStringsSep "\n" (name: "LoadModule = ${name}") (builtins.attrNames cfg.modules)}
-    ${cfg.extraConfig}
-  '';
+  configFile = pkgs.writeText "zabbix_server.conf" (toKeyValue { listsAsDuplicateKeys = true; } cfg.settings);
 
   mysqlLocal = cfg.database.createLocally && cfg.database.type == "mysql";
   pgsqlLocal = cfg.database.createLocally && cfg.database.type == "pgsql";
@@ -47,6 +31,7 @@ in
   imports = [
     (lib.mkRenamedOptionModule [ "services" "zabbixServer" "dbServer" ] [ "services" "zabbixServer" "database" "host" ])
     (lib.mkRemovedOptionModule [ "services" "zabbixServer" "dbPassword" ] "Use services.zabbixServer.database.passwordFile instead.")
+    (lib.mkRemovedOptionModule [ "services" "zabbixServer" "extraConfig" ] "Use services.zabbixServer.settings instead.")
   ];
 
   # interface
@@ -176,15 +161,19 @@ in
         '';
       };
 
-      # TODO: for bonus points migrate this to https://github.com/NixOS/rfcs/pull/42
-      extraConfig = mkOption {
-        default = "";
-        type = types.lines;
+      settings = mkOption {
+        type = with types; attrsOf (oneOf [ int str (listOf str) ]);
+        default = {};
         description = ''
-          Configuration that is injected verbatim into the configuration file. Refer to
+          Zabbix Server configuration. Refer to
           <link xlink:href="https://www.zabbix.com/documentation/current/manual/appendix/config/zabbix_server"/>
           for details on supported values.
         '';
+        example = {
+          CacheSize = "1G";
+          SSHKeyLocation = "/var/lib/zabbix/.ssh";
+          StartPingers = 32;
+        };
       };
 
     };
@@ -204,6 +193,26 @@ in
       }
     ];
 
+    services.zabbixServer.settings = mkMerge [
+      {
+        LogType = "console";
+        ListenIP = cfg.listen.ip;
+        ListenPort = cfg.listen.port;
+        # TODO: set to cfg.database.socket if database type is pgsql?
+        DBHost = optionalString (cfg.database.createLocally != true) cfg.database.host;
+        DBName = cfg.database.name;
+        DBUser = cfg.database.user;
+        PidFile = "${runtimeDir}/zabbix_server.pid";
+        SocketDir = runtimeDir;
+        FpingLocation = "/run/wrappers/bin/fping";
+        LoadModule = builtins.attrNames cfg.modules;
+      }
+      (mkIf (cfg.database.createLocally != true) { DBPort = cfg.database.port; })
+      (mkIf (cfg.database.passwordFile != null) { Include = [ "${passwordFile}" ]; })
+      (mkIf (mysqlLocal && cfg.database.socket != null) { DBSocket = cfg.database.socket; })
+      (mkIf (cfg.modules != {}) { LoadModulePath = "${moduleEnv}/lib"; })
+    ];
+
     networking.firewall = mkIf cfg.openFirewall {
       allowedTCPPorts = [ cfg.listen.port ];
     };
@@ -211,14 +220,15 @@ in
     services.mysql = optionalAttrs mysqlLocal {
       enable = true;
       package = mkDefault pkgs.mariadb;
-      ensureDatabases = [ cfg.database.name ];
-      ensureUsers = [
-        { name = cfg.database.user;
-          ensurePermissions = { "${cfg.database.name}.*" = "ALL PRIVILEGES"; };
-        }
-      ];
     };
 
+    systemd.services.mysql.postStart = mkAfter (optionalString mysqlLocal ''
+      ( echo "CREATE DATABASE IF NOT EXISTS \`${cfg.database.name}\` CHARACTER SET utf8 COLLATE utf8_bin;"
+        echo "CREATE USER IF NOT EXISTS '${cfg.database.user}'@'localhost' IDENTIFIED WITH ${if (getName config.services.mysql.package == getName pkgs.mariadb) then "unix_socket" else "auth_socket"};"
+        echo "GRANT ALL PRIVILEGES ON \`${cfg.database.name}\`.* TO '${cfg.database.user}'@'localhost';"
+      ) | ${config.services.mysql.package}/bin/mysql -N
+    '');
+
     services.postgresql = optionalAttrs pgsqlLocal {
       enable = true;
       ensureDatabases = [ cfg.database.name ];
diff --git a/nixpkgs/nixos/modules/services/network-filesystems/cachefilesd.nix b/nixpkgs/nixos/modules/services/network-filesystems/cachefilesd.nix
index 619813408405..229c9665419f 100644
--- a/nixpkgs/nixos/modules/services/network-filesystems/cachefilesd.nix
+++ b/nixpkgs/nixos/modules/services/network-filesystems/cachefilesd.nix
@@ -43,17 +43,21 @@ in
 
   config = mkIf cfg.enable {
 
+    boot.kernelModules = [ "cachefiles" ];
+
     systemd.services.cachefilesd = {
       description = "Local network file caching management daemon";
       wantedBy = [ "multi-user.target" ];
-      path = [ pkgs.kmod pkgs.cachefilesd ];
-      script = ''
-        modprobe -qab cachefiles
-        mkdir -p ${cfg.cacheDir}
-        chmod 700 ${cfg.cacheDir}
-        exec cachefilesd -n -f ${cfgFile}
-      '';
+      serviceConfig = {
+        Type = "exec";
+        ExecStart = "${pkgs.cachefilesd}/bin/cachefilesd -n -f ${cfgFile}";
+        Restart = "on-failure";
+        PrivateTmp = true;
+      };
     };
 
+    systemd.tmpfiles.rules = [
+      "d ${cfg.cacheDir} 0700 root root - -"
+    ];
   };
 }
diff --git a/nixpkgs/nixos/modules/services/network-filesystems/ipfs.nix b/nixpkgs/nixos/modules/services/network-filesystems/ipfs.nix
index 7d18410ff0a4..f298f831fa7b 100644
--- a/nixpkgs/nixos/modules/services/network-filesystems/ipfs.nix
+++ b/nixpkgs/nixos/modules/services/network-filesystems/ipfs.nix
@@ -25,6 +25,15 @@ let
       then "/${lib.concatStringsSep "/" (lib.tail addr)}"
     else null; # not valid for listen stream, skip
 
+  multiaddrToListenDatagram = addrRaw: let
+      addr = splitMulitaddr addrRaw;
+      s = builtins.elemAt addr;
+    in if s 0 == "ip4" && s 2 == "udp"
+      then "${s 1}:${s 3}"
+    else if s 0 == "ip6" && s 2 == "udp"
+      then "[${s 1}]:${s 3}"
+    else null; # not valid for listen datagram, skip
+
 in {
 
   ###### interface
@@ -96,6 +105,8 @@ in {
         default = [
           "/ip4/0.0.0.0/tcp/4001"
           "/ip6/::/tcp/4001"
+          "/ip4/0.0.0.0/udp/4001/quic"
+          "/ip6/::/udp/4001/quic"
         ];
         description = "Where IPFS listens for incoming p2p connections";
       };
@@ -266,9 +277,14 @@ in {
 
     systemd.sockets.ipfs-gateway = {
       wantedBy = [ "sockets.target" ];
-      socketConfig.ListenStream = let
-          fromCfg = multiaddrToListenStream cfg.gatewayAddress;
-        in [ "" ] ++ lib.optional (fromCfg != null) fromCfg;
+      socketConfig = {
+        ListenStream = let
+            fromCfg = multiaddrToListenStream cfg.gatewayAddress;
+          in [ "" ] ++ lib.optional (fromCfg != null) fromCfg;
+        ListenDatagram = let
+            fromCfg = multiaddrToListenDatagram cfg.gatewayAddress;
+          in [ "" ] ++ lib.optional (fromCfg != null) fromCfg;
+      };
     };
 
     systemd.sockets.ipfs-api = {
diff --git a/nixpkgs/nixos/modules/services/network-filesystems/orangefs/server.nix b/nixpkgs/nixos/modules/services/network-filesystems/orangefs/server.nix
index 74ebdc134024..8eb754fe6110 100644
--- a/nixpkgs/nixos/modules/services/network-filesystems/orangefs/server.nix
+++ b/nixpkgs/nixos/modules/services/network-filesystems/orangefs/server.nix
@@ -83,14 +83,14 @@ in {
       };
 
       dataStorageSpace = mkOption {
-        type = types.str;
+        type = types.nullOr types.str;
         default = null;
         example = "/data/storage";
         description = "Directory for data storage.";
       };
 
       metadataStorageSpace = mkOption {
-        type = types.str;
+        type = types.nullOr types.str;
         default = null;
         example = "/data/meta";
         description = "Directory for meta data storage.";
diff --git a/nixpkgs/nixos/modules/services/network-filesystems/samba.nix b/nixpkgs/nixos/modules/services/network-filesystems/samba.nix
index 08c912e0fcd4..7d3c601d6cd5 100644
--- a/nixpkgs/nixos/modules/services/network-filesystems/samba.nix
+++ b/nixpkgs/nixos/modules/services/network-filesystems/samba.nix
@@ -248,7 +248,7 @@ in
         };
 
         security.pam.services.samba = {};
-
+        environment.systemPackages = [ config.services.samba.package ];
       })
     ];
 
diff --git a/nixpkgs/nixos/modules/services/networking/biboumi.nix b/nixpkgs/nixos/modules/services/networking/biboumi.nix
new file mode 100644
index 000000000000..66ddca93d818
--- /dev/null
+++ b/nixpkgs/nixos/modules/services/networking/biboumi.nix
@@ -0,0 +1,269 @@
+{ config, lib, pkgs, options, ... }:
+with lib;
+let
+  cfg = config.services.biboumi;
+  inherit (config.environment) etc;
+  rootDir = "/run/biboumi/mnt-root";
+  stateDir = "/var/lib/biboumi";
+  settingsFile = pkgs.writeText "biboumi.cfg" (
+    generators.toKeyValue {
+      mkKeyValue = k: v:
+        if v == null then ""
+        else generators.mkKeyValueDefault {} "=" k v;
+    } cfg.settings);
+  need_CAP_NET_BIND_SERVICE = cfg.settings.identd_port != 0 && cfg.settings.identd_port < 1024;
+in
+{
+  options = {
+    services.biboumi = {
+      enable = mkEnableOption "the Biboumi XMPP gateway to IRC";
+
+      settings = mkOption {
+        description = ''
+          See <link xlink:href="https://lab.louiz.org/louiz/biboumi/blob/8.5/doc/biboumi.1.rst">biboumi 8.5</link>
+          for documentation.
+        '';
+        default = {};
+        type = types.submodule {
+          freeformType = with types;
+            (attrsOf (nullOr (oneOf [str int bool]))) // {
+              description = "settings option";
+            };
+          options.admin = mkOption {
+            type = with types; listOf str;
+            default = [];
+            example = ["admin@example.org"];
+            apply = concatStringsSep ":";
+            description = ''
+              The bare JID of the gateway administrator. This JID will have more
+              privileges than other standard users, for example some administration
+              ad-hoc commands will only be available to that JID.
+            '';
+          };
+          options.ca_file = mkOption {
+            type = types.path;
+            default = "/etc/ssl/certs/ca-certificates.crt";
+            description = ''
+              Specifies which file should be used as the list of trusted CA
+              when negociating a TLS session.
+            '';
+          };
+          options.db_name = mkOption {
+            type = with types; either path str;
+            default = "${stateDir}/biboumi.sqlite";
+            description = ''
+              The name of the database to use.
+            '';
+            example = "postgresql://user:secret@localhost";
+          };
+          options.hostname = mkOption {
+            type = types.str;
+            example = "biboumi.example.org";
+            description = ''
+              The hostname served by the XMPP gateway.
+              This domain must be configured in the XMPP server
+              as an external component.
+            '';
+          };
+          options.identd_port = mkOption {
+            type = types.port;
+            default = 113;
+            example = 0;
+            description = ''
+              The TCP port on which to listen for identd queries.
+            '';
+          };
+          options.log_level = mkOption {
+            type = types.ints.between 0 3;
+            default = 1;
+            description = ''
+              Indicate what type of log messages to write in the logs.
+              0 is debug, 1 is info, 2 is warning, 3 is error.
+            '';
+          };
+          options.password = mkOption {
+            type = with types; nullOr str;
+            description = ''
+              The password used to authenticate the XMPP component to your XMPP server.
+              This password must be configured in the XMPP server,
+              associated with the external component on
+              <link linkend="opt-services.biboumi.settings.hostname">hostname</link>.
+
+              Set it to null and use <link linkend="opt-services.biboumi.credentialsFile">credentialsFile</link>
+              if you do not want this password to go into the Nix store.
+            '';
+          };
+          options.persistent_by_default = mkOption {
+            type = types.bool;
+            default = false;
+            description = ''
+              Whether all rooms will be persistent by default:
+              the value of the “persistent” option in the global configuration of each
+              user will be “true”, but the value of each individual room will still
+              default to false. This means that a user just needs to change the global
+              “persistent” configuration option to false in order to override this.
+            '';
+          };
+          options.policy_directory = mkOption {
+            type = types.path;
+            default = "${pkgs.biboumi}/etc/biboumi";
+            description = ''
+              A directory that should contain the policy files,
+              used to customize Botan’s behaviour
+              when negociating the TLS connections with the IRC servers.
+            '';
+          };
+          options.port = mkOption {
+            type = types.port;
+            default = 5347;
+            description = ''
+              The TCP port to use to connect to the local XMPP component.
+            '';
+          };
+          options.realname_customization = mkOption {
+            type = types.bool;
+            default = true;
+            description = ''
+              Whether the users will be able to use
+              the ad-hoc commands that lets them configure
+              their realname and username.
+            '';
+          };
+          options.realname_from_jid = mkOption {
+            type = types.bool;
+            default = false;
+            description = ''
+              Whether the realname and username of each biboumi
+              user will be extracted from their JID.
+              Otherwise they will be set to the nick
+              they used to connect to the IRC server.
+            '';
+          };
+          options.xmpp_server_ip = mkOption {
+            type = types.str;
+            default = "127.0.0.1";
+            description = ''
+              The IP address to connect to the XMPP server on.
+              The connection to the XMPP server is unencrypted,
+              so the biboumi instance and the server should
+              normally be on the same host.
+            '';
+          };
+        };
+      };
+
+      credentialsFile = mkOption {
+        type = types.path;
+        description = ''
+          Path to a configuration file to be merged with the settings.
+          Beware not to surround "=" with spaces when setting biboumi's options in this file.
+          Useful to merge a file which is better kept out of the Nix store
+          because it contains sensible data like
+          <link linkend="opt-services.biboumi.settings.password">password</link>.
+        '';
+        default = "/dev/null";
+        example = "/run/keys/biboumi.cfg";
+      };
+
+      openFirewall = mkEnableOption "opening of the identd port in the firewall";
+    };
+  };
+
+  config = mkIf cfg.enable {
+    networking.firewall = mkIf (cfg.openFirewall && cfg.settings.identd_port != 0)
+      { allowedTCPPorts = [ cfg.settings.identd_port ]; };
+
+    systemd.services.biboumi = {
+      description = "Biboumi, XMPP to IRC gateway";
+      after = [ "network.target" ];
+      wantedBy = [ "multi-user.target" ];
+
+      serviceConfig = {
+        Type = "notify";
+        # Biboumi supports systemd's watchdog.
+        WatchdogSec = 20;
+        Restart = "always";
+        # Use "+" because credentialsFile may not be accessible to User= or Group=.
+        ExecStartPre = [("+" + pkgs.writeShellScript "biboumi-prestart" ''
+          set -eux
+          cat ${settingsFile} '${cfg.credentialsFile}' |
+          install -m 644 /dev/stdin /run/biboumi/biboumi.cfg
+        '')];
+        ExecStart = "${pkgs.biboumi}/bin/biboumi /run/biboumi/biboumi.cfg";
+        ExecReload = "${pkgs.coreutils}/bin/kill -USR1 $MAINPID";
+        # Firewalls needing opening for output connections can still do that
+        # selectively for biboumi with:
+        # users.users.biboumi.isSystemUser = true;
+        # and, for example:
+        # networking.nftables.ruleset = ''
+        #   add rule inet filter output meta skuid biboumi tcp accept
+        # '';
+        DynamicUser = true;
+        RootDirectory = rootDir;
+        RootDirectoryStartOnly = true;
+        InaccessiblePaths = [ "-+${rootDir}" ];
+        RuntimeDirectory = [ "biboumi" (removePrefix "/run/" rootDir) ];
+        RuntimeDirectoryMode = "700";
+        StateDirectory = "biboumi";
+        StateDirectoryMode = "700";
+        MountAPIVFS = true;
+        UMask = "0066";
+        BindPaths = [
+          stateDir
+          # This is for Type="notify"
+          # See https://github.com/systemd/systemd/issues/3544
+          "/run/systemd/notify"
+          "/run/systemd/journal/socket"
+        ];
+        BindReadOnlyPaths = [
+          builtins.storeDir
+          "/etc"
+        ];
+        # The following options are only for optimizing:
+        # systemd-analyze security biboumi
+        AmbientCapabilities = [ (optionalString need_CAP_NET_BIND_SERVICE "CAP_NET_BIND_SERVICE") ];
+        CapabilityBoundingSet = [ (optionalString need_CAP_NET_BIND_SERVICE "CAP_NET_BIND_SERVICE") ];
+        # ProtectClock= adds DeviceAllow=char-rtc r
+        DeviceAllow = "";
+        LockPersonality = true;
+        MemoryDenyWriteExecute = true;
+        NoNewPrivileges = true;
+        PrivateDevices = true;
+        PrivateMounts = true;
+        PrivateNetwork = mkDefault false;
+        PrivateTmp = true;
+        # PrivateUsers=true breaks AmbientCapabilities=CAP_NET_BIND_SERVICE
+        # See https://bugs.archlinux.org/task/65921
+        PrivateUsers = !need_CAP_NET_BIND_SERVICE;
+        ProtectClock = true;
+        ProtectControlGroups = true;
+        ProtectHome = true;
+        ProtectHostname = true;
+        ProtectKernelLogs = true;
+        ProtectKernelModules = true;
+        ProtectKernelTunables = true;
+        ProtectSystem = "strict";
+        RemoveIPC = true;
+        # AF_UNIX is for /run/systemd/notify
+        RestrictAddressFamilies = [ "AF_UNIX" "AF_INET" "AF_INET6" ];
+        RestrictNamespaces = true;
+        RestrictRealtime = true;
+        RestrictSUIDSGID = true;
+        SystemCallFilter = [
+          "@system-service"
+          # Groups in @system-service which do not contain a syscall
+          # listed by perf stat -e 'syscalls:sys_enter_*' biboumi biboumi.cfg
+          # in tests, and seem likely not necessary for biboumi.
+          # To run such a perf in ExecStart=, you have to:
+          # - AmbientCapabilities="CAP_SYS_ADMIN"
+          # - mount -o remount,mode=755 /sys/kernel/debug/{,tracing}
+          "~@aio" "~@chown" "~@ipc" "~@keyring" "~@resources" "~@setuid" "~@timer"
+        ];
+        SystemCallArchitectures = "native";
+        SystemCallErrorNumber = "EPERM";
+      };
+    };
+  };
+
+  meta.maintainers = with maintainers; [ julm ];
+}
diff --git a/nixpkgs/nixos/modules/services/networking/bitcoind.nix b/nixpkgs/nixos/modules/services/networking/bitcoind.nix
index 4e00a8865474..bc9aa53f49aa 100644
--- a/nixpkgs/nixos/modules/services/networking/bitcoind.nix
+++ b/nixpkgs/nixos/modules/services/networking/bitcoind.nix
@@ -3,31 +3,8 @@
 with lib;
 
 let
-  cfg = config.services.bitcoind;
-  pidFile = "${cfg.dataDir}/bitcoind.pid";
-  configFile = pkgs.writeText "bitcoin.conf" ''
-    ${optionalString cfg.testnet "testnet=1"}
-    ${optionalString (cfg.dbCache != null) "dbcache=${toString cfg.dbCache}"}
-    ${optionalString (cfg.prune != null) "prune=${toString cfg.prune}"}
-
-    # Connection options
-    ${optionalString (cfg.port != null) "port=${toString cfg.port}"}
-
-    # RPC server options
-    ${optionalString (cfg.rpc.port != null) "rpcport=${toString cfg.rpc.port}"}
-    ${concatMapStringsSep  "\n"
-      (rpcUser: "rpcauth=${rpcUser.name}:${rpcUser.passwordHMAC}")
-      (attrValues cfg.rpc.users)
-    }
 
-    # Extra config options (from bitcoind nixos service)
-    ${cfg.extraConfig}
-  '';
-  cmdlineOptions = escapeShellArgs [
-    "-conf=${cfg.configFile}"
-    "-datadir=${cfg.dataDir}"
-    "-pid=${pidFile}"
-  ];
+  eachBitcoind = config.services.bitcoind;
 
   rpcUserOpts = { name, ... }: {
     options = {
@@ -39,11 +16,14 @@ let
         '';
       };
       passwordHMAC = mkOption {
-        type = with types; uniq (strMatching "[0-9a-f]+\\$[0-9a-f]{64}");
+        type = types.uniq (types.strMatching "[0-9a-f]+\\$[0-9a-f]{64}");
         example = "f7efda5c189b999524f151318c0c86$d5b51b3beffbc02b724e5d095828e0bc8b2456e9ac8757ae3211a5d9b16a22ae";
         description = ''
           Password HMAC-SHA-256 for JSON-RPC connections. Must be a string of the
           format &lt;SALT-HEX&gt;$&lt;HMAC-HEX&gt;.
+
+          Tool (Python script) for HMAC generation is available here:
+          <link xlink:href="https://github.com/bitcoin/bitcoin/blob/master/share/rpcauth/rpcauth.py"/>
         '';
       };
     };
@@ -51,10 +31,10 @@ let
       name = mkDefault name;
     };
   };
-in {
-  options = {
 
-    services.bitcoind = {
+  bitcoindOpts = { config, lib, name, ...}: {
+    options = {
+
       enable = mkEnableOption "Bitcoin daemon";
 
       package = mkOption {
@@ -63,12 +43,14 @@ in {
         defaultText = "pkgs.bitcoind";
         description = "The package providing bitcoin binaries.";
       };
+
       configFile = mkOption {
-        type = types.path;
-        default = configFile;
-        example = "/etc/bitcoind.conf";
+        type = types.nullOr types.path;
+        default = null;
+        example = "/var/lib/${name}/bitcoin.conf";
         description = "The configuration file path to supply bitcoind.";
       };
+
       extraConfig = mkOption {
         type = types.lines;
         default = "";
@@ -79,20 +61,22 @@ in {
         '';
         description = "Additional configurations to be appended to <filename>bitcoin.conf</filename>.";
       };
+
       dataDir = mkOption {
         type = types.path;
-        default = "/var/lib/bitcoind";
+        default = "/var/lib/bitcoind-${name}";
         description = "The data directory for bitcoind.";
       };
 
       user = mkOption {
         type = types.str;
-        default = "bitcoin";
+        default = "bitcoind-${name}";
         description = "The user as which to run bitcoind.";
       };
+
       group = mkOption {
         type = types.str;
-        default = cfg.user;
+        default = config.user;
         description = "The group as which to run bitcoind.";
       };
 
@@ -110,29 +94,36 @@ in {
               bob.passwordHMAC = "b2dd077cb54591a2f3139e69a897ac$4e71f08d48b4347cf8eff3815c0e25ae2e9a4340474079f55705f40574f4ec99";
             }
           '';
-          type = with types; loaOf (submodule rpcUserOpts);
-          description = ''
-            RPC user information for JSON-RPC connnections.
-          '';
+          type = types.attrsOf (types.submodule rpcUserOpts);
+          description = "RPC user information for JSON-RPC connnections.";
         };
       };
 
+      pidFile = mkOption {
+        type = types.path;
+        default = "${config.dataDir}/bitcoind.pid";
+        description = "Location of bitcoind pid file.";
+      };
+
       testnet = mkOption {
         type = types.bool;
         default = false;
-        description = "Whether to use the test chain.";
+        description = "Whether to use the testnet instead of mainnet.";
       };
+
       port = mkOption {
         type = types.nullOr types.port;
         default = null;
         description = "Override the default port on which to listen for connections.";
       };
+
       dbCache = mkOption {
         type = types.nullOr (types.ints.between 4 16384);
         default = null;
         example = 4000;
-        description = "Override the default database cache size in megabytes.";
+        description = "Override the default database cache size in MiB.";
       };
+
       prune = mkOption {
         type = types.nullOr (types.coercedTo
           (types.enum [ "disable" "manual" ])
@@ -149,45 +140,122 @@ in {
           and -rescan. Warning: Reverting this setting requires re-downloading
           the entire blockchain. ("disable" = disable pruning blocks, "manual"
           = allow manual pruning via RPC, >=550 = automatically prune block files
-          to stay under the specified target size in MiB)
+          to stay under the specified target size in MiB).
+        '';
+      };
+
+      extraCmdlineOptions = mkOption {
+        type = types.listOf types.str;
+        default = [];
+        description = ''
+          Extra command line options to pass to bitcoind.
+          Run bitcoind --help to list all available options.
         '';
       };
     };
   };
+in
+{
 
-  config = mkIf cfg.enable {
-    environment.systemPackages = [ cfg.package ];
-    systemd.tmpfiles.rules = [
-      "d '${cfg.dataDir}' 0770 '${cfg.user}' '${cfg.group}' - -"
-      "L '${cfg.dataDir}/bitcoin.conf' - - - - '${cfg.configFile}'"
-    ];
-    systemd.services.bitcoind = {
-      description = "Bitcoin daemon";
-      after = [ "network.target" ];
-      wantedBy = [ "multi-user.target" ];
-      serviceConfig = {
-        User = cfg.user;
-        Group = cfg.group;
-        ExecStart = "${cfg.package}/bin/bitcoind ${cmdlineOptions}";
-        Restart = "on-failure";
-
-        # Hardening measures
-        PrivateTmp = "true";
-        ProtectSystem = "full";
-        NoNewPrivileges = "true";
-        PrivateDevices = "true";
-        MemoryDenyWriteExecute = "true";
-      };
+  options = {
+    services.bitcoind = mkOption {
+      type = types.attrsOf (types.submodule bitcoindOpts);
+      default = {};
+      description = "Specification of one or more bitcoind instances.";
     };
-    users.users.${cfg.user} = {
+  };
+
+  config = mkIf (eachBitcoind != {}) {
+
+    assertions = flatten (mapAttrsToList (bitcoindName: cfg: [
+    {
+      assertion = (cfg.prune != null) -> (builtins.elem cfg.prune [ "disable" "manual" 0 1 ] || (builtins.isInt cfg.prune && cfg.prune >= 550));
+      message = ''
+        If set, services.bitcoind.${bitcoindName}.prune has to be "disable", "manual", 0 , 1 or >= 550.
+      '';
+    }
+    {
+      assertion = (cfg.rpc.users != {}) -> (cfg.configFile == null);
+      message = ''
+        You cannot set both services.bitcoind.${bitcoindName}.rpc.users and services.bitcoind.${bitcoindName}.configFile
+        as they are exclusive. RPC user setting would have no effect if custom configFile would be used.
+      '';
+    }
+    ]) eachBitcoind);
+
+    environment.systemPackages = flatten (mapAttrsToList (bitcoindName: cfg: [
+      cfg.package
+    ]) eachBitcoind);
+
+    systemd.services = mapAttrs' (bitcoindName: cfg: (
+      nameValuePair "bitcoind-${bitcoindName}" (
+      let
+        configFile = pkgs.writeText "bitcoin.conf" ''
+          # If Testnet is enabled, we need to add [test] section
+          # otherwise, some options (e.g.: custom RPC port) will not work
+          ${optionalString cfg.testnet "[test]"}
+          # RPC users
+          ${concatMapStringsSep  "\n"
+            (rpcUser: "rpcauth=${rpcUser.name}:${rpcUser.passwordHMAC}")
+            (attrValues cfg.rpc.users)
+          }
+          # Extra config options (from bitcoind nixos service)
+          ${cfg.extraConfig}
+        '';
+      in {
+        description = "Bitcoin daemon";
+        after = [ "network.target" ];
+        wantedBy = [ "multi-user.target" ];
+        serviceConfig = {
+          User = cfg.user;
+          Group = cfg.group;
+          ExecStart = ''
+            ${cfg.package}/bin/bitcoind \
+            ${if (cfg.configFile != null) then
+              "-conf=${cfg.configFile}"
+            else
+              "-conf=${configFile}"
+            } \
+            -datadir=${cfg.dataDir} \
+            -pid=${cfg.pidFile} \
+            ${optionalString cfg.testnet "-testnet"}\
+            ${optionalString (cfg.port != null) "-port=${toString cfg.port}"}\
+            ${optionalString (cfg.prune != null) "-prune=${toString cfg.prune}"}\
+            ${optionalString (cfg.dbCache != null) "-dbcache=${toString cfg.dbCache}"}\
+            ${optionalString (cfg.rpc.port != null) "-rpcport=${toString cfg.rpc.port}"}\
+            ${toString cfg.extraCmdlineOptions}
+          '';
+          Restart = "on-failure";
+
+          # Hardening measures
+          PrivateTmp = "true";
+          ProtectSystem = "full";
+          NoNewPrivileges = "true";
+          PrivateDevices = "true";
+          MemoryDenyWriteExecute = "true";
+        };
+      }
+    ))) eachBitcoind;
+
+    systemd.tmpfiles.rules = flatten (mapAttrsToList (bitcoindName: cfg: [
+      "d '${cfg.dataDir}' 0770 '${cfg.user}' '${cfg.group}' - -"
+    ]) eachBitcoind);
+
+    users.users = mapAttrs' (bitcoindName: cfg: (
+      nameValuePair "bitcoind-${bitcoindName}" {
       name = cfg.user;
       group = cfg.group;
       description = "Bitcoin daemon user";
       home = cfg.dataDir;
       isSystemUser = true;
-    };
-    users.groups.${cfg.group} = {
-      name = cfg.group;
-    };
+    })) eachBitcoind;
+
+    users.groups = mapAttrs' (bitcoindName: cfg: (
+      nameValuePair "${cfg.group}" { }
+    )) eachBitcoind;
+
   };
+
+  meta.maintainers = with maintainers; [ _1000101 ];
+
 }
diff --git a/nixpkgs/nixos/modules/services/networking/blockbook-frontend.nix b/nixpkgs/nixos/modules/services/networking/blockbook-frontend.nix
new file mode 100644
index 000000000000..dde24522756a
--- /dev/null
+++ b/nixpkgs/nixos/modules/services/networking/blockbook-frontend.nix
@@ -0,0 +1,275 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+
+  eachBlockbook = config.services.blockbook-frontend;
+
+  blockbookOpts = { config, lib, name, ...}: {
+
+    options = {
+
+      enable = mkEnableOption "blockbook-frontend application.";
+
+      package = mkOption {
+        type = types.package;
+        default = pkgs.blockbook;
+        description = "Which blockbook package to use.";
+      };
+
+      user = mkOption {
+        type = types.str;
+        default = "blockbook-frontend-${name}";
+        description = "The user as which to run blockbook-frontend-${name}.";
+      };
+
+      group = mkOption {
+        type = types.str;
+        default = "${config.user}";
+        description = "The group as which to run blockbook-frontend-${name}.";
+      };
+
+      certFile = mkOption {
+        type = types.nullOr types.path;
+        default = null;
+        example = "/etc/secrets/blockbook-frontend-${name}/certFile";
+        description = ''
+          To enable SSL, specify path to the name of certificate files without extension.
+          Expecting <filename>certFile.crt</filename> and <filename>certFile.key</filename>.
+        '';
+      };
+
+      configFile = mkOption {
+        type = with types; nullOr path;
+        default = null;
+        example = "${config.dataDir}/config.json";
+        description = "Location of the blockbook configuration file.";
+      };
+
+      coinName = mkOption {
+        type = types.str;
+        default = "Bitcoin";
+        example = "Bitcoin";
+        description = ''
+          See <link xlink:href="https://github.com/trezor/blockbook/blob/master/bchain/coins/blockchain.go#L61"/>
+          for current of coins supported in master (Note: may differ from release).
+        '';
+      };
+
+      cssDir = mkOption {
+        type = types.path;
+        default = "${config.package}/share/css/";
+        example = "${config.dataDir}/static/css/";
+        description = ''
+          Location of the dir with <filename>main.css</filename> CSS file.
+          By default, the one shipped with the package is used.
+        '';
+      };
+
+      dataDir = mkOption {
+        type = types.path;
+        default = "/var/lib/blockbook-frontend-${name}";
+        description = "Location of blockbook-frontend-${name} data directory.";
+      };
+
+      debug = mkOption {
+        type = types.bool;
+        default = false;
+        description = "Debug mode, return more verbose errors, reload templates on each request.";
+      };
+
+      internal = mkOption {
+        type = types.nullOr types.str;
+        default = ":9030";
+        example = ":9030";
+        description = "Internal http server binding <literal>[address]:port</literal>.";
+      };
+
+      messageQueueBinding = mkOption {
+        type = types.str;
+        default = "tcp://127.0.0.1:38330";
+        example = "tcp://127.0.0.1:38330";
+        description = "Message Queue Binding <literal>address:port</literal>.";
+      };
+
+      public = mkOption {
+        type = types.nullOr types.str;
+        default = ":9130";
+        example = ":9130";
+        description = "Public http server binding <literal>[address]:port</literal>.";
+      };
+
+      rpc = {
+        url = mkOption {
+          type = types.str;
+          default = "http://127.0.0.1";
+          description = "URL for JSON-RPC connections.";
+        };
+
+        port = mkOption {
+          type = types.port;
+          default = 8030;
+          description = "Port for JSON-RPC connections.";
+        };
+
+        user = mkOption {
+          type = types.str;
+          default = "rpc";
+          example = "rpc";
+          description = "Username for JSON-RPC connections.";
+        };
+
+        password = mkOption {
+          type = types.str;
+          default = "rpc";
+          example = "rpc";
+          description = ''
+            RPC password for JSON-RPC connections.
+            Warning: this is stored in cleartext in the Nix store!!!
+            Use <literal>configFile</literal> or <literal>passwordFile</literal> if needed.
+          '';
+        };
+
+        passwordFile = mkOption {
+          type = types.nullOr types.path;
+          default = null;
+          description = ''
+            File containing password of the RPC user.
+            Note: This options is ignored when <literal>configFile</literal> is used.
+          '';
+        };
+      };
+
+      sync = mkOption {
+        type = types.bool;
+        default = true;
+        description = "Synchronizes until tip, if together with zeromq, keeps index synchronized.";
+      };
+
+      templateDir = mkOption {
+        type = types.path;
+        default = "${config.package}/share/templates/";
+        example = "${config.dataDir}/templates/static/";
+        description = "Location of the HTML templates. By default, ones shipped with the package are used.";
+      };
+
+      extraConfig = mkOption {
+        type = types.attrs;
+        default = {};
+        example = literalExample '' {
+          alternative_estimate_fee = "whatthefee-disabled";
+          alternative_estimate_fee_params = "{\"url\": \"https://whatthefee.io/data.json\", \"periodSeconds\": 60}";
+          fiat_rates = "coingecko";
+          fiat_rates_params = "{\"url\": \"https://api.coingecko.com/api/v3\", \"coin\": \"bitcoin\", \"periodSeconds\": 60}";
+          coin_shortcut = "BTC";
+          coin_label = "Bitcoin";
+          xpub_magic = 76067358;
+          xpub_magic_segwit_p2sh = 77429938;
+          xpub_magic_segwit_native = 78792518;
+        }'';
+        description = ''
+          Additional configurations to be appended to <filename>coin.conf</filename>.
+          Overrides any already defined configuration options.
+          See <link xlink:href="https://github.com/trezor/blockbook/tree/master/configs/coins"/>
+          for current configuration options supported in master (Note: may differ from release).
+        '';
+      };
+
+      extraCmdLineOptions = mkOption {
+        type = types.listOf types.str;
+        default = [];
+        example = [ "-workers=1" "-dbcache=0" "-logtosderr" ];
+        description = ''
+          Extra command line options to pass to Blockbook.
+          Run blockbook --help to list all available options.
+        '';
+      };
+    };
+  };
+in
+{
+  # interface
+
+  options = {
+    services.blockbook-frontend = mkOption {
+      type = types.attrsOf (types.submodule blockbookOpts);
+      default = {};
+      description = "Specification of one or more blockbook-frontend instances.";
+    };
+  };
+
+  # implementation
+
+  config = mkIf (eachBlockbook != {}) {
+
+    systemd.services = mapAttrs' (blockbookName: cfg: (
+      nameValuePair "blockbook-frontend-${blockbookName}" (
+        let
+          configFile = if cfg.configFile != null then cfg.configFile else
+            pkgs.writeText "config.conf" (builtins.toJSON ( {
+                coin_name = "${cfg.coinName}";
+                rpc_user = "${cfg.rpc.user}";
+                rpc_pass = "${cfg.rpc.password}";
+                rpc_url = "${cfg.rpc.url}:${toString cfg.rpc.port}";
+                message_queue_binding = "${cfg.messageQueueBinding}";
+              } // cfg.extraConfig)
+            );
+        in {
+          description = "blockbook-frontend-${blockbookName} daemon";
+          after = [ "network.target" ];
+          wantedBy = [ "multi-user.target" ];
+          preStart = ''
+            ln -sf ${cfg.templateDir} ${cfg.dataDir}/static/
+            ln -sf ${cfg.cssDir} ${cfg.dataDir}/static/
+            ${optionalString (cfg.rpc.passwordFile != null && cfg.configFile == null) ''
+              CONFIGTMP=$(mktemp)
+              ${pkgs.jq}/bin/jq ".rpc_pass = \"$(cat ${cfg.rpc.passwordFile})\"" ${configFile} > $CONFIGTMP
+              mv $CONFIGTMP ${cfg.dataDir}/${blockbookName}-config.json
+            ''}
+          '';
+          serviceConfig = {
+            User = cfg.user;
+            Group = cfg.group;
+            ExecStart = ''
+               ${cfg.package}/bin/blockbook \
+               ${if (cfg.rpc.passwordFile != null && cfg.configFile == null) then
+               "-blockchaincfg=${cfg.dataDir}/${blockbookName}-config.json"
+               else
+               "-blockchaincfg=${configFile}"
+               } \
+               -datadir=${cfg.dataDir} \
+               ${optionalString (cfg.sync != false) "-sync"} \
+               ${optionalString (cfg.certFile != null) "-certfile=${toString cfg.certFile}"} \
+               ${optionalString (cfg.debug != false) "-debug"} \
+               ${optionalString (cfg.internal != null) "-internal=${toString cfg.internal}"} \
+               ${optionalString (cfg.public != null) "-public=${toString cfg.public}"} \
+               ${toString cfg.extraCmdLineOptions}
+            '';
+            Restart = "on-failure";
+            WorkingDirectory = cfg.dataDir;
+            LimitNOFILE = 65536;
+          };
+        }
+    ) )) eachBlockbook;
+
+    systemd.tmpfiles.rules = flatten (mapAttrsToList (blockbookName: cfg: [
+      "d ${cfg.dataDir} 0750 ${cfg.user} ${cfg.group} - -"
+      "d ${cfg.dataDir}/static 0750 ${cfg.user} ${cfg.group} - -"
+    ]) eachBlockbook);
+
+    users.users = mapAttrs' (blockbookName: cfg: (
+      nameValuePair "blockbook-frontend-${blockbookName}" {
+      name = cfg.user;
+      group = cfg.group;
+      home = cfg.dataDir;
+      isSystemUser = true;
+    })) eachBlockbook;
+
+    users.groups = mapAttrs' (instanceName: cfg: (
+      nameValuePair "${cfg.group}" { })) eachBlockbook;
+  };
+
+  meta.maintainers = with maintainers; [ _1000101 ];
+
+}
diff --git a/nixpkgs/nixos/modules/services/networking/corerad.nix b/nixpkgs/nixos/modules/services/networking/corerad.nix
index 5d73c0a0d779..d90a5923bc62 100644
--- a/nixpkgs/nixos/modules/services/networking/corerad.nix
+++ b/nixpkgs/nixos/modules/services/networking/corerad.nix
@@ -77,8 +77,11 @@ in {
         AmbientCapabilities = "CAP_NET_ADMIN CAP_NET_RAW";
         NoNewPrivileges = true;
         DynamicUser = true;
+        Type = "notify";
+        NotifyAccess = "main";
         ExecStart = "${getBin cfg.package}/bin/corerad -c=${cfg.configFile}";
         Restart = "on-failure";
+        RestartKillSignal = "SIGHUP";
       };
     };
   };
diff --git a/nixpkgs/nixos/modules/services/networking/dhcpd.nix b/nixpkgs/nixos/modules/services/networking/dhcpd.nix
index 67f7d8118870..8966deac76cb 100644
--- a/nixpkgs/nixos/modules/services/networking/dhcpd.nix
+++ b/nixpkgs/nixos/modules/services/networking/dhcpd.nix
@@ -11,7 +11,7 @@ let
     ''
       default-lease-time 600;
       max-lease-time 7200;
-      authoritative;
+      ${optionalString (!cfg.authoritative) "not "}authoritative;
       ddns-update-style interim;
       log-facility local1; # see dhcpd.nix
 
@@ -176,6 +176,16 @@ let
       '';
     };
 
+    authoritative = mkOption {
+      type = types.bool;
+      default = true;
+      description = ''
+        Whether the DHCP server shall send DHCPNAK messages to misconfigured
+        clients. If this is not done, clients may be unable to get a correct
+        IP address after changing subnets until their old lease has expired.
+      '';
+    };
+
   };
 
 in
diff --git a/nixpkgs/nixos/modules/services/networking/gateone.nix b/nixpkgs/nixos/modules/services/networking/gateone.nix
index 4456a95402ed..56f2ba21a125 100644
--- a/nixpkgs/nixos/modules/services/networking/gateone.nix
+++ b/nixpkgs/nixos/modules/services/networking/gateone.nix
@@ -56,4 +56,4 @@ config = mkIf cfg.enable {
   };
 };
 }
-  
+
diff --git a/nixpkgs/nixos/modules/services/networking/heyefi.nix b/nixpkgs/nixos/modules/services/networking/heyefi.nix
deleted file mode 100644
index fc2b5a848578..000000000000
--- a/nixpkgs/nixos/modules/services/networking/heyefi.nix
+++ /dev/null
@@ -1,82 +0,0 @@
-{ config, lib, pkgs, ... }:
-
-with lib;
-
-let
-
-  cfg = config.services.heyefi;
-in
-
-{
-
-  ###### interface
-
-  options = {
-
-    services.heyefi = {
-
-      enable = mkEnableOption "heyefi";
-
-      cardMacaddress = mkOption {
-        default = "";
-        description = ''
-          An Eye-Fi card MAC address.
-          '';
-      };
-
-      uploadKey = mkOption {
-        default = "";
-        description = ''
-          An Eye-Fi card's upload key.
-          '';
-      };
-
-      uploadDir = mkOption {
-        example = "/home/username/pictures";
-        description = ''
-          The directory to upload the files to.
-          '';
-      };
-
-      user = mkOption {
-        default = "root";
-        description = ''
-          heyefi will be run under this user (user must exist,
-          this can be your user name).
-        '';
-      };
-
-    };
-
-  };
-
-
-  ###### implementation
-
-  config = mkIf cfg.enable {
-
-    systemd.services.heyefi =
-      {
-        description = "heyefi service";
-        after = [ "network.target" ];
-        wantedBy = [ "multi-user.target" ];
-        serviceConfig = {
-          User = "${cfg.user}";
-          Restart = "always";
-          ExecStart = "${pkgs.heyefi}/bin/heyefi";
-        };
-
-      };
-
-    environment.etc."heyefi/heyefi.config".text =
-      ''
-        # /etc/heyefi/heyefi.conf: DO NOT EDIT -- this file has been generated automatically.
-        cards = [["${config.services.heyefi.cardMacaddress}","${config.services.heyefi.uploadKey}"]]
-        upload_dir = "${toString config.services.heyefi.uploadDir}"
-      '';
-
-    environment.systemPackages = [ pkgs.heyefi ];
-
-  };
-
-}
diff --git a/nixpkgs/nixos/modules/services/networking/hylafax/options.nix b/nixpkgs/nixos/modules/services/networking/hylafax/options.nix
index 4ac6d3fa8432..9e28d09dffca 100644
--- a/nixpkgs/nixos/modules/services/networking/hylafax/options.nix
+++ b/nixpkgs/nixos/modules/services/networking/hylafax/options.nix
@@ -3,7 +3,7 @@
 let
 
   inherit (lib.options) literalExample mkEnableOption mkOption;
-  inherit (lib.types) bool enum int lines loaOf nullOr path str submodule;
+  inherit (lib.types) bool enum int lines attrsOf nullOr path str submodule;
   inherit (lib.modules) mkDefault mkIf mkMerge;
 
   commonDescr = ''
@@ -248,7 +248,7 @@ in
     };
 
     modems = mkOption {
-      type = loaOf (submodule [ modemConfigOptions ]);
+      type = attrsOf (submodule [ modemConfigOptions ]);
       default = {};
       example.ttyS1 = {
         type = "cirrus";
diff --git a/nixpkgs/nixos/modules/services/networking/jicofo.nix b/nixpkgs/nixos/modules/services/networking/jicofo.nix
new file mode 100644
index 000000000000..160a5fea91a0
--- /dev/null
+++ b/nixpkgs/nixos/modules/services/networking/jicofo.nix
@@ -0,0 +1,152 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.services.jicofo;
+in
+{
+  options.services.jicofo = with types; {
+    enable = mkEnableOption "Jitsi Conference Focus - component of Jitsi Meet";
+
+    xmppHost = mkOption {
+      type = str;
+      example = "localhost";
+      description = ''
+        Hostname of the XMPP server to connect to.
+      '';
+    };
+
+    xmppDomain = mkOption {
+      type = nullOr str;
+      example = "meet.example.org";
+      description = ''
+        Domain name of the XMMP server to which to connect as a component.
+
+        If null, <option>xmppHost</option> is used.
+      '';
+    };
+
+    componentPasswordFile = mkOption {
+      type = str;
+      example = "/run/keys/jicofo-component";
+      description = ''
+        Path to file containing component secret.
+      '';
+    };
+
+    userName = mkOption {
+      type = str;
+      default = "focus";
+      description = ''
+        User part of the JID for XMPP user connection.
+      '';
+    };
+
+    userDomain = mkOption {
+      type = str;
+      example = "auth.meet.example.org";
+      description = ''
+        Domain part of the JID for XMPP user connection.
+      '';
+    };
+
+    userPasswordFile = mkOption {
+      type = str;
+      example = "/run/keys/jicofo-user";
+      description = ''
+        Path to file containing password for XMPP user connection.
+      '';
+    };
+
+    bridgeMuc = mkOption {
+      type = str;
+      example = "jvbbrewery@internal.meet.example.org";
+      description = ''
+        JID of the internal MUC used to communicate with Videobridges.
+      '';
+    };
+
+    config = mkOption {
+      type = attrsOf str;
+      default = { };
+      example = literalExample ''
+        {
+          "org.jitsi.jicofo.auth.URL" = "XMPP:jitsi-meet.example.com";
+        }
+      '';
+      description = ''
+        Contents of the <filename>sip-communicator.properties</filename> configuration file for jicofo.
+      '';
+    };
+  };
+
+  config = mkIf cfg.enable {
+    services.jicofo.config = mapAttrs (_: v: mkDefault v) {
+      "org.jitsi.jicofo.BRIDGE_MUC" = cfg.bridgeMuc;
+    };
+
+    users.groups.jitsi-meet = {};
+
+    systemd.services.jicofo = let
+      jicofoProps = {
+        "-Dnet.java.sip.communicator.SC_HOME_DIR_LOCATION" = "/etc/jitsi";
+        "-Dnet.java.sip.communicator.SC_HOME_DIR_NAME" = "jicofo";
+        "-Djava.util.logging.config.file" = "/etc/jitsi/jicofo/logging.properties";
+      };
+    in
+    {
+      description = "JItsi COnference FOcus";
+      wantedBy = [ "multi-user.target" ];
+      after = [ "network.target" ];
+
+      restartTriggers = [
+        config.environment.etc."jitsi/jicofo/sip-communicator.properties".source
+      ];
+      environment.JAVA_SYS_PROPS = concatStringsSep " " (mapAttrsToList (k: v: "${k}=${toString v}") jicofoProps);
+
+      script = ''
+        ${pkgs.jicofo}/bin/jicofo \
+          --host=${cfg.xmppHost} \
+          --domain=${if cfg.xmppDomain == null then cfg.xmppHost else cfg.xmppDomain} \
+          --secret=$(cat ${cfg.componentPasswordFile}) \
+          --user_name=${cfg.userName} \
+          --user_domain=${cfg.userDomain} \
+          --user_password=$(cat ${cfg.userPasswordFile})
+      '';
+
+      serviceConfig = {
+        Type = "exec";
+
+        DynamicUser = true;
+        User = "jicofo";
+        Group = "jitsi-meet";
+
+        CapabilityBoundingSet = "";
+        NoNewPrivileges = true;
+        ProtectSystem = "strict";
+        ProtectHome = true;
+        PrivateTmp = true;
+        PrivateDevices = true;
+        ProtectHostname = true;
+        ProtectKernelTunables = true;
+        ProtectKernelModules = true;
+        ProtectControlGroups = true;
+        RestrictAddressFamilies = [ "AF_INET" "AF_INET6" "AF_UNIX" ];
+        RestrictNamespaces = true;
+        LockPersonality = true;
+        RestrictRealtime = true;
+        RestrictSUIDSGID = true;
+      };
+    };
+
+    environment.etc."jitsi/jicofo/sip-communicator.properties".source =
+      pkgs.writeText "sip-communicator.properties" (
+        generators.toKeyValue {} cfg.config
+      );
+    environment.etc."jitsi/jicofo/logging.properties".source =
+      mkDefault "${pkgs.jicofo}/etc/jitsi/jicofo/logging.properties-journal";
+  };
+
+  meta.maintainers = lib.teams.jitsi.members;
+}
diff --git a/nixpkgs/nixos/modules/services/networking/jitsi-videobridge.nix b/nixpkgs/nixos/modules/services/networking/jitsi-videobridge.nix
new file mode 100644
index 000000000000..5482e997a401
--- /dev/null
+++ b/nixpkgs/nixos/modules/services/networking/jitsi-videobridge.nix
@@ -0,0 +1,276 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.services.jitsi-videobridge;
+  attrsToArgs = a: concatStringsSep " " (mapAttrsToList (k: v: "${k}=${toString v}") a);
+
+  # HOCON is a JSON superset that videobridge2 uses for configuration.
+  # It can substitute environment variables which we use for passwords here.
+  # https://github.com/lightbend/config/blob/master/README.md
+  #
+  # Substitution for environment variable FOO is represented as attribute set
+  # { __hocon_envvar = "FOO"; }
+  toHOCON = x: if isAttrs x && x ? __hocon_envvar then ("\${" + x.__hocon_envvar + "}")
+    else if isAttrs x then "{${ concatStringsSep "," (mapAttrsToList (k: v: ''"${k}":${toHOCON v}'') x) }}"
+    else if isList x then "[${ concatMapStringsSep "," toHOCON x }]"
+    else builtins.toJSON x;
+
+  # We're passing passwords in environment variables that have names generated
+  # from an attribute name, which may not be a valid bash identifier.
+  toVarName = s: "XMPP_PASSWORD_" + stringAsChars (c: if builtins.match "[A-Za-z0-9]" c != null then c else "_") s;
+
+  defaultJvbConfig = {
+    videobridge = {
+      ice = {
+        tcp = {
+          enabled = true;
+          port = 4443;
+        };
+        udp.port = 10000;
+      };
+      stats = {
+        enabled = true;
+        transports = [ { type = "muc"; } ];
+      };
+      apis.xmpp-client.configs = flip mapAttrs cfg.xmppConfigs (name: xmppConfig: {
+        hostname = xmppConfig.hostName;
+        domain = xmppConfig.domain;
+        username = xmppConfig.userName;
+        password = { __hocon_envvar = toVarName name; };
+        muc_jids = xmppConfig.mucJids;
+        muc_nickname = xmppConfig.mucNickname;
+        disable_certificate_verification = xmppConfig.disableCertificateVerification;
+      });
+    };
+  };
+
+  # Allow overriding leaves of the default config despite types.attrs not doing any merging.
+  jvbConfig = recursiveUpdate defaultJvbConfig cfg.config;
+in
+{
+  options.services.jitsi-videobridge = with types; {
+    enable = mkEnableOption "Jitsi Videobridge, a WebRTC compatible video router";
+
+    config = mkOption {
+      type = attrs;
+      default = { };
+      example = literalExample ''
+        {
+          videobridge = {
+            ice.udp.port = 5000;
+            websockets = {
+              enabled = true;
+              server-id = "jvb1";
+            };
+          };
+        }
+      '';
+      description = ''
+        Videobridge configuration.
+
+        See <link xlink:href="https://github.com/jitsi/jitsi-videobridge/blob/master/src/main/resources/reference.conf" />
+        for default configuration with comments.
+      '';
+    };
+
+    xmppConfigs = mkOption {
+      description = ''
+        XMPP servers to connect to.
+
+        See <link xlink:href="https://github.com/jitsi/jitsi-videobridge/blob/master/doc/muc.md" /> for more information.
+      '';
+      default = { };
+      example = literalExample ''
+        {
+          "localhost" = {
+            hostName = "localhost";
+            userName = "jvb";
+            domain = "auth.xmpp.example.org";
+            passwordFile = "/var/lib/jitsi-meet/videobridge-secret";
+            mucJids = "jvbbrewery@internal.xmpp.example.org";
+          };
+        }
+      '';
+      type = attrsOf (submodule ({ name, ... }: {
+        options = {
+          hostName = mkOption {
+            type = str;
+            example = "xmpp.example.org";
+            description = ''
+              Hostname of the XMPP server to connect to. Name of the attribute set is used by default.
+            '';
+          };
+          domain = mkOption {
+            type = nullOr str;
+            default = null;
+            example = "auth.xmpp.example.org";
+            description = ''
+              Domain part of JID of the XMPP user, if it is different from hostName.
+            '';
+          };
+          userName = mkOption {
+            type = str;
+            default = "jvb";
+            description = ''
+              User part of the JID.
+            '';
+          };
+          passwordFile = mkOption {
+            type = str;
+            example = "/run/keys/jitsi-videobridge-xmpp1";
+            description = ''
+              File containing the password for the user.
+            '';
+          };
+          mucJids = mkOption {
+            type = str;
+            example = "jvbbrewery@internal.xmpp.example.org";
+            description = ''
+              JID of the MUC to join. JiCoFo needs to be configured to join the same MUC.
+            '';
+          };
+          mucNickname = mkOption {
+            # Upstream DEBs use UUID, let's use hostname instead.
+            type = str;
+            description = ''
+              Videobridges use the same XMPP account and need to be distinguished by the
+              nickname (aka resource part of the JID). By default, system hostname is used.
+            '';
+          };
+          disableCertificateVerification = mkOption {
+            type = bool;
+            default = false;
+            description = ''
+              Whether to skip validation of the server's certificate.
+            '';
+          };
+        };
+        config = {
+          hostName = mkDefault name;
+          mucNickname = mkDefault (builtins.replaceStrings [ "." ] [ "-" ] (
+            config.networking.hostName + optionalString (config.networking.domain != null) ".${config.networking.domain}"
+          ));
+        };
+      }));
+    };
+
+    nat = {
+      localAddress = mkOption {
+        type = nullOr str;
+        default = null;
+        example = "192.168.1.42";
+        description = ''
+          Local address when running behind NAT.
+        '';
+      };
+
+      publicAddress = mkOption {
+        type = nullOr str;
+        default = null;
+        example = "1.2.3.4";
+        description = ''
+          Public address when running behind NAT.
+        '';
+      };
+    };
+
+    extraProperties = mkOption {
+      type = attrsOf str;
+      default = { };
+      description = ''
+        Additional Java properties passed to jitsi-videobridge.
+      '';
+    };
+
+    openFirewall = mkOption {
+      type = bool;
+      default = false;
+      description = ''
+        Whether to open ports in the firewall for the videobridge.
+      '';
+    };
+  };
+
+  config = mkIf cfg.enable {
+    users.groups.jitsi-meet = {};
+
+    services.jitsi-videobridge.extraProperties = optionalAttrs (cfg.nat.localAddress != null) {
+      "org.ice4j.ice.harvest.NAT_HARVESTER_LOCAL_ADDRESS" = cfg.nat.localAddress;
+      "org.ice4j.ice.harvest.NAT_HARVESTER_PUBLIC_ADDRESS" = cfg.nat.publicAddress;
+    };
+
+    systemd.services.jitsi-videobridge2 = let
+      jvbProps = {
+        "-Dnet.java.sip.communicator.SC_HOME_DIR_LOCATION" = "/etc/jitsi";
+        "-Dnet.java.sip.communicator.SC_HOME_DIR_NAME" = "videobridge";
+        "-Djava.util.logging.config.file" = "/etc/jitsi/videobridge/logging.properties";
+        "-Dconfig.file" = pkgs.writeText "jvb.conf" (toHOCON jvbConfig);
+      } // (mapAttrs' (k: v: nameValuePair "-D${k}" v) cfg.extraProperties);
+    in
+    {
+      aliases = [ "jitsi-videobridge.service" ];
+      description = "Jitsi Videobridge";
+      after = [ "network.target" ];
+      wantedBy = [ "multi-user.target" ];
+
+      environment.JAVA_SYS_PROPS = attrsToArgs jvbProps;
+
+      script = (concatStrings (mapAttrsToList (name: xmppConfig:
+        "export ${toVarName name}=$(cat ${xmppConfig.passwordFile})\n"
+      ) cfg.xmppConfigs))
+      + ''
+        ${pkgs.jitsi-videobridge}/bin/jitsi-videobridge --apis=none
+      '';
+
+      serviceConfig = {
+        Type = "exec";
+
+        DynamicUser = true;
+        User = "jitsi-videobridge";
+        Group = "jitsi-meet";
+
+        CapabilityBoundingSet = "";
+        NoNewPrivileges = true;
+        ProtectSystem = "strict";
+        ProtectHome = true;
+        PrivateTmp = true;
+        PrivateDevices = true;
+        ProtectHostname = true;
+        ProtectKernelTunables = true;
+        ProtectKernelModules = true;
+        ProtectControlGroups = true;
+        RestrictAddressFamilies = [ "AF_INET" "AF_INET6" "AF_UNIX" ];
+        RestrictNamespaces = true;
+        LockPersonality = true;
+        RestrictRealtime = true;
+        RestrictSUIDSGID = true;
+
+        TasksMax = 65000;
+        LimitNPROC = 65000;
+        LimitNOFILE = 65000;
+      };
+    };
+
+    environment.etc."jitsi/videobridge/logging.properties".source =
+      mkDefault "${pkgs.jitsi-videobridge}/etc/jitsi/videobridge/logging.properties-journal";
+
+    # (from videobridge2 .deb)
+    # this sets the max, so that we can bump the JVB UDP single port buffer size.
+    boot.kernel.sysctl."net.core.rmem_max" = mkDefault 10485760;
+    boot.kernel.sysctl."net.core.netdev_max_backlog" = mkDefault 100000;
+
+    networking.firewall.allowedTCPPorts = mkIf cfg.openFirewall
+      [ jvbConfig.videobridge.ice.tcp.port ];
+    networking.firewall.allowedUDPPorts = mkIf cfg.openFirewall
+      [ jvbConfig.videobridge.ice.udp.port ];
+
+    assertions = [{
+      message = "publicAddress must be set if and only if localAddress is set";
+      assertion = (cfg.nat.publicAddress == null) == (cfg.nat.localAddress == null);
+    }];
+  };
+
+  meta.maintainers = lib.teams.jitsi.members;
+}
diff --git a/nixpkgs/nixos/modules/services/networking/kresd.nix b/nixpkgs/nixos/modules/services/networking/kresd.nix
index c5a84eebd46f..ccb34163d5f3 100644
--- a/nixpkgs/nixos/modules/services/networking/kresd.nix
+++ b/nixpkgs/nixos/modules/services/networking/kresd.nix
@@ -129,14 +129,17 @@ in {
     systemd.services."kresd@".serviceConfig = {
       ExecStart = "${package}/bin/kresd --noninteractive "
         + "-c ${package}/lib/knot-resolver/distro-preconfig.lua -c ${configFile}";
-      # Ensure correct ownership in case UID or GID changes.
+      # Ensure /run/knot-resolver exists
+      RuntimeDirectory = "knot-resolver";
+      RuntimeDirectoryMode = "0770";
+      # Ensure /var/lib/knot-resolver exists
+      StateDirectory = "knot-resolver";
+      StateDirectoryMode = "0770";
+      # Ensure /var/cache/knot-resolver exists
       CacheDirectory = "knot-resolver";
-      CacheDirectoryMode = "0750";
+      CacheDirectoryMode = "0770";
     };
 
-    environment.etc."tmpfiles.d/knot-resolver.conf".source =
-      "${package}/lib/tmpfiles.d/knot-resolver.conf";
-
     # Try cleaning up the previously default location of cache file.
     # Note that /var/cache/* should always be safe to remove.
     # TODO: remove later, probably between 20.09 and 21.03
diff --git a/nixpkgs/nixos/modules/services/networking/monero.nix b/nixpkgs/nixos/modules/services/networking/monero.nix
index 97af29978397..fde3293fc131 100644
--- a/nixpkgs/nixos/modules/services/networking/monero.nix
+++ b/nixpkgs/nixos/modules/services/networking/monero.nix
@@ -87,7 +87,7 @@ in
       };
 
       rpc.password = mkOption {
-        type = types.str;
+        type = types.nullOr types.str;
         default = null;
         description = ''
           Password for RPC connections.
diff --git a/nixpkgs/nixos/modules/services/networking/mstpd.nix b/nixpkgs/nixos/modules/services/networking/mstpd.nix
index 5d1fc4a65427..bd71010ce549 100644
--- a/nixpkgs/nixos/modules/services/networking/mstpd.nix
+++ b/nixpkgs/nixos/modules/services/networking/mstpd.nix
@@ -5,7 +5,7 @@ in
 with lib;
 {
   options.services.mstpd = {
-    
+
     enable = mkOption {
       default = false;
       type = types.bool;
diff --git a/nixpkgs/nixos/modules/services/networking/namecoind.nix b/nixpkgs/nixos/modules/services/networking/namecoind.nix
index 6ca99e1321bd..16f85df2e77c 100644
--- a/nixpkgs/nixos/modules/services/networking/namecoind.nix
+++ b/nixpkgs/nixos/modules/services/networking/namecoind.nix
@@ -89,7 +89,7 @@ in
       };
 
       rpc.password = mkOption {
-        type = types.str;
+        type = types.nullOr types.str;
         default = null;
         description = ''
           Password for RPC connections.
diff --git a/nixpkgs/nixos/modules/services/networking/ncdns.nix b/nixpkgs/nixos/modules/services/networking/ncdns.nix
new file mode 100644
index 000000000000..c1832ad17520
--- /dev/null
+++ b/nixpkgs/nixos/modules/services/networking/ncdns.nix
@@ -0,0 +1,278 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfgs = config.services;
+  cfg  = cfgs.ncdns;
+
+  dataDir  = "/var/lib/ncdns";
+  username = "ncdns";
+
+  valueType = with types; oneOf [ int str bool path ]
+    // { description = "setting type (integer, string, bool or path)"; };
+
+  configType = with types; attrsOf (nullOr (either valueType configType))
+    // { description = ''
+          ncdns.conf configuration type. The format consists of an
+          attribute set of settings. Each setting can be either `null`,
+          a value or an attribute set. The allowed values are integers,
+          strings, booleans or paths.
+         '';
+       };
+
+  configFile = pkgs.runCommand "ncdns.conf"
+    { json = builtins.toJSON cfg.settings;
+      passAsFile = [ "json" ];
+    }
+    "${pkgs.remarshal}/bin/json2toml < $jsonPath > $out";
+
+  defaultFiles = {
+    public  = "${dataDir}/bit.key";
+    private = "${dataDir}/bit.private";
+    zonePublic  = "${dataDir}/bit-zone.key";
+    zonePrivate = "${dataDir}/bit-zone.private";
+  };
+
+  # if all keys are the default value
+  needsKeygen = all id (flip mapAttrsToList cfg.dnssec.keys
+    (n: v: v == getAttr n defaultFiles));
+
+  mkDefaultAttrs = mapAttrs (n: v: mkDefault v);
+
+in
+
+{
+
+  ###### interface
+
+  options = {
+
+    services.ncdns = {
+
+      enable = mkEnableOption ''
+        ncdns, a Go daemon to bridge Namecoin to DNS.
+        To resolve .bit domains set <literal>services.namecoind.enable = true;</literal>
+        and an RPC username/password
+      '';
+
+      address = mkOption {
+        type = types.str;
+        default = "127.0.0.1";
+        description = ''
+          The IP address the ncdns resolver will bind to.  Leave this unchanged
+          if you do not wish to directly expose the resolver.
+        '';
+      };
+
+      port = mkOption {
+        type = types.port;
+        default = 5333;
+        description = ''
+          The port the ncdns resolver will bind to.
+        '';
+      };
+
+      identity.hostname = mkOption {
+        type = types.str;
+        default = config.networking.hostName;
+        example = "example.com";
+        description = ''
+          The hostname of this ncdns instance, which defaults to the machine
+          hostname. If specified, ncdns lists the hostname as an NS record at
+          the zone apex:
+          <programlisting>
+          bit. IN NS ns1.example.com.
+          </programlisting>
+          If unset ncdns will generate an internal psuedo-hostname under the
+          zone, which will resolve to the value of
+          <option>services.ncdns.identity.address</option>.
+          If you are only using ncdns locally you can ignore this.
+        '';
+      };
+
+      identity.hostmaster = mkOption {
+        type = types.str;
+        default = "";
+        example = "root@example.com";
+        description = ''
+          An email address for the SOA record at the bit zone.
+          If you are only using ncdns locally you can ignore this.
+        '';
+      };
+
+      identity.address = mkOption {
+        type = types.str;
+        default = "127.127.127.127";
+        description = ''
+          The IP address the hostname specified in
+          <option>services.ncdns.identity.hostname</option> should resolve to.
+          If you are only using ncdns locally you can ignore this.
+        '';
+      };
+
+      dnssec.enable = mkEnableOption ''
+        DNSSEC support in ncdns. This will generate KSK and ZSK keypairs
+        (unless provided via the options
+        <option>services.ncdns.dnssec.publicKey</option>,
+        <option>services.ncdns.dnssec.privateKey</option> etc.) and add a trust
+        anchor to recursive resolvers
+      '';
+
+      dnssec.keys.public = mkOption {
+        type = types.path;
+        default = defaultFiles.public;
+        description = ''
+          Path to the file containing the KSK public key.
+          The key can be generated using the <literal>dnssec-keygen</literal>
+          command, provided by the package <package>bind</package> as follows:
+          <programlisting>
+          $ dnssec-keygen -a RSASHA256 -3 -b 2048 -f KSK bit
+          </programlisting>
+        '';
+      };
+
+      dnssec.keys.private = mkOption {
+        type = types.path;
+        default = defaultFiles.private;
+        description = ''
+          Path to the file containing the KSK private key.
+        '';
+      };
+
+      dnssec.keys.zonePublic = mkOption {
+        type = types.path;
+        default = defaultFiles.zonePublic;
+        description = ''
+          Path to the file containing the ZSK public key.
+          The key can be generated using the <literal>dnssec-keygen</literal>
+          command, provided by the package <package>bind</package> as follows:
+          <programlisting>
+          $ dnssec-keygen -a RSASHA256 -3 -b 2048 bit
+          </programlisting>
+        '';
+      };
+
+      dnssec.keys.zonePrivate = mkOption {
+        type = types.path;
+        default = defaultFiles.zonePrivate;
+        description = ''
+          Path to the file containing the ZSK private key.
+        '';
+      };
+
+      settings = mkOption {
+        type = configType;
+        default = { };
+        example = literalExample ''
+          { # enable webserver
+            ncdns.httplistenaddr = ":8202";
+
+            # synchronize TLS certs
+            certstore.nss = true;
+            # note: all paths are relative to the config file
+            certstore.nsscertdir =  "../../var/lib/ncdns";
+            certstore.nssdbdir = "../../home/alice/.pki/nssdb";
+          }
+        '';
+        description = ''
+          ncdns settings. Use this option to configure ncds
+          settings not exposed in a NixOS option or to bypass one.
+          See the example ncdns.conf file at <link xlink:href="
+          https://git.io/JfX7g"/> for the available options.
+        '';
+      };
+
+    };
+
+    services.pdns-recursor.resolveNamecoin = mkOption {
+      type = types.bool;
+      default = false;
+      description = ''
+        Resolve <literal>.bit</literal> top-level domains using ncdns and namecoin.
+      '';
+    };
+
+  };
+
+
+  ###### implementation
+
+  config = mkIf cfg.enable {
+
+    services.pdns-recursor = mkIf cfgs.pdns-recursor.resolveNamecoin {
+      forwardZonesRecurse.bit = "127.0.0.1:${toString cfg.port}";
+      luaConfig =
+        if cfg.dnssec.enable
+          then ''readTrustAnchorsFromFile("${cfg.dnssec.keys.public}")''
+          else ''addNTA("bit", "namecoin DNSSEC disabled")'';
+    };
+
+    # Avoid pdns-recursor not finding the DNSSEC keys
+    systemd.services.pdns-recursor = mkIf cfgs.pdns-recursor.resolveNamecoin {
+      after = [ "ncdns.service" ];
+      wants = [ "ncdns.service" ];
+    };
+
+    services.ncdns.settings = mkDefaultAttrs {
+      ncdns =
+        { # Namecoin RPC
+          namecoinrpcaddress =
+            "${cfgs.namecoind.rpc.address}:${toString cfgs.namecoind.rpc.port}";
+          namecoinrpcusername = cfgs.namecoind.rpc.user;
+          namecoinrpcpassword = cfgs.namecoind.rpc.password;
+
+          # Identity
+          selfname = cfg.identity.hostname;
+          hostmaster = cfg.identity.hostmaster;
+          selfip = cfg.identity.address;
+
+          # Other
+          bind = "${cfg.address}:${toString cfg.port}";
+        }
+        // optionalAttrs cfg.dnssec.enable
+        { # DNSSEC
+          publickey  = "../.." + cfg.dnssec.keys.public;
+          privatekey = "../.." + cfg.dnssec.keys.private;
+          zonepublickey  = "../.." + cfg.dnssec.keys.zonePublic;
+          zoneprivatekey = "../.." + cfg.dnssec.keys.zonePrivate;
+        };
+
+        # Daemon
+        service.daemon = true;
+        xlog.journal = true;
+    };
+
+    users.users.ncdns =
+      { description = "ncdns daemon user"; };
+
+    systemd.services.ncdns = {
+      description = "ncdns daemon";
+      after    = [ "namecoind.service" ];
+      wantedBy = [ "multi-user.target" ];
+
+      serviceConfig = {
+        User = "ncdns";
+        StateDirectory = "ncdns";
+        Restart = "on-failure";
+        ExecStart = "${pkgs.ncdns}/bin/ncdns -conf=${configFile}";
+      };
+
+      preStart = optionalString (cfg.dnssec.enable && needsKeygen) ''
+        cd ${dataDir}
+        if [ ! -e bit.key ]; then
+          ${pkgs.bind}/bin/dnssec-keygen -a RSASHA256 -3 -b 2048 bit
+          mv Kbit.*.key bit-zone.key
+          mv Kbit.*.private bit-zone.private
+          ${pkgs.bind}/bin/dnssec-keygen -a RSASHA256 -3 -b 2048 -f KSK bit
+          mv Kbit.*.key bit.key
+          mv Kbit.*.private bit.private
+        fi
+      '';
+    };
+
+  };
+
+  meta.maintainers = with lib.maintainers; [ rnhmjoj ];
+
+}
diff --git a/nixpkgs/nixos/modules/services/networking/networkmanager.nix b/nixpkgs/nixos/modules/services/networking/networkmanager.nix
index cc789897b29f..17c549d42c32 100644
--- a/nixpkgs/nixos/modules/services/networking/networkmanager.nix
+++ b/nixpkgs/nixos/modules/services/networking/networkmanager.nix
@@ -458,7 +458,7 @@ in {
 
     systemd.services.NetworkManager-dispatcher = {
       wantedBy = [ "network.target" ];
-      restartTriggers = [ configFile ];
+      restartTriggers = [ configFile overrideNameserversScript ];
 
       # useful binaries for user-specified hooks
       path = [ pkgs.iproute pkgs.utillinux pkgs.coreutils ];
diff --git a/nixpkgs/nixos/modules/services/networking/nextdns.nix b/nixpkgs/nixos/modules/services/networking/nextdns.nix
new file mode 100644
index 000000000000..a633bff62ec7
--- /dev/null
+++ b/nixpkgs/nixos/modules/services/networking/nextdns.nix
@@ -0,0 +1,44 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.services.nextdns;
+in {
+  options = {
+    services.nextdns = {
+      enable = mkOption {
+        type = types.bool;
+        default = false;
+        description = "Whether to enable the NextDNS DNS/53 to DoH Proxy service.";
+      };
+      arguments = mkOption {
+        type = types.listOf types.str;
+        default = [];
+        example = [ "-config" "10.0.3.0/24=abcdef" ];
+        description = "Additional arguments to be passed to nextdns run.";
+      };
+    };
+  };
+
+  # https://github.com/nextdns/nextdns/blob/628ea509eaaccd27adb66337db03e5b56f6f38a8/host/service/systemd/service.go
+  config = mkIf cfg.enable {
+    systemd.services.nextdns = {
+      description = "NextDNS DNS/53 to DoH Proxy";
+      environment = {
+        SERVICE_RUN_MODE = "1";
+      };
+      serviceConfig = {
+        StartLimitInterval = 5;
+        StartLimitBurst = 10;
+        ExecStart = "${pkgs.nextdns}/bin/nextdns run ${escapeShellArgs config.services.nextdns.arguments}";
+        RestartSec = 120;
+        LimitMEMLOCK = "infinity";
+      };
+      after = [ "network.target" ];
+      before = [ "nss-lookup.target" ];
+      wants = [ "nss-lookup.target" ];
+      wantedBy = [ "multi-user.target" ];
+    };
+  };
+}
diff --git a/nixpkgs/nixos/modules/services/networking/nghttpx/default.nix b/nixpkgs/nixos/modules/services/networking/nghttpx/default.nix
index 881a2670f5db..b8a0a24e3aad 100644
--- a/nixpkgs/nixos/modules/services/networking/nghttpx/default.nix
+++ b/nixpkgs/nixos/modules/services/networking/nghttpx/default.nix
@@ -60,7 +60,7 @@ let
       # NB: nghttpx doesn't accept "tls", you must omit "no-tls" for
       # the default behavior of turning on TLS.
       params1 = lib.remove "tls" params0;
-          
+
       sections          = [ host] ++ params1;
       formattedSections = lib.concatStringsSep ";" sections;
     in
@@ -90,7 +90,7 @@ in
 { imports = [
     ./nghttpx-options.nix
   ];
-  
+
   config = lib.mkIf cfg.enable {
 
     users.groups.nghttpx = { };
@@ -98,7 +98,7 @@ in
       group = config.users.groups.nghttpx.name;
       isSystemUser = true;
     };
-      
+
 
     systemd.services = {
       nghttpx = {
diff --git a/nixpkgs/nixos/modules/services/networking/nsd.nix b/nixpkgs/nixos/modules/services/networking/nsd.nix
index 6e3eed0c5570..3ecbd06ee416 100644
--- a/nixpkgs/nixos/modules/services/networking/nsd.nix
+++ b/nixpkgs/nixos/modules/services/networking/nsd.nix
@@ -11,8 +11,6 @@ let
 
   # build nsd with the options needed for the given config
   nsdPkg = pkgs.nsd.override {
-    configFile = "${configFile}/nsd.conf";
-
     bind8Stats = cfg.bind8Stats;
     ipv6 = cfg.ipv6;
     ratelimit = cfg.ratelimit.enable;
@@ -897,7 +895,10 @@ in
               + "want, please enable 'services.nsd.rootServer'.";
     };
 
-    environment.systemPackages = [ nsdPkg ];
+    environment = {
+      systemPackages = [ nsdPkg ];
+      etc."nsd/nsd.conf".source = "${configFile}/nsd.conf";
+    };
 
     users.groups.${username}.gid = config.ids.gids.nsd;
 
diff --git a/nixpkgs/nixos/modules/services/networking/ntp/chrony.nix b/nixpkgs/nixos/modules/services/networking/ntp/chrony.nix
index b7e4c89a155c..78de50583f34 100644
--- a/nixpkgs/nixos/modules/services/networking/ntp/chrony.nix
+++ b/nixpkgs/nixos/modules/services/networking/ntp/chrony.nix
@@ -117,7 +117,6 @@ in
             ProtectHome = "yes";
             ProtectSystem = "full";
             PrivateTmp = "yes";
-            StateDirectory = "chrony";
           };
 
       };
diff --git a/nixpkgs/nixos/modules/services/networking/nylon.nix b/nixpkgs/nixos/modules/services/networking/nylon.nix
index 7c171281a926..bfc358cb12fb 100644
--- a/nixpkgs/nixos/modules/services/networking/nylon.nix
+++ b/nixpkgs/nixos/modules/services/networking/nylon.nix
@@ -140,7 +140,7 @@ in
     services.nylon = mkOption {
       default = {};
       description = "Collection of named nylon instances";
-      type = with types; loaOf (submodule nylonOpts);
+      type = with types; attrsOf (submodule nylonOpts);
       internal = true;
     };
 
diff --git a/nixpkgs/nixos/modules/services/networking/onedrive.nix b/nixpkgs/nixos/modules/services/networking/onedrive.nix
new file mode 100644
index 000000000000..c52f920bae25
--- /dev/null
+++ b/nixpkgs/nixos/modules/services/networking/onedrive.nix
@@ -0,0 +1,72 @@
+{ config, lib, pkgs, ... }:
+let
+  cfg = config.services.onedrive;
+
+  onedriveLauncher =  pkgs.writeShellScriptBin
+    "onedrive-launcher"
+    ''
+      # XDG_CONFIG_HOME is not recognized in the environment here.
+      if [ -f $HOME/.config/onedrive-launcher ]
+      then
+        # Hopefully using underscore boundary helps locate variables
+        for _onedrive_config_dirname_ in $(cat $HOME/.config/onedrive-launcher | grep -v '[ \t]*#' )
+        do
+          systemctl --user start onedrive@$_onedrive_config_dirname_
+        done
+      else
+        systemctl --user start onedrive@onedrive
+      fi
+    ''
+  ;
+
+in {
+  ### Documentation
+  # meta.doc = ./onedrive.xml;
+
+  ### Interface
+
+  options.services.onedrive = {
+    enable = lib.mkOption {
+      type = lib.types.bool;
+      default = false;
+      description = "Enable OneDrive service";
+    };
+
+     package = lib.mkOption {
+       type = lib.types.package;
+       default = pkgs.onedrive;
+       defaultText = "pkgs.onedrive";
+       example = lib.literalExample "pkgs.onedrive";
+       description = ''
+         OneDrive package to use.
+       '';
+     };
+  };
+### Implementation
+
+  config = lib.mkIf cfg.enable {
+    environment.systemPackages = [ cfg.package ];
+
+    systemd.user.services."onedrive@" = {
+      description = "Onedrive sync service";
+
+      serviceConfig = {
+        Type = "simple";
+        ExecStart = ''
+          ${cfg.package}/bin/onedrive --monitor --confdir=%h/.config/%i
+        '';
+        Restart="on-failure";
+        RestartSec=3;
+        RestartPreventExitStatus=3;
+      };
+    };
+
+    systemd.user.services.onedrive-launcher = {
+      wantedBy = [ "default.target" ];
+      serviceConfig = {
+        Type = "oneshot";
+        ExecStart = "${onedriveLauncher}/bin/onedrive-launcher";
+      };
+    };
+  };
+}
diff --git a/nixpkgs/nixos/modules/services/networking/onedrive.xml b/nixpkgs/nixos/modules/services/networking/onedrive.xml
new file mode 100644
index 000000000000..5a9dcf01aeee
--- /dev/null
+++ b/nixpkgs/nixos/modules/services/networking/onedrive.xml
@@ -0,0 +1,34 @@
+<chapter xmlns="http://docbook.org/ns/docbook"
+         xmlns:xlink="http://www.w3.org/1999/xlink"
+         xmlns:xi="http://www.w3.org/2001/XInclude"
+         version="5.0"
+         xml:id="onedrive">
+ <title>Microsoft OneDrive</title>
+ <para>
+  Microsoft Onedrive is a popular cloud file-hosting service, used by 85% of Fortune 500 companies. NixOS uses a popular OneDrive client for Linux maintained by github user abraunegg. The Linux client is excellent and allows customization of which files or paths to download, not much unlike the default Windows OneDrive client by Microsoft itself. The client allows syncing with multiple onedrive accounts at the same time, of any type- OneDrive personal, OneDrive business, Office365 and Sharepoint libraries, without any additional charge.
+ </para>
+ <para>
+  For more information, guides and documentation, see <link xlink:href="https://abraunegg.github.io/"/>.
+ </para>
+ <para>
+  To enable OneDrive support, add the following to your <filename>configuration.nix</filename>:
+<programlisting>
+<xref linkend="opt-services.onedrive.enable"/> = true;
+</programlisting>
+  This installs the <literal>onedrive</literal> package and a service <literal>onedriveLauncher</literal> which will instantiate a <literal>onedrive</literal> service for all your OneDrive accounts. Follow the steps in documentation of the onedrive client to setup your accounts. To use the service with multiple accounts, create a file named <filename>onedrive-launcher</filename> in <filename>~/.config</filename> and add the filename of the config directory, relative to <filename>~/.config</filename>. For example, if you have two OneDrive accounts with configs in <filename>~/.config/onedrive_bob_work</filename> and <filename>~/.config/onedrive_bob_personal</filename>, add the following lines:
+<programlisting>
+onedrive_bob_work
+# Not in use:
+# onedrive_bob_office365
+onedrive_bob_personal
+</programlisting>
+  No such file needs to be created if you are using only a single OneDrive account with config in the default location <filename>~/.config/onedrive</filename>, in the absence of <filename>~/.config/onedrive-launcher</filename>, only a single service is instantiated, with default config path.
+</para>
+
+  <para>
+  If you wish to use a custom OneDrive package, say from another channel, add the following line:
+<programlisting>
+<xref linkend="opt-services.onedrive.package"/> = pkgs.unstable.onedrive;
+</programlisting>
+ </para>
+</chapter>
diff --git a/nixpkgs/nixos/modules/services/networking/openvpn.nix b/nixpkgs/nixos/modules/services/networking/openvpn.nix
index dcd7e9e5fa4c..650f9c84ac72 100644
--- a/nixpkgs/nixos/modules/services/networking/openvpn.nix
+++ b/nixpkgs/nixos/modules/services/networking/openvpn.nix
@@ -11,7 +11,7 @@ let
   makeOpenVPNJob = cfg: name:
     let
 
-      path = (getAttr "openvpn-${name}" config.systemd.services).path;
+      path = makeBinPath (getAttr "openvpn-${name}" config.systemd.services).path;
 
       upScript = ''
         #! /bin/sh
diff --git a/nixpkgs/nixos/modules/services/networking/prosody.nix b/nixpkgs/nixos/modules/services/networking/prosody.nix
index cdd341c9fb62..a6c1cb0f4797 100644
--- a/nixpkgs/nixos/modules/services/networking/prosody.nix
+++ b/nixpkgs/nixos/modules/services/networking/prosody.nix
@@ -655,7 +655,7 @@ in
 
         description = "Define the virtual hosts";
 
-        type = with types; loaOf (submodule vHostOpts);
+        type = with types; attrsOf (submodule vHostOpts);
 
         example = {
           myhost = {
@@ -772,7 +772,7 @@ in
       };
 
       disco_items = {
-      ${ lib.concatStringsSep "\n" (builtins.map (x: ''{ "${x.url}", "${x.description}"};'') discoItems)} 
+      ${ lib.concatStringsSep "\n" (builtins.map (x: ''{ "${x.url}", "${x.description}"};'') discoItems)}
       };
 
       allow_registration = ${toLua cfg.allowRegistration}
diff --git a/nixpkgs/nixos/modules/services/networking/prosody.xml b/nixpkgs/nixos/modules/services/networking/prosody.xml
index 7859cb1578b7..471240cd1475 100644
--- a/nixpkgs/nixos/modules/services/networking/prosody.xml
+++ b/nixpkgs/nixos/modules/services/networking/prosody.xml
@@ -43,10 +43,10 @@ services.prosody = {
   <link linkend="opt-services.prosody.ssl.cert">ssl.cert</link> = "/var/lib/acme/example.org/fullchain.pem";
   <link linkend="opt-services.prosody.ssl.key">ssl.key</link> = "/var/lib/acme/example.org/key.pem";
   <link linkend="opt-services.prosody.virtualHosts">virtualHosts</link>."example.org" = {
-      <link linkend="opt-services.prosody.virtualHosts._name__.enabled">enabled</link> = true;
-      <link linkend="opt-services.prosody.virtualHosts._name__.domain">domain</link> = "example.org";
-      <link linkend="opt-services.prosody.virtualHosts._name__.ssl.cert">ssl.cert</link> = "/var/lib/acme/example.org/fullchain.pem";
-      <link linkend="opt-services.prosody.virtualHosts._name__.ssl.key">ssl.key</link> = "/var/lib/acme/example.org/key.pem";
+      <link linkend="opt-services.prosody.virtualHosts._name_.enabled">enabled</link> = true;
+      <link linkend="opt-services.prosody.virtualHosts._name_.domain">domain</link> = "example.org";
+      <link linkend="opt-services.prosody.virtualHosts._name_.ssl.cert">ssl.cert</link> = "/var/lib/acme/example.org/fullchain.pem";
+      <link linkend="opt-services.prosody.virtualHosts._name_.ssl.key">ssl.key</link> = "/var/lib/acme/example.org/key.pem";
   };
   <link linkend="opt-services.prosody.muc">muc</link> = [ {
       <link linkend="opt-services.prosody.muc">domain</link> = "conference.example.org";
@@ -65,7 +65,7 @@ services.prosody = {
    you'll need a single TLS certificate covering your main endpoint,
    the MUC one as well as the HTTP Upload one. We can generate such a
    certificate by leveraging the ACME
-   <link linkend="opt-security.acme.certs._name_.extraDomains">extraDomains</link> module option.
+   <link linkend="opt-security.acme.certs._name_.extraDomainNames">extraDomainNames</link> module option.
  </para>
  <para>
    Provided the setup detailed in the previous section, you'll need the following acme configuration to generate
@@ -78,8 +78,7 @@ security.acme = {
     "example.org" = {
       <link linkend="opt-security.acme.certs._name_.webroot">webroot</link> = "/var/www/example.org";
       <link linkend="opt-security.acme.certs._name_.email">email</link> = "root@example.org";
-      <link linkend="opt-security.acme.certs._name_.extraDomains">extraDomains."conference.example.org"</link> = null;
-      <link linkend="opt-security.acme.certs._name_.extraDomains">extraDomains."upload.example.org"</link> = null;
+      <link linkend="opt-security.acme.certs._name_.extraDomainNames">extraDomainNames</link> = [ "conference.example.org" "upload.example.org" ];
     };
   };
 };</programlisting>
diff --git a/nixpkgs/nixos/modules/services/networking/radicale.nix b/nixpkgs/nixos/modules/services/networking/radicale.nix
index 30bf22586f86..5af035fd59e0 100644
--- a/nixpkgs/nixos/modules/services/networking/radicale.nix
+++ b/nixpkgs/nixos/modules/services/networking/radicale.nix
@@ -8,8 +8,10 @@ let
 
   confFile = pkgs.writeText "radicale.conf" cfg.config;
 
-  # This enables us to default to version 2 while still not breaking configurations of people with version 1
-  defaultPackage = if versionAtLeast config.system.stateVersion "17.09" then {
+  defaultPackage = if versionAtLeast config.system.stateVersion "20.09" then {
+    pkg = pkgs.radicale3;
+    text = "pkgs.radicale3";
+  } else if versionAtLeast config.system.stateVersion "17.09" then {
     pkg = pkgs.radicale2;
     text = "pkgs.radicale2";
   } else {
@@ -35,8 +37,9 @@ in
       defaultText = defaultPackage.text;
       description = ''
         Radicale package to use. This defaults to version 1.x if
-        <literal>system.stateVersion &lt; 17.09</literal> and version 2.x
-        otherwise.
+        <literal>system.stateVersion &lt; 17.09</literal>, version 2.x if
+        <literal>17.09 ≤ system.stateVersion &lt; 20.09</literal>, and
+        version 3.x otherwise.
       '';
     };
 
diff --git a/nixpkgs/nixos/modules/services/networking/resilio.nix b/nixpkgs/nixos/modules/services/networking/resilio.nix
index e74e03fc0b07..6193d7340fc4 100644
--- a/nixpkgs/nixos/modules/services/networking/resilio.nix
+++ b/nixpkgs/nixos/modules/services/networking/resilio.nix
@@ -30,12 +30,12 @@ let
     download_limit = cfg.downloadLimit;
     upload_limit = cfg.uploadLimit;
     lan_encrypt_data = cfg.encryptLAN;
-  } // optionalAttrs cfg.enableWebUI {
+  } // optionalAttrs (cfg.directoryRoot != "") { directory_root = cfg.directoryRoot; }
+    // optionalAttrs cfg.enableWebUI {
     webui = { listen = "${cfg.httpListenAddr}:${toString cfg.httpListenPort}"; } //
       (optionalAttrs (cfg.httpLogin != "") { login = cfg.httpLogin; }) //
       (optionalAttrs (cfg.httpPass != "") { password = cfg.httpPass; }) //
-      (optionalAttrs (cfg.apiKey != "") { api_key = cfg.apiKey; }) //
-      (optionalAttrs (cfg.directoryRoot != "") { directory_root = cfg.directoryRoot; });
+      (optionalAttrs (cfg.apiKey != "") { api_key = cfg.apiKey; });
   } // optionalAttrs (sharedFoldersRecord != []) {
     shared_folders = sharedFoldersRecord;
   }));
@@ -109,8 +109,8 @@ in
 
       httpListenAddr = mkOption {
         type = types.str;
-        default = "0.0.0.0";
-        example = "1.2.3.4";
+        default = "[::1]";
+        example = "0.0.0.0";
         description = ''
           HTTP address to bind to.
         '';
@@ -206,16 +206,16 @@ in
 
           If you would like to be able to modify the contents of this
           directories, it is recommended that you make your user a
-          member of the <literal>resilio</literal> group.
+          member of the <literal>rslsync</literal> group.
 
           Directories in this list should be in the
-          <literal>resilio</literal> group, and that group must have
+          <literal>rslsync</literal> group, and that group must have
           write access to the directory. It is also recommended that
           <literal>chmod g+s</literal> is applied to the directory
           so that any sub directories created will also belong to
-          the <literal>resilio</literal> group. Also,
-          <literal>setfacl -d -m group:resilio:rwx</literal> and
-          <literal>setfacl -m group:resilio:rwx</literal> should also
+          the <literal>rslsync</literal> group. Also,
+          <literal>setfacl -d -m group:rslsync:rwx</literal> and
+          <literal>setfacl -m group:rslsync:rwx</literal> should also
           be applied so that the sub directories are writable by
           the group.
         '';
diff --git a/nixpkgs/nixos/modules/services/networking/robustirc-bridge.nix b/nixpkgs/nixos/modules/services/networking/robustirc-bridge.nix
new file mode 100644
index 000000000000..255af79ec04b
--- /dev/null
+++ b/nixpkgs/nixos/modules/services/networking/robustirc-bridge.nix
@@ -0,0 +1,47 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.services.robustirc-bridge;
+in
+{
+  options = {
+    services.robustirc-bridge = {
+      enable = mkEnableOption "RobustIRC bridge";
+
+      extraFlags = mkOption {
+        type = types.listOf types.str;
+        default = [];
+        description = ''Extra flags passed to the <command>robustirc-bridge</command> command. See <link xlink:href="https://robustirc.net/docs/adminguide.html#_bridge">RobustIRC Documentation</link> or robustirc-bridge(1) for details.'';
+        example = [
+          "-network robustirc.net"
+        ];
+      };
+    };
+  };
+
+  config = mkIf cfg.enable {
+    systemd.services.robustirc-bridge = {
+      description = "RobustIRC bridge";
+      documentation = [
+        "man:robustirc-bridge(1)"
+        "https://robustirc.net/"
+      ];
+      wantedBy = [ "multi-user.target" ];
+      after = [ "network.target" ];
+
+      serviceConfig = {
+        DynamicUser = true;
+        ExecStart = "${pkgs.robustirc-bridge}/bin/robustirc-bridge ${concatStringsSep " " cfg.extraFlags}";
+        Restart = "on-failure";
+
+        # Hardening
+        PrivateDevices = true;
+        ProtectSystem = true;
+        ProtectHome = true;
+        PrivateTmp = true;
+      };
+    };
+  };
+}
diff --git a/nixpkgs/nixos/modules/services/networking/seeks.nix b/nixpkgs/nixos/modules/services/networking/seeks.nix
deleted file mode 100644
index 40729225b6d0..000000000000
--- a/nixpkgs/nixos/modules/services/networking/seeks.nix
+++ /dev/null
@@ -1,75 +0,0 @@
-{ config, lib, pkgs, ... }:
-
-with lib;
-
-let
-
-  cfg = config.services.seeks;
-
-  confDir = cfg.confDir;
-
-  seeks = pkgs.seeks.override { seeks_confDir = confDir; };
-
-in
-
-{
-
-  ###### interface
-
-  options = {
-
-    services.seeks = {
-
-      enable = mkOption {
-        default = false;
-        type = types.bool;
-        description = "
-          Whether to enable the Seeks server.
-        ";
-      };
-
-      confDir = mkOption {
-        default = "";
-        type = types.str;
-        description = "
-          The Seeks server configuration. If it is not specified,
-          a default configuration is used.
-        ";
-      };
-
-    };
-
-  };
-
-
-  ###### implementation
-
-  config = mkIf config.services.seeks.enable {
-
-    users.users.seeks =
-      { uid = config.ids.uids.seeks;
-        description = "Seeks user";
-        createHome = true;
-        home = "/var/lib/seeks";
-      };
-
-    users.groups.seeks =
-      { gid = config.ids.gids.seeks;
-      };
-
-    systemd.services.seeks =
-      {
-        description = "Seeks server, the p2p search engine.";
-        after = [ "network.target" ];
-        wantedBy = [ "multi-user.target" ];
-        serviceConfig = {
-          User = "seeks";
-          ExecStart = "${seeks}/bin/seeks";
-        };
-      };
-
-    environment.systemPackages = [ seeks ];
-
-  };
-
-}
diff --git a/nixpkgs/nixos/modules/services/networking/shadowsocks.nix b/nixpkgs/nixos/modules/services/networking/shadowsocks.nix
index af12db590f00..d2541f9a6dff 100644
--- a/nixpkgs/nixos/modules/services/networking/shadowsocks.nix
+++ b/nixpkgs/nixos/modules/services/networking/shadowsocks.nix
@@ -11,8 +11,13 @@ let
     method = cfg.encryptionMethod;
     mode = cfg.mode;
     user = "nobody";
-    fast_open = true;
-  } // optionalAttrs (cfg.password != null) { password = cfg.password; };
+    fast_open = cfg.fastOpen;
+  } // optionalAttrs (cfg.plugin != null) {
+    plugin = cfg.plugin;
+    plugin_opts = cfg.pluginOpts;
+  } // optionalAttrs (cfg.password != null) {
+    password = cfg.password;
+  } // cfg.extraConfig;
 
   configFile = pkgs.writeText "shadowsocks.json" (builtins.toJSON opts);
 
@@ -74,6 +79,14 @@ in
         '';
       };
 
+      fastOpen = mkOption {
+        type = types.bool;
+        default = true;
+        description = ''
+          use TCP fast-open
+        '';
+      };
+
       encryptionMethod = mkOption {
         type = types.str;
         default = "chacha20-ietf-poly1305";
@@ -82,6 +95,41 @@ in
         '';
       };
 
+      plugin = mkOption {
+        type = types.nullOr types.str;
+        default = null;
+        example = "\${pkgs.shadowsocks-v2ray-plugin}/bin/v2ray-plugin";
+        description = ''
+          SIP003 plugin for shadowsocks
+        '';
+      };
+
+      pluginOpts = mkOption {
+        type = types.str;
+        default = "";
+        example = "server;host=example.com";
+        description = ''
+          Options to pass to the plugin if one was specified
+        '';
+      };
+
+      extraConfig = mkOption {
+        type = types.attrs;
+        default = {};
+        example = ''
+          {
+            nameserver = "8.8.8.8";
+          }
+        '';
+        description = ''
+          Additional configuration for shadowsocks that is not covered by the
+          provided options. The provided attrset will be serialized to JSON and
+          has to contain valid shadowsocks options. Unfortunately most
+          additional options are undocumented but it's easy to find out what is
+          available by looking into the source code of
+          <link xlink:href="https://github.com/shadowsocks/shadowsocks-libev/blob/master/src/jconf.c"/>
+        '';
+      };
     };
 
   };
@@ -99,7 +147,7 @@ in
       description = "shadowsocks-libev Daemon";
       after = [ "network.target" ];
       wantedBy = [ "multi-user.target" ];
-      path = [ pkgs.shadowsocks-libev ] ++ optional (cfg.passwordFile != null) pkgs.jq;
+      path = [ pkgs.shadowsocks-libev ] ++ optional (cfg.plugin != null) cfg.plugin ++ optional (cfg.passwordFile != null) pkgs.jq;
       serviceConfig.PrivateTmp = true;
       script = ''
         ${optionalString (cfg.passwordFile != null) ''
diff --git a/nixpkgs/nixos/modules/services/networking/skydns.nix b/nixpkgs/nixos/modules/services/networking/skydns.nix
index e79d6de92644..ea466de93275 100644
--- a/nixpkgs/nixos/modules/services/networking/skydns.nix
+++ b/nixpkgs/nixos/modules/services/networking/skydns.nix
@@ -64,7 +64,7 @@ in {
     extraConfig = mkOption {
       default = {};
       type = types.attrsOf types.str;
-      description = "Skydns attribute set of extra config options passed as environemnt variables.";
+      description = "Skydns attribute set of extra config options passed as environment variables.";
     };
   };
 
diff --git a/nixpkgs/nixos/modules/services/networking/ssh/sshd.nix b/nixpkgs/nixos/modules/services/networking/ssh/sshd.nix
index a294bbfba0aa..d0251277e9e8 100644
--- a/nixpkgs/nixos/modules/services/networking/ssh/sshd.nix
+++ b/nixpkgs/nixos/modules/services/networking/ssh/sshd.nix
@@ -232,6 +232,14 @@ in
         '';
       };
 
+      banner = mkOption {
+        type = types.nullOr types.lines;
+        default = null;
+        description = ''
+          Message to display to the remote user before authentication is allowed.
+        '';
+      };
+
       authorizedKeysFiles = mkOption {
         type = types.listOf types.str;
         default = [];
@@ -368,7 +376,7 @@ in
     };
 
     users.users = mkOption {
-      type = with types; loaOf (submodule userOptions);
+      type = with types; attrsOf (submodule userOptions);
     };
 
   };
@@ -485,6 +493,8 @@ in
       ''
         UsePAM yes
 
+        Banner ${if cfg.banner == null then "none" else pkgs.writeText "ssh_banner" cfg.banner}
+
         AddressFamily ${if config.networking.enableIPv6 then "any" else "inet"}
         ${concatMapStrings (port: ''
           Port ${toString port}
diff --git a/nixpkgs/nixos/modules/services/networking/sslh.nix b/nixpkgs/nixos/modules/services/networking/sslh.nix
index c4fa370a5fef..0921febba668 100644
--- a/nixpkgs/nixos/modules/services/networking/sslh.nix
+++ b/nixpkgs/nixos/modules/services/networking/sslh.nix
@@ -15,7 +15,11 @@ let
 
     listen:
     (
-      { host: "${cfg.listenAddress}"; port: "${toString cfg.port}"; }
+      ${
+        concatMapStringsSep ",\n"
+        (addr: ''{ host: "${addr}"; port: "${toString cfg.port}"; }'')
+        cfg.listenAddresses
+      }
     );
 
     ${cfg.appendConfig}
@@ -33,6 +37,10 @@ let
   '';
 in
 {
+  imports = [
+    (mkRenamedOptionModule [ "services" "sslh" "listenAddress" ] [ "services" "sslh" "listenAddresses" ])
+  ];
+
   options = {
     services.sslh = {
       enable = mkEnableOption "sslh";
@@ -55,10 +63,10 @@ in
         description = "Will the services behind sslh (Apache, sshd and so on) see the external IP and ports as if the external world connected directly to them";
       };
 
-      listenAddress = mkOption {
-        type = types.str;
-        default = "0.0.0.0";
-        description = "Listening address or hostname.";
+      listenAddresses = mkOption {
+        type = types.coercedTo types.str singleton (types.listOf types.str);
+        default = [ "0.0.0.0" "[::]" ];
+        description = "Listening addresses or hostnames.";
       };
 
       port = mkOption {
diff --git a/nixpkgs/nixos/modules/services/networking/supplicant.nix b/nixpkgs/nixos/modules/services/networking/supplicant.nix
index b5b9989ce186..20704be9b36f 100644
--- a/nixpkgs/nixos/modules/services/networking/supplicant.nix
+++ b/nixpkgs/nixos/modules/services/networking/supplicant.nix
@@ -76,9 +76,9 @@ in
     networking.supplicant = mkOption {
       type = with types; attrsOf (submodule {
         options = {
-  
+
           configFile = {
-  
+
             path = mkOption {
               type = types.nullOr types.path;
               default = null;
@@ -89,7 +89,7 @@ in
                 precedence over options defined in <literal>configFile</literal>.
               '';
             };
-  
+
             writable = mkOption {
               type = types.bool;
               default = false;
@@ -98,9 +98,9 @@ in
                 <literal>wpa_supplicant</literal>.
               '';
             };
-  
+
           };
-  
+
           extraConf = mkOption {
             type = types.lines;
             default = "";
@@ -126,7 +126,7 @@ in
               use the <literal>configFile</literal> instead.
             '';
           };
-  
+
           extraCmdArgs = mkOption {
             type = types.str;
             default = "";
@@ -134,21 +134,21 @@ in
             description =
               "Command line arguments to add when executing <literal>wpa_supplicant</literal>.";
           };
-  
+
           driver = mkOption {
             type = types.nullOr types.str;
             default = "nl80211,wext";
             description = "Force a specific wpa_supplicant driver.";
           };
-  
+
           bridge = mkOption {
             type = types.str;
             default = "";
             description = "Name of the bridge interface that wpa_supplicant should listen at.";
           };
-  
+
           userControlled = {
-  
+
             enable = mkOption {
               type = types.bool;
               default = false;
@@ -159,20 +159,20 @@ in
                 access points.
               '';
             };
-  
+
             socketDir = mkOption {
               type = types.str;
               default = "/run/wpa_supplicant";
               description = "Directory of sockets for controlling wpa_supplicant.";
             };
-  
+
             group = mkOption {
               type = types.str;
               default = "wheel";
               example = "network";
               description = "Members of this group can control wpa_supplicant.";
             };
-  
+
           };
         };
       });
diff --git a/nixpkgs/nixos/modules/services/networking/syncthing.nix b/nixpkgs/nixos/modules/services/networking/syncthing.nix
index e717d78feed5..28348c7893a0 100644
--- a/nixpkgs/nixos/modules/services/networking/syncthing.nix
+++ b/nixpkgs/nixos/modules/services/networking/syncthing.nix
@@ -18,6 +18,7 @@ let
     fsWatcherEnabled = folder.watch;
     fsWatcherDelayS = folder.watchDelay;
     ignorePerms = folder.ignorePerms;
+    ignoreDelete = folder.ignoreDelete;
     versioning = folder.versioning;
   }) (filterAttrs (
     _: folder:
@@ -284,8 +285,6 @@ in {
                 });
               };
 
-
-
               rescanInterval = mkOption {
                 type = types.int;
                 default = 3600;
@@ -327,6 +326,16 @@ in {
                 '';
               };
 
+              ignoreDelete = mkOption {
+                type = types.bool;
+                default = false;
+                description = ''
+                  Whether to delete files in destination. See <link
+                  xlink:href="https://docs.syncthing.net/advanced/folder-ignoredelete.html">
+                  upstream's docs</link>.
+                '';
+              };
+
             };
           }));
         };
diff --git a/nixpkgs/nixos/modules/services/networking/tinc.nix b/nixpkgs/nixos/modules/services/networking/tinc.nix
index e98aafc20937..725bd9bf9403 100644
--- a/nixpkgs/nixos/modules/services/networking/tinc.nix
+++ b/nixpkgs/nixos/modules/services/networking/tinc.nix
@@ -48,6 +48,14 @@ in
               '';
             };
 
+            rsaPrivateKeyFile = mkOption {
+              default = null;
+              type = types.nullOr types.path;
+              description = ''
+                Path of the private RSA keyfile.
+              '';
+            };
+
             debugLevel = mkOption {
               default = 0;
               type = types.addCheck types.int (l: l >= 0 && l <= 5);
@@ -139,6 +147,7 @@ in
               Name = ${if data.name == null then "$HOST" else data.name}
               DeviceType = ${data.interfaceType}
               ${optionalString (data.ed25519PrivateKeyFile != null) "Ed25519PrivateKeyFile = ${data.ed25519PrivateKeyFile}"}
+              ${optionalString (data.rsaPrivateKeyFile != null) "PrivateKeyFile = ${data.rsaPrivateKeyFile}"}
               ${optionalString (data.listenAddress != null) "ListenAddress = ${data.listenAddress}"}
               ${optionalString (data.bindToAddress != null) "BindToAddress = ${data.bindToAddress}"}
               Interface = tinc.${network}
@@ -170,12 +179,15 @@ in
           # Determine how we should generate our keys
           if type tinc >/dev/null 2>&1; then
             # Tinc 1.1+ uses the tinc helper application for key generation
-          ${if data.ed25519PrivateKeyFile != null then "  # Keyfile managed by nix" else ''
+          ${if data.ed25519PrivateKeyFile != null then "  # ed25519 Keyfile managed by nix" else ''
             # Prefer ED25519 keys (only in 1.1+)
             [ -f "/etc/tinc/${network}/ed25519_key.priv" ] || tinc -n ${network} generate-ed25519-keys
           ''}
-            # Otherwise use RSA keys
+          ${if data.rsaPrivateKeyFile != null then "  # RSA Keyfile managed by nix" else ''
             [ -f "/etc/tinc/${network}/rsa_key.priv" ] || tinc -n ${network} generate-rsa-keys 4096
+          ''}
+            # In case there isn't anything to do
+            true
           else
             # Tinc 1.0 uses the tincd application
             [ -f "/etc/tinc/${network}/rsa_key.priv" ] || tincd -n ${network} -K 4096
diff --git a/nixpkgs/nixos/modules/services/networking/trickster.nix b/nixpkgs/nixos/modules/services/networking/trickster.nix
index 8760dd5a9382..49c945adb80f 100644
--- a/nixpkgs/nixos/modules/services/networking/trickster.nix
+++ b/nixpkgs/nixos/modules/services/networking/trickster.nix
@@ -106,7 +106,8 @@ in
         Restart = "always";
       };
     };
+  };
 
-  };  
-}
+  meta.maintainers = with maintainers; [ _1000101 ];
 
+}
diff --git a/nixpkgs/nixos/modules/services/networking/unifi.nix b/nixpkgs/nixos/modules/services/networking/unifi.nix
index 4bdfa8143dce..62bcf7a14972 100644
--- a/nixpkgs/nixos/modules/services/networking/unifi.nix
+++ b/nixpkgs/nixos/modules/services/networking/unifi.nix
@@ -162,6 +162,8 @@ in
       unitConfig.RequiresMountsFor = stateDir;
       # This a HACK to fix missing dependencies of dynamic libs extracted from jars
       environment.LD_LIBRARY_PATH = with pkgs.stdenv; "${cc.cc.lib}/lib";
+      # Make sure package upgrades trigger a service restart
+      restartTriggers = [ cfg.unifiPackage cfg.mongodbPackage ];
 
       serviceConfig = {
         Type = "simple";
diff --git a/nixpkgs/nixos/modules/services/networking/wasabibackend.nix b/nixpkgs/nixos/modules/services/networking/wasabibackend.nix
new file mode 100644
index 000000000000..6eacffe709b0
--- /dev/null
+++ b/nixpkgs/nixos/modules/services/networking/wasabibackend.nix
@@ -0,0 +1,158 @@
+{ config, lib, pkgs, ... }:
+
+let
+  cfg = config.services.wasabibackend;
+
+  inherit (lib) mkEnableOption mkIf mkOption optionalAttrs optionalString types;
+
+  confOptions = {
+      BitcoinRpcConnectionString = "${cfg.rpc.user}:${cfg.rpc.password}";
+  } // optionalAttrs (cfg.network == "mainnet") {
+      Network = "Main";
+      MainNetBitcoinP2pEndPoint = "${cfg.endpoint.ip}:${toString cfg.endpoint.port}";
+      MainNetBitcoinCoreRpcEndPoint = "${cfg.rpc.ip}:${toString cfg.rpc.port}";
+  } // optionalAttrs (cfg.network == "testnet") {
+      Network = "TestNet";
+      TestNetBitcoinP2pEndPoint = "${cfg.endpoint.ip}:${toString cfg.endpoint.port}";
+      TestNetBitcoinCoreRpcEndPoint = "${cfg.rpc.ip}:${toString cfg.rpc.port}";
+  } // optionalAttrs (cfg.network == "regtest") {
+      Network = "RegTest";
+      RegTestBitcoinP2pEndPoint = "${cfg.endpoint.ip}:${toString cfg.endpoint.port}";
+      RegTestBitcoinCoreRpcEndPoint = "${cfg.rpc.ip}:${toString cfg.rpc.port}";
+  };
+
+	configFile = pkgs.writeText "wasabibackend.conf" (builtins.toJSON confOptions);
+
+in {
+
+  options = {
+
+    services.wasabibackend = {
+      enable = mkEnableOption "Wasabi backend service";
+
+      dataDir = mkOption {
+        type = types.path;
+        default = "/var/lib/wasabibackend";
+        description = "The data directory for the Wasabi backend node.";
+      };
+
+      customConfigFile = mkOption {
+        type = types.nullOr types.path;
+        default = null;
+        description = "Defines the path to a custom configuration file that is copied to the user's directory. Overrides any config options.";
+      };
+
+      network = mkOption {
+        type = types.enum [ "mainnet" "testnet" "regtest" ];
+        default = "mainnet";
+        description = "The network to use for the Wasabi backend service.";
+      };
+
+      endpoint = {
+        ip = mkOption {
+          type = types.str;
+          default = "127.0.0.1";
+          description = "IP address for P2P connection to bitcoind.";
+        };
+
+        port = mkOption {
+          type = types.port;
+          default = 8333;
+          description = "Port for P2P connection to bitcoind.";
+        };
+      };
+
+      rpc = {
+        ip = mkOption {
+          type = types.str;
+          default = "127.0.0.1";
+          description = "IP address for RPC connection to bitcoind.";
+        };
+
+        port = mkOption {
+          type = types.port;
+          default = 8332;
+          description = "Port for RPC connection to bitcoind.";
+        };
+
+        user = mkOption {
+          type = types.str;
+          default = "bitcoin";
+          description = "RPC user for the bitcoin endpoint.";
+        };
+
+        password = mkOption {
+          type = types.str;
+          default = "password";
+          description = "RPC password for the bitcoin endpoint. Warning: this is stored in cleartext in the Nix store! Use <literal>configFile</literal> or <literal>passwordFile</literal> if needed.";
+        };
+
+        passwordFile = mkOption {
+          type = types.nullOr types.path;
+          default = null;
+          description = "File that contains the password of the RPC user.";
+        };
+      };
+
+      user = mkOption {
+        type = types.str;
+        default = "wasabibackend";
+        description = "The user as which to run the wasabibackend node.";
+      };
+
+      group = mkOption {
+        type = types.str;
+        default = cfg.user;
+        description = "The group as which to run the wasabibackend node.";
+      };
+    };
+  };
+
+  config = mkIf cfg.enable {
+
+    systemd.tmpfiles.rules = [
+      "d '${cfg.dataDir}' 0770 '${cfg.user}' '${cfg.group}' - -"
+    ];
+
+    systemd.services.wasabibackend = {
+      description = "wasabibackend server";
+      wantedBy = [ "multi-user.target" ];
+      after = [ "network-online.target" ];
+      environment = {
+        DOTNET_PRINT_TELEMETRY_MESSAGE = "false";
+        DOTNET_CLI_TELEMETRY_OPTOUT = "true";
+      };
+      preStart = ''
+        mkdir -p ${cfg.dataDir}/.walletwasabi/backend
+        ${if cfg.customConfigFile != null then ''
+          cp -v ${cfg.customConfigFile} ${cfg.dataDir}/.walletwasabi/backend/Config.json
+        '' else ''
+          cp -v ${configFile} ${cfg.dataDir}/.walletwasabi/backend/Config.json
+          ${optionalString (cfg.rpc.passwordFile != null) ''
+            CONFIGTMP=$(mktemp)
+            cat ${cfg.dataDir}/.walletwasabi/backend/Config.json | ${pkgs.jq}/bin/jq --arg rpconnection "${cfg.rpc.user}:$(cat "${cfg.rpc.passwordFile}")" '. + { BitcoinRpcConnectionString: $rpconnection }' > $CONFIGTMP
+            mv $CONFIGTMP ${cfg.dataDir}/.walletwasabi/backend/Config.json
+          ''}
+        ''}
+        chmod ug+w ${cfg.dataDir}/.walletwasabi/backend/Config.json
+      '';
+      serviceConfig = {
+        User = cfg.user;
+        Group = cfg.group;
+        ExecStart = "${pkgs.wasabibackend}/bin/WasabiBackend";
+        ProtectSystem = "full";
+      };
+    };
+
+    users.users.${cfg.user} = {
+      name = cfg.user;
+      group = cfg.group;
+      description = "wasabibackend daemon user";
+      home = cfg.dataDir;
+      isSystemUser = true;
+    };
+
+    users.groups.${cfg.group} = {};
+
+  };
+}
diff --git a/nixpkgs/nixos/modules/services/networking/websockify.nix b/nixpkgs/nixos/modules/services/networking/websockify.nix
index d9177df65bd6..27cb47be12f7 100644
--- a/nixpkgs/nixos/modules/services/networking/websockify.nix
+++ b/nixpkgs/nixos/modules/services/networking/websockify.nix
@@ -5,12 +5,12 @@ with lib;
 let cfg = config.services.networking.websockify; in {
   options = {
     services.networking.websockify = {
-      enable = mkOption {  
+      enable = mkOption {
         description = "Whether to enable websockify to forward websocket connections to TCP connections.";
 
-        default = false;   
+        default = false;
 
-        type = types.bool; 
+        type = types.bool;
       };
 
       sslCert = mkOption {
diff --git a/nixpkgs/nixos/modules/services/networking/wg-quick.nix b/nixpkgs/nixos/modules/services/networking/wg-quick.nix
index ff1bdeed9f48..02fe40a22a10 100644
--- a/nixpkgs/nixos/modules/services/networking/wg-quick.nix
+++ b/nixpkgs/nixos/modules/services/networking/wg-quick.nix
@@ -29,7 +29,7 @@ let
         type = with types; nullOr str;
         default = null;
         description = ''
-          Base64 private key generated by wg genkey.
+          Base64 private key generated by <command>wg genkey</command>.
 
           Warning: Consider using privateKeyFile instead if you do not
           want to store the key in the world-readable Nix store.
@@ -41,7 +41,7 @@ let
         type = with types; nullOr str;
         default = null;
         description = ''
-          Private key file as generated by wg genkey.
+          Private key file as generated by <command>wg genkey</command>.
         '';
       };
 
@@ -106,9 +106,9 @@ let
         description = ''
           The kernel routing table to add this interface's
           associated routes to. Setting this is useful for e.g. policy routing
-          ("ip rule") or virtual routing and forwarding ("ip vrf"). Both numeric
-          table IDs and table names (/etc/rt_tables) can be used. Defaults to
-          "main".
+          ("ip rule") or virtual routing and forwarding ("ip vrf"). Both
+          numeric table IDs and table names (/etc/rt_tables) can be used.
+          Defaults to "main".
         '';
       };
 
@@ -139,7 +139,7 @@ let
       publicKey = mkOption {
         example = "xTIBA5rboUvnH4htodjb6e697QjLERt1NAB4mZqp8Dg=";
         type = types.str;
-        description = "The base64 public key the peer.";
+        description = "The base64 public key to the peer.";
       };
 
       presharedKey = mkOption {
@@ -147,8 +147,8 @@ let
         example = "rVXs/Ni9tu3oDBLS4hOyAUAa1qTWVA3loR8eL20os3I=";
         type = with types; nullOr str;
         description = ''
-          Base64 preshared key generated by wg genpsk. Optional,
-          and may be omitted. This option adds an additional layer of
+          Base64 preshared key generated by <command>wg genpsk</command>.
+          Optional, and may be omitted. This option adds an additional layer of
           symmetric-key cryptography to be mixed into the already existing
           public-key cryptography, for post-quantum resistance.
 
@@ -162,8 +162,8 @@ let
         example = "/private/wireguard_psk";
         type = with types; nullOr str;
         description = ''
-          File pointing to preshared key as generated by wg pensk. Optional,
-          and may be omitted. This option adds an additional layer of
+          File pointing to preshared key as generated by <command>wg genpsk</command>.
+          Optional, and may be omitted. This option adds an additional layer of
           symmetric-key cryptography to be mixed into the already existing
           public-key cryptography, for post-quantum resistance.
         '';
diff --git a/nixpkgs/nixos/modules/services/networking/wireguard.nix b/nixpkgs/nixos/modules/services/networking/wireguard.nix
index e8f83f6dd8bf..e07020349cf4 100644
--- a/nixpkgs/nixos/modules/services/networking/wireguard.nix
+++ b/nixpkgs/nixos/modules/services/networking/wireguard.nix
@@ -91,11 +91,13 @@ let
       table = mkOption {
         default = "main";
         type = types.str;
-        description = ''The kernel routing table to add this interface's
-        associated routes to. Setting this is useful for e.g. policy routing
-        ("ip rule") or virtual routing and forwarding ("ip vrf"). Both numeric
-        table IDs and table names (/etc/rt_tables) can be used. Defaults to
-        "main".'';
+        description = ''
+          The kernel routing table to add this interface's
+          associated routes to. Setting this is useful for e.g. policy routing
+          ("ip rule") or virtual routing and forwarding ("ip vrf"). Both
+          numeric table IDs and table names (/etc/rt_tables) can be used.
+          Defaults to "main".
+        '';
       };
 
       peers = mkOption {
@@ -174,7 +176,7 @@ let
         example = "/private/wireguard_psk";
         type = with types; nullOr str;
         description = ''
-          File pointing to preshared key as generated by <command>wg pensk</command>.
+          File pointing to preshared key as generated by <command>wg genpsk</command>.
           Optional, and may be omitted. This option adds an additional layer of
           symmetric-key cryptography to be mixed into the already existing
           public-key cryptography, for post-quantum resistance.
@@ -217,7 +219,6 @@ let
 
   };
 
-
   generatePathUnit = name: values:
     assert (values.privateKey == null);
     assert (values.privateKeyFile != null);
diff --git a/nixpkgs/nixos/modules/services/networking/wpa_supplicant.nix b/nixpkgs/nixos/modules/services/networking/wpa_supplicant.nix
index a7dea95056a0..395139879036 100644
--- a/nixpkgs/nixos/modules/services/networking/wpa_supplicant.nix
+++ b/nixpkgs/nixos/modules/services/networking/wpa_supplicant.nix
@@ -4,7 +4,7 @@ with lib;
 
 let
   cfg = config.networking.wireless;
-  configFile = if cfg.networks != {} then pkgs.writeText "wpa_supplicant.conf" ''
+  configFile = if cfg.networks != {} || cfg.extraConfig != "" || cfg.userControlled.enable then pkgs.writeText "wpa_supplicant.conf" ''
     ${optionalString cfg.userControlled.enable ''
       ctrl_interface=DIR=/run/wpa_supplicant GROUP=${cfg.userControlled.group}
       update_config=1''}
@@ -233,6 +233,9 @@ in {
       path = [ pkgs.wpa_supplicant ];
 
       script = ''
+        if [ -f /etc/wpa_supplicant.conf -a "/etc/wpa_supplicant.conf" != "${configFile}" ]
+        then echo >&2 "<3>/etc/wpa_supplicant.conf present but ignored. Generated ${configFile} is used instead."
+        fi
         iface_args="-s -u -D${cfg.driver} -c ${configFile}"
         ${if ifaces == [] then ''
           for i in $(cd /sys/class/net && echo *); do
diff --git a/nixpkgs/nixos/modules/services/networking/xandikos.nix b/nixpkgs/nixos/modules/services/networking/xandikos.nix
index 87c029156b9e..3c40bb956f57 100644
--- a/nixpkgs/nixos/modules/services/networking/xandikos.nix
+++ b/nixpkgs/nixos/modules/services/networking/xandikos.nix
@@ -90,7 +90,7 @@ in
   config = mkIf cfg.enable (
     mkMerge [
       {
-        meta.maintainers = [ lib.maintainers."0x4A6F" ];
+        meta.maintainers = with lib.maintainers; [ _0x4A6F ];
 
         systemd.services.xandikos = {
           description = "A Simple Calendar and Contact Server";
@@ -122,7 +122,7 @@ in
             ExecStart = ''
               ${cfg.package}/bin/xandikos \
                 --directory /var/lib/xandikos \
-                --listen_address ${cfg.address} \
+                --listen-address ${cfg.address} \
                 --port ${toString cfg.port} \
                 --route-prefix ${cfg.routePrefix} \
                 ${lib.concatStringsSep " " cfg.extraOptions}
diff --git a/nixpkgs/nixos/modules/services/networking/yggdrasil.nix b/nixpkgs/nixos/modules/services/networking/yggdrasil.nix
index 0fe9a200a1b6..a71c635c9f6e 100644
--- a/nixpkgs/nixos/modules/services/networking/yggdrasil.nix
+++ b/nixpkgs/nixos/modules/services/networking/yggdrasil.nix
@@ -195,5 +195,8 @@ in {
     # Make yggdrasilctl available on the command line.
     environment.systemPackages = [ cfg.package ];
   });
-  meta.maintainers = with lib.maintainers; [ gazally ehmry ];
+  meta = {
+    doc = ./yggdrasil.xml;
+    maintainers = with lib.maintainers; [ gazally ehmry ];
+  };
 }
diff --git a/nixpkgs/nixos/modules/services/networking/yggdrasil.xml b/nixpkgs/nixos/modules/services/networking/yggdrasil.xml
new file mode 100644
index 000000000000..c012cd4a9294
--- /dev/null
+++ b/nixpkgs/nixos/modules/services/networking/yggdrasil.xml
@@ -0,0 +1,157 @@
+<?xml version="1.0"?>
+<chapter xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xi="http://www.w3.org/2001/XInclude" version="5.0" xml:id="module-services-networking-yggdrasil">
+  <title>Yggdrasil</title>
+  <para>
+    <emphasis>Source:</emphasis>
+    <filename>modules/services/networking/yggdrasil/default.nix</filename>
+  </para>
+  <para>
+    <emphasis>Upstream documentation:</emphasis>
+    <link xlink:href="https://yggdrasil-network.github.io/"/>
+  </para>
+  <para>
+Yggdrasil is an early-stage implementation of a fully end-to-end encrypted,
+self-arranging IPv6 network.
+</para>
+  <section xml:id="module-services-networking-yggdrasil-configuration">
+    <title>Configuration</title>
+    <section xml:id="module-services-networking-yggdrasil-configuration-simple">
+      <title>Simple ephemeral node</title>
+      <para>
+An annotated example of a simple configuration:
+<programlisting>
+{
+  services.yggdrasil = {
+    enable = true;
+    persistentKeys = false;
+      # The NixOS module will generate new keys and a new IPv6 address each time
+      # it is started if persistentKeys is not enabled.
+
+    config = {
+      Peers = [
+        # Yggdrasil will automatically connect and "peer" with other nodes it
+        # discovers via link-local multicast annoucements. Unless this is the
+        # case (it probably isn't) a node needs peers within the existing
+        # network that it can tunnel to.
+        "tcp://1.2.3.4:1024"
+        "tcp://1.2.3.5:1024"
+        # Public peers can be found at
+        # https://github.com/yggdrasil-network/public-peers
+      ];
+    };
+  };
+}
+</programlisting>
+   </para>
+    </section>
+    <section xml:id="module-services-networking-yggdrasil-configuration-prefix">
+      <title>Persistent node with prefix</title>
+      <para>
+A node with a fixed address that announces a prefix:
+<programlisting>
+let
+  address = "210:5217:69c0:9afc:1b95:b9f:8718:c3d2";
+  prefix = "310:5217:69c0:9afc";
+  # taken from the output of "yggdrasilctl getself".
+in {
+
+  services.yggdrasil = {
+    enable = true;
+    persistentKeys = true; # Maintain a fixed public key and IPv6 address.
+    config = {
+      Peers = [ "tcp://1.2.3.4:1024" "tcp://1.2.3.5:1024" ];
+      NodeInfo = {
+        # This information is visible to the network.
+        name = config.networking.hostName;
+        location = "The North Pole";
+      };
+    };
+  };
+
+  boot.kernel.sysctl."net.ipv6.conf.all.forwarding" = 1;
+    # Forward traffic under the prefix.
+
+  networking.interfaces.${eth0}.ipv6.addresses = [{
+    # Set a 300::/8 address on the local physical device.
+    address = prefix + "::1";
+    prefixLength = 64;
+  }];
+
+  services.radvd = {
+    # Annouce the 300::/8 prefix to eth0.
+    enable = true;
+    config = ''
+      interface eth0
+      {
+        AdvSendAdvert on;
+        AdvDefaultLifetime 0;
+        prefix ${prefix}::/64 {
+          AdvOnLink on;
+          AdvAutonomous on;
+        };
+        route 200::/8 {};
+      };
+    '';
+  };
+}
+</programlisting>
+  </para>
+    </section>
+    <section xml:id="module-services-networking-yggdrasil-configuration-container">
+      <title>Yggdrasil attached Container</title>
+      <para>
+A NixOS container attached to the Yggdrasil network via a node running on the
+host:
+        <programlisting>
+let
+  yggPrefix64 = "310:5217:69c0:9afc";
+    # Again, taken from the output of "yggdrasilctl getself".
+in
+{
+  boot.kernel.sysctl."net.ipv6.conf.all.forwarding" = 1;
+  # Enable IPv6 forwarding.
+
+  networking = {
+    bridges.br0.interfaces = [ ];
+    # A bridge only to containers&#x2026;
+
+    interfaces.br0 = {
+      # &#x2026; configured with a prefix address.
+      ipv6.addresses = [{
+        address = "${yggPrefix64}::1";
+        prefixLength = 64;
+      }];
+    };
+  };
+
+  containers.foo = {
+    autoStart = true;
+    privateNetwork = true;
+    hostBridge = "br0";
+    # Attach the container to the bridge only.
+    config = { config, pkgs, ... }: {
+      networking.interfaces.eth0.ipv6 = {
+        addresses = [{
+          # Configure a prefix address.
+          address = "${yggPrefix64}::2";
+          prefixLength = 64;
+        }];
+        routes = [{
+          # Configure the prefix route.
+          address = "200::";
+          prefixLength = 7;
+          via = "${yggPrefix64}::1";
+        }];
+      };
+
+      services.httpd.enable = true;
+      networking.firewall.allowedTCPPorts = [ 80 ];
+    };
+  };
+
+}
+</programlisting>
+      </para>
+    </section>
+  </section>
+</chapter>
diff --git a/nixpkgs/nixos/modules/services/scheduling/chronos.nix b/nixpkgs/nixos/modules/services/scheduling/chronos.nix
deleted file mode 100644
index 9a8ed4c09ac1..000000000000
--- a/nixpkgs/nixos/modules/services/scheduling/chronos.nix
+++ /dev/null
@@ -1,54 +0,0 @@
-{ config, lib, pkgs, ... }:
-
-with lib;
-
-let
-  cfg = config.services.chronos;
-
-in {
-
-  ###### interface
-
-  options.services.chronos = {
-    enable = mkOption {
-      description = "Whether to enable graphite web frontend.";
-      default = false;
-      type = types.bool;
-    };
-
-    httpPort = mkOption {
-      description = "Chronos listening port";
-      default = 4400;
-      type = types.int;
-    };
-
-    master = mkOption {
-      description = "Chronos mesos master zookeeper address";
-      default = "zk://${head cfg.zookeeperHosts}/mesos";
-      type = types.str;
-    };
-
-    zookeeperHosts = mkOption {
-      description = "Chronos mesos zookepper addresses";
-      default = [ "localhost:2181" ];
-      type = types.listOf types.str;
-    };
-  };
-
-  ###### implementation
-
-  config = mkIf cfg.enable {
-    systemd.services.chronos = {
-      description = "Chronos Service";
-      wantedBy = [ "multi-user.target" ];
-      after = [ "network.target" "zookeeper.service" ];
-
-      serviceConfig = {
-        ExecStart = "${pkgs.chronos}/bin/chronos --master ${cfg.master} --zk_hosts ${concatStringsSep "," cfg.zookeeperHosts} --http_port ${toString cfg.httpPort}";
-        User = "chronos";
-      };
-    };
-
-    users.users.chronos.uid = config.ids.uids.chronos;
-  };
-}
diff --git a/nixpkgs/nixos/modules/services/scheduling/marathon.nix b/nixpkgs/nixos/modules/services/scheduling/marathon.nix
deleted file mode 100644
index 2e0d20c64b23..000000000000
--- a/nixpkgs/nixos/modules/services/scheduling/marathon.nix
+++ /dev/null
@@ -1,98 +0,0 @@
-{ config, lib, pkgs, ... }:
-
-with lib;
-
-let
-
-  cfg = config.services.marathon;
-
-in {
-
-  ###### interface
-
-  options.services.marathon = {
-    enable = mkOption {
-      type = types.bool;
-      default = false;
-      description = ''
-	Whether to enable the marathon mesos framework.
-      '';
-    };
-
-    master = mkOption {
-      type = types.str;
-      default = "zk://${concatStringsSep "," cfg.zookeeperHosts}/mesos";
-      example = "zk://1.2.3.4:2181,2.3.4.5:2181,3.4.5.6:2181/mesos";
-      description = ''
-	Mesos master address. See <link xlink:href="https://mesosphere.github.io/marathon/docs/"/> for details.
-      '';
-    };
-
-    zookeeperHosts = mkOption {
-      type = types.listOf types.str;
-      default = [ "localhost:2181" ];
-      example = [ "1.2.3.4:2181" "2.3.4.5:2181" "3.4.5.6:2181" ];
-      description = ''
-	ZooKeeper hosts' addresses.
-      '';
-    };
-
-    user = mkOption {
-      type = types.str;
-      default = "marathon";
-      example = "root";
-      description = ''
-	The user that the Marathon framework will be launched as. If the user doesn't exist it will be created.
-	If you want to run apps that require root access or you want to launch apps using arbitrary users, that
-	is using the `--mesos_user` flag then you need to change this to `root`.
-      '';
-    };
-
-    httpPort = mkOption {
-      type = types.int;
-      default = 8080;
-      description = ''
-	Marathon listening port for HTTP connections.
-      '';
-    };
-
-    extraCmdLineOptions = mkOption {
-      type = types.listOf types.str;
-      default = [ ];
-      example = [ "--https_port=8443" "--zk_timeout=10000" "--marathon_store_timeout=2000" ];
-      description = ''
-	Extra command line options to pass to Marathon.
-	See <link xlink:href="https://mesosphere.github.io/marathon/docs/command-line-flags.html"/> for all possible flags.
-      '';
-    };
-
-    environment = mkOption {
-      default = { };
-      type = types.attrs;
-      example = { JAVA_OPTS = "-Xmx512m"; MESOSPHERE_HTTP_CREDENTIALS = "username:password"; };
-      description = ''
-	Environment variables passed to Marathon.
-      '';
-    };
-  };
-
-  ###### implementation
-
-  config = mkIf cfg.enable {
-    systemd.services.marathon = {
-      description = "Marathon Service";
-      environment = cfg.environment;
-      wantedBy = [ "multi-user.target" ];
-      after = [ "network.target" "zookeeper.service" "mesos-master.service" "mesos-slave.service" ];
-
-      serviceConfig = {
-        ExecStart = "${pkgs.marathon}/bin/marathon --master ${cfg.master} --zk zk://${concatStringsSep "," cfg.zookeeperHosts}/marathon --http_port ${toString cfg.httpPort} ${concatStringsSep " " cfg.extraCmdLineOptions}";
-        User = cfg.user;
-        Restart = "always";
-        RestartSec = "2";
-      };
-    };
-
-    users.users.${cfg.user}.isSystemUser = true;
-  };
-}
diff --git a/nixpkgs/nixos/modules/services/security/bitwarden_rs/default.nix b/nixpkgs/nixos/modules/services/security/bitwarden_rs/default.nix
index 903a53270377..a04bc883bf0f 100644
--- a/nixpkgs/nixos/modules/services/security/bitwarden_rs/default.nix
+++ b/nixpkgs/nixos/modules/services/security/bitwarden_rs/default.nix
@@ -81,6 +81,23 @@ in {
         <link xlink:href="https://github.com/dani-garcia/bitwarden_rs/blob/${bitwarden_rs.version}/.env.template">the environment template file</link>.
       '';
     };
+
+    environmentFile = mkOption {
+      type = with types; nullOr path;
+      default = null;
+      example = "/root/bitwarden_rs.env";
+      description = ''
+        Additional environment file as defined in <citerefentry>
+        <refentrytitle>systemd.exec</refentrytitle><manvolnum>5</manvolnum>
+        </citerefentry>.
+
+        Secrets like <envar>ADMIN_TOKEN</envar> and <envar>SMTP_PASSWORD</envar>
+        may be passed to the service without adding them to the world-readable Nix store.
+
+        Note that this file needs to be available on the host on which
+        <literal>bitwarden_rs</literal> is running.
+      '';
+    };
   };
 
   config = mkIf cfg.enable {
@@ -101,7 +118,7 @@ in {
       serviceConfig = {
         User = user;
         Group = group;
-        EnvironmentFile = configFile;
+        EnvironmentFile = [ configFile ] ++ optional (cfg.environmentFile != null) cfg.environmentFile;
         ExecStart = "${bitwarden_rs}/bin/bitwarden_rs";
         LimitNOFILE = "1048576";
         LimitNPROC = "64";
diff --git a/nixpkgs/nixos/modules/services/security/haveged.nix b/nixpkgs/nixos/modules/services/security/haveged.nix
index eca529188810..22ece1883446 100644
--- a/nixpkgs/nixos/modules/services/security/haveged.nix
+++ b/nixpkgs/nixos/modules/services/security/haveged.nix
@@ -21,11 +21,11 @@ in
         type = types.bool;
         default = false;
         description = ''
-          Whether to enable to haveged entropy daemon, which refills 
+          Whether to enable to haveged entropy daemon, which refills
           /dev/random when low.
         '';
       };
-      
+
       refill_threshold = mkOption {
         type = types.int;
         default = 1024;
@@ -34,16 +34,16 @@ in
           haveged should refill the entropy pool.
         '';
       };
-      
+
     };
-    
+
   };
-  
-  
+
+
   ###### implementation
-  
+
   config = mkIf cfg.enable {
-  
+
     systemd.services.haveged =
       { description = "Entropy Harvesting Daemon";
         unitConfig.Documentation = "man:haveged(8)";
@@ -63,5 +63,5 @@ in
       };
 
   };
-  
+
 }
diff --git a/nixpkgs/nixos/modules/services/security/nginx-sso.nix b/nixpkgs/nixos/modules/services/security/nginx-sso.nix
index d792f90abe64..50d250fc4d76 100644
--- a/nixpkgs/nixos/modules/services/security/nginx-sso.nix
+++ b/nixpkgs/nixos/modules/services/security/nginx-sso.nix
@@ -4,12 +4,21 @@ with lib;
 
 let
   cfg = config.services.nginx.sso;
-  pkg = getBin pkgs.nginx-sso;
+  pkg = getBin cfg.package;
   configYml = pkgs.writeText "nginx-sso.yml" (builtins.toJSON cfg.configuration);
 in {
   options.services.nginx.sso = {
     enable = mkEnableOption "nginx-sso service";
 
+    package = mkOption {
+      type = types.package;
+      default = pkgs.nginx-sso;
+      defaultText = "pkgs.nginx-sso";
+      description = ''
+        The nginx-sso package that should be used.
+      '';
+    };
+
     configuration = mkOption {
       type = types.attrsOf types.unspecified;
       default = {};
diff --git a/nixpkgs/nixos/modules/services/security/oauth2_proxy.nix b/nixpkgs/nixos/modules/services/security/oauth2_proxy.nix
index d5c5437329ea..2f9e94bd77ba 100644
--- a/nixpkgs/nixos/modules/services/security/oauth2_proxy.nix
+++ b/nixpkgs/nixos/modules/services/security/oauth2_proxy.nix
@@ -99,7 +99,7 @@ in
 
     ##############################################
     # PROVIDER configuration
-    # Taken from: https://github.com/pusher/oauth2_proxy/blob/master/providers/providers.go
+    # Taken from: https://github.com/oauth2-proxy/oauth2-proxy/blob/master/providers/providers.go
     provider = mkOption {
       type = types.enum [
         "google"
@@ -346,7 +346,9 @@ in
         type = types.nullOr types.str;
         default = null;
         description = ''
-          An optional cookie domain to force cookies to.
+          Optional cookie domains to force cookies to (ie: `.yourcompany.com`).
+          The longest domain matching the request's host will be used (or the shortest
+          cookie domain if there is no match).
         '';
         example = ".yourcompany.com";
       };
@@ -537,7 +539,7 @@ in
     extraConfig = mkOption {
       default = {};
       description = ''
-        Extra config to pass to oauth2_proxy.
+        Extra config to pass to oauth2-proxy.
       '';
     };
 
@@ -545,7 +547,7 @@ in
       type = types.nullOr types.path;
       default = null;
       description = ''
-        oauth2_proxy allows passing sensitive configuration via environment variables.
+        oauth2-proxy allows passing sensitive configuration via environment variables.
         Make a file that contains lines like
         OAUTH2_PROXY_CLIENT_SECRET=asdfasdfasdf.apps.googleuserscontent.com
         and specify the path here.
@@ -577,7 +579,7 @@ in
       serviceConfig = {
         User = "oauth2_proxy";
         Restart = "always";
-        ExecStart = "${cfg.package}/bin/oauth2_proxy ${configString}";
+        ExecStart = "${cfg.package}/bin/oauth2-proxy ${configString}";
         EnvironmentFile = mkIf (cfg.keyFile != null) cfg.keyFile;
       };
     };
diff --git a/nixpkgs/nixos/modules/services/security/physlock.nix b/nixpkgs/nixos/modules/services/security/physlock.nix
index 690eb70079d8..da5c22a90a09 100644
--- a/nixpkgs/nixos/modules/services/security/physlock.nix
+++ b/nixpkgs/nixos/modules/services/security/physlock.nix
@@ -52,6 +52,14 @@ in
         '';
       };
 
+      lockMessage = mkOption {
+        type = types.str;
+        default = "";
+        description = ''
+          Message to show on physlock login terminal.
+        '';
+      };
+
       lockOn = {
 
         suspend = mkOption {
@@ -111,7 +119,7 @@ in
                 ++ cfg.lockOn.extraTargets;
         serviceConfig = {
           Type = "forking";
-          ExecStart = "${pkgs.physlock}/bin/physlock -d${optionalString cfg.disableSysRq "s"}";
+          ExecStart = "${pkgs.physlock}/bin/physlock -d${optionalString cfg.disableSysRq "s"}${optionalString (cfg.lockMessage != "") " -p \"${cfg.lockMessage}\""}";
         };
       };
 
diff --git a/nixpkgs/nixos/modules/services/security/privacyidea.nix b/nixpkgs/nixos/modules/services/security/privacyidea.nix
index d6abfd0e2718..c2988858e56c 100644
--- a/nixpkgs/nixos/modules/services/security/privacyidea.nix
+++ b/nixpkgs/nixos/modules/services/security/privacyidea.nix
@@ -234,7 +234,6 @@ in
           ExecStop = "${pkgs.coreutils}/bin/kill -INT $MAINPID";
           NotifyAccess = "main";
           KillSignal = "SIGQUIT";
-          StandardError = "syslog";
         };
       };
 
diff --git a/nixpkgs/nixos/modules/services/security/tor.nix b/nixpkgs/nixos/modules/services/security/tor.nix
index 18c105b2f576..38dc378887a8 100644
--- a/nixpkgs/nixos/modules/services/security/tor.nix
+++ b/nixpkgs/nixos/modules/services/security/tor.nix
@@ -34,8 +34,8 @@ let
     User tor
     DataDirectory ${torDirectory}
     ${optionalString cfg.enableGeoIP ''
-      GeoIPFile ${pkgs.tor.geoip}/share/tor/geoip
-      GeoIPv6File ${pkgs.tor.geoip}/share/tor/geoip6
+      GeoIPFile ${cfg.package.geoip}/share/tor/geoip
+      GeoIPv6File ${cfg.package.geoip}/share/tor/geoip6
     ''}
 
     ${optint "ControlPort" cfg.controlPort}
@@ -123,6 +123,16 @@ in
         '';
       };
 
+      package = mkOption {
+        type = types.package;
+        default = pkgs.tor;
+        defaultText = "pkgs.tor";
+        example = literalExample "pkgs.tor";
+        description = ''
+          Tor package to use
+        '';
+      };
+
       enableGeoIP = mkOption {
         type = types.bool;
         default = true;
@@ -159,7 +169,7 @@ in
           type = types.bool;
           default = false;
           description = ''
-            Wheter to enable Tor control socket. Control socket is created
+            Whether to enable Tor control socket. Control socket is created
             in <literal>${torRunDirectory}/control</literal>
           '';
         };
@@ -597,7 +607,7 @@ in
             ];
           }
         '';
-        type = types.loaOf (types.submodule ({name, ...}: {
+        type = types.attrsOf (types.submodule ({name, ...}: {
           options = {
 
              name = mkOption {
@@ -749,8 +759,8 @@ in
         serviceConfig =
           { Type         = "simple";
             # Translated from the upstream contrib/dist/tor.service.in
-            ExecStartPre = "${pkgs.tor}/bin/tor -f ${torRcFile} --verify-config";
-            ExecStart    = "${pkgs.tor}/bin/tor -f ${torRcFile}";
+            ExecStartPre = "${cfg.package}/bin/tor -f ${torRcFile} --verify-config";
+            ExecStart    = "${cfg.package}/bin/tor -f ${torRcFile}";
             ExecReload   = "${pkgs.coreutils}/bin/kill -HUP $MAINPID";
             KillSignal   = "SIGINT";
             TimeoutSec   = 30;
@@ -773,7 +783,7 @@ in
           };
       };
 
-    environment.systemPackages = [ pkgs.tor ];
+    environment.systemPackages = [ cfg.package ];
 
     services.privoxy = mkIf (cfg.client.enable && cfg.client.privoxy.enable) {
       enable = true;
diff --git a/nixpkgs/nixos/modules/services/security/usbguard.nix b/nixpkgs/nixos/modules/services/security/usbguard.nix
index f4118eb87fc7..16a90da52314 100644
--- a/nixpkgs/nixos/modules/services/security/usbguard.nix
+++ b/nixpkgs/nixos/modules/services/security/usbguard.nix
@@ -1,37 +1,39 @@
-{config, lib, pkgs, ... }:
+{ config, lib, pkgs, ... }:
 
 with lib;
-
 let
-
   cfg = config.services.usbguard;
 
   # valid policy options
   policy = (types.enum [ "allow" "block" "reject" "keep" "apply-policy" ]);
 
+  defaultRuleFile = "/var/lib/usbguard/rules.conf";
+
   # decide what file to use for rules
-  ruleFile = if cfg.rules != null then pkgs.writeText "usbguard-rules" cfg.rules else cfg.ruleFile;
+  ruleFile = if cfg.rules != null then pkgs.writeText "usbguard-rules" cfg.rules else defaultRuleFile;
 
   daemonConf = ''
-      # generated by nixos/modules/services/security/usbguard.nix
-      RuleFile=${ruleFile}
-      ImplicitPolicyTarget=${cfg.implictPolicyTarget}
-      PresentDevicePolicy=${cfg.presentDevicePolicy}
-      PresentControllerPolicy=${cfg.presentControllerPolicy}
-      InsertedDevicePolicy=${cfg.insertedDevicePolicy}
-      RestoreControllerDeviceState=${if cfg.restoreControllerDeviceState then "true" else "false"}
-      # this does not seem useful for endusers to change
-      DeviceManagerBackend=uevent
-      IPCAllowedUsers=${concatStringsSep " " cfg.IPCAllowedUsers}
-      IPCAllowedGroups=${concatStringsSep " " cfg.IPCAllowedGroups}
-      IPCAccessControlFiles=${cfg.IPCAccessControlFiles}
-      DeviceRulesWithPort=${if cfg.deviceRulesWithPort then "true" else "false"}
-      AuditFilePath=${cfg.auditFilePath}
-    '';
-
-    daemonConfFile = pkgs.writeText "usbguard-daemon-conf" daemonConf;
-
-in {
+    # generated by nixos/modules/services/security/usbguard.nix
+    RuleFile=${ruleFile}
+    ImplicitPolicyTarget=${cfg.implictPolicyTarget}
+    PresentDevicePolicy=${cfg.presentDevicePolicy}
+    PresentControllerPolicy=${cfg.presentControllerPolicy}
+    InsertedDevicePolicy=${cfg.insertedDevicePolicy}
+    RestoreControllerDeviceState=${if cfg.restoreControllerDeviceState then "true" else "false"}
+    # this does not seem useful for endusers to change
+    DeviceManagerBackend=uevent
+    IPCAllowedUsers=${concatStringsSep " " cfg.IPCAllowedUsers}
+    IPCAllowedGroups=${concatStringsSep " " cfg.IPCAllowedGroups}
+    IPCAccessControlFiles=/var/lib/usbguard/IPCAccessControl.d/
+    DeviceRulesWithPort=${if cfg.deviceRulesWithPort then "true" else "false"}
+    # HACK: that way audit logs still land in the journal
+    AuditFilePath=/dev/null
+  '';
+
+  daemonConfFile = pkgs.writeText "usbguard-daemon-conf" daemonConf;
+
+in
+{
 
   ###### interface
 
@@ -49,22 +51,6 @@ in {
         '';
       };
 
-      ruleFile = mkOption {
-        type = types.path;
-        default = "/var/lib/usbguard/rules.conf";
-        description = ''
-          The USBGuard daemon will use this file to load the policy rule set
-          from it and to write new rules received via the IPC interface.
-
-          Running the command <literal>usbguard generate-policy</literal> as
-          root will generate a config for your currently plugged in devices.
-          For a in depth guide consult the official documentation.
-
-          Setting the <literal>rules</literal> option will ignore the
-          <literal>ruleFile</literal> option.
-        '';
-      };
-
       rules = mkOption {
         type = types.nullOr types.lines;
         default = null;
@@ -72,16 +58,20 @@ in {
           allow with-interface equals { 08:*:* }
         '';
         description = ''
-          The USBGuard daemon will load this policy rule set. Modifying it via
-          the IPC interface won't work if you use this option, since the
-          contents of this option will be written into the nix-store it will be
-          read-only.
+          The USBGuard daemon will load this as the policy rule set.
+          As these rules are NixOS managed they are immutable and can't
+          be changed by the IPC interface.
+
+          If you do not set this option, the USBGuard daemon will load
+          it's policy rule set from <literal>${defaultRuleFile}</literal>.
+          This file can be changed manually or via the IPC interface.
 
-          You can still use <literal> usbguard generate-policy</literal> to
-          generate rules, but you would have to insert them here.
+          Running <literal>usbguard generate-policy</literal> as root will
+          generate a config for your currently plugged in devices.
 
-          Setting the <literal>rules</literal> option will ignore the
-          <literal>ruleFile</literal> option.
+          For more details see <citerefentry>
+          <refentrytitle>usbguard-rules.conf</refentrytitle>
+          <manvolnum>5</manvolnum></citerefentry>.
         '';
       };
 
@@ -155,17 +145,6 @@ in {
         '';
       };
 
-      IPCAccessControlFiles = mkOption {
-        type = types.path;
-        default = "/var/lib/usbguard/IPCAccessControl.d/";
-        description = ''
-          The files at this location will be interpreted by the daemon as IPC
-          access control definition files. See the IPC ACCESS CONTROL section
-          in <citerefentry><refentrytitle>usbguard-daemon.conf</refentrytitle>
-          <manvolnum>5</manvolnum></citerefentry> for more details.
-        '';
-      };
-
       deviceRulesWithPort = mkOption {
         type = types.bool;
         default = false;
@@ -173,14 +152,6 @@ in {
           Generate device specific rules including the "via-port" attribute.
         '';
       };
-
-      auditFilePath = mkOption {
-        type = types.path;
-        default = "/var/log/usbguard/usbguard-audit.log";
-        description = ''
-          USBGuard audit events log file path.
-        '';
-      };
     };
   };
 
@@ -197,17 +168,19 @@ in {
       wantedBy = [ "basic.target" ];
       wants = [ "systemd-udevd.service" ];
 
-      # make sure an empty rule file and required directories exist
-      preStart = ''
-        mkdir -p $(dirname "${cfg.ruleFile}") $(dirname "${cfg.auditFilePath}") "${cfg.IPCAccessControlFiles}" \
-          && ([ -f "${cfg.ruleFile}" ] || touch ${cfg.ruleFile})
-      '';
+      # make sure an empty rule file exists
+      preStart = ''[ -f "${ruleFile}" ] || touch ${ruleFile}'';
 
       serviceConfig = {
         Type = "simple";
         ExecStart = ''${cfg.package}/bin/usbguard-daemon -P -k -c ${daemonConfFile}'';
         Restart = "on-failure";
 
+        StateDirectory = [
+          "usbguard"
+          "usbguard/IPCAccessControl.d"
+        ];
+
         AmbientCapabilities = "";
         CapabilityBoundingSet = "CAP_CHOWN CAP_FOWNER";
         DeviceAllow = "/dev/null rw";
@@ -223,8 +196,8 @@ in {
         ProtectKernelModules = true;
         ProtectSystem = true;
         ReadOnlyPaths = "-/";
-        ReadWritePaths = "-/dev/shm -${dirOf cfg.auditFilePath} -/tmp -${dirOf cfg.ruleFile}";
-        RestrictAddressFamilies = "AF_UNIX AF_NETLINK";
+        ReadWritePaths = "-/dev/shm -/tmp";
+        RestrictAddressFamilies = [ "AF_UNIX" "AF_NETLINK" ];
         RestrictNamespaces = true;
         RestrictRealtime = true;
         SystemCallArchitectures = "native";
@@ -233,4 +206,9 @@ in {
       };
     };
   };
+  imports = [
+    (mkRemovedOptionModule [ "services" "usbguard" "ruleFile" ] "The usbguard module now uses ${defaultRuleFile} as ruleFile. Alternatively, use services.usbguard.rules to configure rules.")
+    (mkRemovedOptionModule [ "services" "usbguard" "IPCAccessControlFiles" ] "The usbguard module now hardcodes IPCAccessControlFiles to /var/lib/usbguard/IPCAccessControl.d.")
+    (mkRemovedOptionModule [ "services" "usbguard" "auditFilePath" ] "Removed usbguard module audit log files. Audit logs can be found in the systemd journal.")
+  ];
 }
diff --git a/nixpkgs/nixos/modules/services/security/yubikey-agent.nix b/nixpkgs/nixos/modules/services/security/yubikey-agent.nix
new file mode 100644
index 000000000000..2972c64a3641
--- /dev/null
+++ b/nixpkgs/nixos/modules/services/security/yubikey-agent.nix
@@ -0,0 +1,60 @@
+# Global configuration for yubikey-agent.
+
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.services.yubikey-agent;
+
+  # reuse the pinentryFlavor option from the gnupg module
+  pinentryFlavor = config.programs.gnupg.agent.pinentryFlavor;
+in
+{
+  ###### interface
+
+  meta.maintainers = with maintainers; [ philandstuff rawkode ];
+
+  options = {
+
+    services.yubikey-agent = {
+      enable = mkOption {
+        type = types.bool;
+        default = false;
+        description = ''
+          Whether to start yubikey-agent when you log in.  Also sets
+          SSH_AUTH_SOCK to point at yubikey-agent.
+
+          Note that yubikey-agent will use whatever pinentry is
+          specified in programs.gnupg.agent.pinentryFlavor.
+        '';
+      };
+
+      package = mkOption {
+        type = types.package;
+        default = pkgs.yubikey-agent;
+        defaultText = "pkgs.yubikey-agent";
+        description = ''
+          The package used for the yubikey-agent daemon.
+        '';
+      };
+    };
+  };
+
+  config = mkIf cfg.enable {
+    environment.systemPackages = [ cfg.package ];
+    systemd.packages = [ cfg.package ];
+
+    # This overrides the systemd user unit shipped with the
+    # yubikey-agent package
+    systemd.user.services.yubikey-agent = mkIf (pinentryFlavor != null) {
+      path = [ pkgs.pinentry.${pinentryFlavor} ];
+    };
+
+    environment.extraInit = ''
+      if [ -z "$SSH_AUTH_SOCK" -a -n "$XDG_RUNTIME_DIR" ]; then
+        export SSH_AUTH_SOCK="$XDG_RUNTIME_DIR/yubikey-agent/yubikey-agent.sock"
+      fi
+    '';
+  };
+}
diff --git a/nixpkgs/nixos/modules/services/system/earlyoom.nix b/nixpkgs/nixos/modules/services/system/earlyoom.nix
index c6a001d30eeb..e29bdbe264cc 100644
--- a/nixpkgs/nixos/modules/services/system/earlyoom.nix
+++ b/nixpkgs/nixos/modules/services/system/earlyoom.nix
@@ -106,7 +106,6 @@ in
       path = optional ecfg.enableNotifications pkgs.dbus;
       serviceConfig = {
         StandardOutput = "null";
-        StandardError = "syslog";
         ExecStart = ''
           ${pkgs.earlyoom}/bin/earlyoom \
           -m ${toString ecfg.freeMemThreshold} \
diff --git a/nixpkgs/nixos/modules/services/torrent/transmission.nix b/nixpkgs/nixos/modules/services/torrent/transmission.nix
index 1bfcf2de82f8..014a22bb5a8d 100644
--- a/nixpkgs/nixos/modules/services/torrent/transmission.nix
+++ b/nixpkgs/nixos/modules/services/torrent/transmission.nix
@@ -1,52 +1,54 @@
-{ config, lib, pkgs, ... }:
+{ config, lib, pkgs, options, ... }:
 
 with lib;
 
 let
   cfg = config.services.transmission;
+  inherit (config.environment) etc;
   apparmor = config.security.apparmor.enable;
-
-  homeDir = cfg.home;
-  downloadDirPermissions = cfg.downloadDirPermissions;
-  downloadDir = "${homeDir}/Downloads";
-  incompleteDir = "${homeDir}/.incomplete";
-
-  settingsDir = "${homeDir}/config";
-  settingsFile = pkgs.writeText "settings.json" (builtins.toJSON fullSettings);
-
-  # for users in group "transmission" to have access to torrents
-  fullSettings = { umask = 2; download-dir = downloadDir; incomplete-dir = incompleteDir; } // cfg.settings;
-
-  preStart = pkgs.writeScript "transmission-pre-start" ''
-    #!${pkgs.runtimeShell}
-    set -ex
-    cp -f ${settingsFile} ${settingsDir}/settings.json
-  '';
+  rootDir = "/run/transmission";
+  homeDir = "/var/lib/transmission";
+  settingsDir = ".config/transmission-daemon";
+  downloadsDir = "Downloads";
+  incompleteDir = ".incomplete";
+  watchDir = "watchdir";
+  # TODO: switch to configGen.json once RFC0042 is implemented
+  settingsFile = pkgs.writeText "settings.json" (builtins.toJSON cfg.settings);
 in
 {
   options = {
     services.transmission = {
-      enable = mkOption {
-        type = types.bool;
-        default = false;
-        description = ''
-          Whether or not to enable the headless Transmission BitTorrent daemon.
+      enable = mkEnableOption ''the headless Transmission BitTorrent daemon.
 
-          Transmission daemon can be controlled via the RPC interface using
-          transmission-remote or the WebUI (http://localhost:9091/ by default).
+        Transmission daemon can be controlled via the RPC interface using
+        transmission-remote, the WebUI (http://127.0.0.1:9091/ by default),
+        or other clients like stig or tremc.
 
-          Torrents are downloaded to ${downloadDir} by default and are
-          accessible to users in the "transmission" group.
-        '';
-      };
+        Torrents are downloaded to ${homeDir}/${downloadsDir} by default and are
+        accessible to users in the "transmission" group'';
 
-      settings = mkOption {
+      settings = mkOption rec {
+        # TODO: switch to types.config.json as prescribed by RFC0042 once it's implemented
         type = types.attrs;
+        apply = recursiveUpdate default;
         default =
           {
-            download-dir = downloadDir;
-            incomplete-dir = incompleteDir;
+            download-dir = "${cfg.home}/${downloadsDir}";
+            incomplete-dir = "${cfg.home}/${incompleteDir}";
             incomplete-dir-enabled = true;
+            watch-dir = "${cfg.home}/${watchDir}";
+            watch-dir-enabled = false;
+            message-level = 1;
+            peer-port = 51413;
+            peer-port-random-high = 65535;
+            peer-port-random-low = 49152;
+            peer-port-random-on-start = false;
+            rpc-bind-address = "127.0.0.1";
+            rpc-port = 9091;
+            script-torrent-done-enabled = false;
+            script-torrent-done-filename = "";
+            umask = 2; # 0o002 in decimal as expected by Transmission
+            utp-enabled = true;
           };
         example =
           {
@@ -56,11 +58,12 @@ in
             rpc-whitelist = "127.0.0.1,192.168.*.*";
           };
         description = ''
-          Attribute set whos fields overwrites fields in settings.json (each
-          time the service starts). String values must be quoted, integer and
+          Attribute set whose fields overwrites fields in
+          <literal>.config/transmission-daemon/settings.json</literal>
+          (each time the service starts). String values must be quoted, integer and
           boolean values must not.
 
-          See https://github.com/transmission/transmission/wiki/Editing-Configuration-Files
+          See <link xlink:href="https://github.com/transmission/transmission/wiki/Editing-Configuration-Files">Transmission's Wiki</link>
           for documentation.
         '';
       };
@@ -70,22 +73,32 @@ in
         default = "770";
         example = "775";
         description = ''
-          The permissions to set for download-dir and incomplete-dir.
-          They will be applied on every service start.
+          The permissions set by <literal>systemd.activationScripts.transmission-daemon</literal>
+          on the directories <link linkend="opt-services.transmission.settings">settings.download-dir</link>
+          and <link linkend="opt-services.transmission.settings">settings.incomplete-dir</link>.
+          Note that you may also want to change
+          <link linkend="opt-services.transmission.settings">settings.umask</link>.
         '';
       };
 
       port = mkOption {
-        type = types.int;
-        default = 9091;
-        description = "TCP port number to run the RPC/web interface.";
+        type = types.port;
+        description = ''
+          TCP port number to run the RPC/web interface.
+
+          If instead you want to change the peer port,
+          use <link linkend="opt-services.transmission.settings">settings.peer-port</link>
+          or <link linkend="opt-services.transmission.settings">settings.peer-port-random-on-start</link>.
+        '';
       };
 
       home = mkOption {
         type = types.path;
-        default = "/var/lib/transmission";
+        default = homeDir;
         description = ''
-          The directory where transmission will create files.
+          The directory where Transmission will create <literal>${settingsDir}</literal>.
+          as well as <literal>${downloadsDir}/</literal> unless <link linkend="opt-services.transmission.settings">settings.download-dir</link> is changed,
+          and <literal>${incompleteDir}/</literal> unless <link linkend="opt-services.transmission.settings">settings.incomplete-dir</link> is changed.
         '';
       };
 
@@ -100,32 +113,179 @@ in
         default = "transmission";
         description = "Group account under which Transmission runs.";
       };
+
+      credentialsFile = mkOption {
+        type = types.path;
+        description = ''
+          Path to a JSON file to be merged with the settings.
+          Useful to merge a file which is better kept out of the Nix store
+          because it contains sensible data like <link linkend="opt-services.transmission.settings">settings.rpc-password</link>.
+        '';
+        default = "/dev/null";
+        example = "/var/lib/secrets/transmission/settings.json";
+      };
+
+      openFirewall = mkEnableOption "opening of the peer port(s) in the firewall";
+
+      performanceNetParameters = mkEnableOption ''tweaking of kernel parameters
+        to open many more connections at the same time.
+
+        Note that you may also want to increase
+        <link linkend="opt-services.transmission.settings">settings.peer-limit-global</link>.
+        And be aware that these settings are quite aggressive
+        and might not suite your regular desktop use.
+        For instance, SSH sessions may time out more easily'';
     };
   };
 
   config = mkIf cfg.enable {
-    systemd.tmpfiles.rules = [
-      "d '${homeDir}' 0770 '${cfg.user}' '${cfg.group}' - -"
-      "d '${settingsDir}' 0700 '${cfg.user}' '${cfg.group}' - -"
-      "d '${fullSettings.download-dir}' '${downloadDirPermissions}' '${cfg.user}' '${cfg.group}' - -"
-      "d '${fullSettings.incomplete-dir}' '${downloadDirPermissions}' '${cfg.user}' '${cfg.group}' - -"
+    # Note that using systemd.tmpfiles would not work here
+    # because it would fail when creating a directory
+    # with a different owner than its parent directory, by saying:
+    # Detected unsafe path transition /home/foo → /home/foo/Downloads during canonicalization of /home/foo/Downloads
+    # when /home/foo is not owned by cfg.user.
+    # Note also that using an ExecStartPre= wouldn't work either
+    # because BindPaths= needs these directories before.
+    system.activationScripts.transmission-daemon = ''
+      install -d -m 700 '${cfg.home}/${settingsDir}'
+      chown -R '${cfg.user}:${cfg.group}' ${cfg.home}/${settingsDir}
+      install -d -m '${cfg.downloadDirPermissions}' -o '${cfg.user}' -g '${cfg.group}' '${cfg.settings.download-dir}'
+      '' + optionalString cfg.settings.incomplete-dir-enabled ''
+      install -d -m '${cfg.downloadDirPermissions}' -o '${cfg.user}' -g '${cfg.group}' '${cfg.settings.incomplete-dir}'
+      '';
+
+    assertions = [
+      { assertion = builtins.match "^/.*" cfg.home != null;
+        message = "`services.transmission.home' must be an absolute path.";
+      }
+      { assertion = types.path.check cfg.settings.download-dir;
+        message = "`services.transmission.settings.download-dir' must be an absolute path.";
+      }
+      { assertion = types.path.check cfg.settings.incomplete-dir;
+        message = "`services.transmission.settings.incomplete-dir' must be an absolute path.";
+      }
+      { assertion = types.path.check cfg.settings.watch-dir;
+        message = "`services.transmission.settings.watch-dir' must be an absolute path.";
+      }
+      { assertion = cfg.settings.script-torrent-done-filename == "" || types.path.check cfg.settings.script-torrent-done-filename;
+        message = "`services.transmission.settings.script-torrent-done-filename' must be an absolute path.";
+      }
+      { assertion = types.port.check cfg.settings.rpc-port;
+        message = "${toString cfg.settings.rpc-port} is not a valid port number for `services.transmission.settings.rpc-port`.";
+      }
+      # In case both port and settings.rpc-port are explicitely defined: they must be the same.
+      { assertion = !options.services.transmission.port.isDefined || cfg.port == cfg.settings.rpc-port;
+        message = "`services.transmission.port' is not equal to `services.transmission.settings.rpc-port'";
+      }
     ];
 
+    services.transmission.settings =
+      optionalAttrs options.services.transmission.port.isDefined { rpc-port = cfg.port; };
+
     systemd.services.transmission = {
       description = "Transmission BitTorrent Service";
       after = [ "network.target" ] ++ optional apparmor "apparmor.service";
-      requires = mkIf apparmor [ "apparmor.service" ];
+      requires = optional apparmor "apparmor.service";
       wantedBy = [ "multi-user.target" ];
+      environment.CURL_CA_BUNDLE = etc."ssl/certs/ca-certificates.crt".source;
 
-      # 1) Only the "transmission" user and group have access to torrents.
-      # 2) Optionally update/force specific fields into the configuration file.
-      serviceConfig.ExecStartPre = preStart;
-      serviceConfig.ExecStart = "${pkgs.transmission}/bin/transmission-daemon -f --port ${toString config.services.transmission.port} --config-dir ${settingsDir}";
-      serviceConfig.ExecReload = "${pkgs.coreutils}/bin/kill -HUP $MAINPID";
-      serviceConfig.User = cfg.user;
-      serviceConfig.Group = cfg.group;
-      # NOTE: transmission has an internal umask that also must be set (in settings.json)
-      serviceConfig.UMask = "0002";
+      serviceConfig = {
+        # Use "+" because credentialsFile may not be accessible to User= or Group=.
+        ExecStartPre = [("+" + pkgs.writeShellScript "transmission-prestart" ''
+          set -eu${lib.optionalString (cfg.settings.message-level >= 3) "x"}
+          ${pkgs.jq}/bin/jq --slurp add ${settingsFile} '${cfg.credentialsFile}' |
+          install -D -m 600 -o '${cfg.user}' -g '${cfg.group}' /dev/stdin \
+           '${cfg.home}/${settingsDir}/settings.json'
+        '')];
+        ExecStart="${pkgs.transmission}/bin/transmission-daemon -f";
+        ExecReload = "${pkgs.coreutils}/bin/kill -HUP $MAINPID";
+        User = cfg.user;
+        Group = cfg.group;
+        # Create rootDir in the host's mount namespace.
+        RuntimeDirectory = [(baseNameOf rootDir)];
+        RuntimeDirectoryMode = "755";
+        # Avoid mounting rootDir in the own rootDir of ExecStart='s mount namespace.
+        InaccessiblePaths = ["-+${rootDir}"];
+        # This is for BindPaths= and BindReadOnlyPaths=
+        # to allow traversal of directories they create in RootDirectory=.
+        UMask = "0066";
+        # Using RootDirectory= makes it possible
+        # to use the same paths download-dir/incomplete-dir
+        # (which appear in user's interfaces) without requiring cfg.user
+        # to have access to their parent directories,
+        # by using BindPaths=/BindReadOnlyPaths=.
+        # Note that TemporaryFileSystem= could have been used instead
+        # but not without adding some BindPaths=/BindReadOnlyPaths=
+        # that would only be needed for ExecStartPre=,
+        # because RootDirectoryStartOnly=true would not help.
+        RootDirectory = rootDir;
+        RootDirectoryStartOnly = true;
+        MountAPIVFS = true;
+        BindPaths =
+          [ "${cfg.home}/${settingsDir}"
+            cfg.settings.download-dir
+          ] ++
+          optional cfg.settings.incomplete-dir-enabled
+            cfg.settings.incomplete-dir
+          ++
+          optional cfg.settings.watch-dir-enabled
+            cfg.settings.watch-dir
+          ;
+        BindReadOnlyPaths = [
+          # No confinement done of /nix/store here like in systemd-confinement.nix,
+          # an AppArmor profile is provided to get a confinement based upon paths and rights.
+          builtins.storeDir
+          "/etc"
+          ] ++
+          optional (cfg.settings.script-torrent-done-enabled &&
+                    cfg.settings.script-torrent-done-filename != "")
+            cfg.settings.script-torrent-done-filename;
+        # The following options are only for optimizing:
+        # systemd-analyze security transmission
+        AmbientCapabilities = "";
+        CapabilityBoundingSet = "";
+        # ProtectClock= adds DeviceAllow=char-rtc r
+        DeviceAllow = "";
+        LockPersonality = true;
+        MemoryDenyWriteExecute = true;
+        NoNewPrivileges = true;
+        PrivateDevices = true;
+        PrivateMounts = true;
+        PrivateNetwork = mkDefault false;
+        PrivateTmp = true;
+        PrivateUsers = true;
+        ProtectClock = true;
+        ProtectControlGroups = true;
+        # ProtectHome=true would not allow BindPaths= to work accross /home,
+        # and ProtectHome=tmpfs would break statfs(),
+        # preventing transmission-daemon to report the available free space.
+        # However, RootDirectory= is used, so this is not a security concern
+        # since there would be nothing in /home but any BindPaths= wanted by the user.
+        ProtectHome = "read-only";
+        ProtectHostname = true;
+        ProtectKernelLogs = true;
+        ProtectKernelModules = true;
+        ProtectKernelTunables = true;
+        ProtectSystem = "strict";
+        RemoveIPC = true;
+        # AF_UNIX may become usable one day:
+        # https://github.com/transmission/transmission/issues/441
+        RestrictAddressFamilies = [ "AF_UNIX" "AF_INET" "AF_INET6" ];
+        RestrictNamespaces = true;
+        RestrictRealtime = true;
+        RestrictSUIDSGID = true;
+        SystemCallFilter = [
+          "@system-service"
+          # Groups in @system-service which do not contain a syscall
+          # listed by perf stat -e 'syscalls:sys_enter_*' transmission-daemon -f
+          # in tests, and seem likely not necessary for transmission-daemon.
+          "~@aio" "~@chown" "~@keyring" "~@memlock" "~@resources" "~@setuid" "~@timer"
+          # In the @privileged group, but reached when querying infos through RPC (eg. with stig).
+          "quotactl"
+        ];
+        SystemCallArchitectures = "native";
+        SystemCallErrorNumber = "EPERM";
+      };
     };
 
     # It's useful to have transmission in path, e.g. for remote control
@@ -133,70 +293,159 @@ in
 
     users.users = optionalAttrs (cfg.user == "transmission") ({
       transmission = {
-        name = "transmission";
         group = cfg.group;
         uid = config.ids.uids.transmission;
         description = "Transmission BitTorrent user";
-        home = homeDir;
-        createHome = true;
+        home = cfg.home;
       };
     });
 
     users.groups = optionalAttrs (cfg.group == "transmission") ({
       transmission = {
-        name = "transmission";
         gid = config.ids.gids.transmission;
       };
     });
 
-    # AppArmor profile
+    networking.firewall = mkIf cfg.openFirewall (
+      if cfg.settings.peer-port-random-on-start
+      then
+        { allowedTCPPortRanges =
+            [ { from = cfg.settings.peer-port-random-low;
+                to   = cfg.settings.peer-port-random-high;
+              }
+            ];
+          allowedUDPPortRanges =
+            [ { from = cfg.settings.peer-port-random-low;
+                to   = cfg.settings.peer-port-random-high;
+              }
+            ];
+        }
+      else
+        { allowedTCPPorts = [ cfg.settings.peer-port ];
+          allowedUDPPorts = [ cfg.settings.peer-port ];
+        }
+    );
+
+    boot.kernel.sysctl = mkMerge [
+      # Transmission uses a single UDP socket in order to implement multiple uTP sockets,
+      # and thus expects large kernel buffers for the UDP socket,
+      # https://trac.transmissionbt.com/browser/trunk/libtransmission/tr-udp.c?rev=11956.
+      # at least up to the values hardcoded here:
+      (mkIf cfg.settings.utp-enabled {
+        "net.core.rmem_max" = mkDefault "4194304"; # 4MB
+        "net.core.wmem_max" = mkDefault "1048576"; # 1MB
+      })
+      (mkIf cfg.performanceNetParameters {
+        # Increase the number of available source (local) TCP and UDP ports to 49151.
+        # Usual default is 32768 60999, ie. 28231 ports.
+        # Find out your current usage with: ss -s
+        "net.ipv4.ip_local_port_range" = "16384 65535";
+        # Timeout faster generic TCP states.
+        # Usual default is 600.
+        # Find out your current usage with: watch -n 1 netstat -nptuo
+        "net.netfilter.nf_conntrack_generic_timeout" = 60;
+        # Timeout faster established but inactive connections.
+        # Usual default is 432000.
+        "net.netfilter.nf_conntrack_tcp_timeout_established" = 600;
+        # Clear immediately TCP states after timeout.
+        # Usual default is 120.
+        "net.netfilter.nf_conntrack_tcp_timeout_time_wait" = 1;
+        # Increase the number of trackable connections.
+        # Usual default is 262144.
+        # Find out your current usage with: conntrack -C
+        "net.netfilter.nf_conntrack_max" = 1048576;
+      })
+    ];
+
     security.apparmor.profiles = mkIf apparmor [
       (pkgs.writeText "apparmor-transmission-daemon" ''
-        #include <tunables/global>
+        include <tunables/global>
 
         ${pkgs.transmission}/bin/transmission-daemon {
-          #include <abstractions/base>
-          #include <abstractions/nameservice>
-
-          ${getLib pkgs.glibc}/lib/*.so                    mr,
-          ${getLib pkgs.libevent}/lib/libevent*.so*        mr,
-          ${getLib pkgs.curl}/lib/libcurl*.so*             mr,
-          ${getLib pkgs.openssl}/lib/libssl*.so*           mr,
-          ${getLib pkgs.openssl}/lib/libcrypto*.so*        mr,
-          ${getLib pkgs.zlib}/lib/libz*.so*                mr,
-          ${getLib pkgs.libssh2}/lib/libssh2*.so*          mr,
-          ${getLib pkgs.systemd}/lib/libsystemd*.so*       mr,
-          ${getLib pkgs.xz}/lib/liblzma*.so*               mr,
-          ${getLib pkgs.libgcrypt}/lib/libgcrypt*.so*      mr,
-          ${getLib pkgs.libgpgerror}/lib/libgpg-error*.so* mr,
-          ${getLib pkgs.nghttp2}/lib/libnghttp2*.so*       mr,
-          ${getLib pkgs.c-ares}/lib/libcares*.so*          mr,
-          ${getLib pkgs.libcap}/lib/libcap*.so*            mr,
-          ${getLib pkgs.attr}/lib/libattr*.so*             mr,
-          ${getLib pkgs.lz4}/lib/liblz4*.so*               mr,
-          ${getLib pkgs.libkrb5}/lib/lib*.so*              mr,
-          ${getLib pkgs.keyutils}/lib/libkeyutils*.so*     mr,
-          ${getLib pkgs.utillinuxMinimal.out}/lib/libblkid.so.* mr,
-          ${getLib pkgs.utillinuxMinimal.out}/lib/libmount.so.* mr,
-          ${getLib pkgs.utillinuxMinimal.out}/lib/libuuid.so.* mr,
-          ${getLib pkgs.gcc.cc.lib}/lib/libstdc++.so.* mr,
-          ${getLib pkgs.gcc.cc.lib}/lib/libgcc_s.so.* mr,
-
-          @{PROC}/sys/kernel/random/uuid   r,
-          @{PROC}/sys/vm/overcommit_memory r,
-
-          ${pkgs.openssl.out}/etc/**                     r,
-          ${pkgs.transmission}/share/transmission/** r,
-
-          owner ${settingsDir}/** rw,
-
-          ${fullSettings.download-dir}/** rw,
-          ${optionalString fullSettings.incomplete-dir-enabled ''
-            ${fullSettings.incomplete-dir}/** rw,
+          include <abstractions/base>
+          include <abstractions/nameservice>
+
+          # NOTE: https://github.com/NixOS/nixpkgs/pull/93457
+          # will remove the need for these by fixing <abstractions/base>
+          r ${etc."hosts".source},
+          r /etc/ld-nix.so.preload,
+          ${lib.optionalString (builtins.hasAttr "ld-nix.so.preload" etc) ''
+            r ${etc."ld-nix.so.preload".source},
+            ${concatMapStrings (p: optionalString (p != "") ("mr ${p},\n"))
+              (splitString "\n" config.environment.etc."ld-nix.so.preload".text)}
           ''}
+          r ${etc."ssl/certs/ca-certificates.crt".source},
+          r ${pkgs.tzdata}/share/zoneinfo/**,
+          r ${pkgs.stdenv.cc.libc}/share/i18n/**,
+          r ${pkgs.stdenv.cc.libc}/share/locale/**,
+
+          mr ${getLib pkgs.stdenv.cc.cc}/lib/*.so*,
+          mr ${getLib pkgs.stdenv.cc.libc}/lib/*.so*,
+          mr ${getLib pkgs.attr}/lib/libattr*.so*,
+          mr ${getLib pkgs.c-ares}/lib/libcares*.so*,
+          mr ${getLib pkgs.curl}/lib/libcurl*.so*,
+          mr ${getLib pkgs.keyutils}/lib/libkeyutils*.so*,
+          mr ${getLib pkgs.libcap}/lib/libcap*.so*,
+          mr ${getLib pkgs.libevent}/lib/libevent*.so*,
+          mr ${getLib pkgs.libgcrypt}/lib/libgcrypt*.so*,
+          mr ${getLib pkgs.libgpgerror}/lib/libgpg-error*.so*,
+          mr ${getLib pkgs.libkrb5}/lib/lib*.so*,
+          mr ${getLib pkgs.libssh2}/lib/libssh2*.so*,
+          mr ${getLib pkgs.lz4}/lib/liblz4*.so*,
+          mr ${getLib pkgs.nghttp2}/lib/libnghttp2*.so*,
+          mr ${getLib pkgs.openssl}/lib/libcrypto*.so*,
+          mr ${getLib pkgs.openssl}/lib/libssl*.so*,
+          mr ${getLib pkgs.systemd}/lib/libsystemd*.so*,
+          mr ${getLib pkgs.utillinuxMinimal.out}/lib/libblkid.so*,
+          mr ${getLib pkgs.utillinuxMinimal.out}/lib/libmount.so*,
+          mr ${getLib pkgs.utillinuxMinimal.out}/lib/libuuid.so*,
+          mr ${getLib pkgs.xz}/lib/liblzma*.so*,
+          mr ${getLib pkgs.zlib}/lib/libz*.so*,
+
+          r @{PROC}/sys/kernel/random/uuid,
+          r @{PROC}/sys/vm/overcommit_memory,
+          # @{pid} is not a kernel variable yet but a regexp
+          #r @{PROC}/@{pid}/environ,
+          r @{PROC}/@{pid}/mounts,
+          rwk /tmp/tr_session_id_*,
+
+          r ${pkgs.openssl.out}/etc/**,
+          r ${config.systemd.services.transmission.environment.CURL_CA_BUNDLE},
+          r ${pkgs.transmission}/share/transmission/**,
+
+          owner rw ${cfg.home}/${settingsDir}/**,
+          rw ${cfg.settings.download-dir}/**,
+          ${optionalString cfg.settings.incomplete-dir-enabled ''
+            rw ${cfg.settings.incomplete-dir}/**,
+          ''}
+          ${optionalString cfg.settings.watch-dir-enabled ''
+            rw ${cfg.settings.watch-dir}/**,
+          ''}
+          profile dirs {
+            rw ${cfg.settings.download-dir}/**,
+            ${optionalString cfg.settings.incomplete-dir-enabled ''
+              rw ${cfg.settings.incomplete-dir}/**,
+            ''}
+            ${optionalString cfg.settings.watch-dir-enabled ''
+              rw ${cfg.settings.watch-dir}/**,
+            ''}
+          }
+
+          ${optionalString (cfg.settings.script-torrent-done-enabled &&
+                            cfg.settings.script-torrent-done-filename != "") ''
+            # Stack transmission_directories profile on top of
+            # any existing profile for script-torrent-done-filename
+            # FIXME: to be tested as I'm not sure it works well with NoNewPrivileges=
+            # https://gitlab.com/apparmor/apparmor/-/wikis/AppArmorStacking#seccomp-and-no_new_privs
+            px ${cfg.settings.script-torrent-done-filename} -> &@{dirs},
+          ''}
+
+          # FIXME: enable customizing using https://github.com/NixOS/nixpkgs/pull/93457
+          # include <local/transmission-daemon>
         }
       '')
     ];
   };
 
+  meta.maintainers = with lib.maintainers; [ julm ];
 }
diff --git a/nixpkgs/nixos/modules/services/video/epgstation/default.nix b/nixpkgs/nixos/modules/services/video/epgstation/default.nix
new file mode 100644
index 000000000000..8d6d431fa55a
--- /dev/null
+++ b/nixpkgs/nixos/modules/services/video/epgstation/default.nix
@@ -0,0 +1,295 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.services.epgstation;
+
+  username = config.users.users.epgstation.name;
+  groupname = config.users.users.epgstation.group;
+
+  settingsFmt = pkgs.formats.json {};
+  settingsTemplate = settingsFmt.generate "config.json" cfg.settings;
+  preStartScript = pkgs.writeScript "epgstation-prestart" ''
+    #!${pkgs.runtimeShell}
+
+    PASSWORD="$(head -n1 "${cfg.basicAuth.passwordFile}")"
+    DB_PASSWORD="$(head -n1 "${cfg.database.passwordFile}")"
+
+    # setup configuration
+    touch /etc/epgstation/config.json
+    chmod 640 /etc/epgstation/config.json
+    sed \
+      -e "s,@password@,$PASSWORD,g" \
+      -e "s,@dbPassword@,$DB_PASSWORD,g" \
+      ${settingsTemplate} > /etc/epgstation/config.json
+    chown "${username}:${groupname}" /etc/epgstation/config.json
+
+    # NOTE: Use password authentication, since mysqljs does not yet support auth_socket
+    if [ ! -e /var/lib/epgstation/db-created ]; then
+      ${pkgs.mysql}/bin/mysql -e \
+        "GRANT ALL ON \`${cfg.database.name}\`.* TO '${username}'@'localhost' IDENTIFIED by '$DB_PASSWORD';"
+      touch /var/lib/epgstation/db-created
+    fi
+  '';
+
+  streamingConfig = builtins.fromJSON (builtins.readFile ./streaming.json);
+  logConfig = {
+    appenders.stdout.type = "stdout";
+    categories = {
+      default = { appenders = [ "stdout" ]; level = "info"; };
+      system = { appenders = [ "stdout" ]; level = "info"; };
+      access = { appenders = [ "stdout" ]; level = "info"; };
+      stream = { appenders = [ "stdout" ]; level = "info"; };
+    };
+  };
+
+  defaultPassword = "INSECURE_GO_CHECK_CONFIGURATION_NIX\n";
+in
+{
+  options.services.epgstation = {
+    enable = mkEnableOption pkgs.epgstation.meta.description;
+
+    usePreconfiguredStreaming = mkOption {
+      type = types.bool;
+      default = true;
+      description = ''
+        Use preconfigured default streaming options.
+
+        Upstream defaults:
+        <link xlink:href="https://github.com/l3tnun/EPGStation/blob/master/config/config.sample.json"/>
+      '';
+    };
+
+    port = mkOption {
+      type = types.port;
+      default = 20772;
+      description = ''
+        HTTP port for EPGStation to listen on.
+      '';
+    };
+
+    socketioPort = mkOption {
+      type = types.port;
+      default = cfg.port + 1;
+      description = ''
+        Socket.io port for EPGStation to listen on.
+      '';
+    };
+
+    clientSocketioPort = mkOption {
+      type = types.port;
+      default = cfg.socketioPort;
+      description = ''
+        Socket.io port that the web client is going to connect to. This may be
+        different from <option>socketioPort</option> if EPGStation is hidden
+        behind a reverse proxy.
+      '';
+    };
+
+    openFirewall = mkOption {
+      type = types.bool;
+      default = false;
+      description = ''
+        Open ports in the firewall for the EPGStation web interface.
+
+        <warning>
+          <para>
+            Exposing EPGStation to the open internet is generally advised
+            against. Only use it inside a trusted local network, or consider
+            putting it behind a VPN if you want remote access.
+          </para>
+        </warning>
+      '';
+    };
+
+    basicAuth = {
+      user = mkOption {
+        type = with types; nullOr str;
+        default = null;
+        example = "epgstation";
+        description = ''
+          Basic auth username for EPGStation. If <literal>null</literal>, basic
+          auth will be disabled.
+
+          <warning>
+            <para>
+              Basic authentication has known weaknesses, the most critical being
+              that it sends passwords over the network in clear text. Use this
+              feature to control access to EPGStation within your family and
+              friends, but don't rely on it for security.
+            </para>
+          </warning>
+        '';
+      };
+
+      passwordFile = mkOption {
+        type = types.path;
+        default = pkgs.writeText "epgstation-password" defaultPassword;
+        example = "/run/keys/epgstation-password";
+        description = ''
+          A file containing the password for <option>basicAuth.user</option>.
+        '';
+      };
+    };
+
+    database =  {
+      name = mkOption {
+        type = types.str;
+        default = "epgstation";
+        description = ''
+          Name of the MySQL database that holds EPGStation's data.
+        '';
+      };
+
+      passwordFile = mkOption {
+        type = types.path;
+        default = pkgs.writeText "epgstation-db-password" defaultPassword;
+        example = "/run/keys/epgstation-db-password";
+        description = ''
+          A file containing the password for the database named
+          <option>database.name</option>.
+        '';
+      };
+    };
+
+    settings = mkOption {
+      description = ''
+        Options to add to config.json.
+
+        Documentation:
+        <link xlink:href="https://github.com/l3tnun/EPGStation/blob/master/doc/conf-manual.md"/>
+      '';
+
+      default = {};
+      example = {
+        recPriority = 20;
+        conflictPriority = 10;
+      };
+
+      type = types.submodule {
+        freeformType = settingsFmt.type;
+
+        options.readOnlyOnce = mkOption {
+          type = types.bool;
+          default = false;
+          description = "Don't reload configuration files at runtime.";
+        };
+
+        options.mirakurunPath = mkOption (let
+          sockPath = config.services.mirakurun.unixSocket;
+        in {
+          type = types.str;
+          default = "http+unix://${replaceStrings ["/"] ["%2F"] sockPath}";
+          example = "http://localhost:40772";
+          description = "URL to connect to Mirakurun.";
+        });
+
+        options.encode = mkOption {
+          type = with types; listOf attrs;
+          description = "Encoding presets for recorded videos.";
+          default = [
+            { name = "H264";
+              cmd = "${pkgs.epgstation}/libexec/enc.sh main";
+              suffix = ".mp4";
+              default = true; }
+            { name = "H264-sub";
+              cmd = "${pkgs.epgstation}/libexec/enc.sh sub";
+              suffix = "-sub.mp4"; }
+          ];
+        };
+      };
+    };
+  };
+
+  config = mkIf cfg.enable {
+    environment.etc = {
+      "epgstation/operatorLogConfig.json".text = builtins.toJSON logConfig;
+      "epgstation/serviceLogConfig.json".text = builtins.toJSON logConfig;
+    };
+
+    networking.firewall = mkIf cfg.openFirewall {
+      allowedTCPPorts = with cfg; [ port socketioPort ];
+    };
+
+    users.users.epgstation = {
+      description = "EPGStation user";
+      group = config.users.groups.epgstation.name;
+      isSystemUser = true;
+    };
+
+    users.groups.epgstation = {};
+
+    services.mirakurun.enable = mkDefault true;
+
+    services.mysql = {
+      enable = mkDefault true;
+      package = mkDefault pkgs.mysql;
+      ensureDatabases = [ cfg.database.name ];
+      # FIXME: enable once mysqljs supports auth_socket
+      # ensureUsers = [ {
+      #   name = username;
+      #   ensurePermissions = { "${cfg.database.name}.*" = "ALL PRIVILEGES"; };
+      # } ];
+    };
+
+    services.epgstation.settings = let
+      defaultSettings = {
+        serverPort = cfg.port;
+        socketioPort = cfg.socketioPort;
+        clientSocketioPort = cfg.clientSocketioPort;
+
+        dbType = mkDefault "mysql";
+        mysql = {
+          user = username;
+          database = cfg.database.name;
+          socketPath = mkDefault "/run/mysqld/mysqld.sock";
+          password = mkDefault "@dbPassword@";
+          connectTimeout = mkDefault 1000;
+          connectionLimit = mkDefault 10;
+        };
+
+        basicAuth = mkIf (cfg.basicAuth.user != null) {
+          user = mkDefault cfg.basicAuth.user;
+          password = mkDefault "@password@";
+        };
+
+        ffmpeg = mkDefault "${pkgs.ffmpeg-full}/bin/ffmpeg";
+        ffprobe = mkDefault "${pkgs.ffmpeg-full}/bin/ffprobe";
+
+        fileExtension = mkDefault ".m2ts";
+        maxEncode = mkDefault 2;
+        maxStreaming = mkDefault 2;
+      };
+    in
+    mkMerge [
+      defaultSettings
+      (mkIf cfg.usePreconfiguredStreaming streamingConfig)
+    ];
+
+    systemd.tmpfiles.rules = [
+      "d '/var/lib/epgstation/streamfiles' - ${username} ${groupname} - -"
+      "d '/var/lib/epgstation/recorded' - ${username} ${groupname} - -"
+      "d '/var/lib/epgstation/thumbnail' - ${username} ${groupname} - -"
+    ];
+
+    systemd.services.epgstation = {
+      description = pkgs.epgstation.meta.description;
+      wantedBy = [ "multi-user.target" ];
+      after = [
+        "network.target"
+      ] ++ optional config.services.mirakurun.enable "mirakurun.service"
+        ++ optional config.services.mysql.enable "mysql.service";
+
+      serviceConfig = {
+        ExecStart = "${pkgs.epgstation}/bin/epgstation start";
+        ExecStartPre = "+${preStartScript}";
+        User = username;
+        Group = groupname;
+        StateDirectory = "epgstation";
+        LogsDirectory = "epgstation";
+        ConfigurationDirectory = "epgstation";
+      };
+    };
+  };
+}
diff --git a/nixpkgs/nixos/modules/services/video/epgstation/generate b/nixpkgs/nixos/modules/services/video/epgstation/generate
new file mode 100755
index 000000000000..2940768b6d2c
--- /dev/null
+++ b/nixpkgs/nixos/modules/services/video/epgstation/generate
@@ -0,0 +1,31 @@
+#!/usr/bin/env -S nix-build --no-out-link
+
+# Script to generate default streaming configurations for EPGStation. There's
+# no need to run this script directly since generate.sh in the EPGStation
+# package directory would run this script for you.
+#
+# Usage: ./generate | xargs cat > streaming.json
+
+{ pkgs ? (import ../../../../.. {}) }:
+
+let
+  sampleConfigPath = "${pkgs.epgstation.src}/config/config.sample.json";
+  sampleConfig = builtins.fromJSON (builtins.readFile sampleConfigPath);
+  streamingConfig = {
+    inherit (sampleConfig)
+      mpegTsStreaming
+      mpegTsViewer
+      liveHLS
+      liveMP4
+      liveWebM
+      recordedDownloader
+      recordedStreaming
+      recordedViewer
+      recordedHLS;
+  };
+in
+pkgs.runCommand "streaming.json" { nativeBuildInputs = [ pkgs.jq ]; } ''
+  jq . <<<'${builtins.toJSON streamingConfig}' > $out
+''
+
+# vim:set ft=nix:
diff --git a/nixpkgs/nixos/modules/services/video/epgstation/streaming.json b/nixpkgs/nixos/modules/services/video/epgstation/streaming.json
new file mode 100644
index 000000000000..37957f6cb6a2
--- /dev/null
+++ b/nixpkgs/nixos/modules/services/video/epgstation/streaming.json
@@ -0,0 +1,119 @@
+{
+  "liveHLS": [
+    {
+      "cmd": "%FFMPEG% -re -dual_mono_mode main -i pipe:0 -sn -threads 0 -map 0 -ignore_unknown -max_muxing_queue_size 1024 -f hls -hls_time 3 -hls_list_size 17 -hls_allow_cache 1 -hls_segment_filename %streamFileDir%/stream%streamNum%-%09d.ts -c:a aac -ar 48000 -b:a 192k -ac 2 -c:v libx264 -vf yadif,scale=-2:720 -b:v 3000k -preset veryfast -flags +loop-global_header %OUTPUT%",
+      "name": "720p"
+    },
+    {
+      "cmd": "%FFMPEG% -re -dual_mono_mode main -i pipe:0 -sn -threads 0 -map 0 -ignore_unknown -max_muxing_queue_size 1024 -f hls -hls_time 3 -hls_list_size 17 -hls_allow_cache 1 -hls_segment_filename %streamFileDir%/stream%streamNum%-%09d.ts -c:a aac -ar 48000 -b:a 128k -ac 2 -c:v libx264 -vf yadif,scale=-2:480 -b:v 1500k -preset veryfast -flags +loop-global_header %OUTPUT%",
+      "name": "480p"
+    },
+    {
+      "cmd": "%FFMPEG% -re -dual_mono_mode main -i pipe:0 -sn -threads 0 -map 0 -ignore_unknown -max_muxing_queue_size 1024 -f hls -hls_time 3 -hls_list_size 17 -hls_allow_cache 1 -hls_segment_filename %streamFileDir%/stream%streamNum%-%09d.ts -c:a aac -ar 48000 -b:a 48k -ac 2 -c:v libx264 -vf yadif,scale=-2:180 -b:v 100k -preset veryfast -maxrate 110k -bufsize 1000k -flags +loop-global_header %OUTPUT%",
+      "name": "180p"
+    }
+  ],
+  "liveMP4": [
+    {
+      "cmd": "%FFMPEG% -re -dual_mono_mode main -i pipe:0 -sn -threads 0 -c:a aac -ar 48000 -b:a 192k -ac 2 -c:v libx264 -vf yadif,scale=-2:720 -b:v 3000k -profile:v baseline -preset veryfast -tune fastdecode,zerolatency -movflags frag_keyframe+empty_moov+faststart+default_base_moof -y -f mp4 pipe:1",
+      "name": "720p"
+    },
+    {
+      "cmd": "%FFMPEG% -re -dual_mono_mode main -i pipe:0 -sn -threads 0 -c:a aac -ar 48000 -b:a 128k -ac 2 -c:v libx264 -vf yadif,scale=-2:480 -b:v 1500k -profile:v baseline -preset veryfast -tune fastdecode,zerolatency -movflags frag_keyframe+empty_moov+faststart+default_base_moof -y -f mp4 pipe:1",
+      "name": "480p"
+    }
+  ],
+  "liveWebM": [
+    {
+      "cmd": "%FFMPEG% -re -dual_mono_mode main -i pipe:0 -sn -threads 3 -c:a libvorbis -ar 48000 -b:a 192k -ac 2 -c:v libvpx-vp9 -vf yadif,scale=-2:720 -b:v 3000k -deadline realtime -speed 4 -cpu-used -8 -y -f webm pipe:1",
+      "name": "720p"
+    },
+    {
+      "cmd": "%FFMPEG% -re -dual_mono_mode main -i pipe:0 -sn -threads 2 -c:a libvorbis -ar 48000 -b:a 128k -ac 2 -c:v libvpx-vp9 -vf yadif,scale=-2:480 -b:v 1500k -deadline realtime -speed 4 -cpu-used -8 -y -f webm pipe:1",
+      "name": "480p"
+    }
+  ],
+  "mpegTsStreaming": [
+    {
+      "cmd": "%FFMPEG% -re -dual_mono_mode main -i pipe:0 -sn -threads 0 -c:a aac -ar 48000 -b:a 192k -ac 2 -c:v libx264 -vf yadif,scale=-2:720 -b:v 3000k -preset veryfast -y -f mpegts pipe:1",
+      "name": "720p"
+    },
+    {
+      "cmd": "%FFMPEG% -re -dual_mono_mode main -i pipe:0 -sn -threads 0 -c:a aac -ar 48000 -b:a 128k -ac 2 -c:v libx264 -vf yadif,scale=-2:480 -b:v 1500k -preset veryfast -y -f mpegts pipe:1",
+      "name": "480p"
+    },
+    {
+      "name": "Original"
+    }
+  ],
+  "mpegTsViewer": {
+    "android": "intent://ADDRESS#Intent;package=com.mxtech.videoplayer.ad;type=video;scheme=http;end",
+    "ios": "vlc-x-callback://x-callback-url/stream?url=http://ADDRESS"
+  },
+  "recordedDownloader": {
+    "android": "intent://ADDRESS#Intent;package=com.dv.adm;type=video;scheme=http;end",
+    "ios": "vlc-x-callback://x-callback-url/download?url=http://ADDRESS&filename=FILENAME"
+  },
+  "recordedHLS": [
+    {
+      "cmd": "%FFMPEG% -dual_mono_mode main -i %INPUT% -sn -threads 0 -map 0 -ignore_unknown -max_muxing_queue_size 1024 -f hls -hls_time 3 -hls_list_size 0 -hls_allow_cache 1 -hls_segment_filename %streamFileDir%/stream%streamNum%-%09d.ts -c:a aac -ar 48000 -b:a 192k -ac 2 -c:v libx264 -vf yadif,scale=-2:720 -b:v 3000k -preset veryfast -flags +loop-global_header %OUTPUT%",
+      "name": "720p"
+    },
+    {
+      "cmd": "%FFMPEG% -dual_mono_mode main -i %INPUT% -sn -threads 0 -map 0 -ignore_unknown -max_muxing_queue_size 1024 -f hls -hls_time 3 -hls_list_size 0 -hls_allow_cache 1 -hls_segment_filename %streamFileDir%/stream%streamNum%-%09d.ts -c:a aac -ar 48000 -b:a 128k -ac 2 -c:v libx264 -vf yadif,scale=-2:480 -b:v 1500k -preset veryfast -flags +loop-global_header %OUTPUT%",
+      "name": "480p"
+    },
+    {
+      "cmd": "%FFMPEG% -dual_mono_mode main -i %INPUT% -sn -map 0 -ignore_unknown -max_muxing_queue_size 1024 -f hls -hls_time 3 -hls_list_size 0 -hls_allow_cache 1 -hls_segment_type fmp4 -hls_fmp4_init_filename stream%streamNum%-init.mp4 -hls_segment_filename stream%streamNum%-%09d.m4s -c:a aac -ar 48000 -b:a 128k -ac 2 -c:v libx265 -vf yadif,scale=-2:480 -b:v 350k -preset veryfast -tag:v hvc1 %OUTPUT%",
+      "name": "480p(h265)"
+    }
+  ],
+  "recordedStreaming": {
+    "mp4": [
+      {
+        "ab": "192k",
+        "cmd": "%FFMPEG% -dual_mono_mode main %RE% -i pipe:0 -sn -threads 0 -c:a aac -ar 48000 -ac 2 -c:v libx264 -vf yadif,scale=-2:720 %VB% %VBUFFER% %AB% %ABUFFER% -profile:v baseline -preset veryfast -tune fastdecode,zerolatency -movflags frag_keyframe+empty_moov+faststart+default_base_moof -y -f mp4 pipe:1",
+        "name": "720p",
+        "vb": "3000k"
+      },
+      {
+        "ab": "128k",
+        "cmd": "%FFMPEG% -dual_mono_mode main %RE% -i pipe:0 -sn -threads 0 -c:a aac -ar 48000 -ac 2 -c:v libx264 -vf yadif,scale=-2:360 %VB% %VBUFFER% %AB% %ABUFFER% -profile:v baseline -preset veryfast -tune fastdecode,zerolatency -movflags frag_keyframe+empty_moov+faststart+default_base_moof -y -f mp4 pipe:1",
+        "name": "360p",
+        "vb": "1500k"
+      }
+    ],
+    "mpegTs": [
+      {
+        "ab": "192k",
+        "cmd": "%FFMPEG% -dual_mono_mode main %RE% -i pipe:0 -sn -threads 0 -c:a aac -ar 48000 -ac 2 -c:v libx264 -vf yadif,scale=-2:720 %VB% %VBUFFER% %AB% %ABUFFER% -profile:v baseline -preset veryfast -tune fastdecode,zerolatency -y -f mpegts pipe:1",
+        "name": "720p (H.264)",
+        "vb": "3000k"
+      },
+      {
+        "ab": "128k",
+        "cmd": "%FFMPEG% -dual_mono_mode main %RE% -i pipe:0 -sn -threads 0 -c:a aac -ar 48000 -ac 2 -c:v libx264 -vf yadif,scale=-2:360 %VB% %VBUFFER% %AB% %ABUFFER% -profile:v baseline -preset veryfast -tune fastdecode,zerolatency -y -f mpegts pipe:1",
+        "name": "360p (H.264)",
+        "vb": "1500k"
+      }
+    ],
+    "webm": [
+      {
+        "ab": "192k",
+        "cmd": "%FFMPEG% -dual_mono_mode main %RE% -i pipe:0 -sn -threads 3 -c:a libvorbis -ar 48000 -ac 2 -c:v libvpx-vp9 -vf yadif,scale=-2:720 %VB% %VBUFFER% %AB% %ABUFFER% -deadline realtime -speed 4 -cpu-used -8 -y -f webm pipe:1",
+        "name": "720p",
+        "vb": "3000k"
+      },
+      {
+        "ab": "128k",
+        "cmd": "%FFMPEG% -dual_mono_mode main %RE% -i pipe:0 -sn -threads 2 -c:a libvorbis -ar 48000 -ac 2 -c:v libvpx-vp9 -vf yadif,scale=-2:360 %VB% %VBUFFER% %AB% %ABUFFER% -deadline realtime -speed 4 -cpu-used -8 -y -f webm pipe:1",
+        "name": "360p",
+        "vb": "1500k"
+      }
+    ]
+  },
+  "recordedViewer": {
+    "android": "intent://ADDRESS#Intent;package=com.mxtech.videoplayer.ad;type=video;scheme=http;end",
+    "ios": "infuse://x-callback-url/play?url=http://ADDRESS"
+  }
+}
diff --git a/nixpkgs/nixos/modules/services/video/mirakurun.nix b/nixpkgs/nixos/modules/services/video/mirakurun.nix
new file mode 100644
index 000000000000..ce1dabe6bfa1
--- /dev/null
+++ b/nixpkgs/nixos/modules/services/video/mirakurun.nix
@@ -0,0 +1,183 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.services.mirakurun;
+  mirakurun = pkgs.mirakurun;
+  username = config.users.users.mirakurun.name;
+  groupname = config.users.users.mirakurun.group;
+  settingsFmt = pkgs.formats.yaml {};
+in
+  {
+    options = {
+      services.mirakurun = {
+        enable = mkEnableOption mirakurun.meta.description;
+
+        port = mkOption {
+          type = with types; nullOr port;
+          default = 40772;
+          description = ''
+            Port to listen on. If <literal>null</literal>, it won't listen on
+            any port.
+          '';
+        };
+
+        openFirewall = mkOption {
+          type = types.bool;
+          default = false;
+          description = ''
+            Open ports in the firewall for Mirakurun.
+
+            <warning>
+              <para>
+                Exposing Mirakurun to the open internet is generally advised
+                against. Only use it inside a trusted local network, or
+                consider putting it behind a VPN if you want remote access.
+              </para>
+            </warning>
+          '';
+        };
+
+        unixSocket = mkOption {
+          type = with types; nullOr path;
+          default = "/var/run/mirakurun/mirakurun.sock";
+          description = ''
+            Path to unix socket to listen on. If <literal>null</literal>, it
+            won't listen on any unix sockets.
+          '';
+        };
+
+        serverSettings = mkOption {
+          type = settingsFmt.type;
+          default = {};
+          example = literalExample ''
+            {
+              highWaterMark = 25165824;
+              overflowTimeLimit = 30000;
+            };
+          '';
+          description = ''
+            Options for server.yml.
+
+            Documentation:
+            <link xlink:href="https://github.com/Chinachu/Mirakurun/blob/master/doc/Configuration.md"/>
+          '';
+        };
+
+        tunerSettings = mkOption {
+          type = with types; nullOr settingsFmt.type;
+          default = null;
+          example = literalExample ''
+            [
+              {
+                name = "tuner-name";
+                types = [ "GR" "BS" "CS" "SKY" ];
+                dvbDevicePath = "/dev/dvb/adapterX/dvrX";
+              }
+            ];
+          '';
+          description = ''
+            Options which are added to tuners.yml. If none is specified, it will
+            automatically be generated at runtime.
+
+            Documentation:
+            <link xlink:href="https://github.com/Chinachu/Mirakurun/blob/master/doc/Configuration.md"/>
+          '';
+        };
+
+        channelSettings = mkOption {
+          type = with types; nullOr settingsFmt.type;
+          default = null;
+          example = literalExample ''
+            [
+              {
+                name = "channel";
+                types = "GR";
+                channel = "0";
+              }
+            ];
+          '';
+          description = ''
+            Options which are added to channels.yml. If none is specified, it
+            will automatically be generated at runtime.
+
+            Documentation:
+            <link xlink:href="https://github.com/Chinachu/Mirakurun/blob/master/doc/Configuration.md"/>
+          '';
+        };
+      };
+    };
+
+    config = mkIf cfg.enable {
+      environment.systemPackages = [ mirakurun ];
+      environment.etc = {
+        "mirakurun/server.yml".source = settingsFmt.generate "server.yml" cfg.serverSettings;
+        "mirakurun/tuners.yml" = mkIf (cfg.tunerSettings != null) {
+          source = settingsFmt.generate "tuners.yml" cfg.tunerSettings;
+          mode = "0644";
+          user = username;
+          group = groupname;
+        };
+        "mirakurun/channels.yml" = mkIf (cfg.channelSettings != null) {
+          source = settingsFmt.generate "channels.yml" cfg.channelSettings;
+          mode = "0644";
+          user = username;
+          group = groupname;
+        };
+      };
+
+      networking.firewall = mkIf cfg.openFirewall {
+        allowedTCPPorts = mkIf (cfg.port != null) [ cfg.port ];
+      };
+
+      users.users.mirakurun = {
+        description = "Mirakurun user";
+        group = "video";
+        isSystemUser = true;
+      };
+
+      services.mirakurun.serverSettings = {
+        logLevel = mkDefault 2;
+        path = mkIf (cfg.unixSocket != null) cfg.unixSocket;
+        port = mkIf (cfg.port != null) cfg.port;
+      };
+
+      systemd.tmpfiles.rules = [
+        "d '/etc/mirakurun' - ${username} ${groupname} - -"
+      ];
+
+      systemd.services.mirakurun = {
+        description = mirakurun.meta.description;
+        wantedBy = [ "multi-user.target" ];
+        after = [ "network.target" ];
+        serviceConfig = {
+          ExecStart = "${mirakurun}/bin/mirakurun";
+          User = username;
+          Group = groupname;
+          RuntimeDirectory="mirakurun";
+          StateDirectory="mirakurun";
+          Nice = -10;
+          IOSchedulingClass = "realtime";
+          IOSchedulingPriority = 7;
+        };
+
+        environment = {
+          SERVER_CONFIG_PATH = "/etc/mirakurun/server.yml";
+          TUNERS_CONFIG_PATH = "/etc/mirakurun/tuners.yml";
+          CHANNELS_CONFIG_PATH = "/etc/mirakurun/channels.yml";
+          SERVICES_DB_PATH = "/var/lib/mirakurun/services.json";
+          PROGRAMS_DB_PATH = "/var/lib/mirakurun/programs.json";
+          NODE_ENV = "production";
+        };
+
+        restartTriggers = let
+          getconf = target: config.environment.etc."mirakurun/${target}.yml".source;
+          targets = [
+            "server"
+          ] ++ optional (cfg.tunerSettings != null) "tuners"
+            ++ optional (cfg.channelSettings != null) "channels";
+        in (map getconf targets);
+      };
+    };
+  }
diff --git a/nixpkgs/nixos/modules/services/wayland/cage.nix b/nixpkgs/nixos/modules/services/wayland/cage.nix
index c59ca9983a6c..14d84c4ce0f9 100644
--- a/nixpkgs/nixos/modules/services/wayland/cage.nix
+++ b/nixpkgs/nixos/modules/services/wayland/cage.nix
@@ -73,8 +73,6 @@ in {
         TTYVTDisallocate = "yes";
         # Fail to start if not controlling the virtual terminal.
         StandardInput = "tty-fail";
-        StandardOutput = "syslog";
-        StandardError = "syslog";
         # Set up a full (custom) user session for the user, required by Cage.
         PAMName = "cage";
       };
@@ -84,6 +82,7 @@ in {
       auth    required pam_unix.so nullok
       account required pam_unix.so
       session required pam_unix.so
+      session required pam_env.so conffile=${config.system.build.pamEnvironment} readenv=0
       session required ${pkgs.systemd}/lib/security/pam_systemd.so
     '';
 
diff --git a/nixpkgs/nixos/modules/services/web-apps/codimd.nix b/nixpkgs/nixos/modules/services/web-apps/codimd.nix
index 751f81649ddb..c787c36b877c 100644
--- a/nixpkgs/nixos/modules/services/web-apps/codimd.nix
+++ b/nixpkgs/nixos/modules/services/web-apps/codimd.nix
@@ -93,7 +93,7 @@ in
           type = types.bool;
           default = true;
           description = ''
-            Wheter to enable HSTS if HTTPS is also enabled.
+            Whether to enable HSTS if HTTPS is also enabled.
           '';
         };
         maxAgeSeconds = mkOption {
@@ -385,7 +385,7 @@ in
         type = types.bool;
         default = true;
         description = ''
-          Wether to enable email registration.
+          Whether to enable email registration.
         '';
       };
       allowGravatar = mkOption {
@@ -877,6 +877,37 @@ in
         description = "Configure the SAML integration.";
       };
     };
+
+
+    environmentFile = mkOption {
+      type = with types; nullOr path;
+      default = null;
+      example = "/var/lib/codimd/codimd.env";
+      description = ''
+        Environment file as defined in <citerefentry>
+        <refentrytitle>systemd.exec</refentrytitle><manvolnum>5</manvolnum>
+        </citerefentry>.
+
+        Secrets may be passed to the service without adding them to the world-readable
+        Nix store, by specifying placeholder variables as the option value in Nix and
+        setting these variables accordingly in the environment file.
+
+        <programlisting>
+          # snippet of CodiMD-related config
+          services.codimd.configuration.dbURL = "postgres://codimd:\''${DB_PASSWORD}@db-host:5432/codimddb";
+          services.codimd.configuration.minio.secretKey = "$MINIO_SECRET_KEY";
+        </programlisting>
+
+        <programlisting>
+          # content of the environment file
+          DB_PASSWORD=verysecretdbpassword
+          MINIO_SECRET_KEY=verysecretminiokey
+        </programlisting>
+
+        Note that this file needs to be available on the host on which
+        <literal>CodiMD</literal> is running.
+      '';
+    };
   };
 
   config = mkIf cfg.enable {
@@ -900,11 +931,17 @@ in
       description = "CodiMD Service";
       wantedBy = [ "multi-user.target" ];
       after = [ "networking.target" ];
+      preStart = ''
+        ${pkgs.envsubst}/bin/envsubst \
+          -o ${cfg.workDir}/config.json \
+          -i ${prettyJSON cfg.configuration}
+      '';
       serviceConfig = {
         WorkingDirectory = cfg.workDir;
         ExecStart = "${pkgs.codimd}/bin/codimd";
+        EnvironmentFile = mkIf (cfg.environmentFile != null) [ cfg.environmentFile ];
         Environment = [
-          "CMD_CONFIG_FILE=${prettyJSON cfg.configuration}"
+          "CMD_CONFIG_FILE=${cfg.workDir}/config.json"
           "NODE_ENV=production"
         ];
         Restart = "always";
diff --git a/nixpkgs/nixos/modules/services/web-apps/convos.nix b/nixpkgs/nixos/modules/services/web-apps/convos.nix
new file mode 100644
index 000000000000..8be11eec9f31
--- /dev/null
+++ b/nixpkgs/nixos/modules/services/web-apps/convos.nix
@@ -0,0 +1,72 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.services.convos;
+in
+{
+  options.services.convos = {
+    enable = mkEnableOption "Convos";
+    listenPort = mkOption {
+      type = types.port;
+      default = 3000;
+      example = 8080;
+      description = "Port the web interface should listen on";
+    };
+    listenAddress = mkOption {
+      type = types.str;
+      default = "*";
+      example = "127.0.0.1";
+      description = "Address or host the web interface should listen on";
+    };
+    reverseProxy = mkOption {
+      type = types.bool;
+      default = false;
+      description = ''
+        Enables reverse proxy support. This will allow Convos to automatically
+        pick up the <literal>X-Forwarded-For</literal> and
+        <literal>X-Request-Base</literal> HTTP headers set in your reverse proxy
+        web server. Note that enabling this option without a reverse proxy in
+        front will be a security issue.
+      '';
+    };
+  };
+  config = mkIf cfg.enable {
+    systemd.services.convos = {
+      description = "Convos Service";
+      wantedBy = [ "multi-user.target" ];
+      after = [ "networking.target" ];
+      environment = {
+        CONVOS_HOME = "%S/convos";
+        CONVOS_REVERSE_PROXY = if cfg.reverseProxy then "1" else "0";
+        MOJO_LISTEN = "http://${toString cfg.listenAddress}:${toString cfg.listenPort}";
+      };
+      serviceConfig = {
+        ExecStart = "${pkgs.convos}/bin/convos daemon";
+        Restart = "on-failure";
+        StateDirectory = "convos";
+        WorkingDirectory = "%S/convos";
+        DynamicUser = true;
+        MemoryDenyWriteExecute = true;
+        ProtectHome = true;
+        ProtectClock = true;
+        ProtectHostname = true;
+        ProtectKernelTunables = true;
+        ProtectKernelModules = true;
+        ProtectKernelLogs = true;
+        ProtectControlGroups = true;
+        PrivateDevices = true;
+        PrivateMounts = true;
+        PrivateUsers = true;
+        LockPersonality = true;
+        RestrictRealtime = true;
+        RestrictNamespaces = true;
+        RestrictAddressFamilies = [ "AF_INET" "AF_INET6"];
+        SystemCallFilter = "@system-service";
+        SystemCallArchitectures = "native";
+        CapabilityBoundingSet = "";
+      };
+    };
+  };
+}
diff --git a/nixpkgs/nixos/modules/services/web-apps/dokuwiki.nix b/nixpkgs/nixos/modules/services/web-apps/dokuwiki.nix
index 33a828fa2cb3..d9ebb3a98808 100644
--- a/nixpkgs/nixos/modules/services/web-apps/dokuwiki.nix
+++ b/nixpkgs/nixos/modules/services/web-apps/dokuwiki.nix
@@ -2,7 +2,7 @@
 
 let
 
-  inherit (lib) mkEnableOption mkForce mkIf mkMerge mkOption optionalAttrs recursiveUpdate types;
+  inherit (lib) mkEnableOption mkForce mkIf mkMerge mkOption optionalAttrs recursiveUpdate types maintainers;
   inherit (lib) concatMapStringsSep flatten mapAttrs mapAttrs' mapAttrsToList nameValuePair concatMapStringSep;
 
   eachSite = config.services.dokuwiki;
@@ -95,7 +95,7 @@ let
 
       aclFile = mkOption {
         type = with types; nullOr str;
-        default = if (config.aclUse && config.acl == null) then "/var/lib/dokuwiki/${name}/users.auth.php" else null;
+        default = if (config.aclUse && config.acl == null) then "/var/lib/dokuwiki/${name}/acl.auth.php" else null;
         description = ''
           Location of the dokuwiki acl rules. Mutually exclusive with services.dokuwiki.acl
           Mutually exclusive with services.dokuwiki.acl which is preferred.
@@ -249,22 +249,19 @@ let
       nginx = mkOption {
         type = types.submodule (
           recursiveUpdate
-            (import ../web-servers/nginx/vhost-options.nix { inherit config lib; })
-            {
-              # Enable encryption by default,
-              options.forceSSL.default = true;
-              options.enableACME.default = true;
-            }
+            (import ../web-servers/nginx/vhost-options.nix { inherit config lib; }) {}
         );
-        default = {forceSSL = true; enableACME = true;};
+        default = {};
         example = {
           serverAliases = [
             "wiki.\${config.networking.domain}"
           ];
-          enableACME = false;
+          # To enable encryption and let let's encrypt take care of certificate
+          forceSSL = true;
+          enableACME = true;
         };
         description = ''
-          With this option, you can customize the nginx virtualHost which already has sensible defaults for DokuWiki.
+          With this option, you can customize the nginx virtualHost settings.
         '';
       };
     };
@@ -276,7 +273,7 @@ in
     services.dokuwiki = mkOption {
       type = types.attrsOf (types.submodule siteOpts);
       default = {};
-      description = "Sepcification of one or more dokuwiki sites to service.";
+      description = "Sepcification of one or more dokuwiki sites to serve.";
     };
   };
 
@@ -321,7 +318,7 @@ in
       enable = true;
       virtualHosts = mapAttrs (hostName: cfg:  mkMerge [ cfg.nginx {
         root = mkForce "${pkg hostName cfg}/share/dokuwiki";
-        extraConfig = "fastcgi_param HTTPS on;";
+        extraConfig = lib.optionalString (cfg.nginx.addSSL || cfg.nginx.forceSSL || cfg.nginx.onlySSL || cfg.nginx.enableACME) "fastcgi_param HTTPS on;";
 
         locations."~ /(conf/|bin/|inc/|install.php)" = {
           extraConfig = "deny all;";
@@ -359,7 +356,7 @@ in
               fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
               fastcgi_param REDIRECT_STATUS 200;
               fastcgi_pass unix:${config.services.phpfpm.pools."dokuwiki-${hostName}".socket};
-              fastcgi_param HTTPS on;
+              ${lib.optionalString (cfg.nginx.addSSL || cfg.nginx.forceSSL || cfg.nginx.onlySSL || cfg.nginx.enableACME) "fastcgi_param HTTPS on;"}
           '';
         };
       }]) eachSite;
@@ -385,4 +382,7 @@ in
       isSystemUser = true;
     };
   };
+
+  meta.maintainers = with maintainers; [ _1000101 ];
+
 }
diff --git a/nixpkgs/nixos/modules/services/web-apps/gerrit.nix b/nixpkgs/nixos/modules/services/web-apps/gerrit.nix
index b184c0754d45..657b1a4fc5ba 100644
--- a/nixpkgs/nixos/modules/services/web-apps/gerrit.nix
+++ b/nixpkgs/nixos/modules/services/web-apps/gerrit.nix
@@ -17,6 +17,10 @@ let
     lib.generators.toGitINI cfg.settings
   );
 
+  replicationConfig = pkgs.writeText "replication.conf" (
+    lib.generators.toGitINI cfg.replicationSettings
+  );
+
   # Wrap the gerrit java with all the java options so it can be called
   # like a normal CLI app
   gerrit-cli = pkgs.writeShellScriptBin "gerrit" ''
@@ -106,6 +110,15 @@ in
         '';
       };
 
+      replicationSettings = mkOption {
+        type = gitIniType;
+        default = {};
+        description = ''
+          Replication configuration. This will be generated to the
+          <literal>etc/replication.config</literal> file.
+        '';
+      };
+
       plugins = mkOption {
         type = types.listOf types.package;
         default = [];
@@ -138,6 +151,13 @@ in
 
   config = mkIf cfg.enable {
 
+    assertions = [
+      {
+        assertion = cfg.replicationSettings != {} -> elem "replication" cfg.builtinPlugins;
+        message = "Gerrit replicationSettings require enabling the replication plugin";
+      }
+    ];
+
     services.gerrit.settings = {
       cache.directory = "/var/cache/gerrit";
       container.heapLimit = cfg.jvmHeapLimit;
@@ -194,6 +214,7 @@ in
 
         # copy the config, keep it mutable because Gerrit
         ln -sfv ${gerritConfig} etc/gerrit.config
+        ln -sfv ${replicationConfig} etc/replication.config
 
         # install the plugins
         rm -rf plugins
diff --git a/nixpkgs/nixos/modules/services/web-apps/jitsi-meet.nix b/nixpkgs/nixos/modules/services/web-apps/jitsi-meet.nix
new file mode 100644
index 000000000000..2df762882fae
--- /dev/null
+++ b/nixpkgs/nixos/modules/services/web-apps/jitsi-meet.nix
@@ -0,0 +1,334 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.services.jitsi-meet;
+
+  # The configuration files are JS of format "var <<string>> = <<JSON>>;". In order to
+  # override only some settings, we need to extract the JSON, use jq to merge it with
+  # the config provided by user, and then reconstruct the file.
+  overrideJs =
+    source: varName: userCfg: appendExtra:
+    let
+      extractor = pkgs.writeText "extractor.js" ''
+        var fs = require("fs");
+        eval(fs.readFileSync(process.argv[2], 'utf8'));
+        process.stdout.write(JSON.stringify(eval(process.argv[3])));
+      '';
+      userJson = pkgs.writeText "user.json" (builtins.toJSON userCfg);
+    in (pkgs.runCommand "${varName}.js" { } ''
+      ${pkgs.nodejs}/bin/node ${extractor} ${source} ${varName} > default.json
+      (
+        echo "var ${varName} = "
+        ${pkgs.jq}/bin/jq -s '.[0] * .[1]' default.json ${userJson}
+        echo ";"
+        echo ${escapeShellArg appendExtra}
+      ) > $out
+    '');
+
+  # Essential config - it's probably not good to have these as option default because
+  # types.attrs doesn't do merging. Let's merge explicitly, can still be overriden if
+  # user desires.
+  defaultCfg = {
+    hosts = {
+      domain = cfg.hostName;
+      muc = "conference.${cfg.hostName}";
+      focus = "focus.${cfg.hostName}";
+    };
+    bosh = "//${cfg.hostName}/http-bind";
+  };
+in
+{
+  options.services.jitsi-meet = with types; {
+    enable = mkEnableOption "Jitsi Meet - Secure, Simple and Scalable Video Conferences";
+
+    hostName = mkOption {
+      type = str;
+      example = "meet.example.org";
+      description = ''
+        Hostname of the Jitsi Meet instance.
+      '';
+    };
+
+    config = mkOption {
+      type = attrs;
+      default = { };
+      example = literalExample ''
+        {
+          enableWelcomePage = false;
+          defaultLang = "fi";
+        }
+      '';
+      description = ''
+        Client-side web application settings that override the defaults in <filename>config.js</filename>.
+
+        See <link xlink:href="https://github.com/jitsi/jitsi-meet/blob/master/config.js" /> for default
+        configuration with comments.
+      '';
+    };
+
+    extraConfig = mkOption {
+      type = lines;
+      default = "";
+      description = ''
+        Text to append to <filename>config.js</filename> web application config file.
+
+        Can be used to insert JavaScript logic to determine user's region in cascading bridges setup.
+      '';
+    };
+
+    interfaceConfig = mkOption {
+      type = attrs;
+      default = { };
+      example = literalExample ''
+        {
+          SHOW_JITSI_WATERMARK = false;
+          SHOW_WATERMARK_FOR_GUESTS = false;
+        }
+      '';
+      description = ''
+        Client-side web-app interface settings that override the defaults in <filename>interface_config.js</filename>.
+
+        See <link xlink:href="https://github.com/jitsi/jitsi-meet/blob/master/interface_config.js" /> for
+        default configuration with comments.
+      '';
+    };
+
+    videobridge = {
+      enable = mkOption {
+        type = bool;
+        default = true;
+        description = ''
+          Whether to enable Jitsi Videobridge instance and configure it to connect to Prosody.
+
+          Additional configuration is possible with <option>services.jitsi-videobridge</option>.
+        '';
+      };
+
+      passwordFile = mkOption {
+        type = nullOr str;
+        default = null;
+        example = "/run/keys/videobridge";
+        description = ''
+          File containing password to the Prosody account for videobridge.
+
+          If <literal>null</literal>, a file with password will be generated automatically. Setting
+          this option is useful if you plan to connect additional videobridges to the XMPP server.
+        '';
+      };
+    };
+
+    jicofo.enable = mkOption {
+      type = bool;
+      default = true;
+      description = ''
+        Whether to enable JiCoFo instance and configure it to connect to Prosody.
+
+        Additional configuration is possible with <option>services.jicofo</option>.
+      '';
+    };
+
+    nginx.enable = mkOption {
+      type = bool;
+      default = true;
+      description = ''
+        Whether to enable nginx virtual host that will serve the javascript application and act as
+        a proxy for the XMPP server. Further nginx configuration can be done by adapting
+        <option>services.nginx.virtualHosts.&lt;hostName&gt;</option>.
+        When this is enabled, ACME will be used to retrieve a TLS certificate by default. To disable
+        this, set the <option>services.nginx.virtualHosts.&lt;hostName&gt;.enableACME</option> to
+        <literal>false</literal> and if appropriate do the same for
+        <option>services.nginx.virtualHosts.&lt;hostName&gt;.forceSSL</option>.
+      '';
+    };
+
+    prosody.enable = mkOption {
+      type = bool;
+      default = true;
+      description = ''
+        Whether to configure Prosody to relay XMPP messages between Jitsi Meet components. Turn this
+        off if you want to configure it manually.
+      '';
+    };
+  };
+
+  config = mkIf cfg.enable {
+    services.prosody = mkIf cfg.prosody.enable {
+      enable = mkDefault true;
+      xmppComplianceSuite = mkDefault false;
+      modules = {
+        admin_adhoc = mkDefault false;
+        bosh = mkDefault true;
+        ping = mkDefault true;
+        roster = mkDefault true;
+        saslauth = mkDefault true;
+        tls = mkDefault true;
+      };
+      muc = [
+        {
+          domain = "conference.${cfg.hostName}";
+          name = "Jitsi Meet MUC";
+          roomLocking = false;
+          roomDefaultPublicJids = true;
+          extraConfig = ''
+            storage = "memory"
+          '';
+        }
+        {
+          domain = "internal.${cfg.hostName}";
+          name = "Jitsi Meet Videobridge MUC";
+          extraConfig = ''
+            storage = "memory"
+            admins = { "focus@auth.${cfg.hostName}", "jvb@auth.${cfg.hostName}" }
+          '';
+          #-- muc_room_cache_size = 1000
+        }
+      ];
+      extraModules = [ "pubsub" ];
+      extraConfig = mkAfter ''
+        Component "focus.${cfg.hostName}"
+          component_secret = os.getenv("JICOFO_COMPONENT_SECRET")
+      '';
+      virtualHosts.${cfg.hostName} = {
+        enabled = true;
+        domain = cfg.hostName;
+        extraConfig = ''
+          authentication = "anonymous"
+          c2s_require_encryption = false
+          admins = { "focus@auth.${cfg.hostName}" }
+        '';
+        ssl = {
+          cert = "/var/lib/jitsi-meet/jitsi-meet.crt";
+          key = "/var/lib/jitsi-meet/jitsi-meet.key";
+        };
+      };
+      virtualHosts."auth.${cfg.hostName}" = {
+        enabled = true;
+        domain = "auth.${cfg.hostName}";
+        extraConfig = ''
+          authentication = "internal_plain"
+        '';
+        ssl = {
+          cert = "/var/lib/jitsi-meet/jitsi-meet.crt";
+          key = "/var/lib/jitsi-meet/jitsi-meet.key";
+        };
+      };
+    };
+    systemd.services.prosody.serviceConfig = mkIf cfg.prosody.enable {
+      EnvironmentFile = [ "/var/lib/jitsi-meet/secrets-env" ];
+      SupplementaryGroups = [ "jitsi-meet" ];
+    };
+
+    users.groups.jitsi-meet = {};
+    systemd.tmpfiles.rules = [
+      "d '/var/lib/jitsi-meet' 0750 root jitsi-meet - -"
+    ];
+
+    systemd.services.jitsi-meet-init-secrets = {
+      wantedBy = [ "multi-user.target" ];
+      before = [ "jicofo.service" "jitsi-videobridge2.service" ] ++ (optional cfg.prosody.enable "prosody.service");
+      serviceConfig = {
+        Type = "oneshot";
+      };
+
+      script = let
+        secrets = [ "jicofo-component-secret" "jicofo-user-secret" ] ++ (optional (cfg.videobridge.passwordFile == null) "videobridge-secret");
+        videobridgeSecret = if cfg.videobridge.passwordFile != null then cfg.videobridge.passwordFile else "/var/lib/jitsi-meet/videobridge-secret";
+      in
+      ''
+        cd /var/lib/jitsi-meet
+        ${concatMapStringsSep "\n" (s: ''
+          if [ ! -f ${s} ]; then
+            tr -dc a-zA-Z0-9 </dev/urandom | head -c 64 > ${s}
+            chown root:jitsi-meet ${s}
+            chmod 640 ${s}
+          fi
+        '') secrets}
+
+        # for easy access in prosody
+        echo "JICOFO_COMPONENT_SECRET=$(cat jicofo-component-secret)" > secrets-env
+        chown root:jitsi-meet secrets-env
+        chmod 640 secrets-env
+      ''
+      + optionalString cfg.prosody.enable ''
+        ${config.services.prosody.package}/bin/prosodyctl register focus auth.${cfg.hostName} "$(cat /var/lib/jitsi-meet/jicofo-user-secret)"
+        ${config.services.prosody.package}/bin/prosodyctl register jvb auth.${cfg.hostName} "$(cat ${videobridgeSecret})"
+
+        # generate self-signed certificates
+        if [ ! -f /var/lib/jitsi-meet.crt ]; then
+          ${getBin pkgs.openssl}/bin/openssl req \
+            -x509 \
+            -newkey rsa:4096 \
+            -keyout /var/lib/jitsi-meet/jitsi-meet.key \
+            -out /var/lib/jitsi-meet/jitsi-meet.crt \
+            -days 36500 \
+            -nodes \
+            -subj '/CN=${cfg.hostName}/CN=auth.${cfg.hostName}'
+          chmod 640 /var/lib/jitsi-meet/jitsi-meet.{crt,key}
+          chown root:jitsi-meet /var/lib/jitsi-meet/jitsi-meet.{crt,key}
+        fi
+      '';
+    };
+
+    services.nginx = mkIf cfg.nginx.enable {
+      enable = mkDefault true;
+      virtualHosts.${cfg.hostName} = {
+        enableACME = mkDefault true;
+        forceSSL = mkDefault true;
+        root = pkgs.jitsi-meet;
+        extraConfig = ''
+          ssi on;
+        '';
+        locations."@root_path".extraConfig = ''
+          rewrite ^/(.*)$ / break;
+        '';
+        locations."~ ^/([^/\\?&:'\"]+)$".tryFiles = "$uri @root_path";
+        locations."=/http-bind" = {
+          proxyPass = "http://localhost:5280/http-bind";
+          extraConfig = ''
+            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+            proxy_set_header Host $host;
+          '';
+        };
+        locations."=/external_api.js" = mkDefault {
+          alias = "${pkgs.jitsi-meet}/libs/external_api.min.js";
+        };
+        locations."=/config.js" = mkDefault {
+          alias = overrideJs "${pkgs.jitsi-meet}/config.js" "config" (recursiveUpdate defaultCfg cfg.config) cfg.extraConfig;
+        };
+        locations."=/interface_config.js" = mkDefault {
+          alias = overrideJs "${pkgs.jitsi-meet}/interface_config.js" "interfaceConfig" cfg.interfaceConfig "";
+        };
+      };
+    };
+
+    services.jitsi-videobridge = mkIf cfg.videobridge.enable {
+      enable = true;
+      xmppConfigs."localhost" = {
+        userName = "jvb";
+        domain = "auth.${cfg.hostName}";
+        passwordFile = "/var/lib/jitsi-meet/videobridge-secret";
+        mucJids = "jvbbrewery@internal.${cfg.hostName}";
+        disableCertificateVerification = true;
+      };
+    };
+
+    services.jicofo = mkIf cfg.jicofo.enable {
+      enable = true;
+      xmppHost = "localhost";
+      xmppDomain = cfg.hostName;
+      userDomain = "auth.${cfg.hostName}";
+      userName = "focus";
+      userPasswordFile = "/var/lib/jitsi-meet/jicofo-user-secret";
+      componentPasswordFile = "/var/lib/jitsi-meet/jicofo-component-secret";
+      bridgeMuc = "jvbbrewery@internal.${cfg.hostName}";
+      config = {
+        "org.jitsi.jicofo.ALWAYS_TRUST_MODE_ENABLED" = "true";
+      };
+    };
+  };
+
+  meta.doc = ./jitsi-meet.xml;
+  meta.maintainers = lib.teams.jitsi.members;
+}
diff --git a/nixpkgs/nixos/modules/services/web-apps/jitsi-meet.xml b/nixpkgs/nixos/modules/services/web-apps/jitsi-meet.xml
new file mode 100644
index 000000000000..97373bc6d9a8
--- /dev/null
+++ b/nixpkgs/nixos/modules/services/web-apps/jitsi-meet.xml
@@ -0,0 +1,55 @@
+<chapter xmlns="http://docbook.org/ns/docbook"
+         xmlns:xlink="http://www.w3.org/1999/xlink"
+         xmlns:xi="http://www.w3.org/2001/XInclude"
+         version="5.0"
+         xml:id="module-services-jitsi-meet">
+ <title>Jitsi Meet</title>
+ <para>
+   With Jitsi Meet on NixOS you can quickly configure a complete,
+   private, self-hosted video conferencing solution.
+ </para>
+
+ <section xml:id="module-services-jitsi-basic-usage">
+ <title>Basic usage</title>
+   <para>
+     A minimal configuration using Let's Encrypt for TLS certificates looks like this:
+<programlisting>{
+  services.jitsi-meet = {
+    <link linkend="opt-services.jitsi-meet.enable">enable</link> = true;
+    <link linkend="opt-services.jitsi-meet.enable">hostName</link> = "jitsi.example.com";
+  };
+  <link linkend="opt-services.jitsi-videobridge.openFirewall">services.jitsi-videobridge.openFirewall</link> = true;
+  <link linkend="opt-networking.firewall.allowedTCPPorts">networking.firewall.allowedTCPPorts</link> = [ 80 443 ];
+  <link linkend="opt-security.acme.email">security.acme.email</link> = "me@example.com";
+  <link linkend="opt-security.acme.acceptTerms">security.acme.acceptTerms</link> = true;
+}</programlisting>
+   </para>
+ </section>
+
+ <section xml:id="module-services-jitsi-configuration">
+ <title>Configuration</title>
+   <para>
+     Here is the minimal configuration with additional configurations:
+<programlisting>{
+  services.jitsi-meet = {
+    <link linkend="opt-services.jitsi-meet.enable">enable</link> = true;
+    <link linkend="opt-services.jitsi-meet.enable">hostName</link> = "jitsi.example.com";
+    <link linkend="opt-services.jitsi-meet.config">config</link> = {
+      enableWelcomePage = false;
+      prejoinPageEnabled = true;
+      defaultLang = "fi";
+    };
+    <link linkend="opt-services.jitsi-meet.interfaceConfig">interfaceConfig</link> = {
+      SHOW_JITSI_WATERMARK = false;
+      SHOW_WATERMARK_FOR_GUESTS = false;
+    };
+  };
+  <link linkend="opt-services.jitsi-videobridge.openFirewall">services.jitsi-videobridge.openFirewall</link> = true;
+  <link linkend="opt-networking.firewall.allowedTCPPorts">networking.firewall.allowedTCPPorts</link> = [ 80 443 ];
+  <link linkend="opt-security.acme.email">security.acme.email</link> = "me@example.com";
+  <link linkend="opt-security.acme.acceptTerms">security.acme.acceptTerms</link> = true;
+}</programlisting>
+   </para>
+ </section>
+
+</chapter>
diff --git a/nixpkgs/nixos/modules/services/web-apps/moodle.nix b/nixpkgs/nixos/modules/services/web-apps/moodle.nix
index 1196780cf6ef..f45eaa24d544 100644
--- a/nixpkgs/nixos/modules/services/web-apps/moodle.nix
+++ b/nixpkgs/nixos/modules/services/web-apps/moodle.nix
@@ -40,7 +40,7 @@ let
   $CFG->disableupdateautodeploy = true;
 
   $CFG->pathtogs = '${pkgs.ghostscript}/bin/gs';
-  $CFG->pathtophp = '${pkgs.php}/bin/php';
+  $CFG->pathtophp = '${phpExt}/bin/php';
   $CFG->pathtodu = '${pkgs.coreutils}/bin/du';
   $CFG->aspellpath = '${pkgs.aspell}/bin/aspell';
   $CFG->pathtodot = '${pkgs.graphviz}/bin/dot';
@@ -55,6 +55,9 @@ let
 
   mysqlLocal = cfg.database.createLocally && cfg.database.type == "mysql";
   pgsqlLocal = cfg.database.createLocally && cfg.database.type == "pgsql";
+
+  phpExt = pkgs.php.withExtensions
+        ({ enabled, all }: with all; [ iconv mbstring curl openssl tokenizer xmlrpc soap ctype zip gd simplexml dom  intl json sqlite3 pgsql pdo_sqlite pdo_pgsql pdo_odbc pdo_mysql pdo mysqli session zlib xmlreader fileinfo ]);
 in
 {
   # interface
@@ -222,6 +225,7 @@ in
 
     services.phpfpm.pools.moodle = {
       inherit user group;
+      phpPackage = phpExt;
       phpEnv.MOODLE_CONFIG = "${moodleConfig}";
       phpOptions = ''
         zend_extension = opcache.so
@@ -263,13 +267,13 @@ in
       after = optional mysqlLocal "mysql.service" ++ optional pgsqlLocal "postgresql.service";
       environment.MOODLE_CONFIG = moodleConfig;
       script = ''
-        ${pkgs.php}/bin/php ${cfg.package}/share/moodle/admin/cli/check_database_schema.php && rc=$? || rc=$?
+        ${phpExt}/bin/php ${cfg.package}/share/moodle/admin/cli/check_database_schema.php && rc=$? || rc=$?
 
-        [ "$rc" == 1 ] && ${pkgs.php}/bin/php ${cfg.package}/share/moodle/admin/cli/upgrade.php \
+        [ "$rc" == 1 ] && ${phpExt}/bin/php ${cfg.package}/share/moodle/admin/cli/upgrade.php \
           --non-interactive \
           --allow-unstable
 
-        [ "$rc" == 2 ] && ${pkgs.php}/bin/php ${cfg.package}/share/moodle/admin/cli/install_database.php \
+        [ "$rc" == 2 ] && ${phpExt}/bin/php ${cfg.package}/share/moodle/admin/cli/install_database.php \
           --agree-license \
           --adminpass=${cfg.initialPassword}
 
@@ -289,7 +293,7 @@ in
       serviceConfig = {
         User = user;
         Group = group;
-        ExecStart = "${pkgs.php}/bin/php ${cfg.package}/share/moodle/admin/cli/cron.php";
+        ExecStart = "${phpExt}/bin/php ${cfg.package}/share/moodle/admin/cli/cron.php";
       };
     };
 
diff --git a/nixpkgs/nixos/modules/services/web-apps/nextcloud.nix b/nixpkgs/nixos/modules/services/web-apps/nextcloud.nix
index 5b9065dec3c5..7da119758fc9 100644
--- a/nixpkgs/nixos/modules/services/web-apps/nextcloud.nix
+++ b/nixpkgs/nixos/modules/services/web-apps/nextcloud.nix
@@ -45,6 +45,22 @@ let
   inherit (config.system) stateVersion;
 
 in {
+
+  imports = [
+    (mkRemovedOptionModule [ "services" "nextcloud" "nginx" "enable" ] ''
+      The nextcloud module supports `nginx` as reverse-proxy by default and doesn't
+      support other reverse-proxies officially.
+
+      However it's possible to use an alternative reverse-proxy by
+
+        * disabling nginx
+        * setting `listen.owner` & `listen.group` in the phpfpm-pool to a different value
+
+      Further details about this can be found in the `Nextcloud`-section of the NixOS-manual
+      (which can be openend e.g. by running `nixos-help`).
+    '')
+  ];
+
   options.services.nextcloud = {
     enable = mkEnableOption "nextcloud";
     hostName = mkOption {
@@ -69,7 +85,7 @@ in {
     package = mkOption {
       type = types.package;
       description = "Which package to use for the Nextcloud instance.";
-      relatedPackages = [ "nextcloud17" "nextcloud18" ];
+      relatedPackages = [ "nextcloud17" "nextcloud18" "nextcloud19" ];
     };
 
     maxUploadSize = mkOption {
@@ -91,16 +107,6 @@ in {
       '';
     };
 
-    nginx.enable = mkOption {
-      type = types.bool;
-      default = false;
-      description = ''
-        Whether to enable nginx virtual host management.
-        Further nginx configuration can be done by adapting <literal>services.nginx.virtualHosts.&lt;name&gt;</literal>.
-        See <xref linkend="opt-services.nginx.virtualHosts"/> for further information.
-      '';
-    };
-
     webfinger = mkOption {
       type = types.bool;
       default = false;
@@ -303,6 +309,14 @@ in {
         '';
       };
     };
+    occ = mkOption {
+      type = types.package;
+      default = occ;
+      internal = true;
+      description = ''
+        The nextcloud-occ program preconfigured to target this Nextcloud instance.
+      '';
+    };
   };
 
   config = mkIf cfg.enable (mkMerge [
@@ -336,7 +350,16 @@ in {
              server, and wait until the upgrade to 17 is finished.
 
           Then, set `services.nextcloud.package` to `pkgs.nextcloud18` to upgrade to
-          Nextcloud version 18.
+          Nextcloud version 18. Please note that Nextcloud 19 is already out and it's
+          recommended to upgrade to nextcloud19 after that.
+        '')
+        ++ (optional (versionOlder cfg.package.version "19") ''
+          A legacy Nextcloud install (from before NixOS 20.09/unstable) may be installed.
+
+          If/After nextcloud18 is installed successfully, you can safely upgrade to
+          nextcloud19. If not, please upgrade to nextcloud18 first since Nextcloud doesn't
+          support upgrades that skip multiple versions (i.e. an upgrade from 17 to 19 isn't
+          possible, but an upgrade from 18 to 19).
         '');
 
       services.nextcloud.package = with pkgs;
@@ -348,7 +371,8 @@ in {
               `pkgs.nextcloud`.
             ''
           else if versionOlder stateVersion "20.03" then nextcloud17
-          else nextcloud18
+          else if versionOlder stateVersion "20.09" then nextcloud18
+          else nextcloud19
         );
     }
 
@@ -360,6 +384,11 @@ in {
       };
 
       systemd.services = {
+        # When upgrading the Nextcloud package, Nextcloud can report errors such as
+        # "The files of the app [all apps in /var/lib/nextcloud/apps] were not replaced correctly"
+        # Restarting phpfpm on Nextcloud package update fixes these issues (but this is a workaround).
+        phpfpm-nextcloud.restartTriggers = [ cfg.package ];
+
         nextcloud-setup = let
           c = cfg.config;
           writePhpArrary = a: "[${concatMapStringsSep "," (val: ''"${toString val}"'') a}]";
@@ -445,10 +474,18 @@ in {
           script = ''
             chmod og+x ${cfg.home}
             ln -sf ${cfg.package}/apps ${cfg.home}/
-            mkdir -p ${cfg.home}/config ${cfg.home}/data ${cfg.home}/store-apps
-            ln -sf ${overrideConfig} ${cfg.home}/config/override.config.php
 
-            chown -R nextcloud:nginx ${cfg.home}/config ${cfg.home}/data ${cfg.home}/store-apps
+            # create nextcloud directories.
+            # if the directories exist already with wrong permissions, we fix that
+            for dir in ${cfg.home}/config ${cfg.home}/data ${cfg.home}/store-apps; do
+              if [ ! -e $dir ]; then
+                install -o nextcloud -g nextcloud -d $dir
+              elif [ $(stat -c "%G" $dir) != "nextcloud" ]; then
+                chgrp -R nextcloud $dir
+              fi
+            done
+
+            ln -sf ${overrideConfig} ${cfg.home}/config/override.config.php
 
             # Do not install if already installed
             if [[ ! -e ${cfg.home}/config/config.php ]]; then
@@ -461,6 +498,7 @@ in {
             ${occSetTrustedDomainsCmd}
           '';
           serviceConfig.Type = "oneshot";
+          serviceConfig.User = "nextcloud";
         };
         nextcloud-cron = {
           environment.NEXTCLOUD_CONFIG_DIR = "${cfg.home}/config";
@@ -479,7 +517,7 @@ in {
       services.phpfpm = {
         pools.nextcloud = {
           user = "nextcloud";
-          group = "nginx";
+          group = "nextcloud";
           phpOptions = phpOptionsStr;
           phpPackage = phpPackage;
           phpEnv = {
@@ -487,128 +525,121 @@ in {
             PATH = "/run/wrappers/bin:/nix/var/nix/profiles/default/bin:/run/current-system/sw/bin:/usr/bin:/bin";
           };
           settings = mapAttrs (name: mkDefault) {
-            "listen.owner" = "nginx";
-            "listen.group" = "nginx";
+            "listen.owner" = config.services.nginx.user;
+            "listen.group" = config.services.nginx.group;
           } // cfg.poolSettings;
           extraConfig = cfg.poolConfig;
         };
       };
 
-      users.extraUsers.nextcloud = {
+      users.users.nextcloud = {
         home = "${cfg.home}";
-        group = "nginx";
+        group = "nextcloud";
         createHome = true;
       };
+      users.groups.nextcloud.members = [ "nextcloud" config.services.nginx.user ];
 
       environment.systemPackages = [ occ ];
-    }
 
-    (mkIf cfg.nginx.enable {
-      services.nginx = {
-        enable = true;
-        virtualHosts = {
-          ${cfg.hostName} = {
-            root = cfg.package;
-            locations = {
-              "= /robots.txt" = {
-                priority = 100;
-                extraConfig = ''
-                  allow all;
-                  log_not_found off;
-                  access_log off;
-                '';
-              };
-              "/" = {
-                priority = 200;
-                extraConfig = "rewrite ^ /index.php;";
-              };
-              "~ ^/store-apps" = {
-                priority = 201;
-                extraConfig = "root ${cfg.home};";
-              };
-              "= /.well-known/carddav" = {
-                priority = 210;
-                extraConfig = "return 301 $scheme://$host/remote.php/dav;";
-              };
-              "= /.well-known/caldav" = {
-                priority = 210;
-                extraConfig = "return 301 $scheme://$host/remote.php/dav;";
-              };
-              "~ ^\\/(?:build|tests|config|lib|3rdparty|templates|data)\\/" = {
-                priority = 300;
-                extraConfig = "deny all;";
-              };
-              "~ ^\\/(?:\\.|autotest|occ|issue|indie|db_|console)" = {
-                priority = 300;
-                extraConfig = "deny all;";
-              };
-              "~ ^\\/(?:index|remote|public|cron|core/ajax\\/update|status|ocs\\/v[12]|updater\\/.+|ocs-provider\\/.+|ocm-provider\\/.+)\\.php(?:$|\\/)" = {
-                priority = 500;
-                extraConfig = ''
-                  include ${config.services.nginx.package}/conf/fastcgi.conf;
-                  fastcgi_split_path_info ^(.+\.php)(\\/.*)$;
-                  try_files $fastcgi_script_name =404;
-                  fastcgi_param PATH_INFO $fastcgi_path_info;
-                  fastcgi_param HTTPS ${if cfg.https then "on" else "off"};
-                  fastcgi_param modHeadersAvailable true;
-                  fastcgi_param front_controller_active true;
-                  fastcgi_pass unix:${fpm.socket};
-                  fastcgi_intercept_errors on;
-                  fastcgi_request_buffering off;
-                  fastcgi_read_timeout 120s;
-                '';
-              };
-              "~ ^\\/(?:updater|ocs-provider|ocm-provider)(?:$|\\/)".extraConfig = ''
-                try_files $uri/ =404;
-                index index.php;
-              '';
-              "~ \\.(?:css|js|woff2?|svg|gif)$".extraConfig = ''
-                try_files $uri /index.php$request_uri;
-                add_header Cache-Control "public, max-age=15778463";
-                add_header X-Content-Type-Options nosniff;
-                add_header X-XSS-Protection "1; mode=block";
-                add_header X-Robots-Tag none;
-                add_header X-Download-Options noopen;
-                add_header X-Permitted-Cross-Domain-Policies none;
-                add_header X-Frame-Options sameorigin;
-                add_header Referrer-Policy no-referrer;
-                access_log off;
-              '';
-              "~ \\.(?:png|html|ttf|ico|jpg|jpeg|bcmap|mp4|webm)$".extraConfig = ''
-                try_files $uri /index.php$request_uri;
-                access_log off;
-              '';
-            };
+      services.nginx.enable = mkDefault true;
+      services.nginx.virtualHosts.${cfg.hostName} = {
+        root = cfg.package;
+        locations = {
+          "= /robots.txt" = {
+            priority = 100;
+            extraConfig = ''
+              allow all;
+              log_not_found off;
+              access_log off;
+            '';
+          };
+          "/" = {
+            priority = 900;
+            extraConfig = "try_files $uri $uri/ /index.php$request_uri;";
+          };
+          "~ ^/store-apps" = {
+            priority = 201;
+            extraConfig = "root ${cfg.home};";
+          };
+          "^~ /.well-known" = {
+            priority = 210;
+            extraConfig = ''
+              location = /.well-known/carddav {
+                return 301 $scheme://$host/remote.php/dav;
+              }
+              location = /.well-known/caldav {
+                return 301 $scheme://$host/remote.php/dav;
+              }
+              try_files $uri $uri/ =404;
+            '';
+          };
+          "~ ^/(?:build|tests|config|lib|3rdparty|templates|data)(?:$|/)".extraConfig = ''
+            return 404;
+          '';
+          "~ ^/(?:\\.|autotest|occ|issue|indie|db_|console)".extraConfig = ''
+            return 404;
+          '';
+          "~ \\.php(?:$|/)" = {
+            priority = 500;
             extraConfig = ''
-              add_header X-Content-Type-Options nosniff;
-              add_header X-XSS-Protection "1; mode=block";
-              add_header X-Robots-Tag none;
-              add_header X-Download-Options noopen;
-              add_header X-Permitted-Cross-Domain-Policies none;
-              add_header X-Frame-Options sameorigin;
-              add_header Referrer-Policy no-referrer;
-              add_header Strict-Transport-Security "max-age=15552000; includeSubDomains" always;
-              error_page 403 /core/templates/403.php;
-              error_page 404 /core/templates/404.php;
-              client_max_body_size ${cfg.maxUploadSize};
-              fastcgi_buffers 64 4K;
-              fastcgi_hide_header X-Powered-By;
-              gzip on;
-              gzip_vary on;
-              gzip_comp_level 4;
-              gzip_min_length 256;
-              gzip_proxied expired no-cache no-store private no_last_modified no_etag auth;
-              gzip_types application/atom+xml application/javascript application/json application/ld+json application/manifest+json application/rss+xml application/vnd.geo+json application/vnd.ms-fontobject application/x-font-ttf application/x-web-app-manifest+json application/xhtml+xml application/xml font/opentype image/bmp image/svg+xml image/x-icon text/cache-manifest text/css text/plain text/vcard text/vnd.rim.location.xloc text/vtt text/x-component text/x-cross-domain-policy;
-
-              ${optionalString cfg.webfinger ''
-                rewrite ^/.well-known/host-meta /public.php?service=host-meta last;
-                rewrite ^/.well-known/host-meta.json /public.php?service=host-meta-json last;
-              ''}
+              include ${config.services.nginx.package}/conf/fastcgi.conf;
+              fastcgi_split_path_info ^(.+?\.php)(\\/.*)$;
+              set $path_info $fastcgi_path_info;
+              try_files $fastcgi_script_name =404;
+              fastcgi_param PATH_INFO $path_info;
+              fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
+              fastcgi_param HTTPS ${if cfg.https then "on" else "off"};
+              fastcgi_param modHeadersAvailable true;
+              fastcgi_param front_controller_active true;
+              fastcgi_pass unix:${fpm.socket};
+              fastcgi_intercept_errors on;
+              fastcgi_request_buffering off;
+              fastcgi_read_timeout 120s;
             '';
           };
+          "~ \\.(?:css|js|svg|gif|map)$".extraConfig = ''
+            try_files $uri /index.php$request_uri;
+            expires 6M;
+            access_log off;
+          '';
+          "~ \\.woff2?$".extraConfig = ''
+            try_files $uri /index.php$request_uri;
+            expires 7d;
+            access_log off;
+          '';
+          "~ ^\\/(?:updater|ocs-provider|ocm-provider)(?:$|\\/)".extraConfig = ''
+            try_files $uri/ =404;
+            index index.php;
+          '';
         };
+        extraConfig = ''
+          index index.php index.html /index.php$request_uri;
+          expires 1m;
+          add_header X-Content-Type-Options nosniff;
+          add_header X-XSS-Protection "1; mode=block";
+          add_header X-Robots-Tag none;
+          add_header X-Download-Options noopen;
+          add_header X-Permitted-Cross-Domain-Policies none;
+          add_header X-Frame-Options sameorigin;
+          add_header Referrer-Policy no-referrer;
+          add_header Strict-Transport-Security "max-age=15552000; includeSubDomains" always;
+          client_max_body_size ${cfg.maxUploadSize};
+          fastcgi_buffers 64 4K;
+          fastcgi_hide_header X-Powered-By;
+          gzip on;
+          gzip_vary on;
+          gzip_comp_level 4;
+          gzip_min_length 256;
+          gzip_proxied expired no-cache no-store private no_last_modified no_etag auth;
+          gzip_types application/atom+xml application/javascript application/json application/ld+json application/manifest+json application/rss+xml application/vnd.geo+json application/vnd.ms-fontobject application/x-font-ttf application/x-web-app-manifest+json application/xhtml+xml application/xml font/opentype image/bmp image/svg+xml image/x-icon text/cache-manifest text/css text/plain text/vcard text/vnd.rim.location.xloc text/vtt text/x-component text/x-cross-domain-policy;
+
+          ${optionalString cfg.webfinger ''
+            rewrite ^/.well-known/host-meta /public.php?service=host-meta last;
+            rewrite ^/.well-known/host-meta.json /public.php?service=host-meta-json last;
+          ''}
+        '';
       };
-    })
+    }
   ]);
 
   meta.doc = ./nextcloud.xml;
diff --git a/nixpkgs/nixos/modules/services/web-apps/nextcloud.xml b/nixpkgs/nixos/modules/services/web-apps/nextcloud.xml
index fc454f8ba254..02e4dba28610 100644
--- a/nixpkgs/nixos/modules/services/web-apps/nextcloud.xml
+++ b/nixpkgs/nixos/modules/services/web-apps/nextcloud.xml
@@ -29,7 +29,6 @@
   services.nextcloud = {
     <link linkend="opt-services.nextcloud.enable">enable</link> = true;
     <link linkend="opt-services.nextcloud.hostName">hostName</link> = "nextcloud.tld";
-    <link linkend="opt-services.nextcloud.nginx.enable">nginx.enable</link> = true;
     config = {
       <link linkend="opt-services.nextcloud.config.dbtype">dbtype</link> = "pgsql";
       <link linkend="opt-services.nextcloud.config.dbuser">dbuser</link> = "nextcloud";
@@ -61,9 +60,8 @@
   </para>
 
   <para>
-   The options <literal>hostName</literal> and <literal>nginx.enable</literal>
-   are used internally to configure an HTTP server using
-   <literal><link xlink:href="https://php-fpm.org/">PHP-FPM</link></literal>
+   The <literal>hostName</literal> option is used internally to configure an HTTP
+   server using <literal><link xlink:href="https://php-fpm.org/">PHP-FPM</link></literal>
    and <literal>nginx</literal>. The <literal>config</literal> attribute set is
    used by the imperative installer and all values are written to an additional file
    to ensure that changes can be applied by changing the module's options.
@@ -125,6 +123,61 @@
   </para>
  </section>
 
+ <section xml:id="module-services-nextcloud-httpd">
+  <title>Using an alternative webserver as reverse-proxy (e.g. <literal>httpd</literal>)</title>
+  <para>
+   By default, <package>nginx</package> is used as reverse-proxy for <package>nextcloud</package>.
+   However, it's possible to use e.g. <package>httpd</package> by explicitly disabling
+   <package>nginx</package> using <xref linkend="opt-services.nginx.enable" /> and fixing the
+   settings <literal>listen.owner</literal> &amp; <literal>listen.group</literal> in the
+   <link linkend="opt-services.phpfpm.pools">corresponding <literal>phpfpm</literal> pool</link>.
+  </para>
+  <para>
+   An exemplary configuration may look like this:
+<programlisting>{ config, lib, pkgs, ... }: {
+  <link linkend="opt-services.nginx.enable">services.nginx.enable</link> = false;
+  services.nextcloud = {
+    <link linkend="opt-services.nextcloud.enable">enable</link> = true;
+    <link linkend="opt-services.nextcloud.hostName">hostName</link> = "localhost";
+
+    /* further, required options */
+  };
+  <link linkend="opt-services.phpfpm.pools._name_.settings">services.phpfpm.pools.nextcloud.settings</link> = {
+    "listen.owner" = config.services.httpd.user;
+    "listen.group" = config.services.httpd.group;
+  };
+  services.httpd = {
+    <link linkend="opt-services.httpd.enable">enable</link> = true;
+    <link linkend="opt-services.httpd.adminAddr">adminAddr</link> = "webmaster@localhost";
+    <link linkend="opt-services.httpd.extraModules">extraModules</link> = [ "proxy_fcgi" ];
+    virtualHosts."localhost" = {
+      <link linkend="opt-services.httpd.virtualHosts._name_.documentRoot">documentRoot</link> = config.services.nextcloud.package;
+      <link linkend="opt-services.httpd.virtualHosts._name_.extraConfig">extraConfig</link> = ''
+        &lt;Directory "${config.services.nextcloud.package}"&gt;
+          &lt;FilesMatch "\.php$"&gt;
+            &lt;If "-f %{REQUEST_FILENAME}"&gt;
+              SetHandler "proxy:unix:${config.services.phpfpm.pools.nextcloud.socket}|fcgi://localhost/"
+            &lt;/If&gt;
+          &lt;/FilesMatch&gt;
+          &lt;IfModule mod_rewrite.c&gt;
+            RewriteEngine On
+            RewriteBase /
+            RewriteRule ^index\.php$ - [L]
+            RewriteCond %{REQUEST_FILENAME} !-f
+            RewriteCond %{REQUEST_FILENAME} !-d
+            RewriteRule . /index.php [L]
+          &lt;/IfModule&gt;
+          DirectoryIndex index.php
+          Require all granted
+          Options +FollowSymLinks
+        &lt;/Directory&gt;
+      '';
+    };
+  };
+}</programlisting>
+  </para>
+ </section>
+
  <section xml:id="module-services-nextcloud-maintainer-info">
   <title>Maintainer information</title>
 
@@ -161,5 +214,11 @@
   };
 }</programlisting>
   </para>
+
+  <para>
+   Ideally we should make sure that it's possible to jump two NixOS versions forward:
+   i.e. the warnings and the logic in the module should guard a user to upgrade from a
+   Nextcloud on e.g. 19.09 to a Nextcloud on 20.09.
+  </para>
  </section>
 </chapter>
diff --git a/nixpkgs/nixos/modules/services/web-apps/pgpkeyserver-lite.nix b/nixpkgs/nixos/modules/services/web-apps/pgpkeyserver-lite.nix
index ad70ba70bbef..838fd19ad294 100644
--- a/nixpkgs/nixos/modules/services/web-apps/pgpkeyserver-lite.nix
+++ b/nixpkgs/nixos/modules/services/web-apps/pgpkeyserver-lite.nix
@@ -33,7 +33,7 @@ in
         description = "
           Which hostname to set the vHost to that is proxying to sks.
         ";
-      };     
+      };
 
       hkpAddress = mkOption {
         default = builtins.head sksCfg.hkpAddress;
diff --git a/nixpkgs/nixos/modules/services/web-apps/rss-bridge.nix b/nixpkgs/nixos/modules/services/web-apps/rss-bridge.nix
new file mode 100644
index 000000000000..f1d5b7660f32
--- /dev/null
+++ b/nixpkgs/nixos/modules/services/web-apps/rss-bridge.nix
@@ -0,0 +1,127 @@
+{ config, lib, pkgs, ... }:
+with lib;
+let
+  cfg = config.services.rss-bridge;
+
+  poolName = "rss-bridge";
+
+  whitelist = pkgs.writeText "rss-bridge_whitelist.txt"
+    (concatStringsSep "\n" cfg.whitelist);
+in
+{
+  options = {
+    services.rss-bridge = {
+      enable = mkEnableOption "rss-bridge";
+
+      user = mkOption {
+        type = types.str;
+        default = "nginx";
+        example = "nginx";
+        description = ''
+          User account under which both the service and the web-application run.
+        '';
+      };
+
+      group = mkOption {
+        type = types.str;
+        default = "nginx";
+        example = "nginx";
+        description = ''
+          Group under which the web-application run.
+        '';
+      };
+
+      pool = mkOption {
+        type = types.str;
+        default = poolName;
+        description = ''
+          Name of existing phpfpm pool that is used to run web-application.
+          If not specified a pool will be created automatically with
+          default values.
+        '';
+      };
+
+      dataDir = mkOption {
+        type = types.str;
+        default = "/var/lib/rss-bridge";
+        description = ''
+          Location in which cache directory will be created.
+          You can put <literal>config.ini.php</literal> in here.
+        '';
+      };
+
+      virtualHost = mkOption {
+        type = types.nullOr types.str;
+        default = "rss-bridge";
+        description = ''
+          Name of the nginx virtualhost to use and setup. If null, do not setup any virtualhost.
+        '';
+      };
+
+      whitelist = mkOption {
+        type = types.listOf types.str;
+        default = [];
+        example = options.literalExample ''
+          [
+            "Facebook"
+            "Instagram"
+            "Twitter"
+          ]
+        '';
+        description = ''
+          List of bridges to be whitelisted.
+          If the list is empty, rss-bridge will use whitelist.default.txt.
+          Use <literal>[ "*" ]</literal> to whitelist all.
+        '';
+      };
+    };
+  };
+
+  config = mkIf cfg.enable {
+    services.phpfpm.pools = mkIf (cfg.pool == poolName) {
+      ${poolName} = {
+        user = cfg.user;
+        settings = mapAttrs (name: mkDefault) {
+          "listen.owner" = cfg.user;
+          "listen.group" = cfg.user;
+          "listen.mode" = "0600";
+          "pm" = "dynamic";
+          "pm.max_children" = 75;
+          "pm.start_servers" = 10;
+          "pm.min_spare_servers" = 5;
+          "pm.max_spare_servers" = 20;
+          "pm.max_requests" = 500;
+          "catch_workers_output" = 1;
+        };
+      };
+    };
+    systemd.tmpfiles.rules = [
+      "d '${cfg.dataDir}/cache' 0750 ${cfg.user} ${cfg.group} - -"
+      (mkIf (cfg.whitelist != []) "L+ ${cfg.dataDir}/whitelist.txt - - - - ${whitelist}")
+      "z '${cfg.dataDir}/config.ini.php' 0750 ${cfg.user} ${cfg.group} - -"
+    ];
+
+    services.nginx = mkIf (cfg.virtualHost != null) {
+      enable = true;
+      virtualHosts = {
+        ${cfg.virtualHost} = {
+          root = "${pkgs.rss-bridge}";
+
+          locations."/" = {
+            tryFiles = "$uri /index.php$is_args$args";
+          };
+
+          locations."~ ^/index.php(/|$)" = {
+            extraConfig = ''
+              include ${pkgs.nginx}/conf/fastcgi_params;
+              fastcgi_split_path_info ^(.+\.php)(/.+)$;
+              fastcgi_pass unix:${config.services.phpfpm.pools.${cfg.pool}.socket};
+              fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
+              fastcgi_param RSSBRIDGE_DATA ${cfg.dataDir};
+            '';
+          };
+        };
+      };
+    };
+  };
+}
diff --git a/nixpkgs/nixos/modules/services/web-apps/sogo.nix b/nixpkgs/nixos/modules/services/web-apps/sogo.nix
index 5f30124dd68a..4610bb96cb5e 100644
--- a/nixpkgs/nixos/modules/services/web-apps/sogo.nix
+++ b/nixpkgs/nixos/modules/services/web-apps/sogo.nix
@@ -77,7 +77,6 @@ in {
         // Paths
         WOSendMail = "/run/wrappers/bin/sendmail";
         SOGoMailSpoolPath = "/var/lib/sogo/spool";
-        SOGoZipPath = "${pkgs.zip}/bin/zip";
         // Enable CSRF protection
         SOGoXSRFValidationEnabled = YES;
         // Remove dates from log (jornald does that)
diff --git a/nixpkgs/nixos/modules/services/web-apps/trilium.nix b/nixpkgs/nixos/modules/services/web-apps/trilium.nix
index 6f47193c62b9..3fa8dad04908 100644
--- a/nixpkgs/nixos/modules/services/web-apps/trilium.nix
+++ b/nixpkgs/nixos/modules/services/web-apps/trilium.nix
@@ -83,7 +83,7 @@ in
     };
   };
 
-  config = lib.mkIf cfg.enable (lib.mkMerge [ 
+  config = lib.mkIf cfg.enable (lib.mkMerge [
   {
     meta.maintainers = with lib.maintainers; [ kampka ];
 
diff --git a/nixpkgs/nixos/modules/services/web-apps/tt-rss.nix b/nixpkgs/nixos/modules/services/web-apps/tt-rss.nix
index 2ea9537b93de..6a29f10d1195 100644
--- a/nixpkgs/nixos/modules/services/web-apps/tt-rss.nix
+++ b/nixpkgs/nixos/modules/services/web-apps/tt-rss.nix
@@ -632,8 +632,6 @@ let
           User = "${cfg.user}";
           Group = "tt_rss";
           ExecStart = "${pkgs.php}/bin/php ${cfg.root}/update.php --daemon --quiet";
-          StandardOutput = "syslog";
-          StandardError = "syslog";
           Restart = "on-failure";
           RestartSec = "60";
           SyslogIdentifier = "tt-rss";
diff --git a/nixpkgs/nixos/modules/services/web-servers/apache-httpd/default.nix b/nixpkgs/nixos/modules/services/web-servers/apache-httpd/default.nix
index 8abee7130d7c..6dd1c85132c9 100644
--- a/nixpkgs/nixos/modules/services/web-servers/apache-httpd/default.nix
+++ b/nixpkgs/nixos/modules/services/web-servers/apache-httpd/default.nix
@@ -6,10 +6,18 @@ let
 
   cfg = config.services.httpd;
 
+  certs = config.security.acme.certs;
+
   runtimeDir = "/run/httpd";
 
   pkg = cfg.package.out;
 
+  apachectl = pkgs.runCommand "apachectl" { meta.priority = -1; } ''
+    mkdir -p $out/bin
+    cp ${pkg}/bin/apachectl $out/bin/apachectl
+    sed -i $out/bin/apachectl -e 's|$HTTPD -t|$HTTPD -t -f ${httpdConf}|'
+  '';
+
   httpdConf = cfg.configFile;
 
   php = cfg.phpPackage.override { apacheHttpd = pkg; };
@@ -20,6 +28,13 @@ let
 
   vhosts = attrValues cfg.virtualHosts;
 
+  # certName is used later on to determine systemd service names.
+  acmeEnabledVhosts = map (hostOpts: hostOpts // {
+    certName = if hostOpts.useACMEHost != null then hostOpts.useACMEHost else hostOpts.hostName;
+  }) (filter (hostOpts: hostOpts.enableACME || hostOpts.useACMEHost != null) vhosts);
+
+  dependentCertNames = unique (map (hostOpts: hostOpts.certName) acmeEnabledVhosts);
+
   mkListenInfo = hostOpts:
     if hostOpts.listen != [] then hostOpts.listen
     else (
@@ -119,13 +134,13 @@ let
 
       useACME = hostOpts.enableACME || hostOpts.useACMEHost != null;
       sslCertDir =
-        if hostOpts.enableACME then config.security.acme.certs.${hostOpts.hostName}.directory
-        else if hostOpts.useACMEHost != null then config.security.acme.certs.${hostOpts.useACMEHost}.directory
+        if hostOpts.enableACME then certs.${hostOpts.hostName}.directory
+        else if hostOpts.useACMEHost != null then certs.${hostOpts.useACMEHost}.directory
         else abort "This case should never happen.";
 
-      sslServerCert = if useACME then "${sslCertDir}/full.pem" else hostOpts.sslServerCert;
+      sslServerCert = if useACME then "${sslCertDir}/fullchain.pem" else hostOpts.sslServerCert;
       sslServerKey = if useACME then "${sslCertDir}/key.pem" else hostOpts.sslServerKey;
-      sslServerChain = if useACME then "${sslCertDir}/fullchain.pem" else hostOpts.sslServerChain;
+      sslServerChain = if useACME then "${sslCertDir}/chain.pem" else hostOpts.sslServerChain;
 
       acmeChallenge = optionalString useACME ''
         Alias /.well-known/acme-challenge/ "${hostOpts.acmeRoot}/.well-known/acme-challenge/"
@@ -341,7 +356,6 @@ let
       cat ${php.phpIni} > $out
       echo "$options" >> $out
     '';
-
 in
 
 
@@ -641,19 +655,41 @@ in
       wwwrun.gid = config.ids.gids.wwwrun;
     };
 
-    security.acme.certs = mapAttrs (name: hostOpts: {
-      user = cfg.user;
-      group = mkDefault cfg.group;
-      email = if hostOpts.adminAddr != null then hostOpts.adminAddr else cfg.adminAddr;
-      webroot = hostOpts.acmeRoot;
-      extraDomains = genAttrs hostOpts.serverAliases (alias: null);
-      postRun = "systemctl reload httpd.service";
-    }) (filterAttrs (name: hostOpts: hostOpts.enableACME) cfg.virtualHosts);
-
-    environment.systemPackages = [ pkg ];
+    security.acme.certs = let
+      acmePairs = map (hostOpts: nameValuePair hostOpts.hostName {
+        group = mkDefault cfg.group;
+        webroot = hostOpts.acmeRoot;
+        extraDomainNames = hostOpts.serverAliases;
+        # Use the vhost-specific email address if provided, otherwise let
+        # security.acme.email or security.acme.certs.<cert>.email be used.
+        email = mkOverride 2000 (if hostOpts.adminAddr != null then hostOpts.adminAddr else cfg.adminAddr);
+      # Filter for enableACME-only vhosts. Don't want to create dud certs
+      }) (filter (hostOpts: hostOpts.useACMEHost == null) acmeEnabledVhosts);
+    in listToAttrs acmePairs;
+
+    environment.systemPackages = [
+      apachectl
+      pkg
+    ];
 
-    # required for "apachectl configtest"
-    environment.etc."httpd/httpd.conf".source = httpdConf;
+    services.logrotate = optionalAttrs (cfg.logFormat != "none") {
+      enable = mkDefault true;
+      paths.httpd = {
+        path = "${cfg.logDir}/*.log";
+        user = cfg.user;
+        group = cfg.group;
+        frequency = "daily";
+        keep = 28;
+        extraConfig = ''
+          sharedscripts
+          compress
+          delaycompress
+          postrotate
+            systemctl reload httpd.service > /dev/null 2>/dev/null || true
+          endscript
+        '';
+      };
+    };
 
     services.httpd.phpOptions =
       ''
@@ -699,15 +735,12 @@ in
           "Z '${cfg.logDir}' - ${svc.User} ${svc.Group}"
         ];
 
-    systemd.services.httpd =
-      let
-        vhostsACME = filter (hostOpts: hostOpts.enableACME) vhosts;
-      in
-      { description = "Apache HTTPD";
-
+    systemd.services.httpd = {
+        description = "Apache HTTPD";
         wantedBy = [ "multi-user.target" ];
-        wants = concatLists (map (hostOpts: [ "acme-${hostOpts.hostName}.service" "acme-selfsigned-${hostOpts.hostName}.service" ]) vhostsACME);
-        after = [ "network.target" "fs.target" ] ++ map (hostOpts: "acme-selfsigned-${hostOpts.hostName}.service") vhostsACME;
+        wants = concatLists (map (certName: [ "acme-finished-${certName}.target" ]) dependentCertNames);
+        after = [ "network.target" ] ++ map (certName: "acme-selfsigned-${certName}.service") dependentCertNames;
+        before = map (certName: "acme-${certName}.service") dependentCertNames;
 
         path = [ pkg pkgs.coreutils pkgs.gnugrep ];
 
@@ -741,5 +774,31 @@ in
         };
       };
 
+    # postRun hooks on cert renew can't be used to restart Apache since renewal
+    # runs as the unprivileged acme user. sslTargets are added to wantedBy + before
+    # which allows the acme-finished-$cert.target to signify the successful updating
+    # of certs end-to-end.
+    systemd.services.httpd-config-reload = let
+      sslServices = map (certName: "acme-${certName}.service") dependentCertNames;
+      sslTargets = map (certName: "acme-finished-${certName}.target") dependentCertNames;
+    in mkIf (sslServices != []) {
+      wantedBy = sslServices ++ [ "multi-user.target" ];
+      # Before the finished targets, after the renew services.
+      # This service might be needed for HTTP-01 challenges, but we only want to confirm
+      # certs are updated _after_ config has been reloaded.
+      before = sslTargets;
+      after = sslServices;
+      # Block reloading if not all certs exist yet.
+      # Happens when config changes add new vhosts/certs.
+      unitConfig.ConditionPathExists = map (certName: certs.${certName}.directory + "/fullchain.pem") dependentCertNames;
+      serviceConfig = {
+        Type = "oneshot";
+        TimeoutSec = 60;
+        ExecCondition = "/run/current-system/systemd/bin/systemctl -q is-active httpd.service";
+        ExecStartPre = "${pkg}/bin/httpd -f ${httpdConf} -t";
+        ExecStart = "/run/current-system/systemd/bin/systemctl reload httpd.service";
+      };
+    };
+
   };
 }
diff --git a/nixpkgs/nixos/modules/services/web-servers/caddy.nix b/nixpkgs/nixos/modules/services/web-servers/caddy.nix
index 0e6e10a5f47d..dda26fe491a1 100644
--- a/nixpkgs/nixos/modules/services/web-servers/caddy.nix
+++ b/nixpkgs/nixos/modules/services/web-servers/caddy.nix
@@ -5,6 +5,26 @@ with lib;
 let
   cfg = config.services.caddy;
   configFile = pkgs.writeText "Caddyfile" cfg.config;
+
+  # v2-specific options
+  isCaddy2 = versionAtLeast cfg.package.version "2.0";
+  tlsConfig = {
+    apps.tls.automation.policies = [{
+      issuer = {
+        inherit (cfg) ca email;
+        module = "acme";
+      };
+    }];
+  };
+
+  adaptedConfig = pkgs.runCommand "caddy-config-adapted.json" { } ''
+    ${cfg.package}/bin/caddy adapt \
+      --config ${configFile} --adapter ${cfg.adapter} > $out
+  '';
+  tlsJSON = pkgs.writeText "tls.json" (builtins.toJSON tlsConfig);
+  configJSON = pkgs.runCommand "caddy-config.json" { } ''
+    ${pkgs.jq}/bin/jq -s '.[0] * .[1]' ${adaptedConfig} ${tlsJSON} > $out
+  '';
 in {
   options.services.caddy = {
     enable = mkEnableOption "Caddy web server";
@@ -13,15 +33,26 @@ in {
       default = "";
       example = ''
         example.com {
-        gzip
-        minify
-        log syslog
-
-        root /srv/http
+          encode gzip
+          log
+          root /srv/http
         }
       '';
       type = types.lines;
-      description = "Verbatim Caddyfile to use";
+      description = ''
+        Verbatim Caddyfile to use.
+        Caddy v2 supports multiple config formats via adapters (see <option>services.caddy.adapter</option>).
+      '';
+    };
+
+    adapter = mkOption {
+      default = "caddyfile";
+      example = "nginx";
+      type = types.str;
+      description = ''
+        Name of the config adapter to use. Not applicable to Caddy v1.
+        See https://caddyserver.com/docs/config-adapters for the full list.
+      '';
     };
 
     ca = mkOption {
@@ -50,33 +81,46 @@ in {
         The data directory, for storing certificates. Before 17.09, this
         would create a .caddy directory. With 17.09 the contents of the
         .caddy directory are in the specified data directory instead.
+
+        Caddy v2 replaced CADDYPATH with XDG directories.
+        See https://caddyserver.com/docs/conventions#file-locations.
       '';
     };
 
     package = mkOption {
       default = pkgs.caddy;
       defaultText = "pkgs.caddy";
+      example = "pkgs.caddy1";
       type = types.package;
-      description = "Caddy package to use.";
+      description = ''
+        Caddy package to use.
+        To use Caddy v1 (obsolete), set this to <literal>pkgs.caddy1</literal>.
+      '';
     };
   };
 
   config = mkIf cfg.enable {
     systemd.services.caddy = {
       description = "Caddy web server";
-      # upstream unit: https://github.com/caddyserver/caddy/blob/master/dist/init/linux-systemd/caddy.service
+      # upstream unit: https://github.com/caddyserver/dist/blob/master/init/caddy.service
       after = [ "network-online.target" ];
       wants = [ "network-online.target" ]; # systemd-networkd-wait-online.service
       wantedBy = [ "multi-user.target" ];
-      environment = mkIf (versionAtLeast config.system.stateVersion "17.09")
+      environment = mkIf (versionAtLeast config.system.stateVersion "17.09" && !isCaddy2)
         { CADDYPATH = cfg.dataDir; };
       serviceConfig = {
-        ExecStart = ''
+        ExecStart = if isCaddy2 then ''
+          ${cfg.package}/bin/caddy run --config ${configJSON}
+        '' else ''
           ${cfg.package}/bin/caddy -log stdout -log-timestamps=false \
             -root=/var/tmp -conf=${configFile} \
             -ca=${cfg.ca} -email=${cfg.email} ${optionalString cfg.agree "-agree"}
         '';
-        ExecReload = "${pkgs.coreutils}/bin/kill -USR1 $MAINPID";
+        ExecReload =
+          if isCaddy2 then
+            "${cfg.package}/bin/caddy reload --config ${configJSON}"
+          else
+            "${pkgs.coreutils}/bin/kill -USR1 $MAINPID";
         Type = "simple";
         User = "caddy";
         Group = "caddy";
diff --git a/nixpkgs/nixos/modules/services/web-servers/jboss/builder.sh b/nixpkgs/nixos/modules/services/web-servers/jboss/builder.sh
index 2eb89a90f67d..0e5af324c13f 100644
--- a/nixpkgs/nixos/modules/services/web-servers/jboss/builder.sh
+++ b/nixpkgs/nixos/modules/services/web-servers/jboss/builder.sh
@@ -28,11 +28,11 @@ stop()
 if test "\$1" = start
 then
   trap stop 15
-  
+
   start
 elif test "\$1" = stop
 then
-  stop  
+  stop
 elif test "\$1" = init
 then
   echo "Are you sure you want to create a new server instance (old server instance will be lost!)?"
@@ -42,21 +42,21 @@ then
   then
     exit 1
   fi
-  
+
   rm -rf $serverDir
   mkdir -p $serverDir
   cd $serverDir
   cp -av $jboss/server/default .
   sed -i -e "s|deploy/|$deployDir|" default/conf/jboss-service.xml
-  
+
   if ! test "$useJK" = ""
   then
     sed -i -e 's|<attribute name="UseJK">false</attribute>|<attribute name="UseJK">true</attribute>|' default/deploy/jboss-web.deployer/META-INF/jboss-service.xml
     sed -i -e 's|<Engine name="jboss.web" defaultHost="localhost">|<Engine name="jboss.web" defaultHost="localhost" jvmRoute="node1">|' default/deploy/jboss-web.deployer/server.xml
   fi
-  
+
   # Make files accessible for the server user
-  
+
   chown -R $user $serverDir
   for i in \`find $serverDir -type d\`
   do
diff --git a/nixpkgs/nixos/modules/services/web-servers/meguca.nix b/nixpkgs/nixos/modules/services/web-servers/meguca.nix
deleted file mode 100644
index 5a00070dc941..000000000000
--- a/nixpkgs/nixos/modules/services/web-servers/meguca.nix
+++ /dev/null
@@ -1,174 +0,0 @@
-{ config, lib, pkgs, ... }:
-
-let
-  cfg = config.services.meguca;
-  postgres = config.services.postgresql;
-in with lib; {
-  options.services.meguca = {
-    enable = mkEnableOption "meguca";
-
-    dataDir = mkOption {
-      type = types.path;
-      default = "/var/lib/meguca";
-      example = "/home/okina/meguca";
-      description = "Location where meguca stores it's database and links.";
-    };
-
-    password = mkOption {
-      type = types.str;
-      default = "meguca";
-      example = "dumbpass";
-      description = "Password for the meguca database.";
-    };
-
-    passwordFile = mkOption {
-      type = types.path;
-      default = "/run/keys/meguca-password-file";
-      example = "/home/okina/meguca/keys/pass";
-      description = "Password file for the meguca database.";
-    };
-
-    reverseProxy = mkOption {
-      type = types.nullOr types.str;
-      default = null;
-      example = "192.168.1.5";
-      description = "Reverse proxy IP.";
-    };
-
-    sslCertificate = mkOption {
-      type = types.nullOr types.str;
-      default = null;
-      example = "/home/okina/meguca/ssl.cert";
-      description = "Path to the SSL certificate.";
-    };
-
-    listenAddress = mkOption {
-      type = types.nullOr types.str;
-      default = null;
-      example = "127.0.0.1:8000";
-      description = "Listen on a specific IP address and port.";
-    };
-
-    cacheSize = mkOption {
-      type = types.nullOr types.int;
-      default = null;
-      example = 256;
-      description = "Cache size in MB.";
-    };
-
-    postgresArgs = mkOption {
-      type = types.str;
-      example = "user=meguca password=dumbpass dbname=meguca sslmode=disable";
-      description = "Postgresql connection arguments.";
-    };
-
-    postgresArgsFile = mkOption {
-      type = types.path;
-      default = "/run/keys/meguca-postgres-args";
-      example = "/home/okina/meguca/keys/postgres";
-      description = "Postgresql connection arguments file.";
-    };
-
-    compressTraffic = mkOption {
-      type = types.bool;
-      default = false;
-      description = "Compress all traffic with gzip.";
-    };
-
-    assumeReverseProxy = mkOption {
-      type = types.bool;
-      default = false;
-      description = "Assume the server is behind a reverse proxy, when resolving client IPs.";
-    };
-
-    httpsOnly = mkOption {
-      type = types.bool;
-      default = false;
-      description = "Serve and listen only through HTTPS.";
-    };
-
-    videoPaths = mkOption {
-      type = types.listOf types.path;
-      default = [];
-      example = [ "/home/okina/Videos/tehe_pero.webm" ];
-      description = "Videos that will be symlinked into www/videos.";
-    };
-  };
-
-  config = mkIf cfg.enable {
-    security.sudo.enable = cfg.enable;
-    services.postgresql.enable = cfg.enable;
-    services.postgresql.package = pkgs.postgresql_11;
-    services.meguca.passwordFile = mkDefault (pkgs.writeText "meguca-password-file" cfg.password);
-    services.meguca.postgresArgsFile = mkDefault (pkgs.writeText "meguca-postgres-args" cfg.postgresArgs);
-    services.meguca.postgresArgs = mkDefault "user=meguca password=${cfg.password} dbname=meguca sslmode=disable";
-
-    systemd.services.meguca = {
-      description = "meguca";
-      after = [ "network.target" "postgresql.service" ];
-      wantedBy = [ "multi-user.target" ];
-
-      preStart = ''
-        # Ensure folder exists or create it and links and permissions are correct
-        mkdir -p ${escapeShellArg cfg.dataDir}/www
-        rm -rf ${escapeShellArg cfg.dataDir}/www/videos
-        ln -sf ${pkgs.meguca}/share/meguca/www/* ${escapeShellArg cfg.dataDir}/www
-        unlink ${escapeShellArg cfg.dataDir}/www/videos
-        mkdir -p ${escapeShellArg cfg.dataDir}/www/videos
-
-        for vid in ${escapeShellArg cfg.videoPaths}; do
-          ln -sf $vid ${escapeShellArg cfg.dataDir}/www/videos
-        done
-
-        chmod 750 ${escapeShellArg cfg.dataDir}
-        chown -R meguca:meguca ${escapeShellArg cfg.dataDir}
-
-        # Ensure the database is correct or create it
-        ${pkgs.sudo}/bin/sudo -u ${postgres.superUser} ${postgres.package}/bin/createuser \
-          -SDR meguca || true
-        ${pkgs.sudo}/bin/sudo -u ${postgres.superUser} ${postgres.package}/bin/createdb \
-          -T template0 -E UTF8 -O meguca meguca || true
-        ${pkgs.sudo}/bin/sudo -u meguca ${postgres.package}/bin/psql \
-          -c "ALTER ROLE meguca WITH PASSWORD '$(cat ${escapeShellArg cfg.passwordFile})';" || true
-      '';
-
-    script = ''
-      cd ${escapeShellArg cfg.dataDir}
-
-      ${pkgs.meguca}/bin/meguca -d "$(cat ${escapeShellArg cfg.postgresArgsFile})"''
-      + optionalString (cfg.reverseProxy != null) " -R ${cfg.reverseProxy}"
-      + optionalString (cfg.sslCertificate != null) " -S ${cfg.sslCertificate}"
-      + optionalString (cfg.listenAddress != null) " -a ${cfg.listenAddress}"
-      + optionalString (cfg.cacheSize != null) " -c ${toString cfg.cacheSize}"
-      + optionalString (cfg.compressTraffic) " -g"
-      + optionalString (cfg.assumeReverseProxy) " -r"
-      + optionalString (cfg.httpsOnly) " -s" + " start";
-
-      serviceConfig = {
-        PermissionsStartOnly = true;
-        Type = "forking";
-        User = "meguca";
-        Group = "meguca";
-        ExecStop = "${pkgs.meguca}/bin/meguca stop";
-      };
-    };
-
-    users = {
-      groups.meguca.gid = config.ids.gids.meguca;
-
-      users.meguca = {
-        description = "meguca server service user";
-        home = cfg.dataDir;
-        createHome = true;
-        group = "meguca";
-        uid = config.ids.uids.meguca;
-      };
-    };
-  };
-
-  imports = [
-    (mkRenamedOptionModule [ "services" "meguca" "baseDir" ] [ "services" "meguca" "dataDir" ])
-  ];
-
-  meta.maintainers = with maintainers; [ chiiruno ];
-}
diff --git a/nixpkgs/nixos/modules/services/web-servers/molly-brown.nix b/nixpkgs/nixos/modules/services/web-servers/molly-brown.nix
new file mode 100644
index 000000000000..e9052a184b2d
--- /dev/null
+++ b/nixpkgs/nixos/modules/services/web-servers/molly-brown.nix
@@ -0,0 +1,117 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.services.molly-brown;
+
+  settingsType = with types;
+    attrsOf (oneOf [
+      int
+      str
+      (listOf str)
+      (attrsOf (oneOf [ int str (listOf str) (attrsOf str) ]))
+    ]) // {
+      description = "primitive expression convertable to TOML";
+    };
+
+  configFile = pkgs.runCommand "molly-brown.toml" {
+    buildInputs = [ pkgs.remarshal ];
+    preferLocalBuild = true;
+    passAsFile = [ "settings" ];
+    settings = builtins.toJSON cfg.settings;
+  } "remarshal -if json -of toml < $settingsPath > $out";
+in {
+
+  options.services.molly-brown = {
+
+    enable = mkEnableOption "Molly-Brown Gemini server";
+
+    port = mkOption {
+      default = 1965;
+      type = types.port;
+      description = ''
+        TCP port for molly-brown to bind to.
+      '';
+    };
+
+    hostName = mkOption {
+      type = types.str;
+      example = literalExample "config.networking.hostName";
+      default = config.networking.hostName;
+      description = ''
+        The hostname to respond to requests for. Requests for URLs with
+        other hosts will result in a status 53 (PROXY REQUEST REFUSED)
+        response.
+      '';
+    };
+
+    certPath = mkOption {
+      type = types.path;
+      example = "/var/lib/acme/example.com/cert.pem";
+      description = ''
+        Path to TLS certificate. An ACME certificate and key may be
+        shared with an HTTP server, but only if molly-brown has
+        permissions allowing it to read such keys.
+
+        As an example:
+        <programlisting>
+        security.acme.certs."example.com".allowKeysForGroup = true;
+        systemd.services.molly-brown.serviceConfig.SupplementaryGroups =
+          [ config.security.acme.certs."example.com".group ];
+        </programlisting>
+      '';
+    };
+
+    keyPath = mkOption {
+      type = types.path;
+      example = "/var/lib/acme/example.com/key.pem";
+      description = "Path to TLS key. See <option>CertPath</option>.";
+    };
+
+    docBase = mkOption {
+      type = types.path;
+      example = "/var/lib/molly-brown";
+      description = "Base directory for Gemini content.";
+    };
+
+    settings = mkOption {
+      type = settingsType;
+      default = { };
+      description = ''
+        molly-brown configuration. Refer to
+        <link xlink:href="https://tildegit.org/solderpunk/molly-brown/src/branch/master/example.conf"/>
+        for details on supported values.
+      '';
+    };
+
+  };
+
+  config = mkIf cfg.enable {
+
+    services.molly-brown.settings = let logDir = "/var/log/molly-brown";
+    in {
+      Port = cfg.port;
+      Hostname = cfg.hostName;
+      CertPath = cfg.certPath;
+      KeyPath = cfg.keyPath;
+      DocBase = cfg.docBase;
+      AccessLog = "${logDir}/access.log";
+      ErrorLog = "${logDir}/error.log";
+    };
+
+    systemd.services.molly-brown = {
+      description = "Molly Brown gemini server";
+      after = [ "network.target" ];
+      wantedBy = [ "multi-user.target" ];
+      serviceConfig = {
+        DynamicUser = true;
+        LogsDirectory = "molly-brown";
+        ExecStart = "${pkgs.molly-brown}/bin/molly-brown -c ${configFile}";
+        Restart = "always";
+      };
+    };
+
+  };
+
+}
diff --git a/nixpkgs/nixos/modules/services/web-servers/nginx/default.nix b/nixpkgs/nixos/modules/services/web-servers/nginx/default.nix
index 04d66ffd25c6..0cb84de793e0 100644
--- a/nixpkgs/nixos/modules/services/web-servers/nginx/default.nix
+++ b/nixpkgs/nixos/modules/services/web-servers/nginx/default.nix
@@ -6,23 +6,23 @@ let
   cfg = config.services.nginx;
   certs = config.security.acme.certs;
   vhostsConfigs = mapAttrsToList (vhostName: vhostConfig: vhostConfig) virtualHosts;
-  acmeEnabledVhosts = filter (vhostConfig: vhostConfig.enableACME && vhostConfig.useACMEHost == null) vhostsConfigs;
+  acmeEnabledVhosts = filter (vhostConfig: vhostConfig.enableACME || vhostConfig.useACMEHost != null) vhostsConfigs;
+  dependentCertNames = unique (map (hostOpts: hostOpts.certName) acmeEnabledVhosts);
   virtualHosts = mapAttrs (vhostName: vhostConfig:
     let
       serverName = if vhostConfig.serverName != null
         then vhostConfig.serverName
         else vhostName;
+      certName = if vhostConfig.useACMEHost != null
+        then vhostConfig.useACMEHost
+        else serverName;
     in
     vhostConfig // {
-      inherit serverName;
-    } // (optionalAttrs vhostConfig.enableACME {
-      sslCertificate = "${certs.${serverName}.directory}/fullchain.pem";
-      sslCertificateKey = "${certs.${serverName}.directory}/key.pem";
-      sslTrustedCertificate = "${certs.${serverName}.directory}/full.pem";
-    }) // (optionalAttrs (vhostConfig.useACMEHost != null) {
-      sslCertificate = "${certs.${vhostConfig.useACMEHost}.directory}/fullchain.pem";
-      sslCertificateKey = "${certs.${vhostConfig.useACMEHost}.directory}/key.pem";
-      sslTrustedCertificate = "${certs.${vhostConfig.useACMEHost}.directory}/fullchain.pem";
+      inherit serverName certName;
+    } // (optionalAttrs (vhostConfig.enableACME || vhostConfig.useACMEHost != null) {
+      sslCertificate = "${certs.${certName}.directory}/fullchain.pem";
+      sslCertificateKey = "${certs.${certName}.directory}/key.pem";
+      sslTrustedCertificate = "${certs.${certName}.directory}/chain.pem";
     })
   ) cfg.virtualHosts;
   enableIPv6 = config.networking.enableIPv6;
@@ -494,14 +494,6 @@ in
         '';
       };
 
-      enableSandbox = mkOption {
-        default = false;
-        type = types.bool;
-        description = ''
-          Starting Nginx web server with additional sandbox/hardening options.
-        '';
-      };
-
       user = mkOption {
         type = types.str;
         default = "nginx";
@@ -722,8 +714,12 @@ in
     systemd.services.nginx = {
       description = "Nginx Web Server";
       wantedBy = [ "multi-user.target" ];
-      wants = concatLists (map (vhostConfig: ["acme-${vhostConfig.serverName}.service" "acme-selfsigned-${vhostConfig.serverName}.service"]) acmeEnabledVhosts);
-      after = [ "network.target" ] ++ map (vhostConfig: "acme-selfsigned-${vhostConfig.serverName}.service") acmeEnabledVhosts;
+      wants = concatLists (map (certName: [ "acme-finished-${certName}.target" ]) dependentCertNames);
+      after = [ "network.target" ] ++ map (certName: "acme-selfsigned-${certName}.service") dependentCertNames;
+      # Nginx needs to be started in order to be able to request certificates
+      # (it's hosting the acme challenge after all)
+      # This fixes https://github.com/NixOS/nixpkgs/issues/81842
+      before = map (certName: "acme-${certName}.service") dependentCertNames;
       stopIfChanged = false;
       preStart = ''
         ${cfg.preStart}
@@ -731,7 +727,10 @@ in
       '';
       serviceConfig = {
         ExecStart = execCommand;
-        ExecReload = "${pkgs.coreutils}/bin/kill -HUP $MAINPID";
+        ExecReload = [
+          "${execCommand} -t"
+          "${pkgs.coreutils}/bin/kill -HUP $MAINPID"
+        ];
         Restart = "always";
         RestartSec = "10s";
         StartLimitInterval = "1min";
@@ -752,7 +751,6 @@ in
         CapabilityBoundingSet = [ "CAP_NET_BIND_SERVICE" "CAP_SYS_RESOURCE" ];
         # Security
         NoNewPrivileges = true;
-      } // optionalAttrs cfg.enableSandbox {
         # Sandboxing
         ProtectSystem = "strict";
         ProtectHome = mkDefault true;
@@ -777,38 +775,41 @@ in
       source = configFile;
     };
 
-    systemd.services.nginx-config-reload = mkIf cfg.enableReload {
-      wants = [ "nginx.service" ];
-      wantedBy = [ "multi-user.target" ];
-      restartTriggers = [ configFile ];
-      # commented, because can cause extra delays during activate for this config:
-      #      services.nginx.virtualHosts."_".locations."/".proxyPass = "http://blabla:3000";
-      # stopIfChanged = false;
-      serviceConfig.Type = "oneshot";
-      serviceConfig.TimeoutSec = 60;
-      script = ''
-        if /run/current-system/systemd/bin/systemctl -q is-active nginx.service ; then
-          ${execCommand} -t && \
-            /run/current-system/systemd/bin/systemctl reload nginx.service
-        fi
-      '';
-      serviceConfig.RemainAfterExit = true;
+    # postRun hooks on cert renew can't be used to restart Nginx since renewal
+    # runs as the unprivileged acme user. sslTargets are added to wantedBy + before
+    # which allows the acme-finished-$cert.target to signify the successful updating
+    # of certs end-to-end.
+    systemd.services.nginx-config-reload = let
+      sslServices = map (certName: "acme-${certName}.service") dependentCertNames;
+      sslTargets = map (certName: "acme-finished-${certName}.target") dependentCertNames;
+    in mkIf (cfg.enableReload || sslServices != []) {
+      wants = optionals (cfg.enableReload) [ "nginx.service" ];
+      wantedBy = sslServices ++ [ "multi-user.target" ];
+      # Before the finished targets, after the renew services.
+      # This service might be needed for HTTP-01 challenges, but we only want to confirm
+      # certs are updated _after_ config has been reloaded.
+      before = sslTargets;
+      after = sslServices;
+      restartTriggers = optionals (cfg.enableReload) [ configFile ];
+      # Block reloading if not all certs exist yet.
+      # Happens when config changes add new vhosts/certs.
+      unitConfig.ConditionPathExists = optionals (sslServices != []) (map (certName: certs.${certName}.directory + "/fullchain.pem") dependentCertNames);
+      serviceConfig = {
+        Type = "oneshot";
+        TimeoutSec = 60;
+        ExecCondition = "/run/current-system/systemd/bin/systemctl -q is-active nginx.service";
+        ExecStart = "/run/current-system/systemd/bin/systemctl reload nginx.service";
+      };
     };
 
-    security.acme.certs = filterAttrs (n: v: v != {}) (
-      let
-        acmePairs = map (vhostConfig: { name = vhostConfig.serverName; value = {
-            user = cfg.user;
-            group = lib.mkDefault cfg.group;
-            webroot = vhostConfig.acmeRoot;
-            extraDomains = genAttrs vhostConfig.serverAliases (alias: null);
-            postRun = ''
-              /run/current-system/systemd/bin/systemctl reload nginx
-            '';
-          }; }) acmeEnabledVhosts;
-      in
-        listToAttrs acmePairs
-    );
+    security.acme.certs = let
+      acmePairs = map (vhostConfig: nameValuePair vhostConfig.serverName {
+        group = mkDefault cfg.group;
+        webroot = vhostConfig.acmeRoot;
+        extraDomainNames = vhostConfig.serverAliases;
+      # Filter for enableACME-only vhosts. Don't want to create dud certs
+      }) (filter (vhostConfig: vhostConfig.useACMEHost == null) acmeEnabledVhosts);
+    in listToAttrs acmePairs;
 
     users.users = optionalAttrs (cfg.user == "nginx") {
       nginx = {
diff --git a/nixpkgs/nixos/modules/services/web-servers/phpfpm/default.nix b/nixpkgs/nixos/modules/services/web-servers/phpfpm/default.nix
index d090885a8ca5..759eebf768db 100644
--- a/nixpkgs/nixos/modules/services/web-servers/phpfpm/default.nix
+++ b/nixpkgs/nixos/modules/services/web-servers/phpfpm/default.nix
@@ -277,6 +277,7 @@ in {
           ExecReload = "${pkgs.coreutils}/bin/kill -USR2 $MAINPID";
           RuntimeDirectory = "phpfpm";
           RuntimeDirectoryPreserve = true; # Relevant when multiple processes are running
+          Restart = "always";
         };
       }
     ) cfg.pools;
diff --git a/nixpkgs/nixos/modules/services/web-servers/shellinabox.nix b/nixpkgs/nixos/modules/services/web-servers/shellinabox.nix
index 58a02ac59c35..c7c51f873eba 100644
--- a/nixpkgs/nixos/modules/services/web-servers/shellinabox.nix
+++ b/nixpkgs/nixos/modules/services/web-servers/shellinabox.nix
@@ -51,7 +51,7 @@ in
           Whether or not to enable SSL (https) support.
         '';
       };
-        
+
       certDirectory = mkOption {
         type = types.nullOr types.path;
         default = null;
diff --git a/nixpkgs/nixos/modules/services/web-servers/unit/default.nix b/nixpkgs/nixos/modules/services/web-servers/unit/default.nix
index 989866144e1e..894271d1e55e 100644
--- a/nixpkgs/nixos/modules/services/web-servers/unit/default.nix
+++ b/nixpkgs/nixos/modules/services/web-servers/unit/default.nix
@@ -102,7 +102,7 @@ in {
         PIDFile = "/run/unit/unit.pid";
         ExecStart = ''
           ${cfg.package}/bin/unitd --control 'unix:/run/unit/control.unit.sock' --pid '/run/unit/unit.pid' \
-                                   --log '${cfg.logDir}/unit.log' --state '${cfg.stateDir}' \
+                                   --log '${cfg.logDir}/unit.log' --state '${cfg.stateDir}' --tmp '/tmp' \
                                    --user ${cfg.user} --group ${cfg.group}
         '';
         ExecStop = ''
@@ -120,9 +120,12 @@ in {
         ProtectHome = true;
         PrivateTmp = true;
         PrivateDevices = true;
+        PrivateUsers = false;
         ProtectHostname = true;
+        ProtectClock = true;
         ProtectKernelTunables = true;
         ProtectKernelModules = true;
+        ProtectKernelLogs = true;
         ProtectControlGroups = true;
         RestrictAddressFamilies = [ "AF_UNIX" "AF_INET" "AF_INET6" ];
         LockPersonality = true;
diff --git a/nixpkgs/nixos/modules/services/x11/colord.nix b/nixpkgs/nixos/modules/services/x11/colord.nix
index cf113ad2af8c..31ccee6aa33f 100644
--- a/nixpkgs/nixos/modules/services/x11/colord.nix
+++ b/nixpkgs/nixos/modules/services/x11/colord.nix
@@ -26,7 +26,7 @@ in {
 
     systemd.packages = [ pkgs.colord ];
 
-    environment.etc."tmpfiles.d/colord.conf".source = "${pkgs.colord}/lib/tmpfiles.d/colord.conf";
+    systemd.tmpfiles.packages = [ pkgs.colord ];
 
     users.users.colord = {
       isSystemUser = true;
diff --git a/nixpkgs/nixos/modules/services/x11/desktop-managers/cinnamon.nix b/nixpkgs/nixos/modules/services/x11/desktop-managers/cinnamon.nix
new file mode 100644
index 000000000000..a404143a03d4
--- /dev/null
+++ b/nixpkgs/nixos/modules/services/x11/desktop-managers/cinnamon.nix
@@ -0,0 +1,205 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+
+  cfg = config.services.xserver.desktopManager.cinnamon;
+  serviceCfg = config.services.cinnamon;
+
+  nixos-gsettings-overrides = pkgs.cinnamon.cinnamon-gsettings-overrides.override {
+    extraGSettingsOverridePackages = cfg.extraGSettingsOverridePackages;
+    extraGSettingsOverrides = cfg.extraGSettingsOverrides;
+  };
+
+in
+
+{
+  options = {
+    services.cinnamon = {
+      apps.enable = mkEnableOption "Cinnamon default applications";
+    };
+
+    services.xserver.desktopManager.cinnamon = {
+      enable = mkEnableOption "the cinnamon desktop manager";
+
+      sessionPath = mkOption {
+        default = [];
+        example = literalExample "[ pkgs.gnome3.gpaste ]";
+        description = ''
+          Additional list of packages to be added to the session search path.
+          Useful for GSettings-conditional autostart.
+
+          Note that this should be a last resort; patching the package is preferred (see GPaste).
+        '';
+      };
+
+      extraGSettingsOverrides = mkOption {
+        default = "";
+        type = types.lines;
+        description = "Additional gsettings overrides.";
+      };
+
+      extraGSettingsOverridePackages = mkOption {
+        default = [];
+        type = types.listOf types.path;
+        description = "List of packages for which gsettings are overridden.";
+      };
+    };
+
+    environment.cinnamon.excludePackages = mkOption {
+      default = [];
+      example = literalExample "[ pkgs.cinnamon.blueberry ]";
+      type = types.listOf types.package;
+      description = "Which packages cinnamon should exclude from the default environment";
+    };
+
+  };
+
+  config = mkMerge [
+    (mkIf (cfg.enable && config.services.xserver.displayManager.lightdm.enable && config.services.xserver.displayManager.lightdm.greeters.gtk.enable) {
+      services.xserver.displayManager.lightdm.greeters.gtk.extraConfig = mkDefault (builtins.readFile "${pkgs.cinnamon.mint-artwork}/etc/lightdm/lightdm-gtk-greeter.conf.d/99_linuxmint.conf");
+      })
+
+    (mkIf cfg.enable {
+      services.xserver.displayManager.sessionPackages = [ pkgs.cinnamon.cinnamon-common ];
+
+      services.xserver.displayManager.sessionCommands = ''
+        if test "$XDG_CURRENT_DESKTOP" = "Cinnamon"; then
+            true
+            ${concatMapStrings (p: ''
+              if [ -d "${p}/share/gsettings-schemas/${p.name}" ]; then
+                export XDG_DATA_DIRS=$XDG_DATA_DIRS''${XDG_DATA_DIRS:+:}${p}/share/gsettings-schemas/${p.name}
+              fi
+
+              if [ -d "${p}/lib/girepository-1.0" ]; then
+                export GI_TYPELIB_PATH=$GI_TYPELIB_PATH''${GI_TYPELIB_PATH:+:}${p}/lib/girepository-1.0
+                export LD_LIBRARY_PATH=$LD_LIBRARY_PATH''${LD_LIBRARY_PATH:+:}${p}/lib
+              fi
+            '') cfg.sessionPath}
+        fi
+      '';
+
+      # Default services
+      hardware.bluetooth.enable = mkDefault true;
+      hardware.pulseaudio.enable = mkDefault true;
+      security.polkit.enable = true;
+      services.accounts-daemon.enable = true;
+      services.system-config-printer.enable = (mkIf config.services.printing.enable (mkDefault true));
+      services.dbus.packages = with pkgs.cinnamon; [
+        cinnamon-common
+        cinnamon-screensaver
+        nemo
+        xapps
+      ];
+      services.cinnamon.apps.enable = mkDefault true;
+      services.gnome3.glib-networking.enable = true;
+      services.gnome3.gnome-keyring.enable = true;
+      services.gvfs.enable = true;
+      services.udisks2.enable = true;
+      services.upower.enable = mkDefault config.powerManagement.enable;
+      services.xserver.libinput.enable = mkDefault true;
+      services.xserver.updateDbusEnvironment = true;
+      networking.networkmanager.enable = mkDefault true;
+
+      # Enable colord server
+      services.colord.enable = true;
+
+      # Enable dconf
+      programs.dconf.enable = true;
+
+      # Enable org.a11y.Bus
+      services.gnome3.at-spi2-core.enable = true;
+
+      # Fix lockscreen
+      security.pam.services = {
+        cinnamon-screensaver = {};
+      };
+
+      environment.systemPackages = with pkgs.cinnamon // pkgs; [
+        desktop-file-utils
+        nixos-artwork.wallpapers.simple-dark-gray
+        onboard
+        sound-theme-freedesktop
+
+        # common-files
+        cinnamon-common
+        cinnamon-session
+        cinnamon-desktop
+        cinnamon-menus
+
+        # utils needed by some scripts
+        killall
+
+        # session requirements
+        cinnamon-screensaver
+        # cinnamon-killer-daemon: provided by cinnamon-common
+        gnome3.networkmanagerapplet # session requirement - also nm-applet not needed
+
+        # packages
+        nemo
+        cinnamon-control-center
+        cinnamon-settings-daemon
+        gnome3.libgnomekbd
+        orca
+
+        # theme
+        gnome3.adwaita-icon-theme
+        hicolor-icon-theme
+        gnome3.gnome-themes-extra
+        gtk3.out
+        mint-artwork
+        mint-themes
+        mint-x-icons
+        mint-y-icons
+        vanilla-dmz
+
+        # other
+        glib # for gsettings
+        shared-mime-info # for update-mime-database
+        xdg-user-dirs
+      ];
+
+      # Override GSettings schemas
+      environment.sessionVariables.NIX_GSETTINGS_OVERRIDES_DIR = "${nixos-gsettings-overrides}/share/gsettings-schemas/nixos-gsettings-overrides/glib-2.0/schemas";
+
+      environment.pathsToLink = [
+        # FIXME: modules should link subdirs of `/share` rather than relying on this
+        "/share" # TODO: https://github.com/NixOS/nixpkgs/issues/47173
+      ];
+
+      # Shell integration for VTE terminals
+      programs.bash.vteIntegration = mkDefault true;
+      programs.zsh.vteIntegration = mkDefault true;
+
+      # Harmonize Qt5 applications under Pantheon
+      qt5.enable = true;
+      qt5.platformTheme = "gnome";
+      qt5.style = "adwaita";
+
+      # Default Fonts
+      fonts.fonts = with pkgs; [
+        source-code-pro # Default monospace font in 3.32
+        ubuntu_font_family # required for default theme
+      ];
+    })
+
+    (mkIf serviceCfg.apps.enable {
+      programs.geary.enable = mkDefault true;
+      programs.gnome-disks.enable = mkDefault true;
+      programs.gnome-terminal.enable = mkDefault true;
+      programs.evince.enable = mkDefault true;
+      programs.file-roller.enable = mkDefault true;
+
+      environment.systemPackages = (with pkgs // pkgs.gnome3 // pkgs.cinnamon; pkgs.gnome3.removePackagesByName [
+        # cinnamon team apps
+        blueberry
+        warpinator
+
+        # external apps shipped with linux-mint
+        hexchat
+        gnome-calculator
+      ] config.environment.cinnamon.excludePackages);
+    })
+  ];
+}
diff --git a/nixpkgs/nixos/modules/services/x11/desktop-managers/default.nix b/nixpkgs/nixos/modules/services/x11/desktop-managers/default.nix
index 5d3a84d71399..f5559eb53541 100644
--- a/nixpkgs/nixos/modules/services/x11/desktop-managers/default.nix
+++ b/nixpkgs/nixos/modules/services/x11/desktop-managers/default.nix
@@ -21,6 +21,7 @@ in
     ./none.nix ./xterm.nix ./xfce.nix ./plasma5.nix ./lumina.nix
     ./lxqt.nix ./enlightenment.nix ./gnome3.nix ./kodi.nix
     ./mate.nix ./pantheon.nix ./surf-display.nix ./cde.nix
+    ./cinnamon.nix
   ];
 
   options = {
diff --git a/nixpkgs/nixos/modules/services/x11/desktop-managers/pantheon.nix b/nixpkgs/nixos/modules/services/x11/desktop-managers/pantheon.nix
index 6dabca6bf096..e67e216f90d9 100644
--- a/nixpkgs/nixos/modules/services/x11/desktop-managers/pantheon.nix
+++ b/nixpkgs/nixos/modules/services/x11/desktop-managers/pantheon.nix
@@ -240,6 +240,8 @@ in
       # Otherwise you can't store NetworkManager Secrets with
       # "Store the password only for this user"
       programs.nm-applet.enable = true;
+      # Pantheon has its own network indicator
+      programs.nm-applet.indicator = false;
 
       # Shell integration for VTE terminals
       programs.bash.vteIntegration = mkDefault true;
diff --git a/nixpkgs/nixos/modules/services/x11/desktop-managers/plasma5.nix b/nixpkgs/nixos/modules/services/x11/desktop-managers/plasma5.nix
index 6d48b899d231..149f6cbb7628 100644
--- a/nixpkgs/nixos/modules/services/x11/desktop-managers/plasma5.nix
+++ b/nixpkgs/nixos/modules/services/x11/desktop-managers/plasma5.nix
@@ -7,7 +7,9 @@ let
   xcfg = config.services.xserver;
   cfg = xcfg.desktopManager.plasma5;
 
-  inherit (pkgs) kdeApplications plasma5 libsForQt5 qt5;
+  inherit (pkgs) kdeApplications kdeFrameworks plasma5;
+  libsForQt5 = pkgs.libsForQt514;
+  qt5 = pkgs.qt514;
   inherit (pkgs) writeText;
 
   pulseaudio = config.hardware.pulseaudio;
@@ -83,7 +85,7 @@ let
     # recognize that software that has been removed.
     rm -fv $HOME/.cache/ksycoca*
 
-    ${pkgs.libsForQt5.kservice}/bin/kbuildsycoca5
+    ${libsForQt5.kservice}/bin/kbuildsycoca5
   '';
 
   set_XDG_CONFIG_HOME = ''
@@ -203,7 +205,9 @@ in
         KERNEL=="i2c-[0-9]*", TAG+="uaccess"
       '';
 
-      environment.systemPackages = with pkgs; with qt5; with libsForQt5; with plasma5; with kdeApplications;
+      environment.systemPackages =
+        with qt5; with libsForQt5;
+        with plasma5; with kdeApplications; with kdeFrameworks;
         [
           frameworkintegration
           kactivities
@@ -293,7 +297,7 @@ in
 
           qtvirtualkeyboard
 
-          xdg-user-dirs # Update user dirs as described in https://freedesktop.org/wiki/Software/xdg-user-dirs/
+          pkgs.xdg-user-dirs # Update user dirs as described in https://freedesktop.org/wiki/Software/xdg-user-dirs/
         ]
 
         # Phonon audio backend
@@ -301,13 +305,13 @@ in
         ++ lib.optional (cfg.phononBackend == "vlc") libsForQt5.phonon-backend-vlc
 
         # Optional hardware support features
-        ++ lib.optionals config.hardware.bluetooth.enable [ bluedevil bluez-qt openobex obexftp ]
+        ++ lib.optionals config.hardware.bluetooth.enable [ bluedevil bluez-qt pkgs.openobex pkgs.obexftp ]
         ++ lib.optional config.networking.networkmanager.enable plasma-nm
         ++ lib.optional config.hardware.pulseaudio.enable plasma-pa
         ++ lib.optional config.powerManagement.enable powerdevil
-        ++ lib.optional config.services.colord.enable colord-kde
+        ++ lib.optional config.services.colord.enable pkgs.colord-kde
         ++ lib.optionals config.services.samba.enable [ kdenetwork-filesharing pkgs.samba ]
-        ++ lib.optional config.services.xserver.wacom.enable wacomtablet;
+        ++ lib.optional config.services.xserver.wacom.enable pkgs.wacomtablet;
 
       environment.pathsToLink = [
         # FIXME: modules should link subdirs of `/share` rather than relying on this
@@ -321,7 +325,7 @@ in
 
       fonts.fonts = with pkgs; [ noto-fonts hack-font ];
       fonts.fontconfig.defaultFonts = {
-        monospace = [ "Hack" "Noto Mono" ];
+        monospace = [ "Hack" "Noto Sans Mono" ];
         sansSerif = [ "Noto Sans" ];
         serif = [ "Noto Serif" ];
       };
diff --git a/nixpkgs/nixos/modules/services/x11/display-managers/default.nix b/nixpkgs/nixos/modules/services/x11/display-managers/default.nix
index aa6a5ec42be8..08ce8edd6612 100644
--- a/nixpkgs/nixos/modules/services/x11/display-managers/default.nix
+++ b/nixpkgs/nixos/modules/services/x11/display-managers/default.nix
@@ -55,13 +55,6 @@ let
         exec &> >(tee ~/.xsession-errors)
       ''}
 
-      # Tell systemd about our $DISPLAY and $XAUTHORITY.
-      # This is needed by the ssh-agent unit.
-      #
-      # Also tell systemd about the dbus session bus address.
-      # This is required by user units using the session bus.
-      /run/current-system/systemd/bin/systemctl --user import-environment DISPLAY XAUTHORITY DBUS_SESSION_BUS_ADDRESS
-
       # Load X defaults. This should probably be safe on wayland too.
       ${xorg.xrdb}/bin/xrdb -merge ${xresourcesXft}
       if test -e ~/.Xresources; then
@@ -70,6 +63,12 @@ let
           ${xorg.xrdb}/bin/xrdb -merge ~/.Xdefaults
       fi
 
+      # Import environment variables into the systemd user environment.
+      ${optionalString (cfg.displayManager.importedVariables != []) (
+        "/run/current-system/systemd/bin/systemctl --user import-environment "
+          + toString (unique cfg.displayManager.importedVariables)
+      )}
+
       # Speed up application start by 50-150ms according to
       # http://kdemonkey.blogspot.nl/2008/04/magic-trick.html
       rm -rf "$HOME/.compose-cache"
@@ -289,6 +288,14 @@ in
         '';
       };
 
+      importedVariables = mkOption {
+        type = types.listOf (types.strMatching "[a-zA-Z_][a-zA-Z0-9_]*");
+        visible = false;
+        description = ''
+          Environment variables to import into the systemd user environment.
+        '';
+      };
+
       job = {
 
         preStart = mkOption {
@@ -332,12 +339,45 @@ in
 
       };
 
+      # Configuration for automatic login. Common for all DM.
+      autoLogin = mkOption {
+        type = types.submodule {
+          options = {
+            enable = mkOption {
+              type = types.bool;
+              default = cfg.displayManager.autoLogin.user != null;
+              description = ''
+                Automatically log in as <option>autoLogin.user</option>.
+              '';
+            };
+
+            user = mkOption {
+              type = types.nullOr types.str;
+              default = null;
+              description = ''
+                User to be used for the automatic login.
+              '';
+            };
+          };
+        };
+
+        default = {};
+        description = ''
+          Auto login configuration attrset.
+        '';
+      };
+
     };
 
   };
 
   config = {
     assertions = [
+      { assertion = cfg.displayManager.autoLogin.enable -> cfg.displayManager.autoLogin.user != null;
+        message = ''
+          services.xserver.displayManager.autoLogin.enable requires services.xserver.displayManager.autoLogin.user to be set
+        '';
+      }
       {
         assertion = cfg.desktopManager.default != null || cfg.windowManager.default != null -> cfg.displayManager.defaultSession == defaultSessionFromLegacyOptions;
         message = "You cannot use both services.xserver.displayManager.defaultSession option and legacy options (services.xserver.desktopManager.default and services.xserver.windowManager.default).";
@@ -360,6 +400,16 @@ in
 
     services.xserver.displayManager.xserverBin = "${xorg.xorgserver.out}/bin/X";
 
+    services.xserver.displayManager.importedVariables = [
+      # This is required by user units using the session bus.
+      "DBUS_SESSION_BUS_ADDRESS"
+      # These are needed by the ssh-agent unit.
+      "DISPLAY"
+      "XAUTHORITY"
+      # This is required to specify session within user units (e.g. loginctl lock-session).
+      "XDG_SESSION_ID"
+    ];
+
     systemd.user.targets.graphical-session = {
       unitConfig = {
         RefuseManualStart = false;
diff --git a/nixpkgs/nixos/modules/services/x11/display-managers/gdm.nix b/nixpkgs/nixos/modules/services/x11/display-managers/gdm.nix
index 622ea62f3a91..eae70a57c781 100644
--- a/nixpkgs/nixos/modules/services/x11/display-managers/gdm.nix
+++ b/nixpkgs/nixos/modules/services/x11/display-managers/gdm.nix
@@ -37,6 +37,22 @@ let
 in
 
 {
+  imports = [
+    (mkRenamedOptionModule [ "services" "xserver" "displayManager" "gdm" "autoLogin" "enable" ] [
+      "services"
+      "xserver"
+      "displayManager"
+      "autoLogin"
+      "enable"
+    ])
+    (mkRenamedOptionModule [ "services" "xserver" "displayManager" "gdm" "autoLogin" "user" ] [
+      "services"
+      "xserver"
+      "displayManager"
+      "autoLogin"
+      "user"
+    ])
+  ];
 
   meta = {
     maintainers = teams.gnome.members;
@@ -48,48 +64,17 @@ in
 
     services.xserver.displayManager.gdm = {
 
-      enable = mkEnableOption ''
-        GDM, the GNOME Display Manager
-      '';
+      enable = mkEnableOption "GDM, the GNOME Display Manager";
 
-      debug = mkEnableOption ''
-        debugging messages in GDM
-      '';
+      debug = mkEnableOption "debugging messages in GDM";
 
-      autoLogin = mkOption {
-        default = {};
+      # Auto login options specific to GDM
+      autoLogin.delay = mkOption {
+        type = types.int;
+        default = 0;
         description = ''
-          Auto login configuration attrset.
+          Seconds of inactivity after which the autologin will be performed.
         '';
-
-        type = types.submodule {
-          options = {
-            enable = mkOption {
-              type = types.bool;
-              default = false;
-              description = ''
-                Automatically log in as the sepecified <option>autoLogin.user</option>.
-              '';
-            };
-
-            user = mkOption {
-              type = types.nullOr types.str;
-              default = null;
-              description = ''
-                User to be used for the autologin.
-              '';
-            };
-
-            delay = mkOption {
-              type = types.int;
-              default = 0;
-              description = ''
-                Seconds of inactivity after which the autologin will be performed.
-              '';
-            };
-
-          };
-        };
       };
 
       wayland = mkOption {
@@ -128,12 +113,6 @@ in
 
   config = mkIf cfg.gdm.enable {
 
-    assertions = [
-      { assertion = cfg.gdm.autoLogin.enable -> cfg.gdm.autoLogin.user != null;
-        message = "GDM auto-login requires services.xserver.displayManager.gdm.autoLogin.user to be set";
-      }
-    ];
-
     services.xserver.displayManager.lightdm.enable = false;
 
     users.users.gdm =
@@ -217,7 +196,6 @@ in
       KillMode = "mixed";
       IgnoreSIGPIPE = "no";
       BusName = "org.gnome.DisplayManager";
-      StandardOutput = "syslog";
       StandardError = "inherit";
       ExecReload = "${pkgs.coreutils}/bin/kill -SIGHUP $MAINPID";
       KeyringMode = "shared";
@@ -287,14 +265,14 @@ in
     environment.etc."gdm/custom.conf".text = ''
       [daemon]
       WaylandEnable=${if cfg.gdm.wayland then "true" else "false"}
-      ${optionalString cfg.gdm.autoLogin.enable (
+      ${optionalString cfg.autoLogin.enable (
         if cfg.gdm.autoLogin.delay > 0 then ''
           TimedLoginEnable=true
-          TimedLogin=${cfg.gdm.autoLogin.user}
+          TimedLogin=${cfg.autoLogin.user}
           TimedLoginDelay=${toString cfg.gdm.autoLogin.delay}
         '' else ''
           AutomaticLoginEnable=true
-          AutomaticLogin=${cfg.gdm.autoLogin.user}
+          AutomaticLogin=${cfg.autoLogin.user}
         '')
       }
 
diff --git a/nixpkgs/nixos/modules/services/x11/display-managers/lightdm-greeters/pantheon.nix b/nixpkgs/nixos/modules/services/x11/display-managers/lightdm-greeters/pantheon.nix
index 087c6b9c38ac..9bc9e2bf6162 100644
--- a/nixpkgs/nixos/modules/services/x11/display-managers/lightdm-greeters/pantheon.nix
+++ b/nixpkgs/nixos/modules/services/x11/display-managers/lightdm-greeters/pantheon.nix
@@ -43,7 +43,7 @@ in
     services.xserver.displayManager.lightdm.extraSeatDefaults = "greeter-show-manual-login=true";
 
     environment.etc."lightdm/io.elementary.greeter.conf".source = "${pkgs.pantheon.elementary-greeter}/etc/lightdm/io.elementary.greeter.conf";
-    environment.etc."wingpanel.d/io.elementary.greeter.whitelist".source = "${pkgs.pantheon.elementary-default-settings}/etc/wingpanel.d/io.elementary.greeter.whitelist";
+    environment.etc."wingpanel.d/io.elementary.greeter.allowed".source = "${pkgs.pantheon.elementary-default-settings}/etc/wingpanel.d/io.elementary.greeter.allowed";
 
   };
 }
diff --git a/nixpkgs/nixos/modules/services/x11/display-managers/lightdm.nix b/nixpkgs/nixos/modules/services/x11/display-managers/lightdm.nix
index 678cade44427..143785db0b4f 100644
--- a/nixpkgs/nixos/modules/services/x11/display-managers/lightdm.nix
+++ b/nixpkgs/nixos/modules/services/x11/display-managers/lightdm.nix
@@ -53,8 +53,8 @@ let
       ${optionalString cfg.greeter.enable ''
         greeter-session = ${cfg.greeter.name}
       ''}
-      ${optionalString cfg.autoLogin.enable ''
-        autologin-user = ${cfg.autoLogin.user}
+      ${optionalString dmcfg.autoLogin.enable ''
+        autologin-user = ${dmcfg.autoLogin.user}
         autologin-user-timeout = ${toString cfg.autoLogin.timeout}
         autologin-session = ${sessionData.autologinSession}
       ''}
@@ -82,6 +82,20 @@ in
     ./lightdm-greeters/enso-os.nix
     ./lightdm-greeters/pantheon.nix
     ./lightdm-greeters/tiny.nix
+    (mkRenamedOptionModule [ "services" "xserver" "displayManager" "lightdm" "autoLogin" "enable" ] [
+      "services"
+      "xserver"
+      "displayManager"
+      "autoLogin"
+      "enable"
+    ])
+    (mkRenamedOptionModule [ "services" "xserver" "displayManager" "lightdm" "autoLogin" "user" ] [
+     "services"
+     "xserver"
+     "displayManager"
+     "autoLogin"
+     "user"
+    ])
   ];
 
   options = {
@@ -149,39 +163,13 @@ in
         description = "Extra lines to append to SeatDefaults section.";
       };
 
-      autoLogin = mkOption {
-        default = {};
+      # Configuration for automatic login specific to LightDM
+      autoLogin.timeout = mkOption {
+        type = types.int;
+        default = 0;
         description = ''
-          Configuration for automatic login.
+          Show the greeter for this many seconds before automatic login occurs.
         '';
-
-        type = types.submodule {
-          options = {
-            enable = mkOption {
-              type = types.bool;
-              default = false;
-              description = ''
-                Automatically log in as the specified <option>autoLogin.user</option>.
-              '';
-            };
-
-            user = mkOption {
-              type = types.nullOr types.str;
-              default = null;
-              description = ''
-                User to be used for the automatic login.
-              '';
-            };
-
-            timeout = mkOption {
-              type = types.int;
-              default = 0;
-              description = ''
-                Show the greeter for this many seconds before automatic login occurs.
-              '';
-            };
-          };
-        };
       };
 
     };
@@ -195,17 +183,12 @@ in
           LightDM requires services.xserver.enable to be true
         '';
       }
-      { assertion = cfg.autoLogin.enable -> cfg.autoLogin.user != null;
-        message = ''
-          LightDM auto-login requires services.xserver.displayManager.lightdm.autoLogin.user to be set
-        '';
-      }
-      { assertion = cfg.autoLogin.enable -> sessionData.autologinSession != null;
+      { assertion = dmcfg.autoLogin.enable -> sessionData.autologinSession != null;
         message = ''
           LightDM auto-login requires that services.xserver.displayManager.defaultSession is set.
         '';
       }
-      { assertion = !cfg.greeter.enable -> (cfg.autoLogin.enable && cfg.autoLogin.timeout == 0);
+      { assertion = !cfg.greeter.enable -> (dmcfg.autoLogin.enable && cfg.autoLogin.timeout == 0);
         message = ''
           LightDM can only run without greeter if automatic login is enabled and the timeout for it
           is set to zero.
@@ -218,7 +201,7 @@ in
 
     # Set default session in session chooser to a specified values – basically ignore session history.
     # Auto-login is already covered by a config value.
-    services.xserver.displayManager.job.preStart = optionalString (!cfg.autoLogin.enable && dmcfg.defaultSession != null) ''
+    services.xserver.displayManager.job.preStart = optionalString (!dmcfg.autoLogin.enable && dmcfg.defaultSession != null) ''
       ${setSessionScript}/bin/set-session ${dmcfg.defaultSession}
     '';
 
@@ -270,7 +253,6 @@ in
       KeyringMode = "shared";
       KillMode = "mixed";
       StandardError = "inherit";
-      StandardOutput = "syslog";
     };
 
     environment.etc."lightdm/lightdm.conf".source = lightdmConf;
diff --git a/nixpkgs/nixos/modules/services/x11/display-managers/sddm.nix b/nixpkgs/nixos/modules/services/x11/display-managers/sddm.nix
index 2f42271da872..e63bb2e44539 100644
--- a/nixpkgs/nixos/modules/services/x11/display-managers/sddm.nix
+++ b/nixpkgs/nixos/modules/services/x11/display-managers/sddm.nix
@@ -61,9 +61,9 @@ let
     EnableHidpi=${if cfg.enableHidpi then "true" else "false"}
     SessionDir=${dmcfg.sessionData.desktops}/share/wayland-sessions
 
-    ${optionalString cfg.autoLogin.enable ''
+    ${optionalString dmcfg.autoLogin.enable ''
     [Autologin]
-    User=${cfg.autoLogin.user}
+    User=${dmcfg.autoLogin.user}
     Session=${autoLoginSessionName}.desktop
     Relogin=${boolToString cfg.autoLogin.relogin}
     ''}
@@ -78,6 +78,20 @@ in
   imports = [
     (mkRemovedOptionModule [ "services" "xserver" "displayManager" "sddm" "themes" ]
       "Set the option `services.xserver.displayManager.sddm.package' instead.")
+    (mkRenamedOptionModule [ "services" "xserver" "displayManager" "sddm" "autoLogin" "enable" ] [
+      "services"
+      "xserver"
+      "displayManager"
+      "autoLogin"
+      "enable"
+    ])
+    (mkRenamedOptionModule [ "services" "xserver" "displayManager" "sddm" "autoLogin" "user" ] [
+      "services"
+      "xserver"
+      "displayManager"
+      "autoLogin"
+      "user"
+    ])
   ];
 
   options = {
@@ -153,40 +167,14 @@ in
         '';
       };
 
-      autoLogin = mkOption {
-        default = {};
+      # Configuration for automatic login specific to SDDM
+      autoLogin.relogin = mkOption {
+        type = types.bool;
+        default = false;
         description = ''
-          Configuration for automatic login.
+          If true automatic login will kick in again on session exit (logout), otherwise it
+          will only log in automatically when the display-manager is started.
         '';
-
-        type = types.submodule {
-          options = {
-            enable = mkOption {
-              type = types.bool;
-              default = false;
-              description = ''
-                Automatically log in as <option>autoLogin.user</option>.
-              '';
-            };
-
-            user = mkOption {
-              type = types.nullOr types.str;
-              default = null;
-              description = ''
-                User to be used for the automatic login.
-              '';
-            };
-
-            relogin = mkOption {
-              type = types.bool;
-              default = false;
-              description = ''
-                If true automatic login will kick in again on session exit (logout), otherwise it
-                will only log in automatically when the display-manager is started.
-              '';
-            };
-          };
-        };
       };
 
     };
@@ -201,12 +189,7 @@ in
           SDDM requires services.xserver.enable to be true
         '';
       }
-      { assertion = cfg.autoLogin.enable -> cfg.autoLogin.user != null;
-        message = ''
-          SDDM auto-login requires services.xserver.displayManager.sddm.autoLogin.user to be set
-        '';
-      }
-      { assertion = cfg.autoLogin.enable -> autoLoginSessionName != null;
+      { assertion = dmcfg.autoLogin.enable -> autoLoginSessionName != null;
         message = ''
           SDDM auto-login requires that services.xserver.displayManager.defaultSession is set.
         '';
diff --git a/nixpkgs/nixos/modules/services/x11/imwheel.nix b/nixpkgs/nixos/modules/services/x11/imwheel.nix
index 3923df498e79..51f72dadbd43 100644
--- a/nixpkgs/nixos/modules/services/x11/imwheel.nix
+++ b/nixpkgs/nixos/modules/services/x11/imwheel.nix
@@ -61,7 +61,8 @@ in
             "--kill"
           ] ++ cfg.extraOptions);
           ExecStop = "${pkgs.procps}/bin/pkill imwheel";
-          Restart = "on-failure";
+          RestartSec = 3;
+          Restart = "always";
         };
       };
     };
diff --git a/nixpkgs/nixos/modules/services/x11/picom.nix b/nixpkgs/nixos/modules/services/x11/picom.nix
index 1289edd2904a..977d0fea2192 100644
--- a/nixpkgs/nixos/modules/services/x11/picom.nix
+++ b/nixpkgs/nixos/modules/services/x11/picom.nix
@@ -57,7 +57,15 @@ in {
       type = types.bool;
       default = false;
       description = ''
-        Whether of not to enable Picom as the X.org composite manager.
+        Whether or not to enable Picom as the X.org composite manager.
+      '';
+    };
+
+    experimentalBackends = mkOption {
+      type = types.bool;
+      default = false;
+      description = ''
+        Whether to use the unstable new reimplementation of the backends.
       '';
     };
 
@@ -302,7 +310,8 @@ in {
       };
 
       serviceConfig = {
-        ExecStart = "${pkgs.picom}/bin/picom --config ${configFile}";
+        ExecStart = "${pkgs.picom}/bin/picom --config ${configFile}"
+          + (optionalString cfg.experimentalBackends " --experimental-backends");
         RestartSec = 3;
         Restart = "always";
       };
diff --git a/nixpkgs/nixos/modules/services/x11/urserver.nix b/nixpkgs/nixos/modules/services/x11/urserver.nix
new file mode 100644
index 000000000000..0beb62eb766a
--- /dev/null
+++ b/nixpkgs/nixos/modules/services/x11/urserver.nix
@@ -0,0 +1,38 @@
+# urserver service
+{ config, lib, pkgs, ... }:
+
+let
+  cfg = config.services.urserver;
+in {
+
+  options.services.urserver.enable = lib.mkEnableOption "urserver";
+
+  config = lib.mkIf cfg.enable {
+
+    networking.firewall = {
+      allowedTCPPorts = [ 9510 9512 ];
+      allowedUDPPorts = [ 9511 9512 ];
+    };
+
+    systemd.user.services.urserver =  {
+      description = ''
+        Server for Unified Remote: The one-and-only remote for your computer.
+      '';
+      wantedBy = [ "graphical-session.target" ];
+      partOf = [ "graphical-session.target" ];
+      after = [ "network.target" ];
+      serviceConfig = {
+        Type = "forking";
+        ExecStart = ''
+          ${pkgs.urserver}/bin/urserver --daemon
+        '';
+        ExecStop = ''
+          ${pkgs.procps}/bin/pkill urserver
+        '';
+        RestartSec = 3;
+        Restart = "on-failure";
+      };
+    };
+  };
+
+}
diff --git a/nixpkgs/nixos/modules/services/x11/window-managers/qtile.nix b/nixpkgs/nixos/modules/services/x11/window-managers/qtile.nix
index ad3b65150b01..cadc316bbc4f 100644
--- a/nixpkgs/nixos/modules/services/x11/window-managers/qtile.nix
+++ b/nixpkgs/nixos/modules/services/x11/window-managers/qtile.nix
@@ -19,7 +19,7 @@ in
         waitPID=$!
       '';
     }];
-    
+
     environment.systemPackages = [ pkgs.qtile ];
   };
 }
diff --git a/nixpkgs/nixos/modules/services/x11/window-managers/xmonad.nix b/nixpkgs/nixos/modules/services/x11/window-managers/xmonad.nix
index 30c59b88f82f..dba25da8260c 100644
--- a/nixpkgs/nixos/modules/services/x11/window-managers/xmonad.nix
+++ b/nixpkgs/nixos/modules/services/x11/window-managers/xmonad.nix
@@ -16,6 +16,7 @@ let
                 cfg.extraPackages cfg.haskellPackages ++
                 optionals cfg.enableContribAndExtras
                 (with cfg.haskellPackages; [ xmonad-contrib xmonad-extras ]);
+    inherit (cfg) ghcArgs;
   } cfg.config;
 
 in
@@ -76,18 +77,35 @@ in
                  }
         '';
       };
+
+      xmonadCliArgs = mkOption {
+        default = [];
+        type = with lib.types; listOf str;
+        description = ''
+          Command line arguments passed to the xmonad binary.
+        '';
+      };
+
+      ghcArgs = mkOption {
+        default = [];
+        type = with lib.types; listOf str;
+        description = ''
+          Command line arguments passed to the compiler (ghc)
+          invocation when xmonad.config is set.
+        '';
+      };
+
     };
   };
   config = mkIf cfg.enable {
     services.xserver.windowManager = {
       session = [{
         name = "xmonad";
-        start = if (cfg.config != null) then ''
-          ${xmonadBin}
-          waitPID=$!
-        '' else ''
-          systemd-cat -t xmonad ${xmonad}/bin/xmonad &
-          waitPID=$!
+        start = let
+          xmonadCommand = if (cfg.config != null) then xmonadBin else "${xmonad}/bin/xmonad";
+        in ''
+           systemd-cat -t xmonad -- ${xmonadCommand} ${lib.escapeShellArgs cfg.xmonadCliArgs} &
+           waitPID=$!
         '';
       }];
     };
diff --git a/nixpkgs/nixos/modules/services/x11/xserver.nix b/nixpkgs/nixos/modules/services/x11/xserver.nix
index 400173745d3f..0552095ba955 100644
--- a/nixpkgs/nixos/modules/services/x11/xserver.nix
+++ b/nixpkgs/nixos/modules/services/x11/xserver.nix
@@ -113,14 +113,14 @@ let
   in concatMapStrings (getAttr "value") monitors;
 
   configFile = pkgs.runCommand "xserver.conf"
-    { xfs = optionalString (cfg.useXFS != false)
-        ''FontPath "${toString cfg.useXFS}"'';
+    { fontpath = optionalString (cfg.fontPath != null)
+        ''FontPath "${cfg.fontPath}"'';
       inherit (cfg) config;
       preferLocalBuild = true;
     }
       ''
         echo 'Section "Files"' >> $out
-        echo $xfs >> $out
+        echo $fontpath >> $out
 
         for i in ${toString fontsForXServer}; do
           if test "''${i:0:''${#NIX_STORE}}" == "$NIX_STORE"; then
@@ -151,6 +151,8 @@ in
       ./desktop-managers/default.nix
       (mkRemovedOptionModule [ "services" "xserver" "startGnuPGAgent" ]
         "See the 16.09 release notes for more information.")
+      (mkRemovedOptionModule ["services" "xserver" "useXFS" ]
+        "Use services.xserver.fontPath instead of useXFS")
     ];
 
 
@@ -481,11 +483,15 @@ in
         description = "Default colour depth.";
       };
 
-      useXFS = mkOption {
-        # FIXME: what's the type of this option?
-        default = false;
+      fontPath = mkOption {
+        type = types.nullOr types.str;
+        default = null;
         example = "unix/:7100";
-        description = "Determines how to connect to the X Font Server.";
+        description = ''
+          Set the X server FontPath. Defaults to null, which
+          means the compiled in defaults will be used. See
+          man xorg.conf for details.
+        '';
       };
 
       tty = mkOption {
diff --git a/nixpkgs/nixos/modules/system/activation/top-level.nix b/nixpkgs/nixos/modules/system/activation/top-level.nix
index f6739977fa4f..2724d9f9cb6f 100644
--- a/nixpkgs/nixos/modules/system/activation/top-level.nix
+++ b/nixpkgs/nixos/modules/system/activation/top-level.nix
@@ -92,9 +92,7 @@ let
   # `switch-to-configuration' that activates the configuration and
   # makes it bootable.
   baseSystem = pkgs.stdenvNoCC.mkDerivation {
-    name = let hn = config.networking.hostName;
-               nn = if (hn != "") then hn else "unnamed";
-        in "nixos-system-${nn}-${config.system.nixos.label}";
+    name = "nixos-system-${config.system.name}-${config.system.nixos.label}";
     preferLocalBuild = true;
     allowSubstitutes = false;
     buildCommand = systemBuilder;
@@ -161,9 +159,9 @@ in
         To switch to a specialised configuration
         (e.g. <literal>fewJobsManyCores</literal>) at runtime, run:
 
-        <programlisting>
-        # sudo /run/current-system/specialisation/fewJobsManyCores/bin/switch-to-configuration test
-        </programlisting>
+        <screen>
+        <prompt># </prompt>sudo /run/current-system/specialisation/fewJobsManyCores/bin/switch-to-configuration test
+        </screen>
       '';
       type = types.attrsOf (types.submodule (
         { ... }: {
@@ -265,6 +263,21 @@ in
       '';
     };
 
+    system.name = mkOption {
+      type = types.str;
+      default =
+        if config.networking.hostName == ""
+        then "unnamed"
+        else config.networking.hostName;
+      defaultText = '''networking.hostName' if non empty else "unnamed"'';
+      description = ''
+        The name of the system used in the <option>system.build.toplevel</option> derivation.
+        </para><para>
+        That derivation has the following name:
+        <literal>"nixos-system-''${config.system.name}-''${config.system.nixos.label}"</literal>
+      '';
+    };
+
   };
 
 
diff --git a/nixpkgs/nixos/modules/system/boot/emergency-mode.nix b/nixpkgs/nixos/modules/system/boot/emergency-mode.nix
index 9cdab8416192..ec697bcee268 100644
--- a/nixpkgs/nixos/modules/system/boot/emergency-mode.nix
+++ b/nixpkgs/nixos/modules/system/boot/emergency-mode.nix
@@ -34,4 +34,4 @@ with lib;
 
   };
 
-}
\ No newline at end of file
+}
diff --git a/nixpkgs/nixos/modules/system/boot/initrd-network.nix b/nixpkgs/nixos/modules/system/boot/initrd-network.nix
index 0ab6e626b340..ec794d6eb014 100644
--- a/nixpkgs/nixos/modules/system/boot/initrd-network.nix
+++ b/nixpkgs/nixos/modules/system/boot/initrd-network.nix
@@ -139,7 +139,7 @@ in
     boot.initrd.postMountCommands = mkIf cfg.flushBeforeStage2 ''
       for iface in $ifaces; do
         ip address flush "$iface"
-        ip link down "$iface"
+        ip link set "$iface" down
       done
     '';
 
diff --git a/nixpkgs/nixos/modules/system/boot/initrd-openvpn.nix b/nixpkgs/nixos/modules/system/boot/initrd-openvpn.nix
new file mode 100644
index 000000000000..e59bc7b6678f
--- /dev/null
+++ b/nixpkgs/nixos/modules/system/boot/initrd-openvpn.nix
@@ -0,0 +1,81 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+
+  cfg = config.boot.initrd.network.openvpn;
+
+in
+
+{
+
+  options = {
+
+    boot.initrd.network.openvpn.enable = mkOption {
+      type = types.bool;
+      default = false;
+      description = ''
+        Starts an OpenVPN client during initrd boot. It can be used to e.g.
+        remotely accessing the SSH service controlled by
+        <option>boot.initrd.network.ssh</option> or other network services
+        included. Service is killed when stage-1 boot is finished.
+      '';
+    };
+
+    boot.initrd.network.openvpn.configuration = mkOption {
+      type = types.path; # Same type as boot.initrd.secrets
+      description = ''
+        The configuration file for OpenVPN.
+
+        <warning>
+          <para>
+            Unless your bootloader supports initrd secrets, this configuration
+            is stored insecurely in the global Nix store.
+          </para>
+        </warning>
+      '';
+      example = "./configuration.ovpn";
+    };
+
+  };
+
+  config = mkIf (config.boot.initrd.network.enable && cfg.enable) {
+    assertions = [
+      {
+        assertion = cfg.configuration != null;
+        message = "You should specify a configuration for initrd OpenVPN";
+      }
+    ];
+
+    # Add kernel modules needed for OpenVPN
+    boot.initrd.kernelModules = [ "tun" "tap" ];
+
+    # Add openvpn and ip binaries to the initrd
+    # The shared libraries are required for DNS resolution
+    boot.initrd.extraUtilsCommands = ''
+      copy_bin_and_libs ${pkgs.openvpn}/bin/openvpn
+      copy_bin_and_libs ${pkgs.iproute}/bin/ip
+
+      cp -pv ${pkgs.glibc}/lib/libresolv.so.2 $out/lib
+      cp -pv ${pkgs.glibc}/lib/libnss_dns.so.2 $out/lib
+    '';
+
+    boot.initrd.secrets = {
+      "/etc/initrd.ovpn" = cfg.configuration;
+    };
+
+    # openvpn --version would exit with 1 instead of 0
+    boot.initrd.extraUtilsCommandsTest = ''
+      $out/bin/openvpn --show-gateway
+    '';
+
+    # Add `iproute /bin/ip` to the config, to ensure that openvpn
+    # is able to set the routes
+    boot.initrd.network.postCommands = ''
+      (cat /etc/initrd.ovpn; echo -e '\niproute /bin/ip') | \
+        openvpn /dev/stdin &
+    '';
+  };
+
+}
diff --git a/nixpkgs/nixos/modules/system/boot/kernel_config.nix b/nixpkgs/nixos/modules/system/boot/kernel_config.nix
index 85bd420e3044..783685c9dfe4 100644
--- a/nixpkgs/nixos/modules/system/boot/kernel_config.nix
+++ b/nixpkgs/nixos/modules/system/boot/kernel_config.nix
@@ -54,7 +54,7 @@ let
         type = types.bool // { merge = mergeFalseByDefault; };
         default = false;
         description = ''
-          Wether option should generate a failure when unused.
+          Whether option should generate a failure when unused.
           Upon merging values, mandatory wins over optional.
         '';
       };
diff --git a/nixpkgs/nixos/modules/system/boot/loader/generations-dir/generations-dir-builder.sh b/nixpkgs/nixos/modules/system/boot/loader/generations-dir/generations-dir-builder.sh
index e723b9eb7cb3..8ae23dc988c2 100644
--- a/nixpkgs/nixos/modules/system/boot/loader/generations-dir/generations-dir-builder.sh
+++ b/nixpkgs/nixos/modules/system/boot/loader/generations-dir/generations-dir-builder.sh
@@ -63,7 +63,7 @@ addEntry() {
         copyToKernelsDir $kernel; kernel=$result
         copyToKernelsDir $initrd; initrd=$result
     fi
-    
+
     mkdir -p $outdir
     ln -sf $(readlink -f $path) $outdir/system
     ln -sf $(readlink -f $path/init) $outdir/init
diff --git a/nixpkgs/nixos/modules/system/boot/loader/generic-extlinux-compatible/default.nix b/nixpkgs/nixos/modules/system/boot/loader/generic-extlinux-compatible/default.nix
index af39c7bb6841..bd508bbe8eaa 100644
--- a/nixpkgs/nixos/modules/system/boot/loader/generic-extlinux-compatible/default.nix
+++ b/nixpkgs/nixos/modules/system/boot/loader/generic-extlinux-compatible/default.nix
@@ -4,11 +4,15 @@ with lib;
 
 let
   blCfg = config.boot.loader;
+  dtCfg = config.hardware.deviceTree;
   cfg = blCfg.generic-extlinux-compatible;
 
   timeoutStr = if blCfg.timeout == null then "-1" else toString blCfg.timeout;
 
+  # The builder used to write during system activation
   builder = import ./extlinux-conf-builder.nix { inherit pkgs; };
+  # The builder exposed in populateCmd, which runs on the build architecture
+  populateBuilder = import ./extlinux-conf-builder.nix { pkgs = pkgs.buildPackages; };
 in
 {
   options = {
@@ -34,11 +38,28 @@ in
           Maximum number of configurations in the boot menu.
         '';
       };
+
+      populateCmd = mkOption {
+        type = types.str;
+        readOnly = true;
+        description = ''
+          Contains the builder command used to populate an image,
+          honoring all options except the <literal>-c &lt;path-to-default-configuration&gt;</literal>
+          argument.
+          Useful to have for sdImage.populateRootCommands
+        '';
+      };
+
     };
   };
 
-  config = mkIf cfg.enable {
-    system.build.installBootLoader = "${builder} -g ${toString cfg.configurationLimit} -t ${timeoutStr} -c";
-    system.boot.loader.id = "generic-extlinux-compatible";
-  };
+  config = let
+    builderArgs = "-g ${toString cfg.configurationLimit} -t ${timeoutStr}" + lib.optionalString (dtCfg.name != null) " -n ${dtCfg.name}";
+  in
+    mkIf cfg.enable {
+      system.build.installBootLoader = "${builder} ${builderArgs} -c";
+      system.boot.loader.id = "generic-extlinux-compatible";
+
+      boot.loader.generic-extlinux-compatible.populateCmd = "${populateBuilder} ${builderArgs}";
+    };
 }
diff --git a/nixpkgs/nixos/modules/system/boot/loader/generic-extlinux-compatible/extlinux-conf-builder.sh b/nixpkgs/nixos/modules/system/boot/loader/generic-extlinux-compatible/extlinux-conf-builder.sh
index 0092ee92b62f..854684b87fac 100644
--- a/nixpkgs/nixos/modules/system/boot/loader/generic-extlinux-compatible/extlinux-conf-builder.sh
+++ b/nixpkgs/nixos/modules/system/boot/loader/generic-extlinux-compatible/extlinux-conf-builder.sh
@@ -6,7 +6,7 @@ export PATH=/empty
 for i in @path@; do PATH=$PATH:$i/bin; done
 
 usage() {
-    echo "usage: $0 -t <timeout> -c <path-to-default-configuration> [-d <boot-dir>] [-g <num-generations>]" >&2
+    echo "usage: $0 -t <timeout> -c <path-to-default-configuration> [-d <boot-dir>] [-g <num-generations>] [-n <dtbName>]" >&2
     exit 1
 }
 
@@ -15,7 +15,7 @@ default=                # Default configuration
 target=/boot            # Target directory
 numGenerations=0        # Number of other generations to include in the menu
 
-while getopts "t:c:d:g:" opt; do
+while getopts "t:c:d:g:n:" opt; do
     case "$opt" in
         t) # U-Boot interprets '0' as infinite and negative as instant boot
             if [ "$OPTARG" -lt 0 ]; then
@@ -29,6 +29,7 @@ while getopts "t:c:d:g:" opt; do
         c) default="$OPTARG" ;;
         d) target="$OPTARG" ;;
         g) numGenerations="$OPTARG" ;;
+        n) dtbName="$OPTARG" ;;
         \?) usage ;;
     esac
 done
@@ -96,7 +97,17 @@ addEntry() {
     echo "  LINUX ../nixos/$(basename $kernel)"
     echo "  INITRD ../nixos/$(basename $initrd)"
     if [ -d "$dtbDir" ]; then
-        echo "  FDTDIR ../nixos/$(basename $dtbs)"
+        # if a dtbName was specified explicitly, use that, else use FDTDIR
+        if [ -n "$dtbName" ]; then
+            echo "  FDT ../nixos/$(basename $dtbs)/${dtbName}"
+        else
+            echo "  FDTDIR ../nixos/$(basename $dtbs)"
+        fi
+    else
+        if [ -n "$dtbName" ]; then
+            echo "Explicitly requested dtbName $dtbName, but there's no FDTDIR - bailing out." >&2
+            exit 1
+        fi
     fi
     echo "  APPEND systemConfig=$path init=$path/init $extraParams"
 }
diff --git a/nixpkgs/nixos/modules/system/boot/loader/grub/grub.nix b/nixpkgs/nixos/modules/system/boot/loader/grub/grub.nix
index 3975372e15ec..20e39628eabb 100644
--- a/nixpkgs/nixos/modules/system/boot/loader/grub/grub.nix
+++ b/nixpkgs/nixos/modules/system/boot/loader/grub/grub.nix
@@ -55,11 +55,14 @@ let
       storePath = config.boot.loader.grub.storePath;
       bootloaderId = if args.efiBootloaderId == null then "NixOS${efiSysMountPoint'}" else args.efiBootloaderId;
       timeout = if config.boot.loader.timeout == null then -1 else config.boot.loader.timeout;
+      users = if cfg.users == {} || cfg.version != 1 then cfg.users else throw "GRUB version 1 does not support user accounts.";
+      theme = f cfg.theme;
       inherit efiSysMountPoint;
       inherit (args) devices;
       inherit (efi) canTouchEfiVariables;
       inherit (cfg)
         version extraConfig extraPerEntryConfig extraEntries forceInstall useOSProber
+        extraGrubInstallArgs
         extraEntriesBeforeNixOS extraPrepareConfig configurationLimit copyKernels
         default fsIdentifier efiSupport efiInstallAsRemovable gfxmodeEfi gfxmodeBios gfxpayloadEfi gfxpayloadBios;
       path = with pkgs; makeBinPath (
@@ -137,6 +140,67 @@ in
         '';
       };
 
+      users = mkOption {
+        default = {};
+        example = {
+          root = { hashedPasswordFile = "/path/to/file"; };
+        };
+        description = ''
+          User accounts for GRUB. When specified, the GRUB command line and
+          all boot options except the default are password-protected.
+          All passwords and hashes provided will be stored in /boot/grub/grub.cfg,
+          and will be visible to any local user who can read this file. Additionally,
+          any passwords and hashes provided directly in a Nix configuration
+          (as opposed to external files) will be copied into the Nix store, and
+          will be visible to all local users.
+        '';
+        type = with types; attrsOf (submodule {
+          options = {
+            hashedPasswordFile = mkOption {
+              example = "/path/to/file";
+              default = null;
+              type = with types; uniq (nullOr str);
+              description = ''
+                Specifies the path to a file containing the password hash
+                for the account, generated with grub-mkpasswd-pbkdf2.
+                This hash will be stored in /boot/grub/grub.cfg, and will
+                be visible to any local user who can read this file.
+              '';
+            };
+            hashedPassword = mkOption {
+              example = "grub.pbkdf2.sha512.10000.674DFFDEF76E13EA...2CC972B102CF4355";
+              default = null;
+              type = with types; uniq (nullOr str);
+              description = ''
+                Specifies the password hash for the account,
+                generated with grub-mkpasswd-pbkdf2.
+                This hash will be copied to the Nix store, and will be visible to all local users.
+              '';
+            };
+            passwordFile = mkOption {
+              example = "/path/to/file";
+              default = null;
+              type = with types; uniq (nullOr str);
+              description = ''
+                Specifies the path to a file containing the
+                clear text password for the account.
+                This password will be stored in /boot/grub/grub.cfg, and will
+                be visible to any local user who can read this file.
+              '';
+            };
+            password = mkOption {
+              example = "Pa$$w0rd!";
+              default = null;
+              type = with types; uniq (nullOr str);
+              description = ''
+                Specifies the clear text password for the account.
+                This password will be copied to the Nix store, and will be visible to all local users.
+              '';
+            };
+          };
+        });
+      };
+
       mirroredBoots = mkOption {
         default = [ ];
         example = [
@@ -236,6 +300,33 @@ in
         '';
       };
 
+      extraGrubInstallArgs = mkOption {
+        default = [ ];
+        example = [ "--modules=nativedisk ahci pata part_gpt part_msdos diskfilter mdraid1x lvm ext2" ];
+        type = types.listOf types.str;
+        description = ''
+          Additional arguments passed to <literal>grub-install</literal>.
+
+          A use case for this is to build specific GRUB2 modules
+          directly into the GRUB2 kernel image, so that they are available
+          and activated even in the <literal>grub rescue</literal> shell.
+
+          They are also necessary when the BIOS/UEFI is bugged and cannot
+          correctly read large disks (e.g. above 2 TB), so GRUB2's own
+          <literal>nativedisk</literal> and related modules can be used
+          to use its own disk drivers. The example shows one such case.
+          This is also useful for booting from USB.
+          See the
+          <link xlink:href="http://git.savannah.gnu.org/cgit/grub.git/tree/grub-core/commands/nativedisk.c?h=grub-2.04#n326">
+          GRUB source code
+          </link>
+          for which disk modules are available.
+
+          The list elements are passed directly as <literal>argv</literal>
+          arguments to the <literal>grub-install</literal> program, in order.
+        '';
+      };
+
       extraPerEntryConfig = mkOption {
         default = "";
         example = "root (hd0)";
@@ -336,6 +427,19 @@ in
         '';
       };
 
+      theme = mkOption {
+        type = types.nullOr types.path;
+        example = literalExample "pkgs.nixos-grub2-theme";
+        default = null;
+        description = ''
+          Grub theme to be used.
+
+          <note><para>
+          This options has no effect for GRUB 1.
+          </para></note>
+        '';
+      };
+
       splashMode = mkOption {
         type = types.enum [ "normal" "stretch" ];
         default = "stretch";
@@ -607,7 +711,7 @@ in
         in pkgs.writeScript "install-grub.sh" (''
         #!${pkgs.runtimeShell}
         set -e
-        export PERL5LIB=${with pkgs.perlPackages; makePerlPath [ FileSlurp XMLLibXML XMLSAX XMLSAXBase ListCompare ]}
+        export PERL5LIB=${with pkgs.perlPackages; makePerlPath [ FileSlurp FileCopyRecursive XMLLibXML XMLSAX XMLSAXBase ListCompare JSON ]}
         ${optionalString cfg.enableCryptodisk "export GRUB_ENABLE_CRYPTODISK=y"}
       '' + flip concatMapStrings cfg.mirroredBoots (args: ''
         ${pkgs.perl}/bin/perl ${install-grub-pl} ${grubConfig args} $@
diff --git a/nixpkgs/nixos/modules/system/boot/loader/grub/install-grub.pl b/nixpkgs/nixos/modules/system/boot/loader/grub/install-grub.pl
index e469b18abd09..59f5638044fe 100644
--- a/nixpkgs/nixos/modules/system/boot/loader/grub/install-grub.pl
+++ b/nixpkgs/nixos/modules/system/boot/loader/grub/install-grub.pl
@@ -6,8 +6,11 @@ use File::Basename;
 use File::Path;
 use File::stat;
 use File::Copy;
+use File::Copy::Recursive qw(rcopy pathrm);
 use File::Slurp;
 use File::Temp;
+use JSON;
+use File::Find;
 require List::Compare;
 use POSIX;
 use Cwd;
@@ -20,6 +23,16 @@ my $dom = XML::LibXML->load_xml(location => $ARGV[0]);
 
 sub get { my ($name) = @_; return $dom->findvalue("/expr/attrs/attr[\@name = '$name']/*/\@value"); }
 
+sub getList {
+    my ($name) = @_;
+    my @list = ();
+    foreach my $entry ($dom->findnodes("/expr/attrs/attr[\@name = '$name']/list/string/\@value")) {
+        $entry = $entry->findvalue(".") or die;
+        push(@list, $entry);
+    }
+    return @list;
+}
+
 sub readFile {
     my ($fn) = @_; local $/ = undef;
     open FILE, "<$fn" or return undef; my $s = <FILE>; close FILE;
@@ -71,6 +84,7 @@ my $gfxpayloadBios = get("gfxpayloadBios");
 my $bootloaderId = get("bootloaderId");
 my $forceInstall = get("forceInstall");
 my $font = get("font");
+my $theme = get("theme");
 $ENV{'PATH'} = get("path");
 
 die "unsupported GRUB version\n" if $grubVersion != 1 && $grubVersion != 2;
@@ -241,12 +255,51 @@ if ($grubVersion == 1) {
         timeout $timeout
     ";
     if ($splashImage) {
-        copy $splashImage, "$bootPath/background.xpm.gz" or die "cannot copy $splashImage to $bootPath\n";
+        copy $splashImage, "$bootPath/background.xpm.gz" or die "cannot copy $splashImage to $bootPath: $!\n";
         $conf .= "splashimage " . ($grubBoot->path eq "/" ? "" : $grubBoot->path) . "/background.xpm.gz\n";
     }
 }
 
 else {
+    my @users = ();
+    foreach my $user ($dom->findnodes('/expr/attrs/attr[@name = "users"]/attrs/attr')) {
+        my $name = $user->findvalue('@name') or die;
+        my $hashedPassword = $user->findvalue('./attrs/attr[@name = "hashedPassword"]/string/@value');
+        my $hashedPasswordFile = $user->findvalue('./attrs/attr[@name = "hashedPasswordFile"]/string/@value');
+        my $password = $user->findvalue('./attrs/attr[@name = "password"]/string/@value');
+        my $passwordFile = $user->findvalue('./attrs/attr[@name = "passwordFile"]/string/@value');
+
+        if ($hashedPasswordFile) {
+            open(my $f, '<', $hashedPasswordFile) or die "Can't read file '$hashedPasswordFile'!";
+            $hashedPassword = <$f>;
+            chomp $hashedPassword;
+        }
+        if ($passwordFile) {
+            open(my $f, '<', $passwordFile) or die "Can't read file '$passwordFile'!";
+            $password = <$f>;
+            chomp $password;
+        }
+
+        if ($hashedPassword) {
+            if (index($hashedPassword, "grub.pbkdf2.") == 0) {
+                $conf .= "\npassword_pbkdf2 $name $hashedPassword";
+            }
+            else {
+                die "Password hash for GRUB user '$name' is not valid!";
+            }
+        }
+        elsif ($password) {
+            $conf .= "\npassword $name $password";
+        }
+        else {
+            die "GRUB user '$name' has no password!";
+        }
+        push(@users, $name);
+    }
+    if (@users) {
+        $conf .= "\nset superusers=\"" . join(' ',@users) . "\"\n";
+    }
+
     if ($copyKernels == 0) {
         $conf .= "
             " . $grubStore->search;
@@ -280,7 +333,7 @@ else {
     ";
 
     if ($font) {
-        copy $font, "$bootPath/converted-font.pf2" or die "cannot copy $font to $bootPath\n";
+        copy $font, "$bootPath/converted-font.pf2" or die "cannot copy $font to $bootPath: $!\n";
         $conf .= "
             insmod font
             if loadfont " . ($grubBoot->path eq "/" ? "" : $grubBoot->path) . "/converted-font.pf2; then
@@ -308,7 +361,7 @@ else {
 		    background_color '$backgroundColor'
 		    ";
 		}
-        copy $splashImage, "$bootPath/background$suffix" or die "cannot copy $splashImage to $bootPath\n";
+        copy $splashImage, "$bootPath/background$suffix" or die "cannot copy $splashImage to $bootPath: $!\n";
         $conf .= "
             insmod " . substr($suffix, 1) . "
             if background_image --mode '$splashMode' " . ($grubBoot->path eq "/" ? "" : $grubBoot->path) . "/background$suffix; then
@@ -320,6 +373,28 @@ else {
             fi
         ";
     }
+
+    rmtree("$bootPath/theme") or die "cannot clean up theme folder in $bootPath\n" if -e "$bootPath/theme";
+
+    if ($theme) {
+        # Copy theme
+        rcopy($theme, "$bootPath/theme") or die "cannot copy $theme to $bootPath\n";
+        $conf .= "
+            # Sets theme.
+            set theme=" . ($grubBoot->path eq "/" ? "" : $grubBoot->path) . "/theme/theme.txt
+            export theme
+            # Load theme fonts, if any
+         ";
+
+         find( { wanted => sub {
+             if ($_ =~ /\.pf2$/i) {
+                 $font = File::Spec->abs2rel($File::Find::name, $theme);
+                 $conf .= "
+                     loadfont " . ($grubBoot->path eq "/" ? "" : $grubBoot->path) . "/theme/$font
+                 ";
+             }
+         }, no_chdir => 1 }, $theme );
+     }
 }
 
 $conf .= "$extraConfig\n";
@@ -342,15 +417,15 @@ sub copyToKernelsDir {
     # kernels or initrd if this script is ever interrupted.
     if (! -e $dst) {
         my $tmp = "$dst.tmp";
-        copy $path, $tmp or die "cannot copy $path to $tmp\n";
-        rename $tmp, $dst or die "cannot rename $tmp to $dst\n";
+        copy $path, $tmp or die "cannot copy $path to $tmp: $!\n";
+        rename $tmp, $dst or die "cannot rename $tmp to $dst: $!\n";
     }
     $copied{$dst} = 1;
     return ($grubBoot->path eq "/" ? "" : $grubBoot->path) . "/kernels/$name";
 }
 
 sub addEntry {
-    my ($name, $path) = @_;
+    my ($name, $path, $options) = @_;
     return unless -e "$path/kernel" && -e "$path/initrd";
 
     my $kernel = copyToKernelsDir(Cwd::abs_path("$path/kernel"));
@@ -366,10 +441,10 @@ sub addEntry {
       # Make sure initrd is not world readable (won't work if /boot is FAT)
       umask 0137;
       my $initrdSecretsPathTemp = File::Temp::mktemp("$initrdSecretsPath.XXXXXXXX");
-      system("$path/append-initrd-secrets", $initrdSecretsPathTemp) == 0 or die "failed to create initrd secrets\n";
+      system("$path/append-initrd-secrets", $initrdSecretsPathTemp) == 0 or die "failed to create initrd secrets: $!\n";
       # Check whether any secrets were actually added
       if (-e $initrdSecretsPathTemp && ! -z _) {
-        rename $initrdSecretsPathTemp, $initrdSecretsPath or die "failed to move initrd secrets into place\n";
+        rename $initrdSecretsPathTemp, $initrdSecretsPath or die "failed to move initrd secrets into place: $!\n";
         $copied{$initrdSecretsPath} = 1;
         $initrd .= " " . ($grubBoot->path eq "/" ? "" : $grubBoot->path) . "/kernels/$initrdName-secrets";
       } else {
@@ -396,7 +471,7 @@ sub addEntry {
         $conf .= "  " . ($xen ? "module" : "kernel") . " $kernel $kernelParams\n";
         $conf .= "  " . ($xen ? "module" : "initrd") . " $initrd\n\n";
     } else {
-        $conf .= "menuentry \"$name\" {\n";
+        $conf .= "menuentry \"$name\" " . ($options||"") . " {\n";
         $conf .= $grubBoot->search . "\n";
         if ($copyKernels == 0) {
             $conf .= $grubStore->search . "\n";
@@ -413,7 +488,7 @@ sub addEntry {
 # Add default entries.
 $conf .= "$extraEntries\n" if $extraEntriesBeforeNixOS;
 
-addEntry("NixOS - Default", $defaultConfig);
+addEntry("NixOS - Default", $defaultConfig, "--unrestricted");
 
 $conf .= "$extraEntries\n" unless $extraEntriesBeforeNixOS;
 
@@ -536,7 +611,7 @@ if (get("useOSProber") eq "true") {
 }
 
 # Atomically switch to the new config
-rename $tmpFile, $confFile or die "cannot rename $tmpFile to $confFile\n";
+rename $tmpFile, $confFile or die "cannot rename $tmpFile to $confFile: $!\n";
 
 
 # Remove obsolete files from $bootPath/kernels.
@@ -557,9 +632,12 @@ struct(GrubState => {
     efi => '$',
     devices => '$',
     efiMountPoint => '$',
+    extraGrubInstallArgs => '@',
 });
+# If you add something to the state file, only add it to the end
+# because it is read line-by-line.
 sub readGrubState {
-    my $defaultGrubState = GrubState->new(name => "", version => "", efi => "", devices => "", efiMountPoint => "" );
+    my $defaultGrubState = GrubState->new(name => "", version => "", efi => "", devices => "", efiMountPoint => "", extraGrubInstallArgs => () );
     open FILE, "<$bootPath/grub/state" or return $defaultGrubState;
     local $/ = "\n";
     my $name = <FILE>;
@@ -572,24 +650,37 @@ sub readGrubState {
     chomp($devices);
     my $efiMountPoint = <FILE>;
     chomp($efiMountPoint);
+    # Historically, arguments in the state file were one per each line, but that
+    # gets really messy when newlines are involved, structured arguments
+    # like lists are needed (they have to have a separator encoding), or even worse,
+    # when we need to remove a setting in the future. Thus, the 6th line is a JSON
+    # object that can store structured data, with named keys, and all new state
+    # should go in there.
+    my $jsonStateLine = <FILE>;
+    # For historical reasons we do not check the values above for un-definedness
+    # (that is, when the state file has too few lines and EOF is reached),
+    # because the above come from the first version of this logic and are thus
+    # guaranteed to be present.
+    $jsonStateLine = defined $jsonStateLine ? $jsonStateLine : '{}'; # empty JSON object
+    chomp($jsonStateLine);
+    if ($jsonStateLine eq "") {
+        $jsonStateLine = '{}'; # empty JSON object
+    }
+    my %jsonState = %{decode_json($jsonStateLine)};
+    my @extraGrubInstallArgs = exists($jsonState{'extraGrubInstallArgs'}) ? @{$jsonState{'extraGrubInstallArgs'}} : ();
     close FILE;
-    my $grubState = GrubState->new(name => $name, version => $version, efi => $efi, devices => $devices, efiMountPoint => $efiMountPoint );
+    my $grubState = GrubState->new(name => $name, version => $version, efi => $efi, devices => $devices, efiMountPoint => $efiMountPoint, extraGrubInstallArgs => \@extraGrubInstallArgs );
     return $grubState
 }
 
-sub getDeviceTargets {
-    my @devices = ();
-    foreach my $dev ($dom->findnodes('/expr/attrs/attr[@name = "devices"]/list/string/@value')) {
-        $dev = $dev->findvalue(".") or die;
-        push(@devices, $dev);
-    }
-    return @devices;
-}
-my @deviceTargets = getDeviceTargets();
+my @deviceTargets = getList('devices');
 my $prevGrubState = readGrubState();
 my @prevDeviceTargets = split/,/, $prevGrubState->devices;
+my @extraGrubInstallArgs = getList('extraGrubInstallArgs');
+my @prevExtraGrubInstallArgs = @{$prevGrubState->extraGrubInstallArgs};
 
 my $devicesDiffer = scalar (List::Compare->new( '-u', '-a', \@deviceTargets, \@prevDeviceTargets)->get_symmetric_difference());
+my $extraGrubInstallArgsDiffer = scalar (List::Compare->new( '-u', '-a', \@extraGrubInstallArgs, \@prevExtraGrubInstallArgs)->get_symmetric_difference());
 my $nameDiffer = get("fullName") ne $prevGrubState->name;
 my $versionDiffer = get("fullVersion") ne $prevGrubState->version;
 my $efiDiffer = $efiTarget ne $prevGrubState->efi;
@@ -598,25 +689,25 @@ if (($ENV{'NIXOS_INSTALL_GRUB'} // "") eq "1") {
     warn "NIXOS_INSTALL_GRUB env var deprecated, use NIXOS_INSTALL_BOOTLOADER";
     $ENV{'NIXOS_INSTALL_BOOTLOADER'} = "1";
 }
-my $requireNewInstall = $devicesDiffer || $nameDiffer || $versionDiffer || $efiDiffer || $efiMountPointDiffer || (($ENV{'NIXOS_INSTALL_BOOTLOADER'} // "") eq "1");
+my $requireNewInstall = $devicesDiffer || $extraGrubInstallArgsDiffer || $nameDiffer || $versionDiffer || $efiDiffer || $efiMountPointDiffer || (($ENV{'NIXOS_INSTALL_BOOTLOADER'} // "") eq "1");
 
 # install a symlink so that grub can detect the boot drive
-my $tmpDir = File::Temp::tempdir(CLEANUP => 1) or die "Failed to create temporary space";
-symlink "$bootPath", "$tmpDir/boot" or die "Failed to symlink $tmpDir/boot";
+my $tmpDir = File::Temp::tempdir(CLEANUP => 1) or die "Failed to create temporary space: $!";
+symlink "$bootPath", "$tmpDir/boot" or die "Failed to symlink $tmpDir/boot: $!";
 
 # install non-EFI GRUB
 if (($requireNewInstall != 0) && ($efiTarget eq "no" || $efiTarget eq "both")) {
     foreach my $dev (@deviceTargets) {
         next if $dev eq "nodev";
         print STDERR "installing the GRUB $grubVersion boot loader on $dev...\n";
-        my @command = ("$grub/sbin/grub-install", "--recheck", "--root-directory=$tmpDir", Cwd::abs_path($dev));
+        my @command = ("$grub/sbin/grub-install", "--recheck", "--root-directory=$tmpDir", Cwd::abs_path($dev), @extraGrubInstallArgs);
         if ($forceInstall eq "true") {
             push @command, "--force";
         }
         if ($grubTarget ne "") {
             push @command, "--target=$grubTarget";
         }
-        (system @command) == 0 or die "$0: installation of GRUB on $dev failed\n";
+        (system @command) == 0 or die "$0: installation of GRUB on $dev failed: $!\n";
     }
 }
 
@@ -624,7 +715,7 @@ if (($requireNewInstall != 0) && ($efiTarget eq "no" || $efiTarget eq "both")) {
 # install EFI GRUB
 if (($requireNewInstall != 0) && ($efiTarget eq "only" || $efiTarget eq "both")) {
     print STDERR "installing the GRUB $grubVersion EFI boot loader into $efiSysMountPoint...\n";
-    my @command = ("$grubEfi/sbin/grub-install", "--recheck", "--target=$grubTargetEfi", "--boot-directory=$bootPath", "--efi-directory=$efiSysMountPoint");
+    my @command = ("$grubEfi/sbin/grub-install", "--recheck", "--target=$grubTargetEfi", "--boot-directory=$bootPath", "--efi-directory=$efiSysMountPoint", @extraGrubInstallArgs);
     if ($forceInstall eq "true") {
         push @command, "--force";
     }
@@ -635,17 +726,29 @@ if (($requireNewInstall != 0) && ($efiTarget eq "only" || $efiTarget eq "both"))
         push @command, "--removable" if $efiInstallAsRemovable eq "true";
     }
 
-    (system @command) == 0 or die "$0: installation of GRUB EFI into $efiSysMountPoint failed\n";
+    (system @command) == 0 or die "$0: installation of GRUB EFI into $efiSysMountPoint failed: $!\n";
 }
 
 
 # update GRUB state file
 if ($requireNewInstall != 0) {
-    open FILE, ">$bootPath/grub/state" or die "cannot create $bootPath/grub/state: $!\n";
+    # Temp file for atomic rename.
+    my $stateFile = "$bootPath/grub/state";
+    my $stateFileTmp = $stateFile . ".tmp";
+
+    open FILE, ">$stateFileTmp" or die "cannot create $stateFileTmp: $!\n";
     print FILE get("fullName"), "\n" or die;
     print FILE get("fullVersion"), "\n" or die;
     print FILE $efiTarget, "\n" or die;
     print FILE join( ",", @deviceTargets ), "\n" or die;
     print FILE $efiSysMountPoint, "\n" or die;
+    my %jsonState = (
+        extraGrubInstallArgs => \@extraGrubInstallArgs
+    );
+    my $jsonStateLine = encode_json(\%jsonState);
+    print FILE $jsonStateLine, "\n" or die;
     close FILE or die;
+
+    # Atomically switch to the new state file
+    rename $stateFileTmp, $stateFile or die "cannot rename $stateFileTmp to $stateFile: $!\n";
 }
diff --git a/nixpkgs/nixos/modules/system/boot/loader/init-script/init-script-builder.sh b/nixpkgs/nixos/modules/system/boot/loader/init-script/init-script-builder.sh
index 6f48d2539ace..2a1ec479fea0 100644
--- a/nixpkgs/nixos/modules/system/boot/loader/init-script/init-script-builder.sh
+++ b/nixpkgs/nixos/modules/system/boot/loader/init-script/init-script-builder.sh
@@ -53,7 +53,7 @@ addEntry() {
       echo "exec $stage2"
     )"
 
-    [ "$path" != "$defaultConfig" ] || { 
+    [ "$path" != "$defaultConfig" ] || {
       echo "$content" > $tmp
       echo "# older configurations: $targetOther" >> $tmp
       chmod +x $tmp
diff --git a/nixpkgs/nixos/modules/system/boot/loader/raspberrypi/raspberrypi-builder.nix b/nixpkgs/nixos/modules/system/boot/loader/raspberrypi/raspberrypi-builder.nix
index e75aa9d13875..7eb52e3d021f 100644
--- a/nixpkgs/nixos/modules/system/boot/loader/raspberrypi/raspberrypi-builder.nix
+++ b/nixpkgs/nixos/modules/system/boot/loader/raspberrypi/raspberrypi-builder.nix
@@ -3,8 +3,8 @@
 pkgs.substituteAll {
   src = ./raspberrypi-builder.sh;
   isExecutable = true;
-  inherit (pkgs.buildPackages) bash;
-  path = with pkgs.buildPackages; [coreutils gnused gnugrep];
+  inherit (pkgs) bash;
+  path = [pkgs.coreutils pkgs.gnused pkgs.gnugrep];
   firmware = pkgs.raspberrypifw;
   inherit configTxt;
 }
diff --git a/nixpkgs/nixos/modules/system/boot/loader/raspberrypi/raspberrypi-builder.sh b/nixpkgs/nixos/modules/system/boot/loader/raspberrypi/raspberrypi-builder.sh
index c8b5bf2e61af..0541ca1ba622 100644
--- a/nixpkgs/nixos/modules/system/boot/loader/raspberrypi/raspberrypi-builder.sh
+++ b/nixpkgs/nixos/modules/system/boot/loader/raspberrypi/raspberrypi-builder.sh
@@ -1,4 +1,7 @@
-#! @bash@/bin/sh -e
+#! @bash@/bin/sh
+
+# This can end up being called disregarding the shebang.
+set -e
 
 shopt -s nullglob
 
diff --git a/nixpkgs/nixos/modules/system/boot/loader/systemd-boot/systemd-boot-builder.py b/nixpkgs/nixos/modules/system/boot/loader/systemd-boot/systemd-boot-builder.py
index d8baed65c6df..65c7b825f855 100644
--- a/nixpkgs/nixos/modules/system/boot/loader/systemd-boot/systemd-boot-builder.py
+++ b/nixpkgs/nixos/modules/system/boot/loader/systemd-boot/systemd-boot-builder.py
@@ -47,9 +47,9 @@ def write_loader_conf(profile, generation):
         if "@timeout@" != "":
             f.write("timeout @timeout@\n")
         if profile:
-            f.write("default nixos-%s-generation-%d.conf\n".format(profile, generation))
+            f.write("default nixos-%s-generation-%d.conf\n" % (profile, generation))
         else:
-            f.write("default nixos-generation-%d.conf\n".format(generation))
+            f.write("default nixos-generation-%d.conf\n" % (generation))
         if not @editor@:
             f.write("editor 0\n");
         f.write("console-mode @consoleMode@\n");
@@ -200,7 +200,9 @@ def main():
     else:
         # Update bootloader to latest if needed
         systemd_version = subprocess.check_output(["@systemd@/bin/bootctl", "--version"], universal_newlines=True).split()[1]
-        sdboot_status = subprocess.check_output(["@systemd@/bin/bootctl", "--path=@efiSysMountPoint@", "status"], universal_newlines=True)
+        # Ideally this should use check_output as well, but as a temporary
+        # work-around for #97433 we ignore any errors.
+        sdboot_status = subprocess.run(["@systemd@/bin/bootctl", "--path=@efiSysMountPoint@", "status"], universal_newlines=True, stdout=subprocess.PIPE).stdout
 
         # See status_binaries() in systemd bootctl.c for code which generates this
         m = re.search("^\W+File:.*/EFI/(BOOT|systemd)/.*\.efi \(systemd-boot (\d+)\)$",
diff --git a/nixpkgs/nixos/modules/system/boot/loader/systemd-boot/systemd-boot.nix b/nixpkgs/nixos/modules/system/boot/loader/systemd-boot/systemd-boot.nix
index 22d459ceb04f..f0bd76a3c1d2 100644
--- a/nixpkgs/nixos/modules/system/boot/loader/systemd-boot/systemd-boot.nix
+++ b/nixpkgs/nixos/modules/system/boot/loader/systemd-boot/systemd-boot.nix
@@ -64,10 +64,10 @@ in {
       example = 120;
       type = types.nullOr types.int;
       description = ''
-        Maximum number of latest generations in the boot menu. 
+        Maximum number of latest generations in the boot menu.
         Useful to prevent boot partition running out of disk space.
 
-        <literal>null</literal> means no limit i.e. all generations 
+        <literal>null</literal> means no limit i.e. all generations
         that were not garbage collected yet.
       '';
     };
diff --git a/nixpkgs/nixos/modules/system/boot/luksroot.nix b/nixpkgs/nixos/modules/system/boot/luksroot.nix
index 31f1e22cda32..88190e8200b1 100644
--- a/nixpkgs/nixos/modules/system/boot/luksroot.nix
+++ b/nixpkgs/nixos/modules/system/boot/luksroot.nix
@@ -140,7 +140,7 @@ let
     umount /crypt-ramfs 2>/dev/null
   '';
 
-  openCommand = name': { name, device, header, keyFile, keyFileSize, keyFileOffset, allowDiscards, yubikey, gpgCard, fido2, fallbackToPassword, ... }: assert name' == name;
+  openCommand = name': { name, device, header, keyFile, keyFileSize, keyFileOffset, allowDiscards, yubikey, gpgCard, fido2, fallbackToPassword, preOpenCommands, postOpenCommands,... }: assert name' == name;
   let
     csopen   = "cryptsetup luksOpen ${device} ${name} ${optionalString allowDiscards "--allow-discards"} ${optionalString (header != null) "--header=${header}"}";
     cschange = "cryptsetup luksChangeKey ${device} ${optionalString (header != null) "--header=${header}"}";
@@ -412,11 +412,17 @@ let
     }
     ''}
 
+    # commands to run right before we mount our device
+    ${preOpenCommands}
+
     ${if (luks.yubikeySupport && (yubikey != null)) || (luks.gpgSupport && (gpgCard != null)) || (luks.fido2Support && (fido2.credential != null)) then ''
     open_with_hardware
     '' else ''
     open_normally
     ''}
+
+    # commands to run right after we mounted our device
+    ${postOpenCommands}
   '';
 
   askPass = pkgs.writeScriptBin "cryptsetup-askpass" ''
@@ -467,8 +473,6 @@ in
         [ "aes" "aes_generic" "blowfish" "twofish"
           "serpent" "cbc" "xts" "lrw" "sha1" "sha256" "sha512"
           "af_alg" "algif_skcipher"
-
-          (if pkgs.stdenv.hostPlatform.system == "x86_64-linux" then "aes_x86_64" else "aes_i586")
         ];
       description = ''
         A list of cryptographic kernel modules needed to decrypt the root device(s).
@@ -512,7 +516,7 @@ in
         <filename>/dev/mapper/<replaceable>name</replaceable></filename>.
       '';
 
-      type = with types; loaOf (submodule (
+      type = with types; attrsOf (submodule (
         { name, ... }: { options = {
 
           name = mkOption {
@@ -637,7 +641,7 @@ in
             credential = mkOption {
               default = null;
               example = "f1d00200d8dc783f7fb1e10ace8da27f8312d72692abfca2f7e4960a73f48e82e1f7571f6ebfcee9fb434f9886ccc8fcc52a6614d8d2";
-              type = types.str;
+              type = types.nullOr types.str;
               description = "The FIDO2 credential ID.";
             };
 
@@ -735,6 +739,30 @@ in
               };
             });
           };
+
+          preOpenCommands = mkOption {
+            type = types.lines;
+            default = "";
+            example = ''
+              mkdir -p /tmp/persistent
+              mount -t zfs rpool/safe/persistent /tmp/persistent
+            '';
+            description = ''
+              Commands that should be run right before we try to mount our LUKS device.
+              This can be useful, if the keys needed to open the drive is on another partion.
+            '';
+          };
+
+          postOpenCommands = mkOption {
+            type = types.lines;
+            default = "";
+            example = ''
+              umount /tmp/persistent
+            '';
+            description = ''
+              Commands that should be run right after we have mounted our LUKS device.
+            '';
+          };
         };
       }));
     };
diff --git a/nixpkgs/nixos/modules/system/boot/modprobe.nix b/nixpkgs/nixos/modules/system/boot/modprobe.nix
index dee0ab470c99..c75f32c4d99a 100644
--- a/nixpkgs/nixos/modules/system/boot/modprobe.nix
+++ b/nixpkgs/nixos/modules/system/boot/modprobe.nix
@@ -28,7 +28,7 @@ with lib;
         Any additional configuration to be appended to the generated
         <filename>modprobe.conf</filename>.  This is typically used to
         specify module options.  See
-        <citerefentry><refentrytitle>modprobe.conf</refentrytitle>
+        <citerefentry><refentrytitle>modprobe.d</refentrytitle>
         <manvolnum>5</manvolnum></citerefentry> for details.
       '';
       type = types.lines;
diff --git a/nixpkgs/nixos/modules/system/boot/networkd.nix b/nixpkgs/nixos/modules/system/boot/networkd.nix
index b0545363b330..47689b2a4700 100644
--- a/nixpkgs/nixos/modules/system/boot/networkd.nix
+++ b/nixpkgs/nixos/modules/system/boot/networkd.nix
@@ -8,359 +8,714 @@ let
 
   cfg = config.systemd.network;
 
-  checkLink = checkUnitConfig "Link" [
-    (assertOnlyFields [
-      "Description" "Alias" "MACAddressPolicy" "MACAddress" "NamePolicy" "Name" "OriginalName"
-      "MTUBytes" "BitsPerSecond" "Duplex" "AutoNegotiation" "WakeOnLan" "Port" "Advertise"
-      "TCPSegmentationOffload" "TCP6SegmentationOffload" "GenericSegmentationOffload"
-      "GenericReceiveOffload" "LargeReceiveOffload" "RxChannels" "TxChannels"
-      "OtherChannels" "CombinedChannels"
-    ])
-    (assertValueOneOf "MACAddressPolicy" ["persistent" "random" "none"])
-    (assertMacAddress "MACAddress")
-    (assertByteFormat "MTUBytes")
-    (assertByteFormat "BitsPerSecond")
-    (assertValueOneOf "Duplex" ["half" "full"])
-    (assertValueOneOf "AutoNegotiation" boolValues)
-    (assertValueOneOf "WakeOnLan" ["phy" "unicast" "multicast" "broadcast" "arp" "magic" "secureon" "off"])
-    (assertValueOneOf "Port" ["tp" "aui" "bnc" "mii" "fibre"])
-    (assertValueOneOf "TCPSegmentationOffload" boolValues)
-    (assertValueOneOf "TCP6SegmentationOffload" boolValues)
-    (assertValueOneOf "GenericSegmentationOffload" boolValues)
-    (assertValueOneOf "UDPSegmentationOffload" boolValues)
-    (assertValueOneOf "GenericReceiveOffload" boolValues)
-    (assertValueOneOf "LargeReceiveOffload" boolValues)
-    (assertInt "RxChannels")
-    (assertMinimum "RxChannels" 1)
-    (assertInt "TxChannels")
-    (assertMinimum "TxChannels" 1)
-    (assertInt "OtherChannels")
-    (assertMinimum "OtherChannels" 1)
-    (assertInt "CombinedChannels")
-    (assertMinimum "CombinedChannels" 1)
-  ];
-
-  checkNetdev = checkUnitConfig "Netdev" [
-    (assertOnlyFields [
-      "Description" "Name" "Kind" "MTUBytes" "MACAddress"
-    ])
-    (assertHasField "Name")
-    (assertHasField "Kind")
-    (assertValueOneOf "Kind" [
-      "bond" "bridge" "dummy" "gre" "gretap" "ip6gre" "ip6tnl" "ip6gretap" "ipip"
-      "ipvlan" "macvlan" "macvtap" "sit" "tap" "tun" "veth" "vlan" "vti" "vti6"
-      "vxlan" "geneve" "vrf" "vcan" "vxcan" "wireguard" "netdevsim" "xfrm"
-    ])
-    (assertByteFormat "MTUBytes")
-    (assertMacAddress "MACAddress")
-  ];
-
-  checkVRF = checkUnitConfig "VRF" [
-    (assertOnlyFields [ "Table" ])
-    (assertMinimum "Table" 0)
-  ];
+  check = {
+
+    link = {
+
+      sectionLink = checkUnitConfig "Link" [
+        (assertOnlyFields [
+          "Description"
+          "Alias"
+          "MACAddressPolicy"
+          "MACAddress"
+          "NamePolicy"
+          "Name"
+          "AlternativeNamesPolicy"
+          "AlternativeName"
+          "MTUBytes"
+          "BitsPerSecond"
+          "Duplex"
+          "AutoNegotiation"
+          "WakeOnLan"
+          "Port"
+          "Advertise"
+          "ReceiveChecksumOffload"
+          "TransmitChecksumOffload"
+          "TCPSegmentationOffload"
+          "TCP6SegmentationOffload"
+          "GenericSegmentationOffload"
+          "GenericReceiveOffload"
+          "LargeReceiveOffload"
+          "RxChannels"
+          "TxChannels"
+          "OtherChannels"
+          "CombinedChannels"
+          "RxBufferSize"
+          "TxBufferSize"
+        ])
+        (assertValueOneOf "MACAddressPolicy" ["persistent" "random" "none"])
+        (assertMacAddress "MACAddress")
+        (assertByteFormat "MTUBytes")
+        (assertByteFormat "BitsPerSecond")
+        (assertValueOneOf "Duplex" ["half" "full"])
+        (assertValueOneOf "AutoNegotiation" boolValues)
+        (assertValueOneOf "WakeOnLan" ["phy" "unicast" "multicast" "broadcast" "arp" "magic" "secureon" "off"])
+        (assertValueOneOf "Port" ["tp" "aui" "bnc" "mii" "fibre"])
+        (assertValueOneOf "ReceiveChecksumOffload" boolValues)
+        (assertValueOneOf "TransmitChecksumOffload" boolValues)
+        (assertValueOneOf "TCPSegmentationOffload" boolValues)
+        (assertValueOneOf "TCP6SegmentationOffload" boolValues)
+        (assertValueOneOf "GenericSegmentationOffload" boolValues)
+        (assertValueOneOf "GenericReceiveOffload" boolValues)
+        (assertValueOneOf "LargeReceiveOffload" boolValues)
+        (assertInt "RxChannels")
+        (assertRange "RxChannels" 1 4294967295)
+        (assertInt "TxChannels")
+        (assertRange "TxChannels" 1 4294967295)
+        (assertInt "OtherChannels")
+        (assertRange "OtherChannels" 1 4294967295)
+        (assertInt "CombinedChannels")
+        (assertRange "CombinedChannels" 1 4294967295)
+        (assertInt "RxBufferSize")
+        (assertInt "TxBufferSize")
+      ];
+    };
 
-  # NOTE The PrivateKey directive is missing on purpose here, please
-  # do not add it to this list. The nix store is world-readable let's
-  # refrain ourselves from providing a footgun.
-  checkWireGuard = checkUnitConfig "WireGuard" [
-    (assertOnlyFields [
-      "PrivateKeyFile" "ListenPort" "FwMark"
-    ])
-    # The following check won't work on nix <= 2.2
-    # see https://github.com/NixOS/nix/pull/2378
-    #
-    # Add this again when we'll have drop the
-    # nix < 2.2 support.
-    # (assertRange "FwMark" 1 4294967295)
-  ];
+    netdev = let
+
+      tunChecks = [
+        (assertOnlyFields [
+          "MultiQueue"
+          "PacketInfo"
+          "VNetHeader"
+          "User"
+          "Group"
+        ])
+        (assertValueOneOf "MultiQueue" boolValues)
+        (assertValueOneOf "PacketInfo" boolValues)
+        (assertValueOneOf "VNetHeader" boolValues)
+      ];
+    in {
+
+      sectionNetdev = checkUnitConfig "Netdev" [
+        (assertOnlyFields [
+          "Description"
+          "Name"
+          "Kind"
+          "MTUBytes"
+          "MACAddress"
+        ])
+        (assertHasField "Name")
+        (assertHasField "Kind")
+        (assertValueOneOf "Kind" [
+          "bond"
+          "bridge"
+          "dummy"
+          "gre"
+          "gretap"
+          "erspan"
+          "ip6gre"
+          "ip6tnl"
+          "ip6gretap"
+          "ipip"
+          "ipvlan"
+          "macvlan"
+          "macvtap"
+          "sit"
+          "tap"
+          "tun"
+          "veth"
+          "vlan"
+          "vti"
+          "vti6"
+          "vxlan"
+          "geneve"
+          "l2tp"
+          "macsec"
+          "vrf"
+          "vcan"
+          "vxcan"
+          "wireguard"
+          "netdevsim"
+          "nlmon"
+          "fou"
+          "xfrm"
+          "ifb"
+        ])
+        (assertByteFormat "MTUBytes")
+        (assertMacAddress "MACAddress")
+      ];
 
-  # NOTE The PresharedKey directive is missing on purpose here, please
-  # do not add it to this list. The nix store is world-readable,let's
-  # refrain ourselves from providing a footgun.
-  checkWireGuardPeer = checkUnitConfig "WireGuardPeer" [
-    (assertOnlyFields [
-      "PublicKey" "PresharedKeyFile" "AllowedIPs"
-      "Endpoint" "PersistentKeepalive"
-    ])
-    (assertRange "PersistentKeepalive" 1 65535)
-  ];
+      sectionVLAN = checkUnitConfig "VLAN" [
+        (assertOnlyFields [
+          "Id"
+          "GVRP"
+          "MVRP"
+          "LooseBinding"
+          "ReorderHeader"
+        ])
+        (assertInt "Id")
+        (assertRange "Id" 0 4094)
+        (assertValueOneOf "GVRP" boolValues)
+        (assertValueOneOf "MVRP" boolValues)
+        (assertValueOneOf "LooseBinding" boolValues)
+        (assertValueOneOf "ReorderHeader" boolValues)
+      ];
 
-  checkVlan = checkUnitConfig "VLAN" [
-    (assertOnlyFields ["Id" "GVRP" "MVRP" "LooseBinding" "ReorderHeader"])
-    (assertRange "Id" 0 4094)
-    (assertValueOneOf "GVRP" boolValues)
-    (assertValueOneOf "MVRP" boolValues)
-    (assertValueOneOf "LooseBinding" boolValues)
-    (assertValueOneOf "ReorderHeader" boolValues)
-  ];
+      sectionMACVLAN = checkUnitConfig "MACVLAN" [
+        (assertOnlyFields [
+          "Mode"
+        ])
+        (assertValueOneOf "Mode" ["private" "vepa" "bridge" "passthru"])
+      ];
 
-  checkMacvlan = checkUnitConfig "MACVLAN" [
-    (assertOnlyFields ["Mode"])
-    (assertValueOneOf "Mode" ["private" "vepa" "bridge" "passthru"])
-  ];
+      sectionVXLAN = checkUnitConfig "VXLAN" [
+        (assertOnlyFields [
+          "VNI"
+          "Remote"
+          "Local"
+          "Group"
+          "TOS"
+          "TTL"
+          "MacLearning"
+          "FDBAgeingSec"
+          "MaximumFDBEntries"
+          "ReduceARPProxy"
+          "L2MissNotification"
+          "L3MissNotification"
+          "RouteShortCircuit"
+          "UDPChecksum"
+          "UDP6ZeroChecksumTx"
+          "UDP6ZeroChecksumRx"
+          "RemoteChecksumTx"
+          "RemoteChecksumRx"
+          "GroupPolicyExtension"
+          "GenericProtocolExtension"
+          "DestinationPort"
+          "PortRange"
+          "FlowLabel"
+          "IPDoNotFragment"
+        ])
+        (assertInt "VNI")
+        (assertRange "VNI" 1 16777215)
+        (assertValueOneOf "MacLearning" boolValues)
+        (assertInt "MaximumFDBEntries")
+        (assertValueOneOf "ReduceARPProxy" boolValues)
+        (assertValueOneOf "L2MissNotification" boolValues)
+        (assertValueOneOf "L3MissNotification" boolValues)
+        (assertValueOneOf "RouteShortCircuit" boolValues)
+        (assertValueOneOf "UDPChecksum" boolValues)
+        (assertValueOneOf "UDP6ZeroChecksumTx" boolValues)
+        (assertValueOneOf "UDP6ZeroChecksumRx" boolValues)
+        (assertValueOneOf "RemoteChecksumTx" boolValues)
+        (assertValueOneOf "RemoteChecksumRx" boolValues)
+        (assertValueOneOf "GroupPolicyExtension" boolValues)
+        (assertValueOneOf "GenericProtocolExtension" boolValues)
+        (assertInt "FlowLabel")
+        (assertRange "FlowLabel" 0 1048575)
+        (assertValueOneOf "IPDoNotFragment" (boolValues + ["inherit"]))
+      ];
 
-  checkVxlan = checkUnitConfig "VXLAN" [
-    (assertOnlyFields [
-      "Id" "Remote" "Local" "TOS" "TTL" "MacLearning" "FDBAgeingSec"
-      "MaximumFDBEntries" "ReduceARPProxy" "L2MissNotification"
-      "L3MissNotification" "RouteShortCircuit" "UDPChecksum"
-      "UDP6ZeroChecksumTx" "UDP6ZeroChecksumRx" "RemoteChecksumTx"
-      "RemoteChecksumRx" "GroupPolicyExtension" "DestinationPort" "PortRange"
-      "FlowLabel"
-    ])
-    (assertRange "TTL" 0 255)
-    (assertValueOneOf "MacLearning" boolValues)
-    (assertValueOneOf "ReduceARPProxy" boolValues)
-    (assertValueOneOf "L2MissNotification" boolValues)
-    (assertValueOneOf "L3MissNotification" boolValues)
-    (assertValueOneOf "RouteShortCircuit" boolValues)
-    (assertValueOneOf "UDPChecksum" boolValues)
-    (assertValueOneOf "UDP6ZeroChecksumTx" boolValues)
-    (assertValueOneOf "UDP6ZeroChecksumRx" boolValues)
-    (assertValueOneOf "RemoteChecksumTx" boolValues)
-    (assertValueOneOf "RemoteChecksumRx" boolValues)
-    (assertValueOneOf "GroupPolicyExtension" boolValues)
-    (assertRange "FlowLabel" 0 1048575)
-  ];
+      sectionTunnel = checkUnitConfig "Tunnel" [
+        (assertOnlyFields [
+          "Local"
+          "Remote"
+          "TOS"
+          "TTL"
+          "DiscoverPathMTU"
+          "IPv6FlowLabel"
+          "CopyDSCP"
+          "EncapsulationLimit"
+          "Key"
+          "InputKey"
+          "OutputKey"
+          "Mode"
+          "Independent"
+          "AssignToLoopback"
+          "AllowLocalRemote"
+          "FooOverUDP"
+          "FOUDestinationPort"
+          "FOUSourcePort"
+          "Encapsulation"
+          "IPv6RapidDeploymentPrefix"
+          "ISATAP"
+          "SerializeTunneledPackets"
+          "ERSPANIndex"
+        ])
+        (assertInt "TTL")
+        (assertRange "TTL" 0 255)
+        (assertValueOneOf "DiscoverPathMTU" boolValues)
+        (assertValueOneOf "CopyDSCP" boolValues)
+        (assertValueOneOf "Mode" ["ip6ip6" "ipip6" "any"])
+        (assertValueOneOf "Independent" boolValues)
+        (assertValueOneOf "AssignToLoopback" boolValues)
+        (assertValueOneOf "AllowLocalRemote" boolValues)
+        (assertValueOneOf "FooOverUDP" boolValues)
+        (assertPort "FOUDestinationPort")
+        (assertPort "FOUSourcePort")
+        (assertValueOneOf "Encapsulation" ["FooOverUDP" "GenericUDPEncapsulation"])
+        (assertValueOneOf "ISATAP" boolValues)
+        (assertValueOneOf "SerializeTunneledPackets" boolValues)
+        (assertInt "ERSPANIndex")
+        (assertRange "ERSPANIndex" 1 1048575)
+      ];
 
-  checkTunnel = checkUnitConfig "Tunnel" [
-    (assertOnlyFields [
-      "Local" "Remote" "TOS" "TTL" "DiscoverPathMTU" "IPv6FlowLabel" "CopyDSCP"
-      "EncapsulationLimit" "Key" "InputKey" "OutputKey" "Mode" "Independent"
-      "AllowLocalRemote"
-    ])
-    (assertRange "TTL" 0 255)
-    (assertValueOneOf "DiscoverPathMTU" boolValues)
-    (assertValueOneOf "CopyDSCP" boolValues)
-    (assertValueOneOf "Mode" ["ip6ip6" "ipip6" "any"])
-    (assertValueOneOf "Independent" boolValues)
-    (assertValueOneOf "AllowLocalRemote" boolValues)
-  ];
+      sectionPeer = checkUnitConfig "Peer" [
+        (assertOnlyFields [
+          "Name"
+          "MACAddress"
+        ])
+        (assertMacAddress "MACAddress")
+      ];
 
-  checkPeer = checkUnitConfig "Peer" [
-    (assertOnlyFields ["Name" "MACAddress"])
-    (assertMacAddress "MACAddress")
-  ];
+      sectionTun = checkUnitConfig "Tun" tunChecks;
+
+      sectionTap = checkUnitConfig "Tap" tunChecks;
+
+      # NOTE The PrivateKey directive is missing on purpose here, please
+      # do not add it to this list. The nix store is world-readable let's
+      # refrain ourselves from providing a footgun.
+      sectionWireGuard = checkUnitConfig "WireGuard" [
+        (assertOnlyFields [
+          "PrivateKeyFile"
+          "ListenPort"
+          "FirewallMark"
+        ])
+        (assertInt "FirewallMark")
+        (assertRange "FirewallMark" 1 4294967295)
+      ];
 
-  tunTapChecks = [
-    (assertOnlyFields ["OneQueue" "MultiQueue" "PacketInfo" "VNetHeader" "User" "Group"])
-    (assertValueOneOf "OneQueue" boolValues)
-    (assertValueOneOf "MultiQueue" boolValues)
-    (assertValueOneOf "PacketInfo" boolValues)
-    (assertValueOneOf "VNetHeader" boolValues)
-  ];
+      # NOTE The PresharedKey directive is missing on purpose here, please
+      # do not add it to this list. The nix store is world-readable,let's
+      # refrain ourselves from providing a footgun.
+      sectionWireGuardPeer = checkUnitConfig "WireGuardPeer" [
+        (assertOnlyFields [
+          "PublicKey"
+          "PresharedKeyFile"
+          "AllowedIPs"
+          "Endpoint"
+          "PersistentKeepalive"
+        ])
+        (assertInt "PersistentKeepalive")
+        (assertRange "PersistentKeepalive" 0 65535)
+      ];
 
-  checkTun = checkUnitConfig "Tun" tunTapChecks;
-
-  checkTap = checkUnitConfig "Tap" tunTapChecks;
-
-  checkBond = checkUnitConfig "Bond" [
-    (assertOnlyFields [
-      "Mode" "TransmitHashPolicy" "LACPTransmitRate" "MIIMonitorSec"
-      "UpDelaySec" "DownDelaySec" "LearnPacketIntervalSec" "AdSelect"
-      "FailOverMACPolicy" "ARPValidate" "ARPIntervalSec" "ARPIPTargets"
-      "ARPAllTargets" "PrimaryReselectPolicy" "ResendIGMP" "PacketsPerSlave"
-      "GratuitousARP" "AllSlavesActive" "MinLinks"
-    ])
-    (assertValueOneOf "Mode" [
-      "balance-rr" "active-backup" "balance-xor"
-      "broadcast" "802.3ad" "balance-tlb" "balance-alb"
-    ])
-    (assertValueOneOf "TransmitHashPolicy" [
-      "layer2" "layer3+4" "layer2+3" "encap2+3" "encap3+4"
-    ])
-    (assertValueOneOf "LACPTransmitRate" ["slow" "fast"])
-    (assertValueOneOf "AdSelect" ["stable" "bandwidth" "count"])
-    (assertValueOneOf "FailOverMACPolicy" ["none" "active" "follow"])
-    (assertValueOneOf "ARPValidate" ["none" "active" "backup" "all"])
-    (assertValueOneOf "ARPAllTargets" ["any" "all"])
-    (assertValueOneOf "PrimaryReselectPolicy" ["always" "better" "failure"])
-    (assertRange "ResendIGMP" 0 255)
-    (assertRange "PacketsPerSlave" 0 65535)
-    (assertRange "GratuitousARP" 0 255)
-    (assertValueOneOf "AllSlavesActive" boolValues)
-  ];
+      sectionBond = checkUnitConfig "Bond" [
+        (assertOnlyFields [
+          "Mode"
+          "TransmitHashPolicy"
+          "LACPTransmitRate"
+          "MIIMonitorSec"
+          "UpDelaySec"
+          "DownDelaySec"
+          "LearnPacketIntervalSec"
+          "AdSelect"
+          "AdActorSystemPriority"
+          "AdUserPortKey"
+          "AdActorSystem"
+          "FailOverMACPolicy"
+          "ARPValidate"
+          "ARPIntervalSec"
+          "ARPIPTargets"
+          "ARPAllTargets"
+          "PrimaryReselectPolicy"
+          "ResendIGMP"
+          "PacketsPerSlave"
+          "GratuitousARP"
+          "AllSlavesActive"
+          "DynamicTransmitLoadBalancing"
+          "MinLinks"
+        ])
+        (assertValueOneOf "Mode" [
+          "balance-rr"
+          "active-backup"
+          "balance-xor"
+          "broadcast"
+          "802.3ad"
+          "balance-tlb"
+          "balance-alb"
+        ])
+        (assertValueOneOf "TransmitHashPolicy" [
+          "layer2"
+          "layer3+4"
+          "layer2+3"
+          "encap2+3"
+          "encap3+4"
+        ])
+        (assertValueOneOf "LACPTransmitRate" ["slow" "fast"])
+        (assertValueOneOf "AdSelect" ["stable" "bandwidth" "count"])
+        (assertInt "AdActorSystemPriority")
+        (assertRange "AdActorSystemPriority" 1 65535)
+        (assertInt "AdUserPortKey")
+        (assertRange "AdUserPortKey" 0 1023)
+        (assertValueOneOf "FailOverMACPolicy" ["none" "active" "follow"])
+        (assertValueOneOf "ARPValidate" ["none" "active" "backup" "all"])
+        (assertValueOneOf "ARPAllTargets" ["any" "all"])
+        (assertValueOneOf "PrimaryReselectPolicy" ["always" "better" "failure"])
+        (assertInt "ResendIGMP")
+        (assertRange "ResendIGMP" 0 255)
+        (assertInt "PacketsPerSlave")
+        (assertRange "PacketsPerSlave" 0 65535)
+        (assertInt "GratuitousARP")
+        (assertRange "GratuitousARP" 0 255)
+        (assertValueOneOf "AllSlavesActive" boolValues)
+        (assertValueOneOf "DynamicTransmitLoadBalancing" boolValues)
+        (assertInt "MinLinks")
+        (assertMinimum "MinLinks" 0)
+      ];
 
-  checkXfrm = checkUnitConfig "Xfrm" [
-    (assertOnlyFields [
-      "InterfaceId" "Independent"
-    ])
-    # The following check won't work on nix <= 2.2
-    # see https://github.com/NixOS/nix/pull/2378
-    #
-    # Add this again when we'll have drop the
-    # nix < 2.2 support.
-    # (assertRange "InterfaceId" 1 4294967295)
-    (assertValueOneOf "Independent" boolValues)
-  ];
+      sectionXfrm = checkUnitConfig "Xfrm" [
+        (assertOnlyFields [
+          "InterfaceId"
+          "Independent"
+        ])
+        (assertInt "InterfaceId")
+        (assertRange "InterfaceId" 1 4294967295)
+        (assertValueOneOf "Independent" boolValues)
+      ];
 
-  checkNetwork = checkUnitConfig "Network" [
-    (assertOnlyFields [
-      "Description" "DHCP" "DHCPServer" "LinkLocalAddressing" "IPv4LLRoute"
-      "IPv6Token" "LLMNR" "MulticastDNS" "DNSOverTLS" "DNSSEC"
-      "DNSSECNegativeTrustAnchors" "LLDP" "EmitLLDP" "BindCarrier" "Address"
-      "Gateway" "DNS" "Domains" "NTP" "IPForward" "IPMasquerade"
-      "IPv6PrivacyExtensions" "IPv6AcceptRA" "IPv6DuplicateAddressDetection"
-      "IPv6HopLimit" "IPv4ProxyARP" "IPv6ProxyNDP" "IPv6ProxyNDPAddress"
-      "IPv6PrefixDelegation" "IPv6MTUBytes" "Bridge" "Bond" "VRF" "VLAN"
-      "IPVLAN" "MACVLAN" "VXLAN" "Tunnel" "ActiveSlave" "PrimarySlave"
-      "ConfigureWithoutCarrier" "Xfrm" "KeepConfiguration"
-    ])
-    # Note: For DHCP the values both, none, v4, v6 are deprecated
-    (assertValueOneOf "DHCP" ["yes" "no" "ipv4" "ipv6" "both" "none" "v4" "v6"])
-    (assertValueOneOf "DHCPServer" boolValues)
-    (assertValueOneOf "LinkLocalAddressing" ["yes" "no" "ipv4" "ipv6" "ipv4-fallback" "fallback"])
-    (assertValueOneOf "IPv4LLRoute" boolValues)
-    (assertValueOneOf "LLMNR" ["yes" "resolve" "no"])
-    (assertValueOneOf "MulticastDNS" ["yes" "resolve" "no"])
-    (assertValueOneOf "DNSOverTLS" ["opportunistic" "no"])
-    (assertValueOneOf "DNSSEC" ["yes" "allow-downgrade" "no"])
-    (assertValueOneOf "LLDP" ["yes" "routers-only" "no"])
-    (assertValueOneOf "EmitLLDP" ["yes" "no" "nearest-bridge" "non-tpmr-bridge" "customer-bridge"])
-    (assertValueOneOf "IPForward" ["yes" "no" "ipv4" "ipv6"])
-    (assertValueOneOf "IPMasquerade" boolValues)
-    (assertValueOneOf "IPv6PrivacyExtensions" ["yes" "no" "prefer-public" "kernel"])
-    (assertValueOneOf "IPv6AcceptRA" boolValues)
-    (assertValueOneOf "IPv4ProxyARP" boolValues)
-    (assertValueOneOf "IPv6ProxyNDP" boolValues)
-    (assertValueOneOf "IPv6PrefixDelegation" (boolValues ++ [ "dhcpv6" "static" ]))
-    (assertValueOneOf "ActiveSlave" boolValues)
-    (assertValueOneOf "PrimarySlave" boolValues)
-    (assertValueOneOf "ConfigureWithoutCarrier" boolValues)
-    (assertValueOneOf "KeepConfiguration" (boolValues ++ ["static" "dhcp-on-stop" "dhcp"]))
-  ];
+      sectionVRF = checkUnitConfig "VRF" [
+        (assertOnlyFields [
+          "Table"
+        ])
+        (assertInt "Table")
+        (assertMinimum "Table" 0)
+      ];
+    };
 
-  checkAddress = checkUnitConfig "Address" [
-    (assertOnlyFields [
-      "Address" "Peer" "Broadcast" "Label" "PreferredLifetime" "Scope"
-      "HomeAddress" "DuplicateAddressDetection" "ManageTemporaryAddress"
-      "PrefixRoute" "AutoJoin"
-    ])
-    (assertHasField "Address")
-    (assertValueOneOf "PreferredLifetime" ["forever" "infinity" "0" 0])
-    (assertValueOneOf "HomeAddress" boolValues)
-    (assertValueOneOf "DuplicateAddressDetection" boolValues)
-    (assertValueOneOf "ManageTemporaryAddress" boolValues)
-    (assertValueOneOf "PrefixRoute" boolValues)
-    (assertValueOneOf "AutoJoin" boolValues)
-  ];
+    network = {
+
+      sectionLink = checkUnitConfig "Link" [
+        (assertOnlyFields [
+          "MACAddress"
+          "MTUBytes"
+          "ARP"
+          "Multicast"
+          "AllMulticast"
+          "Unmanaged"
+          "RequiredForOnline"
+        ])
+        (assertMacAddress "MACAddress")
+        (assertByteFormat "MTUBytes")
+        (assertValueOneOf "ARP" boolValues)
+        (assertValueOneOf "Multicast" boolValues)
+        (assertValueOneOf "AllMulticast" boolValues)
+        (assertValueOneOf "Unmanaged" boolValues)
+        (assertValueOneOf "RequiredForOnline" (boolValues ++ [
+          "missing"
+          "off"
+          "no-carrier"
+          "dormant"
+          "degraded-carrier"
+          "carrier"
+          "degraded"
+          "enslaved"
+          "routable"
+        ]))
+      ];
 
-  checkRoutingPolicyRule = checkUnitConfig "RoutingPolicyRule" [
-    (assertOnlyFields [
-      "TypeOfService" "From" "To" "FirewallMark" "Table" "Priority"
-      "IncomingInterface" "OutgoingInterface" "SourcePort" "DestinationPort"
-      "IPProtocol" "InvertRule" "Family"
-    ])
-    (assertRange "TypeOfService" 0 255)
-    # The following check won't work on nix <= 2.2
-    # see https://github.com/NixOS/nix/pull/2378
-    #
-    # Add this again when we'll have drop the
-    # nix < 2.2 support.
-    #  (assertRange "FirewallMark" 1 4294967295)
-    (assertInt "Priority")
-    (assertPort "SourcePort")
-    (assertPort "DestinationPort")
-    (assertValueOneOf "InvertRule" boolValues)
-    (assertValueOneOf "Family" ["ipv4" "ipv6" "both"])
-  ];
+      sectionNetwork = checkUnitConfig "Network" [
+        (assertOnlyFields [
+          "Description"
+          "DHCP"
+          "DHCPServer"
+          "LinkLocalAddressing"
+          "IPv4LLRoute"
+          "DefaultRouteOnDevice"
+          "IPv6Token"
+          "LLMNR"
+          "MulticastDNS"
+          "DNSOverTLS"
+          "DNSSEC"
+          "DNSSECNegativeTrustAnchors"
+          "LLDP"
+          "EmitLLDP"
+          "BindCarrier"
+          "Address"
+          "Gateway"
+          "DNS"
+          "Domains"
+          "DNSDefaultRoute"
+          "NTP"
+          "IPForward"
+          "IPMasquerade"
+          "IPv6PrivacyExtensions"
+          "IPv6AcceptRA"
+          "IPv6DuplicateAddressDetection"
+          "IPv6HopLimit"
+          "IPv4ProxyARP"
+          "IPv6ProxyNDP"
+          "IPv6ProxyNDPAddress"
+          "IPv6PrefixDelegation"
+          "IPv6MTUBytes"
+          "Bridge"
+          "Bond"
+          "VRF"
+          "VLAN"
+          "IPVLAN"
+          "MACVLAN"
+          "VXLAN"
+          "Tunnel"
+          "MACsec"
+          "ActiveSlave"
+          "PrimarySlave"
+          "ConfigureWithoutCarrier"
+          "IgnoreCarrierLoss"
+          "Xfrm"
+          "KeepConfiguration"
+        ])
+        # Note: For DHCP the values both, none, v4, v6 are deprecated
+        (assertValueOneOf "DHCP" ["yes" "no" "ipv4" "ipv6"])
+        (assertValueOneOf "DHCPServer" boolValues)
+        (assertValueOneOf "LinkLocalAddressing" ["yes" "no" "ipv4" "ipv6" "fallback" "ipv4-fallback"])
+        (assertValueOneOf "IPv4LLRoute" boolValues)
+        (assertValueOneOf "DefaultRouteOnDevice" boolValues)
+        (assertValueOneOf "LLMNR" (boolValues ++ ["resolve"]))
+        (assertValueOneOf "MulticastDNS" (boolValues ++ ["resolve"]))
+        (assertValueOneOf "DNSOverTLS" (boolValues ++ ["opportunistic"]))
+        (assertValueOneOf "DNSSEC" (boolValues ++ ["allow-downgrade"]))
+        (assertValueOneOf "LLDP" (boolValues ++ ["routers-only"]))
+        (assertValueOneOf "EmitLLDP" (boolValues ++ ["nearest-bridge" "non-tpmr-bridge" "customer-bridge"]))
+        (assertValueOneOf "DNSDefaultRoute" boolValues)
+        (assertValueOneOf "IPForward" (boolValues ++ ["ipv4" "ipv6"]))
+        (assertValueOneOf "IPMasquerade" boolValues)
+        (assertValueOneOf "IPv6PrivacyExtensions" (boolValues ++ ["prefer-public" "kernel"]))
+        (assertValueOneOf "IPv6AcceptRA" boolValues)
+        (assertInt "IPv6DuplicateAddressDetection")
+        (assertMinimum "IPv6DuplicateAddressDetection" 0)
+        (assertInt "IPv6HopLimit")
+        (assertMinimum "IPv6HopLimit" 0)
+        (assertValueOneOf "IPv4ProxyARP" boolValues)
+        (assertValueOneOf "IPv6ProxyNDP" boolValues)
+        (assertValueOneOf "IPv6PrefixDelegation" ["static" "dhcpv6" "yes" "false"])
+        (assertByteFormat "IPv6MTUBytes")
+        (assertValueOneOf "ActiveSlave" boolValues)
+        (assertValueOneOf "PrimarySlave" boolValues)
+        (assertValueOneOf "ConfigureWithoutCarrier" boolValues)
+        (assertValueOneOf "IgnoreCarrierLoss" boolValues)
+        (assertValueOneOf "KeepConfiguration" (boolValues ++ ["static" "dhcp-on-stop" "dhcp"]))
+      ];
 
-  checkRoute = checkUnitConfig "Route" [
-    (assertOnlyFields [
-      "Gateway" "GatewayOnLink" "Destination" "Source" "Metric"
-      "IPv6Preference" "Scope" "PreferredSource" "Table" "Protocol" "Type"
-      "InitialCongestionWindow" "InitialAdvertisedReceiveWindow" "QuickAck"
-      "MTUBytes"
-    ])
-  ];
+      sectionAddress = checkUnitConfig "Address" [
+        (assertOnlyFields [
+          "Address"
+          "Peer"
+          "Broadcast"
+          "Label"
+          "PreferredLifetime"
+          "Scope"
+          "HomeAddress"
+          "DuplicateAddressDetection"
+          "ManageTemporaryAddress"
+          "AddPrefixRoute"
+          "AutoJoin"
+        ])
+        (assertHasField "Address")
+        (assertValueOneOf "PreferredLifetime" ["forever" "infinity" "0" 0])
+        (assertValueOneOf "HomeAddress" boolValues)
+        (assertValueOneOf "DuplicateAddressDetection" ["ipv4" "ipv6" "both" "none"])
+        (assertValueOneOf "ManageTemporaryAddress" boolValues)
+        (assertValueOneOf "AddPrefixRoute" boolValues)
+        (assertValueOneOf "AutoJoin" boolValues)
+      ];
 
-  checkDhcpV4 = checkUnitConfig "DHCPv4" [
-    (assertOnlyFields [
-      "UseDNS" "RoutesToDNS" "UseNTP" "UseMTU" "Anonymize" "SendHostname" "UseHostname"
-      "Hostname" "UseDomains" "UseRoutes" "UseTimezone"
-      "ClientIdentifier" "VendorClassIdentifier" "UserClass" "MaxAttempts"
-      "DUIDType" "DUIDRawData" "IAID" "RequestBroadcast" "RouteMetric" "RouteTable"
-      "ListenPort" "SendRelease"
-    ])
-    (assertValueOneOf "UseDNS" boolValues)
-    (assertValueOneOf "RoutesToDNS" boolValues)
-    (assertValueOneOf "UseNTP" boolValues)
-    (assertValueOneOf "UseMTU" boolValues)
-    (assertValueOneOf "Anonymize" boolValues)
-    (assertValueOneOf "SendHostname" boolValues)
-    (assertValueOneOf "UseHostname" boolValues)
-    (assertValueOneOf "UseDomains" ["yes" "no" "route"])
-    (assertValueOneOf "UseRoutes" boolValues)
-    (assertValueOneOf "UseTimezone" boolValues)
-    (assertMinimum "MaxAttempts" 0)
-    (assertValueOneOf "RequestBroadcast" boolValues)
-    (assertInt "RouteTable")
-    (assertMinimum "RouteTable" 0)
-    (assertValueOneOf "SendRelease" boolValues)
-  ];
+      sectionRoutingPolicyRule = checkUnitConfig "RoutingPolicyRule" [
+        (assertOnlyFields [
+          "TypeOfService"
+          "From"
+          "To"
+          "FirewallMark"
+          "Table"
+          "Priority"
+          "IncomingInterface"
+          "OutgoingInterface"
+          "SourcePort"
+          "DestinationPort"
+          "IPProtocol"
+          "InvertRule"
+          "Family"
+          "User"
+          "SuppressPrefixLength"
+        ])
+        (assertInt "TypeOfService")
+        (assertRange "TypeOfService" 0 255)
+        (assertInt "FirewallMark")
+        (assertRange "FirewallMark" 1 4294967295)
+        (assertInt "Priority")
+        (assertPort "SourcePort")
+        (assertPort "DestinationPort")
+        (assertValueOneOf "InvertRule" boolValues)
+        (assertValueOneOf "Family" ["ipv4" "ipv6" "both"])
+        (assertInt "SuppressPrefixLength")
+        (assertRange "SuppressPrefixLength" 0 128)
+      ];
 
-  checkDhcpV6 = checkUnitConfig "DHCPv6" [
-    (assertOnlyFields [
-      "UseDns" "UseNTP" "RapidCommit" "ForceDHCPv6PDOtherInformation"
-      "PrefixDelegationHint"
-    ])
-    (assertValueOneOf "UseDNS" boolValues)
-    (assertValueOneOf "UseNTP" boolValues)
-    (assertValueOneOf "RapidCommit" boolValues)
-    (assertValueOneOf "ForceDHCPv6PDOtherInformation" boolValues)
-  ];
+      sectionRoute = checkUnitConfig "Route" [
+        (assertOnlyFields [
+          "Gateway"
+          "GatewayOnLink"
+          "Destination"
+          "Source"
+          "Metric"
+          "IPv6Preference"
+          "Scope"
+          "PreferredSource"
+          "Table"
+          "Protocol"
+          "Type"
+          "InitialCongestionWindow"
+          "InitialAdvertisedReceiveWindow"
+          "QuickAck"
+          "FastOpenNoCookie"
+          "TTLPropagate"
+          "MTUBytes"
+          "IPServiceType"
+          "MultiPathRoute"
+        ])
+        (assertValueOneOf "GatewayOnLink" boolValues)
+        (assertInt "Metric")
+        (assertValueOneOf "IPv6Preference" ["low" "medium" "high"])
+        (assertValueOneOf "Scope" ["global" "site" "link" "host" "nowhere"])
+        (assertValueOneOf "Type" [
+          "unicast"
+          "local"
+          "broadcast"
+          "anycast"
+          "multicast"
+          "blackhole"
+          "unreachable"
+          "prohibit"
+          "throw"
+          "nat"
+          "xresolve"
+        ])
+        (assertValueOneOf "QuickAck" boolValues)
+        (assertValueOneOf "FastOpenNoCookie" boolValues)
+        (assertValueOneOf "TTLPropagate" boolValues)
+        (assertByteFormat "MTUBytes")
+        (assertValueOneOf "IPServiceType" ["CS6" "CS4"])
+      ];
 
-  checkIpv6PrefixDelegation = checkUnitConfig "IPv6PrefixDelegation" [
-    (assertOnlyFields [
-      "Managed"  "OtherInformation"  "RouterLifetimeSec"
-      "RouterPreference"  "EmitDNS"  "DNS"  "EmitDomains"  "Domains"
-      "DNSLifetimeSec"
-    ])
-    (assertValueOneOf "Managed" boolValues)
-    (assertValueOneOf "OtherInformation" boolValues)
-    (assertValueOneOf "RouterPreference" ["high" "medium" "low" "normal" "default"])
-    (assertValueOneOf "EmitDNS" boolValues)
-    (assertValueOneOf "EmitDomains" boolValues)
-    (assertMinimum "DNSLifetimeSec" 0)
-  ];
+      sectionDHCPv4 = checkUnitConfig "DHCPv4" [
+        (assertOnlyFields [
+          "UseDNS"
+          "RoutesToDNS"
+          "UseNTP"
+          "UseSIP"
+          "UseMTU"
+          "Anonymize"
+          "SendHostname"
+          "UseHostname"
+          "Hostname"
+          "UseDomains"
+          "UseRoutes"
+          "UseTimezone"
+          "ClientIdentifier"
+          "VendorClassIdentifier"
+          "UserClass"
+          "MaxAttempts"
+          "DUIDType"
+          "DUIDRawData"
+          "IAID"
+          "RequestBroadcast"
+          "RouteMetric"
+          "RouteTable"
+          "RouteMTUBytes"
+          "ListenPort"
+          "SendRelease"
+          "SendDecline"
+          "BlackList"
+          "RequestOptions"
+          "SendOption"
+        ])
+        (assertValueOneOf "UseDNS" boolValues)
+        (assertValueOneOf "RoutesToDNS" boolValues)
+        (assertValueOneOf "UseNTP" boolValues)
+        (assertValueOneOf "UseSIP" boolValues)
+        (assertValueOneOf "UseMTU" boolValues)
+        (assertValueOneOf "Anonymize" boolValues)
+        (assertValueOneOf "SendHostname" boolValues)
+        (assertValueOneOf "UseHostname" boolValues)
+        (assertValueOneOf "UseDomains" (boolValues ++ ["route"]))
+        (assertValueOneOf "UseRoutes" boolValues)
+        (assertValueOneOf "UseTimezone" boolValues)
+        (assertValueOneOf "ClientIdentifier" ["mac" "duid" "duid-only"])
+        (assertInt "IAID")
+        (assertValueOneOf "RequestBroadcast" boolValues)
+        (assertInt "RouteMetric")
+        (assertInt "RouteTable")
+        (assertRange "RouteTable" 0 4294967295)
+        (assertByteFormat "RouteMTUBytes")
+        (assertPort "ListenPort")
+        (assertValueOneOf "SendRelease" boolValues)
+        (assertValueOneOf "SendDecline" boolValues)
+      ];
 
-  checkIpv6Prefix = checkUnitConfig "IPv6Prefix" [
-    (assertOnlyFields [
-      "AddressAutoconfiguration"  "OnLink"  "Prefix"
-      "PreferredLifetimeSec" "ValidLifetimeSec"
-    ])
-    (assertValueOneOf "AddressAutoconfiguration" boolValues)
-    (assertValueOneOf "OnLink" boolValues)
-    (assertMinimum "PreferredLifetimeSec" 0)
-    (assertMinimum "ValidLifetimeSec" 0)
-  ];
+      sectionDHCPv6 = checkUnitConfig "DHCPv6" [
+        (assertOnlyFields [
+          "UseDNS"
+          "UseNTP"
+          "RapidCommit"
+          "ForceDHCPv6PDOtherInformation"
+          "PrefixDelegationHint"
+        ])
+        (assertValueOneOf "UseDNS" boolValues)
+        (assertValueOneOf "UseNTP" boolValues)
+        (assertValueOneOf "RapidCommit" boolValues)
+        (assertValueOneOf "ForceDHCPv6PDOtherInformation" boolValues)
+      ];
 
+      sectionDHCPServer = checkUnitConfig "DHCPServer" [
+        (assertOnlyFields [
+          "PoolOffset"
+          "PoolSize"
+          "DefaultLeaseTimeSec"
+          "MaxLeaseTimeSec"
+          "EmitDNS"
+          "DNS"
+          "EmitNTP"
+          "NTP"
+          "EmitSIP"
+          "SIP"
+          "EmitRouter"
+          "EmitTimezone"
+          "Timezone"
+          "SendOption"
+        ])
+        (assertInt "PoolOffset")
+        (assertMinimum "PoolOffset" 0)
+        (assertInt "PoolSize")
+        (assertMinimum "PoolSize" 0)
+        (assertValueOneOf "EmitDNS" boolValues)
+        (assertValueOneOf "EmitNTP" boolValues)
+        (assertValueOneOf "EmitSIP" boolValues)
+        (assertValueOneOf "EmitRouter" boolValues)
+        (assertValueOneOf "EmitTimezone" boolValues)
+      ];
 
-  checkDhcpServer = checkUnitConfig "DHCPServer" [
-    (assertOnlyFields [
-      "PoolOffset" "PoolSize" "DefaultLeaseTimeSec" "MaxLeaseTimeSec"
-      "EmitDNS" "DNS" "EmitNTP" "NTP" "EmitRouter" "EmitTimezone" "Timezone"
-    ])
-    (assertValueOneOf "EmitDNS" boolValues)
-    (assertValueOneOf "EmitNTP" boolValues)
-    (assertValueOneOf "EmitRouter" boolValues)
-    (assertValueOneOf "EmitTimezone" boolValues)
-  ];
+      sectionIPv6PrefixDelegation = checkUnitConfig "IPv6PrefixDelegation" [
+        (assertOnlyFields [
+          "Managed"
+          "OtherInformation"
+          "RouterLifetimeSec"
+          "RouterPreference"
+          "EmitDNS"
+          "DNS"
+          "EmitDomains"
+          "Domains"
+          "DNSLifetimeSec"
+        ])
+        (assertValueOneOf "Managed" boolValues)
+        (assertValueOneOf "OtherInformation" boolValues)
+        (assertValueOneOf "RouterPreference" ["high" "medium" "low" "normal" "default"])
+        (assertValueOneOf "EmitDNS" boolValues)
+        (assertValueOneOf "EmitDomains" boolValues)
+      ];
 
-  # .network files have a [Link] section with different options than in .netlink files
-  checkNetworkLink = checkUnitConfig "Link" [
-    (assertOnlyFields [
-      "MACAddress" "MTUBytes" "ARP" "Multicast" "Unmanaged" "RequiredForOnline"
-    ])
-    (assertMacAddress "MACAddress")
-    (assertByteFormat "MTUBytes")
-    (assertValueOneOf "ARP" boolValues)
-    (assertValueOneOf "Multicast" boolValues)
-    (assertValueOneOf "Unmanaged" boolValues)
-    (assertValueOneOf "RequiredForOnline" (boolValues ++ ["off" "no-carrier" "dormant" "degraded-carrier" "carrier" "degraded" "enslaved" "routable"]))
-  ];
+      sectionIPv6Prefix = checkUnitConfig "IPv6Prefix" [
+        (assertOnlyFields [
+          "AddressAutoconfiguration"
+          "OnLink"
+          "Prefix"
+          "PreferredLifetimeSec"
+          "ValidLifetimeSec"
+        ])
+        (assertValueOneOf "AddressAutoconfiguration" boolValues)
+        (assertValueOneOf "OnLink" boolValues)
+      ];
 
+    };
+  };
 
   commonNetworkOptions = {
 
@@ -406,7 +761,7 @@ let
     linkConfig = mkOption {
       default = {};
       example = { MACAddress = "00:ff:ee:aa:cc:dd"; };
-      type = types.addCheck (types.attrsOf unitOption) checkLink;
+      type = types.addCheck (types.attrsOf unitOption) check.link.sectionLink;
       description = ''
         Each attribute in this set specifies an option in the
         <literal>[Link]</literal> section of the unit.  See
@@ -417,12 +772,28 @@ let
 
   };
 
+  wireguardPeerOptions = {
+    options = {
+      wireguardPeerConfig = mkOption {
+        default = {};
+        example = { };
+        type = types.addCheck (types.attrsOf unitOption) check.netdev.sectionWireGuardPeer;
+        description = ''
+          Each attribute in this set specifies an option in the
+          <literal>[WireGuardPeer]</literal> section of the unit.  See
+          <citerefentry><refentrytitle>systemd.network</refentrytitle>
+          <manvolnum>5</manvolnum></citerefentry> for details.
+        '';
+      };
+    };
+  };
+
   netdevOptions = commonNetworkOptions // {
 
     netdevConfig = mkOption {
       default = {};
       example = { Name = "mybridge"; Kind = "bridge"; };
-      type = types.addCheck (types.attrsOf unitOption) checkNetdev;
+      type = types.addCheck (types.attrsOf unitOption) check.netdev.sectionNetdev;
       description = ''
         Each attribute in this set specifies an option in the
         <literal>[Netdev]</literal> section of the unit.  See
@@ -431,65 +802,10 @@ let
       '';
     };
 
-    vrfConfig = mkOption {
-      default = {};
-      example = { Table = 2342; };
-      type = types.addCheck (types.attrsOf unitOption) checkVRF;
-      description = ''
-        Each attribute in this set specifies an option in the
-        <literal>[VRF]</literal> section of the unit. See
-        <citerefentry><refentrytitle>systemd.netdev</refentrytitle>
-        <manvolnum>5</manvolnum></citerefentry> for details.
-        A detailed explanation about how VRFs work can be found in the
-        <link xlink:href="https://www.kernel.org/doc/Documentation/networking/vrf.txt">kernel
-        docs</link>.
-      '';
-    };
-
-    wireguardConfig = mkOption {
-      default = {};
-      example = {
-        PrivateKeyFile = "/etc/wireguard/secret.key";
-        ListenPort = 51820;
-        FwMark = 42;
-      };
-      type = types.addCheck (types.attrsOf unitOption) checkWireGuard;
-      description = ''
-        Each attribute in this set specifies an option in the
-        <literal>[WireGuard]</literal> section of the unit. See
-        <citerefentry><refentrytitle>systemd.netdev</refentrytitle>
-        <manvolnum>5</manvolnum></citerefentry> for details.
-        Use <literal>PrivateKeyFile</literal> instead of
-        <literal>PrivateKey</literal>: the nix store is
-        world-readable.
-      '';
-    };
-
-    wireguardPeers = mkOption {
-      default = [];
-      example = [ { wireguardPeerConfig={
-        Endpoint = "192.168.1.1:51820";
-        PublicKey = "27s0OvaBBdHoJYkH9osZpjpgSOVNw+RaKfboT/Sfq0g=";
-        PresharedKeyFile = "/etc/wireguard/psk.key";
-        AllowedIPs = [ "10.0.0.1/32" ];
-        PersistentKeepalive = 15;
-      };}];
-      type = with types; listOf (submodule wireguardPeerOptions);
-      description = ''
-        Each item in this array specifies an option in the
-        <literal>[WireGuardPeer]</literal> section of the unit. See
-        <citerefentry><refentrytitle>systemd.netdev</refentrytitle>
-        <manvolnum>5</manvolnum></citerefentry> for details.
-        Use <literal>PresharedKeyFile</literal> instead of
-        <literal>PresharedKey</literal>: the nix store is
-        world-readable.
-      '';
-    };
-
     vlanConfig = mkOption {
       default = {};
-      example = { Id = "4"; };
-      type = types.addCheck (types.attrsOf unitOption) checkVlan;
+      example = { Id = 4; };
+      type = types.addCheck (types.attrsOf unitOption) check.netdev.sectionVLAN;
       description = ''
         Each attribute in this set specifies an option in the
         <literal>[VLAN]</literal> section of the unit.  See
@@ -501,7 +817,7 @@ let
     macvlanConfig = mkOption {
       default = {};
       example = { Mode = "private"; };
-      type = types.addCheck (types.attrsOf unitOption) checkMacvlan;
+      type = types.addCheck (types.attrsOf unitOption) check.netdev.sectionMACVLAN;
       description = ''
         Each attribute in this set specifies an option in the
         <literal>[MACVLAN]</literal> section of the unit.  See
@@ -513,7 +829,7 @@ let
     vxlanConfig = mkOption {
       default = {};
       example = { Id = "4"; };
-      type = types.addCheck (types.attrsOf unitOption) checkVxlan;
+      type = types.addCheck (types.attrsOf unitOption) check.netdev.sectionVXLAN;
       description = ''
         Each attribute in this set specifies an option in the
         <literal>[VXLAN]</literal> section of the unit.  See
@@ -525,7 +841,7 @@ let
     tunnelConfig = mkOption {
       default = {};
       example = { Remote = "192.168.1.1"; };
-      type = types.addCheck (types.attrsOf unitOption) checkTunnel;
+      type = types.addCheck (types.attrsOf unitOption) check.netdev.sectionTunnel;
       description = ''
         Each attribute in this set specifies an option in the
         <literal>[Tunnel]</literal> section of the unit.  See
@@ -537,7 +853,7 @@ let
     peerConfig = mkOption {
       default = {};
       example = { Name = "veth2"; };
-      type = types.addCheck (types.attrsOf unitOption) checkPeer;
+      type = types.addCheck (types.attrsOf unitOption) check.netdev.sectionPeer;
       description = ''
         Each attribute in this set specifies an option in the
         <literal>[Peer]</literal> section of the unit.  See
@@ -549,7 +865,7 @@ let
     tunConfig = mkOption {
       default = {};
       example = { User = "openvpn"; };
-      type = types.addCheck (types.attrsOf unitOption) checkTun;
+      type = types.addCheck (types.attrsOf unitOption) check.netdev.sectionTun;
       description = ''
         Each attribute in this set specifies an option in the
         <literal>[Tun]</literal> section of the unit.  See
@@ -561,7 +877,7 @@ let
     tapConfig = mkOption {
       default = {};
       example = { User = "openvpn"; };
-      type = types.addCheck (types.attrsOf unitOption) checkTap;
+      type = types.addCheck (types.attrsOf unitOption) check.netdev.sectionTap;
       description = ''
         Each attribute in this set specifies an option in the
         <literal>[Tap]</literal> section of the unit.  See
@@ -570,10 +886,50 @@ let
       '';
     };
 
+    wireguardConfig = mkOption {
+      default = {};
+      example = {
+        PrivateKeyFile = "/etc/wireguard/secret.key";
+        ListenPort = 51820;
+        FwMark = 42;
+      };
+      type = types.addCheck (types.attrsOf unitOption) check.netdev.sectionWireGuard;
+      description = ''
+        Each attribute in this set specifies an option in the
+        <literal>[WireGuard]</literal> section of the unit. See
+        <citerefentry><refentrytitle>systemd.netdev</refentrytitle>
+        <manvolnum>5</manvolnum></citerefentry> for details.
+        Use <literal>PrivateKeyFile</literal> instead of
+        <literal>PrivateKey</literal>: the nix store is
+        world-readable.
+      '';
+    };
+
+    wireguardPeers = mkOption {
+      default = [];
+      example = [ { wireguardPeerConfig={
+        Endpoint = "192.168.1.1:51820";
+        PublicKey = "27s0OvaBBdHoJYkH9osZpjpgSOVNw+RaKfboT/Sfq0g=";
+        PresharedKeyFile = "/etc/wireguard/psk.key";
+        AllowedIPs = [ "10.0.0.1/32" ];
+        PersistentKeepalive = 15;
+      };}];
+      type = with types; listOf (submodule wireguardPeerOptions);
+      description = ''
+        Each item in this array specifies an option in the
+        <literal>[WireGuardPeer]</literal> section of the unit. See
+        <citerefentry><refentrytitle>systemd.netdev</refentrytitle>
+        <manvolnum>5</manvolnum></citerefentry> for details.
+        Use <literal>PresharedKeyFile</literal> instead of
+        <literal>PresharedKey</literal>: the nix store is
+        world-readable.
+      '';
+    };
+
     bondConfig = mkOption {
       default = {};
       example = { Mode = "802.3ad"; };
-      type = types.addCheck (types.attrsOf unitOption) checkBond;
+      type = types.addCheck (types.attrsOf unitOption) check.netdev.sectionBond;
       description = ''
         Each attribute in this set specifies an option in the
         <literal>[Bond]</literal> section of the unit.  See
@@ -585,7 +941,7 @@ let
     xfrmConfig = mkOption {
       default = {};
       example = { InterfaceId = 1; };
-      type = types.addCheck (types.attrsOf unitOption) checkXfrm;
+      type = types.addCheck (types.attrsOf unitOption) check.netdev.sectionXfrm;
       description = ''
         Each attribute in this set specifies an option in the
         <literal>[Xfrm]</literal> section of the unit.  See
@@ -594,6 +950,21 @@ let
       '';
     };
 
+    vrfConfig = mkOption {
+      default = {};
+      example = { Table = 2342; };
+      type = types.addCheck (types.attrsOf unitOption) check.netdev.sectionVRF;
+      description = ''
+        Each attribute in this set specifies an option in the
+        <literal>[VRF]</literal> section of the unit. See
+        <citerefentry><refentrytitle>systemd.netdev</refentrytitle>
+        <manvolnum>5</manvolnum></citerefentry> for details.
+        A detailed explanation about how VRFs work can be found in the
+        <link xlink:href="https://www.kernel.org/doc/Documentation/networking/vrf.txt">kernel
+        docs</link>.
+      '';
+    };
+
   };
 
   addressOptions = {
@@ -601,7 +972,7 @@ let
       addressConfig = mkOption {
         default = {};
         example = { Address = "192.168.0.100/24"; };
-        type = types.addCheck (types.attrsOf unitOption) checkAddress;
+        type = types.addCheck (types.attrsOf unitOption) check.network.sectionAddress;
         description = ''
           Each attribute in this set specifies an option in the
           <literal>[Address]</literal> section of the unit.  See
@@ -617,7 +988,7 @@ let
       routingPolicyRuleConfig = mkOption {
         default = { };
         example = { routingPolicyRuleConfig = { Table = 10; IncomingInterface = "eth1"; Family = "both"; } ;};
-        type = types.addCheck (types.attrsOf unitOption) checkRoutingPolicyRule;
+        type = types.addCheck (types.attrsOf unitOption) check.network.sectionRoutingPolicyRule;
         description = ''
           Each attribute in this set specifies an option in the
           <literal>[RoutingPolicyRule]</literal> section of the unit.  See
@@ -633,7 +1004,7 @@ let
       routeConfig = mkOption {
         default = {};
         example = { Gateway = "192.168.0.1"; };
-        type = types.addCheck (types.attrsOf unitOption) checkRoute;
+        type = types.addCheck (types.attrsOf unitOption) check.network.sectionRoute;
         description = ''
           Each attribute in this set specifies an option in the
           <literal>[Route]</literal> section of the unit.  See
@@ -644,28 +1015,12 @@ let
     };
   };
 
-  wireguardPeerOptions = {
-    options = {
-      wireguardPeerConfig = mkOption {
-        default = {};
-        example = { };
-        type = types.addCheck (types.attrsOf unitOption) checkWireGuardPeer;
-        description = ''
-          Each attribute in this set specifies an option in the
-          <literal>[WireGuardPeer]</literal> section of the unit.  See
-          <citerefentry><refentrytitle>systemd.network</refentrytitle>
-          <manvolnum>5</manvolnum></citerefentry> for details.
-        '';
-      };
-    };
-  };
-
   ipv6PrefixOptions = {
     options = {
       ipv6PrefixConfig = mkOption {
         default = {};
         example = { Prefix = "fd00::/64"; };
-        type = types.addCheck (types.attrsOf unitOption) checkIpv6Prefix;
+        type = types.addCheck (types.attrsOf unitOption) check.network.sectionIPv6Prefix;
         description = ''
           Each attribute in this set specifies an option in the
           <literal>[IPv6Prefix]</literal> section of the unit.  See
@@ -676,13 +1031,24 @@ let
     };
   };
 
-
   networkOptions = commonNetworkOptions // {
 
+    linkConfig = mkOption {
+      default = {};
+      example = { Unmanaged = true; };
+      type = types.addCheck (types.attrsOf unitOption) check.network.sectionLink;
+      description = ''
+        Each attribute in this set specifies an option in the
+        <literal>[Link]</literal> section of the unit.  See
+        <citerefentry><refentrytitle>systemd.network</refentrytitle>
+        <manvolnum>5</manvolnum></citerefentry> for details.
+      '';
+    };
+
     networkConfig = mkOption {
       default = {};
       example = { Description = "My Network"; };
-      type = types.addCheck (types.attrsOf unitOption) checkNetwork;
+      type = types.addCheck (types.attrsOf unitOption) check.network.sectionNetwork;
       description = ''
         Each attribute in this set specifies an option in the
         <literal>[Network]</literal> section of the unit.  See
@@ -701,7 +1067,7 @@ let
     dhcpV4Config = mkOption {
       default = {};
       example = { UseDNS = true; UseRoutes = true; };
-      type = types.addCheck (types.attrsOf unitOption) checkDhcpV4;
+      type = types.addCheck (types.attrsOf unitOption) check.network.sectionDHCPv4;
       description = ''
         Each attribute in this set specifies an option in the
         <literal>[DHCPv4]</literal> section of the unit.  See
@@ -713,7 +1079,7 @@ let
     dhcpV6Config = mkOption {
       default = {};
       example = { UseDNS = true; UseRoutes = true; };
-      type = types.addCheck (types.attrsOf unitOption) checkDhcpV6;
+      type = types.addCheck (types.attrsOf unitOption) check.network.sectionDHCPv6;
       description = ''
         Each attribute in this set specifies an option in the
         <literal>[DHCPv6]</literal> section of the unit.  See
@@ -722,48 +1088,36 @@ let
       '';
     };
 
-    ipv6PrefixDelegationConfig = mkOption {
+    dhcpServerConfig = mkOption {
       default = {};
-      example = { EmitDNS = true; Managed = true; OtherInformation = true; };
-      type = types.addCheck (types.attrsOf unitOption) checkIpv6PrefixDelegation;
+      example = { PoolOffset = 50; EmitDNS = false; };
+      type = types.addCheck (types.attrsOf unitOption) check.network.sectionDHCPServer;
       description = ''
         Each attribute in this set specifies an option in the
-        <literal>[IPv6PrefixDelegation]</literal> section of the unit.  See
-        <citerefentry><refentrytitle>systemd.network</refentrytitle>
-        <manvolnum>5</manvolnum></citerefentry> for details.
-      '';
-    };
-
-    ipv6Prefixes = mkOption {
-      default = [];
-      example = { AddressAutoconfiguration = true; OnLink = true; };
-      type = with types; listOf (submodule ipv6PrefixOptions);
-      description = ''
-        A list of ipv6Prefix sections to be added to the unit.  See
+        <literal>[DHCPServer]</literal> section of the unit.  See
         <citerefentry><refentrytitle>systemd.network</refentrytitle>
         <manvolnum>5</manvolnum></citerefentry> for details.
       '';
     };
 
-    dhcpServerConfig = mkOption {
+    ipv6PrefixDelegationConfig = mkOption {
       default = {};
-      example = { PoolOffset = 50; EmitDNS = false; };
-      type = types.addCheck (types.attrsOf unitOption) checkDhcpServer;
+      example = { EmitDNS = true; Managed = true; OtherInformation = true; };
+      type = types.addCheck (types.attrsOf unitOption) check.network.sectionIPv6PrefixDelegation;
       description = ''
         Each attribute in this set specifies an option in the
-        <literal>[DHCPServer]</literal> section of the unit.  See
+        <literal>[IPv6PrefixDelegation]</literal> section of the unit.  See
         <citerefentry><refentrytitle>systemd.network</refentrytitle>
         <manvolnum>5</manvolnum></citerefentry> for details.
       '';
     };
 
-    linkConfig = mkOption {
-      default = {};
-      example = { Unmanaged = true; };
-      type = types.addCheck (types.attrsOf unitOption) checkNetworkLink;
+    ipv6Prefixes = mkOption {
+      default = [];
+      example = { AddressAutoconfiguration = true; OnLink = true; };
+      type = with types; listOf (submodule ipv6PrefixOptions);
       description = ''
-        Each attribute in this set specifies an option in the
-        <literal>[Link]</literal> section of the unit.  See
+        A list of ipv6Prefix sections to be added to the unit.  See
         <citerefentry><refentrytitle>systemd.network</refentrytitle>
         <manvolnum>5</manvolnum></citerefentry> for details.
       '';
@@ -958,160 +1312,162 @@ let
     };
   };
 
-  commonMatchText = def: optionalString (def.matchConfig != {}) ''
+  commonMatchText = def: optionalString (def.matchConfig != { }) ''
     [Match]
     ${attrsToSection def.matchConfig}
   '';
 
   linkToUnit = name: def:
     { inherit (def) enable;
-      text = commonMatchText def +
-        ''
+      text = commonMatchText def
+        + ''
           [Link]
           ${attrsToSection def.linkConfig}
-
-          ${def.extraConfig}
-        '';
+        ''
+        + def.extraConfig;
     };
 
   netdevToUnit = name: def:
     { inherit (def) enable;
-      text = commonMatchText def +
-        ''
+      text = commonMatchText def
+        + ''
           [NetDev]
           ${attrsToSection def.netdevConfig}
-
-          ${optionalString (def.vlanConfig != { }) ''
-            [VLAN]
-            ${attrsToSection def.vlanConfig}
-
-          ''}
-          ${optionalString (def.macvlanConfig != { }) ''
-            [MACVLAN]
-            ${attrsToSection def.macvlanConfig}
-
-          ''}
-          ${optionalString (def.vxlanConfig != { }) ''
-            [VXLAN]
-            ${attrsToSection def.vxlanConfig}
-
-          ''}
-          ${optionalString (def.tunnelConfig != { }) ''
-            [Tunnel]
-            ${attrsToSection def.tunnelConfig}
-
-          ''}
-          ${optionalString (def.peerConfig != { }) ''
-            [Peer]
-            ${attrsToSection def.peerConfig}
-
-          ''}
-          ${optionalString (def.tunConfig != { }) ''
-            [Tun]
-            ${attrsToSection def.tunConfig}
-
-          ''}
-          ${optionalString (def.tapConfig != { }) ''
-            [Tap]
-            ${attrsToSection def.tapConfig}
-
-          ''}
-          ${optionalString (def.bondConfig != { }) ''
-            [Bond]
-            ${attrsToSection def.bondConfig}
-
-          ''}
-          ${optionalString (def.xfrmConfig != { }) ''
-            [Xfrm]
-            ${attrsToSection def.xfrmConfig}
-
-          ''}
-          ${optionalString (def.vrfConfig != { }) ''
-            [VRF]
-            ${attrsToSection def.vrfConfig}
-
-          ''}
-          ${optionalString (def.wireguardConfig != { }) ''
-            [WireGuard]
-            ${attrsToSection def.wireguardConfig}
-
-          ''}
-          ${flip concatMapStrings def.wireguardPeers (x: ''
-            [WireGuardPeer]
-            ${attrsToSection x.wireguardPeerConfig}
-
-          '')}
-          ${def.extraConfig}
-        '';
+        ''
+        + optionalString (def.vlanConfig != { }) ''
+          [VLAN]
+          ${attrsToSection def.vlanConfig}
+        ''
+        + optionalString (def.macvlanConfig != { }) ''
+          [MACVLAN]
+          ${attrsToSection def.macvlanConfig}
+        ''
+        + optionalString (def.vxlanConfig != { }) ''
+          [VXLAN]
+          ${attrsToSection def.vxlanConfig}
+        ''
+        + optionalString (def.tunnelConfig != { }) ''
+          [Tunnel]
+          ${attrsToSection def.tunnelConfig}
+        ''
+        + optionalString (def.peerConfig != { }) ''
+          [Peer]
+          ${attrsToSection def.peerConfig}
+        ''
+        + optionalString (def.tunConfig != { }) ''
+          [Tun]
+          ${attrsToSection def.tunConfig}
+        ''
+        + optionalString (def.tapConfig != { }) ''
+          [Tap]
+          ${attrsToSection def.tapConfig}
+        ''
+        + optionalString (def.wireguardConfig != { }) ''
+          [WireGuard]
+          ${attrsToSection def.wireguardConfig}
+        ''
+        + flip concatMapStrings def.wireguardPeers (x: ''
+          [WireGuardPeer]
+          ${attrsToSection x.wireguardPeerConfig}
+        '')
+        + optionalString (def.bondConfig != { }) ''
+          [Bond]
+          ${attrsToSection def.bondConfig}
+        ''
+        + optionalString (def.xfrmConfig != { }) ''
+          [Xfrm]
+          ${attrsToSection def.xfrmConfig}
+        ''
+        + optionalString (def.vrfConfig != { }) ''
+          [VRF]
+          ${attrsToSection def.vrfConfig}
+        ''
+        + def.extraConfig;
     };
 
   networkToUnit = name: def:
     { inherit (def) enable;
-      text = commonMatchText def +
+      text = commonMatchText def
+        + optionalString (def.linkConfig != { }) ''
+          [Link]
+          ${attrsToSection def.linkConfig}
         ''
-          ${optionalString (def.linkConfig != { }) ''
-            [Link]
-            ${attrsToSection def.linkConfig}
-
-          ''}
-
+        + ''
           [Network]
-          ${attrsToSection def.networkConfig}
+        ''
+        + attrsToSection def.networkConfig
+        + optionalString (def.address != [ ]) ''
           ${concatStringsSep "\n" (map (s: "Address=${s}") def.address)}
+        ''
+        + optionalString (def.gateway != [ ]) ''
           ${concatStringsSep "\n" (map (s: "Gateway=${s}") def.gateway)}
+        ''
+        + optionalString (def.dns != [ ]) ''
           ${concatStringsSep "\n" (map (s: "DNS=${s}") def.dns)}
+        ''
+        + optionalString (def.ntp != [ ]) ''
           ${concatStringsSep "\n" (map (s: "NTP=${s}") def.ntp)}
+        ''
+        + optionalString (def.bridge != [ ]) ''
           ${concatStringsSep "\n" (map (s: "Bridge=${s}") def.bridge)}
+        ''
+        + optionalString (def.bond != [ ]) ''
           ${concatStringsSep "\n" (map (s: "Bond=${s}") def.bond)}
+        ''
+        + optionalString (def.vrf != [ ]) ''
           ${concatStringsSep "\n" (map (s: "VRF=${s}") def.vrf)}
+        ''
+        + optionalString (def.vlan != [ ]) ''
           ${concatStringsSep "\n" (map (s: "VLAN=${s}") def.vlan)}
+        ''
+        + optionalString (def.macvlan != [ ]) ''
           ${concatStringsSep "\n" (map (s: "MACVLAN=${s}") def.macvlan)}
+        ''
+        + optionalString (def.vxlan != [ ]) ''
           ${concatStringsSep "\n" (map (s: "VXLAN=${s}") def.vxlan)}
+        ''
+        + optionalString (def.tunnel != [ ]) ''
           ${concatStringsSep "\n" (map (s: "Tunnel=${s}") def.tunnel)}
+        ''
+        + optionalString (def.xfrm != [ ]) ''
           ${concatStringsSep "\n" (map (s: "Xfrm=${s}") def.xfrm)}
+        ''
+        + ''
 
-          ${optionalString (def.dhcpV4Config != { }) ''
-            [DHCPv4]
-            ${attrsToSection def.dhcpV4Config}
-
-          ''}
-          ${optionalString (def.dhcpV6Config != {}) ''
-            [DHCPv6]
-            ${attrsToSection def.dhcpV6Config}
-
-          ''}
-          ${optionalString (def.ipv6PrefixDelegationConfig != {}) ''
-            [IPv6PrefixDelegation]
-            ${attrsToSection def.ipv6PrefixDelegationConfig}
-
-          ''}
-          ${flip concatMapStrings def.ipv6Prefixes (x: ''
-            [IPv6Prefix]
-            ${attrsToSection x.ipv6PrefixConfig}
-
-          '')}
-          ${optionalString (def.dhcpServerConfig != { }) ''
-            [DHCPServer]
-            ${attrsToSection def.dhcpServerConfig}
-
-          ''}
-          ${flip concatMapStrings def.addresses (x: ''
-            [Address]
-            ${attrsToSection x.addressConfig}
-
-          '')}
-          ${flip concatMapStrings def.routes (x: ''
-            [Route]
-            ${attrsToSection x.routeConfig}
-
-          '')}
-          ${flip concatMapStrings def.routingPolicyRules (x: ''
-            [RoutingPolicyRule]
-            ${attrsToSection x.routingPolicyRuleConfig}
-
-          '')}
-          ${def.extraConfig}
-        '';
+        ''
+        + flip concatMapStrings def.addresses (x: ''
+          [Address]
+          ${attrsToSection x.addressConfig}
+        '')
+        + flip concatMapStrings def.routingPolicyRules (x: ''
+          [RoutingPolicyRule]
+          ${attrsToSection x.routingPolicyRuleConfig}
+        '')
+        + flip concatMapStrings def.routes (x: ''
+          [Route]
+          ${attrsToSection x.routeConfig}
+        '')
+        + optionalString (def.dhcpV4Config != { }) ''
+          [DHCPv4]
+          ${attrsToSection def.dhcpV4Config}
+        ''
+        + optionalString (def.dhcpV6Config != { }) ''
+          [DHCPv6]
+          ${attrsToSection def.dhcpV6Config}
+        ''
+        + optionalString (def.dhcpServerConfig != { }) ''
+          [DHCPServer]
+          ${attrsToSection def.dhcpServerConfig}
+        ''
+        + optionalString (def.ipv6PrefixDelegationConfig != { }) ''
+          [IPv6PrefixDelegation]
+          ${attrsToSection def.ipv6PrefixDelegationConfig}
+        ''
+        + flip concatMapStrings def.ipv6Prefixes (x: ''
+          [IPv6Prefix]
+          ${attrsToSection x.ipv6PrefixConfig}
+        '')
+        + def.extraConfig;
     };
 
   unitFiles = listToAttrs (map (name: {
diff --git a/nixpkgs/nixos/modules/system/boot/plymouth.nix b/nixpkgs/nixos/modules/system/boot/plymouth.nix
index 23fce22366d8..55e5b07ed615 100644
--- a/nixpkgs/nixos/modules/system/boot/plymouth.nix
+++ b/nixpkgs/nixos/modules/system/boot/plymouth.nix
@@ -102,6 +102,8 @@ in
     systemd.services.plymouth-poweroff.wantedBy = [ "poweroff.target" ];
     systemd.services.plymouth-reboot.wantedBy = [ "reboot.target" ];
     systemd.services.plymouth-read-write.wantedBy = [ "sysinit.target" ];
+    systemd.services.systemd-ask-password-plymouth.wantedBy = ["multi-user.target"];
+    systemd.paths.systemd-ask-password-plymouth.wantedBy = ["multi-user.target"];
 
     boot.initrd.extraUtilsCommands = ''
       copy_bin_and_libs ${pkgs.plymouth}/bin/plymouthd
@@ -146,6 +148,7 @@ in
     # We use `mkAfter` to ensure that LUKS password prompt would be shown earlier than the splash screen.
     boot.initrd.preLVMCommands = mkAfter ''
       mkdir -p /etc/plymouth
+      mkdir -p /run/plymouth
       ln -s ${configFile} /etc/plymouth/plymouthd.conf
       ln -s $extraUtils/share/plymouth/plymouthd.defaults /etc/plymouth/plymouthd.defaults
       ln -s $extraUtils/share/plymouth/logo.png /etc/plymouth/logo.png
diff --git a/nixpkgs/nixos/modules/system/boot/stage-1-init.sh b/nixpkgs/nixos/modules/system/boot/stage-1-init.sh
index 607aec87f01e..f7c2940049e5 100644
--- a/nixpkgs/nixos/modules/system/boot/stage-1-init.sh
+++ b/nixpkgs/nixos/modules/system/boot/stage-1-init.sh
@@ -144,6 +144,14 @@ for o in $(cat /proc/cmdline); do
             set -- $(IFS==; echo $o)
             stage2Init=$2
             ;;
+        boot.persistence=*)
+            set -- $(IFS==; echo $o)
+            persistence=$2
+            ;;
+        boot.persistence.opt=*)
+            set -- $(IFS==; echo $o)
+            persistence_opt=$2
+            ;;
         boot.trace|debugtrace)
             # Show each command.
             set -x
@@ -210,6 +218,7 @@ done
 # Create device nodes in /dev.
 @preDeviceCommands@
 echo "running udev..."
+ln -sfn /proc/self/fd /dev/fd
 mkdir -p /etc/systemd
 ln -sfn @linkUnits@ /etc/systemd/network
 mkdir -p /etc/udev
@@ -370,12 +379,14 @@ mountFS() {
 
     mkdir -p "/mnt-root$mountPoint"
 
-    # For CIFS mounts, retry a few times before giving up.
+    # For ZFS and CIFS mounts, retry a few times before giving up.
+    # We do this for ZFS as a workaround for issue NixOS/nixpkgs#25383.
     local n=0
     while true; do
         mount "/mnt-root$mountPoint" && break
-        if [ "$fsType" != cifs -o "$n" -ge 10 ]; then fail; break; fi
+        if [ \( "$fsType" != cifs -a "$fsType" != zfs \) -o "$n" -ge 10 ]; then fail; break; fi
         echo "retrying..."
+        sleep 1
         n=$((n + 1))
     done
 
@@ -534,6 +545,14 @@ while read -u 3 mountPoint; do
       continue
     fi
 
+    if [ "$mountPoint" = / ] && [ "$device" = tmpfs ] && [ ! -z "$persistence" ]; then
+        echo persistence...
+        waitDevice "$persistence"
+        echo enabling persistence...
+        mountFS "$persistence" "$mountPoint" "$persistence_opt" "auto"
+        continue
+    fi
+
     mountFS "$device" "$mountPoint" "$options" "$fsType"
 done
 
diff --git a/nixpkgs/nixos/modules/system/boot/stage-1.nix b/nixpkgs/nixos/modules/system/boot/stage-1.nix
index d551466f52eb..6823e12847c2 100644
--- a/nixpkgs/nixos/modules/system/boot/stage-1.nix
+++ b/nixpkgs/nixos/modules/system/boot/stage-1.nix
@@ -36,7 +36,7 @@ let
     set -euo pipefail
 
     declare -A seen
-    declare -a left
+    left=()
 
     patchelf="${pkgs.buildPackages.patchelf}/bin/patchelf"
 
@@ -48,7 +48,7 @@ let
       done
     }
 
-    add_needed $1
+    add_needed "$1"
 
     while [ ''${#left[@]} -ne 0 ]; do
       next=''${left[0]}
@@ -111,20 +111,21 @@ let
       copy_bin_and_libs ${pkgs.utillinux}/sbin/blkid
 
       # Copy dmsetup and lvm.
-      copy_bin_and_libs ${pkgs.lvm2}/sbin/dmsetup
-      copy_bin_and_libs ${pkgs.lvm2}/sbin/lvm
+      copy_bin_and_libs ${getBin pkgs.lvm2}/bin/dmsetup
+      copy_bin_and_libs ${getBin pkgs.lvm2}/bin/lvm
 
       # Add RAID mdadm tool.
       copy_bin_and_libs ${pkgs.mdadm}/sbin/mdadm
       copy_bin_and_libs ${pkgs.mdadm}/sbin/mdmon
 
       # Copy udev.
-      copy_bin_and_libs ${udev}/lib/systemd/systemd-udevd
-      copy_bin_and_libs ${udev}/lib/systemd/systemd-sysctl
       copy_bin_and_libs ${udev}/bin/udevadm
+      copy_bin_and_libs ${udev}/lib/systemd/systemd-sysctl
       for BIN in ${udev}/lib/udev/*_id; do
         copy_bin_and_libs $BIN
       done
+      # systemd-udevd is only a symlink to udevadm these days
+      ln -sf udevadm $out/bin/systemd-udevd
 
       # Copy modprobe.
       copy_bin_and_libs ${pkgs.kmod}/bin/kmod
@@ -235,7 +236,7 @@ let
             --replace cdrom_id ${extraUtils}/bin/cdrom_id \
             --replace ${pkgs.coreutils}/bin/basename ${extraUtils}/bin/basename \
             --replace ${pkgs.utillinux}/bin/blkid ${extraUtils}/bin/blkid \
-            --replace ${pkgs.lvm2}/sbin ${extraUtils}/bin \
+            --replace ${getBin pkgs.lvm2}/bin ${extraUtils}/bin \
             --replace ${pkgs.mdadm}/sbin ${extraUtils}/sbin \
             --replace ${pkgs.bash}/bin/sh ${extraUtils}/bin/sh \
             --replace ${udev} ${extraUtils}
@@ -374,7 +375,8 @@ let
           ) config.boot.initrd.secrets)
          }
 
-        (cd "$tmp" && find . | cpio -H newc -o) | gzip >>"$1"
+        (cd "$tmp" && find . -print0 | sort -z | cpio -o -H newc -R +0:+0 --reproducible --null) | \
+          ${config.boot.initrd.compressor} >> "$1"
       '';
 
 in
@@ -554,15 +556,17 @@ in
       };
 
     fileSystems = mkOption {
-      type = with lib.types; loaOf (submodule {
+      type = with lib.types; attrsOf (submodule {
         options.neededForBoot = mkOption {
           default = false;
           type = types.bool;
           description = ''
-            If set, this file system will be mounted in the initial
-            ramdisk.  By default, this applies to the root file system
-            and to the file system containing
-            <filename>/nix/store</filename>.
+            If set, this file system will be mounted in the initial ramdisk.
+            Note that the file system will always be mounted in the initial
+            ramdisk if its mount point is one of the following:
+            ${concatStringsSep ", " (
+              forEach utils.pathsNeededForBoot (i: "<filename>${i}</filename>")
+            )}.
           '';
         };
       });
diff --git a/nixpkgs/nixos/modules/system/boot/stage-2-init.sh b/nixpkgs/nixos/modules/system/boot/stage-2-init.sh
index d1de7920df98..936077b9df1e 100644
--- a/nixpkgs/nixos/modules/system/boot/stage-2-init.sh
+++ b/nixpkgs/nixos/modules/system/boot/stage-2-init.sh
@@ -169,4 +169,4 @@ exec {logOutFd}>&- {logErrFd}>&-
 echo "starting systemd..."
 PATH=/run/current-system/systemd/lib/systemd:@fsPackagesPath@ \
     LOCALE_ARCHIVE=/run/current-system/sw/lib/locale/locale-archive \
-    exec systemd
+    exec @systemdExecutable@
diff --git a/nixpkgs/nixos/modules/system/boot/stage-2.nix b/nixpkgs/nixos/modules/system/boot/stage-2.nix
index 6b0b47227301..dd6d83ee0094 100644
--- a/nixpkgs/nixos/modules/system/boot/stage-2.nix
+++ b/nixpkgs/nixos/modules/system/boot/stage-2.nix
@@ -10,6 +10,7 @@ let
     src = ./stage-2-init.sh;
     shellDebug = "${pkgs.bashInteractive}/bin/bash";
     shell = "${pkgs.bash}/bin/bash";
+    inherit (config.boot) systemdExecutable;
     isExecutable = true;
     inherit (config.nix) readOnlyStore;
     inherit useHostResolvConf;
@@ -72,6 +73,15 @@ in
         '';
       };
 
+      systemdExecutable = mkOption {
+        default = "systemd";
+        type = types.str;
+        description = ''
+          The program to execute to start systemd. Typically
+          <literal>systemd</literal>, which will find systemd in the
+          PATH.
+        '';
+      };
     };
 
   };
diff --git a/nixpkgs/nixos/modules/system/boot/systemd-nspawn.nix b/nixpkgs/nixos/modules/system/boot/systemd-nspawn.nix
index 06ea5ee49f72..b450d77429b2 100644
--- a/nixpkgs/nixos/modules/system/boot/systemd-nspawn.nix
+++ b/nixpkgs/nixos/modules/system/boot/systemd-nspawn.nix
@@ -113,9 +113,9 @@ in {
   config =
     let
       units = mapAttrs' (n: v: let nspawnFile = "${n}.nspawn"; in nameValuePair nspawnFile (instanceToUnit nspawnFile v)) cfg;
-    in 
+    in
       mkMerge [
-        (mkIf (cfg != {}) { 
+        (mkIf (cfg != {}) {
           environment.etc."systemd/nspawn".source = mkIf (cfg != {}) (generateUnits' false "nspawn" units [] []);
         })
         {
@@ -123,7 +123,7 @@ in {
 
           # Workaround for https://github.com/NixOS/nixpkgs/pull/67232#issuecomment-531315437 and https://github.com/systemd/systemd/issues/13622
           # Once systemd fixes this upstream, we can re-enable -U
-          systemd.services."systemd-nspawn@".serviceConfig.ExecStart = [ 
+          systemd.services."systemd-nspawn@".serviceConfig.ExecStart = [
             ""  # deliberately empty. signals systemd to override the ExecStart
             # Only difference between upstream is that we do not pass the -U flag
             "${config.systemd.package}/bin/systemd-nspawn --quiet --keep-unit --boot --link-journal=try-guest --network-veth --settings=override --machine=%i"
diff --git a/nixpkgs/nixos/modules/system/boot/systemd-unit-options.nix b/nixpkgs/nixos/modules/system/boot/systemd-unit-options.nix
index bee21f1a8f36..5addc6f9ca44 100644
--- a/nixpkgs/nixos/modules/system/boot/systemd-unit-options.nix
+++ b/nixpkgs/nixos/modules/system/boot/systemd-unit-options.nix
@@ -233,7 +233,7 @@ in rec {
 
     path = mkOption {
       default = [];
-      apply = ps: "${makeBinPath ps}:${makeSearchPathOutput "bin" "sbin" ps}";
+      type = with types; listOf (oneOf [ package str ]);
       description = ''
         Packages added to the service's <envar>PATH</envar>
         environment variable.  Both the <filename>bin</filename>
@@ -378,6 +378,16 @@ in rec {
       '';
     };
 
+    listenDatagrams = mkOption {
+      default = [];
+      type = types.listOf types.str;
+      example = [ "0.0.0.0:993" "/run/my-socket" ];
+      description = ''
+        For each item in this list, a <literal>ListenDatagram</literal>
+        option in the <literal>[Socket]</literal> section will be created.
+      '';
+    };
+
     socketConfig = mkOption {
       default = {};
       example = { ListenStream = "/run/my-socket"; };
diff --git a/nixpkgs/nixos/modules/system/boot/systemd.nix b/nixpkgs/nixos/modules/system/boot/systemd.nix
index f613edde0217..12a4e996fcae 100644
--- a/nixpkgs/nixos/modules/system/boot/systemd.nix
+++ b/nixpkgs/nixos/modules/system/boot/systemd.nix
@@ -25,7 +25,7 @@ let
       "nss-lookup.target"
       "nss-user-lookup.target"
       "time-sync.target"
-      #"cryptsetup.target"
+      "cryptsetup.target"
       "sigpwr.target"
       "timers.target"
       "paths.target"
@@ -73,7 +73,7 @@ let
       "systemd-journald.service"
       "systemd-journal-flush.service"
       "systemd-journal-catalog-update.service"
-      "systemd-journald-audit.socket"
+      ] ++ (optional (!config.boot.isContainer) "systemd-journald-audit.socket") ++ [
       "systemd-journald-dev-log.socket"
       "syslog.socket"
 
@@ -81,10 +81,6 @@ let
       "systemd-coredump.socket"
       "systemd-coredump@.service"
 
-      # SysV init compatibility.
-      "systemd-initctl.socket"
-      "systemd-initctl.service"
-
       # Kernel module loading.
       "systemd-modules-load.service"
       "kmod-static-nodes.service"
@@ -101,7 +97,7 @@ let
       "dev-hugepages.mount"
       "dev-mqueue.mount"
       "sys-fs-fuse-connections.mount"
-      "sys-kernel-config.mount"
+      ] ++ (optional (!config.boot.isContainer) "sys-kernel-config.mount") ++ [
       "sys-kernel-debug.mount"
 
       # Maintaining state across reboots.
@@ -261,7 +257,7 @@ let
               pkgs.gnused
               systemd
             ];
-          environment.PATH = config.path;
+          environment.PATH = "${makeBinPath config.path}:${makeSearchPathOutput "bin" "sbin" config.path}";
         }
         (mkIf (config.preStart != "")
           { serviceConfig.ExecStartPre =
@@ -354,6 +350,7 @@ let
           [Socket]
           ${attrsToSection def.socketConfig}
           ${concatStringsSep "\n" (map (s: "ListenStream=${s}") def.listenStreams)}
+          ${concatStringsSep "\n" (map (s: "ListenDatagram=${s}") def.listenDatagrams)}
         '';
     };
 
@@ -749,6 +746,25 @@ in
       '';
     };
 
+    systemd.tmpfiles.packages = mkOption {
+      type = types.listOf types.package;
+      default = [];
+      example = literalExample "[ pkgs.lvm2 ]";
+      apply = map getLib;
+      description = ''
+        List of packages containing <command>systemd-tmpfiles</command> rules.
+
+        All files ending in .conf found in
+        <filename><replaceable>pkg</replaceable>/lib/tmpfiles.d</filename>
+        will be included.
+        If this folder does not exist or does not contain any files an error will be returned instead.
+
+        If a <filename>lib</filename> output is available, rules are searched there and only there.
+        If there is no <filename>lib</filename> output it will fall back to <filename>out</filename>
+        and if that does not exist either, the default output will be used.
+      '';
+    };
+
     systemd.user.units = mkOption {
       description = "Definition of systemd per-user units.";
       default = {};
@@ -818,6 +834,49 @@ in
       '';
     };
 
+    systemd.watchdog.device = mkOption {
+      type = types.nullOr types.path;
+      default = null;
+      example = "/dev/watchdog";
+      description = ''
+        The path to a hardware watchdog device which will be managed by systemd.
+        If not specified, systemd will default to /dev/watchdog.
+      '';
+    };
+
+    systemd.watchdog.runtimeTime = mkOption {
+      type = types.nullOr types.str;
+      default = null;
+      example = "30s";
+      description = ''
+        The amount of time which can elapse before a watchdog hardware device
+        will automatically reboot the system. Valid time units include "ms",
+        "s", "min", "h", "d", and "w".
+      '';
+    };
+
+    systemd.watchdog.rebootTime = mkOption {
+      type = types.nullOr types.str;
+      default = null;
+      example = "10m";
+      description = ''
+        The amount of time which can elapse after a reboot has been triggered
+        before a watchdog hardware device will automatically reboot the system.
+        Valid time units include "ms", "s", "min", "h", "d", and "w".
+      '';
+    };
+
+    systemd.watchdog.kexecTime = mkOption {
+      type = types.nullOr types.str;
+      default = null;
+      example = "10m";
+      description = ''
+        The amount of time which can elapse when kexec is being executed before
+        a watchdog hardware device will automatically reboot the system. This
+        option should only be enabled if reloadTime is also enabled. Valid
+        time units include "ms", "s", "min", "h", "d", and "w".
+      '';
+    };
   };
 
 
@@ -844,11 +903,9 @@ in
       )
       ]);
       passwd = (mkMerge [
-        [ "mymachines" ]
         (mkAfter [ "systemd" ])
       ]);
       group = (mkMerge [
-        [ "mymachines" ]
         (mkAfter [ "systemd" ])
       ]);
     };
@@ -889,6 +946,19 @@ in
           DefaultIPAccounting=yes
         ''}
         DefaultLimitCORE=infinity
+        ${optionalString (config.systemd.watchdog.device != null) ''
+          WatchdogDevice=${config.systemd.watchdog.device}
+        ''}
+        ${optionalString (config.systemd.watchdog.runtimeTime != null) ''
+          RuntimeWatchdogSec=${config.systemd.watchdog.runtimeTime}
+        ''}
+        ${optionalString (config.systemd.watchdog.rebootTime != null) ''
+          RebootWatchdogSec=${config.systemd.watchdog.rebootTime}
+        ''}
+        ${optionalString (config.systemd.watchdog.kexecTime != null) ''
+          KExecWatchdogSec=${config.systemd.watchdog.kexecTime}
+        ''}
+
         ${config.systemd.extraConfig}
       '';
 
@@ -936,27 +1006,20 @@ in
       "sysctl.d/50-coredump.conf".source = "${systemd}/example/sysctl.d/50-coredump.conf";
       "sysctl.d/50-default.conf".source = "${systemd}/example/sysctl.d/50-default.conf";
 
-      "tmpfiles.d/00-nixos.conf".text = ''
-        # This file is created automatically and should not be modified.
-        # Please change the option ‘systemd.tmpfiles.rules’ instead.
-
-        ${concatStringsSep "\n" cfg.tmpfiles.rules}
-      '';
-
-      # home.conf creates /srv (which we don't want), and /home, which
-      # is handled by NixOS anyway.
-      # "tmpfiles.d/home.conf".source = "${systemd}/example/tmpfiles.d/home.conf";
-
-      "tmpfiles.d/journal-nocow.conf".source = "${systemd}/example/tmpfiles.d/journal-nocow.conf";
-      "tmpfiles.d/portables.conf".source = "${systemd}/example/tmpfiles.d/portables.conf";
-      "tmpfiles.d/static-nodes-permissions.conf".source = "${systemd}/example/tmpfiles.d/static-nodes-permissions.conf";
-      "tmpfiles.d/systemd.conf".source = "${systemd}/example/tmpfiles.d/systemd.conf";
-      "tmpfiles.d/systemd-nologin.conf".source = "${systemd}/example/tmpfiles.d/systemd-nologin.conf";
-      "tmpfiles.d/systemd-nspawn.conf".source = "${systemd}/example/tmpfiles.d/systemd-nspawn.conf";
-      "tmpfiles.d/systemd-tmp.conf".source = "${systemd}/example/tmpfiles.d/systemd-tmp.conf";
-      "tmpfiles.d/tmp.conf".source = "${systemd}/example/tmpfiles.d/tmp.conf";
-      "tmpfiles.d/var.conf".source = "${systemd}/example/tmpfiles.d/var.conf";
-      "tmpfiles.d/x11.conf".source = "${systemd}/example/tmpfiles.d/x11.conf";
+      "tmpfiles.d".source = (pkgs.symlinkJoin {
+        name = "tmpfiles.d";
+        paths = map (p: p + "/lib/tmpfiles.d") cfg.tmpfiles.packages;
+        postBuild = ''
+          for i in $(cat $pathsPath); do
+            (test -d "$i" && test $(ls "$i"/*.conf | wc -l) -ge 1) || (
+              echo "ERROR: The path '$i' from systemd.tmpfiles.packages contains no *.conf files."
+              exit 1
+            )
+          done
+        '' + concatMapStrings (name: optionalString (hasPrefix "tmpfiles.d/" name) ''
+          rm -f $out/${removePrefix "tmpfiles.d/" name}
+        '') config.system.build.etc.targets;
+      }) + "/*";
 
       "systemd/system-generators" = { source = hooks "generators" cfg.generators; };
       "systemd/system-shutdown" = { source = hooks "shutdown" cfg.shutdown; };
@@ -977,6 +1040,38 @@ in
         unitConfig.X-StopOnReconfiguration = true;
       };
 
+    systemd.tmpfiles.packages = [
+      # Default tmpfiles rules provided by systemd
+      (pkgs.runCommand "systemd-default-tmpfiles" {} ''
+        mkdir -p $out/lib/tmpfiles.d
+        cd $out/lib/tmpfiles.d
+
+        # home.conf creates /srv (which we don't want), and /home, which
+        # is handled by NixOS anyway.
+        # ln -s "${systemd}/example/tmpfiles.d/home.conf"
+        ln -s "${systemd}/example/tmpfiles.d/journal-nocow.conf"
+        ln -s "${systemd}/example/tmpfiles.d/static-nodes-permissions.conf"
+        ln -s "${systemd}/example/tmpfiles.d/systemd.conf"
+        ln -s "${systemd}/example/tmpfiles.d/systemd-nologin.conf"
+        ln -s "${systemd}/example/tmpfiles.d/systemd-nspawn.conf"
+        ln -s "${systemd}/example/tmpfiles.d/systemd-tmp.conf"
+        ln -s "${systemd}/example/tmpfiles.d/tmp.conf"
+        ln -s "${systemd}/example/tmpfiles.d/var.conf"
+        ln -s "${systemd}/example/tmpfiles.d/x11.conf"
+      '')
+      # User-specified tmpfiles rules
+      (pkgs.writeTextFile {
+        name = "nixos-tmpfiles.d";
+        destination = "/lib/tmpfiles.d/00-nixos.conf";
+        text = ''
+          # This file is created automatically and should not be modified.
+          # Please change the option ‘systemd.tmpfiles.rules’ instead.
+
+          ${concatStringsSep "\n" cfg.tmpfiles.rules}
+        '';
+      })
+    ];
+
     systemd.units =
          mapAttrs' (n: v: nameValuePair "${n}.path"    (pathToUnit    n v)) cfg.paths
       // mapAttrs' (n: v: nameValuePair "${n}.service" (serviceToUnit n v)) cfg.services
diff --git a/nixpkgs/nixos/modules/system/boot/tmp.nix b/nixpkgs/nixos/modules/system/boot/tmp.nix
index 5bf5e2eb2ec5..26eb172210e7 100644
--- a/nixpkgs/nixos/modules/system/boot/tmp.nix
+++ b/nixpkgs/nixos/modules/system/boot/tmp.nix
@@ -36,4 +36,4 @@ with lib;
 
   };
 
-}
\ No newline at end of file
+}
diff --git a/nixpkgs/nixos/modules/system/etc/etc.nix b/nixpkgs/nixos/modules/system/etc/etc.nix
index 1f4d54a1ae20..7478e3e80717 100644
--- a/nixpkgs/nixos/modules/system/etc/etc.nix
+++ b/nixpkgs/nixos/modules/system/etc/etc.nix
@@ -46,7 +46,7 @@ in
         Set of files that have to be linked in <filename>/etc</filename>.
       '';
 
-      type = with types; loaOf (submodule (
+      type = with types; attrsOf (submodule (
         { name, config, ... }:
         { options = {
 
diff --git a/nixpkgs/nixos/modules/system/etc/make-etc.sh b/nixpkgs/nixos/modules/system/etc/make-etc.sh
index 1ca4c3046f0e..aabfb5e88a65 100644
--- a/nixpkgs/nixos/modules/system/etc/make-etc.sh
+++ b/nixpkgs/nixos/modules/system/etc/make-etc.sh
@@ -23,7 +23,7 @@ for ((i = 0; i < ${#targets_[@]}; i++)); do
         done
 
     else
-        
+
         mkdir -p $out/etc/$(dirname $target)
         if ! [ -e $out/etc/$target ]; then
             ln -s $source $out/etc/$target
@@ -34,13 +34,12 @@ for ((i = 0; i < ${#targets_[@]}; i++)); do
                 exit 1
             fi
         fi
-        
+
         if test "${modes_[$i]}" != symlink; then
             echo "${modes_[$i]}"  > $out/etc/$target.mode
             echo "${users_[$i]}"  > $out/etc/$target.uid
             echo "${groups_[$i]}" > $out/etc/$target.gid
         fi
-        
+
     fi
 done
-
diff --git a/nixpkgs/nixos/modules/tasks/auto-upgrade.nix b/nixpkgs/nixos/modules/tasks/auto-upgrade.nix
index e70004e643e1..69385e5f2fe0 100644
--- a/nixpkgs/nixos/modules/tasks/auto-upgrade.nix
+++ b/nixpkgs/nixos/modules/tasks/auto-upgrade.nix
@@ -2,9 +2,9 @@
 
 with lib;
 
-let cfg = config.system.autoUpgrade; in
+let cfg = config.system.autoUpgrade;
 
-{
+in {
 
   options = {
 
@@ -21,6 +21,16 @@ let cfg = config.system.autoUpgrade; in
         '';
       };
 
+      flake = mkOption {
+        type = types.nullOr types.str;
+        default = null;
+        example = "github:kloenk/nix";
+        description = ''
+          The Flake URI of the NixOS configuration to build.
+          Disables the option <option>system.autoUpgrade.channel</option>.
+        '';
+      };
+
       channel = mkOption {
         type = types.nullOr types.str;
         default = null;
@@ -35,10 +45,20 @@ let cfg = config.system.autoUpgrade; in
 
       flags = mkOption {
         type = types.listOf types.str;
-        default = [];
-        example = [ "-I" "stuff=/home/alice/nixos-stuff" "--option" "extra-binary-caches" "http://my-cache.example.org/" ];
+        default = [ ];
+        example = [
+          "-I"
+          "stuff=/home/alice/nixos-stuff"
+          "--option"
+          "extra-binary-caches"
+          "http://my-cache.example.org/"
+        ];
         description = ''
           Any additional flags passed to <command>nixos-rebuild</command>.
+
+          If you are using flakes and use a local repo you can add
+          <command>[ "--update-input" "nixpkgs" "--commit-lock-file" ]</command>
+          to update nixpkgs.
         '';
       };
 
@@ -82,11 +102,23 @@ let cfg = config.system.autoUpgrade; in
 
   config = lib.mkIf cfg.enable {
 
-    system.autoUpgrade.flags =
-      [ "--no-build-output" ]
-      ++ (if cfg.channel == null
-          then [ "--upgrade" ]
-          else [ "-I" "nixpkgs=${cfg.channel}/nixexprs.tar.xz" ]);
+    assertions = [{
+      assertion = !((cfg.channel != null) && (cfg.flake != null));
+      message = ''
+        The options 'system.autoUpgrade.channels' and 'system.autoUpgrade.flake' cannot both be set.
+      '';
+    }];
+
+    system.autoUpgrade.flags = [ "--no-build-output" ]
+      ++ (if cfg.flake == null then
+        (if cfg.channel == null then
+          [ "--upgrade" ]
+        else [
+          "-I"
+          "nixpkgs=${cfg.channel}/nixexprs.tar.xz"
+        ])
+      else
+        [ "--flake ${cfg.flake}" ]);
 
     systemd.services.nixos-upgrade = {
       description = "NixOS Upgrade";
@@ -96,33 +128,41 @@ let cfg = config.system.autoUpgrade; in
 
       serviceConfig.Type = "oneshot";
 
-      environment = config.nix.envVars //
-        { inherit (config.environment.sessionVariables) NIX_PATH;
-          HOME = "/root";
-        } // config.networking.proxy.envVars;
+      environment = config.nix.envVars // {
+        inherit (config.environment.sessionVariables) NIX_PATH;
+        HOME = "/root";
+      } // config.networking.proxy.envVars;
 
-      path = with pkgs; [ coreutils gnutar xz.bin gzip gitMinimal config.nix.package.out ];
+      path = with pkgs; [
+        coreutils
+        gnutar
+        xz.bin
+        gzip
+        gitMinimal
+        config.nix.package.out
+      ];
 
       script = let
-          nixos-rebuild = "${config.system.build.nixos-rebuild}/bin/nixos-rebuild";
-        in
-        if cfg.allowReboot then ''
-            ${nixos-rebuild} boot ${toString cfg.flags}
-            booted="$(readlink /run/booted-system/{initrd,kernel,kernel-modules})"
-            built="$(readlink /nix/var/nix/profiles/system/{initrd,kernel,kernel-modules})"
-            if [ "$booted" = "$built" ]; then
-              ${nixos-rebuild} switch ${toString cfg.flags}
-            else
-              /run/current-system/sw/bin/shutdown -r +1
-            fi
-          '' else ''
-            ${nixos-rebuild} switch ${toString cfg.flags}
-        '';
+        nixos-rebuild =
+          "${config.system.build.nixos-rebuild}/bin/nixos-rebuild";
+      in if cfg.allowReboot then ''
+        ${nixos-rebuild} boot ${toString cfg.flags}
+        booted="$(readlink /run/booted-system/{initrd,kernel,kernel-modules})"
+        built="$(readlink /nix/var/nix/profiles/system/{initrd,kernel,kernel-modules})"
+        if [ "$booted" = "$built" ]; then
+          ${nixos-rebuild} switch ${toString cfg.flags}
+        else
+          /run/current-system/sw/bin/shutdown -r +1
+        fi
+      '' else ''
+        ${nixos-rebuild} switch ${toString cfg.flags}
+      '';
 
       startAt = cfg.dates;
     };
 
-    systemd.timers.nixos-upgrade.timerConfig.RandomizedDelaySec = cfg.randomizedDelaySec;
+    systemd.timers.nixos-upgrade.timerConfig.RandomizedDelaySec =
+      cfg.randomizedDelaySec;
 
   };
 
diff --git a/nixpkgs/nixos/modules/tasks/bcache.nix b/nixpkgs/nixos/modules/tasks/bcache.nix
index 8bab91c721fd..41fb7664f3d1 100644
--- a/nixpkgs/nixos/modules/tasks/bcache.nix
+++ b/nixpkgs/nixos/modules/tasks/bcache.nix
@@ -8,6 +8,6 @@
 
   boot.initrd.extraUdevRulesCommands = ''
     cp -v ${pkgs.bcache-tools}/lib/udev/rules.d/*.rules $out/
-  ''; 
+  '';
 
 }
diff --git a/nixpkgs/nixos/modules/tasks/encrypted-devices.nix b/nixpkgs/nixos/modules/tasks/encrypted-devices.nix
index bc0933f16fec..dd337de98698 100644
--- a/nixpkgs/nixos/modules/tasks/encrypted-devices.nix
+++ b/nixpkgs/nixos/modules/tasks/encrypted-devices.nix
@@ -37,7 +37,14 @@ let
         default = null;
         example = "/mnt-root/root/.swapkey";
         type = types.nullOr types.str;
-        description = "File system location of keyfile. This unlocks the drive after the root has been mounted to <literal>/mnt-root</literal>.";
+        description = ''
+          Path to a keyfile used to unlock the backing encrypted
+          device. At the time this keyfile is accessed, the
+          <literal>neededForBoot</literal> filesystems (see
+          <literal>fileSystems.&lt;name?&gt;.neededForBoot</literal>)
+          will have been mounted under <literal>/mnt-root</literal>,
+          so the keyfile path should usually start with "/mnt-root/".
+        '';
       };
     };
   };
@@ -47,7 +54,7 @@ in
 
   options = {
     fileSystems = mkOption {
-      type = with lib.types; loaOf (submodule encryptedFSOptions);
+      type = with lib.types; attrsOf (submodule encryptedFSOptions);
     };
     swapDevices = mkOption {
       type = with lib.types; listOf (submodule encryptedFSOptions);
@@ -65,12 +72,16 @@ in
     boot.initrd = {
       luks = {
         devices =
-          builtins.listToAttrs (map (dev: { name = dev.encrypted.label; value = { device = dev.encrypted.blkDev; }; }) keylessEncDevs);
+          builtins.listToAttrs (map (dev: {
+            name = dev.encrypted.label;
+            value = { device = dev.encrypted.blkDev; };
+          }) keylessEncDevs);
         forceLuksSupportInInitrd = true;
       };
       postMountCommands =
-        concatMapStrings (dev: "cryptsetup luksOpen --key-file ${dev.encrypted.keyFile} ${dev.encrypted.blkDev} ${dev.encrypted.label};\n") keyedEncDevs;
+        concatMapStrings (dev:
+          "cryptsetup luksOpen --key-file ${dev.encrypted.keyFile} ${dev.encrypted.blkDev} ${dev.encrypted.label};\n"
+        ) keyedEncDevs;
     };
   };
 }
-
diff --git a/nixpkgs/nixos/modules/tasks/filesystems.nix b/nixpkgs/nixos/modules/tasks/filesystems.nix
index 0ade74b957a0..3ea67dac7146 100644
--- a/nixpkgs/nixos/modules/tasks/filesystems.nix
+++ b/nixpkgs/nixos/modules/tasks/filesystems.nix
@@ -159,7 +159,7 @@ in
           "/bigdisk".label = "bigdisk";
         }
       '';
-      type = types.loaOf (types.submodule [coreFileSystemOpts fileSystemOpts]);
+      type = types.attrsOf (types.submodule [coreFileSystemOpts fileSystemOpts]);
       description = ''
         The file systems to be mounted.  It must include an entry for
         the root directory (<literal>mountPoint = "/"</literal>).  Each
@@ -193,7 +193,7 @@ in
 
     boot.specialFileSystems = mkOption {
       default = {};
-      type = types.loaOf (types.submodule coreFileSystemOpts);
+      type = types.attrsOf (types.submodule coreFileSystemOpts);
       internal = true;
       description = ''
         Special filesystems that are mounted very early during boot.
diff --git a/nixpkgs/nixos/modules/tasks/filesystems/btrfs.nix b/nixpkgs/nixos/modules/tasks/filesystems/btrfs.nix
index f64493e1a3c7..c0ff28039b16 100644
--- a/nixpkgs/nixos/modules/tasks/filesystems/btrfs.nix
+++ b/nixpkgs/nixos/modules/tasks/filesystems/btrfs.nix
@@ -128,7 +128,10 @@ in
             Nice = 19;
             IOSchedulingClass = "idle";
             ExecStart = "${pkgs.btrfs-progs}/bin/btrfs scrub start -B ${fs}";
-            ExecStop  = "${pkgs.btrfs-progs}/bin/btrfs scrub cancel ${fs}";
+            # if the service is stopped before scrub end, cancel it
+            ExecStop  = pkgs.writeShellScript "btrfs-scrub-maybe-cancel" ''
+              (${pkgs.btrfs-progs}/bin/btrfs scrub status ${fs} | ${pkgs.gnugrep}/bin/grep finished) || ${pkgs.btrfs-progs}/bin/btrfs scrub cancel ${fs}
+            '';
           };
         };
       in listToAttrs (map scrubService cfgScrub.fileSystems);
diff --git a/nixpkgs/nixos/modules/tasks/filesystems/zfs.nix b/nixpkgs/nixos/modules/tasks/filesystems/zfs.nix
index 71eed4d6f1a4..9ca7c6fb3431 100644
--- a/nixpkgs/nixos/modules/tasks/filesystems/zfs.nix
+++ b/nixpkgs/nixos/modules/tasks/filesystems/zfs.nix
@@ -191,15 +191,14 @@ in
       };
 
       requestEncryptionCredentials = mkOption {
-        type = types.bool;
+        type = types.either types.bool (types.listOf types.str);
         default = true;
+        example = [ "tank" "data" ];
         description = ''
-          Request encryption keys or passwords for all encrypted datasets on import.
-          For root pools the encryption key can be supplied via both an
-          interactive prompt (keylocation=prompt) and from a file
-          (keylocation=file://). Note that for data pools the encryption key can
-          be only loaded from a file and not via interactive prompt since the
-          import is processed in a background systemd service.
+          If true on import encryption keys or passwords for all encrypted datasets
+          are requested. To only decrypt selected datasets supply a list of dataset
+          names instead. For root pools the encryption key can be supplied via both
+          an interactive prompt (keylocation=prompt) and from a file (keylocation=file://).
         '';
       };
 
@@ -421,9 +420,13 @@ in
               fi
               poolImported "${pool}" || poolImport "${pool}"  # Try one last time, e.g. to import a degraded pool.
             fi
-            ${lib.optionalString cfgZfs.requestEncryptionCredentials ''
-              zfs load-key -a
-            ''}
+            ${if isBool cfgZfs.requestEncryptionCredentials
+              then optionalString cfgZfs.requestEncryptionCredentials ''
+                zfs load-key -a
+              ''
+              else concatMapStrings (fs: ''
+                zfs load-key ${fs}
+              '') cfgZfs.requestEncryptionCredentials}
         '') rootPools));
       };
 
@@ -490,7 +493,11 @@ in
             description = "Import ZFS pool \"${pool}\"";
             # we need systemd-udev-settle until https://github.com/zfsonlinux/zfs/pull/4943 is merged
             requires = [ "systemd-udev-settle.service" ];
-            after = [ "systemd-udev-settle.service" "systemd-modules-load.service" ];
+            after = [
+              "systemd-udev-settle.service"
+              "systemd-modules-load.service"
+              "systemd-ask-password-console.service"
+            ];
             wantedBy = (getPoolMounts pool) ++ [ "local-fs.target" ];
             before = (getPoolMounts pool) ++ [ "local-fs.target" ];
             unitConfig = {
@@ -515,7 +522,27 @@ in
               done
               poolImported "${pool}" || poolImport "${pool}"  # Try one last time, e.g. to import a degraded pool.
               if poolImported "${pool}"; then
-                ${optionalString cfgZfs.requestEncryptionCredentials "\"${packages.zfsUser}/sbin/zfs\" load-key -r \"${pool}\""}
+                ${optionalString (if isBool cfgZfs.requestEncryptionCredentials
+                                  then cfgZfs.requestEncryptionCredentials
+                                  else cfgZfs.requestEncryptionCredentials != []) ''
+                  ${packages.zfsUser}/sbin/zfs list -rHo name,keylocation ${pool} | while IFS=$'\t' read ds kl; do
+                    (${optionalString (!isBool cfgZfs.requestEncryptionCredentials) ''
+                         if ! echo '${concatStringsSep "\n" cfgZfs.requestEncryptionCredentials}' | grep -qFx "$ds"; then
+                           continue
+                         fi
+                       ''}
+                    case "$kl" in
+                      none )
+                        ;;
+                      prompt )
+                        ${config.systemd.package}/bin/systemd-ask-password "Enter key for $ds:" | ${packages.zfsUser}/sbin/zfs load-key "$ds"
+                        ;;
+                      * )
+                        ${packages.zfsUser}/sbin/zfs load-key "$ds"
+                        ;;
+                    esac) < /dev/null # To protect while read ds kl in case anything reads stdin
+                  done
+                ''}
                 echo "Successfully imported ${pool}"
               else
                 exit 1
diff --git a/nixpkgs/nixos/modules/tasks/lvm.nix b/nixpkgs/nixos/modules/tasks/lvm.nix
index d56a8a2f63a8..2c3cc4c5467d 100644
--- a/nixpkgs/nixos/modules/tasks/lvm.nix
+++ b/nixpkgs/nixos/modules/tasks/lvm.nix
@@ -1,17 +1,70 @@
 { config, lib, pkgs, ... }:
 
 with lib;
+let
+  cfg = config.services.lvm;
+in {
+  options.services.lvm = {
+    package = mkOption {
+      type = types.package;
+      default = if cfg.dmeventd.enable then pkgs.lvm2_dmeventd else pkgs.lvm2;
+      internal = true;
+      defaultText = "pkgs.lvm2";
+      description = ''
+        This option allows you to override the LVM package that's used on the system
+        (udev rules, tmpfiles, systemd services).
+        Defaults to pkgs.lvm2, or pkgs.lvm2_dmeventd if dmeventd is enabled.
+      '';
+    };
+    dmeventd.enable = mkEnableOption "the LVM dmevent daemon";
+    boot.thin.enable = mkEnableOption "support for booting from ThinLVs";
+  };
 
-{
-
-  ###### implementation
+  config = mkMerge [
+    (mkIf (!config.boot.isContainer) {
+      systemd.tmpfiles.packages = [ cfg.package.out ];
+      environment.systemPackages = [ cfg.package ];
+      systemd.packages = [ cfg.package ];
 
-  config = mkIf (!config.boot.isContainer) {
+      # TODO: update once https://github.com/NixOS/nixpkgs/pull/93006 was merged
+      services.udev.packages = [ cfg.package.out ];
+    })
+    (mkIf cfg.dmeventd.enable {
+      systemd.sockets."dm-event".wantedBy = [ "sockets.target" ];
+      systemd.services."lvm2-monitor".wantedBy = [ "sysinit.target" ];
 
-    environment.systemPackages = [ pkgs.lvm2 ];
+      environment.etc."lvm/lvm.conf".text = ''
+        dmeventd/executable = "${cfg.package}/bin/dmeventd"
+      '';
+    })
+    (mkIf cfg.boot.thin.enable {
+      boot.initrd = {
+        kernelModules = [ "dm-snapshot" "dm-thin-pool" ];
 
-    services.udev.packages = [ pkgs.lvm2 ];
+        extraUtilsCommands = ''
+          copy_bin_and_libs ${pkgs.thin-provisioning-tools}/bin/pdata_tools
+          copy_bin_and_libs ${pkgs.thin-provisioning-tools}/bin/thin_check
+        '';
+      };
 
-  };
+      environment.etc."lvm/lvm.conf".text = ''
+        global/thin_check_executable = "${pkgs.thin-provisioning-tools}/bin/thin_check"
+      '';
+    })
+    (mkIf (cfg.dmeventd.enable || cfg.boot.thin.enable) {
+      boot.initrd.preLVMCommands = ''
+          mkdir -p /etc/lvm
+          cat << EOF >> /etc/lvm/lvm.conf
+          ${optionalString cfg.boot.thin.enable ''
+            global/thin_check_executable = "$(command -v thin_check)"
+          ''}
+          ${optionalString cfg.dmeventd.enable ''
+            dmeventd/executable = "$(command -v false)"
+            activation/monitoring = 0
+          ''}
+          EOF
+      '';
+    })
+  ];
 
 }
diff --git a/nixpkgs/nixos/modules/tasks/network-interfaces-scripted.nix b/nixpkgs/nixos/modules/tasks/network-interfaces-scripted.nix
index 2e87197176b6..9ba6ccfbe716 100644
--- a/nixpkgs/nixos/modules/tasks/network-interfaces-scripted.nix
+++ b/nixpkgs/nixos/modules/tasks/network-interfaces-scripted.nix
@@ -253,8 +253,8 @@ let
 
         createTunDevice = i: nameValuePair "${i.name}-netdev"
           { description = "Virtual Network Interface ${i.name}";
-            bindsTo = [ "dev-net-tun.device" ];
-            after = [ "dev-net-tun.device" "network-pre.target" ];
+            bindsTo = optional (!config.boot.isContainer) "dev-net-tun.device";
+            after = optional (!config.boot.isContainer) "dev-net-tun.device" ++ [ "network-pre.target" ];
             wantedBy = [ "network-setup.service" (subsystemDevice i.name) ];
             partOf = [ "network-setup.service" ];
             before = [ "network-setup.service" ];
diff --git a/nixpkgs/nixos/modules/tasks/network-interfaces.nix b/nixpkgs/nixos/modules/tasks/network-interfaces.nix
index 78d669669499..c0e4d3979fda 100644
--- a/nixpkgs/nixos/modules/tasks/network-interfaces.nix
+++ b/nixpkgs/nixos/modules/tasks/network-interfaces.nix
@@ -408,6 +408,9 @@ in
         (this derives it from the machine-id that systemd generates) or
 
         <literal>head -c4 /dev/urandom | od -A none -t x4</literal>
+
+        The primary use case is to ensure when using ZFS that a pool isn't imported
+        accidentally on a wrong machine.
       '';
     };
 
@@ -516,7 +519,7 @@ in
         <option>networking.useDHCP</option> is true, then every
         interface not listed here will be configured using DHCP.
       '';
-      type = with types; loaOf (submodule interfaceOpts);
+      type = with types; attrsOf (submodule interfaceOpts);
     };
 
     networking.vswitches = mkOption {
@@ -541,7 +544,7 @@ in
           interfaces = mkOption {
             example = [ "eth0" "eth1" ];
             description = "The physical network interfaces connected by the vSwitch.";
-            type = with types; loaOf (submodule vswitchInterfaceOpts);
+            type = with types; attrsOf (submodule vswitchInterfaceOpts);
           };
 
           controllers = mkOption {
@@ -1126,7 +1129,6 @@ in
       ++ optionals config.networking.wireless.enable [
         pkgs.wirelesstools # FIXME: obsolete?
         pkgs.iw
-        pkgs.rfkill
       ]
       ++ bridgeStp;
 
diff --git a/nixpkgs/nixos/modules/testing/test-instrumentation.nix b/nixpkgs/nixos/modules/testing/test-instrumentation.nix
index 1baeab53b0c2..c0ec76e8a3a3 100644
--- a/nixpkgs/nixos/modules/testing/test-instrumentation.nix
+++ b/nixpkgs/nixos/modules/testing/test-instrumentation.nix
@@ -1,22 +1,13 @@
 # This module allows the test driver to connect to the virtual machine
 # via a root shell attached to port 514.
 
-{ config, lib, pkgs, ... }:
+{ options, config, lib, pkgs, ... }:
 
 with lib;
 with import ../../lib/qemu-flags.nix { inherit pkgs; };
 
 {
 
-  # This option is a dummy that if used in conjunction with
-  # modules/virtualisation/qemu-vm.nix gets merged with the same option defined
-  # there and only is declared here because some modules use
-  # test-instrumentation.nix but not qemu-vm.nix.
-  #
-  # One particular example are the boot tests where we want instrumentation
-  # within the images but not other stuff like setting up 9p filesystems.
-  options.virtualisation.qemu = { };
-
   config = {
 
     systemd.services.backdoor =
@@ -55,7 +46,12 @@ with import ../../lib/qemu-flags.nix { inherit pkgs; };
     systemd.services."serial-getty@hvc0".enable = false;
 
     # Only use a serial console, no TTY.
-    virtualisation.qemu.consoles = [ qemuSerialDevice ];
+    # NOTE: optionalAttrs
+    #       test-instrumentation.nix appears to be used without qemu-vm.nix, so
+    #       we avoid defining consoles if not possible.
+    # TODO: refactor such that test-instrumentation can import qemu-vm
+    #       or declare virtualisation.qemu.console option in a module that's always imported
+    virtualisation = lib.optionalAttrs (options ? virtualisation.qemu.consoles) { qemu.consoles = [ qemuSerialDevice ]; };
 
     boot.initrd.preDeviceCommands =
       ''
@@ -78,15 +74,8 @@ with import ../../lib/qemu-flags.nix { inherit pkgs; };
         # OOM killer randomly get rid of processes, since this leads
         # to failures that are hard to diagnose.
         echo 2 > /proc/sys/vm/panic_on_oom
-
-        # Coverage data is written into /tmp/coverage-data.
-        mkdir -p /tmp/xchg/coverage-data
       '';
 
-    # If the kernel has been built with coverage instrumentation, make
-    # it available under /proc/gcov.
-    boot.kernelModules = [ "gcov-proc" ];
-
     # Panic if an error occurs in stage 1 (rather than waiting for
     # user intervention).
     boot.kernelParams =
@@ -115,8 +104,6 @@ with import ../../lib/qemu-flags.nix { inherit pkgs; };
     networking.defaultGateway = mkOverride 150 "";
     networking.nameservers = mkOverride 150 [ ];
 
-    systemd.globalEnvironment.GCOV_PREFIX = "/tmp/xchg/coverage-data";
-
     system.requiredKernelConfig = with config.lib.kernelConfig; [
       (isYes "SERIAL_8250_CONSOLE")
       (isYes "SERIAL_8250")
diff --git a/nixpkgs/nixos/modules/virtualisation/azure-image.nix b/nixpkgs/nixos/modules/virtualisation/azure-image.nix
index 21fd58e5c902..60fed3222ef3 100644
--- a/nixpkgs/nixos/modules/virtualisation/azure-image.nix
+++ b/nixpkgs/nixos/modules/virtualisation/azure-image.nix
@@ -6,7 +6,7 @@ let
 in
 {
   imports = [ ./azure-common.nix ];
-  
+
   options = {
     virtualisation.azureImage.diskSize = mkOption {
       type = with types; int;
diff --git a/nixpkgs/nixos/modules/virtualisation/containers.nix b/nixpkgs/nixos/modules/virtualisation/containers.nix
index 7d184575640b..997edf77ba99 100644
--- a/nixpkgs/nixos/modules/virtualisation/containers.nix
+++ b/nixpkgs/nixos/modules/virtualisation/containers.nix
@@ -1,4 +1,4 @@
-{ config, lib, pkgs, ... }:
+{ config, lib, pkgs, utils, ... }:
 let
   cfg = config.virtualisation.containers;
 
@@ -13,16 +13,21 @@ let
     json2toml "$valuePath" "$out"
   '';
 
-  # Copy configuration files to avoid having the entire sources in the system closure
-  copyFile = filePath: pkgs.runCommandNoCC (builtins.unsafeDiscardStringContext (builtins.baseNameOf filePath)) {} ''
-    cp ${filePath} $out
-  '';
 in
 {
   meta = {
     maintainers = [] ++ lib.teams.podman.members;
   };
 
+
+  imports = [
+    (
+      lib.mkRemovedOptionModule
+      [ "virtualisation" "containers" "users" ]
+      "All users with `isNormalUser = true` set now get appropriate subuid/subgid mappings."
+    )
+  ];
+
   options.virtualisation.containers = {
 
     enable =
@@ -34,6 +39,31 @@ in
         '';
       };
 
+    ociSeccompBpfHook.enable = mkOption {
+      type = types.bool;
+      default = false;
+      description = "Enable the OCI seccomp BPF hook";
+    };
+
+    containersConf = mkOption {
+      default = {};
+      description = "containers.conf configuration";
+      type = types.submodule {
+        options = {
+
+          extraConfig = mkOption {
+            type = types.lines;
+            default = "";
+            description = ''
+              Extra configuration that should be put in the containers.conf
+              configuration file
+            '';
+
+          };
+        };
+      };
+    };
+
     registries = {
       search = mkOption {
         type = types.listOf types.str;
@@ -80,46 +110,29 @@ in
       '';
     };
 
-    users = mkOption {
-      default = [];
-      type = types.listOf types.str;
-      description = ''
-        List of users to set up subuid/subgid mappings for.
-        This is a requirement for running rootless containers.
-      '';
-    };
-
   };
 
   config = lib.mkIf cfg.enable {
 
+    environment.etc."containers/containers.conf".text = ''
+      [network]
+      cni_plugin_dirs = ["${pkgs.cni-plugins}/bin/"]
+
+      ${lib.optionalString (cfg.ociSeccompBpfHook.enable == true) ''
+      [engine]
+      hooks_dir = [
+        "${config.boot.kernelPackages.oci-seccomp-bpf-hook}",
+      ]
+      ''}
+    '' + cfg.containersConf.extraConfig;
+
     environment.etc."containers/registries.conf".source = toTOML "registries.conf" {
       registries = lib.mapAttrs (n: v: { registries = v; }) cfg.registries;
     };
 
-    users.extraUsers = builtins.listToAttrs (
-      (
-        builtins.foldl' (
-          acc: user: {
-            values = acc.values ++ [
-              {
-                name = user;
-                value = {
-                  subUidRanges = [ { startUid = acc.offset; count = 65536; } ];
-                  subGidRanges = [ { startGid = acc.offset; count = 65536; } ];
-                };
-              }
-            ];
-            offset = acc.offset + 65536;
-          }
-        )
-        { values = []; offset = 100000; } (lib.unique cfg.users)
-      ).values
-    );
-
     environment.etc."containers/policy.json".source =
       if cfg.policy != {} then pkgs.writeText "policy.json" (builtins.toJSON cfg.policy)
-      else copyFile "${pkgs.skopeo.src}/default-policy.json";
+      else utils.copyFile "${pkgs.skopeo.src}/default-policy.json";
   };
 
 }
diff --git a/nixpkgs/nixos/modules/virtualisation/cri-o.nix b/nixpkgs/nixos/modules/virtualisation/cri-o.nix
index f267c97b1788..aa416e7990a8 100644
--- a/nixpkgs/nixos/modules/virtualisation/cri-o.nix
+++ b/nixpkgs/nixos/modules/virtualisation/cri-o.nix
@@ -1,16 +1,11 @@
-{ config, lib, pkgs, ... }:
+{ config, lib, pkgs, utils, ... }:
 
 with lib;
-
 let
   cfg = config.virtualisation.cri-o;
 
   crioPackage = (pkgs.cri-o.override { inherit (cfg) extraPackages; });
 
-  # Copy configuration files to avoid having the entire sources in the system closure
-  copyFile = filePath: pkgs.runCommandNoCC (builtins.unsafeDiscardStringContext (builtins.baseNameOf filePath)) {} ''
-    cp ${filePath} $out
-  '';
 in
 {
   imports = [
@@ -78,14 +73,21 @@ in
         The final CRI-O package (including extra packages).
       '';
     };
+
+    networkDir = mkOption {
+      type = types.nullOr types.path;
+      default = null;
+      description = "Override the network_dir option.";
+      internal = true;
+    };
   };
 
   config = mkIf cfg.enable {
     environment.systemPackages = [ cfg.package pkgs.cri-tools ];
 
-    environment.etc."crictl.yaml".source = copyFile "${pkgs.cri-o-unwrapped.src}/crictl.yaml";
+    environment.etc."crictl.yaml".source = utils.copyFile "${pkgs.cri-o-unwrapped.src}/crictl.yaml";
 
-    environment.etc."crio/crio.conf".text = ''
+    environment.etc."crio/crio.conf.d/00-default.conf".text = ''
       [crio]
       storage_driver = "${cfg.storageDriver}"
 
@@ -95,11 +97,13 @@ in
 
       [crio.network]
       plugin_dirs = ["${pkgs.cni-plugins}/bin/"]
+      ${optionalString (cfg.networkDir != null) ''network_dir = "${cfg.networkDir}"''}
 
       [crio.runtime]
       cgroup_manager = "systemd"
       log_level = "${cfg.logLevel}"
-      manage_ns_lifecycle = true
+      pinns_path = "${cfg.package}/bin/pinns"
+      hooks_dir = []
 
       ${optionalString (cfg.runtime != null) ''
       default_runtime = "${cfg.runtime}"
@@ -108,7 +112,8 @@ in
       ''}
     '';
 
-    environment.etc."cni/net.d/10-crio-bridge.conf".source = copyFile "${pkgs.cri-o-unwrapped.src}/contrib/cni/10-crio-bridge.conf";
+    environment.etc."cni/net.d/10-crio-bridge.conf".source = utils.copyFile "${pkgs.cri-o-unwrapped.src}/contrib/cni/10-crio-bridge.conf";
+    environment.etc."cni/net.d/99-loopback.conf".source = utils.copyFile "${pkgs.cri-o-unwrapped.src}/contrib/cni/99-loopback.conf";
 
     # Enable common /etc/containers configuration
     virtualisation.containers.enable = true;
diff --git a/nixpkgs/nixos/modules/virtualisation/docker-preloader.nix b/nixpkgs/nixos/modules/virtualisation/docker-preloader.nix
deleted file mode 100644
index 6ab83058dee1..000000000000
--- a/nixpkgs/nixos/modules/virtualisation/docker-preloader.nix
+++ /dev/null
@@ -1,134 +0,0 @@
-{ config, lib, pkgs, ... }:
-
-with lib;
-with builtins;
-
-let
-  cfg = config.virtualisation;
-
-  sanitizeImageName = image: replaceStrings ["/"] ["-"] image.imageName;
-  hash = drv: head (split "-" (baseNameOf drv.outPath));
-  # The label of an ext4 FS is limited to 16 bytes
-  labelFromImage = image: substring 0 16 (hash image);
-
-  # The Docker image is loaded and some files from /var/lib/docker/
-  # are written into a qcow image.
-  preload = image: pkgs.vmTools.runInLinuxVM (
-    pkgs.runCommand "docker-preload-image-${sanitizeImageName image}" {
-      buildInputs = with pkgs; [ docker e2fsprogs utillinux curl kmod ];
-      preVM = pkgs.vmTools.createEmptyImage {
-        size = cfg.dockerPreloader.qcowSize;
-        fullName = "docker-deamon-image.qcow2";
-      };
-    }
-    ''
-      mkfs.ext4 /dev/vda
-      e2label /dev/vda ${labelFromImage image}
-      mkdir -p /var/lib/docker
-      mount -t ext4 /dev/vda /var/lib/docker
-
-      modprobe overlay
-
-      # from https://github.com/tianon/cgroupfs-mount/blob/master/cgroupfs-mount
-      mount -t tmpfs -o uid=0,gid=0,mode=0755 cgroup /sys/fs/cgroup
-      cd /sys/fs/cgroup
-      for sys in $(awk '!/^#/ { if ($4 == 1) print $1 }' /proc/cgroups); do
-        mkdir -p $sys
-        if ! mountpoint -q $sys; then
-          if ! mount -n -t cgroup -o $sys cgroup $sys; then
-            rmdir $sys || true
-          fi
-        fi
-      done
-
-      dockerd -H tcp://127.0.0.1:5555 -H unix:///var/run/docker.sock &
-
-      until $(curl --output /dev/null --silent --connect-timeout 2 http://127.0.0.1:5555); do
-        printf '.'
-        sleep 1
-      done
-
-      docker load -i ${image}
-
-      kill %1
-      find /var/lib/docker/ -maxdepth 1 -mindepth 1 -not -name "image" -not -name "overlay2" | xargs rm -rf
-    '');
-
-  preloadedImages = map preload cfg.dockerPreloader.images;
-
-in
-
-{
-  options.virtualisation.dockerPreloader = {
-    images = mkOption {
-      default = [ ];
-      type = types.listOf types.package;
-      description =
-      ''
-        A list of Docker images to preload (in the /var/lib/docker directory).
-      '';
-    };
-    qcowSize = mkOption {
-      default = 1024;
-      type = types.int;
-      description =
-      ''
-        The size (MB) of qcow files.
-      '';
-    };
-  };
-
-  config = mkIf (cfg.dockerPreloader.images != []) {
-    assertions = [{
-      # If docker.storageDriver is null, Docker choose the storage
-      # driver. So, in this case, we cannot be sure overlay2 is used.
-      assertion = cfg.docker.storageDriver == "overlay2"
-        || cfg.docker.storageDriver == "overlay"
-        || cfg.docker.storageDriver == null;
-      message = "The Docker image Preloader only works with overlay2 storage driver!";
-    }];
-
-    virtualisation.qemu.options =
-      map (path: "-drive if=virtio,file=${path}/disk-image.qcow2,readonly,media=cdrom,format=qcow2")
-      preloadedImages;
-
-
-    # All attached QCOW files are mounted and their contents are linked
-    # to /var/lib/docker/ in order to make image available.
-    systemd.services.docker-preloader = {
-      description = "Preloaded Docker images";
-      wantedBy = ["docker.service"];
-      after = ["network.target"];
-      path = with pkgs; [ mount rsync jq ];
-      script = ''
-        mkdir -p /var/lib/docker/overlay2/l /var/lib/docker/image/overlay2
-        echo '{}' > /tmp/repositories.json
-
-        for i in ${concatStringsSep " " (map labelFromImage cfg.dockerPreloader.images)}; do
-          mkdir -p /mnt/docker-images/$i
-
-          # The ext4 label is limited to 16 bytes
-          mount /dev/disk/by-label/$(echo $i | cut -c1-16) -o ro,noload /mnt/docker-images/$i
-
-          find /mnt/docker-images/$i/overlay2/ -maxdepth 1 -mindepth 1 -not -name l\
-             -exec ln -s '{}' /var/lib/docker/overlay2/ \;
-          cp -P /mnt/docker-images/$i/overlay2/l/* /var/lib/docker/overlay2/l/
-
-          rsync -a /mnt/docker-images/$i/image/ /var/lib/docker/image/
-
-          # Accumulate image definitions
-          cp /tmp/repositories.json /tmp/repositories.json.tmp
-          jq -s '.[0] * .[1]' \
-            /tmp/repositories.json.tmp \
-            /mnt/docker-images/$i/image/overlay2/repositories.json \
-            > /tmp/repositories.json
-        done
-
-        mv /tmp/repositories.json /var/lib/docker/image/overlay2/repositories.json
-      '';
-      serviceConfig = {
-        Type = "oneshot";
-      };
-    };
-  };
-}
diff --git a/nixpkgs/nixos/modules/virtualisation/docker.nix b/nixpkgs/nixos/modules/virtualisation/docker.nix
index 7d196a46276a..d87ada35a0ae 100644
--- a/nixpkgs/nixos/modules/virtualisation/docker.nix
+++ b/nixpkgs/nixos/modules/virtualisation/docker.nix
@@ -149,6 +149,7 @@ in
   ###### implementation
 
   config = mkIf cfg.enable (mkMerge [{
+      boot.kernelModules = [ "bridge" "veth" ];
       environment.systemPackages = [ cfg.package ]
         ++ optional cfg.enableNvidia pkgs.nvidia-docker;
       users.groups.docker.gid = config.ids.gids.docker;
diff --git a/nixpkgs/nixos/modules/virtualisation/libvirtd.nix b/nixpkgs/nixos/modules/virtualisation/libvirtd.nix
index 43b5fcfa8fae..1d6a9457dde4 100644
--- a/nixpkgs/nixos/modules/virtualisation/libvirtd.nix
+++ b/nixpkgs/nixos/modules/virtualisation/libvirtd.nix
@@ -265,8 +265,8 @@ in {
       restartIfChanged = false;
     };
 
-    systemd.sockets.libvirtd    .wantedBy = [ "sockets.target" ];
-    systemd.sockets.libvirtd-tcp.wantedBy = [ "sockets.target" ];
+    # https://libvirt.org/daemons.html#monolithic-systemd-integration
+    systemd.sockets.libvirtd.wantedBy = [ "sockets.target" ];
 
     security.polkit.extraConfig = ''
       polkit.addRule(function(action, subject) {
diff --git a/nixpkgs/nixos/modules/virtualisation/nixos-containers.nix b/nixpkgs/nixos/modules/virtualisation/nixos-containers.nix
index b0fa03917c82..8fbb4efd2019 100644
--- a/nixpkgs/nixos/modules/virtualisation/nixos-containers.nix
+++ b/nixpkgs/nixos/modules/virtualisation/nixos-containers.nix
@@ -627,7 +627,7 @@ in
 		    };
 
             bindMounts = mkOption {
-              type = with types; loaOf (submodule bindMountOpts);
+              type = with types; attrsOf (submodule bindMountOpts);
               default = {};
               example = literalExample ''
                 { "/home" = { hostPath = "/home/alice";
diff --git a/nixpkgs/nixos/modules/virtualisation/parallels-guest.nix b/nixpkgs/nixos/modules/virtualisation/parallels-guest.nix
index 828419fb4b9d..55605b388b7c 100644
--- a/nixpkgs/nixos/modules/virtualisation/parallels-guest.nix
+++ b/nixpkgs/nixos/modules/virtualisation/parallels-guest.nix
@@ -32,7 +32,7 @@ in
       };
 
       package = mkOption {
-        type = types.package;
+        type = types.nullOr types.package;
         default = config.boot.kernelPackages.prl-tools;
         defaultText = "config.boot.kernelPackages.prl-tools";
         example = literalExample "config.boot.kernelPackages.prl-tools";
diff --git a/nixpkgs/nixos/modules/virtualisation/podman.nix b/nixpkgs/nixos/modules/virtualisation/podman.nix
index 652850bf5006..f554aeffb451 100644
--- a/nixpkgs/nixos/modules/virtualisation/podman.nix
+++ b/nixpkgs/nixos/modules/virtualisation/podman.nix
@@ -1,4 +1,4 @@
-{ config, lib, pkgs, ... }:
+{ config, lib, pkgs, utils, ... }:
 let
   cfg = config.virtualisation.podman;
 
@@ -21,13 +21,12 @@ let
     done
   '';
 
-  # Copy configuration files to avoid having the entire sources in the system closure
-  copyFile = filePath: pkgs.runCommandNoCC (builtins.unsafeDiscardStringContext (builtins.baseNameOf filePath)) {} ''
-    cp ${filePath} $out
-  '';
-
 in
 {
+  imports = [
+    (lib.mkRenamedOptionModule [ "virtualisation" "podman" "libpod" ] [ "virtualisation" "containers" "containersConf" ])
+  ];
+
   meta = {
     maintainers = lib.teams.podman.members;
   };
@@ -67,25 +66,6 @@ in
       '';
     };
 
-    libpod = mkOption {
-      default = {};
-      description = "Libpod configuration";
-      type = types.submodule {
-        options = {
-
-          extraConfig = mkOption {
-            type = types.lines;
-            default = "";
-            description = ''
-              Extra configuration that should be put in the libpod.conf
-              configuration file
-            '';
-
-          };
-        };
-      };
-    };
-
     package = lib.mkOption {
       type = types.package;
       default = podmanPackage;
@@ -103,12 +83,7 @@ in
     environment.systemPackages = [ cfg.package ]
       ++ lib.optional cfg.dockerCompat dockerCompat;
 
-    environment.etc."containers/libpod.conf".text = ''
-      cni_plugin_dir = ["${pkgs.cni-plugins}/bin/"]
-
-    '' + cfg.libpod.extraConfig;
-
-    environment.etc."cni/net.d/87-podman-bridge.conflist".source = copyFile "${pkgs.podman-unwrapped.src}/cni/87-podman-bridge.conflist";
+    environment.etc."cni/net.d/87-podman-bridge.conflist".source = utils.copyFile "${pkgs.podman-unwrapped.src}/cni/87-podman-bridge.conflist";
 
     # Enable common /etc/containers configuration
     virtualisation.containers.enable = true;
diff --git a/nixpkgs/nixos/modules/virtualisation/qemu-vm.nix b/nixpkgs/nixos/modules/virtualisation/qemu-vm.nix
index be06d6feb11f..42e43f5ee023 100644
--- a/nixpkgs/nixos/modules/virtualisation/qemu-vm.nix
+++ b/nixpkgs/nixos/modules/virtualisation/qemu-vm.nix
@@ -16,11 +16,6 @@ let
 
   qemu = config.system.build.qemu or pkgs.qemu_test;
 
-  vmName =
-    if config.networking.hostName == ""
-    then "noname"
-    else config.networking.hostName;
-
   cfg = config.virtualisation;
 
   consoles = lib.concatMapStringsSep " " (c: "console=${c}") cfg.qemu.consoles;
@@ -46,6 +41,13 @@ let
         description = "Extra options passed to device flag.";
       };
 
+      name = mkOption {
+        type = types.nullOr types.str;
+        default = null;
+        description =
+          "A name for the drive. Must be unique in the drives list. Not passed to qemu.";
+      };
+
     };
 
   };
@@ -74,6 +76,32 @@ let
 
   drivesCmdLine = drives: concatStringsSep " " (imap1 driveCmdline drives);
 
+
+  # Creates a device name from a 1-based a numerical index, e.g.
+  # * `driveDeviceName 1` -> `/dev/vda`
+  # * `driveDeviceName 2` -> `/dev/vdb`
+  driveDeviceName = idx:
+    let letter = elemAt lowerChars (idx - 1);
+    in if cfg.qemu.diskInterface == "scsi" then
+      "/dev/sd${letter}"
+    else
+      "/dev/vd${letter}";
+
+  lookupDriveDeviceName = driveName: driveList:
+    (findSingle (drive: drive.name == driveName)
+      (throw "Drive ${driveName} not found")
+      (throw "Multiple drives named ${driveName}") driveList).device;
+
+  addDeviceNames =
+    imap1 (idx: drive: drive // { device = driveDeviceName idx; });
+
+  efiPrefix =
+    if (pkgs.stdenv.isi686 || pkgs.stdenv.isx86_64) then "${pkgs.OVMF.fd}/FV/OVMF"
+    else if pkgs.stdenv.isAarch64 then "${pkgs.OVMF.fd}/FV/AAVMF"
+    else throw "No EFI firmware available for platform";
+  efiFirmware = "${efiPrefix}_CODE.fd";
+  efiVarsDefault = "${efiPrefix}_VARS.fd";
+
   # Shell script to start the VM.
   startVM =
     ''
@@ -99,10 +127,14 @@ let
         # A writable boot disk can be booted from automatically.
         ${qemu}/bin/qemu-img create -f qcow2 -b ${bootDisk}/disk.img $TMPDIR/disk.img || exit 1
 
+        NIX_EFI_VARS=$(readlink -f ''${NIX_EFI_VARS:-${cfg.efiVars}})
+
         ${if cfg.useEFIBoot then ''
-          # VM needs a writable flash BIOS.
-          cp ${bootDisk}/bios.bin $TMPDIR || exit 1
-          chmod 0644 $TMPDIR/bios.bin || exit 1
+          # VM needs writable EFI vars
+          if ! test -e "$NIX_EFI_VARS"; then
+            cp ${bootDisk}/efi-vars.fd "$NIX_EFI_VARS" || exit 1
+            chmod 0644 "$NIX_EFI_VARS" || exit 1
+          fi
         '' else ''
         ''}
       '' else ''
@@ -119,7 +151,7 @@ let
 
       # Start QEMU.
       exec ${qemuBinary qemu} \
-          -name ${vmName} \
+          -name ${config.system.name} \
           -m ${toString config.virtualisation.memorySize} \
           -smp ${toString config.virtualisation.cores} \
           -device virtio-rng-pci \
@@ -139,6 +171,8 @@ let
 
   # Generate a hard disk image containing a /boot partition and GRUB
   # in the MBR.  Used when the `useBootLoader' option is set.
+  # Uses `runInLinuxVM` to create the image in a throwaway VM.
+  # See note [Disk layout with `useBootLoader`].
   # FIXME: use nixos/lib/make-disk-image.nix.
   bootDisk =
     pkgs.vmTools.runInLinuxVM (
@@ -147,21 +181,22 @@ let
             ''
               mkdir $out
               diskImage=$out/disk.img
-              bootFlash=$out/bios.bin
-              ${qemu}/bin/qemu-img create -f qcow2 $diskImage "40M"
+              ${qemu}/bin/qemu-img create -f qcow2 $diskImage "60M"
               ${if cfg.useEFIBoot then ''
-                cp ${pkgs.OVMF-CSM.fd}/FV/OVMF.fd $bootFlash
-                chmod 0644 $bootFlash
+                efiVars=$out/efi-vars.fd
+                cp ${efiVarsDefault} $efiVars
+                chmod 0644 $efiVars
               '' else ''
               ''}
             '';
           buildInputs = [ pkgs.utillinux ];
-          QEMU_OPTS = if cfg.useEFIBoot
-                      then "-pflash $out/bios.bin -nographic -serial pty"
-                      else "-nographic -serial pty";
+          QEMU_OPTS = "-nographic -serial stdio -monitor none"
+                      + lib.optionalString cfg.useEFIBoot (
+                        " -drive if=pflash,format=raw,unit=0,readonly=on,file=${efiFirmware}"
+                      + " -drive if=pflash,format=raw,unit=1,file=$efiVars");
         }
         ''
-          # Create a /boot EFI partition with 40M and arbitrary but fixed GUIDs for reproducibility
+          # Create a /boot EFI partition with 60M and arbitrary but fixed GUIDs for reproducibility
           ${pkgs.gptfdisk}/bin/sgdisk \
             --set-alignment=1 --new=1:34:2047 --change-name=1:BIOSBootPartition --typecode=1:ef02 \
             --set-alignment=512 --largest-new=2 --change-name=2:EFISystem --typecode=2:ef00 \
@@ -172,6 +207,19 @@ let
             --partition-guid=2:970C694F-AFD0-4B99-B750-CDB7A329AB6F \
             --hybrid 2 \
             --recompute-chs /dev/vda
+
+          ${optionalString (config.boot.loader.grub.device != "/dev/vda")
+            # In this throwaway VM, we only have the /dev/vda disk, but the
+            # actual VM described by `config` (used by `switch-to-configuration`
+            # below) may set `boot.loader.grub.device` to a different device
+            # that's nonexistent in the throwaway VM.
+            # Create a symlink for that device, so that the `grub-install`
+            # by `switch-to-configuration` will hit /dev/vda anyway.
+            ''
+              ln -s /dev/vda ${config.boot.loader.grub.device}
+            ''
+          }
+
           ${pkgs.dosfstools}/bin/mkfs.fat -F16 /dev/vda2
           export MTOOLS_SKIP_CHECK=1
           ${pkgs.mtools}/bin/mlabel -i /dev/vda2 ::boot
@@ -185,6 +233,10 @@ let
           mkdir /boot
           mount /dev/vda2 /boot
 
+          ${optionalString config.boot.loader.efi.canTouchEfiVariables ''
+            mount -t efivarfs efivarfs /sys/firmware/efi/efivars
+          ''}
+
           # This is needed for GRUB 0.97, which doesn't know about virtio devices.
           mkdir /boot/grub
           echo '(hd0) /dev/vda' > /boot/grub/device.map
@@ -212,7 +264,6 @@ in
 {
   imports = [
     ../profiles/qemu-guest.nix
-   ./docker-preloader.nix
   ];
 
   options = {
@@ -237,7 +288,7 @@ in
 
     virtualisation.diskImage =
       mkOption {
-        default = "./${vmName}.qcow2";
+        default = "./${config.system.name}.qcow2";
         description =
           ''
             Path to the disk image containing the root filesystem.
@@ -396,6 +447,7 @@ in
         mkOption {
           type = types.listOf (types.submodule driveOpts);
           description = "Drives passed to qemu.";
+          apply = addDeviceNames;
         };
 
       diskInterface =
@@ -441,6 +493,16 @@ in
           '';
       };
 
+    virtualisation.efiVars =
+      mkOption {
+        default = "./${config.system.name}-efi-vars.fd";
+        description =
+          ''
+            Path to nvram image containing UEFI variables.  The will be created
+            on startup if it does not exist.
+          '';
+      };
+
     virtualisation.bios =
       mkOption {
         default = null;
@@ -457,7 +519,27 @@ in
 
   config = {
 
-    boot.loader.grub.device = mkVMOverride cfg.bootDevice;
+    # Note [Disk layout with `useBootLoader`]
+    #
+    # If `useBootLoader = true`, we configure 2 drives:
+    # `/dev/?da` for the root disk, and `/dev/?db` for the boot disk
+    # which has the `/boot` partition and the boot loader.
+    # Concretely:
+    #
+    # * The second drive's image `disk.img` is created in `bootDisk = ...`
+    #   using a throwaway VM. Note that there the disk is always `/dev/vda`,
+    #   even though in the final VM it will be at `/dev/*b`.
+    # * The disks are attached in `virtualisation.qemu.drives`.
+    #   Their order makes them appear as devices `a`, `b`, etc.
+    # * `fileSystems."/boot"` is adjusted to be on device `b`.
+
+    # If `useBootLoader`, GRUB goes to the second disk, see
+    # note [Disk layout with `useBootLoader`].
+    boot.loader.grub.device = mkVMOverride (
+      if cfg.useBootLoader
+        then driveDeviceName 2 # second disk
+        else cfg.bootDevice
+    );
 
     boot.initrd.extraUtilsCommands =
       ''
@@ -512,8 +594,7 @@ in
       optional cfg.writableStore "overlay"
       ++ optional (cfg.qemu.diskInterface == "scsi") "sym53c8xx";
 
-    virtualisation.bootDevice =
-      mkDefault (if cfg.qemu.diskInterface == "scsi" then "/dev/sda" else "/dev/vda");
+    virtualisation.bootDevice = mkDefault (driveDeviceName 1);
 
     virtualisation.pathsInNixDB = [ config.system.build.toplevel ];
 
@@ -531,7 +612,8 @@ in
         ''-append "$(cat ${config.system.build.toplevel}/kernel-params) init=${config.system.build.toplevel}/init regInfo=${regInfo}/registration ${consoles} $QEMU_KERNEL_PARAMS"''
       ])
       (mkIf cfg.useEFIBoot [
-        "-pflash $TMPDIR/bios.bin"
+        "-drive if=pflash,format=raw,unit=0,readonly,file=${efiFirmware}"
+        "-drive if=pflash,format=raw,unit=1,file=$NIX_EFI_VARS"
       ])
       (mkIf (cfg.bios != null) [
         "-bios ${cfg.bios}/bios.bin"
@@ -542,25 +624,22 @@ in
     ];
 
     virtualisation.qemu.drives = mkMerge [
+      [{
+        name = "root";
+        file = "$NIX_DISK_IMAGE";
+        driveExtraOpts.cache = "writeback";
+        driveExtraOpts.werror = "report";
+      }]
       (mkIf cfg.useBootLoader [
+        # The order of this list determines the device names, see
+        # note [Disk layout with `useBootLoader`].
         {
-          file = "$NIX_DISK_IMAGE";
-          driveExtraOpts.cache = "writeback";
-          driveExtraOpts.werror = "report";
-        }
-        {
+          name = "boot";
           file = "$TMPDIR/disk.img";
           driveExtraOpts.media = "disk";
           deviceExtraOpts.bootindex = "1";
         }
       ])
-      (mkIf (!cfg.useBootLoader) [
-        {
-          file = "$NIX_DISK_IMAGE";
-          driveExtraOpts.cache = "writeback";
-          driveExtraOpts.werror = "report";
-        }
-      ])
       (imap0 (idx: _: {
         file = "$(pwd)/empty${toString idx}.qcow2";
         driveExtraOpts.werror = "report";
@@ -608,9 +687,9 @@ in
           };
       } // optionalAttrs cfg.useBootLoader
       { "/boot" =
-          { device = "/dev/vdb2";
+          # see note [Disk layout with `useBootLoader`]
+          { device = "${lookupDriveDeviceName "boot" cfg.qemu.drives}2"; # 2 for e.g. `vdb2`, as created in `bootDisk`
             fsType = "vfat";
-            options = [ "ro" ];
             noCheck = true; # fsck fails on a r/o filesystem
           };
       });
@@ -627,7 +706,7 @@ in
       ''
         mkdir -p $out/bin
         ln -s ${config.system.build.toplevel} $out/system
-        ln -s ${pkgs.writeScript "run-nixos-vm" startVM} $out/bin/run-${vmName}-vm
+        ln -s ${pkgs.writeScript "run-nixos-vm" startVM} $out/bin/run-${config.system.name}-vm
       '';
 
     # When building a regular system configuration, override whatever
diff --git a/nixpkgs/nixos/modules/virtualisation/railcar.nix b/nixpkgs/nixos/modules/virtualisation/railcar.nix
index 12da1c75fc38..10464f628984 100644
--- a/nixpkgs/nixos/modules/virtualisation/railcar.nix
+++ b/nixpkgs/nixos/modules/virtualisation/railcar.nix
@@ -29,9 +29,9 @@ let
         default = "none";
         description = ''
           The type of the filesystem to be mounted.
-          Linux: filesystem types supported by the kernel as listed in 
-          `/proc/filesystems` (e.g., "minix", "ext2", "ext3", "jfs", "xfs", 
-          "reiserfs", "msdos", "proc", "nfs", "iso9660"). For bind mounts 
+          Linux: filesystem types supported by the kernel as listed in
+          `/proc/filesystems` (e.g., "minix", "ext2", "ext3", "jfs", "xfs",
+          "reiserfs", "msdos", "proc", "nfs", "iso9660"). For bind mounts
           (when options include either bind or rbind), the type is a dummy,
           often "none" (not listed in /proc/filesystems).
         '';
@@ -41,13 +41,13 @@ let
         description = "Source for the in-container mount";
       };
       options = mkOption {
-        type = loaOf (str);
+        type = attrsOf (str);
         default = [ "bind" ];
         description = ''
           Mount options of the filesystem to be used.
-        
-          Support optoions are listed in the mount(8) man page. Note that 
-          both filesystem-independent and filesystem-specific options 
+
+          Support options are listed in the mount(8) man page. Note that
+          both filesystem-independent and filesystem-specific options
           are listed.
         '';
       };
@@ -61,7 +61,7 @@ in
     containers = mkOption {
       default = {};
       description = "Declarative container configuration";
-      type = with types; loaOf (submodule ({ name, config, ... }: {
+      type = with types; attrsOf (submodule ({ name, config, ... }: {
         options = {
           cmd = mkOption {
             type = types.lines;
diff --git a/nixpkgs/nixos/modules/virtualisation/spice-usb-redirection.nix b/nixpkgs/nixos/modules/virtualisation/spice-usb-redirection.nix
new file mode 100644
index 000000000000..4168cebe79b1
--- /dev/null
+++ b/nixpkgs/nixos/modules/virtualisation/spice-usb-redirection.nix
@@ -0,0 +1,24 @@
+{ config, pkgs, lib, ... }:
+{
+  options.virtualisation.spiceUSBRedirection.enable = lib.mkOption {
+    type = lib.types.bool;
+    default = false;
+    description = ''
+      Install the SPICE USB redirection helper with setuid
+      privileges. This allows unprivileged users to pass USB devices
+      connected to this machine to libvirt VMs, both local and
+      remote. Note that this allows users arbitrary access to USB
+      devices.
+    '';
+  };
+
+  config = lib.mkIf config.virtualisation.spiceUSBRedirection.enable {
+    environment.systemPackages = [ pkgs.spice-gtk ]; # For polkit actions
+    security.wrappers.spice-client-glib-usb-acl-helper ={
+      source = "${pkgs.spice-gtk}/bin/spice-client-glib-usb-acl-helper";
+      capabilities = "cap_fowner+ep";
+    };
+  };
+
+  meta.maintainers = [ lib.maintainers.lheckemann ];
+}
diff --git a/nixpkgs/nixos/modules/virtualisation/virtualbox-guest.nix b/nixpkgs/nixos/modules/virtualisation/virtualbox-guest.nix
index 834b994e92d2..486951983d30 100644
--- a/nixpkgs/nixos/modules/virtualisation/virtualbox-guest.nix
+++ b/nixpkgs/nixos/modules/virtualisation/virtualbox-guest.nix
@@ -68,7 +68,7 @@ in
         SUBSYSTEM=="misc", KERNEL=="vboxguest", TAG+="systemd"
       '';
   } (mkIf cfg.x11 {
-    services.xserver.videoDrivers = mkOverride 50 [ "virtualbox" "modesetting" ];
+    services.xserver.videoDrivers = mkOverride 50 [ "vmware" "virtualbox" "modesetting" ];
 
     services.xserver.config =
       ''
diff --git a/nixpkgs/nixos/modules/virtualisation/virtualbox-image.nix b/nixpkgs/nixos/modules/virtualisation/virtualbox-image.nix
index 788b4d9d9761..fa580e8b42d6 100644
--- a/nixpkgs/nixos/modules/virtualisation/virtualbox-image.nix
+++ b/nixpkgs/nixos/modules/virtualisation/virtualbox-image.nix
@@ -58,6 +58,35 @@ in {
           Run <literal>VBoxManage modifyvm --help</literal> to see more options.
         '';
      };
+      extraDisk = mkOption {
+        description = ''
+          Optional extra disk/hdd configuration.
+          The disk will be an 'ext4' partition on a separate VMDK file.
+        '';
+        default = null;
+        example = {
+          label = "storage";
+          mountPoint = "/home/demo/storage";
+          size = 100 * 1024;
+        };
+        type = types.nullOr (types.submodule {
+          options = {
+            size = mkOption {
+              type = types.int;
+              description = "Size in MiB";
+            };
+            label = mkOption {
+              type = types.str;
+              default = "vm-extra-storage";
+              description = "Label for the disk partition";
+            };
+            mountPoint = mkOption {
+              type = types.str;
+              description = "Path where to mount this disk.";
+            };
+          };
+        });
+      };
     };
   };
 
@@ -72,6 +101,7 @@ in {
         audiocontroller = "ac97";
         audio = "alsa";
         audioout = "on";
+        graphicscontroller = "vmsvga";
         rtcuseutc = "on";
         usb = "on";
         usbehci = "on";
@@ -95,6 +125,20 @@ in {
           echo "creating VirtualBox pass-through disk wrapper (no copying involved)..."
           VBoxManage internalcommands createrawvmdk -filename disk.vmdk -rawdisk $diskImage
 
+          ${optionalString (cfg.extraDisk != null) ''
+            echo "creating extra disk: data-disk.raw"
+            dataDiskImage=data-disk.raw
+            truncate -s ${toString cfg.extraDisk.size}M $dataDiskImage
+
+            parted --script $dataDiskImage -- \
+              mklabel msdos \
+              mkpart primary ext4 1MiB -1
+            eval $(partx $dataDiskImage -o START,SECTORS --nr 1 --pairs)
+            mkfs.ext4 -F -L ${cfg.extraDisk.label} $dataDiskImage -E offset=$(sectorsToBytes $START) $(sectorsToKilobytes $SECTORS)K
+            echo "creating extra disk: data-disk.vmdk"
+            VBoxManage internalcommands createrawvmdk -filename data-disk.vmdk -rawdisk $dataDiskImage
+          ''}
+
           echo "creating VirtualBox VM..."
           vmName="${cfg.vmName}";
           VBoxManage createvm --name "$vmName" --register \
@@ -105,6 +149,10 @@ in {
           VBoxManage storagectl "$vmName" --name SATA --add sata --portcount 4 --bootable on --hostiocache on
           VBoxManage storageattach "$vmName" --storagectl SATA --port 0 --device 0 --type hdd \
             --medium disk.vmdk
+          ${optionalString (cfg.extraDisk != null) ''
+            VBoxManage storageattach "$vmName" --storagectl SATA --port 1 --device 0 --type hdd \
+            --medium data-disk.vmdk
+          ''}
 
           echo "exporting VirtualBox VM..."
           mkdir -p $out
@@ -118,11 +166,19 @@ in {
         '';
     };
 
-    fileSystems."/" = {
-      device = "/dev/disk/by-label/nixos";
-      autoResize = true;
-      fsType = "ext4";
-    };
+    fileSystems = {
+      "/" = {
+        device = "/dev/disk/by-label/nixos";
+        autoResize = true;
+        fsType = "ext4";
+      };
+    } // (lib.optionalAttrs (cfg.extraDisk != null) {
+      ${cfg.extraDisk.mountPoint} = {
+        device = "/dev/disk/by-label/" + cfg.extraDisk.label;
+        autoResize = true;
+        fsType = "ext4";
+      };
+    });
 
     boot.growPartition = true;
     boot.loader.grub.device = "/dev/sda";