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-rw-r--r--pkgs/applications/audio/AMB-plugins/default.nix2
-rw-r--r--pkgs/applications/audio/FIL-plugins/default.nix2
-rw-r--r--pkgs/applications/audio/a2jmidid/default.nix4
-rw-r--r--pkgs/applications/audio/aacgain/default.nix2
-rw-r--r--pkgs/applications/audio/abcde/default.nix2
-rw-r--r--pkgs/applications/audio/airwave/default.nix2
-rw-r--r--pkgs/applications/audio/aj-snapshot/default.nix2
-rw-r--r--pkgs/applications/audio/amarok/default.nix2
-rw-r--r--pkgs/applications/audio/ardour/default.nix2
-rw-r--r--pkgs/applications/audio/ario/default.nix2
-rw-r--r--pkgs/applications/audio/artyFX/default.nix2
-rw-r--r--pkgs/applications/audio/asunder/default.nix2
-rw-r--r--pkgs/applications/audio/audacious/default.nix2
-rw-r--r--pkgs/applications/audio/audacious/qt-5.nix2
-rw-r--r--pkgs/applications/audio/audacity/default.nix2
-rw-r--r--pkgs/applications/audio/audio-recorder/default.nix2
-rw-r--r--pkgs/applications/audio/aumix/default.nix2
-rw-r--r--pkgs/applications/audio/axoloti/default.nix2
-rw-r--r--pkgs/applications/audio/axoloti/dfu-util.nix2
-rw-r--r--pkgs/applications/audio/axoloti/libusb1.nix2
-rw-r--r--pkgs/applications/audio/baudline/default.nix2
-rw-r--r--pkgs/applications/audio/bitmeter/default.nix4
-rw-r--r--pkgs/applications/audio/bitwig-studio/bitwig-studio1.nix2
-rw-r--r--pkgs/applications/audio/bristol/default.nix2
-rw-r--r--pkgs/applications/audio/bs1770gain/default.nix2
-rw-r--r--pkgs/applications/audio/bsequencer/default.nix2
-rw-r--r--pkgs/applications/audio/bshapr/default.nix2
-rw-r--r--pkgs/applications/audio/bslizr/default.nix2
-rw-r--r--pkgs/applications/audio/cadence/default.nix2
-rw-r--r--pkgs/applications/audio/calf/default.nix2
-rw-r--r--pkgs/applications/audio/caps/default.nix2
-rw-r--r--pkgs/applications/audio/carla/default.nix2
-rw-r--r--pkgs/applications/audio/caudec/default.nix2
-rw-r--r--pkgs/applications/audio/cava/default.nix2
-rw-r--r--pkgs/applications/audio/cd-discid/default.nix2
-rw-r--r--pkgs/applications/audio/cdparanoia/default.nix2
-rw-r--r--pkgs/applications/audio/chuck/default.nix2
-rw-r--r--pkgs/applications/audio/clementine/default.nix4
-rw-r--r--pkgs/applications/audio/clerk/default.nix2
-rw-r--r--pkgs/applications/audio/cmus/default.nix2
-rw-r--r--pkgs/applications/audio/cmusfm/default.nix2
-rw-r--r--pkgs/applications/audio/cozy-audiobooks/default.nix2
-rw-r--r--pkgs/applications/audio/crip/default.nix2
-rw-r--r--pkgs/applications/audio/csa/default.nix2
-rw-r--r--pkgs/applications/audio/csound/csound-qt/default.nix2
-rw-r--r--pkgs/applications/audio/csound/default.nix2
-rw-r--r--pkgs/applications/audio/deadbeef/plugins/headerbar-gtk3.nix2
-rw-r--r--pkgs/applications/audio/deadbeef/plugins/infobar.nix2
-rw-r--r--pkgs/applications/audio/deadbeef/plugins/mpris2.nix2
-rw-r--r--pkgs/applications/audio/denemo/default.nix2
-rw-r--r--pkgs/applications/audio/dfasma/default.nix2
-rw-r--r--pkgs/applications/audio/dirt/default.nix2
-rw-r--r--pkgs/applications/audio/distrho/default.nix2
-rw-r--r--pkgs/applications/audio/dr14_tmeter/default.nix2
-rw-r--r--pkgs/applications/audio/dragonfly-reverb/default.nix2
-rw-r--r--pkgs/applications/audio/drumgizmo/default.nix2
-rw-r--r--pkgs/applications/audio/easytag/default.nix2
-rw-r--r--pkgs/applications/audio/ecasound/default.nix2
-rw-r--r--pkgs/applications/audio/eflite/default.nix2
-rw-r--r--pkgs/applications/audio/ensemble-chorus/default.nix2
-rw-r--r--pkgs/applications/audio/eq10q/default.nix4
-rw-r--r--pkgs/applications/audio/espeak/default.nix2
-rw-r--r--pkgs/applications/audio/espeak/edit.nix2
-rw-r--r--pkgs/applications/audio/eteroj.lv2/default.nix2
-rw-r--r--pkgs/applications/audio/faust/faust1.nix4
-rw-r--r--pkgs/applications/audio/faust/faust2.nix4
-rw-r--r--pkgs/applications/audio/faust/faustlive.nix2
-rw-r--r--pkgs/applications/audio/flac/default.nix2
-rw-r--r--pkgs/applications/audio/flac123/default.nix2
-rw-r--r--pkgs/applications/audio/flacon/default.nix2
-rw-r--r--pkgs/applications/audio/fluidsynth/default.nix2
-rw-r--r--pkgs/applications/audio/fmit/default.nix2
-rw-r--r--pkgs/applications/audio/fmsynth/default.nix2
-rw-r--r--pkgs/applications/audio/fomp/default.nix2
-rw-r--r--pkgs/applications/audio/foo-yc20/default.nix2
-rw-r--r--pkgs/applications/audio/freewheeling/default.nix2
-rw-r--r--pkgs/applications/audio/game-music-emu/default.nix2
-rw-r--r--pkgs/applications/audio/gigedit/default.nix2
-rw-r--r--pkgs/applications/audio/gjay/default.nix2
-rw-r--r--pkgs/applications/audio/gmpc/default.nix4
-rw-r--r--pkgs/applications/audio/gmu/default.nix2
-rw-r--r--pkgs/applications/audio/gnome-podcasts/default.nix2
-rw-r--r--pkgs/applications/audio/google-play-music-desktop-player/default.nix2
-rw-r--r--pkgs/applications/audio/gpodder/default.nix2
-rw-r--r--pkgs/applications/audio/gradio/default.nix2
-rw-r--r--pkgs/applications/audio/gtklick/default.nix2
-rw-r--r--pkgs/applications/audio/gtkpod/default.nix2
-rw-r--r--pkgs/applications/audio/guitarix/default.nix2
-rw-r--r--pkgs/applications/audio/gxmatcheq-lv2/default.nix2
-rw-r--r--pkgs/applications/audio/gxplugins-lv2/default.nix2
-rw-r--r--pkgs/applications/audio/helio-workstation/default.nix2
-rw-r--r--pkgs/applications/audio/helm/default.nix2
-rw-r--r--pkgs/applications/audio/hybridreverb2/default.nix2
-rw-r--r--pkgs/applications/audio/hydrogen/default.nix2
-rw-r--r--pkgs/applications/audio/i-score/default.nix2
-rw-r--r--pkgs/applications/audio/iannix/default.nix2
-rw-r--r--pkgs/applications/audio/id3v2/default.nix2
-rw-r--r--pkgs/applications/audio/infamousPlugins/default.nix2
-rw-r--r--pkgs/applications/audio/ingen/default.nix2
-rw-r--r--pkgs/applications/audio/ir.lv2/default.nix2
-rw-r--r--pkgs/applications/audio/jaaa/default.nix2
-rw-r--r--pkgs/applications/audio/jack-capture/default.nix2
-rw-r--r--pkgs/applications/audio/jack-oscrolloscope/default.nix2
-rw-r--r--pkgs/applications/audio/jack-rack/default.nix2
-rw-r--r--pkgs/applications/audio/jackmeter/default.nix2
-rw-r--r--pkgs/applications/audio/jackmix/default.nix4
-rw-r--r--pkgs/applications/audio/jalv/default.nix2
-rw-r--r--pkgs/applications/audio/jamin/default.nix4
-rw-r--r--pkgs/applications/audio/japa/default.nix2
-rw-r--r--pkgs/applications/audio/keyfinder/default.nix2
-rw-r--r--pkgs/applications/audio/kid3/default.nix2
-rw-r--r--pkgs/applications/audio/klick/default.nix2
-rw-r--r--pkgs/applications/audio/ladspa-plugins/default.nix2
-rw-r--r--pkgs/applications/audio/ladspa-sdk/default.nix2
-rw-r--r--pkgs/applications/audio/ladspa-sdk/ladspah.nix2
-rw-r--r--pkgs/applications/audio/lash/default.nix2
-rw-r--r--pkgs/applications/audio/lastfmsubmitd/default.nix2
-rw-r--r--pkgs/applications/audio/linuxband/default.nix2
-rw-r--r--pkgs/applications/audio/linuxsampler/default.nix2
-rw-r--r--pkgs/applications/audio/lmms/default.nix2
-rw-r--r--pkgs/applications/audio/lollypop/default.nix2
-rw-r--r--pkgs/applications/audio/lsp-plugins/default.nix2
-rw-r--r--pkgs/applications/audio/luppp/default.nix2
-rw-r--r--pkgs/applications/audio/lv2bm/default.nix2
-rw-r--r--pkgs/applications/audio/magnetophonDSP/CharacterCompressor/default.nix2
-rw-r--r--pkgs/applications/audio/magnetophonDSP/CompBus/default.nix2
-rw-r--r--pkgs/applications/audio/magnetophonDSP/ConstantDetuneChorus/default.nix2
-rw-r--r--pkgs/applications/audio/magnetophonDSP/LazyLimiter/default.nix2
-rw-r--r--pkgs/applications/audio/magnetophonDSP/MBdistortion/default.nix2
-rw-r--r--pkgs/applications/audio/magnetophonDSP/RhythmDelay/default.nix2
-rw-r--r--pkgs/applications/audio/magnetophonDSP/VoiceOfFaust/default.nix2
-rw-r--r--pkgs/applications/audio/magnetophonDSP/faustCompressors/default.nix2
-rw-r--r--pkgs/applications/audio/magnetophonDSP/pluginUtils/default.nix2
-rw-r--r--pkgs/applications/audio/magnetophonDSP/shelfMultiBand/default.nix2
-rw-r--r--pkgs/applications/audio/mda-lv2/default.nix2
-rw-r--r--pkgs/applications/audio/meterbridge/default.nix2
-rw-r--r--pkgs/applications/audio/meters_lv2/default.nix2
-rw-r--r--pkgs/applications/audio/mhwaveedit/default.nix2
-rw-r--r--pkgs/applications/audio/mid2key/default.nix2
-rw-r--r--pkgs/applications/audio/midas/m32edit.nix2
-rw-r--r--pkgs/applications/audio/midas/x32edit.nix2
-rw-r--r--pkgs/applications/audio/midisheetmusic/default.nix2
-rw-r--r--pkgs/applications/audio/mikmod/default.nix2
-rw-r--r--pkgs/applications/audio/milkytracker/default.nix2
-rw-r--r--pkgs/applications/audio/mimic/default.nix2
-rw-r--r--pkgs/applications/audio/mimms/default.nix2
-rw-r--r--pkgs/applications/audio/mixxx/default.nix2
-rw-r--r--pkgs/applications/audio/moc/default.nix2
-rw-r--r--pkgs/applications/audio/mod-distortion/default.nix2
-rw-r--r--pkgs/applications/audio/mopidy/gmusic.nix2
-rw-r--r--pkgs/applications/audio/mopidy/iris.nix2
-rw-r--r--pkgs/applications/audio/mopidy/local-images.nix2
-rw-r--r--pkgs/applications/audio/mopidy/local-sqlite.nix2
-rw-r--r--pkgs/applications/audio/mopidy/moped.nix2
-rw-r--r--pkgs/applications/audio/mopidy/mopify.nix2
-rw-r--r--pkgs/applications/audio/mopidy/spotify.nix2
-rw-r--r--pkgs/applications/audio/mp3blaster/default.nix2
-rw-r--r--pkgs/applications/audio/mp3gain/default.nix2
-rw-r--r--pkgs/applications/audio/mp3info/default.nix2
-rw-r--r--pkgs/applications/audio/mp3splt/default.nix2
-rw-r--r--pkgs/applications/audio/mp3val/default.nix2
-rw-r--r--pkgs/applications/audio/mpc/default.nix2
-rw-r--r--pkgs/applications/audio/mpc123/default.nix2
-rw-r--r--pkgs/applications/audio/mpg123/default.nix2
-rw-r--r--pkgs/applications/audio/mpg321/default.nix2
-rw-r--r--pkgs/applications/audio/mup/default.nix2
-rw-r--r--pkgs/applications/audio/musescore/darwin.nix4
-rw-r--r--pkgs/applications/audio/musescore/default.nix4
-rw-r--r--pkgs/applications/audio/musly/default.nix2
-rw-r--r--pkgs/applications/audio/ncmpc/default.nix2
-rw-r--r--pkgs/applications/audio/ncmpcpp/default.nix2
-rw-r--r--pkgs/applications/audio/ncpamixer/default.nix2
-rw-r--r--pkgs/applications/audio/netease-cloud-music/default.nix2
-rw-r--r--pkgs/applications/audio/noise-repellent/default.nix2
-rw-r--r--pkgs/applications/audio/non/default.nix2
-rw-r--r--pkgs/applications/audio/nootka/default.nix2
-rw-r--r--pkgs/applications/audio/nootka/unstable.nix2
-rw-r--r--pkgs/applications/audio/normalize/default.nix2
-rw-r--r--pkgs/applications/audio/nova-filters/default.nix4
-rw-r--r--pkgs/applications/audio/openmpt123/default.nix2
-rw-r--r--pkgs/applications/audio/opus-tools/default.nix2
-rw-r--r--pkgs/applications/audio/opusfile/default.nix2
-rw-r--r--pkgs/applications/audio/pamix/default.nix2
-rw-r--r--pkgs/applications/audio/pamixer/default.nix2
-rw-r--r--pkgs/applications/audio/paprefs/default.nix2
-rw-r--r--pkgs/applications/audio/patchage/default.nix4
-rw-r--r--pkgs/applications/audio/paulstretch/default.nix2
-rw-r--r--pkgs/applications/audio/pavucontrol/default.nix2
-rw-r--r--pkgs/applications/audio/pd-plugins/cyclone/default.nix2
-rw-r--r--pkgs/applications/audio/pd-plugins/helmholtz/default.nix2
-rw-r--r--pkgs/applications/audio/pd-plugins/maxlib/default.nix2
-rw-r--r--pkgs/applications/audio/pd-plugins/mrpeach/default.nix2
-rw-r--r--pkgs/applications/audio/pd-plugins/puremapping/default.nix2
-rw-r--r--pkgs/applications/audio/pd-plugins/timbreid/default.nix2
-rw-r--r--pkgs/applications/audio/pd-plugins/zexy/default.nix2
-rw-r--r--pkgs/applications/audio/petrifoo/default.nix2
-rw-r--r--pkgs/applications/audio/pianobooster/default.nix2
-rw-r--r--pkgs/applications/audio/pithos/default.nix2
-rw-r--r--pkgs/applications/audio/playbar2/default.nix2
-rw-r--r--pkgs/applications/audio/plugin-torture/default.nix2
-rw-r--r--pkgs/applications/audio/pmidi/default.nix2
-rw-r--r--pkgs/applications/audio/ponymix/default.nix2
-rw-r--r--pkgs/applications/audio/praat/default.nix2
-rw-r--r--pkgs/applications/audio/projectm/default.nix4
-rw-r--r--pkgs/applications/audio/puddletag/default.nix2
-rw-r--r--pkgs/applications/audio/pulseaudio-ctl/default.nix2
-rw-r--r--pkgs/applications/audio/pulseaudio-dlna/zeroconf.nix2
-rw-r--r--pkgs/applications/audio/pulseaudio-modules-bt/default.nix2
-rw-r--r--pkgs/applications/audio/pulseeffects/default.nix2
-rw-r--r--pkgs/applications/audio/puredata/default.nix2
-rw-r--r--pkgs/applications/audio/qjackctl/default.nix2
-rw-r--r--pkgs/applications/audio/qmidinet/default.nix2
-rw-r--r--pkgs/applications/audio/qmmp/default.nix2
-rw-r--r--pkgs/applications/audio/qsampler/default.nix2
-rw-r--r--pkgs/applications/audio/qsynth/default.nix2
-rw-r--r--pkgs/applications/audio/qtractor/default.nix2
-rw-r--r--pkgs/applications/audio/qtscrobbler/default.nix2
-rw-r--r--pkgs/applications/audio/quodlibet/default.nix2
-rw-r--r--pkgs/applications/audio/radiotray-ng/default.nix2
-rw-r--r--pkgs/applications/audio/rakarrack/default.nix2
-rw-r--r--pkgs/applications/audio/reaper/default.nix2
-rw-r--r--pkgs/applications/audio/renoise/default.nix2
-rw-r--r--pkgs/applications/audio/rhvoice/default.nix2
-rw-r--r--pkgs/applications/audio/rhythmbox/default.nix2
-rw-r--r--pkgs/applications/audio/rkrlv2/default.nix2
-rw-r--r--pkgs/applications/audio/rosegarden/default.nix2
-rw-r--r--pkgs/applications/audio/schismtracker/default.nix2
-rw-r--r--pkgs/applications/audio/seq24/default.nix2
-rw-r--r--pkgs/applications/audio/shntool/default.nix4
-rw-r--r--pkgs/applications/audio/sidplayfp/default.nix2
-rw-r--r--pkgs/applications/audio/sisco.lv2/default.nix2
-rw-r--r--pkgs/applications/audio/snapcast/default.nix2
-rw-r--r--pkgs/applications/audio/sndpeek/default.nix2
-rw-r--r--pkgs/applications/audio/sonata/default.nix2
-rw-r--r--pkgs/applications/audio/sonic-lineup/default.nix2
-rw-r--r--pkgs/applications/audio/sonic-visualiser/default.nix2
-rw-r--r--pkgs/applications/audio/sooperlooper/default.nix2
-rw-r--r--pkgs/applications/audio/sorcer/default.nix2
-rw-r--r--pkgs/applications/audio/sound-juicer/default.nix2
-rw-r--r--pkgs/applications/audio/soundscape-renderer/default.nix4
-rw-r--r--pkgs/applications/audio/spectmorph/default.nix2
-rw-r--r--pkgs/applications/audio/spectrojack/default.nix2
-rw-r--r--pkgs/applications/audio/speech-denoiser/default.nix2
-rw-r--r--pkgs/applications/audio/spek/default.nix2
-rw-r--r--pkgs/applications/audio/split2flac/default.nix2
-rw-r--r--pkgs/applications/audio/spotify-tui/default.nix2
-rw-r--r--pkgs/applications/audio/spotify/default.nix2
-rw-r--r--pkgs/applications/audio/spotifywm/default.nix2
-rw-r--r--pkgs/applications/audio/squeezelite/default.nix2
-rw-r--r--pkgs/applications/audio/squishyball/default.nix2
-rw-r--r--pkgs/applications/audio/ssrc/default.nix2
-rw-r--r--pkgs/applications/audio/stone-phaser/default.nix2
-rw-r--r--pkgs/applications/audio/streamripper/default.nix2
-rw-r--r--pkgs/applications/audio/svox/default.nix2
-rw-r--r--pkgs/applications/audio/swh-lv2/default.nix2
-rw-r--r--pkgs/applications/audio/tambura/default.nix2
-rw-r--r--pkgs/applications/audio/tetraproc/default.nix2
-rw-r--r--pkgs/applications/audio/timemachine/default.nix2
-rw-r--r--pkgs/applications/audio/tony/default.nix2
-rw-r--r--pkgs/applications/audio/transcode/default.nix2
-rw-r--r--pkgs/applications/audio/transcribe/default.nix2
-rw-r--r--pkgs/applications/audio/tree-from-tags/default.nix2
-rw-r--r--pkgs/applications/audio/uade123/default.nix2
-rw-r--r--pkgs/applications/audio/vcv-rack/default.nix2
-rw-r--r--pkgs/applications/audio/vimpc/default.nix2
-rw-r--r--pkgs/applications/audio/vkeybd/default.nix2
-rw-r--r--pkgs/applications/audio/vocal/default.nix2
-rw-r--r--pkgs/applications/audio/vorbis-tools/default.nix4
-rw-r--r--pkgs/applications/audio/waon/default.nix2
-rw-r--r--pkgs/applications/audio/wavegain/default.nix2
-rw-r--r--pkgs/applications/audio/whipper/default.nix2
-rw-r--r--pkgs/applications/audio/wolf-shaper/default.nix2
-rw-r--r--pkgs/applications/audio/x42-avldrums/default.nix2
-rw-r--r--pkgs/applications/audio/x42-gmsynth/default.nix2
-rw-r--r--pkgs/applications/audio/x42-plugins/default.nix2
-rw-r--r--pkgs/applications/audio/yasr/default.nix2
-rw-r--r--pkgs/applications/audio/ympd/default.nix2
-rw-r--r--pkgs/applications/audio/yoshimi/default.nix2
-rw-r--r--pkgs/applications/audio/zam-plugins/default.nix2
-rw-r--r--pkgs/applications/audio/zita-ajbridge/default.nix2
-rw-r--r--pkgs/applications/audio/zita-at1/default.nix2
-rw-r--r--pkgs/applications/audio/zita-njbridge/default.nix2
-rw-r--r--pkgs/applications/audio/zynaddsubfx/default.nix2
283 files changed, 300 insertions, 300 deletions
diff --git a/pkgs/applications/audio/AMB-plugins/default.nix b/pkgs/applications/audio/AMB-plugins/default.nix
index d9a05e0bf660..2e2af8f3a9a2 100644
--- a/pkgs/applications/audio/AMB-plugins/default.nix
+++ b/pkgs/applications/audio/AMB-plugins/default.nix
@@ -25,7 +25,7 @@ stdenv.mkDerivation rec {
       Mono and stereo to B-format panning, horizontal rotator, square, hexagon and cube decoders.
     '';
     version = version;
-    homepage = http://kokkinizita.linuxaudio.org/linuxaudio/ladspa/index.html;
+    homepage = "http://kokkinizita.linuxaudio.org/linuxaudio/ladspa/index.html";
     license = stdenv.lib.licenses.gpl2Plus;
     maintainers = [ stdenv.lib.maintainers.magnetophon ];
     platforms = stdenv.lib.platforms.linux;
diff --git a/pkgs/applications/audio/FIL-plugins/default.nix b/pkgs/applications/audio/FIL-plugins/default.nix
index cf383c1dd495..253e724cd313 100644
--- a/pkgs/applications/audio/FIL-plugins/default.nix
+++ b/pkgs/applications/audio/FIL-plugins/default.nix
@@ -29,7 +29,7 @@ stdenv.mkDerivation rec {
       This should make this plugin a good candidate for use in systems that allow automation of plugin control ports, such as Ardour, or for stage use.
     '';
     version = version;
-    homepage = http://kokkinizita.linuxaudio.org/linuxaudio/ladspa/index.html;
+    homepage = "http://kokkinizita.linuxaudio.org/linuxaudio/ladspa/index.html";
     license = stdenv.lib.licenses.gpl2Plus;
     maintainers = [ stdenv.lib.maintainers.magnetophon ];
     platforms = stdenv.lib.platforms.linux;
diff --git a/pkgs/applications/audio/a2jmidid/default.nix b/pkgs/applications/audio/a2jmidid/default.nix
index 283317200484..64468bddc852 100644
--- a/pkgs/applications/audio/a2jmidid/default.nix
+++ b/pkgs/applications/audio/a2jmidid/default.nix
@@ -18,11 +18,11 @@ in stdenv.mkDerivation {
 
   patches = [
     (fetchpatch {
-      url = https://repo.or.cz/a2jmidid.git/patch/24e3b8e543256ae8fdfb4b75eb9fd775f07c46e2;
+      url = "https://repo.or.cz/a2jmidid.git/patch/24e3b8e543256ae8fdfb4b75eb9fd775f07c46e2";
       sha256 = "1nxrvnhxlgqc9wbxnp1gnpw4wjyzxvymwcg1gh2nqzmssgfykfkc";
     })
     (fetchpatch {
-      url = https://repo.or.cz/a2jmidid.git/patch/7f82da7eb2f540a94db23331be98d42a58ddc269;
+      url = "https://repo.or.cz/a2jmidid.git/patch/7f82da7eb2f540a94db23331be98d42a58ddc269";
       sha256 = "1nab9zf0agbcj5pvhl90pz0cx1d204d4janqflc5ymjhy8jyrsdv";
     })
   ];
diff --git a/pkgs/applications/audio/aacgain/default.nix b/pkgs/applications/audio/aacgain/default.nix
index 5892351225d3..194514c65b53 100644
--- a/pkgs/applications/audio/aacgain/default.nix
+++ b/pkgs/applications/audio/aacgain/default.nix
@@ -55,7 +55,7 @@ stdenv.mkDerivation {
 
   meta = with stdenv.lib; {
     description = "ReplayGain for AAC files";
-    homepage = https://aacgain.altosdesign.com;
+    homepage = "https://aacgain.altosdesign.com";
     license = licenses.gpl2;
     platforms = platforms.linux;
     maintainers = [ maintainers.robbinch ];
diff --git a/pkgs/applications/audio/abcde/default.nix b/pkgs/applications/audio/abcde/default.nix
index adb38d4bbbab..4cb28e512a72 100644
--- a/pkgs/applications/audio/abcde/default.nix
+++ b/pkgs/applications/audio/abcde/default.nix
@@ -46,7 +46,7 @@ in
     '';
 
     meta = with stdenv.lib; {
-      homepage = http://abcde.einval.com/wiki/;
+      homepage = "http://abcde.einval.com/wiki/";
       license = licenses.gpl2Plus;
       maintainers = with maintainers; [ gebner ];
       description = "Command-line audio CD ripper";
diff --git a/pkgs/applications/audio/airwave/default.nix b/pkgs/applications/audio/airwave/default.nix
index 1d91ad4d2be1..176d1d4cfb37 100644
--- a/pkgs/applications/audio/airwave/default.nix
+++ b/pkgs/applications/audio/airwave/default.nix
@@ -83,7 +83,7 @@ multiStdenv.mkDerivation {
       protocol to correctly embed the plugin editor into the host
       window.
     '';
-    homepage = https://github.com/phantom-code/airwave;
+    homepage = "https://github.com/phantom-code/airwave";
     license = licenses.mit;
     platforms = [ "x86_64-linux" ];
     maintainers = with maintainers; [ michalrus ];
diff --git a/pkgs/applications/audio/aj-snapshot/default.nix b/pkgs/applications/audio/aj-snapshot/default.nix
index 5c379b57ad6a..f781aad905d0 100644
--- a/pkgs/applications/audio/aj-snapshot/default.nix
+++ b/pkgs/applications/audio/aj-snapshot/default.nix
@@ -24,7 +24,7 @@ stdenv.mkDerivation rec {
     You can also run aj-snapshot in daemon mode if you want to have your connections continually restored.
     '';
 
-    homepage = http://aj-snapshot.sourceforge.net/;
+    homepage = "http://aj-snapshot.sourceforge.net/";
     license = licenses.gpl2;
     maintainers = [ maintainers.mrVanDalo ];
     platforms = platforms.all;
diff --git a/pkgs/applications/audio/amarok/default.nix b/pkgs/applications/audio/amarok/default.nix
index cd951701e771..25fceb357cc5 100644
--- a/pkgs/applications/audio/amarok/default.nix
+++ b/pkgs/applications/audio/amarok/default.nix
@@ -14,7 +14,7 @@ mkDerivation rec {
     # master has the Qt5 version as of April 2018 but a formal release has not
     # yet been made so change this back to the proper upstream when such a
     # release is out
-    url    = git://anongit.kde.org/amarok.git;
+    url    = "git://anongit.kde.org/amarok.git";
     # url = "mirror://kde/stable/${pname}/${version}/src/${name}.tar.xz";
     rev    = "457fbda25a85a102bfda92aa7137e7ef5e4c8b00";
     sha256 = "1ig2mg8pqany6m2zplkrvldcv4ibxwsypnyv5igm7nz7ax82cd5j";
diff --git a/pkgs/applications/audio/ardour/default.nix b/pkgs/applications/audio/ardour/default.nix
index c1749029cdc9..8c55c29b5273 100644
--- a/pkgs/applications/audio/ardour/default.nix
+++ b/pkgs/applications/audio/ardour/default.nix
@@ -83,7 +83,7 @@ stdenv.mkDerivation rec {
       Please consider supporting the ardour project financially:
       https://community.ardour.org/node/8288
     '';
-    homepage = http://ardour.org/;
+    homepage = "http://ardour.org/";
     license = licenses.gpl2;
     platforms = platforms.linux;
     maintainers = [ maintainers.goibhniu maintainers.fps ];
diff --git a/pkgs/applications/audio/ario/default.nix b/pkgs/applications/audio/ario/default.nix
index 4b48f5f1eea2..99a09e7ee330 100644
--- a/pkgs/applications/audio/ario/default.nix
+++ b/pkgs/applications/audio/ario/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "GTK client for MPD (Music player daemon)";
-    homepage = http://ario-player.sourceforge.net/;
+    homepage = "http://ario-player.sourceforge.net/";
     license = stdenv.lib.licenses.gpl2Plus;
     maintainers = [ stdenv.lib.maintainers.garrison ];
     platforms = stdenv.lib.platforms.all;
diff --git a/pkgs/applications/audio/artyFX/default.nix b/pkgs/applications/audio/artyFX/default.nix
index 4b76ebdf6053..0265e0f75ecb 100644
--- a/pkgs/applications/audio/artyFX/default.nix
+++ b/pkgs/applications/audio/artyFX/default.nix
@@ -15,7 +15,7 @@ stdenv.mkDerivation rec {
   buildInputs = [ cairomm cmake libjack2 libpthreadstubs libXdmcp libxshmfence libsndfile lv2 ntk   ];
 
   meta = with stdenv.lib; {
-    homepage = http://openavproductions.com/artyfx/;
+    homepage = "http://openavproductions.com/artyfx/";
     description = "A LV2 plugin bundle of artistic realtime effects";
     license = licenses.gpl2;
     maintainers = [ maintainers.magnetophon ];
diff --git a/pkgs/applications/audio/asunder/default.nix b/pkgs/applications/audio/asunder/default.nix
index 5a0b6797a241..7d90ac36f366 100644
--- a/pkgs/applications/audio/asunder/default.nix
+++ b/pkgs/applications/audio/asunder/default.nix
@@ -38,7 +38,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "A graphical Audio CD ripper and encoder for Linux";
-    homepage = http://littlesvr.ca/asunder/index.php;
+    homepage = "http://littlesvr.ca/asunder/index.php";
     license = licenses.gpl2;
     maintainers = with maintainers; [ mudri ];
     platforms = platforms.linux;
diff --git a/pkgs/applications/audio/audacious/default.nix b/pkgs/applications/audio/audacious/default.nix
index 12e8237d4857..b06175f37f31 100644
--- a/pkgs/applications/audio/audacious/default.nix
+++ b/pkgs/applications/audio/audacious/default.nix
@@ -60,7 +60,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Audio player";
-    homepage = https://audacious-media-player.org/;
+    homepage = "https://audacious-media-player.org/";
     maintainers = with maintainers; [ eelco ramkromberg ];
     platforms = with platforms; linux;
     license = with licenses; [
diff --git a/pkgs/applications/audio/audacious/qt-5.nix b/pkgs/applications/audio/audacious/qt-5.nix
index baf7b108e504..45525571a646 100644
--- a/pkgs/applications/audio/audacious/qt-5.nix
+++ b/pkgs/applications/audio/audacious/qt-5.nix
@@ -81,7 +81,7 @@ mkDerivation {
 
   meta = with lib; {
     description = "Audio player";
-    homepage = https://audacious-media-player.org/;
+    homepage = "https://audacious-media-player.org/";
     maintainers = with maintainers; [ ttuegel ];
     platforms = with platforms; linux;
     license = with licenses; [
diff --git a/pkgs/applications/audio/audacity/default.nix b/pkgs/applications/audio/audacity/default.nix
index 57e0c52e6406..a1f4b9ad950a 100644
--- a/pkgs/applications/audio/audacity/default.nix
+++ b/pkgs/applications/audio/audacity/default.nix
@@ -57,7 +57,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Sound editor with graphical UI";
-    homepage = http://audacityteam.org/;
+    homepage = "http://audacityteam.org/";
     license = licenses.gpl2Plus;
     platforms = intersectLists platforms.linux platforms.x86; # fails on ARM
     maintainers = with maintainers; [ the-kenny ];
diff --git a/pkgs/applications/audio/audio-recorder/default.nix b/pkgs/applications/audio/audio-recorder/default.nix
index 534b87e9fa74..eee293b76c2f 100644
--- a/pkgs/applications/audio/audio-recorder/default.nix
+++ b/pkgs/applications/audio/audio-recorder/default.nix
@@ -36,7 +36,7 @@ stdenv.mkDerivation rec {
       automatically record your Skype calls. It supports several audio (output)
       formats such as OGG audio, Flac, MP3 and WAV.
     '';
-    homepage = https://launchpad.net/~audio-recorder;
+    homepage = "https://launchpad.net/~audio-recorder";
     license = licenses.gpl3;
     platforms = platforms.linux;
     maintainers = [ maintainers.msteen ];
diff --git a/pkgs/applications/audio/aumix/default.nix b/pkgs/applications/audio/aumix/default.nix
index db5f081c4ed4..5bc7f8432582 100644
--- a/pkgs/applications/audio/aumix/default.nix
+++ b/pkgs/applications/audio/aumix/default.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
       Aumix adjusts an audio mixer from X, the console, a terminal,
       the command line or a script.
     '';
-    homepage = http://www.jpj.net/~trevor/aumix.html;
+    homepage = "http://www.jpj.net/~trevor/aumix.html";
     license = stdenv.lib.licenses.gpl2Plus;
 
     maintainers = [ ];
diff --git a/pkgs/applications/audio/axoloti/default.nix b/pkgs/applications/audio/axoloti/default.nix
index fb9b3c9513f8..3d907e421b3e 100644
--- a/pkgs/applications/audio/axoloti/default.nix
+++ b/pkgs/applications/audio/axoloti/default.nix
@@ -88,7 +88,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = with stdenv.lib; {
-    homepage = http://www.axoloti.com;
+    homepage = "http://www.axoloti.com";
     description = ''
       Sketching embedded digital audio algorithms.
 
diff --git a/pkgs/applications/audio/axoloti/dfu-util.nix b/pkgs/applications/audio/axoloti/dfu-util.nix
index e9fa6daecfe3..80ec696c6459 100644
--- a/pkgs/applications/audio/axoloti/dfu-util.nix
+++ b/pkgs/applications/audio/axoloti/dfu-util.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation rec {
       phones. With dfu-util you are able to download firmware to your device or
       upload firmware from it.
     '';
-    homepage = http://dfu-util.sourceforge.net;
+    homepage = "http://dfu-util.sourceforge.net";
     license = licenses.gpl2Plus;
     platforms = platforms.unix;
     maintainers = [ ];
diff --git a/pkgs/applications/audio/axoloti/libusb1.nix b/pkgs/applications/audio/axoloti/libusb1.nix
index 1a6ebd346cca..49b788f66537 100644
--- a/pkgs/applications/audio/axoloti/libusb1.nix
+++ b/pkgs/applications/audio/axoloti/libusb1.nix
@@ -30,7 +30,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = with stdenv.lib; {
-    homepage = http://www.libusb.info;
+    homepage = "http://www.libusb.info";
     description = "User-space USB library";
     platforms = platforms.unix;
     license = licenses.lgpl21;
diff --git a/pkgs/applications/audio/baudline/default.nix b/pkgs/applications/audio/baudline/default.nix
index c35df95b24c7..0d95675d1e67 100644
--- a/pkgs/applications/audio/baudline/default.nix
+++ b/pkgs/applications/audio/baudline/default.nix
@@ -59,7 +59,7 @@ stdenv.mkDerivation rec {
       displays, and continuous capture tools for hunting down and studying
       elusive signal characteristics.
     '';
-    homepage = http://www.baudline.com/;
+    homepage = "http://www.baudline.com/";
     # See http://www.baudline.com/faq.html#licensing_terms.
     # (Do NOT (re)distribute on hydra.)
     license = licenses.unfree;
diff --git a/pkgs/applications/audio/bitmeter/default.nix b/pkgs/applications/audio/bitmeter/default.nix
index 6f471f3a0283..ac05a9367cc9 100644
--- a/pkgs/applications/audio/bitmeter/default.nix
+++ b/pkgs/applications/audio/bitmeter/default.nix
@@ -14,13 +14,13 @@ stdenv.mkDerivation rec {
 
   patches = [
     (fetchurl {
-      url = https://gitweb.gentoo.org/repo/gentoo.git/plain/media-sound/bitmeter/files/bitmeter-1.2-fix-build-system.patch;
+      url = "https://gitweb.gentoo.org/repo/gentoo.git/plain/media-sound/bitmeter/files/bitmeter-1.2-fix-build-system.patch";
       sha256 = "021mz6933iw7mpk6b9cbjr8naj6smbq1hwqjszlyx72qbwrrid7k";
     })
   ];
 
   meta = with stdenv.lib; {
-    homepage = http://devel.tlrmx.org/audio/bitmeter/;
+    homepage = "http://devel.tlrmx.org/audio/bitmeter/";
     description = "Also known as jack bitscope. Useful to detect denormals";
     license = licenses.gpl2;
     maintainers = [ maintainers.magnetophon ];
diff --git a/pkgs/applications/audio/bitwig-studio/bitwig-studio1.nix b/pkgs/applications/audio/bitwig-studio/bitwig-studio1.nix
index 835868471906..910c1cfe51b5 100644
--- a/pkgs/applications/audio/bitwig-studio/bitwig-studio1.nix
+++ b/pkgs/applications/audio/bitwig-studio/bitwig-studio1.nix
@@ -90,7 +90,7 @@ stdenv.mkDerivation rec {
       production, performance and DJing, with a focus on flexible
       editing tools and a super-fast workflow.
     '';
-    homepage = https://www.bitwig.com/;
+    homepage = "https://www.bitwig.com/";
     license = licenses.unfree;
     platforms = [ "x86_64-linux" ];
     maintainers = with maintainers; [ michalrus mrVanDalo ];
diff --git a/pkgs/applications/audio/bristol/default.nix b/pkgs/applications/audio/bristol/default.nix
index 504900d65955..704b888e2293 100644
--- a/pkgs/applications/audio/bristol/default.nix
+++ b/pkgs/applications/audio/bristol/default.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation  rec {
 
   meta = with stdenv.lib; {
     description = "A range of synthesiser, electric piano and organ emulations";
-    homepage = http://bristol.sourceforge.net;
+    homepage = "http://bristol.sourceforge.net";
     license = licenses.gpl3;
     platforms = ["x86_64-linux" "i686-linux"];
     maintainers = [ maintainers.goibhniu ];
diff --git a/pkgs/applications/audio/bs1770gain/default.nix b/pkgs/applications/audio/bs1770gain/default.nix
index 2dee463aeee2..76a789356193 100644
--- a/pkgs/applications/audio/bs1770gain/default.nix
+++ b/pkgs/applications/audio/bs1770gain/default.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation rec {
   meta = with stdenv.lib; {
     description = "A audio/video loudness scanner implementing ITU-R BS.1770";
     license = licenses.gpl2Plus;
-    homepage = http://bs1770gain.sourceforge.net/;
+    homepage = "http://bs1770gain.sourceforge.net/";
     platforms = platforms.all;
   };
 }
diff --git a/pkgs/applications/audio/bsequencer/default.nix b/pkgs/applications/audio/bsequencer/default.nix
index b91554f5716e..e63124e85479 100644
--- a/pkgs/applications/audio/bsequencer/default.nix
+++ b/pkgs/applications/audio/bsequencer/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation rec {
   installFlags = [ "PREFIX=$(out)" ];
 
   meta = with stdenv.lib; {
-    homepage = https://github.com/sjaehn/BSEQuencer;
+    homepage = "https://github.com/sjaehn/BSEQuencer";
     description = "Multi channel MIDI step sequencer LV2 plugin";
     maintainers = [ maintainers.magnetophon ];
     platforms = platforms.linux;
diff --git a/pkgs/applications/audio/bshapr/default.nix b/pkgs/applications/audio/bshapr/default.nix
index d2206cf93b5e..a2f96bc288c9 100644
--- a/pkgs/applications/audio/bshapr/default.nix
+++ b/pkgs/applications/audio/bshapr/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation rec {
   installFlags = [ "PREFIX=$(out)" ];
 
   meta = with stdenv.lib; {
-    homepage = https://github.com/sjaehn/BShapr;
+    homepage = "https://github.com/sjaehn/BShapr";
     description = "Beat / envelope shaper LV2 plugin";
     maintainers = [ maintainers.magnetophon ];
     platforms = platforms.linux;
diff --git a/pkgs/applications/audio/bslizr/default.nix b/pkgs/applications/audio/bslizr/default.nix
index 97a9d60ec277..d97381a7a069 100644
--- a/pkgs/applications/audio/bslizr/default.nix
+++ b/pkgs/applications/audio/bslizr/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation rec {
   installFlags = [ "PREFIX=$(out)" ];
 
   meta = with stdenv.lib; {
-    homepage = https://github.com/sjaehn/BSlizr;
+    homepage = "https://github.com/sjaehn/BSlizr";
     description = "Sequenced audio slicing effect LV2 plugin (step sequencer effect)";
     maintainers = [ maintainers.magnetophon ];
     platforms = platforms.linux;
diff --git a/pkgs/applications/audio/cadence/default.nix b/pkgs/applications/audio/cadence/default.nix
index 7aa2872224d7..4f4ad4b8c5b0 100644
--- a/pkgs/applications/audio/cadence/default.nix
+++ b/pkgs/applications/audio/cadence/default.nix
@@ -91,7 +91,7 @@ mkDerivation rec {
   '') scriptAndSource;
 
   meta = {
-    homepage = https://github.com/falkTX/Cadence/;
+    homepage = "https://github.com/falkTX/Cadence/";
     description = "Collection of tools useful for audio production";
     license = stdenv.lib.licenses.gpl2Plus;
     maintainers = with stdenv.lib.maintainers; [ genesis worldofpeace ];
diff --git a/pkgs/applications/audio/calf/default.nix b/pkgs/applications/audio/calf/default.nix
index 0106e8b45846..bbeef4c395a2 100644
--- a/pkgs/applications/audio/calf/default.nix
+++ b/pkgs/applications/audio/calf/default.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
   ];
 
   meta = with stdenv.lib; {
-    homepage = http://calf-studio-gear.org;
+    homepage = "http://calf-studio-gear.org";
     description = "A set of high quality open source audio plugins for musicians";
     license = licenses.lgpl2;
     maintainers = [ maintainers.goibhniu ];
diff --git a/pkgs/applications/audio/caps/default.nix b/pkgs/applications/audio/caps/default.nix
index eabbf8668375..dc8511bf5007 100644
--- a/pkgs/applications/audio/caps/default.nix
+++ b/pkgs/applications/audio/caps/default.nix
@@ -22,7 +22,7 @@ stdenv.mkDerivation rec {
       considerations are latency-free realtime operation, modesty of
       resource demands and meaningful control interfaces.
     '';
-    homepage = http://www.quitte.de/dsp/caps.html;
+    homepage = "http://www.quitte.de/dsp/caps.html";
     license = stdenv.lib.licenses.gpl3;
     maintainers = [ stdenv.lib.maintainers.astsmtl ];
     platforms = stdenv.lib.platforms.linux;
diff --git a/pkgs/applications/audio/carla/default.nix b/pkgs/applications/audio/carla/default.nix
index 6641e99e4917..2b794b98f88b 100644
--- a/pkgs/applications/audio/carla/default.nix
+++ b/pkgs/applications/audio/carla/default.nix
@@ -68,7 +68,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = with stdenv.lib; {
-    homepage = http://kxstudio.sf.net/carla;
+    homepage = "http://kxstudio.sf.net/carla";
     description = "An audio plugin host";
     longDescription = ''
       It currently supports LADSPA (including LRDF), DSSI, LV2, VST2/3
diff --git a/pkgs/applications/audio/caudec/default.nix b/pkgs/applications/audio/caudec/default.nix
index 1ab39311258b..c95390958637 100644
--- a/pkgs/applications/audio/caudec/default.nix
+++ b/pkgs/applications/audio/caudec/default.nix
@@ -31,7 +31,7 @@ stdenv.mkDerivation {
   '';
 
    meta = with stdenv.lib; {
-    homepage = http://caudec.net/;
+    homepage = "http://caudec.net/";
     description = "A multiprocess audio converter that supports many formats (FLAC, MP3, Ogg Vorbis, Windows codecs and many more)";
     license     = licenses.gpl3;
     platforms   = platforms.linux ++ platforms.darwin;
diff --git a/pkgs/applications/audio/cava/default.nix b/pkgs/applications/audio/cava/default.nix
index 5c5c262056ec..2bdca386bf45 100644
--- a/pkgs/applications/audio/cava/default.nix
+++ b/pkgs/applications/audio/cava/default.nix
@@ -30,7 +30,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Console-based Audio Visualizer for Alsa";
-    homepage = https://github.com/karlstav/cava;
+    homepage = "https://github.com/karlstav/cava";
     license = licenses.mit;
     maintainers = with maintainers; [ offline mirrexagon ];
     platforms = platforms.linux;
diff --git a/pkgs/applications/audio/cd-discid/default.nix b/pkgs/applications/audio/cd-discid/default.nix
index 864e04d88f3c..2ceb5f6d09a2 100644
--- a/pkgs/applications/audio/cd-discid/default.nix
+++ b/pkgs/applications/audio/cd-discid/default.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation rec {
     ++ stdenv.lib.optional stdenv.isDarwin IOKit;
 
   meta = with stdenv.lib; {
-    homepage = http://linukz.org/cd-discid.shtml;
+    homepage = "http://linukz.org/cd-discid.shtml";
     license = licenses.gpl2Plus;
     maintainers = [ maintainers.rycee ];
     platforms = platforms.unix;
diff --git a/pkgs/applications/audio/cdparanoia/default.nix b/pkgs/applications/audio/cdparanoia/default.nix
index 4e517ee636e8..0658305723c4 100644
--- a/pkgs/applications/audio/cdparanoia/default.nix
+++ b/pkgs/applications/audio/cdparanoia/default.nix
@@ -35,7 +35,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = with stdenv.lib; {
-    homepage = https://xiph.org/paranoia;
+    homepage = "https://xiph.org/paranoia";
     description = "A tool and library for reading digital audio from CDs";
     license = with licenses; [ gpl2Plus lgpl21Plus ];
     platforms = platforms.unix;
diff --git a/pkgs/applications/audio/chuck/default.nix b/pkgs/applications/audio/chuck/default.nix
index 04b31ae2c0b3..6970296cbd99 100644
--- a/pkgs/applications/audio/chuck/default.nix
+++ b/pkgs/applications/audio/chuck/default.nix
@@ -33,7 +33,7 @@ stdenv.mkDerivation rec {
 
   meta = with lib; {
     description = "Programming language for real-time sound synthesis and music creation";
-    homepage = http://chuck.cs.princeton.edu;
+    homepage = "http://chuck.cs.princeton.edu";
     license = licenses.gpl2;
     platforms = platforms.unix;
     maintainers = with maintainers; [ ftrvxmtrx ];
diff --git a/pkgs/applications/audio/clementine/default.nix b/pkgs/applications/audio/clementine/default.nix
index 479f2a16fd8a..4a32b099d15b 100644
--- a/pkgs/applications/audio/clementine/default.nix
+++ b/pkgs/applications/audio/clementine/default.nix
@@ -91,7 +91,7 @@ let
     '';
 
     meta = with stdenv.lib; {
-      homepage = http://www.clementine-player.org;
+      homepage = "http://www.clementine-player.org";
       description = "A multiplatform music player";
       license = licenses.gpl3Plus;
       platforms = platforms.linux;
@@ -130,7 +130,7 @@ let
     '';
     enableParallelBuilding = true;
     meta = with stdenv.lib; {
-      homepage = http://www.clementine-player.org;
+      homepage = "http://www.clementine-player.org";
       description = "Spotify integration for Clementine";
       # The blob itself is Apache-licensed, although libspotify is unfree.
       license = licenses.asl20;
diff --git a/pkgs/applications/audio/clerk/default.nix b/pkgs/applications/audio/clerk/default.nix
index 4da2228c6c13..3c78295db674 100644
--- a/pkgs/applications/audio/clerk/default.nix
+++ b/pkgs/applications/audio/clerk/default.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation {
 
   meta = with stdenv.lib; {
     description = "An MPD client built on top of rofi";
-    homepage    = https://github.com/carnager/clerk;
+    homepage    = "https://github.com/carnager/clerk";
     license     = licenses.mit;
     maintainers = with maintainers; [ anderspapitto ];
   };
diff --git a/pkgs/applications/audio/cmus/default.nix b/pkgs/applications/audio/cmus/default.nix
index 023e35bd7870..3e5916ba0983 100644
--- a/pkgs/applications/audio/cmus/default.nix
+++ b/pkgs/applications/audio/cmus/default.nix
@@ -128,7 +128,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Small, fast and powerful console music player for Linux and *BSD";
-    homepage = https://cmus.github.io/;
+    homepage = "https://cmus.github.io/";
     license = licenses.gpl2;
     maintainers = [ maintainers.oxij ];
     platforms = platforms.linux ++ platforms.darwin;
diff --git a/pkgs/applications/audio/cmusfm/default.nix b/pkgs/applications/audio/cmusfm/default.nix
index 54f1050da466..6695b9a7237c 100644
--- a/pkgs/applications/audio/cmusfm/default.nix
+++ b/pkgs/applications/audio/cmusfm/default.nix
@@ -28,7 +28,7 @@ stdenv.mkDerivation {
       + run `cmusfm init` to generate configuration file under ~/.config/cmus/cmusfm.conf
       + Inside cmus run `:set status_display_program=cmusfm` to set up cmusfm
     '';
-    homepage = https://github.com/Arkq/cmusfm/;
+    homepage = "https://github.com/Arkq/cmusfm/";
     maintainers = with stdenv.lib.maintainers; [ CharlesHD ];
     license = licenses.gpl3Plus;
     platforms = platforms.linux ++ platforms.darwin;
diff --git a/pkgs/applications/audio/cozy-audiobooks/default.nix b/pkgs/applications/audio/cozy-audiobooks/default.nix
index 865bc130db91..a5947bd37f19 100644
--- a/pkgs/applications/audio/cozy-audiobooks/default.nix
+++ b/pkgs/applications/audio/cozy-audiobooks/default.nix
@@ -75,7 +75,7 @@ python3Packages.buildPythonApplication rec {
 
   meta = with stdenv.lib; {
     description = "A modern audio book player for Linux using GTK 3";
-    homepage = https://cozy.geigi.de/;
+    homepage = "https://cozy.geigi.de/";
     maintainers = [ maintainers.makefu ];
     license = licenses.gpl3;
   };
diff --git a/pkgs/applications/audio/crip/default.nix b/pkgs/applications/audio/crip/default.nix
index f7bf919c2212..0181ede26dda 100644
--- a/pkgs/applications/audio/crip/default.nix
+++ b/pkgs/applications/audio/crip/default.nix
@@ -58,7 +58,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = {
-    homepage = http://bach.dynet.com/crip/;
+    homepage = "http://bach.dynet.com/crip/";
     description = "Terminal-based ripper/encoder/tagger tool for creating Ogg Vorbis/FLAC files";
     license = stdenv.lib.licenses.gpl1;
     platforms = stdenv.lib.platforms.linux;
diff --git a/pkgs/applications/audio/csa/default.nix b/pkgs/applications/audio/csa/default.nix
index 0b8afada0206..756c21892fb2 100644
--- a/pkgs/applications/audio/csa/default.nix
+++ b/pkgs/applications/audio/csa/default.nix
@@ -14,7 +14,7 @@ stdenv.mkDerivation rec {
   postInstall = "rm $out/lib/ladspa/celllm_3890.*";
 
   meta = with stdenv.lib; {
-    homepage = https://sourceforge.net/projects/csa/;
+    homepage = "https://sourceforge.net/projects/csa/";
     description = "A group of LADSPA Audio plugins for FM broadcast and more";
     longDescription = ''
       CSA means : Contrôle Signal Audio.
diff --git a/pkgs/applications/audio/csound/csound-qt/default.nix b/pkgs/applications/audio/csound/csound-qt/default.nix
index d16d93318216..895609d3c023 100644
--- a/pkgs/applications/audio/csound/csound-qt/default.nix
+++ b/pkgs/applications/audio/csound/csound-qt/default.nix
@@ -42,7 +42,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "CsoundQt is a frontend for Csound with editor, integrated help, widgets and other features.";
-    homepage = https://csoundqt.github.io/;
+    homepage = "https://csoundqt.github.io/";
     license = licenses.gpl2;
     platforms = platforms.linux;
     maintainers = with maintainers; [ hlolli ];
diff --git a/pkgs/applications/audio/csound/default.nix b/pkgs/applications/audio/csound/default.nix
index 758448c2fb33..4b426609fea4 100644
--- a/pkgs/applications/audio/csound/default.nix
+++ b/pkgs/applications/audio/csound/default.nix
@@ -42,7 +42,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Sound design, audio synthesis, and signal processing system, providing facilities for music composition and performance on all major operating systems and platforms";
-    homepage = http://www.csounds.com/;
+    homepage = "http://www.csounds.com/";
     license = licenses.gpl2;
     maintainers = [maintainers.marcweber];
     platforms = platforms.linux;
diff --git a/pkgs/applications/audio/deadbeef/plugins/headerbar-gtk3.nix b/pkgs/applications/audio/deadbeef/plugins/headerbar-gtk3.nix
index b26360f0c469..337d570a9353 100644
--- a/pkgs/applications/audio/deadbeef/plugins/headerbar-gtk3.nix
+++ b/pkgs/applications/audio/deadbeef/plugins/headerbar-gtk3.nix
@@ -22,7 +22,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Plug-in that adds GTK 3 header bar to the DeaDBeeF music player";
-    homepage = https://github.com/saivert/ddb_misc_headerbar_GTK3;
+    homepage = "https://github.com/saivert/ddb_misc_headerbar_GTK3";
     license = licenses.gpl2Plus;
     maintainers = [ maintainers.jtojnar ];
     platforms = platforms.linux;
diff --git a/pkgs/applications/audio/deadbeef/plugins/infobar.nix b/pkgs/applications/audio/deadbeef/plugins/infobar.nix
index 8a81101983f7..294d3a0ad8bf 100644
--- a/pkgs/applications/audio/deadbeef/plugins/infobar.nix
+++ b/pkgs/applications/audio/deadbeef/plugins/infobar.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation rec {
   meta = with stdenv.lib; {
     broken = true; # crashes DeaDBeeF and is abandoned (https://bitbucket.org/dsimbiriatin/deadbeef-infobar/issues/38/infobar-causes-deadbeef-180-to-crash)
     description = "DeaDBeeF Infobar Plugin";
-    homepage = https://bitbucket.org/dsimbiriatin/deadbeef-infobar;
+    homepage = "https://bitbucket.org/dsimbiriatin/deadbeef-infobar";
     license = licenses.gpl2Plus;
     maintainers = [ maintainers.jtojnar ];
     platforms = platforms.linux;
diff --git a/pkgs/applications/audio/deadbeef/plugins/mpris2.nix b/pkgs/applications/audio/deadbeef/plugins/mpris2.nix
index 5b27f3c3f323..95606a869b7f 100644
--- a/pkgs/applications/audio/deadbeef/plugins/mpris2.nix
+++ b/pkgs/applications/audio/deadbeef/plugins/mpris2.nix
@@ -15,7 +15,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "MPRISv2 plugin for the DeaDBeeF music player";
-    homepage = https://github.com/Serranya/deadbeef-mpris2-plugin/;
+    homepage = "https://github.com/Serranya/deadbeef-mpris2-plugin/";
     license = licenses.gpl2;
     platforms = platforms.linux;
     maintainers = [ maintainers.abbradar ];
diff --git a/pkgs/applications/audio/denemo/default.nix b/pkgs/applications/audio/denemo/default.nix
index f3adec4fece2..1438b066061d 100644
--- a/pkgs/applications/audio/denemo/default.nix
+++ b/pkgs/applications/audio/denemo/default.nix
@@ -33,7 +33,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Music notation and composition software used with lilypond";
-    homepage = http://denemo.org;
+    homepage = "http://denemo.org";
     license = licenses.gpl3;
     platforms = platforms.linux;
     maintainers = [ maintainers.olynch ];
diff --git a/pkgs/applications/audio/dfasma/default.nix b/pkgs/applications/audio/dfasma/default.nix
index 1785ca60060c..7965cbd83fdb 100644
--- a/pkgs/applications/audio/dfasma/default.nix
+++ b/pkgs/applications/audio/dfasma/default.nix
@@ -59,7 +59,7 @@ in stdenv.mkDerivation rec {
       there are basic functionalities to align the signals in time and
       amplitude, this software does not aim to be an audio editor.
     '';
-    homepage = http://gillesdegottex.github.io/dfasma/;
+    homepage = "http://gillesdegottex.github.io/dfasma/";
     license = [ licenses.gpl3Plus reaperFork.meta.license ];
     platforms = platforms.linux;
   };
diff --git a/pkgs/applications/audio/dirt/default.nix b/pkgs/applications/audio/dirt/default.nix
index 1fcdda408966..5e0cf3616fe5 100644
--- a/pkgs/applications/audio/dirt/default.nix
+++ b/pkgs/applications/audio/dirt/default.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation {
 
   meta = with stdenv.lib; {
     description = "An unimpressive thingie for playing bits of samples with some level of accuracy";
-    homepage = https://github.com/tidalcycles/Dirt;
+    homepage = "https://github.com/tidalcycles/Dirt";
     license = licenses.gpl3;
     maintainers = with maintainers; [ anderspapitto ];
     platforms = with platforms; linux;
diff --git a/pkgs/applications/audio/distrho/default.nix b/pkgs/applications/audio/distrho/default.nix
index 36f7dcc5993f..0f651f47a488 100644
--- a/pkgs/applications/audio/distrho/default.nix
+++ b/pkgs/applications/audio/distrho/default.nix
@@ -40,7 +40,7 @@ in stdenv.mkDerivation rec {
   makeFlags = [ "PREFIX=$(out)" ];
 
   meta = with stdenv.lib; {
-    homepage = http://distrho.sourceforge.net;
+    homepage = "http://distrho.sourceforge.net";
     description = "A collection of cross-platform audio effects and plugins";
     longDescription = ''
       Includes:
diff --git a/pkgs/applications/audio/dr14_tmeter/default.nix b/pkgs/applications/audio/dr14_tmeter/default.nix
index ea0ce8cb5f30..fbf25384eef2 100644
--- a/pkgs/applications/audio/dr14_tmeter/default.nix
+++ b/pkgs/applications/audio/dr14_tmeter/default.nix
@@ -23,7 +23,7 @@ python3Packages.buildPythonApplication rec {
   meta = with stdenv.lib; {
     description = "Compute the DR14 of a given audio file according to the procedure described by the Pleasurize Music Foundation";
     license = licenses.gpl3Plus;
-    homepage = http://dr14tmeter.sourceforge.net/;
+    homepage = "http://dr14tmeter.sourceforge.net/";
     maintainers = [ maintainers.adisbladis ];
   };
 }
diff --git a/pkgs/applications/audio/dragonfly-reverb/default.nix b/pkgs/applications/audio/dragonfly-reverb/default.nix
index 1ce7115ad85b..99c07ba8f5fe 100644
--- a/pkgs/applications/audio/dragonfly-reverb/default.nix
+++ b/pkgs/applications/audio/dragonfly-reverb/default.nix
@@ -34,7 +34,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = with stdenv.lib; {
-    homepage = https://github.com/michaelwillis/dragonfly-reverb;
+    homepage = "https://github.com/michaelwillis/dragonfly-reverb";
     description = "A hall-style reverb based on freeverb3 algorithms";
     maintainers = [ maintainers.magnetophon ];
     license = licenses.gpl3;
diff --git a/pkgs/applications/audio/drumgizmo/default.nix b/pkgs/applications/audio/drumgizmo/default.nix
index 2581f223c91d..454befd55f9d 100644
--- a/pkgs/applications/audio/drumgizmo/default.nix
+++ b/pkgs/applications/audio/drumgizmo/default.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "An LV2 sample based drum plugin";
-    homepage = https://www.drumgizmo.org;
+    homepage = "https://www.drumgizmo.org";
     license = licenses.lgpl3;
     platforms = platforms.linux;
     maintainers = [ maintainers.goibhniu maintainers.nico202 ];
diff --git a/pkgs/applications/audio/easytag/default.nix b/pkgs/applications/audio/easytag/default.nix
index 4c2b97e727f4..3f294342da70 100644
--- a/pkgs/applications/audio/easytag/default.nix
+++ b/pkgs/applications/audio/easytag/default.nix
@@ -33,7 +33,7 @@ in stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "View and edit tags for various audio files";
-    homepage = https://wiki.gnome.org/Apps/EasyTAG;
+    homepage = "https://wiki.gnome.org/Apps/EasyTAG";
     license = licenses.gpl2Plus;
     maintainers = with maintainers; [ ];
     platforms = platforms.linux;
diff --git a/pkgs/applications/audio/ecasound/default.nix b/pkgs/applications/audio/ecasound/default.nix
index c17f6b745b37..13c48fc12af3 100644
--- a/pkgs/applications/audio/ecasound/default.nix
+++ b/pkgs/applications/audio/ecasound/default.nix
@@ -27,6 +27,6 @@ stdenv.mkDerivation rec {
   meta = {
     description = "Ecasound is a software package designed for multitrack audio processing";
     license = with stdenv.lib.licenses;  [ gpl2 lgpl21 ];
-    homepage = http://nosignal.fi/ecasound/;
+    homepage = "http://nosignal.fi/ecasound/";
   };
 }
diff --git a/pkgs/applications/audio/eflite/default.nix b/pkgs/applications/audio/eflite/default.nix
index 2338c0ed376e..f9a579512cab 100644
--- a/pkgs/applications/audio/eflite/default.nix
+++ b/pkgs/applications/audio/eflite/default.nix
@@ -36,7 +36,7 @@ stdenv.mkDerivation rec {
   CFLAGS = stdenv.lib.optionalString debug " -DDEBUG=2";
 
   meta = {
-    homepage = http://eflite.sourceforge.net;
+    homepage = "http://eflite.sourceforge.net";
     description = "EFlite is a speech server for screen readers";
     longDescription = ''
       EFlite is a speech server for Emacspeak and other screen
diff --git a/pkgs/applications/audio/ensemble-chorus/default.nix b/pkgs/applications/audio/ensemble-chorus/default.nix
index 5940203d04d1..e2413a4fe87f 100644
--- a/pkgs/applications/audio/ensemble-chorus/default.nix
+++ b/pkgs/applications/audio/ensemble-chorus/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation rec {
   ];
 
   meta = with stdenv.lib; {
-    homepage = https://github.com/jpcima/ensemble-chorus;
+    homepage = "https://github.com/jpcima/ensemble-chorus";
     description = "Digital model of electronic string ensemble chorus";
     maintainers = [ maintainers.magnetophon ];
     platforms = platforms.linux;
diff --git a/pkgs/applications/audio/eq10q/default.nix b/pkgs/applications/audio/eq10q/default.nix
index b4ad15053204..cc3a3c9ac1f5 100644
--- a/pkgs/applications/audio/eq10q/default.nix
+++ b/pkgs/applications/audio/eq10q/default.nix
@@ -14,7 +14,7 @@ stdenv.mkDerivation rec {
   patches = [
     (fetchpatch {
       # glibc 2.27 compatibility
-      url = https://sources.debian.org/data/main/e/eq10q/2.2~repack0-2.1/debian/patches/05-pow10.patch;
+      url = "https://sources.debian.org/data/main/e/eq10q/2.2~repack0-2.1/debian/patches/05-pow10.patch";
       sha256 = "07b0wf6k4xqgigv4h095bzfaw8r218wa36r9w1817jcys13r6c5r";
     })
   ];
@@ -37,7 +37,7 @@ stdenv.mkDerivation rec {
       64 bits floating point internal audio processing.
       Nice GUI with powerful metering for every plugin.
     '';
-    homepage = http://eq10q.sourceforge.net/;
+    homepage = "http://eq10q.sourceforge.net/";
     license = stdenv.lib.licenses.gpl3;
     maintainers = [ stdenv.lib.maintainers.magnetophon ];
     platforms = stdenv.lib.platforms.linux;
diff --git a/pkgs/applications/audio/espeak/default.nix b/pkgs/applications/audio/espeak/default.nix
index 6b5101b50b5a..aa68fd5363d6 100644
--- a/pkgs/applications/audio/espeak/default.nix
+++ b/pkgs/applications/audio/espeak/default.nix
@@ -28,7 +28,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Compact open source software speech synthesizer";
-    homepage = http://espeak.sourceforge.net/;
+    homepage = "http://espeak.sourceforge.net/";
     license = licenses.gpl3Plus;
     platforms = platforms.linux;
   };
diff --git a/pkgs/applications/audio/espeak/edit.nix b/pkgs/applications/audio/espeak/edit.nix
index 8d7db50fd323..6bcffcbc5c34 100644
--- a/pkgs/applications/audio/espeak/edit.nix
+++ b/pkgs/applications/audio/espeak/edit.nix
@@ -53,7 +53,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Phoneme editor for espeak";
-    homepage = http://espeak.sourceforge.net/;
+    homepage = "http://espeak.sourceforge.net/";
     license = licenses.gpl3Plus;
     platforms = platforms.linux;
   };
diff --git a/pkgs/applications/audio/eteroj.lv2/default.nix b/pkgs/applications/audio/eteroj.lv2/default.nix
index bbfe1ad5623f..c86e7b5e9ba1 100644
--- a/pkgs/applications/audio/eteroj.lv2/default.nix
+++ b/pkgs/applications/audio/eteroj.lv2/default.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "OSC injection/ejection from/to UDP/TCP/Serial for LV2";
-    homepage = https://open-music-kontrollers.ch/lv2/eteroj;
+    homepage = "https://open-music-kontrollers.ch/lv2/eteroj";
     license = licenses.artistic2;
     maintainers = with maintainers; [ magnetophon ];
   };
diff --git a/pkgs/applications/audio/faust/faust1.nix b/pkgs/applications/audio/faust/faust1.nix
index 687608b43524..64b8e7244311 100644
--- a/pkgs/applications/audio/faust/faust1.nix
+++ b/pkgs/applications/audio/faust/faust1.nix
@@ -17,8 +17,8 @@ let
   };
 
   meta = with stdenv.lib; {
-    homepage = http://faust.grame.fr/;
-    downloadPage = https://sourceforge.net/projects/faudiostream/files/;
+    homepage = "http://faust.grame.fr/";
+    downloadPage = "https://sourceforge.net/projects/faudiostream/files/";
     license = licenses.gpl2;
     platforms = platforms.linux;
     maintainers = with maintainers; [ magnetophon pmahoney ];
diff --git a/pkgs/applications/audio/faust/faust2.nix b/pkgs/applications/audio/faust/faust2.nix
index cca0e21f8358..33df1ce5d4ee 100644
--- a/pkgs/applications/audio/faust/faust2.nix
+++ b/pkgs/applications/audio/faust/faust2.nix
@@ -31,8 +31,8 @@ let
   };
 
   meta = with stdenv.lib; {
-    homepage = http://faust.grame.fr/;
-    downloadPage = https://sourceforge.net/projects/faudiostream/files/;
+    homepage = "http://faust.grame.fr/";
+    downloadPage = "https://sourceforge.net/projects/faudiostream/files/";
     license = licenses.gpl2;
     platforms = platforms.linux;
     maintainers = with maintainers; [ magnetophon pmahoney ];
diff --git a/pkgs/applications/audio/faust/faustlive.nix b/pkgs/applications/audio/faust/faustlive.nix
index 3b6ca9e4053f..90bd8bc60ad0 100644
--- a/pkgs/applications/audio/faust/faustlive.nix
+++ b/pkgs/applications/audio/faust/faustlive.nix
@@ -29,7 +29,7 @@ stdenv.mkDerivation {
       together the convenience of a standalone interpreted language with the
       efficiency of a compiled language. It's ideal for fast prototyping.
     '';
-    homepage = http://faust.grame.fr/;
+    homepage = "http://faust.grame.fr/";
     license = licenses.gpl3;
   };
 }
diff --git a/pkgs/applications/audio/flac/default.nix b/pkgs/applications/audio/flac/default.nix
index df3aa987c3fb..bd8b9bea82b7 100644
--- a/pkgs/applications/audio/flac/default.nix
+++ b/pkgs/applications/audio/flac/default.nix
@@ -15,7 +15,7 @@ stdenv.mkDerivation rec {
   outputs = [ "bin" "dev" "out" "man" "doc" ];
 
   meta = with stdenv.lib; {
-    homepage = https://xiph.org/flac/;
+    homepage = "https://xiph.org/flac/";
     description = "Library and tools for encoding and decoding the FLAC lossless audio file format";
     platforms = platforms.all;
     license = licenses.bsd3;
diff --git a/pkgs/applications/audio/flac123/default.nix b/pkgs/applications/audio/flac123/default.nix
index 19ed23523556..6f13b710effc 100644
--- a/pkgs/applications/audio/flac123/default.nix
+++ b/pkgs/applications/audio/flac123/default.nix
@@ -13,7 +13,7 @@ stdenv.mkDerivation rec {
   buildInputs = [ flac libao libogg popt ];
 
   meta = with stdenv.lib; {
-    homepage = http://flac-tools.sourceforge.net/;
+    homepage = "http://flac-tools.sourceforge.net/";
     description = "A command-line program for playing FLAC audio files";
     license = licenses.gpl2Plus;
     platforms = platforms.all;
diff --git a/pkgs/applications/audio/flacon/default.nix b/pkgs/applications/audio/flacon/default.nix
index eb39309a254c..1da40e754153 100644
--- a/pkgs/applications/audio/flacon/default.nix
+++ b/pkgs/applications/audio/flacon/default.nix
@@ -27,7 +27,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Extracts audio tracks from an audio CD image to separate tracks.";
-    homepage = https://flacon.github.io/;
+    homepage = "https://flacon.github.io/";
     license = licenses.lgpl21;
     platforms = platforms.linux;
     maintainers = with maintainers; [ snglth ];
diff --git a/pkgs/applications/audio/fluidsynth/default.nix b/pkgs/applications/audio/fluidsynth/default.nix
index 8e2895bf8478..9d9772cde29a 100644
--- a/pkgs/applications/audio/fluidsynth/default.nix
+++ b/pkgs/applications/audio/fluidsynth/default.nix
@@ -40,7 +40,7 @@ stdenv.mkDerivation  {
 
   meta = with lib; {
     description = "Real-time software synthesizer based on the SoundFont 2 specifications";
-    homepage    = http://www.fluidsynth.org;
+    homepage    = "http://www.fluidsynth.org";
     license     = licenses.lgpl21Plus;
     maintainers = with maintainers; [ goibhniu lovek323 ];
     platforms   = platforms.unix;
diff --git a/pkgs/applications/audio/fmit/default.nix b/pkgs/applications/audio/fmit/default.nix
index ee45217e4909..114cf5e192ff 100644
--- a/pkgs/applications/audio/fmit/default.nix
+++ b/pkgs/applications/audio/fmit/default.nix
@@ -46,7 +46,7 @@ mkDerivation rec {
       FMIT is a graphical utility for tuning musical instruments, with error
       and volume history, and advanced features.
     '';
-    homepage = http://gillesdegottex.github.io/fmit/;
+    homepage = "http://gillesdegottex.github.io/fmit/";
     license = licenses.gpl3Plus;
     platforms = platforms.linux;
   };
diff --git a/pkgs/applications/audio/fmsynth/default.nix b/pkgs/applications/audio/fmsynth/default.nix
index 248967e06e6f..d957c7ec33d8 100644
--- a/pkgs/applications/audio/fmsynth/default.nix
+++ b/pkgs/applications/audio/fmsynth/default.nix
@@ -41,7 +41,7 @@ stdenv.mkDerivation {
       - Full floating point implementation optimized for SIMD
       - Hard real-time constraints
     '';
-    homepage = https://github.com/Themaister/libfmsynth;
+    homepage = "https://github.com/Themaister/libfmsynth";
     license = stdenv.lib.licenses.mit;
     maintainers = [ stdenv.lib.maintainers.magnetophon ];
     platforms = stdenv.lib.platforms.linux;
diff --git a/pkgs/applications/audio/fomp/default.nix b/pkgs/applications/audio/fomp/default.nix
index 9f7f0b090074..a712eef06501 100644
--- a/pkgs/applications/audio/fomp/default.nix
+++ b/pkgs/applications/audio/fomp/default.nix
@@ -13,7 +13,7 @@ stdenv.mkDerivation rec {
   buildInputs = [ lv2 python2 ];
 
   meta = with stdenv.lib; {
-    homepage = http://drobilla.net/software/fomp/;
+    homepage = "http://drobilla.net/software/fomp/";
     description = "An LV2 port of the MCP, VCO, FIL, and WAH plugins by Fons Adriaensen";
     license = licenses.gpl2;
     maintainers = [ maintainers.magnetophon ];
diff --git a/pkgs/applications/audio/foo-yc20/default.nix b/pkgs/applications/audio/foo-yc20/default.nix
index e514032f44e2..643b648fa88d 100644
--- a/pkgs/applications/audio/foo-yc20/default.nix
+++ b/pkgs/applications/audio/foo-yc20/default.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation {
   meta = {
     broken = true; # see: https://github.com/sampov2/foo-yc20/issues/7
     description = "A Faust implementation of a 1969 designed Yamaha combo organ, the YC-20";
-    homepage = https://github.com/sampov2/foo-yc20;
+    homepage = "https://github.com/sampov2/foo-yc20";
     license     = "BSD";
     maintainers = [ stdenv.lib.maintainers.magnetophon ];
     platforms = stdenv.lib.platforms.linux;
diff --git a/pkgs/applications/audio/freewheeling/default.nix b/pkgs/applications/audio/freewheeling/default.nix
index 34494871f29c..6ee120f3d1a8 100644
--- a/pkgs/applications/audio/freewheeling/default.nix
+++ b/pkgs/applications/audio/freewheeling/default.nix
@@ -44,7 +44,7 @@ stdenv.mkDerivation rec {
         software, released under the GNU GPL license.
     '' ;
 
-    homepage = http://freewheeling.sourceforge.net;
+    homepage = "http://freewheeling.sourceforge.net";
     license = stdenv.lib.licenses.gpl2;
     maintainers = [ stdenv.lib.maintainers.sepi ];
     platforms = stdenv.lib.platforms.linux;
diff --git a/pkgs/applications/audio/game-music-emu/default.nix b/pkgs/applications/audio/game-music-emu/default.nix
index d95b3eea596d..51f895ea2d5f 100644
--- a/pkgs/applications/audio/game-music-emu/default.nix
+++ b/pkgs/applications/audio/game-music-emu/default.nix
@@ -12,7 +12,7 @@ stdenv.mkDerivation rec {
   buildInputs = [ cmake ];
 
   meta = with stdenv.lib; {
-    homepage = https://bitbucket.org/mpyne/game-music-emu/wiki/Home;
+    homepage = "https://bitbucket.org/mpyne/game-music-emu/wiki/Home";
     description = "A collection of video game music file emulators";
     license = licenses.lgpl21Plus;
     platforms = platforms.all;
diff --git a/pkgs/applications/audio/gigedit/default.nix b/pkgs/applications/audio/gigedit/default.nix
index b8ec2d7116f5..08eec3135081 100644
--- a/pkgs/applications/audio/gigedit/default.nix
+++ b/pkgs/applications/audio/gigedit/default.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
   enableParallelBuilding = true;
 
   meta = with stdenv.lib; {
-    homepage = http://www.linuxsampler.org;
+    homepage = "http://www.linuxsampler.org";
     description = "Gigasampler file access library";
     license = licenses.gpl2;
     maintainers = [ maintainers.goibhniu ];
diff --git a/pkgs/applications/audio/gjay/default.nix b/pkgs/applications/audio/gjay/default.nix
index 42285ba4bf86..9e016c68608b 100644
--- a/pkgs/applications/audio/gjay/default.nix
+++ b/pkgs/applications/audio/gjay/default.nix
@@ -17,7 +17,7 @@ stdenv.mkDerivation {
 
   meta = with stdenv.lib; {
     description = "Generates playlists such that each song sounds good following the previous song";
-    homepage = http://gjay.sourceforge.net/;
+    homepage = "http://gjay.sourceforge.net/";
     license = licenses.gpl2;
     maintainers = with maintainers; [ pSub ];
     platforms = with platforms; linux;
diff --git a/pkgs/applications/audio/gmpc/default.nix b/pkgs/applications/audio/gmpc/default.nix
index cae35b625190..7ae02ae38d85 100644
--- a/pkgs/applications/audio/gmpc/default.nix
+++ b/pkgs/applications/audio/gmpc/default.nix
@@ -10,7 +10,7 @@ stdenv.mkDerivation rec {
   libmpd = stdenv.mkDerivation {
     name = "libmpd-11.8.17";
     src = fetchurl {
-      url = http://download.sarine.nl/Programs/gmpc/11.8/libmpd-11.8.17.tar.gz;
+      url = "http://download.sarine.nl/Programs/gmpc/11.8/libmpd-11.8.17.tar.gz";
       sha256 = "10vspwsgr8pwf3qp2bviw6b2l8prgdiswgv7qiqiyr0h1mmk487y";
     };
     patches = [ ./libmpd-11.8.17-remove-strndup.patch ];
@@ -31,7 +31,7 @@ stdenv.mkDerivation rec {
   ];
 
   meta = with stdenv.lib; {
-    homepage = https://gmpclient.org;
+    homepage = "https://gmpclient.org";
     description = "A GTK2 frontend for Music Player Daemon";
     license = licenses.gpl2;
     maintainers = [];
diff --git a/pkgs/applications/audio/gmu/default.nix b/pkgs/applications/audio/gmu/default.nix
index 8446855d190c..bfe9f72d6646 100644
--- a/pkgs/applications/audio/gmu/default.nix
+++ b/pkgs/applications/audio/gmu/default.nix
@@ -24,7 +24,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = {
-    homepage = http://wejp.k.vu/projects/gmu;
+    homepage = "http://wejp.k.vu/projects/gmu";
     description = "Open source music player for portable gaming consoles and handhelds";
     license = stdenv.lib.licenses.gpl2;
   };
diff --git a/pkgs/applications/audio/gnome-podcasts/default.nix b/pkgs/applications/audio/gnome-podcasts/default.nix
index 261750859940..e24bd61693e7 100644
--- a/pkgs/applications/audio/gnome-podcasts/default.nix
+++ b/pkgs/applications/audio/gnome-podcasts/default.nix
@@ -74,7 +74,7 @@ rustPlatform.buildRustPackage rec {
 
   meta = with stdenv.lib; {
     description = "Listen to your favorite podcasts";
-    homepage = https://wiki.gnome.org/Apps/Podcasts;
+    homepage = "https://wiki.gnome.org/Apps/Podcasts";
     license = licenses.gpl3;
     maintainers = gnome3.maintainers;
     platforms = platforms.unix;
diff --git a/pkgs/applications/audio/google-play-music-desktop-player/default.nix b/pkgs/applications/audio/google-play-music-desktop-player/default.nix
index 332f2ca2342e..509d3ddcf751 100644
--- a/pkgs/applications/audio/google-play-music-desktop-player/default.nix
+++ b/pkgs/applications/audio/google-play-music-desktop-player/default.nix
@@ -73,7 +73,7 @@ stdenv.mkDerivation {
   '';
 
   meta = {
-    homepage = https://www.googleplaymusicdesktopplayer.com/;
+    homepage = "https://www.googleplaymusicdesktopplayer.com/";
     description = "A beautiful cross platform Desktop Player for Google Play Music";
     license = stdenv.lib.licenses.mit;
     platforms = [ "x86_64-linux" ];
diff --git a/pkgs/applications/audio/gpodder/default.nix b/pkgs/applications/audio/gpodder/default.nix
index 332a633616cc..1905699e516c 100644
--- a/pkgs/applications/audio/gpodder/default.nix
+++ b/pkgs/applications/audio/gpodder/default.nix
@@ -73,7 +73,7 @@ python3Packages.buildPythonApplication rec {
       gPodder downloads and manages free audio and video content (podcasts)
       for you. Listen directly on your computer or on your mobile devices.
     '';
-    homepage = http://gpodder.org/;
+    homepage = "http://gpodder.org/";
     license = licenses.gpl3;
     platforms = platforms.linux ++ platforms.darwin;
     maintainers = with maintainers; [ skeidel mic92 ];
diff --git a/pkgs/applications/audio/gradio/default.nix b/pkgs/applications/audio/gradio/default.nix
index 487b0a730d83..384235fc0650 100644
--- a/pkgs/applications/audio/gradio/default.nix
+++ b/pkgs/applications/audio/gradio/default.nix
@@ -63,7 +63,7 @@ in stdenv.mkDerivation {
   patches = [ ./0001-Remove-post-install-script-that-hardcodes-paths.patch ];
 
   meta = with stdenv.lib; {
-    homepage = https://github.com/haecker-felix/gradio;
+    homepage = "https://github.com/haecker-felix/gradio";
     description = "A GTK3 app for finding and listening to internet radio stations";
     license = licenses.gpl3;
     platforms = platforms.linux;
diff --git a/pkgs/applications/audio/gtklick/default.nix b/pkgs/applications/audio/gtklick/default.nix
index b653ae5ca588..a81834c1fff7 100644
--- a/pkgs/applications/audio/gtklick/default.nix
+++ b/pkgs/applications/audio/gtklick/default.nix
@@ -27,7 +27,7 @@ pythonPackages.buildPythonApplication rec {
   '';
 
   meta = {
-    homepage = http://das.nasophon.de/gtklick/;
+    homepage = "http://das.nasophon.de/gtklick/";
     description = "Simple metronome with an easy-to-use GTK interface";
     license = stdenv.lib.licenses.gpl2Plus;
   };
diff --git a/pkgs/applications/audio/gtkpod/default.nix b/pkgs/applications/audio/gtkpod/default.nix
index fd3632ee1552..1f293fe2d796 100644
--- a/pkgs/applications/audio/gtkpod/default.nix
+++ b/pkgs/applications/audio/gtkpod/default.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "GTK Manager for an Apple ipod";
-    homepage = http://gtkpod.sourceforge.net;
+    homepage = "http://gtkpod.sourceforge.net";
     license = licenses.gpl2Plus;
     platforms = platforms.linux;
     maintainers = [ maintainers.skeidel ];
diff --git a/pkgs/applications/audio/guitarix/default.nix b/pkgs/applications/audio/guitarix/default.nix
index acb078fea876..095cd79b56e4 100644
--- a/pkgs/applications/audio/guitarix/default.nix
+++ b/pkgs/applications/audio/guitarix/default.nix
@@ -62,7 +62,7 @@ stdenv.mkDerivation rec {
       clean-sounds, nice overdrive, fat distortion and a diversity of
       crazy sounds never heard before.
     '';
-    homepage = http://guitarix.sourceforge.net/;
+    homepage = "http://guitarix.sourceforge.net/";
     license = licenses.gpl3Plus;
     maintainers = with maintainers; [ astsmtl goibhniu ];
     platforms = platforms.linux;
diff --git a/pkgs/applications/audio/gxmatcheq-lv2/default.nix b/pkgs/applications/audio/gxmatcheq-lv2/default.nix
index 1d5579d74c05..b2d99e0eba86 100644
--- a/pkgs/applications/audio/gxmatcheq-lv2/default.nix
+++ b/pkgs/applications/audio/gxmatcheq-lv2/default.nix
@@ -22,7 +22,7 @@ stdenv.mkDerivation rec {
   installFlags = [ "INSTALL_DIR=$(out)/lib/lv2" ];
 
   meta = with stdenv.lib; {
-    homepage = https://github.com/brummer10/GxMatchEQ.lv2;
+    homepage = "https://github.com/brummer10/GxMatchEQ.lv2";
     description = "Matching Equalizer to apply EQ curve from one source to another source";
     maintainers = [ maintainers.magnetophon ];
     license = licenses.gpl3;
diff --git a/pkgs/applications/audio/gxplugins-lv2/default.nix b/pkgs/applications/audio/gxplugins-lv2/default.nix
index 1f4323eb9d55..077bb407020e 100644
--- a/pkgs/applications/audio/gxplugins-lv2/default.nix
+++ b/pkgs/applications/audio/gxplugins-lv2/default.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = with stdenv.lib; {
-    homepage = https://github.com/brummer10/GxPlugins.lv2;
+    homepage = "https://github.com/brummer10/GxPlugins.lv2";
     description = "A set of extra lv2 plugins from the guitarix project";
     maintainers = [ maintainers.magnetophon ];
     license = licenses.gpl3;
diff --git a/pkgs/applications/audio/helio-workstation/default.nix b/pkgs/applications/audio/helio-workstation/default.nix
index bfd211316a7c..3ada3224e33e 100644
--- a/pkgs/applications/audio/helio-workstation/default.nix
+++ b/pkgs/applications/audio/helio-workstation/default.nix
@@ -38,7 +38,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "One music sequencer for all major platforms, both desktop and mobile";
-    homepage = https://helio.fm/;
+    homepage = "https://helio.fm/";
     license = licenses.gpl3;
     maintainers = [ maintainers.suhr ];
     platforms = [ "x86_64-linux" ];
diff --git a/pkgs/applications/audio/helm/default.nix b/pkgs/applications/audio/helm/default.nix
index 428490e119a6..8459967a363c 100644
--- a/pkgs/applications/audio/helm/default.nix
+++ b/pkgs/applications/audio/helm/default.nix
@@ -34,7 +34,7 @@
   '';
 
   meta = with stdenv.lib; {
-    homepage = http://tytel.org/helm;
+    homepage = "http://tytel.org/helm";
     description = "A free, cross-platform, polyphonic synthesizer";
     longDescription = ''
       A free, cross-platform, polyphonic synthesizer.
diff --git a/pkgs/applications/audio/hybridreverb2/default.nix b/pkgs/applications/audio/hybridreverb2/default.nix
index 19aac1bd1e95..3f1fac79623d 100644
--- a/pkgs/applications/audio/hybridreverb2/default.nix
+++ b/pkgs/applications/audio/hybridreverb2/default.nix
@@ -40,7 +40,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = with stdenv.lib; {
-    homepage = http://www2.ika.ruhr-uni-bochum.de/HybridReverb2;
+    homepage = "http://www2.ika.ruhr-uni-bochum.de/HybridReverb2";
     description = "Reverb effect using hybrid impulse convolution";
     license = licenses.gpl2Plus;
     maintainers = [ maintainers.magnetophon ];
diff --git a/pkgs/applications/audio/hydrogen/default.nix b/pkgs/applications/audio/hydrogen/default.nix
index d8aa2a013c4d..b3aff4e4c509 100644
--- a/pkgs/applications/audio/hydrogen/default.nix
+++ b/pkgs/applications/audio/hydrogen/default.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Advanced drum machine";
-    homepage = http://www.hydrogen-music.org;
+    homepage = "http://www.hydrogen-music.org";
     license = licenses.gpl2;
     platforms = platforms.linux;
     maintainers = [ maintainers.goibhniu ];
diff --git a/pkgs/applications/audio/i-score/default.nix b/pkgs/applications/audio/i-score/default.nix
index f3928499413c..daedb9b98206 100644
--- a/pkgs/applications/audio/i-score/default.nix
+++ b/pkgs/applications/audio/i-score/default.nix
@@ -77,7 +77,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "An interactive sequencer for the intermedia arts";
-    homepage = http://i-score.org/;
+    homepage = "http://i-score.org/";
     license = stdenv.lib.licenses.cecill20;
     maintainers = [ stdenv.lib.maintainers.magnetophon ];
     platforms = stdenv.lib.platforms.linux;
diff --git a/pkgs/applications/audio/iannix/default.nix b/pkgs/applications/audio/iannix/default.nix
index a893390d74ed..2d4a2e9265a3 100644
--- a/pkgs/applications/audio/iannix/default.nix
+++ b/pkgs/applications/audio/iannix/default.nix
@@ -22,7 +22,7 @@ stdenv.mkDerivation {
 
   meta = {
     description = "Graphical open-source sequencer,";
-    homepage = https://www.iannix.org/;
+    homepage = "https://www.iannix.org/";
     license = stdenv.lib.licenses.lgpl3;
     platforms = stdenv.lib.platforms.linux;
     maintainers = [ stdenv.lib.maintainers.nico202 ];
diff --git a/pkgs/applications/audio/id3v2/default.nix b/pkgs/applications/audio/id3v2/default.nix
index 0fdb3b2a4a14..75d999ede1d7 100644
--- a/pkgs/applications/audio/id3v2/default.nix
+++ b/pkgs/applications/audio/id3v2/default.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "A command line editor for id3v2 tags";
-    homepage = http://id3v2.sourceforge.net/;
+    homepage = "http://id3v2.sourceforge.net/";
     license = licenses.gpl2Plus;
     platforms = with platforms; unix;
   };
diff --git a/pkgs/applications/audio/infamousPlugins/default.nix b/pkgs/applications/audio/infamousPlugins/default.nix
index 341c41818421..2cfe77ec291f 100644
--- a/pkgs/applications/audio/infamousPlugins/default.nix
+++ b/pkgs/applications/audio/infamousPlugins/default.nix
@@ -15,7 +15,7 @@ stdenv.mkDerivation rec {
   buildInputs = [ cairomm lv2 libpthreadstubs libXdmcp libXft ntk pcre fftwFloat zita-resampler ];
 
   meta = with stdenv.lib; {
-    homepage = https://ssj71.github.io/infamousPlugins;
+    homepage = "https://ssj71.github.io/infamousPlugins";
     description = "A collection of open-source LV2 plugins";
     longDescription = ''
       These are audio plugins in the LV2 format, developed for linux. Most are suitable for live use.
diff --git a/pkgs/applications/audio/ingen/default.nix b/pkgs/applications/audio/ingen/default.nix
index 9d3fb6aae40b..c5d4b3f87f49 100644
--- a/pkgs/applications/audio/ingen/default.nix
+++ b/pkgs/applications/audio/ingen/default.nix
@@ -38,7 +38,7 @@ stdenv.mkDerivation  rec {
 
   meta = with stdenv.lib; {
     description = "A modular audio processing system using JACK and LV2 or LADSPA plugins";
-    homepage = http://drobilla.net/software/ingen;
+    homepage = "http://drobilla.net/software/ingen";
     license = licenses.agpl3Plus;
     maintainers = [ maintainers.goibhniu ];
     platforms = platforms.linux;
diff --git a/pkgs/applications/audio/ir.lv2/default.nix b/pkgs/applications/audio/ir.lv2/default.nix
index 9d3656a81f97..f9f58ab5ec1a 100644
--- a/pkgs/applications/audio/ir.lv2/default.nix
+++ b/pkgs/applications/audio/ir.lv2/default.nix
@@ -27,7 +27,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = with stdenv.lib; {
-    homepage = http://factorial.hu/plugins/lv2/ir;
+    homepage = "http://factorial.hu/plugins/lv2/ir";
     description = "Zero-latency, realtime, high performance signal convolver especially for creating reverb effects";
     license = licenses.gpl2;
     maintainers = [ maintainers.magnetophon ];
diff --git a/pkgs/applications/audio/jaaa/default.nix b/pkgs/applications/audio/jaaa/default.nix
index 92b2f8ac5153..80f15935af23 100644
--- a/pkgs/applications/audio/jaaa/default.nix
+++ b/pkgs/applications/audio/jaaa/default.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = with stdenv.lib; {
-    homepage = http://kokkinizita.linuxaudio.org/linuxaudio/index.html;
+    homepage = "http://kokkinizita.linuxaudio.org/linuxaudio/index.html";
     description = "JACK and ALSA Audio Analyser";
     license = licenses.gpl2;
     maintainers = [ maintainers.magnetophon ];
diff --git a/pkgs/applications/audio/jack-capture/default.nix b/pkgs/applications/audio/jack-capture/default.nix
index c62ccc4fc883..e443a0a52694 100644
--- a/pkgs/applications/audio/jack-capture/default.nix
+++ b/pkgs/applications/audio/jack-capture/default.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "A program for recording soundfiles with jack";
-    homepage = http://archive.notam02.no/arkiv/src;
+    homepage = "http://archive.notam02.no/arkiv/src";
     license = licenses.gpl2;
     maintainers = [ maintainers.goibhniu ];
     platforms = stdenv.lib.platforms.linux;
diff --git a/pkgs/applications/audio/jack-oscrolloscope/default.nix b/pkgs/applications/audio/jack-oscrolloscope/default.nix
index 5bad5453504f..08263f2abddc 100644
--- a/pkgs/applications/audio/jack-oscrolloscope/default.nix
+++ b/pkgs/applications/audio/jack-oscrolloscope/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; { 
     description = "A simple waveform viewer for JACK";
-    homepage = http://das.nasophon.de/jack_oscrolloscope;
+    homepage = "http://das.nasophon.de/jack_oscrolloscope";
     license = licenses.gpl2;
     maintainers = [ maintainers.goibhniu ];
     platforms = stdenv.lib.platforms.linux;
diff --git a/pkgs/applications/audio/jack-rack/default.nix b/pkgs/applications/audio/jack-rack/default.nix
index 2f9b9db93c24..d13dbcc16889 100644
--- a/pkgs/applications/audio/jack-rack/default.nix
+++ b/pkgs/applications/audio/jack-rack/default.nix
@@ -17,7 +17,7 @@ stdenv.mkDerivation rec {
       be controlled using the ALSA sequencer. It's phat; it turns your
       computer into an effects box.
     '';
-    homepage = http://jack-rack.sourceforge.net/;
+    homepage = "http://jack-rack.sourceforge.net/";
     license = stdenv.lib.licenses.gpl2Plus;
     maintainers = [ stdenv.lib.maintainers.astsmtl ];
     platforms = stdenv.lib.platforms.linux;
diff --git a/pkgs/applications/audio/jackmeter/default.nix b/pkgs/applications/audio/jackmeter/default.nix
index e44dfddd37b7..2a75b384af5c 100644
--- a/pkgs/applications/audio/jackmeter/default.nix
+++ b/pkgs/applications/audio/jackmeter/default.nix
@@ -13,7 +13,7 @@ stdenv.mkDerivation rec {
 
   meta = { 
     description = "Console jack loudness meter";
-    homepage = https://www.aelius.com/njh/jackmeter/;
+    homepage = "https://www.aelius.com/njh/jackmeter/";
     license = stdenv.lib.licenses.gpl2;
     maintainers = [ stdenv.lib.maintainers.marcweber ];
     platforms = stdenv.lib.platforms.linux;
diff --git a/pkgs/applications/audio/jackmix/default.nix b/pkgs/applications/audio/jackmix/default.nix
index 5df6e1e2daea..c3a46439ba70 100644
--- a/pkgs/applications/audio/jackmix/default.nix
+++ b/pkgs/applications/audio/jackmix/default.nix
@@ -3,7 +3,7 @@
 stdenv.mkDerivation {
   name = "jackmix-0.5.2";
   src = fetchurl {
-    url = https://github.com/kampfschlaefer/jackmix/archive/v0.5.2.tar.gz;
+    url = "https://github.com/kampfschlaefer/jackmix/archive/v0.5.2.tar.gz";
     sha256 = "18f5v7g66mgarhs476frvayhch7fy4nyjf2xivixc061ipn0m82j";
   };
 
@@ -22,7 +22,7 @@ stdenv.mkDerivation {
 
   meta = {
     description = "Matrix-Mixer for the Jack-Audio-connection-Kit";
-    homepage = http://www.arnoldarts.de/jackmix/;
+    homepage = "http://www.arnoldarts.de/jackmix/";
     license = stdenv.lib.licenses.gpl2;
     maintainers = [ stdenv.lib.maintainers.kampfschlaefer ];
     platforms = stdenv.lib.platforms.linux;
diff --git a/pkgs/applications/audio/jalv/default.nix b/pkgs/applications/audio/jalv/default.nix
index 51ec102dbfd2..bbf66a74bc50 100644
--- a/pkgs/applications/audio/jalv/default.nix
+++ b/pkgs/applications/audio/jalv/default.nix
@@ -17,7 +17,7 @@ stdenv.mkDerivation  rec {
 
   meta = with stdenv.lib; {
     description = "A simple but fully featured LV2 host for Jack";
-    homepage = http://drobilla.net/software/jalv;
+    homepage = "http://drobilla.net/software/jalv";
     license = licenses.isc;
     maintainers = [ maintainers.goibhniu ];
     platforms = platforms.linux;
diff --git a/pkgs/applications/audio/jamin/default.nix b/pkgs/applications/audio/jamin/default.nix
index 818630585cfd..a9b423320a0e 100644
--- a/pkgs/applications/audio/jamin/default.nix
+++ b/pkgs/applications/audio/jamin/default.nix
@@ -6,7 +6,7 @@ stdenv.mkDerivation {
   name = "jamin-0.95.0";
 
   src = fetchurl {
-    url = mirror://sourceforge/jamin/jamin-0.95.0.tar.gz;
+    url = "mirror://sourceforge/jamin/jamin-0.95.0.tar.gz";
     sha256 = "0g5v74cm0q3p3pzl6xmnp4rqayaymfli7c6z8s78h9rgd24fwbvn";
   };
 
@@ -21,7 +21,7 @@ stdenv.mkDerivation {
   '';
 
   meta = with stdenv.lib; {
-    homepage = http://jamin.sourceforge.net;
+    homepage = "http://jamin.sourceforge.net";
     description = "JACK Audio Mastering interface";
     license = licenses.gpl2;
     maintainers = [ maintainers.nico202 ];
diff --git a/pkgs/applications/audio/japa/default.nix b/pkgs/applications/audio/japa/default.nix
index a9eb15aabf35..426fea21107f 100644
--- a/pkgs/applications/audio/japa/default.nix
+++ b/pkgs/applications/audio/japa/default.nix
@@ -22,7 +22,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "A 'perceptual' or 'psychoacoustic' audio spectrum analyser for JACK and ALSA";
-    homepage = http://kokkinizita.linuxaudio.org/linuxaudio/index.html;
+    homepage = "http://kokkinizita.linuxaudio.org/linuxaudio/index.html";
     license = stdenv.lib.licenses.gpl2;
     maintainers = [ stdenv.lib.maintainers.magnetophon ];
     platforms = stdenv.lib.platforms.linux;
diff --git a/pkgs/applications/audio/keyfinder/default.nix b/pkgs/applications/audio/keyfinder/default.nix
index d47fc3b6190d..710c1e807929 100644
--- a/pkgs/applications/audio/keyfinder/default.nix
+++ b/pkgs/applications/audio/keyfinder/default.nix
@@ -34,7 +34,7 @@ stdenv.mkDerivation rec {
       management, no track suggestions, no media player. Just a fast,
       efficient workflow tool.
     '';
-    homepage = http://www.ibrahimshaath.co.uk/keyfinder/;
+    homepage = "http://www.ibrahimshaath.co.uk/keyfinder/";
     license = licenses.gpl3Plus;
     platforms = platforms.linux;
   };
diff --git a/pkgs/applications/audio/kid3/default.nix b/pkgs/applications/audio/kid3/default.nix
index dcd305abdee6..cfcad390f4c9 100644
--- a/pkgs/applications/audio/kid3/default.nix
+++ b/pkgs/applications/audio/kid3/default.nix
@@ -64,7 +64,7 @@ stdenv.mkDerivation rec {
       - Edit synchronized lyrics and event timing codes, import and
         export LRC files
     '';
-    homepage = http://kid3.sourceforge.net/;
+    homepage = "http://kid3.sourceforge.net/";
     license = licenses.lgpl2Plus;
     maintainers = [ maintainers.AndersonTorres ];
     platforms = platforms.linux;
diff --git a/pkgs/applications/audio/klick/default.nix b/pkgs/applications/audio/klick/default.nix
index f33245d8f1c9..9ff063c1c807 100644
--- a/pkgs/applications/audio/klick/default.nix
+++ b/pkgs/applications/audio/klick/default.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation rec {
   NIX_CFLAGS_COMPILE = "-fpermissive";
 
   meta = {
-    homepage = http://das.nasophon.de/klick/;
+    homepage = "http://das.nasophon.de/klick/";
     description = "Advanced command-line metronome for JACK";
     license = stdenv.lib.licenses.gpl2Plus;
     platforms = stdenv.lib.platforms.linux;
diff --git a/pkgs/applications/audio/ladspa-plugins/default.nix b/pkgs/applications/audio/ladspa-plugins/default.nix
index 44186abc3c46..a0fc8631fb39 100644
--- a/pkgs/applications/audio/ladspa-plugins/default.nix
+++ b/pkgs/applications/audio/ladspa-plugins/default.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = with stdenv.lib; {
-    homepage = http://plugin.org.uk/;
+    homepage = "http://plugin.org.uk/";
     description = "LADSPA format audio plugins";
     license = licenses.gpl2;
     maintainers = [ maintainers.magnetophon ];
diff --git a/pkgs/applications/audio/ladspa-sdk/default.nix b/pkgs/applications/audio/ladspa-sdk/default.nix
index a7779ee8aeea..76acd1daba7f 100644
--- a/pkgs/applications/audio/ladspa-sdk/default.nix
+++ b/pkgs/applications/audio/ladspa-sdk/default.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
       ten example LADSPA plugins and
       three example programs (applyplugin, analyseplugin and listplugins).
     '';
-    homepage = http://www.ladspa.org/ladspa_sdk/overview.html;
+    homepage = "http://www.ladspa.org/ladspa_sdk/overview.html";
     license = stdenv.lib.licenses.lgpl2;
     maintainers = [ stdenv.lib.maintainers.magnetophon ];
     platforms = stdenv.lib.platforms.linux;
diff --git a/pkgs/applications/audio/ladspa-sdk/ladspah.nix b/pkgs/applications/audio/ladspa-sdk/ladspah.nix
index 3fad5de1de59..d51aa3b75e1f 100644
--- a/pkgs/applications/audio/ladspa-sdk/ladspah.nix
+++ b/pkgs/applications/audio/ladspa-sdk/ladspah.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
       The ladspa.h API header file from the LADSPA SDK.
       For the full SDK, use the ladspa-sdk package.
     '';
-    homepage = http://www.ladspa.org/ladspa_sdk/overview.html;
+    homepage = "http://www.ladspa.org/ladspa_sdk/overview.html";
     license = stdenv.lib.licenses.lgpl2;
     maintainers = [ stdenv.lib.maintainers.magnetophon ];
     platforms = stdenv.lib.platforms.all;
diff --git a/pkgs/applications/audio/lash/default.nix b/pkgs/applications/audio/lash/default.nix
index 0dbe60b6a615..cb0a3ee05e12 100644
--- a/pkgs/applications/audio/lash/default.nix
+++ b/pkgs/applications/audio/lash/default.nix
@@ -31,7 +31,7 @@ stdenv.mkDerivation  rec {
     longDescription = ''
       Session management system for GNU/Linux audio applications.
     '';
-    homepage = https://www.nongnu.org/lash;
+    homepage = "https://www.nongnu.org/lash";
     license = licenses.gpl2Plus;
     platforms = platforms.linux;
     maintainers = [ maintainers.goibhniu ];
diff --git a/pkgs/applications/audio/lastfmsubmitd/default.nix b/pkgs/applications/audio/lastfmsubmitd/default.nix
index 3135a00334c7..efafc5b05b18 100644
--- a/pkgs/applications/audio/lastfmsubmitd/default.nix
+++ b/pkgs/applications/audio/lastfmsubmitd/default.nix
@@ -14,7 +14,7 @@ pythonPackages.buildPythonApplication rec {
   installCommand = "python setup.py install --prefix=$out";
 
   meta = {
-    homepage = https://www.red-bean.com/decklin/lastfmsubmitd/;
+    homepage = "https://www.red-bean.com/decklin/lastfmsubmitd/";
     license = lib.licenses.mit;
     description = "An last.fm audio scrobbler and daemon";
   };
diff --git a/pkgs/applications/audio/linuxband/default.nix b/pkgs/applications/audio/linuxband/default.nix
index b5a99150cb22..cd9ca5e26748 100644
--- a/pkgs/applications/audio/linuxband/default.nix
+++ b/pkgs/applications/audio/linuxband/default.nix
@@ -29,7 +29,7 @@ in stdenv.mkDerivation rec {
 
   meta = {
     description = "A GUI front-end for MMA: Type in the chords, choose the groove and it will play an accompaniment";
-    homepage = http://linuxband.org/;
+    homepage = "http://linuxband.org/";
     license = stdenv.lib.licenses.gpl2;
     maintainers = [ stdenv.lib.maintainers.magnetophon ];
     platforms = stdenv.lib.platforms.linux;
diff --git a/pkgs/applications/audio/linuxsampler/default.nix b/pkgs/applications/audio/linuxsampler/default.nix
index f13f10d15e82..6b6cfd55926b 100644
--- a/pkgs/applications/audio/linuxsampler/default.nix
+++ b/pkgs/applications/audio/linuxsampler/default.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
   enableParallelBuilding = true;
 
   meta = with stdenv.lib; {
-    homepage = http://www.linuxsampler.org;
+    homepage = "http://www.linuxsampler.org";
     description = "Sampler backend";
     longDescription = ''
       Includes sampler engine, audio and MIDI drivers, network layer
diff --git a/pkgs/applications/audio/lmms/default.nix b/pkgs/applications/audio/lmms/default.nix
index 0420a52d89b8..c243e9beb233 100644
--- a/pkgs/applications/audio/lmms/default.nix
+++ b/pkgs/applications/audio/lmms/default.nix
@@ -41,7 +41,7 @@ mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "DAW similar to FL Studio (music production software)";
-    homepage = https://lmms.io;
+    homepage = "https://lmms.io";
     license = licenses.gpl2Plus;
     platforms = [ "x86_64-linux" "i686-linux" ];
     maintainers = with maintainers; [ goibhniu yegortimoshenko ];
diff --git a/pkgs/applications/audio/lollypop/default.nix b/pkgs/applications/audio/lollypop/default.nix
index d0f88170980a..a3580ce3b522 100644
--- a/pkgs/applications/audio/lollypop/default.nix
+++ b/pkgs/applications/audio/lollypop/default.nix
@@ -94,7 +94,7 @@ python3.pkgs.buildPythonApplication rec  {
   meta = with lib; {
     changelog = "https://gitlab.gnome.org/World/lollypop/tags/${version}";
     description = "A modern music player for GNOME";
-    homepage = https://wiki.gnome.org/Apps/Lollypop;
+    homepage = "https://wiki.gnome.org/Apps/Lollypop";
     license = licenses.gpl3Plus;
     maintainers = with maintainers; [ worldofpeace ];
     platforms = platforms.linux;
diff --git a/pkgs/applications/audio/lsp-plugins/default.nix b/pkgs/applications/audio/lsp-plugins/default.nix
index 8a2f64b4efd4..a8aa101ab4de 100644
--- a/pkgs/applications/audio/lsp-plugins/default.nix
+++ b/pkgs/applications/audio/lsp-plugins/default.nix
@@ -140,7 +140,7 @@ stdenv.mkDerivation rec {
         - Delay Compensator Stereo - Verzögerungsausgleicher Stereo
         - Delay Compensator x2 Stereo - Verzögerungsausgleicher x2 Stereo
       '';
-      homepage = https://lsp-plug.in;
+      homepage = "https://lsp-plug.in";
       maintainers = with maintainers; [ magnetophon ];
       license = licenses.gpl2;
       platforms = platforms.linux;
diff --git a/pkgs/applications/audio/luppp/default.nix b/pkgs/applications/audio/luppp/default.nix
index fdba836a6ae2..c1494ffc3334 100644
--- a/pkgs/applications/audio/luppp/default.nix
+++ b/pkgs/applications/audio/luppp/default.nix
@@ -31,7 +31,7 @@ stdenv.mkDerivation rec {
   ];
 
   meta = with stdenv.lib; {
-    homepage = http://openavproductions.com/luppp/;
+    homepage = "http://openavproductions.com/luppp/";
     description = "A music creation tool, intended for live use";
     license = licenses.gpl3Plus;
     maintainers = with maintainers; [ prusnak ];
diff --git a/pkgs/applications/audio/lv2bm/default.nix b/pkgs/applications/audio/lv2bm/default.nix
index f1eddb626245..aee910f56eb6 100644
--- a/pkgs/applications/audio/lv2bm/default.nix
+++ b/pkgs/applications/audio/lv2bm/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation {
   '';
 
   meta = with stdenv.lib; {
-    homepage = https://github.com/portalmod/lv2bm;
+    homepage = "https://github.com/portalmod/lv2bm";
     description = "A benchmark tool for LV2 plugins";
     license = licenses.gpl3;
     maintainers = [ maintainers.magnetophon ];
diff --git a/pkgs/applications/audio/magnetophonDSP/CharacterCompressor/default.nix b/pkgs/applications/audio/magnetophonDSP/CharacterCompressor/default.nix
index 6488d1bd65e5..e16198696a69 100644
--- a/pkgs/applications/audio/magnetophonDSP/CharacterCompressor/default.nix
+++ b/pkgs/applications/audio/magnetophonDSP/CharacterCompressor/default.nix
@@ -30,7 +30,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "A compressor with character. For jack and lv2";
-    homepage = https://github.com/magnetophon/CharacterCompressor;
+    homepage = "https://github.com/magnetophon/CharacterCompressor";
     license = stdenv.lib.licenses.gpl3;
     maintainers = [ stdenv.lib.maintainers.magnetophon ];
   };
diff --git a/pkgs/applications/audio/magnetophonDSP/CompBus/default.nix b/pkgs/applications/audio/magnetophonDSP/CompBus/default.nix
index c5728b6e8b7b..1ccc9f3fcd5b 100644
--- a/pkgs/applications/audio/magnetophonDSP/CompBus/default.nix
+++ b/pkgs/applications/audio/magnetophonDSP/CompBus/default.nix
@@ -36,7 +36,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "A group of compressors mixed into a bus, sidechained from that mix bus. For jack and lv2";
-    homepage = https://github.com/magnetophon/CompBus;
+    homepage = "https://github.com/magnetophon/CompBus";
     license = stdenv.lib.licenses.gpl3;
     maintainers = [ stdenv.lib.maintainers.magnetophon ];
   };
diff --git a/pkgs/applications/audio/magnetophonDSP/ConstantDetuneChorus/default.nix b/pkgs/applications/audio/magnetophonDSP/ConstantDetuneChorus/default.nix
index 331e58c4bd29..d5ed7e85b696 100644
--- a/pkgs/applications/audio/magnetophonDSP/ConstantDetuneChorus/default.nix
+++ b/pkgs/applications/audio/magnetophonDSP/ConstantDetuneChorus/default.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "A chorus algorithm that maintains constant and symmetric detuning depth (in cents), regardless of modulation rate. For jack and lv2";
-    homepage = https://github.com/magnetophon/constant-detune-chorus;
+    homepage = "https://github.com/magnetophon/constant-detune-chorus";
     license = stdenv.lib.licenses.gpl3;
     maintainers = [ stdenv.lib.maintainers.magnetophon ];
   };
diff --git a/pkgs/applications/audio/magnetophonDSP/LazyLimiter/default.nix b/pkgs/applications/audio/magnetophonDSP/LazyLimiter/default.nix
index 046ee70e990c..6d119394d5de 100644
--- a/pkgs/applications/audio/magnetophonDSP/LazyLimiter/default.nix
+++ b/pkgs/applications/audio/magnetophonDSP/LazyLimiter/default.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "A fast yet clean lookahead limiter for jack and lv2";
-    homepage = https://magnetophon.github.io/LazyLimiter/;
+    homepage = "https://magnetophon.github.io/LazyLimiter/";
     license = stdenv.lib.licenses.gpl2;
     maintainers = [ stdenv.lib.maintainers.magnetophon ];
   };
diff --git a/pkgs/applications/audio/magnetophonDSP/MBdistortion/default.nix b/pkgs/applications/audio/magnetophonDSP/MBdistortion/default.nix
index aa7da17dafd1..0eb68e65eae6 100644
--- a/pkgs/applications/audio/magnetophonDSP/MBdistortion/default.nix
+++ b/pkgs/applications/audio/magnetophonDSP/MBdistortion/default.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "Mid-side multiband distortion for jack and lv2";
-    homepage = https://github.com/magnetophon/MBdistortion;
+    homepage = "https://github.com/magnetophon/MBdistortion";
     license = stdenv.lib.licenses.gpl2;
     maintainers = [ stdenv.lib.maintainers.magnetophon ];
   };
diff --git a/pkgs/applications/audio/magnetophonDSP/RhythmDelay/default.nix b/pkgs/applications/audio/magnetophonDSP/RhythmDelay/default.nix
index ae05866e57d0..be8ad72d28df 100644
--- a/pkgs/applications/audio/magnetophonDSP/RhythmDelay/default.nix
+++ b/pkgs/applications/audio/magnetophonDSP/RhythmDelay/default.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "Tap a rhythm into your delay! For jack and lv2";
-    homepage = https://github.com/magnetophon/RhythmDelay;
+    homepage = "https://github.com/magnetophon/RhythmDelay";
     license = stdenv.lib.licenses.gpl3;
     maintainers = [ stdenv.lib.maintainers.magnetophon ];
   };
diff --git a/pkgs/applications/audio/magnetophonDSP/VoiceOfFaust/default.nix b/pkgs/applications/audio/magnetophonDSP/VoiceOfFaust/default.nix
index 718bbdaf49ea..dce2db4cb770 100644
--- a/pkgs/applications/audio/magnetophonDSP/VoiceOfFaust/default.nix
+++ b/pkgs/applications/audio/magnetophonDSP/VoiceOfFaust/default.nix
@@ -49,7 +49,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "Turn your voice into a synthesizer";
-    homepage = https://github.com/magnetophon/VoiceOfFaust;
+    homepage = "https://github.com/magnetophon/VoiceOfFaust";
     license = stdenv.lib.licenses.gpl3;
     maintainers = [ stdenv.lib.maintainers.magnetophon ];
   };
diff --git a/pkgs/applications/audio/magnetophonDSP/faustCompressors/default.nix b/pkgs/applications/audio/magnetophonDSP/faustCompressors/default.nix
index 735e7efe54dc..172b5ed38913 100644
--- a/pkgs/applications/audio/magnetophonDSP/faustCompressors/default.nix
+++ b/pkgs/applications/audio/magnetophonDSP/faustCompressors/default.nix
@@ -41,7 +41,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "A collection of bread and butter compressors";
-    homepage = https://github.com/magnetophon/faustCompressors;
+    homepage = "https://github.com/magnetophon/faustCompressors";
     license = stdenv.lib.licenses.gpl3;
     maintainers = [ stdenv.lib.maintainers.magnetophon ];
   };
diff --git a/pkgs/applications/audio/magnetophonDSP/pluginUtils/default.nix b/pkgs/applications/audio/magnetophonDSP/pluginUtils/default.nix
index 356e95bf97c8..11d51d756abc 100644
--- a/pkgs/applications/audio/magnetophonDSP/pluginUtils/default.nix
+++ b/pkgs/applications/audio/magnetophonDSP/pluginUtils/default.nix
@@ -33,7 +33,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "Some simple utility lv2 plugins";
-    homepage = https://github.com/magnetophon/pluginUtils;
+    homepage = "https://github.com/magnetophon/pluginUtils";
     license = stdenv.lib.licenses.gpl3;
     maintainers = [ stdenv.lib.maintainers.magnetophon ];
   };
diff --git a/pkgs/applications/audio/magnetophonDSP/shelfMultiBand/default.nix b/pkgs/applications/audio/magnetophonDSP/shelfMultiBand/default.nix
index 292cd3dfd860..360cee243c33 100644
--- a/pkgs/applications/audio/magnetophonDSP/shelfMultiBand/default.nix
+++ b/pkgs/applications/audio/magnetophonDSP/shelfMultiBand/default.nix
@@ -30,7 +30,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "A multiband compressor made from shelving filters.";
-    homepage = https://github.com/magnetophon/shelfMultiBand;
+    homepage = "https://github.com/magnetophon/shelfMultiBand";
     license = stdenv.lib.licenses.gpl3;
     maintainers = [ stdenv.lib.maintainers.magnetophon ];
   };
diff --git a/pkgs/applications/audio/mda-lv2/default.nix b/pkgs/applications/audio/mda-lv2/default.nix
index 6c4170cf0fb6..2464abb6585c 100644
--- a/pkgs/applications/audio/mda-lv2/default.nix
+++ b/pkgs/applications/audio/mda-lv2/default.nix
@@ -13,7 +13,7 @@ stdenv.mkDerivation rec {
   buildInputs = [ fftwSinglePrec lv2 ];
 
   meta = with stdenv.lib; {
-    homepage = http://drobilla.net/software/mda-lv2/;
+    homepage = "http://drobilla.net/software/mda-lv2/";
     description = "An LV2 port of the MDA plugins by Paul Kellett";
     license = licenses.gpl2Plus;
     maintainers = [ maintainers.goibhniu ];
diff --git a/pkgs/applications/audio/meterbridge/default.nix b/pkgs/applications/audio/meterbridge/default.nix
index 4d2fa0e15b48..9d807358cd5a 100644
--- a/pkgs/applications/audio/meterbridge/default.nix
+++ b/pkgs/applications/audio/meterbridge/default.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Various meters (VU, PPM, DPM, JF, SCO) for Jack Audio Connection Kit";
-    homepage = http://plugin.org.uk/meterbridge/;
+    homepage = "http://plugin.org.uk/meterbridge/";
     license = licenses.gpl2;
     platforms = platforms.linux;
     maintainers = [ maintainers.nico202 ];
diff --git a/pkgs/applications/audio/meters_lv2/default.nix b/pkgs/applications/audio/meters_lv2/default.nix
index 12383dcbbda4..cd9523d27108 100644
--- a/pkgs/applications/audio/meters_lv2/default.nix
+++ b/pkgs/applications/audio/meters_lv2/default.nix
@@ -38,7 +38,7 @@ stdenv.mkDerivation {
 
   meta = with stdenv.lib;
     { description = "Collection of audio level meters with GUI in LV2 plugin format";
-      homepage = http://x42.github.io/meters.lv2/;
+      homepage = "http://x42.github.io/meters.lv2/";
       maintainers = with maintainers; [ ehmry ];
       license = licenses.gpl2;
       platforms = platforms.linux;
diff --git a/pkgs/applications/audio/mhwaveedit/default.nix b/pkgs/applications/audio/mhwaveedit/default.nix
index e4d6c0293df8..67204260da24 100644
--- a/pkgs/applications/audio/mhwaveedit/default.nix
+++ b/pkgs/applications/audio/mhwaveedit/default.nix
@@ -31,7 +31,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Graphical program for editing, playing and recording sound files";
-    homepage = https://github.com/magnush/mhwaveedit;
+    homepage = "https://github.com/magnush/mhwaveedit";
     license = licenses.gpl2Plus;
     platforms = platforms.linux;
     maintainers = [ maintainers.goibhniu ];
diff --git a/pkgs/applications/audio/mid2key/default.nix b/pkgs/applications/audio/mid2key/default.nix
index 3c5660724d39..071b18e5a8a6 100644
--- a/pkgs/applications/audio/mid2key/default.nix
+++ b/pkgs/applications/audio/mid2key/default.nix
@@ -17,7 +17,7 @@ stdenv.mkDerivation rec {
   installPhase = "mkdir -p $out/bin && mv mid2key $out/bin";
 
   meta = with stdenv.lib; {
-    homepage = http://code.google.com/p/mid2key/;
+    homepage = "http://code.google.com/p/mid2key/";
     description = "A simple tool which maps midi notes to simulated keystrokes";
     license = licenses.gpl3;
     maintainers = [ maintainers.goibhniu ];
diff --git a/pkgs/applications/audio/midas/m32edit.nix b/pkgs/applications/audio/midas/m32edit.nix
index c8a751c235b1..6af11d42e31f 100644
--- a/pkgs/applications/audio/midas/m32edit.nix
+++ b/pkgs/applications/audio/midas/m32edit.nix
@@ -5,5 +5,5 @@ callPackage ./generic.nix (args // {
   type = "M32";
   version = "3.2";
   sha256 = "1cds6qinz37086l6pmmgrzrxadygjr2z96sjjyznnai2wz4z2nrd";
-  homepage = http://www.musictri.be/Categories/Midas/Mixers/Digital/M32/p/P0B3I/downloads;
+  homepage = "http://www.musictri.be/Categories/Midas/Mixers/Digital/M32/p/P0B3I/downloads";
 })
diff --git a/pkgs/applications/audio/midas/x32edit.nix b/pkgs/applications/audio/midas/x32edit.nix
index 4aacfcc89a36..7e364ff984a5 100644
--- a/pkgs/applications/audio/midas/x32edit.nix
+++ b/pkgs/applications/audio/midas/x32edit.nix
@@ -5,5 +5,5 @@ callPackage ./generic.nix (args // {
   type = "X32";
   version = "3.2";
   sha256 = "1lzmhd0sqnlzc0khpwm82sfi48qhv7rg153a57qjih7hhhy41mzk";
-  homepage = http://www.musictri.be/Categories/Behringer/Mixers/Digital/X32/p/P0ASF/downloads;
+  homepage = "http://www.musictri.be/Categories/Behringer/Mixers/Digital/X32/p/P0ASF/downloads";
 })
diff --git a/pkgs/applications/audio/midisheetmusic/default.nix b/pkgs/applications/audio/midisheetmusic/default.nix
index 48052fc4ec88..388fc2a1b3ea 100644
--- a/pkgs/applications/audio/midisheetmusic/default.nix
+++ b/pkgs/applications/audio/midisheetmusic/default.nix
@@ -54,7 +54,7 @@ in stdenv.mkDerivation {
 
   meta = with stdenv.lib; {
     description = "Convert MIDI Files to Piano Sheet Music for two hands";
-    homepage = http://midisheetmusic.com;
+    homepage = "http://midisheetmusic.com";
     license = licenses.gpl2;
     maintainers = [ maintainers.gnidorah ];
     platforms = platforms.linux;
diff --git a/pkgs/applications/audio/mikmod/default.nix b/pkgs/applications/audio/mikmod/default.nix
index 42fa8b7621a5..9be303cb652a 100644
--- a/pkgs/applications/audio/mikmod/default.nix
+++ b/pkgs/applications/audio/mikmod/default.nix
@@ -12,7 +12,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "Tracker music player for the terminal";
-    homepage = http://mikmod.shlomifish.org/;
+    homepage = "http://mikmod.shlomifish.org/";
     license = stdenv.lib.licenses.gpl2Plus;
     maintainers = with stdenv.lib.maintainers; [ ];
     platforms = with stdenv.lib.platforms; linux;
diff --git a/pkgs/applications/audio/milkytracker/default.nix b/pkgs/applications/audio/milkytracker/default.nix
index bc508f92e3b5..d7b9e5a6355b 100644
--- a/pkgs/applications/audio/milkytracker/default.nix
+++ b/pkgs/applications/audio/milkytracker/default.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Music tracker application, similar to Fasttracker II";
-    homepage = http://milkytracker.org;
+    homepage = "http://milkytracker.org";
     license = licenses.gpl3Plus;
     platforms = [ "x86_64-linux" "i686-linux" ];
     maintainers = with maintainers; [ zoomulator ];
diff --git a/pkgs/applications/audio/mimic/default.nix b/pkgs/applications/audio/mimic/default.nix
index e91b2c9360de..e33e69ad78c3 100644
--- a/pkgs/applications/audio/mimic/default.nix
+++ b/pkgs/applications/audio/mimic/default.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "Mycroft's TTS engine, based on CMU's Flite (Festival Lite)";
-    homepage = https://mimic.mycroft.ai/;
+    homepage = "https://mimic.mycroft.ai/";
     license = stdenv.lib.licenses.free;
     platforms = stdenv.lib.platforms.linux;
     maintainers = [ stdenv.lib.maintainers.noneucat ];
diff --git a/pkgs/applications/audio/mimms/default.nix b/pkgs/applications/audio/mimms/default.nix
index 2d301a8b6a96..47e9fa306dc4 100644
--- a/pkgs/applications/audio/mimms/default.nix
+++ b/pkgs/applications/audio/mimms/default.nix
@@ -15,7 +15,7 @@ pythonPackages.buildPythonApplication rec {
   '';
 
   meta = {
-    homepage = https://savannah.nongnu.org/projects/mimms/;
+    homepage = "https://savannah.nongnu.org/projects/mimms/";
     license = stdenv.lib.licenses.gpl3;
     description = "An mms (e.g. mms://) stream downloader";
 
diff --git a/pkgs/applications/audio/mixxx/default.nix b/pkgs/applications/audio/mixxx/default.nix
index 8de05ee309b7..f889d9e1e8d2 100644
--- a/pkgs/applications/audio/mixxx/default.nix
+++ b/pkgs/applications/audio/mixxx/default.nix
@@ -49,7 +49,7 @@ mkDerivation rec {
   ];
 
   meta = with stdenv.lib; {
-    homepage = https://mixxx.org;
+    homepage = "https://mixxx.org";
     description = "Digital DJ mixing software";
     license = licenses.gpl2Plus;
     maintainers = [ maintainers.aszlig maintainers.goibhniu maintainers.bfortz ];
diff --git a/pkgs/applications/audio/moc/default.nix b/pkgs/applications/audio/moc/default.nix
index 5615f4cace3d..18b5a980633a 100644
--- a/pkgs/applications/audio/moc/default.nix
+++ b/pkgs/applications/audio/moc/default.nix
@@ -96,7 +96,7 @@ in stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "An ncurses console audio player designed to be powerful and easy to use";
-    homepage = http://moc.daper.net/;
+    homepage = "http://moc.daper.net/";
     license = licenses.gpl2;
     maintainers = with maintainers; [ aethelz pSub jagajaga ];
     platforms = platforms.linux;
diff --git a/pkgs/applications/audio/mod-distortion/default.nix b/pkgs/applications/audio/mod-distortion/default.nix
index c20f04ec9470..765def25d600 100644
--- a/pkgs/applications/audio/mod-distortion/default.nix
+++ b/pkgs/applications/audio/mod-distortion/default.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation {
   installFlags = [ "INSTALL_PATH=$(out)/lib/lv2" ];
 
   meta = with stdenv.lib; {
-    homepage = https://github.com/portalmod/mod-distortion;
+    homepage = "https://github.com/portalmod/mod-distortion";
     description = "Analog distortion emulation lv2 plugins";
     license = licenses.gpl3;
     maintainers = [ maintainers.magnetophon ];
diff --git a/pkgs/applications/audio/mopidy/gmusic.nix b/pkgs/applications/audio/mopidy/gmusic.nix
index 8c173140efd8..3dea9156f8fc 100644
--- a/pkgs/applications/audio/mopidy/gmusic.nix
+++ b/pkgs/applications/audio/mopidy/gmusic.nix
@@ -19,7 +19,7 @@ pythonPackages.buildPythonApplication rec {
   doCheck = false;
 
   meta = with stdenv.lib; {
-    homepage = https://www.mopidy.com/;
+    homepage = "https://www.mopidy.com/";
     description = "Mopidy extension for playing music from Google Play Music";
     license = licenses.asl20;
     maintainers = [ maintainers.jgillich ];
diff --git a/pkgs/applications/audio/mopidy/iris.nix b/pkgs/applications/audio/mopidy/iris.nix
index 000a0bc0bfe3..2badfd6a0b1c 100644
--- a/pkgs/applications/audio/mopidy/iris.nix
+++ b/pkgs/applications/audio/mopidy/iris.nix
@@ -21,7 +21,7 @@ python3Packages.buildPythonApplication rec {
   doCheck = false;
 
   meta = with stdenv.lib; {
-    homepage = https://github.com/jaedb/Iris;
+    homepage = "https://github.com/jaedb/Iris";
     description = "A fully-functional Mopidy web client encompassing Spotify and many other backends";
     license = licenses.asl20;
     maintainers = [ maintainers.rvolosatovs ];
diff --git a/pkgs/applications/audio/mopidy/local-images.nix b/pkgs/applications/audio/mopidy/local-images.nix
index 2ffc736572bf..085fe855e8a8 100644
--- a/pkgs/applications/audio/mopidy/local-images.nix
+++ b/pkgs/applications/audio/mopidy/local-images.nix
@@ -24,7 +24,7 @@ pythonPackages.buildPythonApplication rec {
   ];
 
   meta = with stdenv.lib; {
-    homepage = https://github.com/mopidy/mopidy-local-images;
+    homepage = "https://github.com/mopidy/mopidy-local-images";
     description = "Mopidy local library proxy extension for handling embedded album art";
     license = licenses.asl20;
     maintainers = [ maintainers.rvolosatovs ];
diff --git a/pkgs/applications/audio/mopidy/local-sqlite.nix b/pkgs/applications/audio/mopidy/local-sqlite.nix
index 6d0cc370ff34..23e01c02a0f5 100644
--- a/pkgs/applications/audio/mopidy/local-sqlite.nix
+++ b/pkgs/applications/audio/mopidy/local-sqlite.nix
@@ -17,7 +17,7 @@ pythonPackages.buildPythonApplication rec {
   ];
 
   meta = with stdenv.lib; {
-    homepage = https://github.com/mopidy/mopidy-local-sqlite;
+    homepage = "https://github.com/mopidy/mopidy-local-sqlite";
     description = "Mopidy SQLite local library extension";
     license = licenses.asl20;
     maintainers = [ maintainers.rvolosatovs ];
diff --git a/pkgs/applications/audio/mopidy/moped.nix b/pkgs/applications/audio/mopidy/moped.nix
index d41fb12ae8d3..ffd9af76d173 100644
--- a/pkgs/applications/audio/mopidy/moped.nix
+++ b/pkgs/applications/audio/mopidy/moped.nix
@@ -17,7 +17,7 @@ pythonPackages.buildPythonApplication rec {
   doCheck = false;
 
   meta = with stdenv.lib; {
-    homepage = https://github.com/martijnboland/moped;
+    homepage = "https://github.com/martijnboland/moped";
     description = "A web client for Mopidy";
     license = licenses.mit;
     maintainers = [];
diff --git a/pkgs/applications/audio/mopidy/mopify.nix b/pkgs/applications/audio/mopidy/mopify.nix
index b657f69e26ee..a9902ca41721 100644
--- a/pkgs/applications/audio/mopidy/mopify.nix
+++ b/pkgs/applications/audio/mopidy/mopify.nix
@@ -15,7 +15,7 @@ pythonPackages.buildPythonApplication rec {
   doCheck = false;
 
   meta = with stdenv.lib; {
-    homepage = https://github.com/dirkgroenen/mopidy-mopify;
+    homepage = "https://github.com/dirkgroenen/mopidy-mopify";
     description = "A mopidy webclient based on the Spotify webbased interface";
     license = licenses.gpl3;
     maintainers = [ maintainers.Gonzih ];
diff --git a/pkgs/applications/audio/mopidy/spotify.nix b/pkgs/applications/audio/mopidy/spotify.nix
index a01bf6c80d3d..0793ae01c29e 100644
--- a/pkgs/applications/audio/mopidy/spotify.nix
+++ b/pkgs/applications/audio/mopidy/spotify.nix
@@ -14,7 +14,7 @@ python3Packages.buildPythonApplication rec {
   doCheck = false;
 
   meta = with stdenv.lib; {
-    homepage = https://www.mopidy.com/;
+    homepage = "https://www.mopidy.com/";
     description = "Mopidy extension for playing music from Spotify";
     license = licenses.asl20;
     maintainers = [];
diff --git a/pkgs/applications/audio/mp3blaster/default.nix b/pkgs/applications/audio/mp3blaster/default.nix
index 727133be78df..2943a31454a6 100644
--- a/pkgs/applications/audio/mp3blaster/default.nix
+++ b/pkgs/applications/audio/mp3blaster/default.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "An audio player for the text console";
-    homepage = http://www.mp3blaster.org/;
+    homepage = "http://www.mp3blaster.org/";
     license = licenses.gpl2;
     maintainers = with maintainers; [ earldouglas ];
     platforms = platforms.all;
diff --git a/pkgs/applications/audio/mp3gain/default.nix b/pkgs/applications/audio/mp3gain/default.nix
index 233aebfa1470..f2b4564c7ccf 100644
--- a/pkgs/applications/audio/mp3gain/default.nix
+++ b/pkgs/applications/audio/mp3gain/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation {
 
   meta = {
     description = "Lossless mp3 normalizer with statistical analysis";
-    homepage = http://mp3gain.sourceforge.net/;
+    homepage = "http://mp3gain.sourceforge.net/";
     license = stdenv.lib.licenses.lgpl21;
     platforms = stdenv.lib.platforms.linux;
     maintainers = [ stdenv.lib.maintainers.devhell ];
diff --git a/pkgs/applications/audio/mp3info/default.nix b/pkgs/applications/audio/mp3info/default.nix
index 6700f21fc8cc..69ca271d27dd 100644
--- a/pkgs/applications/audio/mp3info/default.nix
+++ b/pkgs/applications/audio/mp3info/default.nix
@@ -35,7 +35,7 @@ stdenv.mkDerivation rec {
          other attributes in a pre-defined or user-specifiable output format.
       '';
 
-    homepage = http://www.ibiblio.org/mp3info/;
+    homepage = "http://www.ibiblio.org/mp3info/";
 
     license = stdenv.lib.licenses.gpl2Plus;
 
diff --git a/pkgs/applications/audio/mp3splt/default.nix b/pkgs/applications/audio/mp3splt/default.nix
index f067c5af6df3..323854575ea7 100644
--- a/pkgs/applications/audio/mp3splt/default.nix
+++ b/pkgs/applications/audio/mp3splt/default.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Utility to split mp3, ogg vorbis and FLAC files without decoding";
-    homepage = https://sourceforge.net/projects/mp3splt/;
+    homepage = "https://sourceforge.net/projects/mp3splt/";
     license = licenses.gpl2;
     maintainers = [ maintainers.bosu ];
     platforms = platforms.unix;
diff --git a/pkgs/applications/audio/mp3val/default.nix b/pkgs/applications/audio/mp3val/default.nix
index 6c35779f6c4c..636fb7d9b9a1 100644
--- a/pkgs/applications/audio/mp3val/default.nix
+++ b/pkgs/applications/audio/mp3val/default.nix
@@ -29,7 +29,7 @@ stdenv.mkDerivation rec {
       also other MPEG versions and layers. The tool is also aware of the most
       common types of tags (ID3v1, ID3v2, APEv2).
     '';
-    homepage = http://mp3val.sourceforge.net/index.shtml;
+    homepage = "http://mp3val.sourceforge.net/index.shtml";
     license = stdenv.lib.licenses.gpl2;
     platforms = stdenv.lib.platforms.unix;
     maintainers = [ stdenv.lib.maintainers.devhell ];
diff --git a/pkgs/applications/audio/mpc/default.nix b/pkgs/applications/audio/mpc/default.nix
index 1e8d73ce560f..a226b720df9b 100644
--- a/pkgs/applications/audio/mpc/default.nix
+++ b/pkgs/applications/audio/mpc/default.nix
@@ -17,7 +17,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "A minimalist command line interface to MPD";
-    homepage = https://www.musicpd.org/clients/mpc/;
+    homepage = "https://www.musicpd.org/clients/mpc/";
     license = licenses.gpl2;
     maintainers = with maintainers; [ algorith ];
     platforms = with platforms; linux ++ darwin;
diff --git a/pkgs/applications/audio/mpc123/default.nix b/pkgs/applications/audio/mpc123/default.nix
index f024e5a6a1d1..ef5cb169a2cf 100644
--- a/pkgs/applications/audio/mpc123/default.nix
+++ b/pkgs/applications/audio/mpc123/default.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
     '';
 
   meta = {
-    homepage = http://mpc123.sourceforge.net/;
+    homepage = "http://mpc123.sourceforge.net/";
 
     description = "A Musepack (.mpc) audio player";
 
diff --git a/pkgs/applications/audio/mpg123/default.nix b/pkgs/applications/audio/mpg123/default.nix
index 6c4b9a431768..53e66e580da8 100644
--- a/pkgs/applications/audio/mpg123/default.nix
+++ b/pkgs/applications/audio/mpg123/default.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "Fast console MPEG Audio Player and decoder library";
-    homepage = http://mpg123.org;
+    homepage = "http://mpg123.org";
     license = stdenv.lib.licenses.lgpl21;
     maintainers = [ stdenv.lib.maintainers.ftrvxmtrx ];
     platforms = stdenv.lib.platforms.unix;
diff --git a/pkgs/applications/audio/mpg321/default.nix b/pkgs/applications/audio/mpg321/default.nix
index 08fe9b4f9af1..63b8e2d867a7 100644
--- a/pkgs/applications/audio/mpg321/default.nix
+++ b/pkgs/applications/audio/mpg321/default.nix
@@ -35,7 +35,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Command-line MP3 player";
-    homepage = http://mpg321.sourceforge.net/;
+    homepage = "http://mpg321.sourceforge.net/";
     license = licenses.gpl2;
     maintainers = [ maintainers.rycee ];
     platforms = platforms.gnu ++ platforms.linux;
diff --git a/pkgs/applications/audio/mup/default.nix b/pkgs/applications/audio/mup/default.nix
index 43098be12e3f..347cddca8564 100644
--- a/pkgs/applications/audio/mup/default.nix
+++ b/pkgs/applications/audio/mup/default.nix
@@ -32,7 +32,7 @@ stdenv.mkDerivation rec {
   enableParallelBuilding = false; # Undeclared dependencies + https://stackoverflow.com/a/19822767/1687334 for prolog.ps.
 
   meta = with stdenv.lib; {
-    homepage = http://www.arkkra.com/;
+    homepage = "http://www.arkkra.com/";
     description = "Music typesetting program (ASCII to PostScript and MIDI)";
     license = licenses.bsd3;
     maintainers = with maintainers; [ orivej ];
diff --git a/pkgs/applications/audio/musescore/darwin.nix b/pkgs/applications/audio/musescore/darwin.nix
index 8b08aed62b8b..8870a144c9f5 100644
--- a/pkgs/applications/audio/musescore/darwin.nix
+++ b/pkgs/applications/audio/musescore/darwin.nix
@@ -25,10 +25,10 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Music notation and composition software";
-    homepage = https://musescore.org/;
+    homepage = "https://musescore.org/";
     license = licenses.gpl2;
     platforms = platforms.darwin;
     maintainers = with maintainers; [ yurrriq ];
-    repositories.git = https://github.com/musescore/MuseScore;
+    repositories.git = "https://github.com/musescore/MuseScore";
   };
 }
diff --git a/pkgs/applications/audio/musescore/default.nix b/pkgs/applications/audio/musescore/default.nix
index 7ef6328c02c2..bd4b2db380a3 100644
--- a/pkgs/applications/audio/musescore/default.nix
+++ b/pkgs/applications/audio/musescore/default.nix
@@ -31,10 +31,10 @@ mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Music notation and composition software";
-    homepage = https://musescore.org/;
+    homepage = "https://musescore.org/";
     license = licenses.gpl2;
     maintainers = with maintainers; [ vandenoever ];
     platforms = platforms.linux;
-    repositories.git = https://github.com/musescore/MuseScore;
+    repositories.git = "https://github.com/musescore/MuseScore";
   };
 }
diff --git a/pkgs/applications/audio/musly/default.nix b/pkgs/applications/audio/musly/default.nix
index e7a9e22c2d68..b1e8822cdcf8 100644
--- a/pkgs/applications/audio/musly/default.nix
+++ b/pkgs/applications/audio/musly/default.nix
@@ -17,7 +17,7 @@ stdenv.mkDerivation {
   '' else "";
 
   meta = with stdenv.lib; {
-    homepage = https://www.musly.org;
+    homepage = "https://www.musly.org";
     description = "A fast and high-quality audio music similarity library written in C/C++";
     longDescription = ''
       Musly analyzes the the audio signal of music pieces to estimate their similarity.
diff --git a/pkgs/applications/audio/ncmpc/default.nix b/pkgs/applications/audio/ncmpc/default.nix
index c95177cd3821..c08e4f7f4ffa 100644
--- a/pkgs/applications/audio/ncmpc/default.nix
+++ b/pkgs/applications/audio/ncmpc/default.nix
@@ -30,7 +30,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Curses-based interface for MPD (music player daemon)";
-    homepage    = https://www.musicpd.org/clients/ncmpc/;
+    homepage    = "https://www.musicpd.org/clients/ncmpc/";
     license     = licenses.gpl2Plus;
     platforms   = platforms.all;
     maintainers = with maintainers; [ fpletz ];
diff --git a/pkgs/applications/audio/ncmpcpp/default.nix b/pkgs/applications/audio/ncmpcpp/default.nix
index 2ba36b4a50d9..f8adc522fcb5 100644
--- a/pkgs/applications/audio/ncmpcpp/default.nix
+++ b/pkgs/applications/audio/ncmpcpp/default.nix
@@ -33,7 +33,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "A featureful ncurses based MPD client inspired by ncmpc";
-    homepage    = https://ncmpcpp.rybczak.net/;
+    homepage    = "https://ncmpcpp.rybczak.net/";
     license     = licenses.gpl2Plus;
     maintainers = with maintainers; [ jfrankenau koral lovek323 ];
     platforms   = platforms.all;
diff --git a/pkgs/applications/audio/ncpamixer/default.nix b/pkgs/applications/audio/ncpamixer/default.nix
index 53ed9b3297c1..32d8df2f0487 100644
--- a/pkgs/applications/audio/ncpamixer/default.nix
+++ b/pkgs/applications/audio/ncpamixer/default.nix
@@ -25,7 +25,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "An ncurses mixer for PulseAudio inspired by pavucontrol";
-    homepage = https://github.com/fulhax/ncpamixer;
+    homepage = "https://github.com/fulhax/ncpamixer";
     license = licenses.mit;
     platforms = platforms.linux;
     maintainers = with maintainers; [ StijnDW ];
diff --git a/pkgs/applications/audio/netease-cloud-music/default.nix b/pkgs/applications/audio/netease-cloud-music/default.nix
index 15afe233b3ab..c4cc291d026c 100644
--- a/pkgs/applications/audio/netease-cloud-music/default.nix
+++ b/pkgs/applications/audio/netease-cloud-music/default.nix
@@ -73,7 +73,7 @@ in stdenv.mkDerivation rec {
 
   meta = {
     description = "Client for Netease Cloud Music service";
-    homepage = https://music.163.com;
+    homepage = "https://music.163.com";
     platforms = [ "i686-linux" "x86_64-linux" ];
     maintainers = [ stdenv.lib.maintainers.mlatus ];
     license = stdenv.lib.licenses.unfreeRedistributable;
diff --git a/pkgs/applications/audio/noise-repellent/default.nix b/pkgs/applications/audio/noise-repellent/default.nix
index bc5b35396e23..3b2f233c6afe 100644
--- a/pkgs/applications/audio/noise-repellent/default.nix
+++ b/pkgs/applications/audio/noise-repellent/default.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "An lv2 plugin for broadband noise reduction";
-    homepage    = https://github.com/lucianodato/noise-repellent;
+    homepage    = "https://github.com/lucianodato/noise-repellent";
     license     = licenses.gpl3;
     maintainers = [ maintainers.magnetophon ];
     platforms = [ "x86_64-linux" "i686-linux" "x86_64-darwin" "i686-darwin"  ];
diff --git a/pkgs/applications/audio/non/default.nix b/pkgs/applications/audio/non/default.nix
index 651db50f0a7b..9b4b147c2304 100644
--- a/pkgs/applications/audio/non/default.nix
+++ b/pkgs/applications/audio/non/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation {
 
   meta = {
     description = "Lightweight and lightning fast modular Digital Audio Workstation";
-    homepage = http://non.tuxfamily.org;
+    homepage = "http://non.tuxfamily.org";
     license = stdenv.lib.licenses.lgpl21;
     platforms = stdenv.lib.platforms.linux;
     maintainers = [ stdenv.lib.maintainers.nico202 ];
diff --git a/pkgs/applications/audio/nootka/default.nix b/pkgs/applications/audio/nootka/default.nix
index 4f7b1e7e30f7..b0d4843aecd5 100644
--- a/pkgs/applications/audio/nootka/default.nix
+++ b/pkgs/applications/audio/nootka/default.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Application for practicing playing musical scores and ear training";
-    homepage = https://nootka.sourceforge.io/;
+    homepage = "https://nootka.sourceforge.io/";
     license = licenses.gpl3Plus;
     maintainers = with maintainers; [ orivej ];
     platforms = platforms.linux;
diff --git a/pkgs/applications/audio/nootka/unstable.nix b/pkgs/applications/audio/nootka/unstable.nix
index d76fd0835caa..16df55c1dfba 100644
--- a/pkgs/applications/audio/nootka/unstable.nix
+++ b/pkgs/applications/audio/nootka/unstable.nix
@@ -25,7 +25,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Application for practicing playing musical scores and ear training";
-    homepage = https://nootka.sourceforge.io/;
+    homepage = "https://nootka.sourceforge.io/";
     license = licenses.gpl3Plus;
     maintainers = with maintainers; [ orivej ];
     platforms = platforms.linux;
diff --git a/pkgs/applications/audio/normalize/default.nix b/pkgs/applications/audio/normalize/default.nix
index 490ecc967bbf..0aa264116932 100644
--- a/pkgs/applications/audio/normalize/default.nix
+++ b/pkgs/applications/audio/normalize/default.nix
@@ -12,7 +12,7 @@ stdenv.mkDerivation rec {
   buildInputs = [ libmad ];
 
   meta = with stdenv.lib; {
-    homepage = https://www.nongnu.org/normalize/;
+    homepage = "https://www.nongnu.org/normalize/";
     description = "Audio file normalizer";
     license = licenses.gpl2;
     platforms = platforms.unix;
diff --git a/pkgs/applications/audio/nova-filters/default.nix b/pkgs/applications/audio/nova-filters/default.nix
index 0bb970500bdc..bc5a3efc59a3 100644
--- a/pkgs/applications/audio/nova-filters/default.nix
+++ b/pkgs/applications/audio/nova-filters/default.nix
@@ -5,7 +5,7 @@ stdenv.mkDerivation {
   pname = "nova-filters";
 
   src = fetchurl {
-    url = https://klingt.org/~tim/nova-filters/nova-filters_0.2-2.tar.gz;
+    url = "https://klingt.org/~tim/nova-filters/nova-filters_0.2-2.tar.gz";
     sha256 = "16064vvl2w5lz4xi3lyjk4xx7fphwsxc14ajykvndiz170q32s6i";
   };
 
@@ -23,7 +23,7 @@ stdenv.mkDerivation {
 
   meta = with stdenv.lib; {
     description = "LADSPA plugins based on filters of nova";
-    homepage = http://klingt.org/~tim/nova-filters/;
+    homepage = "http://klingt.org/~tim/nova-filters/";
     license = licenses.gpl2Plus;
     maintainers = [ maintainers.magnetophon ];
     platforms = platforms.linux;
diff --git a/pkgs/applications/audio/openmpt123/default.nix b/pkgs/applications/audio/openmpt123/default.nix
index 24ac52e7e311..aebc7dc7baa7 100644
--- a/pkgs/applications/audio/openmpt123/default.nix
+++ b/pkgs/applications/audio/openmpt123/default.nix
@@ -23,7 +23,7 @@ in stdenv.mkDerivation {
 
   meta = with stdenv.lib; {
     description = "A cross-platform command-line based module file player";
-    homepage = https://lib.openmpt.org/libopenmpt/;
+    homepage = "https://lib.openmpt.org/libopenmpt/";
     license = licenses.bsd3;
     maintainers = with maintainers; [ gnidorah ];
     platforms = platforms.linux;
diff --git a/pkgs/applications/audio/opus-tools/default.nix b/pkgs/applications/audio/opus-tools/default.nix
index 69fa75d85f4d..9d95c362d928 100644
--- a/pkgs/applications/audio/opus-tools/default.nix
+++ b/pkgs/applications/audio/opus-tools/default.nix
@@ -12,7 +12,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "Tools to work with opus encoded audio streams";
-    homepage = http://www.opus-codec.org/;
+    homepage = "http://www.opus-codec.org/";
     license = stdenv.lib.licenses.bsd2;
     maintainers = with stdenv.lib.maintainers; [ ];
     platforms = with stdenv.lib.platforms; unix;
diff --git a/pkgs/applications/audio/opusfile/default.nix b/pkgs/applications/audio/opusfile/default.nix
index 25636863793f..c09b3f415d86 100644
--- a/pkgs/applications/audio/opusfile/default.nix
+++ b/pkgs/applications/audio/opusfile/default.nix
@@ -15,7 +15,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "High-level API for decoding and seeking in .opus files";
-    homepage = http://www.opus-codec.org/;
+    homepage = "http://www.opus-codec.org/";
     license = licenses.bsd3;
     platforms = platforms.linux ++ platforms.darwin;
     maintainers = with maintainers; [ ];
diff --git a/pkgs/applications/audio/pamix/default.nix b/pkgs/applications/audio/pamix/default.nix
index 2507f08e9e59..cc5d84d9471b 100644
--- a/pkgs/applications/audio/pamix/default.nix
+++ b/pkgs/applications/audio/pamix/default.nix
@@ -22,7 +22,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Pulseaudio terminal mixer";
-    homepage    = https://github.com/patroclos/PAmix;
+    homepage    = "https://github.com/patroclos/PAmix";
     license     = licenses.mit;
     platforms   = platforms.linux;
     maintainers = with maintainers; [ ericsagnes ];
diff --git a/pkgs/applications/audio/pamixer/default.nix b/pkgs/applications/audio/pamixer/default.nix
index 7c4520967850..71d852485991 100644
--- a/pkgs/applications/audio/pamixer/default.nix
+++ b/pkgs/applications/audio/pamixer/default.nix
@@ -28,7 +28,7 @@ stdenv.mkDerivation rec {
         - Increase / Decrease the volume for a device
         - Mute or unmute a device
     '';
-    homepage = https://github.com/cdemoulins/pamixer;
+    homepage = "https://github.com/cdemoulins/pamixer";
     license = licenses.gpl3;
     platforms = platforms.linux;
   };
diff --git a/pkgs/applications/audio/paprefs/default.nix b/pkgs/applications/audio/paprefs/default.nix
index 9c59b5466c74..b5ec1206ce3d 100644
--- a/pkgs/applications/audio/paprefs/default.nix
+++ b/pkgs/applications/audio/paprefs/default.nix
@@ -40,7 +40,7 @@ stdenv.mkDerivation rec {
       dialog for the PulseAudio sound server.
     '';
 
-    homepage = http://freedesktop.org/software/pulseaudio/paprefs/;
+    homepage = "http://freedesktop.org/software/pulseaudio/paprefs/";
 
     license = licenses.gpl2Plus;
 
diff --git a/pkgs/applications/audio/patchage/default.nix b/pkgs/applications/audio/patchage/default.nix
index e7c4cab9af18..ac679d6dd949 100644
--- a/pkgs/applications/audio/patchage/default.nix
+++ b/pkgs/applications/audio/patchage/default.nix
@@ -6,7 +6,7 @@ stdenv.mkDerivation {
   pname = "patchage";
   version = "1.0.1";
   src = fetchsvn {
-    url = http://svn.drobilla.net/lad/trunk/patchage/;
+    url = "http://svn.drobilla.net/lad/trunk/patchage/";
     rev = "5821";
     sha256 = "1ar64l0sg468qzxj7i6ppgfqjpm92awcp5lzskamrf3ln17lrgj7";
   };
@@ -18,7 +18,7 @@ stdenv.mkDerivation {
 
   meta = {
     description = "Modular patch bay for Jack and ALSA systems";
-    homepage = http://non.tuxfamily.org;
+    homepage = "http://non.tuxfamily.org";
     license = stdenv.lib.licenses.lgpl3;
     platforms = stdenv.lib.platforms.linux;
     maintainers = [ stdenv.lib.maintainers.nico202 ];
diff --git a/pkgs/applications/audio/paulstretch/default.nix b/pkgs/applications/audio/paulstretch/default.nix
index b9a3f39affb1..f6cee7672f7c 100644
--- a/pkgs/applications/audio/paulstretch/default.nix
+++ b/pkgs/applications/audio/paulstretch/default.nix
@@ -52,7 +52,7 @@ stdenv.mkDerivation {
       special effects by "spectral smoothing" the sounds.
       It can transform any sound/music to a texture.
     '';
-    homepage = http://hypermammut.sourceforge.net/paulstretch/;
+    homepage = "http://hypermammut.sourceforge.net/paulstretch/";
     platforms = platforms.linux;
     license = licenses.gpl2;
   };
diff --git a/pkgs/applications/audio/pavucontrol/default.nix b/pkgs/applications/audio/pavucontrol/default.nix
index d07cf8a476b5..301e44168d39 100644
--- a/pkgs/applications/audio/pavucontrol/default.nix
+++ b/pkgs/applications/audio/pavucontrol/default.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation rec {
       easily control the volume of all clients, sinks, etc.
     '';
 
-    homepage = http://freedesktop.org/software/pulseaudio/pavucontrol/;
+    homepage = "http://freedesktop.org/software/pulseaudio/pavucontrol/";
 
     license = stdenv.lib.licenses.gpl2Plus;
 
diff --git a/pkgs/applications/audio/pd-plugins/cyclone/default.nix b/pkgs/applications/audio/pd-plugins/cyclone/default.nix
index 6440f6e787ff..56f1ec518de0 100644
--- a/pkgs/applications/audio/pd-plugins/cyclone/default.nix
+++ b/pkgs/applications/audio/pd-plugins/cyclone/default.nix
@@ -25,7 +25,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "A library of PureData classes, bringing some level of compatibility between Max/MSP and Pd environments";
-    homepage = http://puredata.info/downloads/cyclone;
+    homepage = "http://puredata.info/downloads/cyclone";
     license = stdenv.lib.licenses.tcltk;
     maintainers = [ stdenv.lib.maintainers.magnetophon ];
     platforms = stdenv.lib.platforms.linux;
diff --git a/pkgs/applications/audio/pd-plugins/helmholtz/default.nix b/pkgs/applications/audio/pd-plugins/helmholtz/default.nix
index 6c7a4b03ef59..be5a385d3088 100644
--- a/pkgs/applications/audio/pd-plugins/helmholtz/default.nix
+++ b/pkgs/applications/audio/pd-plugins/helmholtz/default.nix
@@ -38,7 +38,7 @@ stdenv.mkDerivation {
 
   meta = {
     description = "Time domain pitch tracker for Pure Data";
-    homepage = http://www.katjaas.nl/helmholtz/helmholtz.html;
+    homepage = "http://www.katjaas.nl/helmholtz/helmholtz.html";
     license = stdenv.lib.licenses.bsd3;
     maintainers = [ stdenv.lib.maintainers.magnetophon ];
     platforms = stdenv.lib.platforms.linux;
diff --git a/pkgs/applications/audio/pd-plugins/maxlib/default.nix b/pkgs/applications/audio/pd-plugins/maxlib/default.nix
index 21ba375200bc..aec793c4ee8a 100644
--- a/pkgs/applications/audio/pd-plugins/maxlib/default.nix
+++ b/pkgs/applications/audio/pd-plugins/maxlib/default.nix
@@ -25,7 +25,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "A library of non-tilde externals for puredata, by Miller Puckette";
-    homepage = http://puredata.info/downloads/maxlib;
+    homepage = "http://puredata.info/downloads/maxlib";
     license = stdenv.lib.licenses.gpl2;
     maintainers = [ stdenv.lib.maintainers.magnetophon ];
     platforms = stdenv.lib.platforms.linux;
diff --git a/pkgs/applications/audio/pd-plugins/mrpeach/default.nix b/pkgs/applications/audio/pd-plugins/mrpeach/default.nix
index 028a4667cb2d..cefee430ad5f 100644
--- a/pkgs/applications/audio/pd-plugins/mrpeach/default.nix
+++ b/pkgs/applications/audio/pd-plugins/mrpeach/default.nix
@@ -54,7 +54,7 @@ stdenv.mkDerivation {
 
   meta = {
     description = "A collection of Pd objectclasses for OSC-messages";
-    homepage = http://puredata.info/downloads/osc;
+    homepage = "http://puredata.info/downloads/osc";
     license = stdenv.lib.licenses.gpl2;
     maintainers = [ stdenv.lib.maintainers.magnetophon ];
     platforms = stdenv.lib.platforms.linux;
diff --git a/pkgs/applications/audio/pd-plugins/puremapping/default.nix b/pkgs/applications/audio/pd-plugins/puremapping/default.nix
index c214d3fcf405..7a5014664d55 100644
--- a/pkgs/applications/audio/pd-plugins/puremapping/default.nix
+++ b/pkgs/applications/audio/pd-plugins/puremapping/default.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "Set of externals to facilitate the use of sensors within Pure Data and to create complex relations between input and output of a dynamic system";
-    homepage = http://www.chnry.net/ch/?090-Pure-Mapping&lang=en;
+    homepage = "http://www.chnry.net/ch/?090-Pure-Mapping&lang=en";
     license = stdenv.lib.licenses.gpl1;
     maintainers = [ stdenv.lib.maintainers.magnetophon ];
     platforms = stdenv.lib.platforms.linux;
diff --git a/pkgs/applications/audio/pd-plugins/timbreid/default.nix b/pkgs/applications/audio/pd-plugins/timbreid/default.nix
index fa9660fbbf61..e68610a02269 100644
--- a/pkgs/applications/audio/pd-plugins/timbreid/default.nix
+++ b/pkgs/applications/audio/pd-plugins/timbreid/default.nix
@@ -37,7 +37,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "A collection of audio feature analysis externals for puredata";
-    homepage = http://williambrent.conflations.com/pages/research.html;
+    homepage = "http://williambrent.conflations.com/pages/research.html";
     license = stdenv.lib.licenses.gpl3;
     maintainers = [ stdenv.lib.maintainers.magnetophon ];
     platforms = stdenv.lib.platforms.linux;
diff --git a/pkgs/applications/audio/pd-plugins/zexy/default.nix b/pkgs/applications/audio/pd-plugins/zexy/default.nix
index cc307417c061..4f8269081362 100644
--- a/pkgs/applications/audio/pd-plugins/zexy/default.nix
+++ b/pkgs/applications/audio/pd-plugins/zexy/default.nix
@@ -28,7 +28,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "The swiss army knife for puredata";
-    homepage = http://puredata.info/downloads/zexy;
+    homepage = "http://puredata.info/downloads/zexy";
     license = stdenv.lib.licenses.gpl2;
     maintainers = [ stdenv.lib.maintainers.magnetophon ];
     platforms = stdenv.lib.platforms.linux;
diff --git a/pkgs/applications/audio/petrifoo/default.nix b/pkgs/applications/audio/petrifoo/default.nix
index 8bbeffb1f7a3..322eba2b9521 100644
--- a/pkgs/applications/audio/petrifoo/default.nix
+++ b/pkgs/applications/audio/petrifoo/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation  rec {
   meta = with stdenv.lib; {
     description = "MIDI controllable audio sampler";
     longDescription = "a fork of Specimen";
-    homepage = http://petri-foo.sourceforge.net;
+    homepage = "http://petri-foo.sourceforge.net";
     license = licenses.gpl2Plus;
     platforms = platforms.linux;
     maintainers = [ maintainers.goibhniu ];
diff --git a/pkgs/applications/audio/pianobooster/default.nix b/pkgs/applications/audio/pianobooster/default.nix
index bbf64a4325b0..4832fce1e962 100644
--- a/pkgs/applications/audio/pianobooster/default.nix
+++ b/pkgs/applications/audio/pianobooster/default.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "A MIDI file player that teaches you how to play the piano";
-    homepage = https://github.com/captnfab/PianoBooster;
+    homepage = "https://github.com/captnfab/PianoBooster";
     license = licenses.gpl3Plus;
     platforms = platforms.linux;
     maintainers = with maintainers; [ goibhniu orivej ];
diff --git a/pkgs/applications/audio/pithos/default.nix b/pkgs/applications/audio/pithos/default.nix
index 20a6e928cefb..6c3ffebc8c95 100644
--- a/pkgs/applications/audio/pithos/default.nix
+++ b/pkgs/applications/audio/pithos/default.nix
@@ -29,7 +29,7 @@ pythonPackages.buildPythonApplication rec {
 
   meta = with stdenv.lib; {
     description = "Pandora Internet Radio player for GNOME";
-    homepage = https://pithos.github.io/;
+    homepage = "https://pithos.github.io/";
     license = licenses.gpl3;
     maintainers = with maintainers; [ obadz ];
   };
diff --git a/pkgs/applications/audio/playbar2/default.nix b/pkgs/applications/audio/playbar2/default.nix
index 8c21dc8f2ad7..15385e91927c 100644
--- a/pkgs/applications/audio/playbar2/default.nix
+++ b/pkgs/applications/audio/playbar2/default.nix
@@ -29,7 +29,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Mpris2 Client for Plasma5";
-    homepage = https://github.com/audoban/PlayBar2;
+    homepage = "https://github.com/audoban/PlayBar2";
     license = licenses.gpl3;
     platforms = platforms.linux;
     maintainers = with maintainers; [ pjones ];
diff --git a/pkgs/applications/audio/plugin-torture/default.nix b/pkgs/applications/audio/plugin-torture/default.nix
index f444ad6cb323..3c852cf450e9 100644
--- a/pkgs/applications/audio/plugin-torture/default.nix
+++ b/pkgs/applications/audio/plugin-torture/default.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation {
   '';
 
   meta = with stdenv.lib; {
-    homepage = https://github.com/cth103/plugin-torture;
+    homepage = "https://github.com/cth103/plugin-torture";
     description = "A tool to test LADSPA and LV2 plugins";
     license = licenses.gpl2;
     maintainers = [ maintainers.magnetophon ];
diff --git a/pkgs/applications/audio/pmidi/default.nix b/pkgs/applications/audio/pmidi/default.nix
index f9b3fbae2137..0da86ca9bd1a 100644
--- a/pkgs/applications/audio/pmidi/default.nix
+++ b/pkgs/applications/audio/pmidi/default.nix
@@ -14,7 +14,7 @@ stdenv.mkDerivation {
   buildInputs = [ alsaLib ];
 
   meta = with stdenv.lib; {
-    homepage = http://www.parabola.me.uk/alsa/pmidi.html;
+    homepage = "http://www.parabola.me.uk/alsa/pmidi.html";
     description = "A straightforward command line program to play midi files through the ALSA sequencer";
     maintainers = with maintainers; [ lheckemann ];
     license = licenses.gpl2;
diff --git a/pkgs/applications/audio/ponymix/default.nix b/pkgs/applications/audio/ponymix/default.nix
index 6d168ec56618..6c289a97384f 100644
--- a/pkgs/applications/audio/ponymix/default.nix
+++ b/pkgs/applications/audio/ponymix/default.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "CLI PulseAudio Volume Control";
-    homepage = https://github.com/falconindy/ponymix;
+    homepage = "https://github.com/falconindy/ponymix";
     license = licenses.mit;
     platforms = platforms.linux;
     maintainers = with maintainers; [ ericsagnes ];
diff --git a/pkgs/applications/audio/praat/default.nix b/pkgs/applications/audio/praat/default.nix
index 9414f4211d7a..2fb8e30a64d8 100644
--- a/pkgs/applications/audio/praat/default.nix
+++ b/pkgs/applications/audio/praat/default.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "Doing phonetics by computer";
-    homepage = http://www.fon.hum.uva.nl/praat/;
+    homepage = "http://www.fon.hum.uva.nl/praat/";
     license = stdenv.lib.licenses.gpl2Plus; # Has some 3rd-party code in it though
     platforms = stdenv.lib.platforms.linux;
   };
diff --git a/pkgs/applications/audio/projectm/default.nix b/pkgs/applications/audio/projectm/default.nix
index 347774010ae1..205a3ad287e9 100644
--- a/pkgs/applications/audio/projectm/default.nix
+++ b/pkgs/applications/audio/projectm/default.nix
@@ -14,7 +14,7 @@ stdenv.mkDerivation {
 
   meta = {
     description = "Music Visualizer";
-    homepage = http://projectm.sourceforge.net/;
+    homepage = "http://projectm.sourceforge.net/";
     license = stdenv.lib.licenses.lgpl21Plus;
     platforms = stdenv.lib.platforms.linux;
   };
@@ -25,7 +25,7 @@ stdenv.mkDerivation {
   };
 
   patch_gcc6 = fetchpatch {
-    url = https://raw.githubusercontent.com/gentoo/gentoo/45abd63abc6644b6e177c057b5b42d894dbf8e29/media-libs/libprojectm/files/libprojectm-2.1.0-fix-c++14.patch;
+    url = "https://raw.githubusercontent.com/gentoo/gentoo/45abd63abc6644b6e177c057b5b42d894dbf8e29/media-libs/libprojectm/files/libprojectm-2.1.0-fix-c++14.patch";
     sha256 = "1i50scxv1jlqvb3jm3sql89a7wqckxhlpvnhz20vvmm1kii6lrsn";
   };
 
diff --git a/pkgs/applications/audio/puddletag/default.nix b/pkgs/applications/audio/puddletag/default.nix
index 3a6cd298557f..a0813fa0c801 100644
--- a/pkgs/applications/audio/puddletag/default.nix
+++ b/pkgs/applications/audio/puddletag/default.nix
@@ -29,7 +29,7 @@ python2Packages.buildPythonApplication rec {
 
   meta = with stdenv.lib; {
     description = "An audio tag editor similar to the Windows program, Mp3tag";
-    homepage    = https://docs.puddletag.net;
+    homepage    = "https://docs.puddletag.net";
     license     = licenses.gpl3;
     maintainers = with maintainers; [ peterhoeg ];
     platforms   = platforms.linux;
diff --git a/pkgs/applications/audio/pulseaudio-ctl/default.nix b/pkgs/applications/audio/pulseaudio-ctl/default.nix
index 6b7d242e1f6d..125dafc132e0 100644
--- a/pkgs/applications/audio/pulseaudio-ctl/default.nix
+++ b/pkgs/applications/audio/pulseaudio-ctl/default.nix
@@ -33,7 +33,7 @@ in stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Control pulseaudio volume from the shell or mapped to keyboard shortcuts. No need for alsa-utils.";
-    homepage = https://bbs.archlinux.org/viewtopic.php?id=124513;
+    homepage = "https://bbs.archlinux.org/viewtopic.php?id=124513";
     license = licenses.mit;
     maintainers = with maintainers; [ peterhoeg ];
     platforms = platforms.linux;
diff --git a/pkgs/applications/audio/pulseaudio-dlna/zeroconf.nix b/pkgs/applications/audio/pulseaudio-dlna/zeroconf.nix
index 328bd8b0b041..efe39aa1600e 100644
--- a/pkgs/applications/audio/pulseaudio-dlna/zeroconf.nix
+++ b/pkgs/applications/audio/pulseaudio-dlna/zeroconf.nix
@@ -23,7 +23,7 @@ buildPythonPackage rec {
 
   meta = with stdenv.lib; {
     description = "A pure python implementation of multicast DNS service discovery";
-    homepage = https://github.com/jstasiak/python-zeroconf;
+    homepage = "https://github.com/jstasiak/python-zeroconf";
     license = licenses.lgpl21;
     maintainers = [ ];
   };
diff --git a/pkgs/applications/audio/pulseaudio-modules-bt/default.nix b/pkgs/applications/audio/pulseaudio-modules-bt/default.nix
index b8082c12c644..2511cf0f20a5 100644
--- a/pkgs/applications/audio/pulseaudio-modules-bt/default.nix
+++ b/pkgs/applications/audio/pulseaudio-modules-bt/default.nix
@@ -75,7 +75,7 @@ in stdenv.mkDerivation rec {
   '';
 
   meta = with stdenv.lib; {
-    homepage = https://github.com/EHfive/pulseaudio-modules-bt;
+    homepage = "https://github.com/EHfive/pulseaudio-modules-bt";
     description = "LDAC, aptX, aptX HD, AAC codecs (A2DP Audio) support for Linux PulseAudio";
     platforms = platforms.linux;
     license = licenses.mit;
diff --git a/pkgs/applications/audio/pulseeffects/default.nix b/pkgs/applications/audio/pulseeffects/default.nix
index 82dd0223bc80..2972849a2d41 100644
--- a/pkgs/applications/audio/pulseeffects/default.nix
+++ b/pkgs/applications/audio/pulseeffects/default.nix
@@ -101,7 +101,7 @@ in stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Limiter, compressor, reverberation, equalizer and auto volume effects for Pulseaudio applications";
-    homepage = https://github.com/wwmm/pulseeffects;
+    homepage = "https://github.com/wwmm/pulseeffects";
     license = licenses.gpl3;
     maintainers = with maintainers; [ jtojnar ];
     platforms = platforms.linux;
diff --git a/pkgs/applications/audio/puredata/default.nix b/pkgs/applications/audio/puredata/default.nix
index 5886a465409a..9880a65d0cac 100644
--- a/pkgs/applications/audio/puredata/default.nix
+++ b/pkgs/applications/audio/puredata/default.nix
@@ -30,7 +30,7 @@ stdenv.mkDerivation  rec {
   meta = with stdenv.lib; {
     description = ''A real-time graphical programming environment for
                     audio, video, and graphical processing'';
-    homepage = http://puredata.info;
+    homepage = "http://puredata.info";
     license = licenses.bsd3;
     platforms = platforms.linux;
     maintainers = [ maintainers.goibhniu ];
diff --git a/pkgs/applications/audio/qjackctl/default.nix b/pkgs/applications/audio/qjackctl/default.nix
index 753f6fe8206e..54bbbf053773 100644
--- a/pkgs/applications/audio/qjackctl/default.nix
+++ b/pkgs/applications/audio/qjackctl/default.nix
@@ -26,7 +26,7 @@ mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "A Qt application to control the JACK sound server daemon";
-    homepage = http://qjackctl.sourceforge.net/;
+    homepage = "http://qjackctl.sourceforge.net/";
     license = licenses.gpl2Plus;
     maintainers = [ maintainers.goibhniu ];
     platforms = platforms.linux;
diff --git a/pkgs/applications/audio/qmidinet/default.nix b/pkgs/applications/audio/qmidinet/default.nix
index 2b79818543f8..10cbcb5d5b19 100644
--- a/pkgs/applications/audio/qmidinet/default.nix
+++ b/pkgs/applications/audio/qmidinet/default.nix
@@ -17,7 +17,7 @@ mkDerivation rec {
 
   meta = with lib; {
     description = "A MIDI network gateway application that sends and receives MIDI data (ALSA Sequencer and/or JACK MIDI) over the network";
-    homepage = http://qmidinet.sourceforge.net/;
+    homepage = "http://qmidinet.sourceforge.net/";
     license = licenses.gpl2Plus;
     maintainers = [ maintainers.magnetophon ];
     platforms = platforms.linux;
diff --git a/pkgs/applications/audio/qmmp/default.nix b/pkgs/applications/audio/qmmp/default.nix
index 6cc731710b7f..fe7b9f8ba66e 100644
--- a/pkgs/applications/audio/qmmp/default.nix
+++ b/pkgs/applications/audio/qmmp/default.nix
@@ -59,6 +59,6 @@ mkDerivation rec {
     license = licenses.gpl2;
     platforms = platforms.linux;
     maintainers = [ maintainers.bjornfor ];
-    repositories.svn = http://qmmp.googlecode.com/svn/;
+    repositories.svn = "http://qmmp.googlecode.com/svn/";
   };
 }
diff --git a/pkgs/applications/audio/qsampler/default.nix b/pkgs/applications/audio/qsampler/default.nix
index 33411002c23b..1f65b3748381 100644
--- a/pkgs/applications/audio/qsampler/default.nix
+++ b/pkgs/applications/audio/qsampler/default.nix
@@ -18,7 +18,7 @@ mkDerivation rec {
   enableParallelBuilding = true;
 
   meta = with stdenv.lib; {
-    homepage = http://www.linuxsampler.org;
+    homepage = "http://www.linuxsampler.org";
     description = "Graphical frontend to LinuxSampler";
     license = licenses.gpl2;
     maintainers = [ maintainers.goibhniu ];
diff --git a/pkgs/applications/audio/qsynth/default.nix b/pkgs/applications/audio/qsynth/default.nix
index 29f5704c7302..8235a2835fb6 100644
--- a/pkgs/applications/audio/qsynth/default.nix
+++ b/pkgs/applications/audio/qsynth/default.nix
@@ -19,7 +19,7 @@ mkDerivation  rec {
 
   meta = with stdenv.lib; {
     description = "Fluidsynth GUI";
-    homepage = https://sourceforge.net/projects/qsynth;
+    homepage = "https://sourceforge.net/projects/qsynth";
     license = licenses.gpl2Plus;
     maintainers = with maintainers; [ goibhniu ];
     platforms = platforms.linux;
diff --git a/pkgs/applications/audio/qtractor/default.nix b/pkgs/applications/audio/qtractor/default.nix
index 8cb9f8dccb84..523a743ef3bb 100644
--- a/pkgs/applications/audio/qtractor/default.nix
+++ b/pkgs/applications/audio/qtractor/default.nix
@@ -27,7 +27,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Audio/MIDI multi-track sequencer";
-    homepage = http://qtractor.sourceforge.net;
+    homepage = "http://qtractor.sourceforge.net";
     license = licenses.gpl2Plus;
     platforms = platforms.linux;
     maintainers = [ maintainers.goibhniu ];
diff --git a/pkgs/applications/audio/qtscrobbler/default.nix b/pkgs/applications/audio/qtscrobbler/default.nix
index 68e8e6402acf..5b84989a7c41 100644
--- a/pkgs/applications/audio/qtscrobbler/default.nix
+++ b/pkgs/applications/audio/qtscrobbler/default.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation rec {
       It is able to gather this information from Apple iPods or DAPs running the Rockbox replacement firmware.
     '';
 
-    homepage = http://qtscrob.sourceforge.net;
+    homepage = "http://qtscrob.sourceforge.net";
     license = licenses.gpl2;
     maintainers = [ maintainers.vanzef ];
     platforms = platforms.linux;
diff --git a/pkgs/applications/audio/quodlibet/default.nix b/pkgs/applications/audio/quodlibet/default.nix
index 597cf68f4d09..704e20cc8c56 100644
--- a/pkgs/applications/audio/quodlibet/default.nix
+++ b/pkgs/applications/audio/quodlibet/default.nix
@@ -74,6 +74,6 @@ python3.pkgs.buildPythonApplication rec {
     '';
 
     maintainers = with maintainers; [ coroa sauyon ];
-    homepage = https://quodlibet.readthedocs.io/en/latest/;
+    homepage = "https://quodlibet.readthedocs.io/en/latest/";
   };
 }
diff --git a/pkgs/applications/audio/radiotray-ng/default.nix b/pkgs/applications/audio/radiotray-ng/default.nix
index a64e407b39b8..014906594a7d 100644
--- a/pkgs/applications/audio/radiotray-ng/default.nix
+++ b/pkgs/applications/audio/radiotray-ng/default.nix
@@ -92,7 +92,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "An internet radio player for linux";
-    homepage = https://github.com/ebruck/radiotray-ng;
+    homepage = "https://github.com/ebruck/radiotray-ng";
     license = licenses.gpl3;
     maintainers = with maintainers; [ dtzWill ];
     platforms = platforms.all;
diff --git a/pkgs/applications/audio/rakarrack/default.nix b/pkgs/applications/audio/rakarrack/default.nix
index 36302458a75b..4548f9ba624f 100644
--- a/pkgs/applications/audio/rakarrack/default.nix
+++ b/pkgs/applications/audio/rakarrack/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation  rec {
 
   meta = with stdenv.lib; {
     description = "Multi-effects processor emulating a guitar effects pedalboard";
-    homepage = http://rakarrack.sourceforge.net;
+    homepage = "http://rakarrack.sourceforge.net";
     license = licenses.gpl2;
     platforms = platforms.linux;
     maintainers = [ maintainers.goibhniu ];
diff --git a/pkgs/applications/audio/reaper/default.nix b/pkgs/applications/audio/reaper/default.nix
index 236c42b52930..2e63a3e8c7cd 100644
--- a/pkgs/applications/audio/reaper/default.nix
+++ b/pkgs/applications/audio/reaper/default.nix
@@ -52,7 +52,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Digital audio workstation";
-    homepage = https://www.reaper.fm/;
+    homepage = "https://www.reaper.fm/";
     license = licenses.unfree;
     platforms = [ "x86_64-linux" ];
     maintainers = with maintainers; [ jfrankenau ];
diff --git a/pkgs/applications/audio/renoise/default.nix b/pkgs/applications/audio/renoise/default.nix
index 2fb1943e0e57..1cbd5b3afa28 100644
--- a/pkgs/applications/audio/renoise/default.nix
+++ b/pkgs/applications/audio/renoise/default.nix
@@ -60,7 +60,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "Modern tracker-based DAW";
-    homepage = https://www.renoise.com/;
+    homepage = "https://www.renoise.com/";
     license = licenses.unfree;
     maintainers = [];
     platforms = [ "x86_64-linux" ];
diff --git a/pkgs/applications/audio/rhvoice/default.nix b/pkgs/applications/audio/rhvoice/default.nix
index 59a8b6ec8c49..7a0a8a59a084 100644
--- a/pkgs/applications/audio/rhvoice/default.nix
+++ b/pkgs/applications/audio/rhvoice/default.nix
@@ -33,7 +33,7 @@ in stdenv.mkDerivation {
 
   meta = {
     description = "A free and open source speech synthesizer for Russian language and others";
-    homepage = https://github.com/Olga-Yakovleva/RHVoice/wiki;
+    homepage = "https://github.com/Olga-Yakovleva/RHVoice/wiki";
     license = lib.licenses.gpl3;
     maintainers = with lib.maintainers; [ berce ];
     platforms = with lib.platforms; all;
diff --git a/pkgs/applications/audio/rhythmbox/default.nix b/pkgs/applications/audio/rhythmbox/default.nix
index b6bff79fa03a..79560451e540 100644
--- a/pkgs/applications/audio/rhythmbox/default.nix
+++ b/pkgs/applications/audio/rhythmbox/default.nix
@@ -58,7 +58,7 @@ in stdenv.mkDerivation rec {
   };
 
   meta = with stdenv.lib; {
-    homepage = https://wiki.gnome.org/Apps/Rhythmbox;
+    homepage = "https://wiki.gnome.org/Apps/Rhythmbox";
     description = "A music playing application for GNOME";
     license = licenses.gpl2;
     platforms = platforms.linux;
diff --git a/pkgs/applications/audio/rkrlv2/default.nix b/pkgs/applications/audio/rkrlv2/default.nix
index 0ff23102e755..59979c410838 100644
--- a/pkgs/applications/audio/rkrlv2/default.nix
+++ b/pkgs/applications/audio/rkrlv2/default.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "Rakarrak effects ported to LV2";
-    homepage = https://github.com/ssj71/rkrlv2;
+    homepage = "https://github.com/ssj71/rkrlv2";
     license = stdenv.lib.licenses.gpl3;
     maintainers = [ stdenv.lib.maintainers.joelmo ];
     platforms = stdenv.lib.platforms.linux;
diff --git a/pkgs/applications/audio/rosegarden/default.nix b/pkgs/applications/audio/rosegarden/default.nix
index 3d9342f16caa..921c8fff67a1 100644
--- a/pkgs/applications/audio/rosegarden/default.nix
+++ b/pkgs/applications/audio/rosegarden/default.nix
@@ -36,7 +36,7 @@ stdenv.mkDerivation (rec {
   enableParallelBuilding = true;
 
   meta = with stdenv.lib; {
-    homepage = https://www.rosegardenmusic.com/;
+    homepage = "https://www.rosegardenmusic.com/";
     description = "Music composition and editing environment";
     longDescription = ''
       Rosegarden is a music composition and editing environment based around
diff --git a/pkgs/applications/audio/schismtracker/default.nix b/pkgs/applications/audio/schismtracker/default.nix
index f902b2dd41b0..b50dd78ff1ac 100644
--- a/pkgs/applications/audio/schismtracker/default.nix
+++ b/pkgs/applications/audio/schismtracker/default.nix
@@ -22,7 +22,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "Music tracker application, free reimplementation of Impulse Tracker";
-    homepage = http://schismtracker.org/;
+    homepage = "http://schismtracker.org/";
     license = stdenv.lib.licenses.gpl2;
     platforms = [ "x86_64-linux" "i686-linux" ];
     maintainers = [ stdenv.lib.maintainers.ftrvxmtrx ];
diff --git a/pkgs/applications/audio/seq24/default.nix b/pkgs/applications/audio/seq24/default.nix
index 9bab024f021e..c8347d70b1d9 100644
--- a/pkgs/applications/audio/seq24/default.nix
+++ b/pkgs/applications/audio/seq24/default.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation  rec {
 
   meta = with stdenv.lib; {
     description = "Minimal loop based midi sequencer";
-    homepage = http://www.filter24.org/seq24;
+    homepage = "http://www.filter24.org/seq24";
     license = licenses.gpl2;
     platforms = platforms.linux;
     maintainers = with maintainers; [ goibhniu ];
diff --git a/pkgs/applications/audio/shntool/default.nix b/pkgs/applications/audio/shntool/default.nix
index e3bfc60a40a5..de18f3c2ce8d 100644
--- a/pkgs/applications/audio/shntool/default.nix
+++ b/pkgs/applications/audio/shntool/default.nix
@@ -5,7 +5,7 @@ stdenv.mkDerivation {
   pname = "shntool";
 
   src = fetchurl {
-    url = http://www.etree.org/shnutils/shntool/dist/src/shntool-3.0.10.tar.gz;
+    url = "http://www.etree.org/shnutils/shntool/dist/src/shntool-3.0.10.tar.gz";
     sha256 = "00i1rbjaaws3drkhiczaign3lnbhr161b7rbnjr8z83w8yn2wc3l";
   };
 
@@ -13,7 +13,7 @@ stdenv.mkDerivation {
 
   meta = {
     description = "Multi-purpose WAVE data processing and reporting utility";
-    homepage = http://www.etree.org/shnutils/shntool/;
+    homepage = "http://www.etree.org/shnutils/shntool/";
     license = stdenv.lib.licenses.gpl2Plus;
     platforms = stdenv.lib.platforms.all;
     maintainers = with stdenv.lib.maintainers; [ jcumming ];
diff --git a/pkgs/applications/audio/sidplayfp/default.nix b/pkgs/applications/audio/sidplayfp/default.nix
index aff8c173d9f2..b0a50bbf128e 100644
--- a/pkgs/applications/audio/sidplayfp/default.nix
+++ b/pkgs/applications/audio/sidplayfp/default.nix
@@ -14,7 +14,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "A SID player using libsidplayfp";
-    homepage = https://sourceforge.net/projects/sidplay-residfp/;
+    homepage = "https://sourceforge.net/projects/sidplay-residfp/";
     license = with licenses; [ gpl2Plus ];
     maintainers = with maintainers; [ dezgeg ];
     platforms = with platforms; linux;
diff --git a/pkgs/applications/audio/sisco.lv2/default.nix b/pkgs/applications/audio/sisco.lv2/default.nix
index f95655f5e9a3..07215fc42f87 100644
--- a/pkgs/applications/audio/sisco.lv2/default.nix
+++ b/pkgs/applications/audio/sisco.lv2/default.nix
@@ -36,7 +36,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Simple audio oscilloscope with variable time scale, triggering, cursors and numeric readout in LV2 plugin format";
-    homepage = http://x42.github.io/sisco.lv2/;
+    homepage = "http://x42.github.io/sisco.lv2/";
     license = licenses.gpl2;
     maintainers = [ maintainers.e-user ];
     platforms = platforms.linux;
diff --git a/pkgs/applications/audio/snapcast/default.nix b/pkgs/applications/audio/snapcast/default.nix
index 21a36cecbe54..531a633f05da 100644
--- a/pkgs/applications/audio/snapcast/default.nix
+++ b/pkgs/applications/audio/snapcast/default.nix
@@ -59,7 +59,7 @@ stdenv.mkDerivation rec {
 
   meta = with lib; {
     description = "Synchronous multi-room audio player";
-    homepage = https://github.com/badaix/snapcast;
+    homepage = "https://github.com/badaix/snapcast";
     maintainers = with maintainers; [ fpletz ];
     license = licenses.gpl3;
   };
diff --git a/pkgs/applications/audio/sndpeek/default.nix b/pkgs/applications/audio/sndpeek/default.nix
index 376aadc7385b..d239fda11aee 100644
--- a/pkgs/applications/audio/sndpeek/default.nix
+++ b/pkgs/applications/audio/sndpeek/default.nix
@@ -49,7 +49,7 @@ stdenv.mkDerivation rec {
          * available on MacOS X, Linux, and Windows under GPL
          * part of the sndtools distribution.
     '';
-    homepage = https://soundlab.cs.princeton.edu/software/sndpeek/;
+    homepage = "https://soundlab.cs.princeton.edu/software/sndpeek/";
     license = licenses.gpl2;
     maintainers = [ maintainers.laikq ];
   };
diff --git a/pkgs/applications/audio/sonata/default.nix b/pkgs/applications/audio/sonata/default.nix
index b9293fe27294..68eefadf4110 100644
--- a/pkgs/applications/audio/sonata/default.nix
+++ b/pkgs/applications/audio/sonata/default.nix
@@ -61,7 +61,7 @@ in buildPythonApplication rec {
        - Commandline control
        - Available in 24 languages
     '';
-    homepage = https://www.nongnu.org/sonata/;
+    homepage = "https://www.nongnu.org/sonata/";
     license = stdenv.lib.licenses.gpl3;
     platforms = stdenv.lib.platforms.linux;
     maintainers = [ stdenv.lib.maintainers.rvl ];
diff --git a/pkgs/applications/audio/sonic-lineup/default.nix b/pkgs/applications/audio/sonic-lineup/default.nix
index 93b4c2dade4d..b837eb07cf1b 100644
--- a/pkgs/applications/audio/sonic-lineup/default.nix
+++ b/pkgs/applications/audio/sonic-lineup/default.nix
@@ -30,7 +30,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Comparative visualisation of related audio recordings";
-    homepage = https://www.sonicvisualiser.org/sonic-lineup/;
+    homepage = "https://www.sonicvisualiser.org/sonic-lineup/";
     license = licenses.gpl2Plus;
     maintainers = [ maintainers.vandenoever ];
     platforms = platforms.linux;
diff --git a/pkgs/applications/audio/sonic-visualiser/default.nix b/pkgs/applications/audio/sonic-visualiser/default.nix
index f7803098066d..e8b6a4d4313b 100644
--- a/pkgs/applications/audio/sonic-visualiser/default.nix
+++ b/pkgs/applications/audio/sonic-visualiser/default.nix
@@ -48,7 +48,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "View and analyse contents of music audio files";
-    homepage = https://www.sonicvisualiser.org/;
+    homepage = "https://www.sonicvisualiser.org/";
     license = licenses.gpl2Plus;
     maintainers = [ maintainers.goibhniu maintainers.marcweber ];
     platforms = platforms.linux;
diff --git a/pkgs/applications/audio/sooperlooper/default.nix b/pkgs/applications/audio/sooperlooper/default.nix
index 768b40a11388..3fb111db8517 100644
--- a/pkgs/applications/audio/sooperlooper/default.nix
+++ b/pkgs/applications/audio/sooperlooper/default.nix
@@ -37,7 +37,7 @@ stdenv.mkDerivation rec {
     '';
 
     version = version;
-    homepage = http://essej.net/sooperlooper/index.html;
+    homepage = "http://essej.net/sooperlooper/index.html";
     license = stdenv.lib.licenses.gpl2;
     maintainers = [ stdenv.lib.maintainers.magnetophon ];
     platforms = stdenv.lib.platforms.linux;
diff --git a/pkgs/applications/audio/sorcer/default.nix b/pkgs/applications/audio/sorcer/default.nix
index 5d8ae0928c90..7601f942868f 100644
--- a/pkgs/applications/audio/sorcer/default.nix
+++ b/pkgs/applications/audio/sorcer/default.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = with stdenv.lib; {
-    homepage = http://openavproductions.com/sorcer/;
+    homepage = "http://openavproductions.com/sorcer/";
     description = "A wavetable LV2 plugin synth, targeted at the electronic / dubstep genre";
     license = licenses.gpl3;
     maintainers = [ maintainers.magnetophon ];
diff --git a/pkgs/applications/audio/sound-juicer/default.nix b/pkgs/applications/audio/sound-juicer/default.nix
index 20c8a83676ef..dcad0cec1e81 100644
--- a/pkgs/applications/audio/sound-juicer/default.nix
+++ b/pkgs/applications/audio/sound-juicer/default.nix
@@ -32,7 +32,7 @@ in stdenv.mkDerivation rec{
 
   meta = with stdenv.lib; {
     description = "A Gnome CD Ripper";
-    homepage = https://wiki.gnome.org/Apps/SoundJuicer;
+    homepage = "https://wiki.gnome.org/Apps/SoundJuicer";
     maintainers = [ maintainers.bdimcheff ];
     license = licenses.gpl2;
     platforms = platforms.linux;
diff --git a/pkgs/applications/audio/soundscape-renderer/default.nix b/pkgs/applications/audio/soundscape-renderer/default.nix
index 5b5f01eef5cc..741211bd90d7 100644
--- a/pkgs/applications/audio/soundscape-renderer/default.nix
+++ b/pkgs/applications/audio/soundscape-renderer/default.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation {
   version = "2016-11-03";
 
   src = fetchgit {
-    url = https://github.com/SoundScapeRenderer/ssr;
+    url = "https://github.com/SoundScapeRenderer/ssr";
     rev = "0dd0136dd24e47b63d8a4e05de467f5c7b047ec9";
     sha256 = "095x2spv9bmg6pi71mpajnghbqj58ziflg16f9854awx0qp9d8x7";
   };
@@ -45,7 +45,7 @@ stdenv.mkDerivation {
   '';
 
   meta = {
-    homepage = http://spatialaudio.net/ssr/;
+    homepage = "http://spatialaudio.net/ssr/";
     description = "The SoundScape Renderer (SSR) is a tool for real-time spatial audio reproduction";
     license = stdenv.lib.licenses.gpl3;
     maintainers = [ stdenv.lib.maintainers.fridh ];
diff --git a/pkgs/applications/audio/spectmorph/default.nix b/pkgs/applications/audio/spectmorph/default.nix
index a4f48aa0c21c..d8209dad02de 100644
--- a/pkgs/applications/audio/spectmorph/default.nix
+++ b/pkgs/applications/audio/spectmorph/default.nix
@@ -14,7 +14,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Allows to analyze samples of musical instruments, and to combine them (morphing) to construct hybrid sounds";
-    homepage = http://spectmorph.org;
+    homepage = "http://spectmorph.org";
     license = licenses.gpl3;
     platforms = [ "x86_64-linux" "i686-linux" ];
     maintainers = [ maintainers.magnetophon ];
diff --git a/pkgs/applications/audio/spectrojack/default.nix b/pkgs/applications/audio/spectrojack/default.nix
index 4c1682b1e0b8..35534750d0c6 100644
--- a/pkgs/applications/audio/spectrojack/default.nix
+++ b/pkgs/applications/audio/spectrojack/default.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "A little spectrogram/audiogram/sonogram/whatever for JACK";
-    homepage = http://sed.free.fr/spectrojack;
+    homepage = "http://sed.free.fr/spectrojack";
     license = stdenv.lib.licenses.publicDomain;
     maintainers = with stdenv.lib.maintainers; [ sleexyz ];
     platforms = with stdenv.lib.platforms; linux;
diff --git a/pkgs/applications/audio/speech-denoiser/default.nix b/pkgs/applications/audio/speech-denoiser/default.nix
index 6598d24fb07a..706a6956c5d2 100644
--- a/pkgs/applications/audio/speech-denoiser/default.nix
+++ b/pkgs/applications/audio/speech-denoiser/default.nix
@@ -34,7 +34,7 @@ stdenv.mkDerivation  {
 
   meta = with stdenv.lib; {
     description = "Speech denoise lv2 plugin based on RNNoise library";
-    homepage = https://github.com/lucianodato/speech-denoiser;
+    homepage = "https://github.com/lucianodato/speech-denoiser";
     license = licenses.lgpl3;
     maintainers = [ maintainers.magnetophon ];
     platforms = platforms.linux;
diff --git a/pkgs/applications/audio/spek/default.nix b/pkgs/applications/audio/spek/default.nix
index f4922e388c46..88b22c59ae50 100644
--- a/pkgs/applications/audio/spek/default.nix
+++ b/pkgs/applications/audio/spek/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Analyse your audio files by showing their spectrogram";
-    homepage = http://spek.cc/;
+    homepage = "http://spek.cc/";
     license = licenses.gpl3;
     platforms = platforms.all;
     maintainers = [ maintainers.bjornfor ];
diff --git a/pkgs/applications/audio/split2flac/default.nix b/pkgs/applications/audio/split2flac/default.nix
index 3c9565df9199..efad434e3079 100644
--- a/pkgs/applications/audio/split2flac/default.nix
+++ b/pkgs/applications/audio/split2flac/default.nix
@@ -54,7 +54,7 @@ in stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Split flac/ape/wv/wav + cue sheet into separate tracks";
-    homepage = https://github.com/ftrvxmtrx/split2flac;
+    homepage = "https://github.com/ftrvxmtrx/split2flac";
     license = licenses.mit;
     platforms = platforms.all;
     maintainers = with maintainers; [ jfrankenau ];
diff --git a/pkgs/applications/audio/spotify-tui/default.nix b/pkgs/applications/audio/spotify-tui/default.nix
index 65dfc50fe1b1..5f9cf2720cda 100644
--- a/pkgs/applications/audio/spotify-tui/default.nix
+++ b/pkgs/applications/audio/spotify-tui/default.nix
@@ -20,7 +20,7 @@ rustPlatform.buildRustPackage rec {
 
   meta = with stdenv.lib; {
     description = "Spotify for the terminal written in Rust";
-    homepage = https://github.com/Rigellute/spotify-tui;
+    homepage = "https://github.com/Rigellute/spotify-tui";
     changelog = "https://github.com/Rigellute/spotify-tui/releases/tag/v${version}";
     license = licenses.mit;
     maintainers = with maintainers; [ jwijenbergh ];
diff --git a/pkgs/applications/audio/spotify/default.nix b/pkgs/applications/audio/spotify/default.nix
index eb2055ec7c19..245d96dee018 100644
--- a/pkgs/applications/audio/spotify/default.nix
+++ b/pkgs/applications/audio/spotify/default.nix
@@ -158,7 +158,7 @@ stdenv.mkDerivation {
     '';
 
   meta = with stdenv.lib; {
-    homepage = https://www.spotify.com/;
+    homepage = "https://www.spotify.com/";
     description = "Play music from the Spotify music service";
     license = licenses.unfree;
     maintainers = with maintainers; [ eelco ftrvxmtrx sheenobu mudri timokau ma27 ];
diff --git a/pkgs/applications/audio/spotifywm/default.nix b/pkgs/applications/audio/spotifywm/default.nix
index 2380c8e5d9ed..a51e82f29c4b 100644
--- a/pkgs/applications/audio/spotifywm/default.nix
+++ b/pkgs/applications/audio/spotifywm/default.nix
@@ -22,7 +22,7 @@ stdenv.mkDerivation {
   '';
 
   meta = with stdenv.lib; {
-    homepage = https://github.com/dasJ/spotifywm;
+    homepage = "https://github.com/dasJ/spotifywm";
     description = "Wrapper around Spotify that correctly sets class name before opening the window";
     license = licenses.mit;
     platforms = platforms.linux;
diff --git a/pkgs/applications/audio/squeezelite/default.nix b/pkgs/applications/audio/squeezelite/default.nix
index ce0153e9f26e..de135706ad3f 100644
--- a/pkgs/applications/audio/squeezelite/default.nix
+++ b/pkgs/applications/audio/squeezelite/default.nix
@@ -62,7 +62,7 @@ in stdenv.mkDerivation {
 
   meta = with stdenv.lib; {
     description = "Lightweight headless squeezebox client emulator";
-    homepage = https://github.com/ralph-irving/squeezelite;
+    homepage = "https://github.com/ralph-irving/squeezelite";
     license = with licenses; [ gpl3 ] ++ optional dsdSupport bsd2;
     maintainers = with maintainers; [ samdoshi ];
     platforms = platforms.linux;
diff --git a/pkgs/applications/audio/squishyball/default.nix b/pkgs/applications/audio/squishyball/default.nix
index 496ce779ffb5..e6dd48018e74 100644
--- a/pkgs/applications/audio/squishyball/default.nix
+++ b/pkgs/applications/audio/squishyball/default.nix
@@ -42,7 +42,7 @@ stdenv.mkDerivation rec {
        comparisons of groups of up to ten samples; this is the default
        mode of operation.
     '';
-    homepage = https://svn.xiph.org/trunk/squishyball;
+    homepage = "https://svn.xiph.org/trunk/squishyball";
     license = licenses.gpl2Plus;
     maintainers = with maintainers; [ michalrus ];
     platforms = platforms.linux;
diff --git a/pkgs/applications/audio/ssrc/default.nix b/pkgs/applications/audio/ssrc/default.nix
index 1247bbc19f97..9d519e14147b 100644
--- a/pkgs/applications/audio/ssrc/default.nix
+++ b/pkgs/applications/audio/ssrc/default.nix
@@ -33,7 +33,7 @@ stdenv.mkDerivation rec {
     '';
 
     version = version;
-    homepage = http://shibatch.sourceforge.net/;
+    homepage = "http://shibatch.sourceforge.net/";
     license = licenses.gpl2;
     maintainers = with maintainers; [ leenaars];
     platforms = with platforms; [ linux ] ;
diff --git a/pkgs/applications/audio/stone-phaser/default.nix b/pkgs/applications/audio/stone-phaser/default.nix
index 6e64ebc7fb3e..d36b28df978a 100644
--- a/pkgs/applications/audio/stone-phaser/default.nix
+++ b/pkgs/applications/audio/stone-phaser/default.nix
@@ -25,7 +25,7 @@ stdenv.mkDerivation rec {
   installFlags = [ "PREFIX=$(out)" ];
 
   meta = with stdenv.lib; {
-    homepage = https://github.com/jpcima/stone-phaser;
+    homepage = "https://github.com/jpcima/stone-phaser";
     description = "A classic analog phaser effect, made with DPF and Faust";
     maintainers = [ maintainers.magnetophon ];
     platforms = platforms.linux;
diff --git a/pkgs/applications/audio/streamripper/default.nix b/pkgs/applications/audio/streamripper/default.nix
index efa87a2f72cc..55ed40c2fb8d 100644
--- a/pkgs/applications/audio/streamripper/default.nix
+++ b/pkgs/applications/audio/streamripper/default.nix
@@ -13,7 +13,7 @@ stdenv.mkDerivation rec {
   buildInputs = [ glib libogg libvorbis libmad ];
 
   meta = with stdenv.lib; {
-    homepage = http://streamripper.sourceforge.net/;
+    homepage = "http://streamripper.sourceforge.net/";
     description = "Application that lets you record streaming mp3 to your hard drive";
     license = licenses.gpl2;
     maintainers = with maintainers; [ the-kenny ];
diff --git a/pkgs/applications/audio/svox/default.nix b/pkgs/applications/audio/svox/default.nix
index 3e9fe4725afd..0f8e51438830 100644
--- a/pkgs/applications/audio/svox/default.nix
+++ b/pkgs/applications/audio/svox/default.nix
@@ -35,7 +35,7 @@ stdenv.mkDerivation {
 
   meta = with stdenv.lib; {
     description = "Text-to-speech engine";
-    homepage = https://android.googlesource.com/platform/external/svox;
+    homepage = "https://android.googlesource.com/platform/external/svox";
     platforms = platforms.linux;
     license = licenses.asl20;
     maintainers = with maintainers; [ abbradar ];
diff --git a/pkgs/applications/audio/swh-lv2/default.nix b/pkgs/applications/audio/swh-lv2/default.nix
index b59752d7cc3e..02499d54476f 100644
--- a/pkgs/applications/audio/swh-lv2/default.nix
+++ b/pkgs/applications/audio/swh-lv2/default.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
   installPhase = "make install-system";
 
   meta = with stdenv.lib; {
-    homepage = http://plugin.org.uk;
+    homepage = "http://plugin.org.uk";
     description = "LV2 version of Steve Harris' SWH plugins";
     longDescription = ''
       SWH plugins include:
diff --git a/pkgs/applications/audio/tambura/default.nix b/pkgs/applications/audio/tambura/default.nix
index 030bb2c01a72..96f9bb7053e0 100644
--- a/pkgs/applications/audio/tambura/default.nix
+++ b/pkgs/applications/audio/tambura/default.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "A FAUST patch inspired by the Indian Tambura/Tanpura - a four string drone instrument, known for its unique rich harmonic timbre";
-    homepage = https://github.com/olilarkin/Tambura;
+    homepage = "https://github.com/olilarkin/Tambura";
     license = licenses.gpl2;
     maintainers = [ maintainers.magnetophon ];
   };
diff --git a/pkgs/applications/audio/tetraproc/default.nix b/pkgs/applications/audio/tetraproc/default.nix
index 40362fdd4968..8780e54bb7c3 100644
--- a/pkgs/applications/audio/tetraproc/default.nix
+++ b/pkgs/applications/audio/tetraproc/default.nix
@@ -35,7 +35,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Converts the A-format signals from a tetrahedral Ambisonic microphone into B-format signals ready for recording";
-    homepage = http://kokkinizita.linuxaudio.org/linuxaudio/;
+    homepage = "http://kokkinizita.linuxaudio.org/linuxaudio/";
     license = licenses.gpl2;
     maintainers = with maintainers; [ magnetophon ];
     platforms = platforms.linux;
diff --git a/pkgs/applications/audio/timemachine/default.nix b/pkgs/applications/audio/timemachine/default.nix
index 3564f875c9b4..8be43346bc04 100644
--- a/pkgs/applications/audio/timemachine/default.nix
+++ b/pkgs/applications/audio/timemachine/default.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "JACK audio recorder";
-    homepage = http://plugin.org.uk/timemachine/;
+    homepage = "http://plugin.org.uk/timemachine/";
     license = stdenv.lib.licenses.lgpl2;
     platforms = stdenv.lib.platforms.linux;
     maintainers = [ stdenv.lib.maintainers.nico202 ];
diff --git a/pkgs/applications/audio/tony/default.nix b/pkgs/applications/audio/tony/default.nix
index 92cab9b5b8de..011d80253647 100644
--- a/pkgs/applications/audio/tony/default.nix
+++ b/pkgs/applications/audio/tony/default.nix
@@ -29,7 +29,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Pitch and note annotation of unaccompanied melody";
-    homepage = https://www.sonicvisualiser.org/tony/;
+    homepage = "https://www.sonicvisualiser.org/tony/";
     license = licenses.gpl2Plus;
     maintainers = with maintainers; [ orivej ];
     platforms = platforms.linux;
diff --git a/pkgs/applications/audio/transcode/default.nix b/pkgs/applications/audio/transcode/default.nix
index d7d5b65375e9..c7ee3914f25c 100644
--- a/pkgs/applications/audio/transcode/default.nix
+++ b/pkgs/applications/audio/transcode/default.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Suite of command line utilities for transcoding video and audio codecs, and for converting between different container formats";
-    homepage = http://www.transcoding.org/;
+    homepage = "http://www.transcoding.org/";
     license = licenses.lgpl2Plus;
     platforms = platforms.linux;
   };
diff --git a/pkgs/applications/audio/transcribe/default.nix b/pkgs/applications/audio/transcribe/default.nix
index 8eb846ac9c56..d9469fa4b7ae 100644
--- a/pkgs/applications/audio/transcribe/default.nix
+++ b/pkgs/applications/audio/transcribe/default.nix
@@ -64,7 +64,7 @@ stdenv.mkDerivation rec {
       has many transcription-specific features not found on
       conventional music players.
     '';
-    homepage = https://www.seventhstring.com/xscribe/;
+    homepage = "https://www.seventhstring.com/xscribe/";
     license = licenses.unfree;
     platforms = platforms.linux;
     maintainers = with maintainers; [ michalrus ];
diff --git a/pkgs/applications/audio/tree-from-tags/default.nix b/pkgs/applications/audio/tree-from-tags/default.nix
index 521133cb08fc..3b25b4218f19 100644
--- a/pkgs/applications/audio/tree-from-tags/default.nix
+++ b/pkgs/applications/audio/tree-from-tags/default.nix
@@ -30,7 +30,7 @@ EOF
 
   meta = with stdenv.lib; {
     description = "Create file hierarchies from media tags";
-    homepage = https://www.emacswiki.org/emacs/Bongo;
+    homepage = "https://www.emacswiki.org/emacs/Bongo";
     platforms = ruby.meta.platforms;
     maintainers = [ maintainers.livnev maintainers.dbrock ];
     license = licenses.gpl2Plus;
diff --git a/pkgs/applications/audio/uade123/default.nix b/pkgs/applications/audio/uade123/default.nix
index 844eea11f514..9130461e4d72 100644
--- a/pkgs/applications/audio/uade123/default.nix
+++ b/pkgs/applications/audio/uade123/default.nix
@@ -17,7 +17,7 @@ in stdenv.mkDerivation {
 
   meta = with stdenv.lib; {
     description = "Plays old Amiga tunes through UAE emulation and cloned m68k-assembler Eagleplayer API";
-    homepage = http://zakalwe.fi/uade/;
+    homepage = "http://zakalwe.fi/uade/";
     license = licenses.gpl2;
     maintainers = [ stdenv.lib.maintainers.gnidorah ];
     platforms = stdenv.lib.platforms.unix;
diff --git a/pkgs/applications/audio/vcv-rack/default.nix b/pkgs/applications/audio/vcv-rack/default.nix
index 21aa27fa5bc1..2aa09ec0be81 100644
--- a/pkgs/applications/audio/vcv-rack/default.nix
+++ b/pkgs/applications/audio/vcv-rack/default.nix
@@ -93,7 +93,7 @@ with stdenv.lib; stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Open-source virtual modular synthesizer";
-    homepage = https://vcvrack.com/;
+    homepage = "https://vcvrack.com/";
     # The source is BSD-3 licensed, some of the art is CC-BY-NC 4.0 or under a
     # no-derivatives clause
     license = with licenses; [ bsd3 cc-by-nc-40 unfreeRedistributable ];
diff --git a/pkgs/applications/audio/vimpc/default.nix b/pkgs/applications/audio/vimpc/default.nix
index 7f02ea9cefec..bcbfa6d3874f 100644
--- a/pkgs/applications/audio/vimpc/default.nix
+++ b/pkgs/applications/audio/vimpc/default.nix
@@ -22,7 +22,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "A vi/vim inspired client for the Music Player Daemon (mpd)";
-    homepage = https://github.com/boysetsfrog/vimpc;
+    homepage = "https://github.com/boysetsfrog/vimpc";
     license = licenses.gpl3;
     platforms = platforms.linux;
     maintainers = with maintainers; [ pSub ];
diff --git a/pkgs/applications/audio/vkeybd/default.nix b/pkgs/applications/audio/vkeybd/default.nix
index 3f77a6574724..0e8f12823d1e 100644
--- a/pkgs/applications/audio/vkeybd/default.nix
+++ b/pkgs/applications/audio/vkeybd/default.nix
@@ -24,7 +24,7 @@ stdenv.mkDerivation  rec {
 
   meta = with stdenv.lib; {
     description = "Virtual MIDI keyboard";
-    homepage = https://www.alsa-project.org/~tiwai/alsa.html;
+    homepage = "https://www.alsa-project.org/~tiwai/alsa.html";
     license = licenses.gpl2Plus;
     platforms = platforms.linux;
     maintainers = [ maintainers.goibhniu ];
diff --git a/pkgs/applications/audio/vocal/default.nix b/pkgs/applications/audio/vocal/default.nix
index 8b94450f8bda..6ef992ffff67 100644
--- a/pkgs/applications/audio/vocal/default.nix
+++ b/pkgs/applications/audio/vocal/default.nix
@@ -72,7 +72,7 @@ stdenv.mkDerivation rec {
     longDescription = ''
       Vocal is a powerful, fast, and intuitive application that helps users find new podcasts, manage their libraries, and enjoy the best that indepedent audio and video publishing has to offer. Vocal features full support for both episode downloading and streaming, native system integration, iTunes store search and top 100 charts (with international results support), iTunes link parsing, OPML importing and exporting, and so much more. Plus, it has great smart features like automatically keeping your library clean from old files, and the ability to set custom skip intervals.
     '';
-    homepage = https://github.com/needle-and-thread/vocal;
+    homepage = "https://github.com/needle-and-thread/vocal";
     license = licenses.gpl3Plus;
     maintainers = with maintainers; [ worldofpeace ];
     platforms = platforms.linux;
diff --git a/pkgs/applications/audio/vorbis-tools/default.nix b/pkgs/applications/audio/vorbis-tools/default.nix
index 44d322069fc2..2270e56e62ac 100644
--- a/pkgs/applications/audio/vorbis-tools/default.nix
+++ b/pkgs/applications/audio/vorbis-tools/default.nix
@@ -10,7 +10,7 @@ in
 stdenv.mkDerivation {
   name = "vorbis-tools-1.4.0";
   src = fetchurl {
-    url = http://downloads.xiph.org/releases/vorbis/vorbis-tools-1.4.0.tar.gz;
+    url = "http://downloads.xiph.org/releases/vorbis/vorbis-tools-1.4.0.tar.gz";
     sha256 = "1g12bnh5ah08v529y72kfdz5lhvy75iaz7f9jskyby23m9dkk2d3";
   };
 
@@ -29,7 +29,7 @@ stdenv.mkDerivation {
       A set of command-line tools to manipulate Ogg Vorbis audio
       files, notably the `ogg123' player and the `oggenc' encoder.
     '';
-    homepage = https://xiph.org/vorbis/;
+    homepage = "https://xiph.org/vorbis/";
     license = licenses.gpl2;
     platforms = platforms.all;
   };
diff --git a/pkgs/applications/audio/waon/default.nix b/pkgs/applications/audio/waon/default.nix
index b27fdbffb7d6..bc05547e641d 100644
--- a/pkgs/applications/audio/waon/default.nix
+++ b/pkgs/applications/audio/waon/default.nix
@@ -22,7 +22,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "A Wave-to-Notes transcriber";
-    homepage = https://kichiki.github.io/WaoN/;
+    homepage = "https://kichiki.github.io/WaoN/";
     license = licenses.gpl2;
     maintainers = [ maintainers.puckipedia ];
     platforms = platforms.all;
diff --git a/pkgs/applications/audio/wavegain/default.nix b/pkgs/applications/audio/wavegain/default.nix
index 5f56fb7297f4..d9b13f532735 100644
--- a/pkgs/applications/audio/wavegain/default.nix
+++ b/pkgs/applications/audio/wavegain/default.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation {
 
   meta = {
     description = "ReplayGain for wave files";
-    homepage = https://github.com/MestreLion/wavegain;
+    homepage = "https://github.com/MestreLion/wavegain";
     license = stdenv.lib.licenses.lgpl21;
     platforms = stdenv.lib.platforms.linux;
     maintainers = [ stdenv.lib.maintainers.robbinch ];
diff --git a/pkgs/applications/audio/whipper/default.nix b/pkgs/applications/audio/whipper/default.nix
index ff278d4d7f23..5cbc9a07b6c7 100644
--- a/pkgs/applications/audio/whipper/default.nix
+++ b/pkgs/applications/audio/whipper/default.nix
@@ -53,7 +53,7 @@ python3.pkgs.buildPythonApplication rec {
   '';
 
   meta = with stdenv.lib; {
-    homepage = https://github.com/whipper-team/whipper;
+    homepage = "https://github.com/whipper-team/whipper";
     description = "A CD ripper aiming for accuracy over speed";
     maintainers = with maintainers; [ rycee emily ];
     license = licenses.gpl3Plus;
diff --git a/pkgs/applications/audio/wolf-shaper/default.nix b/pkgs/applications/audio/wolf-shaper/default.nix
index 13bf1d674c7c..7d42a3c4e7bf 100644
--- a/pkgs/applications/audio/wolf-shaper/default.nix
+++ b/pkgs/applications/audio/wolf-shaper/default.nix
@@ -38,7 +38,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = with stdenv.lib; {
-    homepage = https://pdesaulniers.github.io/wolf-shaper/;
+    homepage = "https://pdesaulniers.github.io/wolf-shaper/";
     description = "Waveshaper plugin with spline-based graph editor";
     license = licenses.gpl3;
     maintainers = [ maintainers.magnetophon ];
diff --git a/pkgs/applications/audio/x42-avldrums/default.nix b/pkgs/applications/audio/x42-avldrums/default.nix
index b34062672f9a..fb05a50b4e59 100644
--- a/pkgs/applications/audio/x42-avldrums/default.nix
+++ b/pkgs/applications/audio/x42-avldrums/default.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Drum sample player LV2 plugin dedicated to Glen MacArthur's AVLdrums";
-    homepage = https://x42-plugins.com/x42/x42-avldrums;
+    homepage = "https://x42-plugins.com/x42/x42-avldrums";
     maintainers = with maintainers; [ magnetophon orivej ];
     license = licenses.gpl2Plus;
     platforms = platforms.linux;
diff --git a/pkgs/applications/audio/x42-gmsynth/default.nix b/pkgs/applications/audio/x42-gmsynth/default.nix
index 33d61eeb35f6..7a96e3fd4f2f 100644
--- a/pkgs/applications/audio/x42-gmsynth/default.nix
+++ b/pkgs/applications/audio/x42-gmsynth/default.nix
@@ -22,7 +22,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Chris Colins' General User soundfont player LV2 plugin";
-    homepage = https://x42-plugins.com/x42/x42-gmsynth;
+    homepage = "https://x42-plugins.com/x42/x42-gmsynth";
     maintainers = with maintainers; [ orivej ];
     license = licenses.gpl2Plus;
     platforms = platforms.linux;
diff --git a/pkgs/applications/audio/x42-plugins/default.nix b/pkgs/applications/audio/x42-plugins/default.nix
index f4087506daa3..8ec53b0c66ad 100644
--- a/pkgs/applications/audio/x42-plugins/default.nix
+++ b/pkgs/applications/audio/x42-plugins/default.nix
@@ -33,7 +33,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib;
     { description = "Collection of LV2 plugins by Robin Gareus";
-      homepage = https://github.com/x42/x42-plugins;
+      homepage = "https://github.com/x42/x42-plugins";
       maintainers = with maintainers; [ magnetophon ];
       license = licenses.gpl2;
       platforms = [ "i686-linux" "x86_64-linux" ];
diff --git a/pkgs/applications/audio/yasr/default.nix b/pkgs/applications/audio/yasr/default.nix
index c8902f1dda4b..68423197f3c8 100644
--- a/pkgs/applications/audio/yasr/default.nix
+++ b/pkgs/applications/audio/yasr/default.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
   ]; # taken from the debian yasr package
 
   meta = {
-    homepage = http://yasr.sourceforge.net;
+    homepage = "http://yasr.sourceforge.net";
     description = "A general-purpose console screen reader";
     longDescription = "Yasr is a general-purpose console screen reader for GNU/Linux and other Unix-like operating systems.";
     platforms = stdenv.lib.platforms.linux;
diff --git a/pkgs/applications/audio/ympd/default.nix b/pkgs/applications/audio/ympd/default.nix
index 7976f7477171..8f86d6e7ba93 100644
--- a/pkgs/applications/audio/ympd/default.nix
+++ b/pkgs/applications/audio/ympd/default.nix
@@ -15,7 +15,7 @@ stdenv.mkDerivation rec {
   buildInputs = [ cmake mpd_clientlib openssl ];
 
   meta = {
-    homepage = https://www.ympd.org;
+    homepage = "https://www.ympd.org";
     description = "Standalone MPD Web GUI written in C, utilizing Websockets and Bootstrap/JS";
     maintainers = [ stdenv.lib.maintainers.siddharthist ];
     platforms = stdenv.lib.platforms.unix;
diff --git a/pkgs/applications/audio/yoshimi/default.nix b/pkgs/applications/audio/yoshimi/default.nix
index 40691be1a0c9..f8ea58fef3ce 100644
--- a/pkgs/applications/audio/yoshimi/default.nix
+++ b/pkgs/applications/audio/yoshimi/default.nix
@@ -36,7 +36,7 @@ stdenv.mkDerivation  rec {
       ZynAddSubFX along with very good Jack and Alsa midi/audio
       functionality on Linux
     '';
-    homepage = http://yoshimi.sourceforge.net;
+    homepage = "http://yoshimi.sourceforge.net";
     license = licenses.gpl2;
     platforms = platforms.linux;
     maintainers = [ maintainers.goibhniu ];
diff --git a/pkgs/applications/audio/zam-plugins/default.nix b/pkgs/applications/audio/zam-plugins/default.nix
index b9645fa4d8af..a34773513d93 100644
--- a/pkgs/applications/audio/zam-plugins/default.nix
+++ b/pkgs/applications/audio/zam-plugins/default.nix
@@ -25,7 +25,7 @@ stdenv.mkDerivation {
   enableParallelBuilding = true;
 
   meta = with stdenv.lib; {
-    homepage = http://www.zamaudio.com/?p=976;
+    homepage = "http://www.zamaudio.com/?p=976";
     description = "A collection of LV2/LADSPA/VST/JACK audio plugins by ZamAudio";
     license = licenses.gpl2Plus;
     maintainers = [ maintainers.magnetophon ];
diff --git a/pkgs/applications/audio/zita-ajbridge/default.nix b/pkgs/applications/audio/zita-ajbridge/default.nix
index 6904952afea6..6247d1d282a0 100644
--- a/pkgs/applications/audio/zita-ajbridge/default.nix
+++ b/pkgs/applications/audio/zita-ajbridge/default.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Connect additional ALSA devices to JACK";
-    homepage = http://kokkinizita.linuxaudio.org/linuxaudio/index.html;
+    homepage = "http://kokkinizita.linuxaudio.org/linuxaudio/index.html";
     license = licenses.gpl3Plus;
     maintainers = with maintainers; [ orivej ];
     platforms = platforms.linux;
diff --git a/pkgs/applications/audio/zita-at1/default.nix b/pkgs/applications/audio/zita-at1/default.nix
index c91edf34c826..d357febd882e 100644
--- a/pkgs/applications/audio/zita-at1/default.nix
+++ b/pkgs/applications/audio/zita-at1/default.nix
@@ -28,7 +28,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Autotuner Jack application to correct the pitch of vocal tracks";
-    homepage = https://kokkinizita.linuxaudio.org/linuxaudio/index.html;
+    homepage = "https://kokkinizita.linuxaudio.org/linuxaudio/index.html";
     license = licenses.gpl3Plus;
     maintainers = with maintainers; [ orivej ];
     platforms = platforms.linux;
diff --git a/pkgs/applications/audio/zita-njbridge/default.nix b/pkgs/applications/audio/zita-njbridge/default.nix
index 1ec6946cf38c..3a293cfc026f 100644
--- a/pkgs/applications/audio/zita-njbridge/default.nix
+++ b/pkgs/applications/audio/zita-njbridge/default.nix
@@ -24,7 +24,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "command line Jack clients to transmit full quality multichannel audio over a local IP network";
-    homepage = http://kokkinizita.linuxaudio.org/linuxaudio/index.html;
+    homepage = "http://kokkinizita.linuxaudio.org/linuxaudio/index.html";
     license = licenses.gpl3;
     maintainers = [ maintainers.magnetophon ];
     platforms = platforms.linux;
diff --git a/pkgs/applications/audio/zynaddsubfx/default.nix b/pkgs/applications/audio/zynaddsubfx/default.nix
index e22bf9ed653a..9a432f73d3f0 100644
--- a/pkgs/applications/audio/zynaddsubfx/default.nix
+++ b/pkgs/applications/audio/zynaddsubfx/default.nix
@@ -22,7 +22,7 @@ stdenv.mkDerivation  rec {
 
   meta = with stdenv.lib; {
     description = "High quality software synthesizer";
-    homepage = http://zynaddsubfx.sourceforge.net;
+    homepage = "http://zynaddsubfx.sourceforge.net";
     license = licenses.gpl2;
     platforms = platforms.linux;
     maintainers = [ maintainers.goibhniu maintainers.nico202 ];