diff --git a/pkgs/applications/audio/audacious/default.nix b/pkgs/applications/audio/audacious/default.nix
index 6d4b18e29b00..8242d035e5b8 100644
--- a/pkgs/applications/audio/audacious/default.nix
+++ b/pkgs/applications/audio/audacious/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl, pkgconfig, wrapGAppsHook, gettext, glib, gtk3
-, libmowgli, libmcs, dbus_glib, libxml2, xorg, gnome3, alsaLib
+, libmowgli, dbus_glib, libxml2, xorg, gnome3, alsaLib
 , libpulseaudio, libjack2, fluidsynth, libmad, libogg, libvorbis
 , libcdio082, libcddb, flac, ffmpeg, mpg123, libcue, libmms, libbs2b
 , libsndfile, libmodplug, libsamplerate, soxr, lirc, curl, wavpack
@@ -25,7 +25,7 @@ stdenv.mkDerivation rec {
   ];
 
   buildInputs = [
-    gettext glib gtk3 libmowgli libmcs dbus_glib libxml2
+    gettext glib gtk3 libmowgli dbus_glib libxml2
     xorg.libXcomposite gnome3.defaultIconTheme alsaLib libjack2
     libpulseaudio fluidsynth libmad libogg libvorbis libcdio082
     libcddb flac ffmpeg mpg123 libcue libmms libbs2b libsndfile
diff --git a/pkgs/applications/audio/audacious/qt-5.nix b/pkgs/applications/audio/audacious/qt-5.nix
index da143c7d946a..803b0115fbdf 100644
--- a/pkgs/applications/audio/audacious/qt-5.nix
+++ b/pkgs/applications/audio/audacious/qt-5.nix
@@ -3,7 +3,7 @@
   gettext, pkgconfig,
   qtbase,
   alsaLib, curl, faad2, ffmpeg, flac, fluidsynth, gdk_pixbuf, lame, libbs2b,
-  libcddb, libcdio082, libcue, libjack2, libmad, libmcs, libmms, libmodplug,
+  libcddb, libcdio082, libcue, libjack2, libmad, libmms, libmodplug,
   libmowgli, libnotify, libogg, libpulseaudio, libsamplerate, libsidplayfp,
   libsndfile, libvorbis, libxml2, lirc, mpg123, neon, qtmultimedia, soxr,
   wavpack
@@ -39,7 +39,7 @@ mkDerivation {
 
     # Plugin dependencies
     alsaLib curl faad2 ffmpeg flac fluidsynth gdk_pixbuf lame libbs2b libcddb
-    libcdio082 libcue libjack2 libmad libmcs libmms libmodplug libmowgli
+    libcdio082 libcue libjack2 libmad libmms libmodplug libmowgli
     libnotify libogg libpulseaudio libsamplerate libsidplayfp libsndfile
     libvorbis libxml2 lirc mpg123 neon qtmultimedia soxr wavpack
   ];
diff --git a/pkgs/development/libraries/libmcs/default.nix b/pkgs/development/libraries/libmcs/default.nix
deleted file mode 100644
index a457adfed80f..000000000000
--- a/pkgs/development/libraries/libmcs/default.nix
+++ /dev/null
@@ -1,19 +0,0 @@
-{ stdenv, fetchurl, pkgconfig, libmowgli }:
-
-stdenv.mkDerivation rec {
-  name = "libmcs-0.7.2";
-  
-  src = fetchurl {
-    url = "http://distfiles.atheme.org/${name}.tbz2";
-    sha256 = "1knmgxrg2kxdlin8qyf6351943ldg8myllwf860af58x1wncxc74";
-  };
-
-  nativeBuildInputs = [ pkgconfig ];
-  buildInputs = [ libmowgli ];
-  
-  meta = {
-    description = "A library and set of userland tools which abstract the storage of configuration settings away from userland applications";
-    homepage = http://www.atheme.org/projects/mcs.shtml;
-    platforms = stdenv.lib.platforms.unix;
-  };
-}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index fa4488b93173..8fd266caa5fa 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -9384,8 +9384,6 @@ with pkgs;
 
   libmatroska = callPackage ../development/libraries/libmatroska { };
 
-  libmcs = callPackage ../development/libraries/libmcs { };
-
   libmd = callPackage ../development/libraries/libmd { };
 
   libmemcached = callPackage ../development/libraries/libmemcached { };