diff --git a/pkgs/applications/audio/banshee/default.nix b/pkgs/applications/audio/banshee/default.nix
index 1907d621e49f..d1c0c2afa83b 100644
--- a/pkgs/applications/audio/banshee/default.nix
+++ b/pkgs/applications/audio/banshee/default.nix
@@ -1,4 +1,4 @@
-{ pkgs, stdenv, lib, fetchurl, intltool, pkgconfig, gstreamer, gst_plugins_base
+{ pkgs, stdenv, lib, fetchurl, intltool, pkgconfig, gstreamer, gst-plugins-base
 , gst-plugins-good, gst-plugins-bad, gst-plugins-ugly, gst-ffmpeg, glib
 , mono, mono-addins, dbus-sharp-1_0, dbus-sharp-glib-1_0, notify-sharp, gtk-sharp-2_0
 , boo, gdata-sharp, taglib-sharp, sqlite, gnome-sharp, gconf, gtk-sharp-beans, gio-sharp
@@ -17,7 +17,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ pkgconfig intltool ];
   buildInputs = [
-    gtk-sharp-2_0.gtk gstreamer gst_plugins_base gst-plugins-good
+    gtk-sharp-2_0.gtk gstreamer gst-plugins-base gst-plugins-good
     gst-plugins-bad gst-plugins-ugly gst-ffmpeg
     mono dbus-sharp-1_0 dbus-sharp-glib-1_0 mono-addins notify-sharp
     gtk-sharp-2_0 boo gdata-sharp taglib-sharp sqlite gnome-sharp gconf gtk-sharp-beans
diff --git a/pkgs/applications/audio/clementine/default.nix b/pkgs/applications/audio/clementine/default.nix
index cf58dffef02c..01c8ecaced0d 100644
--- a/pkgs/applications/audio/clementine/default.nix
+++ b/pkgs/applications/audio/clementine/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, boost, cmake, gettext, gstreamer, gst_plugins_base
+{ stdenv, fetchurl, boost, cmake, gettext, gstreamer, gst-plugins-base
 , liblastfm, qt4, taglib, fftw, glew, qjson, sqlite, libgpod, libplist
 , usbmuxd, libmtp, gvfs, libcdio, libspotify, protobuf, qca2, pkgconfig
 , sparsehash, config, makeWrapper, runCommand, gst_plugins }:
@@ -27,7 +27,7 @@ let
     fftw
     gettext
     glew
-    gst_plugins_base
+    gst-plugins-base
     gstreamer
     gvfs
     libcdio
diff --git a/pkgs/applications/audio/morituri/default.nix b/pkgs/applications/audio/morituri/default.nix
index 053c295be52f..d4c67bb5622c 100644
--- a/pkgs/applications/audio/morituri/default.nix
+++ b/pkgs/applications/audio/morituri/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchgit, pythonPackages, cdparanoia, cdrdao
-, gst-python, gst_plugins_base, gst-plugins-good
+, gst-python, gst-plugins-base, gst-plugins-good
 , utillinux, makeWrapper, substituteAll, autoreconfHook }:
 
 let
@@ -25,7 +25,7 @@ in stdenv.mkDerivation rec {
   nativeBuildInputs = [ autoreconfHook ];
   buildInputs = [
     python cdparanoia cdrdao utillinux makeWrapper
-    gst_plugins_base gst-plugins-good
+    gst-plugins-base gst-plugins-good
   ] ++ pythonPath;
 
   patches = [
diff --git a/pkgs/applications/audio/quodlibet/default.nix b/pkgs/applications/audio/quodlibet/default.nix
index 2d97ba1d7639..fa582d852157 100644
--- a/pkgs/applications/audio/quodlibet/default.nix
+++ b/pkgs/applications/audio/quodlibet/default.nix
@@ -1,8 +1,8 @@
 { stdenv, fetchurl, python2Packages, intltool
-, gst-python, withGstPlugins ? false, gst_plugins_base ? null
+, gst-python, withGstPlugins ? false, gst-plugins-base ? null
 , gst-plugins-good ? null, gst-plugins-ugly ? null, gst-plugins-bad ? null }:
 
-assert withGstPlugins -> gst_plugins_base != null
+assert withGstPlugins -> gst-plugins-base != null
                          || gst-plugins-good != null
                          || gst-plugins-ugly != null
                          || gst-plugins-bad != null;
@@ -44,7 +44,7 @@ in buildPythonApplication {
   patches = [ ./quodlibet-package-plugins.patch ];
 
   buildInputs = stdenv.lib.optionals withGstPlugins [
-    gst_plugins_base gst-plugins-good gst-plugins-ugly gst-plugins-bad
+    gst-plugins-base gst-plugins-good gst-plugins-ugly gst-plugins-bad
   ];
 
   propagatedBuildInputs = [
diff --git a/pkgs/applications/audio/transcribe/default.nix b/pkgs/applications/audio/transcribe/default.nix
index 3eca141ee62f..5ec5087b9f26 100644
--- a/pkgs/applications/audio/transcribe/default.nix
+++ b/pkgs/applications/audio/transcribe/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchzip, lib, makeWrapper, alsaLib, atk, cairo, gdk_pixbuf
-, glib, gst-ffmpeg, gst-plugins-bad, gst_plugins_base
+, glib, gst-ffmpeg, gst-plugins-bad, gst-plugins-base
 , gst-plugins-good, gst-plugins-ugly, gstreamer, gtk2, libSM, libX11
 , libpng12, pango, zlib }:
 
@@ -21,14 +21,14 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ makeWrapper ];
 
-  buildInputs = [ gst_plugins_base gst-plugins-good
+  buildInputs = [ gst-plugins-base gst-plugins-good
     gst-plugins-bad gst-plugins-ugly gst-ffmpeg ];
 
   dontPatchELF = true;
 
   libPath = lib.makeLibraryPath [
     stdenv.cc.cc glib gtk2 atk pango cairo gdk_pixbuf alsaLib
-    libX11 libSM libpng12 gstreamer gst_plugins_base zlib
+    libX11 libSM libpng12 gstreamer gst-plugins-base zlib
   ];
 
   installPhase = ''
diff --git a/pkgs/applications/networking/browsers/firefox-bin/default.nix b/pkgs/applications/networking/browsers/firefox-bin/default.nix
index 80197999f5a3..01cd7a1df380 100644
--- a/pkgs/applications/networking/browsers/firefox-bin/default.nix
+++ b/pkgs/applications/networking/browsers/firefox-bin/default.nix
@@ -12,7 +12,7 @@
 , gdk_pixbuf
 , glib
 , glibc
-, gst_plugins_base
+, gst-plugins-base
 , gstreamer
 , gtk2
 , gtk3
@@ -94,7 +94,7 @@ stdenv.mkDerivation {
       gdk_pixbuf
       glib
       glibc
-      gst_plugins_base
+      gst-plugins-base
       gstreamer
       gtk2
       gtk3
diff --git a/pkgs/applications/networking/browsers/firefox/default.nix b/pkgs/applications/networking/browsers/firefox/default.nix
index a01cde4d6de6..f2da6257efd1 100644
--- a/pkgs/applications/networking/browsers/firefox/default.nix
+++ b/pkgs/applications/networking/browsers/firefox/default.nix
@@ -3,7 +3,7 @@
 , freetype, fontconfig, file, alsaLib, nspr, nss, libnotify
 , yasm, mesa, sqlite, unzip, makeWrapper
 , hunspell, libevent, libstartup_notification, libvpx
-, cairo, gstreamer, gst_plugins_base, icu, libpng, jemalloc, libpulseaudio
+, cairo, gstreamer, gst-plugins-base, icu, libpng, jemalloc, libpulseaudio
 , autoconf213, which
 , writeScript, xidel, common-updater-scripts, coreutils, gnused, gnugrep, curl
 , enableGTK3 ? false
@@ -42,7 +42,7 @@ common = { pname, version, sha512, updateScript }: stdenv.mkDerivation rec {
       libpulseaudio # only headers are needed
     ]
     ++ lib.optional enableGTK3 gtk3
-    ++ lib.optionals (!passthru.ffmpegSupport) [ gstreamer gst_plugins_base ];
+    ++ lib.optionals (!passthru.ffmpegSupport) [ gstreamer gst-plugins-base ];
 
   nativeBuildInputs = [ autoconf213 which gnused ];
 
diff --git a/pkgs/applications/networking/browsers/palemoon/default.nix b/pkgs/applications/networking/browsers/palemoon/default.nix
index de21c37bc79e..73a828413600 100644
--- a/pkgs/applications/networking/browsers/palemoon/default.nix
+++ b/pkgs/applications/networking/browsers/palemoon/default.nix
@@ -1,7 +1,7 @@
 { stdenv, fetchFromGitHub, makeDesktopItem
 , pkgconfig, autoconf213, alsaLib, bzip2, cairo
 , dbus, dbus_glib, file, fontconfig, freetype
-, gstreamer, gst_plugins_base, gst_all_1
+, gstreamer, gst-plugins-base, gst_all_1
 , gtk2, hunspell, icu, libevent, libjpeg, libnotify
 , libstartup_notification, libvpx, makeWrapper, mesa 
 , nspr, nss, pango, perl, python, libpulseaudio, sqlite 
@@ -39,7 +39,7 @@ stdenv.mkDerivation rec {
 
   buildInputs = [
     alsaLib bzip2 cairo dbus dbus_glib file fontconfig freetype
-    gst_plugins_base gstreamer gst_all_1.gst-plugins-base gtk2
+    gst-plugins-base gstreamer gst_all_1.gst-plugins-base gtk2
     hunspell icu libevent libjpeg libnotify libstartup_notification
     libvpx makeWrapper mesa nspr nss pango perl pkgconfig python
     libpulseaudio sqlite unzip which yasm zip zlib
diff --git a/pkgs/applications/networking/browsers/vivaldi/default.nix b/pkgs/applications/networking/browsers/vivaldi/default.nix
index 0531a58f0a23..ab010653c644 100644
--- a/pkgs/applications/networking/browsers/vivaldi/default.nix
+++ b/pkgs/applications/networking/browsers/vivaldi/default.nix
@@ -3,7 +3,7 @@
 , alsaLib, dbus_libs, cups, libexif, ffmpeg, systemd
 , freetype, fontconfig, libXft, libXrender, libxcb, expat, libXau, libXdmcp
 , libuuid, xz
-, gstreamer, gst_plugins_base, libxml2
+, gstreamer, gst-plugins-base, libxml2
 , glib, gtk2, pango, gdk_pixbuf, cairo, atk, gnome3
 , nss, nspr
 , patchelf
@@ -41,7 +41,7 @@ in stdenv.mkDerivation rec {
       libXi libXft libXcursor libXfixes libXScrnSaver libXcomposite libXdamage libXtst libXrandr
       atk alsaLib dbus_libs cups gtk2 gdk_pixbuf libexif ffmpeg systemd
       freetype fontconfig libXrender libuuid expat glib nss nspr
-      gstreamer libxml2 gst_plugins_base pango cairo gnome3.gconf
+      gstreamer libxml2 gst-plugins-base pango cairo gnome3.gconf
       patchelf
     ];
 
diff --git a/pkgs/applications/networking/instant-messengers/baresip/default.nix b/pkgs/applications/networking/instant-messengers/baresip/default.nix
index a7ddfd1ae418..2b831cdcaaf8 100644
--- a/pkgs/applications/networking/instant-messengers/baresip/default.nix
+++ b/pkgs/applications/networking/instant-messengers/baresip/default.nix
@@ -1,5 +1,5 @@
 {stdenv, fetchurl, zlib, openssl, libre, librem, pkgconfig
-, cairo, mpg123, gstreamer, gst-ffmpeg, gst_plugins_base, gst-plugins-bad
+, cairo, mpg123, gstreamer, gst-ffmpeg, gst-plugins-base, gst-plugins-bad
 , gst-plugins-good, alsaLib, SDL, libv4l, celt, libsndfile, srtp, ffmpeg
 , gsm, speex, portaudio, spandsp, libuuid, ccache
 }:
@@ -11,7 +11,7 @@ stdenv.mkDerivation rec {
     sha256 = "0dhlgjkqn7jkd1pmdyid41c829clzmi5kczjdwxzh5ygn95lydjc";
   };
   buildInputs = [zlib openssl libre librem pkgconfig
-    cairo mpg123 gstreamer gst-ffmpeg gst_plugins_base gst-plugins-bad gst-plugins-good
+    cairo mpg123 gstreamer gst-ffmpeg gst-plugins-base gst-plugins-bad gst-plugins-good
     alsaLib SDL libv4l celt libsndfile srtp ffmpeg gsm speex portaudio spandsp libuuid
     ccache
     ];
diff --git a/pkgs/applications/networking/instant-messengers/zoom-us/default.nix b/pkgs/applications/networking/instant-messengers/zoom-us/default.nix
index 85dbd5f8d8f7..067b1c7884a7 100644
--- a/pkgs/applications/networking/instant-messengers/zoom-us/default.nix
+++ b/pkgs/applications/networking/instant-messengers/zoom-us/default.nix
@@ -2,7 +2,7 @@
 , fetchurl
 , gcc
 , glib
-, gst_plugins_base
+, gst-plugins-base
 , gstreamer
 , icu
 , libpulseaudio
@@ -39,7 +39,7 @@ stdenv.mkDerivation rec {
       alsaLib
       gcc.cc
       glib
-      gst_plugins_base
+      gst-plugins-base
       gstreamer
       icu
       libpulseaudio
diff --git a/pkgs/applications/networking/mailreaders/thunderbird-bin/default.nix b/pkgs/applications/networking/mailreaders/thunderbird-bin/default.nix
index 2bc65226c5fc..1b9c1ac1622f 100644
--- a/pkgs/applications/networking/mailreaders/thunderbird-bin/default.nix
+++ b/pkgs/applications/networking/mailreaders/thunderbird-bin/default.nix
@@ -13,7 +13,7 @@
 , gdk_pixbuf
 , glib
 , glibc
-, gst_plugins_base
+, gst-plugins-base
 , gstreamer
 , gtk2
 , kerberos
@@ -91,7 +91,7 @@ stdenv.mkDerivation {
       gdk_pixbuf
       glib
       glibc
-      gst_plugins_base
+      gst-plugins-base
       gstreamer
       gtk2
       kerberos
diff --git a/pkgs/applications/networking/mailreaders/thunderbird/default.nix b/pkgs/applications/networking/mailreaders/thunderbird/default.nix
index f71a6dff37c5..d4ddfcfc4a69 100644
--- a/pkgs/applications/networking/mailreaders/thunderbird/default.nix
+++ b/pkgs/applications/networking/mailreaders/thunderbird/default.nix
@@ -3,7 +3,7 @@
 , freetype, fontconfig, file, alsaLib, nspr, nss, libnotify
 , yasm, mesa, sqlite, unzip, makeWrapper
 , hunspell, libevent, libstartup_notification, libvpx
-, cairo, gstreamer, gst_plugins_base, icu
+, cairo, gstreamer, gst-plugins-base, icu
 , writeScript, xidel, common-updater-scripts, coreutils, gnused, gnugrep, curl
 , debugBuild ? false
 , # If you want the resulting program to call itself "Thunderbird"
diff --git a/pkgs/applications/video/miro/default.nix b/pkgs/applications/video/miro/default.nix
index 8a033d7761a9..0efa4aba2767 100644
--- a/pkgs/applications/video/miro/default.nix
+++ b/pkgs/applications/video/miro/default.nix
@@ -2,7 +2,7 @@
 , pythonPackages, pyrex096, ffmpeg, boost, glib, gtk2, webkitgtk2, libsoup
 , taglib, sqlite
 , libtorrentRasterbar, glib_networking, gsettings_desktop_schemas
-, gst-python, gst_plugins_base, gst-plugins-good, gst-ffmpeg
+, gst-python, gst-plugins-base, gst-plugins-good, gst-ffmpeg
 , enableBonjour ? false, avahi ? null
 }:
 
@@ -77,7 +77,7 @@ in buildPythonApplication rec {
   propagatedBuildInputs = with pythonPackages; [
     pygobject2 pygtk pycurl mutagen pycairo dbus-python
     pywebkitgtk] ++ [ libtorrentRasterbar
-    gst-python gst_plugins_base gst-plugins-good gst-ffmpeg
+    gst-python gst-plugins-base gst-plugins-good gst-ffmpeg
   ] ++ optional enableBonjour avahi;
 
   meta = {
diff --git a/pkgs/desktops/gnome-3/3.22/misc/pomodoro/default.nix b/pkgs/desktops/gnome-3/3.22/misc/pomodoro/default.nix
index 8c1ab41de520..3ceabe70ad80 100644
--- a/pkgs/desktops/gnome-3/3.22/misc/pomodoro/default.nix
+++ b/pkgs/desktops/gnome-3/3.22/misc/pomodoro/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchFromGitHub, which, automake113x, intltool, pkgconfig, libtool, makeWrapper,
-  dbus_glib, libcanberra_gtk2, gst_all_1, vala_0_32, gnome3, gtk3, gst_plugins_base,
+  dbus_glib, libcanberra_gtk2, gst_all_1, vala_0_32, gnome3, gtk3, gst-plugins-base,
   glib, gobjectIntrospection, telepathy_glib
 }:
 
diff --git a/pkgs/desktops/xfce/applications/xfce4-mixer.nix b/pkgs/desktops/xfce/applications/xfce4-mixer.nix
index f14a2037184c..05a5fa4a6fcc 100644
--- a/pkgs/desktops/xfce/applications/xfce4-mixer.nix
+++ b/pkgs/desktops/xfce/applications/xfce4-mixer.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl, pkgconfig, intltool, makeWrapper
-, glib, gstreamer, gst_plugins_base, gtk
+, glib, gstreamer, gst-plugins-base, gtk
 , libxfce4util, libxfce4ui, xfce4panel, xfconf, libunique ? null
 , pulseaudioSupport ? false, gst-plugins-good
 }:
@@ -7,7 +7,7 @@
 let
   # The usual Gstreamer plugins package has a zillion dependencies
   # that we don't need for a simple mixer, so build a minimal package.
-  gst_plugins_minimal = gst_plugins_base.override {
+  gst_plugins_minimal = gst-plugins-base.override {
     minimalDeps = true;
   };
   gst_plugins_pulse = gst-plugins-good.override {
diff --git a/pkgs/desktops/xfce/applications/xfce4-volumed.nix b/pkgs/desktops/xfce/applications/xfce4-volumed.nix
index b603229e938d..8e4f952438fe 100644
--- a/pkgs/desktops/xfce/applications/xfce4-volumed.nix
+++ b/pkgs/desktops/xfce/applications/xfce4-volumed.nix
@@ -1,12 +1,12 @@
 { stdenv, fetchurl, pkgconfig, makeWrapper
-, gstreamer, gtk2, gst_plugins_base, libnotify
+, gstreamer, gtk2, gst-plugins-base, libnotify
 , keybinder, xfconf
 }:
 
 let
   # The usual Gstreamer plugins package has a zillion dependencies
   # that we don't need for a simple mixer, so build a minimal package.
-  gst_plugins_minimal = gst_plugins_base.override {
+  gst_plugins_minimal = gst-plugins-base.override {
     minimalDeps = true;
   };
 
diff --git a/pkgs/development/haskell-modules/hackage-packages.nix b/pkgs/development/haskell-modules/hackage-packages.nix
index 6feed8f5c987..d31dc82822cb 100644
--- a/pkgs/development/haskell-modules/hackage-packages.nix
+++ b/pkgs/development/haskell-modules/hackage-packages.nix
@@ -69335,7 +69335,7 @@ self: {
   "gi-gstaudio" = callPackage
     ({ mkDerivation, base, bytestring, Cabal, containers, gi-glib
      , gi-gobject, gi-gst, gi-gstbase, gobjectIntrospection
-     , gst_plugins_base, haskell-gi, haskell-gi-base, text, transformers
+     , gst-plugins-base, haskell-gi, haskell-gi-base, text, transformers
      }:
      mkDerivation {
        pname = "gi-gstaudio";
@@ -69347,18 +69347,18 @@ self: {
          haskell-gi haskell-gi-base text transformers
        ];
        librarySystemDepends = [ gobjectIntrospection ];
-       libraryPkgconfigDepends = [ gst_plugins_base ];
+       libraryPkgconfigDepends = [ gst-plugins-base ];
        doHaddock = false;
        homepage = "https://github.com/haskell-gi/haskell-gi";
        description = "GStreamerAudio bindings";
        license = stdenv.lib.licenses.lgpl21;
        hydraPlatforms = stdenv.lib.platforms.none;
      }) {inherit (pkgs) gobjectIntrospection; 
-         gst_plugins_base = pkgs.gst_all_1.gst-plugins-base;};
+         gst-plugins-base = pkgs.gst_all_1.gst-plugins-base;};
 
   "gi-gstbase" = callPackage
     ({ mkDerivation, base, bytestring, Cabal, containers, gi-glib
-     , gi-gobject, gi-gst, gobjectIntrospection, gst_plugins_base
+     , gi-gobject, gi-gst, gobjectIntrospection, gst-plugins-base
      , haskell-gi, haskell-gi-base, text, transformers
      }:
      mkDerivation {
@@ -69371,19 +69371,19 @@ self: {
          haskell-gi-base text transformers
        ];
        librarySystemDepends = [ gobjectIntrospection ];
-       libraryPkgconfigDepends = [ gst_plugins_base ];
+       libraryPkgconfigDepends = [ gst-plugins-base ];
        doHaddock = false;
        homepage = "https://github.com/haskell-gi/haskell-gi";
        description = "GStreamerBase bindings";
        license = stdenv.lib.licenses.lgpl21;
        hydraPlatforms = stdenv.lib.platforms.none;
      }) {inherit (pkgs) gobjectIntrospection; 
-         gst_plugins_base = pkgs.gst_all_1.gst-plugins-base;};
+         gst-plugins-base = pkgs.gst_all_1.gst-plugins-base;};
 
   "gi-gstvideo" = callPackage
     ({ mkDerivation, base, bytestring, Cabal, containers, gi-glib
      , gi-gobject, gi-gst, gi-gstbase, gobjectIntrospection
-     , gst_plugins_base, haskell-gi, haskell-gi-base, text, transformers
+     , gst-plugins-base, haskell-gi, haskell-gi-base, text, transformers
      }:
      mkDerivation {
        pname = "gi-gstvideo";
@@ -69395,14 +69395,14 @@ self: {
          haskell-gi haskell-gi-base text transformers
        ];
        librarySystemDepends = [ gobjectIntrospection ];
-       libraryPkgconfigDepends = [ gst_plugins_base ];
+       libraryPkgconfigDepends = [ gst-plugins-base ];
        doHaddock = false;
        homepage = "https://github.com/haskell-gi/haskell-gi";
        description = "GStreamerVideo bindings";
        license = stdenv.lib.licenses.lgpl21;
        hydraPlatforms = stdenv.lib.platforms.none;
      }) {inherit (pkgs) gobjectIntrospection; 
-         gst_plugins_base = pkgs.gst_all_1.gst-plugins-base;};
+         gst-plugins-base = pkgs.gst_all_1.gst-plugins-base;};
 
   "gi-gtk" = callPackage
     ({ mkDerivation, base, bytestring, Cabal, containers, gi-atk
@@ -76588,7 +76588,7 @@ self: {
 
   "gstreamer" = callPackage
     ({ mkDerivation, array, base, bytestring, Cabal, directory, glib
-     , gst_plugins_base, gstreamer, gtk2hs-buildtools, mtl
+     , gst-plugins-base, gstreamer, gtk2hs-buildtools, mtl
      }:
      mkDerivation {
        pname = "gstreamer";
@@ -76598,11 +76598,11 @@ self: {
        libraryHaskellDepends = [
          array base bytestring directory glib mtl
        ];
-       libraryPkgconfigDepends = [ gst_plugins_base gstreamer ];
+       libraryPkgconfigDepends = [ gst-plugins-base gstreamer ];
        homepage = "http://projects.haskell.org/gtk2hs/";
        description = "Binding to the GStreamer open source multimedia framework";
        license = stdenv.lib.licenses.lgpl21;
-     }) {inherit (pkgs) gst_plugins_base; inherit (pkgs) gstreamer;};
+     }) {inherit (pkgs) gst-plugins-base; inherit (pkgs) gstreamer;};
 
   "gt-tools" = callPackage
     ({ mkDerivation, base, containers, extensible-exceptions, haskeline
diff --git a/pkgs/development/libraries/farsight2/default.nix b/pkgs/development/libraries/farsight2/default.nix
index da6c799ae8b9..9ff57257e03b 100644
--- a/pkgs/development/libraries/farsight2/default.nix
+++ b/pkgs/development/libraries/farsight2/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, libnice, pkgconfig, python2Packages, gstreamer, gst_plugins_base
+{ stdenv, fetchurl, libnice, pkgconfig, python2Packages, gstreamer, gst-plugins-base
 , gst-python, gupnp_igd }:
 
 let
@@ -15,7 +15,7 @@ in stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ pkgconfig ];
 
-  propagatedBuildInputs = [ gstreamer gst_plugins_base ];
+  propagatedBuildInputs = [ gstreamer gst-plugins-base ];
 
   meta = {
     homepage = http://farsight.freedesktop.org/wiki/;
diff --git a/pkgs/development/libraries/gstreamer/legacy/gnonlin/default.nix b/pkgs/development/libraries/gstreamer/legacy/gnonlin/default.nix
index 2e30782f44bb..0e8dfec65f4b 100644
--- a/pkgs/development/libraries/gstreamer/legacy/gnonlin/default.nix
+++ b/pkgs/development/libraries/gstreamer/legacy/gnonlin/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, pkgconfig, gst_plugins_base, gstreamer }:
+{ stdenv, fetchurl, pkgconfig, gst-plugins-base, gstreamer }:
 
 stdenv.mkDerivation rec {
   name = "gnonlin-0.10.17";
@@ -11,7 +11,7 @@ stdenv.mkDerivation rec {
     sha256 = "0dc9kvr6i7sh91cyhzlbx2bchwg84rfa4679ccppzjf0y65dv8p4";
   };
 
-  buildInputs = [ gst_plugins_base gstreamer pkgconfig ];
+  buildInputs = [ gst-plugins-base gstreamer pkgconfig ];
 
   meta = {
     homepage = "http://gstreamer.freedesktop.org/modules/gnonlin.html";
diff --git a/pkgs/development/libraries/gstreamer/legacy/gst-ffmpeg/default.nix b/pkgs/development/libraries/gstreamer/legacy/gst-ffmpeg/default.nix
index 18d483594efb..484075f73f75 100644
--- a/pkgs/development/libraries/gstreamer/legacy/gst-ffmpeg/default.nix
+++ b/pkgs/development/libraries/gstreamer/legacy/gst-ffmpeg/default.nix
@@ -1,4 +1,4 @@
-{ fetchurl, stdenv, pkgconfig, gst_plugins_base, bzip2, yasm, orc
+{ fetchurl, stdenv, pkgconfig, gst-plugins-base, bzip2, yasm, orc
 , useInternalFfmpeg ? false, ffmpeg ? null }:
 
 stdenv.mkDerivation rec {
@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
   configureFlags = stdenv.lib.optionalString (!useInternalFfmpeg) "--with-system-ffmpeg";
 
   buildInputs =
-    [ pkgconfig bzip2 gst_plugins_base orc ]
+    [ pkgconfig bzip2 gst-plugins-base orc ]
     ++ (if useInternalFfmpeg then [ yasm ] else [ ffmpeg ]);
 
   meta = {
diff --git a/pkgs/development/libraries/gstreamer/legacy/gst-plugins-bad/default.nix b/pkgs/development/libraries/gstreamer/legacy/gst-plugins-bad/default.nix
index 988d1bba258a..fecc77b2a544 100644
--- a/pkgs/development/libraries/gstreamer/legacy/gst-plugins-bad/default.nix
+++ b/pkgs/development/libraries/gstreamer/legacy/gst-plugins-bad/default.nix
@@ -1,4 +1,4 @@
-{ fetchurl, stdenv, pkgconfig, glib, gstreamer, gst_plugins_base
+{ fetchurl, stdenv, pkgconfig, glib, gstreamer, gst-plugins-base
 , libdvdnav, libdvdread, orc }:
 
 stdenv.mkDerivation rec {
@@ -13,7 +13,7 @@ stdenv.mkDerivation rec {
   };
 
   buildInputs =
-    [ pkgconfig glib gstreamer gst_plugins_base libdvdnav libdvdread orc ];
+    [ pkgconfig glib gstreamer gst-plugins-base libdvdnav libdvdread orc ];
 
   enableParallelBuilding = true;
 
diff --git a/pkgs/development/libraries/gstreamer/legacy/gst-plugins-good/default.nix b/pkgs/development/libraries/gstreamer/legacy/gst-plugins-good/default.nix
index af6e3be401b0..9339de3d9ed4 100644
--- a/pkgs/development/libraries/gstreamer/legacy/gst-plugins-good/default.nix
+++ b/pkgs/development/libraries/gstreamer/legacy/gst-plugins-good/default.nix
@@ -1,4 +1,4 @@
-{ fetchurl, stdenv, lib, pkgconfig, gst_plugins_base, aalib, cairo
+{ fetchurl, stdenv, lib, pkgconfig, gst-plugins-base, aalib, cairo
 , flac, libjpeg, zlib, speex, libpng, libdv, libcaca, libvpx
 , libiec61883, libavc1394, taglib, libpulseaudio, gdk_pixbuf, orc
 , glib, gstreamer, bzip2, libsoup, libshout, ncurses, libintlOrEmpty
@@ -23,7 +23,7 @@ stdenv.mkDerivation rec {
   configureFlags = [ "--enable-experimental" "--disable-oss" ];
 
   buildInputs =
-    [ pkgconfig glib gstreamer gst_plugins_base ]
+    [ pkgconfig glib gstreamer gst-plugins-base ]
     ++ lib.optional stdenv.isLinux libpulseaudio
     ++ libintlOrEmpty
     ++ lib.optionals (!minimalDeps)
diff --git a/pkgs/development/libraries/gstreamer/legacy/gst-plugins-ugly/default.nix b/pkgs/development/libraries/gstreamer/legacy/gst-plugins-ugly/default.nix
index 8e4e662dc3b3..9863b3e01285 100644
--- a/pkgs/development/libraries/gstreamer/legacy/gst-plugins-ugly/default.nix
+++ b/pkgs/development/libraries/gstreamer/legacy/gst-plugins-ugly/default.nix
@@ -1,4 +1,4 @@
-{ fetchurl, stdenv, pkgconfig, glib, gstreamer, gst_plugins_base
+{ fetchurl, stdenv, pkgconfig, glib, gstreamer, gst-plugins-base
 , libmad, libdvdread, libmpeg2, libcdio, a52dec, x264, orc, lame, libintlOrEmpty }:
 
 stdenv.mkDerivation rec {
@@ -13,7 +13,7 @@ stdenv.mkDerivation rec {
   };
 
   buildInputs =
-    [ pkgconfig glib gstreamer gst_plugins_base libmad libdvdread a52dec x264 orc lame ] ++ libintlOrEmpty;
+    [ pkgconfig glib gstreamer gst-plugins-base libmad libdvdread a52dec x264 orc lame ] ++ libintlOrEmpty;
 
   NIX_LDFLAGS = if stdenv.isDarwin then "-lintl" else null;
 
diff --git a/pkgs/development/libraries/gstreamer/legacy/gst-python/default.nix b/pkgs/development/libraries/gstreamer/legacy/gst-python/default.nix
index d78b50a7821a..fd01aa5c1dce 100644
--- a/pkgs/development/libraries/gstreamer/legacy/gst-python/default.nix
+++ b/pkgs/development/libraries/gstreamer/legacy/gst-python/default.nix
@@ -1,4 +1,4 @@
-{ fetchurl, stdenv, pkgconfig, python2Packages, gstreamer, gst_plugins_base
+{ fetchurl, stdenv, pkgconfig, python2Packages, gstreamer, gst-plugins-base
 }:
 
 let
@@ -21,7 +21,7 @@ in stdenv.mkDerivation rec {
   patches = [ ./disable-testFake.patch ];
 
   buildInputs =
-    [ pkgconfig gst_plugins_base pygobject2 ]
+    [ pkgconfig gst-plugins-base pygobject2 ]
     ;
 
   propagatedBuildInputs = [ gstreamer python ];
diff --git a/pkgs/development/libraries/gstreamer/legacy/gstreamermm/default.nix b/pkgs/development/libraries/gstreamer/legacy/gstreamermm/default.nix
index ce6ae9318363..f181aa029bd7 100644
--- a/pkgs/development/libraries/gstreamer/legacy/gstreamermm/default.nix
+++ b/pkgs/development/libraries/gstreamer/legacy/gstreamermm/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, glibmm, gstreamer, gst_plugins_base, libsigcxx, libxmlxx, pkgconfig }:
+{ stdenv, fetchurl, glibmm, gstreamer, gst-plugins-base, libsigcxx, libxmlxx, pkgconfig }:
 
 let
   ver_maj = "0.10";
@@ -15,7 +15,7 @@ stdenv.mkDerivation rec {
   doCheck = false; # Tests require pulseaudio in /homeless-shelter
 
   propagatedBuildInputs = [
-    glibmm gstreamer gst_plugins_base libsigcxx libxmlxx
+    glibmm gstreamer gst-plugins-base libsigcxx libxmlxx
   ];
 
   nativeBuildInputs = [ pkgconfig ];
diff --git a/pkgs/development/libraries/gstreamer/legacy/qt-gstreamer/default.nix b/pkgs/development/libraries/gstreamer/legacy/qt-gstreamer/default.nix
index c0cab607062d..d298fbd7fc33 100644
--- a/pkgs/development/libraries/gstreamer/legacy/qt-gstreamer/default.nix
+++ b/pkgs/development/libraries/gstreamer/legacy/qt-gstreamer/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, gstreamer, gst_plugins_base, boost, glib, qt4, cmake
+{ stdenv, fetchurl, gstreamer, gst-plugins-base, boost, glib, qt4, cmake
 , automoc4, flex, bison, pkgconfig }:
 
 stdenv.mkDerivation rec {
@@ -10,7 +10,7 @@ stdenv.mkDerivation rec {
     sha256 = "1pqg9sxzk8sdrf7pazb5v21hasqai9i4l203gbdqz29w2ll1ybsl";
   };
 
-  buildInputs = [ gstreamer gst_plugins_base glib qt4 ];
+  buildInputs = [ gstreamer gst-plugins-base glib qt4 ];
   propagatedBuildInputs = [ boost ];
   nativeBuildInputs = [ cmake automoc4 flex bison pkgconfig ];
 
diff --git a/pkgs/development/libraries/libcanberra/default.nix b/pkgs/development/libraries/libcanberra/default.nix
index 8e3523a27e9f..25be48026992 100644
--- a/pkgs/development/libraries/libcanberra/default.nix
+++ b/pkgs/development/libraries/libcanberra/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl, pkgconfig, libtool, gtk ? null, libcap
-, alsaLib, libpulseaudio, gstreamer, gst_plugins_base, libvorbis }:
+, alsaLib, libpulseaudio, gstreamer, gst-plugins-base, libvorbis }:
 
 stdenv.mkDerivation rec {
   name = "libcanberra-0.30";
@@ -11,7 +11,7 @@ stdenv.mkDerivation rec {
 
   buildInputs = [
     pkgconfig libtool alsaLib libpulseaudio libvorbis gtk libcap
-    /*gstreamer gst_plugins_base*/      # ToDo: gstreamer not found (why?), add (g)udev?
+    /*gstreamer gst-plugins-base*/      # ToDo: gstreamer not found (why?), add (g)udev?
   ];
 
   configureFlags = "--disable-oss";
diff --git a/pkgs/development/libraries/qt-4.x/4.8/default.nix b/pkgs/development/libraries/qt-4.x/4.8/default.nix
index 8c8e311a93ed..0860a90192f0 100644
--- a/pkgs/development/libraries/qt-4.x/4.8/default.nix
+++ b/pkgs/development/libraries/qt-4.x/4.8/default.nix
@@ -3,7 +3,7 @@
 , libXfixes, libXrandr, libSM, freetype, fontconfig, zlib, libjpeg, libpng
 , libmng, which, mesaSupported, mesa, mesa_glu, openssl, dbus, cups, pkgconfig
 , libtiff, glib, icu, mysql, postgresql, sqlite, perl, coreutils, libXi
-, buildMultimedia ? stdenv.isLinux, alsaLib, gstreamer, gst_plugins_base
+, buildMultimedia ? stdenv.isLinux, alsaLib, gstreamer, gst-plugins-base
 , buildWebkit ? (stdenv.isLinux || stdenv.isDarwin)
 , flashplayerFix ? false, gdk_pixbuf
 , gtkStyle ? false, libgnomeui, gtk2, GConf, gnome_vfs
@@ -138,7 +138,7 @@ stdenv.mkDerivation rec {
         # Qt doesn't directly need GLU (just GL), but many apps use, it's small and doesn't remain a runtime-dep if not used
     ++ optional mesaSupported mesa_glu
     ++ optional ((buildWebkit || buildMultimedia) && stdenv.isLinux ) alsaLib
-    ++ optionals (buildWebkit || buildMultimedia) [ gstreamer gst_plugins_base ];
+    ++ optionals (buildWebkit || buildMultimedia) [ gstreamer gst-plugins-base ];
 
   # The following libraries are only used in plugins
   buildInputs =
diff --git a/pkgs/development/libraries/wxGTK-2.8/default.nix b/pkgs/development/libraries/wxGTK-2.8/default.nix
index 6b9aa4587350..cbfdf876dbaf 100644
--- a/pkgs/development/libraries/wxGTK-2.8/default.nix
+++ b/pkgs/development/libraries/wxGTK-2.8/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl, pkgconfig, gtk2, libXinerama, libSM, libXxf86vm, xf86vidmodeproto
-, gstreamer, gst_plugins_base, GConf, libX11, cairo
+, gstreamer, gst-plugins-base, GConf, libX11, cairo
 , withMesa ? true, mesa ? null, compat24 ? false, compat26 ? true, unicode ? true,
 }:
 
@@ -16,7 +16,7 @@ stdenv.mkDerivation rec {
     sha256 = "1l1w4i113csv3bd5r8ybyj0qpxdq83lj6jrc5p7cc10mkwyiagqz";
   };
 
-  buildInputs = [ gtk2 libXinerama libSM libXxf86vm xf86vidmodeproto gstreamer gst_plugins_base GConf libX11 cairo ]
+  buildInputs = [ gtk2 libXinerama libSM libXxf86vm xf86vidmodeproto gstreamer gst-plugins-base GConf libX11 cairo ]
     ++ optional withMesa mesa;
 
   nativeBuildInputs = [ pkgconfig ];
diff --git a/pkgs/development/libraries/wxGTK-2.9/default.nix b/pkgs/development/libraries/wxGTK-2.9/default.nix
index b2f40978f51b..e19f0bc3a765 100644
--- a/pkgs/development/libraries/wxGTK-2.9/default.nix
+++ b/pkgs/development/libraries/wxGTK-2.9/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl, pkgconfig, gtk2, libXinerama, libSM, libXxf86vm, xf86vidmodeproto
-, gstreamer, gst_plugins_base, GConf, setfile
+, gstreamer, gst-plugins-base, GConf, setfile
 , withMesa ? true, mesa ? null, compat24 ? false, compat26 ? true, unicode ? true
 , Carbon ? null, Cocoa ? null, Kernel ? null, QuickTime ? null, AGL ? null
 }:
@@ -21,7 +21,7 @@ stdenv.mkDerivation {
 
   buildInputs =
     [ gtk2 libXinerama libSM libXxf86vm xf86vidmodeproto gstreamer
-      gst_plugins_base GConf ]
+      gst-plugins-base GConf ]
     ++ optional withMesa mesa
     ++ optionals stdenv.isDarwin [ setfile Carbon Cocoa Kernel QuickTime ];
 
diff --git a/pkgs/development/libraries/wxGTK-3.0/default.nix b/pkgs/development/libraries/wxGTK-3.0/default.nix
index ed9372725146..f40595d4eacb 100644
--- a/pkgs/development/libraries/wxGTK-3.0/default.nix
+++ b/pkgs/development/libraries/wxGTK-3.0/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl, fetchpatch, pkgconfig, gtk2, libXinerama, libSM, libXxf86vm
-, xf86vidmodeproto , gstreamer, gst_plugins_base, GConf, setfile
+, xf86vidmodeproto , gstreamer, gst-plugins-base, GConf, setfile
 , withMesa ? true, mesa ? null, compat24 ? false, compat26 ? true, unicode ? true
 , withWebKit ? false, webkitgtk2 ? null
 , AGL ? null, Carbon ? null, Cocoa ? null, Kernel ? null, QTKit ? null
@@ -24,7 +24,7 @@ stdenv.mkDerivation {
 
   buildInputs =
     [ gtk2 libXinerama libSM libXxf86vm xf86vidmodeproto gstreamer
-      gst_plugins_base GConf ]
+      gst-plugins-base GConf ]
     ++ optional withMesa mesa
     ++ optional withWebKit webkitgtk2
     ++ optionals stdenv.isDarwin [ setfile Carbon Cocoa Kernel QTKit ];
diff --git a/pkgs/games/steam/runtime-wrapped.nix b/pkgs/games/steam/runtime-wrapped.nix
index d9d6e0ecf0d0..1988463d61a6 100644
--- a/pkgs/games/steam/runtime-wrapped.nix
+++ b/pkgs/games/steam/runtime-wrapped.nix
@@ -78,7 +78,7 @@ let
     SDL2_ttf
     SDL2_mixer
     gstreamer
-    gst_plugins_base
+    gst-plugins-base
   ] ++ lib.optional (!newStdcpp) gcc48.cc;
 
   overridePkgs = with pkgs; [
diff --git a/pkgs/os-specific/linux/bluez/bluez5.nix b/pkgs/os-specific/linux/bluez/bluez5.nix
index b54298124415..6185e22fb875 100644
--- a/pkgs/os-specific/linux/bluez/bluez5.nix
+++ b/pkgs/os-specific/linux/bluez/bluez5.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
       readline libsndfile udev libical
       # Disables GStreamer; not clear what it gains us other than a
       # zillion extra dependencies.
-      # gstreamer gst_plugins_base
+      # gstreamer gst-plugins-base
     ];
 
   outputs = [ "out" "dev" "test" ];
diff --git a/pkgs/os-specific/linux/bluez/bluez5_28.nix b/pkgs/os-specific/linux/bluez/bluez5_28.nix
index 8cd5e064e1ea..11aee0d88f2c 100644
--- a/pkgs/os-specific/linux/bluez/bluez5_28.nix
+++ b/pkgs/os-specific/linux/bluez/bluez5_28.nix
@@ -22,7 +22,7 @@ in stdenv.mkDerivation rec {
       readline libsndfile udev libical
       # Disables GStreamer; not clear what it gains us other than a
       # zillion extra dependencies.
-      # gstreamer gst_plugins_base 
+      # gstreamer gst-plugins-base 
     ];
 
   preConfigure = ''
diff --git a/pkgs/os-specific/linux/bluez/default.nix b/pkgs/os-specific/linux/bluez/default.nix
index d0a875516fa3..20b8d01db2d3 100644
--- a/pkgs/os-specific/linux/bluez/default.nix
+++ b/pkgs/os-specific/linux/bluez/default.nix
@@ -20,7 +20,7 @@ in stdenv.mkDerivation rec {
       readline libsndfile
       # Disables GStreamer; not clear what it gains us other than a
       # zillion extra dependencies.
-      # gstreamer gst_plugins_base 
+      # gstreamer gst-plugins-base 
     ];
 
   configureFlags = [
diff --git a/pkgs/tools/networking/uget/default.nix b/pkgs/tools/networking/uget/default.nix
index 8a60858526ee..b5119bc594b7 100644
--- a/pkgs/tools/networking/uget/default.nix
+++ b/pkgs/tools/networking/uget/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl, pkgconfig, intltool, openssl, curl, libnotify, gstreamer,
-  gst_plugins_base, gst-plugins-good, gnome3, makeWrapper, aria2 ? null }:
+  gst-plugins-base, gst-plugins-good, gnome3, makeWrapper, aria2 ? null }:
 
 stdenv.mkDerivation rec {
   name = "uget-${version}";
@@ -13,7 +13,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ pkgconfig intltool makeWrapper ];
   
   buildInputs = [
-    openssl curl libnotify gstreamer gst_plugins_base gst-plugins-good
+    openssl curl libnotify gstreamer gst-plugins-base gst-plugins-good
     gnome3.gtk gnome3.dconf
   ]
   ++ (stdenv.lib.optional (aria2 != null) aria2);
diff --git a/pkgs/tools/security/tor/torbrowser.nix b/pkgs/tools/security/tor/torbrowser.nix
index 12df8db832c1..fc77628a3c60 100644
--- a/pkgs/tools/security/tor/torbrowser.nix
+++ b/pkgs/tools/security/tor/torbrowser.nix
@@ -1,7 +1,7 @@
 { stdenv, fetchurl, makeDesktopItem
 , libXrender, libX11, libXext, libXt, alsaLib, dbus, dbus_glib, glib, gtk2
 , atk, pango, freetype, fontconfig, gdk_pixbuf, cairo, zlib
-, gstreamer, gst_plugins_base, gst-plugins-good, gst-ffmpeg, gmp, ffmpeg
+, gstreamer, gst-plugins-base, gst-plugins-good, gst-ffmpeg, gmp, ffmpeg
 , libpulseaudio
 , mediaSupport ? false
 }:
@@ -11,12 +11,12 @@ let
     stdenv.cc.cc zlib glib alsaLib dbus dbus_glib gtk2 atk pango freetype
     fontconfig gdk_pixbuf cairo libXrender libX11 libXext libXt
   ] ++ stdenv.lib.optionals mediaSupport [
-    gstreamer gst_plugins_base gmp ffmpeg
+    gstreamer gst-plugins-base gmp ffmpeg
     libpulseaudio
   ]);
 
   # Ignored if !mediaSupport
-  gstPlugins = [ gstreamer gst_plugins_base gst-plugins-good gst-ffmpeg ];
+  gstPlugins = [ gstreamer gst-plugins-base gst-plugins-good gst-ffmpeg ];
 
   gstPluginsPath = stdenv.lib.concatMapStringsSep ":" (x:
     "${x}/lib/gstreamer-0.10") gstPlugins;
diff --git a/pkgs/top-level/aliases.nix b/pkgs/top-level/aliases.nix
index efeb14eb4174..eaf6813263af 100644
--- a/pkgs/top-level/aliases.nix
+++ b/pkgs/top-level/aliases.nix
@@ -53,6 +53,7 @@ doNotDisplayTwice rec {
   googleAuthenticator = google-authenticator; # added 2016-10-16
   grantlee5 = qt5.grantlee;  # added 2015-12-19
   gst_ffmpeg = gst-ffmpeg;  # added 2017-02
+  gst_plugins_base = gst-plugins-base;  # added 2017-02
   gst_plugins_good = gst-plugins-good;  # added 2017-02
   gst_plugins_bad = gst-plugins-bad;  # added 2017-02
   gst_plugins_ugly = gst-plugins-ugly;  # added 2017-02
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index acd872768a2a..61949c9b4d98 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -1151,7 +1151,7 @@ with pkgs;
 
   clementine = callPackage ../applications/audio/clementine {
     boost = boost155;
-    gst_plugins = [ gst_plugins_base gst-plugins-good gst-plugins-ugly gst-ffmpeg ];
+    gst_plugins = [ gst-plugins-base gst-plugins-good gst-plugins-ugly gst-ffmpeg ];
   };
 
   clementineFree = clementine.free;
@@ -7519,14 +7519,14 @@ with pkgs;
 
   gst_all = {
     inherit (pkgs) gstreamer gnonlin gst-python qt-gstreamer;
-    gstPluginsBase = pkgs.gst_plugins_base;
+    gstPluginsBase = pkgs.gst-plugins-base;
     gstPluginsBad = pkgs.gst-plugins-bad;
     gstPluginsGood = pkgs.gst-plugins-good;
     gstPluginsUgly = pkgs.gst-plugins-ugly;
     gstFfmpeg = pkgs.gst-ffmpeg;
 
     # aliases with the dashed naming, same as in gst_all_1
-    gst-plugins-base = pkgs.gst_plugins_base;
+    gst-plugins-base = pkgs.gst-plugins-base;
     gst-plugins-bad = pkgs.gst-plugins-bad;
     gst-plugins-good = pkgs.gst-plugins-good;
     gst-plugins-ugly = pkgs.gst-plugins-ugly;
@@ -7537,7 +7537,7 @@ with pkgs;
     bison = bison2;
   };
 
-  gst_plugins_base = callPackage ../development/libraries/gstreamer/legacy/gst-plugins-base {
+  gst-plugins-base = callPackage ../development/libraries/gstreamer/legacy/gst-plugins-base {
     inherit (darwin.apple_sdk.frameworks) ApplicationServices;
   };