diff --git a/pkgs/development/libraries/avahi/default.nix b/pkgs/development/libraries/avahi/default.nix
index cca6095616ba..ad7ba37568bd 100644
--- a/pkgs/development/libraries/avahi/default.nix
+++ b/pkgs/development/libraries/avahi/default.nix
@@ -1,6 +1,6 @@
 { fetchurl, stdenv, pkgconfig, libdaemon, dbus, perl, perlXMLParser
 , expat, gettext, intltool, glib, gtk, qt4 ? null, lib
-, qt4Support ? false }:
+, qt4Support ? false, ...}:
 
 assert qt4Support -> qt4 != null;
 
diff --git a/pkgs/development/libraries/consolekit/default.nix b/pkgs/development/libraries/consolekit/default.nix
index f93278531266..f41e8c6fbd1b 100644
--- a/pkgs/development/libraries/consolekit/default.nix
+++ b/pkgs/development/libraries/consolekit/default.nix
@@ -1,4 +1,5 @@
-{ stdenv, fetchurl, pkgconfig, dbus_glib, zlib, pam, glib, libX11, policykit, expat }:
+{ stdenv, fetchurl, pkgconfig, dbus_glib, zlib, pam, glib, 
+  libX11, policykit, expat, ... }:
 
 stdenv.mkDerivation rec {
   name = "consolekit-0.2.10";
diff --git a/pkgs/development/libraries/gstreamer/default.nix b/pkgs/development/libraries/gstreamer/default.nix
index a765510e7c0a..2170bcd845bf 100644
--- a/pkgs/development/libraries/gstreamer/default.nix
+++ b/pkgs/development/libraries/gstreamer/default.nix
@@ -1,29 +1,29 @@
 args: with args;
 rec {
-  gstreamer = import ./gstreamer {
+  gstreamer = makeOverridable (import ./gstreamer) {
     inherit (args) fetchurl stdenv perl bison flex
        pkgconfig python which gtkdoc glib libxml2;
   };
 
-  gstPluginsBase = import ./gst-plugins-base {
+  gstPluginsBase = makeOverridable (import ./gst-plugins-base) {
     inherit gstreamer;
     inherit (args) fetchurl stdenv pkgconfig python
       libX11 libXv libXext alsaLib cdparanoia libogg libtheora
       libvorbis freetype pango liboil gtk which gtkdoc;
   };
 
-  gstPluginsGood = import ./gst-plugins-good {
+  gstPluginsGood = makeOverridable (import ./gst-plugins-good) {
     inherit gstPluginsBase;
     inherit (args) fetchurl stdenv pkgconfig aalib cairo flac hal
       libjpeg zlib speex libpng libdv libcaca dbus libiec61883
       libavc1394 ladspaH taglib gdbm pulseaudio libsoup;
   };
 
-  gstFfmpeg = import ./gst-ffmpeg {
+  gstFfmpeg = makeOverridable (import ./gst-ffmpeg) {
     inherit fetchurl stdenv pkgconfig gstPluginsBase bzip2;
   };
 
-  gnonlin = import ./gnonlin {
+  gnonlin = makeOverridable (import ./gnonlin) {
     inherit fetchurl stdenv pkgconfig gstreamer gstPluginsBase;
   };
 }
diff --git a/pkgs/development/libraries/gstreamer/gst-ffmpeg/default.nix b/pkgs/development/libraries/gstreamer/gst-ffmpeg/default.nix
index 0b90ef27abfe..418d9644edca 100644
--- a/pkgs/development/libraries/gstreamer/gst-ffmpeg/default.nix
+++ b/pkgs/development/libraries/gstreamer/gst-ffmpeg/default.nix
@@ -1,4 +1,4 @@
-{ fetchurl, stdenv, pkgconfig, gstPluginsBase, bzip2 }:
+{ fetchurl, stdenv, pkgconfig, gstPluginsBase, bzip2, ... }:
 
 stdenv.mkDerivation rec {
   name = "gst-ffmpeg-0.10.5";
diff --git a/pkgs/development/libraries/gstreamer/gst-plugins-base/default.nix b/pkgs/development/libraries/gstreamer/gst-plugins-base/default.nix
index d41039cfd9fa..87815df2209f 100644
--- a/pkgs/development/libraries/gstreamer/gst-plugins-base/default.nix
+++ b/pkgs/development/libraries/gstreamer/gst-plugins-base/default.nix
@@ -1,7 +1,7 @@
 { fetchurl, stdenv, pkgconfig, python, gstreamer
 , libX11, libXv, libXext, alsaLib, cdparanoia , libogg
 , libtheora, libvorbis, freetype, pango
-, liboil, gtk, which, gtkdoc }:
+, liboil, gtk, which, gtkdoc, ... }:
 
 stdenv.mkDerivation rec {
   name = "gst-plugins-base-0.10.22";
diff --git a/pkgs/development/libraries/gstreamer/gst-plugins-good/default.nix b/pkgs/development/libraries/gstreamer/gst-plugins-good/default.nix
index e20620aecf1d..690be7115cad 100644
--- a/pkgs/development/libraries/gstreamer/gst-plugins-good/default.nix
+++ b/pkgs/development/libraries/gstreamer/gst-plugins-good/default.nix
@@ -1,7 +1,7 @@
 { fetchurl, stdenv, pkgconfig, gstPluginsBase, aalib, cairo
 , flac , hal, libjpeg, zlib, speex, libpng, libdv, libcaca, dbus
 , libiec61883, libavc1394, ladspaH, taglib, gdbm, pulseaudio
-, libsoup
+, libsoup, ...
 }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/development/libraries/gstreamer/gstreamer/default.nix b/pkgs/development/libraries/gstreamer/gstreamer/default.nix
index 96fdaf81a969..e0c2a5508359 100644
--- a/pkgs/development/libraries/gstreamer/gstreamer/default.nix
+++ b/pkgs/development/libraries/gstreamer/gstreamer/default.nix
@@ -1,5 +1,5 @@
 { fetchurl, stdenv, perl, bison, flex, pkgconfig, python
-, which, gtkdoc, glib, libxml2 }:
+, which, gtkdoc, glib, libxml2, ... }:
 
 stdenv.mkDerivation rec {
   name = "gstreamer-0.10.22";
diff --git a/pkgs/development/libraries/libjpeg/default.nix b/pkgs/development/libraries/libjpeg/default.nix
index b23c6fabf7b2..fb92fe995b66 100644
--- a/pkgs/development/libraries/libjpeg/default.nix
+++ b/pkgs/development/libraries/libjpeg/default.nix
@@ -1,4 +1,4 @@
-{stdenv, fetchurl, libtool, static ? false}: 
+{stdenv, fetchurl, libtool, static ? false, ...}: 
 
 stdenv.mkDerivation {
   name = "libjpeg-6b";
diff --git a/pkgs/development/libraries/liboil/default.nix b/pkgs/development/libraries/liboil/default.nix
index 1bfbb6bbff27..1e253ad78427 100644
--- a/pkgs/development/libraries/liboil/default.nix
+++ b/pkgs/development/libraries/liboil/default.nix
@@ -1,4 +1,4 @@
-{stdenv, fetchurl, pkgconfig, glib}:
+{stdenv, fetchurl, pkgconfig, glib, ...}:
 
 stdenv.mkDerivation rec {
   name = "liboil-0.3.15";
diff --git a/pkgs/development/libraries/libxml2/default.nix b/pkgs/development/libraries/libxml2/default.nix
index 287088f616e7..d1b151a3fee2 100644
--- a/pkgs/development/libraries/libxml2/default.nix
+++ b/pkgs/development/libraries/libxml2/default.nix
@@ -1,4 +1,4 @@
-{stdenv, fetchurl, zlib, python ? null, pythonSupport ? true}:
+{stdenv, fetchurl, zlib, python ? null, pythonSupport ? true, ...}:
 
 assert pythonSupport -> python != null;
 
diff --git a/pkgs/development/libraries/policykit/default.nix b/pkgs/development/libraries/policykit/default.nix
index 2aa7fdf29eb9..90ab6fb45bbd 100644
--- a/pkgs/development/libraries/policykit/default.nix
+++ b/pkgs/development/libraries/policykit/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl, pkgconfig, glib, dbus, dbus_glib, expat, pam
-, intltool, gettext, libxslt, docbook_xsl }:
+, intltool, gettext, libxslt, docbook_xsl, ... }:
 
 stdenv.mkDerivation rec {
   name = "policykit-0.9";
diff --git a/pkgs/os-specific/linux/udev/default.nix b/pkgs/os-specific/linux/udev/default.nix
index 21b9ce46eb97..988d0a3df3b9 100644
--- a/pkgs/os-specific/linux/udev/default.nix
+++ b/pkgs/os-specific/linux/udev/default.nix
@@ -1,4 +1,5 @@
-{stdenv, fetchurl, gperf, pkgconfig, glib, acl, libusb, usbutils, pciutils}:
+{stdenv, fetchurl, gperf, pkgconfig, glib, acl, 
+  libusb, usbutils, pciutils, ...}:
 
 assert stdenv ? glibc;
 
diff --git a/pkgs/os-specific/linux/util-linux-ng/default.nix b/pkgs/os-specific/linux/util-linux-ng/default.nix
index 4f916a4154bb..e70f2dfcb07b 100644
--- a/pkgs/os-specific/linux/util-linux-ng/default.nix
+++ b/pkgs/os-specific/linux/util-linux-ng/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, ncurses ? null }:
+{ stdenv, fetchurl, ncurses ? null, ... }:
 
 stdenv.mkDerivation rec {
   name = "util-linux-ng-2.16";
diff --git a/pkgs/servers/pulseaudio/default.nix b/pkgs/servers/pulseaudio/default.nix
index 73e63bebdc03..5f770c9cf7c9 100644
--- a/pkgs/servers/pulseaudio/default.nix
+++ b/pkgs/servers/pulseaudio/default.nix
@@ -1,6 +1,6 @@
 { stdenv, fetchurl, pkgconfig, gnum4, gdbm, libtool, glib, dbus, hal, avahi
 , gconf, liboil, libX11, libICE, libSM, intltool, gettext, alsaLib
-, libsamplerate, libsndfile, speex }:
+, libsamplerate, libsndfile, speex, ... }:
 
 stdenv.mkDerivation rec {
   name = "pulseaudio-0.9.13";
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 26e60aa3a859..7c4aeb02d564 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -191,9 +191,16 @@ let
   # let d = makeOverridable stdenv.mkDerivation { name = ..; buildInputs; }
   #     noBuildInputs = d.override { buildInputs = []; }
   #     additionalBuildInputs = d.override ( args : args // { buildInputs = args.buildInputs ++ [ additional ]; } )
+  deepOverride = newArgs: name: x: if builtins.isAttrs x then (
+    if x ? deepOverride then (x.deepOverride newArgs) else
+    if x ? override then (x.override newArgs) else 
+    x) else x;
   makeOverridable = f: origArgs: f origArgs //
     { override = newArgs:
         makeOverridable f (origArgs // (if builtins.isFunction newArgs then newArgs origArgs else newArgs));
+      deepOverride = newArgs: 
+        makeOverridable f ((lib.mapAttrs (deepOverride newArgs) origArgs) // newArgs);
+      origArgs = origArgs;
     };
 
 
@@ -439,7 +446,7 @@ let
   avahi =
     let qt4Support = getConfig [ "avahi" "qt4Support" ] false;
     in
-      import ../development/libraries/avahi {
+      makeOverridable (import ../development/libraries/avahi) {
         inherit stdenv fetchurl pkgconfig libdaemon dbus perl perlXMLParser
           expat gettext intltool lib;
         inherit (gtkLibs) glib gtk;
@@ -3058,7 +3065,9 @@ let
     inherit stdenv fetchurl lib;
   };
 
-  consolekit = import ../development/libraries/consolekit {
+  consolekit = makeOverridable 
+      (import ../development/libraries/consolekit) 
+  {
     inherit stdenv fetchurl pkgconfig dbus_glib zlib pam policykit expat;
     inherit (gtkLibs) glib;
     inherit (xlibs) libX11;
@@ -3111,16 +3120,13 @@ let
     useX11 = true; # !!! `false' doesn't build
   };
 
-  dbus_glib = import ../development/libraries/dbus-glib {
+  dbus_glib = makeOverridable 
+      (import ../development/libraries/dbus-glib) 
+  {
     inherit fetchurl stdenv pkgconfig gettext dbus expat;
     inherit (gtkLibs) glib;
   };
 
-  dbus_glib_gtk_218 = import ../development/libraries/dbus-glib {
-    inherit fetchurl stdenv pkgconfig gettext dbus expat;
-    inherit (gtkLibs218) glib;
-  };
-
   dclib = import ../development/libraries/dclib {
     inherit fetchurl stdenv libxml2 openssl bzip2;
   };
@@ -3129,7 +3135,9 @@ let
     inherit fetchurl stdenv perl;
   };
 
-  enchant = selectVersion ../development/libraries/enchant "1.3.0" {
+  enchant = makeOverridable 
+      (selectVersion ../development/libraries/enchant "1.3.0") 
+  {
     inherit fetchurl stdenv aspell pkgconfig;
     inherit (gnome) glib;
   };
@@ -3393,7 +3401,7 @@ let
     inherit lib selectVersion stdenv fetchurl perl bison pkgconfig libxml2
       python alsaLib cdparanoia libogg libvorbis libtheora freetype liboil
       libjpeg zlib speex libpng libdv aalib cairo libcaca flac hal libiec61883
-      dbus libavc1394 ladspaH taglib pulseaudio gdbm bzip2 which;
+      dbus libavc1394 ladspaH taglib pulseaudio gdbm bzip2 which makeOverridable;
     flex = flex2535;
     inherit (xorg) libX11 libXv libXext;
     inherit (gtkLibs) glib pango gtk;
@@ -3402,18 +3410,6 @@ let
     libsoup = gnome26.libsoup;
   });
 
-  gst_all_gtk_218 = recurseIntoAttrs (import ../development/libraries/gstreamer {
-    inherit lib selectVersion stdenv fetchurl perl bison pkgconfig libxml2
-      python alsaLib cdparanoia libogg libvorbis libtheora freetype liboil
-      libjpeg zlib speex libpng libdv aalib cairo libcaca flac hal libiec61883
-      dbus libavc1394 ladspaH taglib pulseaudio gdbm bzip2 which;
-    flex = flex2535;
-    inherit (xorg) libX11 libXv libXext;
-    inherit (gtkLibs218) glib pango gtk;
-    inherit (gnome28) gnomevfs /* <- only passed for the no longer used older versions
-             it is deprecated and didn't build on amd64 due to samba dependency */ gtkdoc libsoup;
-  });
-
   gnet = import ../development/libraries/gnet {
     inherit fetchurl stdenv pkgconfig;
     inherit (gtkLibs) glib;
@@ -3832,7 +3828,9 @@ let
     inherit fetchurl stdenv;
   };
 
-  liboil = import ../development/libraries/liboil {
+  liboil = makeOverridable 
+      (import ../development/libraries/liboil) 
+  {
     inherit fetchurl stdenv pkgconfig;
     inherit (gtkLibs) glib;
   };
@@ -4174,7 +4172,7 @@ let
     inherit (gtkLibs) glib;
   };
 
-  policykit = import ../development/libraries/policykit {
+  policykit = makeOverridable (import ../development/libraries/policykit) {
     inherit stdenv fetchurl pkgconfig dbus dbus_glib expat pam
       intltool gettext libxslt docbook_xsl;
     inherit (gtkLibs) glib;
@@ -4407,18 +4405,26 @@ let
    inherit fetchurl stdenv cmake unzip libtiff expat zlib libpng libjpeg;
   };
 
-  webkit = builderDefsPackage (import ../development/libraries/webkit) {
+  webkit = builderDefsPackage (import ../development/libraries/webkit) 
+  (lib.mapAttrs (deepOverride
+    {
+      # It needs fresh GTK
+      inherit (gnome28) gtkdoc libsoup GConf;
+      inherit (gtkLibs218) gtk atk pango glib;
+      gconf = gnome28.GConf;
+    })
+  {
     inherit (gnome28) gtkdoc libsoup;
-    inherit (gtkLibs218) gtk atk pango;
+    inherit (gtkLibs218) gtk atk pango glib;
     inherit freetype fontconfig gettext gperf curl
       libjpeg libtiff libpng libxml2 libxslt sqlite
       icu cairo perl intltool automake libtool
       pkgconfig autoconf bison libproxy enchant;
-    inherit (gst_all_gtk_218) gstreamer gstPluginsBase gstFfmpeg
+    inherit (gst_all) gstreamer gstPluginsBase gstFfmpeg
       gstPluginsGood;
     flex = flex2535;
     inherit (xlibs) libXt;
-  };
+  });
 
   wxGTK = wxGTK26;
 
@@ -4856,7 +4862,7 @@ let
     inherit fetchurl stdenv db4 openssl cyrus_sasl glibc;
   };
 
-  pulseaudio = import ../servers/pulseaudio {
+  pulseaudio = makeOverridable (import ../servers/pulseaudio) {
     inherit fetchurl stdenv pkgconfig gnum4 gdbm
       dbus hal avahi liboil libsamplerate libsndfile speex
       intltool gettext;
@@ -5144,7 +5150,7 @@ let
     flex = flex2535;
   };
 
-  hal = import ../os-specific/linux/hal {
+  hal = makeOverridable (import ../os-specific/linux/hal) {
     inherit fetchurl stdenv pkgconfig python pciutils usbutils expat
       libusb dbus dbus_glib libuuid perl perlXMLParser
       gettext zlib eject libsmbios udev gperf dmidecode utillinuxng
@@ -5993,7 +5999,7 @@ let
     inherit (xlibs) libX11 xproto;
   };*/
 
-  udev = import ../os-specific/linux/udev {
+  udev = makeOverridable (import ../os-specific/linux/udev) {
     inherit fetchurl stdenv gperf pkgconfig acl libusb usbutils pciutils;
     inherit (gtkLibs) glib;
   };
@@ -8137,7 +8143,15 @@ let
 
   gnome28 = import ../desktops/gnome-2.28 (pkgs// {
     gtkLibs = gtkLibs218;
-    dbus_glib = dbus_glib_gtk_218;
+    dbus_glib = dbus_glib.override {
+        inherit (gtkLibs218) glib; 
+      };
+    policykit = policykit.deepOverride {
+        inherit (gtkLibs218) glib; 
+      };
+    hal = hal.deepOverride {
+        inherit (gtkLibs218) glib; 
+      };
   });
 
   kde3 = {