A case study in transitive overrides. WebKit needs fresh glib. This means it needs a whole slice of system built against glib-2.22.. Added overrides are generic enough, though. So the same way can be used to override everything. I have failed (so far?) to add mkOverridable into stdenv, though.

svn path=/nixpkgs/trunk/; revision=17661

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";