anchor.diff:  with stdenv.lib;
   
   let
  -  libPath = makeLibraryPath ([
  +  libPath = makeLibraryPath libPkgs;
  +
  +  libPkgs = [
       atk
       cairo
       dbus
  
positive.code: # Pluggable transport dependencies
  , python27
  
  # Extra preferences
  , extraPrefs ? ""
  }:
  
negative.code:     gst-plugins-base
      gmp
      ffmpeg
    ];
  
    gstPluginsPath = concatMapStringsSep ":" (x:
      "${x}/lib/gstreamer-0.10") [
  