anchor.diff: -{stdenv, fetchurl, pkgconfig, python, cython, pygtk, xlibs, gtk, ffmpeg, x264, libvpx, makeWrapper}:
  +{ stdenv, fetchurl, pkgconfig, python, cython
  +, pygtk, pygobject, pycairo, xlibs, gtk
  +, ffmpeg, x264, libvpx, makeWrapper}:
   
  -stdenv.mkDerivation {
  +stdenv.mkDerivation rec {
     name = "xpra-0.3.2";
     
     src = fetchurl {
  
positive.code:     sha256 = "1s1z6r0r78qvf59ci3vxammjz7lj5m64jyk0bfn7yxd5jl3sy41y";
    };
  
    buildInputs = [
      pkgconfig python cython pygtk gtk ffmpeg x264 libvpx makeWrapper
      xlibs.inputproto xlibs.libXcomposite xlibs.libXdamage xlibs.libXtst
    ];
  
  
negative.code:     ./do-build
    '';
  
    pythonPaths = [
      "$out/lib/python"
      "$(toPythonPath ${pygtk})/gtk-2.0"
    ] ++ map (i: "$(toPythonPath ${i})") [
      pygobject pycairo notify
    ];
  
    installPhase = ''
      mkdir -p $out
      cp -r install/* $out
  
      for i in $(cd $out/bin && ls); do
          wrapProgram $out/bin/$i \
              --set PYTHONPATH "${stdenv.lib.concatStringsSep ":" pythonPaths}" \
              --prefix PATH : "${xlibs.xauth}/bin:${xlibs.xorgserver}/bin:${xlibs.xmodmap}/bin"
      done
    '';
  