anchor.diff:    src = fetchurl {
       url = "http://www.galago-project.org/files/releases/source/notify-python/"
         + "${name}.tar.bz2";
  +    multihash = "QmR6QMACtcHr8hBbCg1MZgJ5CwMXTRbrjkQiECUFDQm7rL";
       sha256 = "7d3bbb7c3d8f56c922cc31d02ef9057a4f06998cc2fd4f3119a576fcf8d504ce";
     };
   
     buildInputs = [
  -    pkgs.libnotify
  -    pythonPackages.pygtk
  -    pythonPackages.python
  +    libnotify
  +    pygtk
  +    python
     ];
   
     patches = [
  
positive.code:     rm -fv src/pynotify.c
  
      sed -i configure \
        -e '/^PYGTK_CODEGEN/s|=.*|="${pythonPackages.pygtk}/bin/pygtk-codegen-2.0"|'
    '';
  
    postInstall = ''
      pushd $out/lib/python*/site-packages
        ln -s gtk-*/pynotify .
      popd
    '';
  
  
negative.code: , fetchTritonPatch
  , fetchurl
  
  , libnotify
  , pygtk
  , python
  }:
  
  stdenv.mkDerivation rec {
  