anchor.diff:    protobuf = buildPythonPackage rec {
       inherit (pkgs.protobuf) name src;
   
  -    propagatedBuildInputs = [ pkgs.protobuf setuptools ];
  +    propagatedBuildInputs = [ pkgs.protobuf google_apputils  ];
       sourceRoot = "${name}/python";
  +    
   
       meta = {
         description = "Protocol Buffers are Google's data interchange format.";
  
positive.code: 
    taskcoach = buildPythonPackage rec {
      name = "TaskCoach-1.3.22";
  
      src = fetchurl {
        url = "mirror://sourceforge/taskcoach/${name}.tar.gz";
  
negative.code: 
     google_apputils = buildPythonPackage rec {
      name = "google-apputils-0.4.0";
      disabled = isPy3k;
  
      src = fetchurl {
        url = http://pypi.python.org/packages/source/g/google-apputils/google-apputils-0.4.0.tar.gz;
  