anchor.diff:      '';
   
       propagatedBuildInputs = with self; [ gflags iso8601 ipaddr httplib2 google_apputils google_api_python_client ];
  +  };
  +
  +  gmusicapi = with pkgs; pythonPackages.buildPythonPackage rec {
  +    name = "gmusicapi-4.0.0";
  +
  +    src = pkgs.fetchurl {
  +      url = "https://pypi.python.org/packages/source/g/gmusicapi/gmusicapi-4.0.0.tar.gz";
  +      md5 = "12ba66607531978b349c7035c9bab311";
  +    };
  +
  +    propagatedBuildInputs = with pythonPackages; [
  +      validictory
  +      decorator
  +      mutagen
  +      protobuf
  +      setuptools
  +      requests
  +      dateutil
  +      proboscis
  +      mock
  +      appdirs
  +      oauth2client
  +    ];
  +    doCheck = false;
  +
  +    meta = with stdenv.lib; {
  +      description = "An unofficial API for Google Play Music";
  +      homepage = http://pypi.python.org/pypi/gmusicapi/;
  +      license = licenses.bsd3;
  +    };
     };
   
     gnutls = buildPythonPackage rec {
  
positive.code:     meta = with stdenv.lib; {
        description = "rarfile - RAR archive reader for Python";
        homepage = https://github.com/markokr/rarfile;
      };
    };
  
  
negative.code:   nameparser = buildPythonPackage rec {
      name = "nameparser-${version}";
      version = "0.3.4";
  
      src = pkgs.fetchurl {
        url = "https://pypi.python.org/packages/source/n/nameparser/${name}.tar.gz";
        sha256 = "1zi94m99ziwwd6kkip3w2xpnl05r2cfv9iq68inz7np81c3g8vag";
      };
  
      meta = {
        description = "A simple Python module for parsing human names into their individual components";
        homepage = https://github.com/derek73/python-nameparser;
  