anchor.diff:      marshmallow
       pendulum
       protobuf
  +  ] ++ lib.optionals (pythonOlder "3.8") [
  +    importlib-metadata
     ];
   
     # No tests
     doCheck = false;
  -
  -  disabled = pythonOlder "3.6";
  +  pythonImportsCheck = [ "google_music_proto" ];
   
     meta = with lib; {
  -    homepage = https://github.com/thebigmunch/google-music-proto;
  +    homepage = "https://github.com/thebigmunch/google-music-proto";
       description = "Sans-I/O wrapper of Google Music API calls";
       license = licenses.mit;
       maintainers = with maintainers; [ jakewaksbaum ];
  
positive.code: { lib, buildPythonPackage, fetchPypi, pythonOlder
  , attrs
  , audio-metadata
  , marshmallow
  , pendulum
  , protobuf
  
negative.code: 
  buildPythonPackage rec {
    pname = "google-music-proto";
    version = "2.8.0";
    disabled = pythonOlder "3.6";
  
    src = fetchPypi {
      inherit pname version;
      sha256 = "10qraipdr18pwnr1dz6ai5vxs9lmww5wbavbh1xyg4lsggmlsrqb";
    };
  
    postPatch = ''
      sed -i -e "/audio-metadata/c\'audio-metadata'," -e "/marshmallow/c\'marshmallow'," setup.py
    '';
  
    propagatedBuildInputs = [
      attrs
  