anchor.diff:  
   buildPythonPackage rec {
     pname = "google-music-proto";
  -  version = "2.5.1";
  +  version = "2.8.0";
  +  disabled = pythonOlder "3.6";
   
     src = fetchPypi {
       inherit pname version;
  -    sha256 = "94cd205b3cb0d9e36f3724ace259d4c6de04db97e095577a26a5cfa5e35844c6";
  +    sha256 = "10qraipdr18pwnr1dz6ai5vxs9lmww5wbavbh1xyg4lsggmlsrqb";
     };
  +
  +  postPatch = ''
  +    sed -i -e "/audio-metadata/c\'audio-metadata'," -e "/marshmallow/c\'marshmallow'," setup.py
  +  '';
   
     propagatedBuildInputs = [
       attrs
  
positive.code: { lib, buildPythonPackage, fetchPypi, pythonOlder
  , attrs
  , audio-metadata
  , marshmallow
  , pendulum
  , protobuf
  
negative.code:     marshmallow
      pendulum
      protobuf
    ] ++ lib.optionals (pythonOlder "3.8") [
      importlib-metadata
    ];
  
    # No tests
    doCheck = false;
    pythonImportsCheck = [ "google_music_proto" ];
  
    meta = with lib; {
      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 ];
  