anchor.diff:    postPatch = ''
       sed -i -e "/audio-metadata/c\'audio-metadata'," -e "/marshmallow/c\'marshmallow'," setup.py
       substituteInPlace setup.py \
  -      --replace "pendulum>=2.0,<=3.0,!=2.0.5,!=2.1.0" "pendulum>=2.0,<=3.0"
  +      --replace "'attrs>=18.2,<19.4'" "'attrs'"
     '';
   
     propagatedBuildInputs = [
  
positive.code: buildPythonPackage rec {
    pname = "google-music-proto";
    version = "2.10.0";
    disabled = pythonOlder "3.6";
  
    src = fetchPypi {
      inherit pname version;
  
negative.code: { lib
  , buildPythonPackage
  , fetchPypi
  , pythonOlder
  , attrs
  , audio-metadata
  , importlib-metadata
  