anchor.diff:  
   buildPythonPackage rec {
     pname = "tcxreader";
  -  version = "0.4.1";
  +  version = "0.4.2";
     format = "setuptools";
   
     disabled = pythonOlder "3.7";
  
positive.code:   ];
  
    meta = with lib; {
      description = "A reader for Garmin’s TCX file format.";
      homepage = "https://github.com/alenrajsp/tcxreader";
      license = licenses.mit;
      maintainers = with maintainers; [ firefly-cpp ];
  
negative.code:     owner = "alenrajsp";
      repo = "tcxreader";
      rev = "v${version}";
      hash = "sha256-YJDuyInO5FCIdz7xE29qOpuH6rPKvO4FZChjgXdc+Aw=";
    };
  
    checkInputs = [
  