anchor.diff:  , mypy-extensions
   , pathspec
   , parameterized
  +, platformdirs
   , regex
   , tomli
   , typed-ast
  
positive.code:     colorama
      mypy-extensions
      pathspec
      regex
      tomli
      typed-ast # required for tests and python2 extra
  
negative.code: 
  buildPythonPackage rec {
    pname = "black";
    version = "21.8b0";
  
    disabled = pythonOlder "3.6";
  
    src = fetchPypi {
      inherit pname version;
      sha256 = "sha256-VwYI0oqjrxeSuYxKM326xjZ4d7R7EriKtCCVz8GmJ8I=";
    };
  
    nativeBuildInputs = [ setuptools-scm ];
  