anchor.diff:  { lib
   , buildPythonPackage
   , fetchFromGitHub
  -, pytest
  +, pytestCheckHook
   , six
   , enum34
   , pathlib
  
positive.code:   # Test suite is broken.
    # See https://github.com/Kronuz/pyScss/issues/415
    doCheck = false;
    checkPhase = ''
      py.test
    '';
  
    meta = with lib; {
      description = "A Scss compiler for Python";
      homepage = "https://pyscss.readthedocs.org/en/latest/";
      license = licenses.mit;
    };
  
  }
  
negative.code:     sha256 = "sha256-z0y4z+/JE6rZWHAvps/taDZvutyVhxxs2gMujV5rNu4=";
    };
  
    checkInputs = [ pytestCheckHook ];
  
    propagatedBuildInputs = [ six ]
      ++ lib.optionals (pythonOlder "3.4") [ enum34 pathlib ];
  