anchor.diff:  , lib
   , buildPythonPackage
   , fetchFromGitHub
  +, pythonAtLeast
   , pythonOlder
   , installShellFiles
   , astroid
   , dill
   , isort
  -, GitPython
   , mccabe
   , platformdirs
  -, toml
  +, tomli
  +, typing-extensions
  +, GitPython
   , pytest-benchmark
   , pytest-timeout
   , pytest-xdist
  
positive.code: 
    checkInputs = [
      GitPython
      pytest-benchmark
      pytest-timeout
      pytest-xdist
      pytestCheckHook
    ];
  
    dontUseSetuptoolsCheck = true;
  
negative.code:     isort
      mccabe
      platformdirs
    ] ++ lib.optionals (pythonOlder "3.11") [
      tomli
    ] ++ lib.optionals (pythonOlder "3.9") [
      typing-extensions
    ];
  
    postInstall = ''
  