anchor.diff:  { lib
   , buildPythonPackage
  -, colorama
   , docutils
   , fetchFromGitHub
   , importlib-metadata
  
positive.code: , pytestCheckHook
  , pythonOlder
  , rstcheck-core
  , shellingham
  , typer
  , types-docutils
  , typing-extensions
  
negative.code:   ] ++ lib.optionals (pythonOlder "3.8") [
      typing-extensions
      importlib-metadata
    ] ++ typer.optional-dependencies.all;
  
    checkInputs = [
      pytestCheckHook
  