anchor.diff:  , fetchFromGitHub
   , pythonOlder
   , CommonMark
  -, colorama
   , dataclasses
   , poetry-core
   , pygments
  
positive.code:     owner = "Textualize";
      repo = pname;
      rev = "v${version}";
      sha256 = "19k8c8jnqj1v0ji8kkx3r2ny6wlpwy58ir7lyrh2qyjvzkw08i58";
    };
  
    nativeBuildInputs = [ poetry-core ];
  
    propagatedBuildInputs = [
      CommonMark
      colorama
      pygments
      typing-extensions
    ] ++ lib.optional (pythonOlder "3.7") [
      dataclasses
    ];
  
    checkInputs = [
  
negative.code: 
  buildPythonPackage rec {
    pname = "rich";
    version = "12.0.1";
    format = "pyproject";
    disabled = pythonOlder "3.6";
  
  