anchor.diff:  { lib
  +, stdenv
   , buildPythonPackage
   , fetchFromGitHub
   , pythonOlder
  
positive.code:     pytestCheckHook
    ];
  
    pythonImportsCheck = [ "rich" ];
  
    meta = with lib; {
      description = "Render rich text, tables, progress bars, syntax highlighting, markdown and more to the terminal";
      homepage = "https://github.com/Textualize/rich";
      license = licenses.mit;
      maintainers = with maintainers; [ ris ];
    };
  }
  
negative.code:     owner = "Textualize";
      repo = pname;
      rev = "v${version}";
      sha256 = "sha256-FjzvFx+A4DS2XeKBZ2DGRqudvH22AUSQJnIxKs2O0AU=";
    };
  
    nativeBuildInputs = [ poetry-core ];
  