anchor.diff:  
   buildPythonPackage rec {
     pname = "catalogue";
  -  version = "2.1.0";
  +  version = "2.0.8";
     format = "setuptools";
   
     disabled = pythonOlder "3.6";
   
     src = fetchPypi {
       inherit pname version;
  -    sha256 = "sha256-oczi8XOKMd6yqiSz5Kieb7PoUlVcGDsOzaiivMHq7y4=";
  +    sha256 = "sha256-syXHdlkgi/tq8bDZOxoapBEuG7KaTFztgWdYpyLw44g=";
     };
   
     propagatedBuildInputs = lib.optionals (pythonOlder "3.8") [
  
positive.code:     homepage = "https://github.com/explosion/catalogue";
      changelog = "https://github.com/explosion/catalogue/releases/tag/v${version}";
      license = licenses.mit;
      maintainers = with maintainers; [ ];
    };
  }
  
negative.code:     pytestCheckHook
    ];
  
    pythonImportsCheck = [
      "catalogue"
    ];
  