anchor.diff:      owner = "Cereal2nd";
       repo = pname;
       rev = version;
  -    sha256 = "sha256-WywJ70tVniUX9RZTh9aswHgCEvWTggzABhSWoSRydUc=";
  +    sha256 = "sha256-vE25b95tWxsB+uJNVpXtY5AcJZo5qsBm6Jug1ckhz7k=";
     };
   
     propagatedBuildInputs = [
  +    backoff
       pyserial-asyncio
     ];
   
  
positive.code:     pytestCheckHook
    ];
  
    pythonImportsCheck = [ " velbusaio" ];
  
    meta = with lib; {
      description = "Python library to support the Velbus home automation system";
  
negative.code: { lib
  , backoff
  , buildPythonPackage
  , fetchFromGitHub
  , pythonOlder
  