anchor.diff:  
   buildPythonPackage rec {
     pname = "zigpy";
  -  version = "0.50.3";
  +  version = "0.51.2";
     format = "setuptools";
   
     disabled = pythonOlder "3.7";
  
positive.code: , freezegun
  , fetchFromGitHub
  , pycryptodome
  , pytest-aiohttp
  , pytest-timeout
  , pytestCheckHook
  
negative.code:     owner = "zigpy";
      repo = "zigpy";
      rev = "refs/tags/${version}";
      hash = "sha256-6JHj75ntbW3Pu4P6/nw0/xhZ+fZCfpNCzB1ZB7WJ0jY=";
    };
  
    propagatedBuildInputs = [
  