anchor.diff:  , buildPythonPackage
   , fetchFromGitHub
   , pubnub
  +, pyjwt
   , pytestCheckHook
   , python-dateutil
   , pythonOlder
  
positive.code: 
  buildPythonPackage rec {
    pname = "yalexs";
    version = "1.1.20";
    format = "setuptools";
  
    disabled = pythonOlder "3.6";
  
negative.code:     owner = "bdraco";
      repo = pname;
      rev = "v${version}";
      sha256 = "sha256-qtJSGvvYcdGYUUHnRnKe+z+twFqLGAn1Zl47F4CGnvc=";
    };
  
    propagatedBuildInputs = [
      aiofiles
      aiohttp
      pubnub
      pyjwt
      python-dateutil
      requests
    ];
  