anchor.diff:      cryptography
       netifaces
       zeroconf
  -    pytestCheckHook
     ];
   
     checkInputs = [
  
positive.code: 
  buildPythonPackage rec {
    pname = "pyatv";
    version = "v0.7.4";
  
    src = fetchFromGitHub {
      owner = "postlund";
      repo = pname;
      rev = version;
      sha256 = "17gsamn4aibsx4w50r9dwr5kr9anc7dd0f0dvmdl717rkgh13zyi";
    };
  
  
negative.code:     pytest
      pytest-aiohttp
      pytest-asyncio
      pytestCheckHook
    ];
  
    meta = with stdenv.lib; {
  