anchor.diff:      protobuf
       cryptography
       netifaces
  +    zeroconf
  +    pytestCheckHook
     ];
   
     checkInputs = [
  
positive.code: { stdenv, buildPythonPackage, fetchPypi
  , aiohttp
  , aiozeroconf
  , asynctest
  
negative.code:     pytest-asyncio
    ];
  
    meta = with stdenv.lib; {
      description = "A python client library for the Apple TV";
      homepage = "https://github.com/postlund/pyatv";
  