anchor.diff:  
     checkInputs = [ hypothesis pytest pytest-asyncio ];
   
  +  doCheck = !stdenv.isDarwin; # most tests fail on darwin
  +
     checkPhase = ''
  -    # Other tests fail, seems to be due to filesystem access
  -    py.test -k "test_cli or test_utils"
  +    py.test
     '';
   
     meta = with stdenv.lib; {
  
positive.code: }:
  buildPythonPackage rec {
    pname = "daphne";
    version = "2.1.0";
  
    disabled = !isPy3k;
  
  
negative.code:     owner = "django";
      repo = pname;
      rev = version;
      sha256 = "1pr3b7zxjp2jx31lpiy1hfyprpmyiv2kd18n8x6kh6gd5nr0dgp8";
    };
  
    nativeBuildInputs = [ pytestrunner ];
  