anchor.diff:      runHook postCheck
     '';
   
  +  # Tests do no seem to be compatible yet with pytest 5.1
  +  # https://github.com/crossbario/autobahn-python/issues/1235
  +  doCheck = false;
  +
     meta = with lib; {
       description = "WebSocket and WAMP in Python for Twisted and asyncio.";
       homepage    = "https://crossbar.io/autobahn";
  
positive.code:     sha256 = "294e7381dd54e73834354832604ae85567caf391c39363fed0ea2bfa86aa4304";
    };
  
    propagatedBuildInputs = [ six txaio twisted zope_interface cffi ] ++
      (lib.optionals (!isPy3k) [ trollius futures ]);
  
    checkInputs = [ mock pytest ];
  
negative.code: { lib, buildPythonPackage, fetchPypi, isPy3k,
    six, txaio, twisted, zope_interface, cffi, trollius, futures,
    mock, pytest, cryptography, pynacl
  }:
  buildPythonPackage rec {
    pname = "autobahn";
  