anchor.diff:      sha256 = "2f0bb8ed0dc0ab21d683975d5d8ab3c054d588ce61def9faf7a465ee363e839b";
     };
   
  -  propagatedBuildInputs = [ dnspython greenlet monotonic six ]
  -    ++ lib.optional (pythonOlder "3.4") enum34;
  +  propagatedBuildInputs = [ dnspython greenlet pyopenssl six ]
  +    ++ lib.optional (pythonOlder "3.5") monotonic;
   
  -  checkInputs = [ nose pyopenssl ];
  +  checkInputs = [ nose ];
  +
  +  doCheck = !stdenv.isDarwin;
   
     preCheck = ''
       echo "nameserver 127.0.0.1" > resolv.conf
  
positive.code: { lib
  , buildPythonPackage
  , fetchPypi
  , pythonOlder
  , dnspython
  , enum34
  , greenlet
  , monotonic
  , six
  
negative.code:   # pythonImportsCheck = [ "eventlet" ];
  
    meta = with lib; {
      homepage = "https://github.com/eventlet/eventlet/";
      description = "A concurrent networking library for Python";
      maintainers = with maintainers; [ SuperSandro2000 ];
      license = licenses.mit;
  