anchor.diff:      unset NIX_REDIRECTS LD_PRELOAD
     '';
   
  -  checkInputs = [ pytest_32 case ];
  +  checkInputs = [ pytest case ];
     propagatedBuildInputs = [ kombu billiard pytz anyjson amqp eventlet ];
   
     meta = with stdenv.lib; {
  
positive.code:   pytest, case, kombu, billiard, pytz, anyjson, amqp, eventlet
  }:
  
  let
  
    # Needed for celery
    pytest_32 = pytest.overridePythonAttrs( oldAttrs: rec {
      version = "3.2.5";
      src = oldAttrs.src.override {
        inherit version;
        sha256 = "6d5bd4f7113b444c55a3bbb5c738a3dd80d43563d063fc42dcb0aaefbdd78b81";
      };
    });
  
  in buildPythonPackage rec {
    pname = "celery";
    version = "4.2.1";
  
  
negative.code:     sha256 = "0y66rz7z8dfcgs3s0qxmdddlaq57bzbgxgfz896nbp14grkv9nkp";
    };
  
    patches = [
      # Skip test_RedisBackend.test_timeouts_in_url_coerced
      # See https://github.com/celery/celery/pull/4847
      (fetchpatch {
        url = https://github.com/celery/celery/commit/b2668607c909c61becd151905b4525190c19ff4a.patch;
        sha256 = "11w0z2ycyh8kccj4y69zb7bxppiipcwwigg6jn1q9yrcsvz170jq";
      })
      # Allow usage of a newer pytest version
      # See https://github.com/celery/celery/pull/4912
      (fetchpatch {
        url = https://github.com/celery/celery/commit/16f56fe6f84cac9f92affac3ad06a1f168a19798.patch;
        sha256 = "0vz68rl32m34k51nhs898jcfdbj5m7cszzxx0w0j3j1fhn1wq594";
      })
    ];
  
    postPatch = ''
      substituteInPlace requirements/test.txt --replace ",<3.9" ""
    '';
  
    # make /etc/protocols accessible to fix socket.getprotobyname('tcp') in sandbox
    preCheck = stdenv.lib.optionalString stdenv.isLinux ''
  