anchor.diff:      sha256 = "1421d3b84a0885aeb2c4bdc9e8896729c0f053a9375596c9de8864e055e2ac8e";
     };
   
  -  disabled = pythonOlder "3.6";
  -
  -  checkInputs = [ pytest pytest-repeat pytest-timeout mock joblib ];
     propagatedBuildInputs = [
         click cloudpickle dask msgpack psutil six
         sortedcontainers tblib toolz tornado zict pyyaml mpi4py bokeh
     ];
   
  -  # tests take about 10-15 minutes
  -  # ignore 5 cli tests out of 1000 total tests that fail due to subprocesses
  -  # these tests are not critical to the library (only the cli)
  -  checkPhase = ''
  -    py.test distributed -m "not avoid-travis" -r s --timeout-method=thread --timeout=0 --durations=20 --ignore="distributed/cli/tests"
  -  '';
  -
     # when tested random tests would fail and not repeatably
     doCheck = false;
  +  pythonImportsCheck = [ "distributed" ];
   
     meta = {
       description = "Distributed computation in Python.";
  
positive.code: buildPythonPackage rec {
    pname = "distributed";
    version = "2.30.1";
  
    # get full repository need conftest.py to run tests
    src = fetchPypi {
  
negative.code: , tornado
  , zict
  , pyyaml
  , mpi4py
  , bokeh
  , pythonOlder
  