anchor.diff:  , tornado
   , zict
   , pyyaml
  -, isPy3k
  -, futures
  -, singledispatch
   , mpi4py
   , bokeh
   , pythonOlder
  
positive.code: { lib
  , buildPythonPackage
  , fetchPypi
  , pytest
  , pytest-repeat
  , pytest-timeout
  , mock
  , joblib
  , click
  , cloudpickle
  , dask
  
negative.code:     sha256 = "1421d3b84a0885aeb2c4bdc9e8896729c0f053a9375596c9de8864e055e2ac8e";
    };
  
    propagatedBuildInputs = [
        click cloudpickle dask msgpack psutil six
        sortedcontainers tblib toolz tornado zict pyyaml mpi4py bokeh
    ];
  
    # when tested random tests would fail and not repeatably
    doCheck = false;
    pythonImportsCheck = [ "distributed" ];
  
    meta = {
      description = "Distributed computation in Python.";
  