anchor.diff:      pythonImportsCheckHook
     ];
   
  -  checkInputs = [ pytest parameterized nbsmoke flake8 coveralls xarray networkx streamz ];
     propagatedBuildInputs = [
       bokeh
       colorcet
  
positive.code:     pandas
    ];
  
    preCheck = ''
      export HOME=$(mktemp -d)
    '';
  
    # many tests require a network connection
    doCheck = false;
  
    pythonImportsCheck = [
  
negative.code: { lib
  , bokeh
  , buildPythonPackage
  , colorcet
  , fetchPypi
  , holoviews
  , pandas
  , pythonImportsCheckHook
  }:
  
  