anchor.diff:  { lib
  +, bokeh
   , buildPythonPackage
  +, colorcet
   , fetchPypi
  -, bokeh
   , holoviews
   , pandas
  -, pytest
  -, parameterized
  -, nbsmoke
  -, flake8
  -, coveralls
  -, xarray
  -, networkx
  -, streamz
  -, colorcet
   , pythonImportsCheckHook
   }:
   
  
positive.code:     pythonImportsCheckHook
    ];
  
    checkInputs = [ pytest parameterized nbsmoke flake8 coveralls xarray networkx streamz ];
    propagatedBuildInputs = [
      bokeh
      colorcet
  
negative.code:     pandas
    ];
  
    # Many tests require a network connection
    doCheck = false;
  
    pythonImportsCheck = [
  