anchor.diff:  { lib
   , buildPythonPackage
   , fetchFromGitHub
  +, bokeh
   , emcee
   , matplotlib
   , netcdf4
  
positive.code:   ];
  
    checkInputs = [
      emcee
      numba
      pytest
  
negative.code: 
  buildPythonPackage rec {
    pname = "arviz";
    version = "0.6.1";
  
    src = fetchFromGitHub {
      owner = "arviz-devs";
      repo = "arviz";
      rev = version;
      sha256 = "1qc4piz18hfik32gj4v65ckwv516mppq2ac0jyqs21lhqfwbgv9w";
    };
  
    propagatedBuildInputs = [
  