anchor.diff:  , callPackage
   }:
   
  -assert !isPy3k -> configparser != null;
  -
   let
   
    # This is a temporary convenience package for changes waiting to be merged into the primary rdflib repo.
  
positive.code: buildPythonPackage rec {
    pname = "nipype";
    version = "1.5.1";
  
    src = fetchPypi {
      inherit pname version;
  
negative.code:     simplejson
      traits
      xvfbwrapper
    ];
  
    checkInputs = [
  