anchor.diff:  , pytest
   , pytest_xdist
   , pytest-forked
  +, rdflib
   , scipy
   , simplejson
   , traits
  
positive.code:     simplejson
      traits
      xvfbwrapper
    ];
  
    checkInputs = [
      pybids
  
negative.code: , bash
  , glibcLocales
  , callPackage
  # causes Python packaging conflict with any package requiring rdflib,
  # so use the unpatched rdflib by default (disables Nipype provenance tracking);
  # see https://github.com/nipy/nipype/issues/2888:
  , useNeurdflib ? false
  }:
  
  let
  