anchor.diff:  , patsy
   , bids-validator
   , sqlalchemy
  -, pytest
  -, pathlib
  +, pytestCheckHook
   }:
   
   buildPythonPackage rec {
  
positive.code: { buildPythonPackage
  , lib
  , fetchPypi
  , isPy27
  , click
  , num2words
  , numpy
  
negative.code:     sqlalchemy
    ];
  
    checkInputs = [ pytestCheckHook ];
    pythonImportsCheck = [ "bids" ];
  
    meta = with lib; {
      description = "Python tools for querying and manipulating BIDS datasets";
  