anchor.diff:      maintainers = with maintainers; [ veprbl cpcloud ];
     };
   }
  +
  +
  
positive.code: { lib, stdenv, buildPythonPackage, python, isPy3k, arrow-cpp, cmake, cython, hypothesis, numpy, pandas, pytestCheckHook, pytest-lazy-fixture, pkg-config, setuptools-scm, six }:
  
  let
    zero_or_one = cond: if cond then 1 else 0;
  
negative.code: 
    nativeBuildInputs = [ cmake cython pkg-config setuptools-scm ];
    propagatedBuildInputs = [ numpy six ];
    checkInputs = [
      hypothesis
      pandas
      pytestCheckHook
      pytest-lazy-fixture
    ];
  
    PYARROW_BUILD_TYPE = "release";
  
  