anchor.diff:  
     nativeBuildInputs = [ cmake cython pkgconfig setuptools_scm ];
     propagatedBuildInputs = [ numpy six ] ++ lib.optionals (!isPy3k) [ futures ];
  -  checkInputs = [ pandas pytest pytestrunner JPype1 ];
  +  checkInputs = [ pandas pytest JPype1 ];
   
     PYARROW_BUILD_TYPE = "release";
     PYARROW_CMAKE_OPTIONS = "-DCMAKE_INSTALL_RPATH=${ARROW_HOME}/lib";
  
positive.code: 
    setupPyBuildFlags = ["--with-parquet" ];
  
    meta = with lib; {
      description = "A cross-language development platform for in-memory data";
      homepage = https://arrow.apache.org/;
  
negative.code: { lib, buildPythonPackage, python, isPy3k, fetchurl, arrow-cpp, cmake, cython, futures, JPype1, numpy, pandas, pytest, pkgconfig, setuptools_scm, six }:
  
  let
    _arrow-cpp = arrow-cpp.override { inherit python; };
  