anchor.diff:  
     meta = {
       description = "A  cross-language development platform for in-memory data";
  -    homepage = https://arrow.apache.org/;
  +    homepage = "https://arrow.apache.org/";
       license = stdenv.lib.licenses.asl20;
       platforms = stdenv.lib.platforms.unix;
       maintainers = with stdenv.lib.maintainers; [ tobim veprbl ];
  
positive.code: { stdenv, fetchurl, fetchFromGitHub, fixDarwinDylibNames, autoconf, boost, brotli, cmake, double-conversion, flatbuffers, gflags, glog, gtest, lz4, perl, python, rapidjson, snappy, thrift, uriparser, which, zlib, zstd }:
  
  let
    parquet-testing = fetchFromGitHub {
  
negative.code:   ] ++ stdenv.lib.optional (!stdenv.isx86_64) "-DARROW_USE_SIMD=OFF";
  
    doInstallCheck = true;
    PARQUET_TEST_DATA =
      if doInstallCheck then "${parquet-testing}/data" else null;
    installCheckInputs = [ perl which ];
    installCheckPhase = (stdenv.lib.optionalString stdenv.isDarwin ''
      for f in release/*test; do
  