python312Packages.borb: fix build failure on darwin (#355819)

{

  lib,

  stdenv,

  buildPythonPackage,

  cryptography,

  fetchFromGitHub,

    hash = "sha256-eVxpcYL3ZgwidkSt6tUav3Bkne4lo1QCshdUFqkA0wI=";

  };

  # ModuleNotFoundError: No module named '_decimal'

  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''

    grep -Rl 'from _decimal' tests/ | while read -r test_file; do

      substituteInPlace "$test_file" \

        --replace-fail 'from _decimal' 'from decimal'

    done

  '';

  build-system = [ setuptools ];

  dependencies = [