{
  lib,
  buildDunePackage,
  fetchpatch,
  ocaml,
  bitstring,
  ppxlib,
  ounit,
}:

if lib.versionOlder ppxlib.version "0.18.0" then
  throw "ppx_bitstring is not available with ppxlib-${ppxlib.version}"
else

  buildDunePackage {
    pname = "ppx_bitstring";
    inherit (bitstring) version src;

    patches = lib.optional (lib.versionAtLeast ppxlib.version "0.36") (fetchpatch {
      url = "https://github.com/xguerin/bitstring/commit/b42d4924cbb5ec5fd5309e6807852b63f456f35d.patch";
      hash = "sha256-wtpSnGOzIUTmB3LhyHGopecy7F/5SYFOwaR6eReV+6g=";
    });

    buildInputs = [
      bitstring
      ppxlib
    ];

    doCheck = lib.versionAtLeast ocaml.version "4.08";
    checkInputs = [ ounit ];

    meta = bitstring.meta // {
      description = "Bitstrings and bitstring matching for OCaml - PPX extension";
    };
  }