nixpkgs/pkgs/development/ocaml-modules/cstruct/ppx.nix

{ lib, buildDunePackage, cstruct, sexplib, ppxlib, stdlib-shims
, ounit, cppo, ppx_sexp_conv, cstruct-unix, cstruct-sexp
}:

if !lib.versionAtLeast (cstruct.version or "1") "3"
then cstruct
else

buildDunePackage {
  pname = "ppx_cstruct";
  inherit (cstruct) version src useDune2 meta;

  minimalOCamlVersion = "4.08";

  propagatedBuildInputs = [ cstruct ppxlib sexplib stdlib-shims ];

  doCheck = true;
  checkInputs = [ ounit cppo ppx_sexp_conv cstruct-sexp cstruct-unix ];
}