{ lib, buildDunePackage, ocaml, alcotest, cstruct, sexplib }: if lib.versionOlder (cstruct.version or "1") "3" then cstruct else buildDunePackage rec { pname = "cstruct-sexp"; inherit (cstruct) version src useDune2 meta; minimumOCamlVersion = "4.03"; # alcotest is only available on OCaml >= 4.05 due to fmt doCheck = lib.versionAtLeast ocaml.version "4.05"; checkInputs = [ alcotest ]; propagatedBuildInputs = [ cstruct sexplib ]; }