{ stdenv, lib, fetchFromGitLab, ocaml, findlib, camlp4, config-file, lablgtk, xmlm }:

if lib.versionOlder ocaml.version "4.02"
|| lib.versionAtLeast ocaml.version "4.13"
then throw "lablgtk-extras is not available for OCaml ${ocaml.version}"
else

stdenv.mkDerivation rec {
  version = "1.6";
  pname = "ocaml${ocaml.version}-lablgtk-extras";
  src = fetchFromGitLab {
    domain = "framagit.org";
    owner = "zoggy";
    repo = "lablgtk-extras";
    rev = "release-${version}";
    sha256 = "1bbdp5j18s582mmyd7qiaq1p08g2ag4gl7x65pmzahbhg719hjda";
  };

  nativeBuildInputs = [ ocaml findlib camlp4 ];
  propagatedBuildInputs = [ config-file lablgtk xmlm ];

  createFindlibDestdir = true;

  meta = {
    inherit (ocaml.meta) platforms;
    maintainers = with lib.maintainers; [ vbgl ];
    homepage = "https://framagit.org/zoggy/lablgtk-extras/";
    description = "A collection of libraries and modules useful when developing OCaml/LablGtk2 applications";
    license = lib.licenses.lgpl2Plus;
  };
}