{ stdenv, fetchurl, ocaml, findlib, ocamlbuild, opam, xmlm, topkg }:

let
  pname = "uucd";
  webpage = "http://erratique.ch/software/${pname}";
in
stdenv.mkDerivation rec {
  name = "ocaml-${pname}-${version}";
  version = "4.0.0";

  src = fetchurl {
    url = "${webpage}/releases/${pname}-${version}.tbz";
    sha256 = "11cjfwa4wjhsyvzq4wl9z44xi28n49drz8nbfpx754vyfzwj3yc6";
  };

  buildInputs = [ ocaml findlib ocamlbuild opam topkg ];

  createFindlibDestdir = true;

  unpackCmd = "tar xjf $src";

  inherit (topkg) buildPhase installPhase;

  propagatedBuildInputs = [ xmlm ];

  meta = with stdenv.lib; {
    description = "An OCaml module to decode the data of the Unicode character database from its XML representation";
    homepage = "${webpage}";
    platforms = ocaml.meta.platforms or [];
    maintainers = [ maintainers.vbgl ];
    license = licenses.bsd3;
  };
}