{ stdenv, fetchzip, which, cryptopp, ocaml, findlib, ocaml_react, ocaml_ssl, libev, pkgconfig, ncurses, ocaml_oasis, ocaml_text, glib, camlp4, ppx_tools }: let inherit (stdenv.lib) optional getVersion versionAtLeast; in stdenv.mkDerivation rec { name = "ocaml-lwt-${version}"; version = "2.5.2"; src = fetchzip { url = "https://github.com/ocsigen/lwt/archive/${version}.tar.gz"; sha256 = "0gmhm282r8yi0gwcv0g2s7qchkfjmhqbqf4j9frlyv665ink9kxl"; }; buildInputs = [ ocaml_oasis pkgconfig which cryptopp ocaml findlib glib ncurses camlp4 ppx_tools ]; propagatedBuildInputs = [ ocaml_react ocaml_ssl ocaml_text libev ]; configureFlags = [ "--enable-glib" "--enable-ssl" "--enable-react" "--enable-camlp4"] ++ [ (if versionAtLeast ocaml.version "4.02" then "--enable-ppx" else "--disable-ppx") ]; createFindlibDestdir = true; meta = with stdenv.lib; { homepage = http://ocsigen.org/lwt; description = "Lightweight thread library for Objective Caml"; license = licenses.lgpl21; platforms = ocaml.meta.platforms or []; maintainers = with maintainers; [ z77z vbgl gal_bolle ]; }; }