ocamlPackages.ocaml_lwt: 3.3.0 -> 4.1.0

pkgs/development/ocaml-modules/lwt/4.x.nix

@@ -0,0 +1,35 @@
+{ stdenv, fetchzip, pkgconfig, ncurses, libev, dune
+, ocaml, findlib, cppo
+, ocaml-migrate-parsetree, ppx_tools_versioned, result
+}:
+
+let inherit (stdenv.lib) optional versionAtLeast; in
+
+stdenv.mkDerivation rec {
+  version = "4.1.0";
+  name = "ocaml${ocaml.version}-lwt-${version}";
+
+  src = fetchzip {
+    url = "https://github.com/ocsigen/lwt/archive/${version}.tar.gz";
+    sha256 = "16wnc61kfj54z4q8sn9f5iik37pswz328hcz3z6rkza3kh3s6wmm";
+  };
+
+  nativeBuildInputs = [ pkgconfig ];
+  buildInputs = [ ocaml findlib dune cppo
+    ocaml-migrate-parsetree ppx_tools_versioned
+  ] ++ optional (!versionAtLeast ocaml.version "4.07") ncurses;
+  propagatedBuildInputs = [ libev result ];
+
+  configurePhase = "ocaml src/util/configure.ml -use-libev true";
+  buildPhase = "jbuilder build -p lwt";
+  inherit (dune) installPhase;
+
+  meta = {
+    homepage = "https://ocsigen.org/lwt/";
+    description = "A cooperative threads library for OCaml";
+    maintainers = [ stdenv.lib.maintainers.vbgl ];
+    license = stdenv.lib.licenses.lgpl21;
+    inherit (ocaml.meta) platforms;
+  };
+}
+