1 files changed, 39 insertions, 0 deletions
diff --git a/pkgs/development/ocaml-modules/lwt/3.x.nix b/pkgs/development/ocaml-modules/lwt/3.x.nix
new file mode 100644
index 000000000000..c8371feb9052
--- /dev/null
+++ b/pkgs/development/ocaml-modules/lwt/3.x.nix
@@ -0,0 +1,39 @@
+{ stdenv, fetchzip, pkgconfig, ncurses, libev, dune
+, ocaml, findlib, cppo
+, ocaml-migrate-parsetree, ppx_tools_versioned, result
+, withP4 ? true
+, camlp4 ? null
+}:
+
+stdenv.mkDerivation rec {
+  version = "3.3.0";
+  name = "ocaml${ocaml.version}-lwt-${version}";
+
+  src = fetchzip {
+    url = "https://github.com/ocsigen/lwt/archive/${version}.tar.gz";
+    sha256 = "0n87hcyl4svy0risj439wyfq6bl77qxq3nraqgdr1qbz5lskbq2j";
+  };
+
+  preConfigure = ''
+    ocaml src/util/configure.ml -use-libev true -use-camlp4 ${if withP4 then "true" else "false"}
+  '';
+
+  nativeBuildInputs = [ pkgconfig ];
+  buildInputs = [ ncurses ocaml findlib dune cppo
+    ocaml-migrate-parsetree ppx_tools_versioned ]
+  ++ stdenv.lib.optional withP4 camlp4;
+  propagatedBuildInputs = [ libev result ];
+
+  installPhase = ''
+    ocaml src/util/install_filter.ml
+    ${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;
+  };
+}