From 685b423e45a7fa6500d53681e279ad9964977717 Mon Sep 17 00:00:00 2001
From: Weijia Wang <9713184+wegank@users.noreply.github.com>
Date: Wed, 19 Apr 2023 15:44:46 +0300
Subject: [PATCH] ocamlPackages.lwt: fix for OCaml >= 5

---
 pkgs/development/ocaml-modules/lwt/default.nix | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/ocaml-modules/lwt/default.nix b/pkgs/development/ocaml-modules/lwt/default.nix
index 8004cfcd4bb..cf631fd08e4 100644
--- a/pkgs/development/ocaml-modules/lwt/default.nix
+++ b/pkgs/development/ocaml-modules/lwt/default.nix
@@ -1,5 +1,5 @@
 { lib, fetchFromGitHub, libev, buildDunePackage
-, cppo, dune-configurator, ocplib-endian
+, ocaml, cppo, dune-configurator, ocplib-endian
 }:
 
 buildDunePackage rec {
@@ -15,6 +15,11 @@ buildDunePackage rec {
     sha256 = "sha256-XstKs0tMwliCyXnP0Vzi5WC27HKJGnATUYtbbQmH1TE=";
   };
 
+  postPatch = lib.optionalString (lib.versionAtLeast ocaml.version "5.0") ''
+    substituteInPlace src/unix/dune \
+      --replace "libraries bigarray lwt" "libraries lwt"
+  '';
+
   nativeBuildInputs = [ cppo ];
   buildInputs = [ dune-configurator ];
   propagatedBuildInputs = [ libev ocplib-endian ];