From 3df03f233a46cab99e34e79f52d62495f8522bcf Mon Sep 17 00:00:00 2001
From: Weijia Wang <9713184+wegank@users.noreply.github.com>
Date: Wed, 19 Apr 2023 15:44:54 +0300
Subject: [PATCH] ocamlPackages.ocplib-endian: fix for OCaml >= 5

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

diff --git a/pkgs/development/ocaml-modules/ocplib-endian/default.nix b/pkgs/development/ocaml-modules/ocplib-endian/default.nix
index 1e657fce8dd..285e8de84b3 100644
--- a/pkgs/development/ocaml-modules/ocplib-endian/default.nix
+++ b/pkgs/development/ocaml-modules/ocplib-endian/default.nix
@@ -1,4 +1,4 @@
-{ lib, buildDunePackage, fetchFromGitHub, cppo }:
+{ lib, buildDunePackage, fetchFromGitHub, ocaml, cppo }:
 
 buildDunePackage rec {
   version = "1.2";
@@ -11,6 +11,11 @@ buildDunePackage rec {
     sha256 = "sha256-THTlhOfXAPaqTt1qBkht+D67bw6M175QLvXoUMgjks4=";
   };
 
+  postPatch = lib.optionalString (lib.versionAtLeast ocaml.version "5.0") ''
+    substituteInPlace src/dune \
+      --replace "libraries ocplib_endian bigarray" "libraries ocplib_endian"
+  '';
+
   minimalOCamlVersion = "4.03";
 
   nativeBuildInputs = [ cppo ];