From 75fa489b3fbc30ae13d84bb535fb55ef9b533f69 Mon Sep 17 00:00:00 2001
From: Vincent Laporte <Vincent.Laporte@gmail.com>
Date: Thu, 2 Nov 2023 14:59:54 +0100
Subject: [PATCH] =?UTF-8?q?ocamlPackages.dum:=20fix=20build=20with=20OCaml?=
 =?UTF-8?q?=20=E2=89=A5=205.0?=
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---
 pkgs/development/ocaml-modules/dum/default.nix | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/pkgs/development/ocaml-modules/dum/default.nix b/pkgs/development/ocaml-modules/dum/default.nix
index 3faef36e8ec4..43584461af18 100644
--- a/pkgs/development/ocaml-modules/dum/default.nix
+++ b/pkgs/development/ocaml-modules/dum/default.nix
@@ -13,6 +13,12 @@ stdenv.mkDerivation rec {
     sha256 = "0yrxl97szjc0s2ghngs346x3y0xszx2chidgzxk93frjjpsr1mlr";
   };
 
+  postPatch = ''
+      substituteInPlace "dum.ml" \
+      --replace "Lazy.lazy_is_val" "Lazy.is_val" \
+      --replace "Obj.final_tag" "Obj.custom_tag"
+  '';
+
   nativeBuildInputs = [ ocaml findlib ];
   propagatedBuildInputs = [ easy-format ];