From 6f204e9c42d10011be7fcad106d408b66c3e0a50 Mon Sep 17 00:00:00 2001
From: Vincent Laporte <Vincent.Laporte@gmail.com>
Date: Wed, 3 Mar 2021 08:25:06 +0100
Subject: [PATCH] ocamlPackages.integers: use Dune 2

---
 pkgs/development/ocaml-modules/integers/default.nix | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/ocaml-modules/integers/default.nix b/pkgs/development/ocaml-modules/integers/default.nix
index ad6f1f9f813..97443bf5706 100644
--- a/pkgs/development/ocaml-modules/integers/default.nix
+++ b/pkgs/development/ocaml-modules/integers/default.nix
@@ -1,9 +1,11 @@
-{ lib, fetchzip, buildDunePackage }:
+{ lib, fetchzip, buildDunePackage, ocaml }:
 
 buildDunePackage rec {
   pname = "integers";
   version = "0.4.0";
 
+  useDune2 = lib.versionAtLeast ocaml.version "4.08";
+
   src = fetchzip {
     url = "https://github.com/ocamllabs/ocaml-integers/archive/${version}.tar.gz";
     sha256 = "0yp3ab0ph7mp5741g7333x4nx8djjvxzpnv3zvsndyzcycspn9dd";