From 25947abcf180ba4ec3cfd558b49fa8fd0817b826 Mon Sep 17 00:00:00 2001
From: Vincent Laporte <Vincent.Laporte@gmail.com>
Date: Sun, 28 Feb 2021 21:57:17 +0100
Subject: [PATCH] ocamlPackages.ppx_derivers: use Dune 2

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

diff --git a/pkgs/development/ocaml-modules/ppx_derivers/default.nix b/pkgs/development/ocaml-modules/ppx_derivers/default.nix
index 3d4675ed90b9..84dda38846fe 100644
--- a/pkgs/development/ocaml-modules/ppx_derivers/default.nix
+++ b/pkgs/development/ocaml-modules/ppx_derivers/default.nix
@@ -1,9 +1,11 @@
-{ lib, fetchFromGitHub, buildDunePackage }:
+{ lib, fetchFromGitHub, buildDunePackage, ocaml }:
 
 buildDunePackage rec {
   pname = "ppx_derivers";
   version = "1.2.1";
 
+  useDune2 = lib.versionAtLeast ocaml.version "4.08";
+
   minimumOCamlVersion = "4.02";
 
   src = fetchFromGitHub {