From 6ab83d22558860198aaa79fb544b92b58ff913d0 Mon Sep 17 00:00:00 2001
From: Vincent Laporte <Vincent.Laporte@gmail.com>
Date: Mon, 10 Apr 2023 14:14:37 +0200
Subject: [PATCH] ocamlPackages.ppx_deriving_cmdliner: use Dune 3

---
 pkgs/development/ocaml-modules/ppx_deriving_cmdliner/default.nix | 1 +
 1 file changed, 1 insertion(+)

diff --git a/pkgs/development/ocaml-modules/ppx_deriving_cmdliner/default.nix b/pkgs/development/ocaml-modules/ppx_deriving_cmdliner/default.nix
index 5bf70a05650..f5d769efcfd 100644
--- a/pkgs/development/ocaml-modules/ppx_deriving_cmdliner/default.nix
+++ b/pkgs/development/ocaml-modules/ppx_deriving_cmdliner/default.nix
@@ -14,6 +14,7 @@ buildDunePackage rec {
   version = "0.6.1";
 
   minimalOCamlVersion = "4.11";
+  duneVersion = "3";
 
   src = fetchFromGitHub {
     owner = "hammerlab";