From cdfa6c7e80456bee0a403f8dbbaaa0227135f920 Mon Sep 17 00:00:00 2001
From: Vincent Laporte <Vincent.Laporte@gmail.com>
Date: Tue, 2 May 2023 06:08:08 +0200
Subject: [PATCH] ocamlPackages.ppx_deriving: use Dune 3

---
 pkgs/development/ocaml-modules/ppx_deriving/default.nix | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/pkgs/development/ocaml-modules/ppx_deriving/default.nix b/pkgs/development/ocaml-modules/ppx_deriving/default.nix
index e1c31c3ec28e..b911b3da1886 100644
--- a/pkgs/development/ocaml-modules/ppx_deriving/default.nix
+++ b/pkgs/development/ocaml-modules/ppx_deriving/default.nix
@@ -2,6 +2,7 @@
 , fetchurl
 , buildDunePackage
 , ocaml
+, findlib
 , cppo
 , ppxlib
 , ppx_derivers
@@ -32,7 +33,7 @@ buildDunePackage rec {
   pname = "ppx_deriving";
   inherit (params) version;
 
-  useDune2 = true;
+  duneVersion = "3";
 
   src = fetchurl {
     url = "https://github.com/ocaml-ppx/ppx_deriving/releases/download/v${version}/ppx_deriving-v${version}.tbz";
@@ -42,7 +43,7 @@ buildDunePackage rec {
   strictDeps = true;
 
   nativeBuildInputs = [ cppo ];
-  buildInputs = [ ppxlib ];
+  buildInputs = [ findlib ppxlib ];
   propagatedBuildInputs = [
     (if params.useOMP2
     then ocaml-migrate-parsetree-2