From 7bbbb27a83ec26d1cf1c05ad2497a130f5df1e04 Mon Sep 17 00:00:00 2001
From: Vincent Laporte <Vincent.Laporte@gmail.com>
Date: Mon, 10 Apr 2023 14:15:00 +0200
Subject: [PATCH] ocamlPackages.duff: use Dune 3

---
 pkgs/development/ocaml-modules/duff/default.nix | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/pkgs/development/ocaml-modules/duff/default.nix b/pkgs/development/ocaml-modules/duff/default.nix
index 583949cf1da..99261a5b324 100644
--- a/pkgs/development/ocaml-modules/duff/default.nix
+++ b/pkgs/development/ocaml-modules/duff/default.nix
@@ -1,7 +1,6 @@
 { lib
 , fetchurl
 , buildDunePackage
-, ocaml
 , fmt
 , alcotest
 , hxd
@@ -13,6 +12,9 @@ buildDunePackage rec {
   pname = "duff";
   version = "0.5";
 
+  minimalOCamlVersion = "4.08";
+  duneVersion = "3";
+
   src = fetchurl {
     url = "https://github.com/mirage/duff/releases/download/v${version}/duff-${version}.tbz";
     sha256 = "sha256-0eqpfPWNOHYjkcjXRnZUTUFF0/L9E+TNoOqKCETN5hI=";
@@ -20,7 +22,7 @@ buildDunePackage rec {
 
   propagatedBuildInputs = [ fmt ];
 
-  doCheck = lib.versionAtLeast ocaml.version "4.08";
+  doCheck = true;
   checkInputs = [
     alcotest
     crowbar