From 33eff1646629b977e373ef4d486c6862974080a6 Mon Sep 17 00:00:00 2001
From: Vincent Laporte <Vincent.Laporte@gmail.com>
Date: Tue, 28 Mar 2023 08:57:38 +0200
Subject: [PATCH] ocamlPackages.vchan: use Dune 3

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

diff --git a/pkgs/development/ocaml-modules/vchan/default.nix b/pkgs/development/ocaml-modules/vchan/default.nix
index 872d11606ff..e727c866766 100644
--- a/pkgs/development/ocaml-modules/vchan/default.nix
+++ b/pkgs/development/ocaml-modules/vchan/default.nix
@@ -9,10 +9,11 @@ buildDunePackage rec {
   version = "6.0.1";
 
   minimalOCamlVersion = "4.08";
+  duneVersion = "3";
 
   src = fetchurl {
     url = "https://github.com/mirage/ocaml-vchan/releases/download/v${version}/vchan-${version}.tbz";
-    sha256 = "sha256-5E7dITMVirYoxUkp8ZamRAolyhA6avXGJNAioxeBuV0=";
+    hash = "sha256-5E7dITMVirYoxUkp8ZamRAolyhA6avXGJNAioxeBuV0=";
   };
 
   propagatedBuildInputs = [