diff --git a/pkgs/development/ocaml-modules/dispatch/default.nix b/pkgs/development/ocaml-modules/dispatch/default.nix
index 587f5a792dc..958574f3d97 100644
--- a/pkgs/development/ocaml-modules/dispatch/default.nix
+++ b/pkgs/development/ocaml-modules/dispatch/default.nix
@@ -4,7 +4,7 @@ buildDunePackage rec {
   pname = "dispatch";
   version = "0.5.0";
 
-  useDune2 = true;
+  duneVersion = "3";
 
   src = fetchFromGitHub {
     owner = "inhabitedtype";