diff --git a/pkgs/development/ocaml-modules/spelll/default.nix b/pkgs/development/ocaml-modules/spelll/default.nix
index 5901dcb896ac..9df0779e53a3 100644
--- a/pkgs/development/ocaml-modules/spelll/default.nix
+++ b/pkgs/development/ocaml-modules/spelll/default.nix
@@ -6,6 +6,8 @@ buildDunePackage rec {
   pname = "spelll";
   version = "0.3";
 
+  useDune2 = true;
+
   src = fetchFromGitHub {
     owner = "c-cube";
     repo = pname;