diff --git a/pkgs/development/ocaml-modules/ocamlformat-rpc-lib/default.nix b/pkgs/development/ocaml-modules/ocamlformat-rpc-lib/default.nix
index e3582cbed1d1..81328dc78df6 100644
--- a/pkgs/development/ocaml-modules/ocamlformat-rpc-lib/default.nix
+++ b/pkgs/development/ocaml-modules/ocamlformat-rpc-lib/default.nix
@@ -21,8 +21,8 @@ buildDunePackage rec {
     inherit (source) sha256;
   };
 
-  minimumOCamlVersion = "4.08";
-  useDune2 = true;
+  minimalOCamlVersion = "4.08";
+  duneVersion = "3";
 
   propagatedBuildInputs = [ csexp sexplib0 ];