diff --git a/pkgs/development/ocaml-modules/ocplib-endian/default.nix b/pkgs/development/ocaml-modules/ocplib-endian/default.nix
index 5cd42884d5b..1e657fce8dd 100644
--- a/pkgs/development/ocaml-modules/ocplib-endian/default.nix
+++ b/pkgs/development/ocaml-modules/ocplib-endian/default.nix
@@ -11,7 +11,7 @@ buildDunePackage rec {
     sha256 = "sha256-THTlhOfXAPaqTt1qBkht+D67bw6M175QLvXoUMgjks4=";
   };
 
-  useDune2 = true;
+  minimalOCamlVersion = "4.03";
 
   nativeBuildInputs = [ cppo ];