diff --git a/pkgs/development/ocaml-modules/bigarray-compat/default.nix b/pkgs/development/ocaml-modules/bigarray-compat/default.nix
index 487249ce5ae5..83c35edcc41d 100644
--- a/pkgs/development/ocaml-modules/bigarray-compat/default.nix
+++ b/pkgs/development/ocaml-modules/bigarray-compat/default.nix
@@ -6,6 +6,8 @@ buildDunePackage rec {
 
   useDune2 = true;
 
+  minimalOCamlVersion = "4.03";
+
   src = fetchFromGitHub {
     owner = "mirage";
     repo = pname;
diff --git a/pkgs/development/tools/ocaml/dune/2.nix b/pkgs/development/tools/ocaml/dune/2.nix
index f80fabedebe4..c55aae7878ef 100644
--- a/pkgs/development/tools/ocaml/dune/2.nix
+++ b/pkgs/development/tools/ocaml/dune/2.nix
@@ -6,11 +6,11 @@ else
 
 stdenv.mkDerivation rec {
   pname = "dune";
-  version = "2.9.1";
+  version = "2.9.2";
 
   src = fetchurl {
-    url = "https://github.com/ocaml/dune/releases/download/${version}/dune-${version}.tbz";
-    sha256 = "09lzq04b642iy0ljp59p32lgk3q8iphjh8fkdp69q29l5frgwx5k";
+    url = "https://github.com/ocaml/dune/releases/download/${version}/dune-site-${version}.tbz";
+    sha256 = "sha256-uOfMUH+5eLRfb9yDnysyAdLB5hHkqOlyyMjP2FIudEc=";
   };
 
   nativeBuildInputs = [ ocaml findlib ];
diff --git a/pkgs/development/tools/ocaml/js_of_ocaml/ocamlbuild.nix b/pkgs/development/tools/ocaml/js_of_ocaml/ocamlbuild.nix
index 6abb1ac1b3ae..3375e5ac5a0f 100644
--- a/pkgs/development/tools/ocaml/js_of_ocaml/ocamlbuild.nix
+++ b/pkgs/development/tools/ocaml/js_of_ocaml/ocamlbuild.nix
@@ -7,5 +7,7 @@ buildDunePackage {
 
   inherit (js_of_ocaml-compiler) version src meta useDune2;
 
+  minimalOCamlVersion = "4.03";
+
   propagatedBuildInputs = [ ocamlbuild ];
 }