diff --git a/pkgs/development/ocaml-modules/ocplib-json-typed/bson.nix b/pkgs/development/ocaml-modules/ocplib-json-typed/bson.nix
index 350c31a3819d..f95a25d25f2e 100644
--- a/pkgs/development/ocaml-modules/ocplib-json-typed/bson.nix
+++ b/pkgs/development/ocaml-modules/ocplib-json-typed/bson.nix
@@ -2,7 +2,7 @@
 
 buildDunePackage {
   pname = "ocplib-json-typed-bson";
-  inherit (ocplib-json-typed) version src;
+  inherit (ocplib-json-typed) version useDune2 src;
 
   propagatedBuildInputs = [ ocplib-json-typed ocplib-endian ];
 
diff --git a/pkgs/development/ocaml-modules/ocplib-json-typed/default.nix b/pkgs/development/ocaml-modules/ocplib-json-typed/default.nix
index 6a1b906d7f2b..6a3de6292d8c 100644
--- a/pkgs/development/ocaml-modules/ocplib-json-typed/default.nix
+++ b/pkgs/development/ocaml-modules/ocplib-json-typed/default.nix
@@ -3,6 +3,7 @@
 buildDunePackage rec {
 	pname = "ocplib-json-typed";
 	version = "0.7.1";
+	useDune2 = true;
 	src = fetchFromGitHub {
 		owner = "OCamlPro";
 		repo = "ocplib-json-typed";