diff --git a/pkgs/development/ocaml-modules/janestreet/0.12.nix b/pkgs/development/ocaml-modules/janestreet/0.12.nix
index ec2f793caf91..c3b4b0c6d705 100644
--- a/pkgs/development/ocaml-modules/janestreet/0.12.nix
+++ b/pkgs/development/ocaml-modules/janestreet/0.12.nix
@@ -24,7 +24,7 @@ with self;
     hash = "0gl89zpgsf3n30nb6v5cns27g2bfg4rf3s2427gqvwbkr5gcf7ri";
     meta.description = "Full standard library replacement for OCaml";
     propagatedBuildInputs = [ sexplib0 ];
-    buildInputs = [ dune-configurator ];
+    buildInputs = [ dune_1 ];
   };
 
   stdio = janePackage {
@@ -208,7 +208,7 @@ with self;
     pname = "jst-config";
     hash = "0yxcz13vda1mdh9ah7qqxwfxpcqang5sgdssd8721rszbwqqaw93";
     meta.description = "Compile-time configuration for Jane Street libraries";
-    buildInputs = [ ppx_assert ];
+    buildInputs = [ dune_1 ppx_assert ];
   };
 
   ppx_optcomp = janePackage {
diff --git a/pkgs/development/ocaml-modules/janestreet/janePackage_0_12.nix b/pkgs/development/ocaml-modules/janestreet/janePackage_0_12.nix
index ebde7b240ef7..3d280a509acc 100644
--- a/pkgs/development/ocaml-modules/janestreet/janePackage_0_12.nix
+++ b/pkgs/development/ocaml-modules/janestreet/janePackage_0_12.nix
@@ -1,13 +1,11 @@
 { lib, fetchFromGitHub, buildDunePackage, defaultVersion ? "0.12.0" }:
 
-{ pname, version ? defaultVersion, hash, buildInputs ? [], ...}@args:
+{ pname, version ? defaultVersion, hash, ...}@args:
 
 buildDunePackage (args // {
-  inherit version buildInputs;
+  inherit version;
 
-  minimumOCamlVersion = "4.07";
-
-  useDune2 = true;
+  minimalOCamlVersion = "4.07";
 
   src = fetchFromGitHub {
     owner = "janestreet";