diff --git a/pkgs/development/ocaml-modules/janestreet/janePackage.nix b/pkgs/development/ocaml-modules/janestreet/janePackage.nix
index 9552268abc2e..f4cef99046ad 100644
--- a/pkgs/development/ocaml-modules/janestreet/janePackage.nix
+++ b/pkgs/development/ocaml-modules/janestreet/janePackage.nix
@@ -5,7 +5,7 @@
 buildDunePackage (args // {
   inherit version buildInputs;
 
-  useDune2 = false;
+  duneVersion = "1";
 
   minimalOCamlVersion = "4.04";
 
diff --git a/pkgs/development/ocaml-modules/janestreet/janePackage_0_12.nix b/pkgs/development/ocaml-modules/janestreet/janePackage_0_12.nix
index d61f1b6d41c2..5ab455ddff3e 100644
--- a/pkgs/development/ocaml-modules/janestreet/janePackage_0_12.nix
+++ b/pkgs/development/ocaml-modules/janestreet/janePackage_0_12.nix
@@ -5,7 +5,7 @@
 buildDunePackage (args // {
   inherit version;
 
-  useDune2 = false;
+  duneVersion = "1";
 
   minimalOCamlVersion = "4.07";