diff --git a/pkgs/development/ocaml-modules/xtmpl/default.nix b/pkgs/development/ocaml-modules/xtmpl/default.nix
index 6b4771fe1ff4..47e153e53c2d 100644
--- a/pkgs/development/ocaml-modules/xtmpl/default.nix
+++ b/pkgs/development/ocaml-modules/xtmpl/default.nix
@@ -3,7 +3,7 @@
 buildDunePackage rec {
   pname = "xtmpl";
   version = "0.19.0";
-  useDune2 = true;
+  duneVersion = "3";
   src = fetchFromGitLab {
     domain = "framagit.org";
     owner = "zoggy";
diff --git a/pkgs/development/ocaml-modules/xtmpl/ppx.nix b/pkgs/development/ocaml-modules/xtmpl/ppx.nix
index b6f5bd65000f..0e23cdc48f70 100644
--- a/pkgs/development/ocaml-modules/xtmpl/ppx.nix
+++ b/pkgs/development/ocaml-modules/xtmpl/ppx.nix
@@ -3,8 +3,9 @@
 buildDunePackage {
   pname = "xtmpl_ppx";
   minimalOCamlVersion = "4.11";
+  duneVersion = "3";
 
-  inherit (xtmpl) src version useDune2;
+  inherit (xtmpl) src version;
 
   buildInputs = [ ppxlib xtmpl ];