diff --git a/packaging/nix/umu-launcher.nix b/packaging/nix/umu-launcher.nix
index 21b2e6a0..879de7f3 100644
--- a/packaging/nix/umu-launcher.nix
+++ b/packaging/nix/umu-launcher.nix
@@ -1,8 +1,8 @@
-{pyth1 ,python3Packages , umu-launcher, pkgs, ...}:
+{pyth1 ,python3Packages , umu-launcher, pkgs,version ? "1.1.3", ...}:
 python3Packages.buildPythonPackage {
   name = "umu-launcher";
   #version = "1.1.3-${umu-launcher.shortRev}";
-  version = "1.1.3";
+  version = "${version}";
   src = umu-launcher;
   pyproject = false;
   depsBuildBuild = [