diff --git a/pkgs/by-name/xs/xss-lock/package.nix b/pkgs/by-name/xs/xss-lock/package.nix
index d01902021757..8b40b1fc105c 100644
--- a/pkgs/by-name/xs/xss-lock/package.nix
+++ b/pkgs/by-name/xs/xss-lock/package.nix
@@ -15,7 +15,7 @@
 
 stdenv.mkDerivation {
   pname = "xss-lock";
-  version = "unstable-2018-05-31";
+  version = "0.3.0-unstable-2018-05-31";
 
   src = fetchFromGitHub {
     owner = "xdbob";