diff --git a/pkgs/top-level/release.nix b/pkgs/top-level/release.nix
index 3f6a5ceeb17..67a320cef8a 100644
--- a/pkgs/top-level/release.nix
+++ b/pkgs/top-level/release.nix
@@ -596,4 +596,6 @@ in {
     xset = linux;
   };
 
-} ))
+} 
+# Just a test to check for Hydra Nix version..
+// (if builtins.tryEval then {} else {hello=[];}) ))