diff --git a/modules/k8s.nix b/modules/k8s.nix
index e8a52dd..4cea262 100644
--- a/modules/k8s.nix
+++ b/modules/k8s.nix
@@ -74,6 +74,7 @@ let
           };
         }));
         default = [];
+        apply = unique;
       };
 
       types = mkOption {