diff --git a/modules/timers/rooms.nix b/modules/timers/rooms.nix
index a6317aa..7f02322 100644
--- a/modules/timers/rooms.nix
+++ b/modules/timers/rooms.nix
@@ -14,10 +14,10 @@ in {
   };
 
   config = mkIf cfg.enable {
-    environment.packages = with pkgs; [
+    environment.systemPackages = with pkgs; [
       jdk
     ];
-    
+
     systemd.timers."rooms" = {
       wantedBy = ["timers.target"];
       timerConfig = {