diff --git a/nixos/profiles/services/hydra/_cache.nix b/nixos/profiles/services/hydra/_cache.nix
index 0e418d09..3fe87018 100644
--- a/nixos/profiles/services/hydra/_cache.nix
+++ b/nixos/profiles/services/hydra/_cache.nix
@@ -94,9 +94,12 @@ in
       ];
     };
     environment = lib.mkIf config.networking.fw-proxy.enable config.networking.fw-proxy.environment;
-    requiredBy = [ "hydra-update-gc-roots.service" ];
     after = [ "hydra-update-gc-roots.service" ];
   };
+  systemd.timers."gc-cache-li7g-com" = {
+    timerConfig.OnCalendar = "02:00";
+    wantedBy = [ "timers.target" ];
+  };
 
   sops.secrets."b2_cache_key_id" = {
     terraformOutput.enable = true;