diff --git a/hosts/containers/hydra/default.nix b/hosts/containers/hydra/default.nix
index 88b50b68..00a752c5 100644
--- a/hosts/containers/hydra/default.nix
+++ b/hosts/containers/hydra/default.nix
@@ -28,7 +28,7 @@
     buildCores = 20;
     gc = {
       automatic = true;
-      dates = "06:00";
+      dates = lib.mkForce "06:00";
       options = "--delete-older-than 14d";
     };
     sshServe.enable = true;