diff --git a/common/default.nix b/common/default.nix
index e0368e5..422c695 100644
--- a/common/default.nix
+++ b/common/default.nix
@@ -17,7 +17,7 @@
     MaxRetentionSec=48h
   '';
   nix.gc.automatic = lib.mkDefault true;
-  nix.gc.options = lib.mkDefault "--delete-older-than 1w";
+  nix.gc.options = lib.mkDefault "--delete-older-than 7d";
   nix.settings.trusted-users = [ "root" "@wheel" ];
   nix.extraOptions = ''
     experimental-features = nix-command flakes