diff --git a/common/gc.nix b/common/gc.nix
index 94476f7..62342bb 100644
--- a/common/gc.nix
+++ b/common/gc.nix
@@ -2,6 +2,6 @@
   nix.gc = {
     automatic = true;
     dates = "daily";
-    options = "--delete-older-than 1w";
+    options = "--delete-older-than 7d";
   };
 }