diff --git a/hosts/server/default.nix b/hosts/server/default.nix
index 264e4bd..dbdfeae 100644
--- a/hosts/server/default.nix
+++ b/hosts/server/default.nix
@@ -29,7 +29,7 @@ in {
     gc = {
       automatic = true;
       dates = "daily";
-      options = "--delete-older-than 4d";
+      options = lib.mkDefault "--delete-older-than 4d";
     };
   };
   imports = [