diff --git a/systems/palatine-hill/configuration.nix b/systems/palatine-hill/configuration.nix
index fb65026..9133f6a 100644
--- a/systems/palatine-hill/configuration.nix
+++ b/systems/palatine-hill/configuration.nix
@@ -238,7 +238,7 @@ in
 
   nix.gc.options = "--delete-older-than 150d";
 
-  gc.options = "--delete-older-than 150d";
+  nix.gc.options = "--delete-older-than 150d";
 
   sops = {
     defaultSopsFile = ./secrets.yaml;