diff --git a/profiles/host_common.nix b/profiles/host_common.nix
index c20f5bf..36adb87 100644
--- a/profiles/host_common.nix
+++ b/profiles/host_common.nix
@@ -69,11 +69,13 @@
       dates = "weekly";
       options = "--delete-older-than 90d";
     };
-    autoOptimiseStore = true;
     extraOptions = ''
       show-trace = true                 # Enable --show-trace by default for nix
       builders-use-substitutes = true   # Set builders to use caches
     '';
+    settings = {
+      auto-optimise-store = true;
+    };
     trustedUsers = ["fiscalvelvetpoet"];
   };