diff --git a/hosts/noisebell-do/configuration.nix b/hosts/noisebell-do/configuration.nix
index 37c4bb3..43a3aa2 100644
--- a/hosts/noisebell-do/configuration.nix
+++ b/hosts/noisebell-do/configuration.nix
@@ -67,6 +67,7 @@
   boot.loader.grub = {
     enable = true;
     devices = lib.mkForce [ "/dev/vda" ];
+    configurationLimit = 1;
   };
 
   fileSystems."/" = {
@@ -182,7 +183,12 @@
   nix.gc = {
     automatic = true;
     dates = "daily";
-    options = "--delete-older-than 7d";
+    options = "--delete-old";
+  };
+
+  nix.optimise = {
+    automatic = true;
+    dates = "daily";
   };
 
   services.journald.extraConfig = ''
diff --git a/hosts/noisebell-do/observability.nix b/hosts/noisebell-do/observability.nix
index c529566..7b27a5d 100644
--- a/hosts/noisebell-do/observability.nix
+++ b/hosts/noisebell-do/observability.nix
@@ -751,12 +751,16 @@ in
       common = {
         path_prefix = "/var/lib/loki";
         replication_factor = 1;
-        ring.kvstore.store = "inmemory";
+        ring = {
+          instance_addr = "127.0.0.1";
+          kvstore.store = "inmemory";
+        };
         storage.filesystem = {
           chunks_directory = "/var/lib/loki/chunks";
           rules_directory = "/var/lib/loki/rules";
         };
       };
+      frontend.address = "127.0.0.1";
       schema_config.configs = [
         {
           from = "2024-01-01";