diff --git a/modules/nixos/environment/locale.nix b/modules/nixos/environment/locale.nix
index 7edb11b8..4fc024a0 100644
--- a/modules/nixos/environment/locale.nix
+++ b/modules/nixos/environment/locale.nix
@@ -1,12 +1,12 @@
 { lib, config, ... }:
 {
   time = {
-    timeZone = if config.garden.profiles.server.enable then "UTC" else "Europe/London";
+    timeZone = lib.mkDefault (if config.garden.profiles.server.enable then "UTC" else "Europe/London");
     hardwareClockInLocalTime = true;
   };
 
   i18n = {
-    defaultLocale = "en_GB.UTF-8";
+    defaultLocale = lib.mkDefault "en_GB.UTF-8";
 
     extraLocales = lib.mkDefault [
       "en_US.UTF-8/UTF-8"