fix when overrides for device types gets merged

hosts/default.nix

@@ -170,10 +170,11 @@ let
         lib.mapAttrsToList (
           deviceKey: deviceConfig:
           let
-            usePrefix = deviceConfig.ugaif.host.useHostPrefix or true;
-            hostName = mkHostName prefix deviceKey usePrefix;
             # Merge: base config -> overrides -> device-specific config
             mergedConfig = lib.recursiveUpdate (lib.recursiveUpdate baseConfig overrides) deviceConfig;
+            # Check useHostPrefix from the merged config
+            usePrefix = mergedConfig.ugaif.host.useHostPrefix or true;
+            hostName = mkHostName prefix deviceKey usePrefix;
           in
           {
             name = hostName;

inventory.nix

@@ -86,9 +86,11 @@
   # Creates: nix-builder (without lxc prefix)
   nix-lxc = {
     devices = {
-      "nix-builder" = {
-        ugaif.host.useHostPrefix = false;
-      };
+      "nix-builder" = { };
+      "usda-dash" = { };
+    };
+    overrides = {
+      ugaif.host.useHostPrefix = false;
     };
   };