diff --git a/roles/common/configuration.nix b/roles/common/configuration.nix
index 833e241..f51dacc 100755
--- a/roles/common/configuration.nix
+++ b/roles/common/configuration.nix
@@ -178,6 +178,9 @@
     stateVersion = "25.05";
     # Nix on nixos 23.05 does not have dirtyRev
     configurationRevision = flakeSelf.sourceInfo.rev or flakeSelf.sourceInfo.dirtyRev or "dirty";
-    nixos.variant_id = lib.strings.toLower config.networking.hostName;
+    nixos.variant_id = lib.mkDefault (lib.strings.toLower config.networking.hostName);
+  };
+  image.modules.iso = {
+    system.nixos.variant_id = "${lib.strings.toLower config.networking.hostName}-iso";
   };
 }