diff --git a/modules/system/activation/no-clone.nix b/modules/system/activation/no-clone.nix
index 74df217a01a..d28183d2dc4 100644
--- a/modules/system/activation/no-clone.nix
+++ b/modules/system/activation/no-clone.nix
@@ -5,7 +5,7 @@
 with pkgs.lib;
 
 {
-  boot.loader.grub.device = mkOverrideTemplate 0 {} "";
+  boot.loader.grub.device = mkOverrideTemplate 0 {} "nodev";
   # undefined the obsolete name of the previous option.
   boot.grubDevice = mkOverrideTemplate 0 {} pkgs.lib.mkNotdef;
   nesting.children = mkOverrideTemplate 0 {} [];