diff --git a/nixos/modules/profiles/installation-device.nix b/nixos/modules/profiles/installation-device.nix
index 8e0e1ffb0c6..ff4a23a18d0 100644
--- a/nixos/modules/profiles/installation-device.nix
+++ b/nixos/modules/profiles/installation-device.nix
@@ -31,8 +31,8 @@ with lib;
     #services.rogue.enable = true;
 
     # Disable some other stuff we don't need.
-    security.sudo.enable = false;
-    services.udisks2.enable = false;
+    security.sudo.enable = mkDefault false;
+    services.udisks2.enable = mkDefault false;
 
     # Automatically log in at the virtual consoles.
     services.mingetty.autologinUser = "root";