diff --git a/nixos/modules/system/boot/systemd/user.nix b/nixos/modules/system/boot/systemd/user.nix
index 3e099ba30f2c..966b8ce3f816 100644
--- a/nixos/modules/system/boot/systemd/user.nix
+++ b/nixos/modules/system/boot/systemd/user.nix
@@ -109,6 +109,7 @@ in {
       description = ''
         Additional units shipped with systemd that shall be enabled for per-user systemd instances.
       '';
+      internal = true;
     };
   };