diff --git a/nixos-module.nix b/nixos-module.nix
index 0e045b9..43db303 100644
--- a/nixos-module.nix
+++ b/nixos-module.nix
@@ -59,6 +59,7 @@ in
   config = {
     users.users.${cfg.user} = {
       inherit (cfg) group;
+      isSystemUser = true;
     };
     users.groups.${cfg.group} = {};