Show Missing Users in Gnome Login Screen
When you install and configure the NixOS with Gnome from minimal image, it is possible that you will not see the existing user(s) in the login screen. It expects you to type your username and password. I know it is not a big deal. But, it is annoying. This is because the user you configured in your configuration.nix file, somehow, is identified as a system user. So, it is not shown in the login screen....