LightDM
Appearance
LightDM is a lightweight, cross-desktop display manager. It is built on X11 but is capable of launching Wayland sessions.
Installation
LightDM may be installed and set to start automatically by enabling it in your configuration file.
❄︎ /etc/nixos/configuration.nix
services.xserver.displayManager.lightdm.enable = true;
Configuration
Additional options may be found under services.xserver.displayManager.lightdm.