nixos-config/modules/lightdm/default.nix

{ config, lib, ... }:
with lib;
let
  cfg = config.eboskma.lightdm;
in
{
  options.eboskma.lightdm = {
    enable = mkEnableOption "lightdm";
  };

  config = mkIf cfg.enable {
    services.xserver = {
      enable = true;

      displayManager = {
        defaultSession = "none+i3";
        lightdm = {
          enable = true;
          greeters.gtk = {
            enable = true;
          };
        };
      };
    };
  };
}