{
  pkgs,
  lib,
  mainUser,
  ...
}: {
  services.greetd = {
    enable = true;
    restart = false;
    settings = let session = {
        command = "niri-session";
        user = "${mainUser}";
      }; in {
      default_session = session;
      initial_session = session;
    };
  };
  programs.niri = {
    enable = true;
    package = pkgs.niri-unstable;
  };
}