nix/config/Wayland.nix

{ config, pkgs, ... }:
let
  cfg = config.module.wayland;
in
{
  config = {
    programs.xwayland.enable = true;
    environment = {
      systemPackages = with pkgs; [
        wl-clipboard # CLI clipboard support.
      ];
      variables = {
        # Compatibility variables.
        ECORE_EVAS_ENGINE = "wayland_egl";
        ELM_ENGINE = "wayland_egl";
        GDK_BACKEND = "wayland";
        MOZ_ENABLE_WAYLAND = "1";
        QT_QPA_PLATFORM = "wayland-egl;wayland;xcb";
        QT_WAYLAND_DISABLE_WINDOWDECORATION = "1";
        SAL_USE_VCLPLUGIN = "gtk3";
        SDL_VIDEODRIVER = "wayland"; # NOTE: Can cause issues with games.
        _JAVA_AWT_WM_NONREPARENTING = "1";
      };
    };
  };
}