nixos-config/modules/workstation/desktop.nix

{ config, lib, pkgs, ... }:
with lib;
let
  usersHasSway = builtins.any
    (user:
      config.home-manager.users.${user}.desktop.enableSwayStack
    )
    (builtins.attrNames config.machineUsers);
in
{
  programs.sway = {
    enable = usersHasSway;
  };

  xdg.portal = mkIf usersHasSway {
    enable = true;
    wlr.enable = true;
  };
}