nixos/system/sway.nix

{ pkgs, username, ... }:
{
  environment = {
    sessionVariables.GRIM_DEFAULT_DIR = "$HOME/Pictures/Screenshots";
    systemPackages = [ pkgs.xarchiver ];
  };
  programs = {
    thunar = {
      enable = true;
      plugins = with pkgs.xfce; [
        thunar-archive-plugin
        thunar-volman
      ];
    };
    sway.enable = true;
  };
  services = {
    tumbler.enable = true;
    udisks2.enable = true;
    gvfs = {
      enable = true;
      package = pkgs.gnome3.gvfs;
    };
    greetd = {
      enable = true;
      settings =
        let
          default_session.command = "sway";
        in
        {
          inherit default_session;
          initial_session = {
            inherit (default_session) command;
            user = username;
          };
        };
    };
  };
  qt = {
    enable = true;
    style = "adwaita";
    platformTheme = "gnome";
  };
  xdg.portal = {
    enable = true;
    config.common.default = "*"; # TODO change for xdg-desktop-portal > 1.17 changes
    extraPortals = [ pkgs.xdg-desktop-portal-gtk ];
  };
}