{
  config,
  lib,
  pkgs,
  ...
}:
let
  inherit (lib.modules) mkIf;
  inherit (lib.lists) optional;
in
{
  xdg.portal = {
    enable = true;
    # Sets environment variable NIXOS_XDG_OPEN_USE_PORTAL to 1.
    # This will make xdg-open use the portal to open programs,
    # which resolves bugs involving programs opening inside FHS envs
    # or with unexpected env vars set from wrappers.
    # See #160923 for more info.
    xdgOpenUsePortal = true;
    extraPortals = [
      pkgs.xdg-desktop-portal-gtk
      pkgs.kdePackages.xdg-desktop-portal-kde
      pkgs.kdePackages.kwallet
      pkgs.xdg-desktop-portal-gnome
    ];
    config = {
      common = {
        "org.freedesktop.impl.portal.Secret" = [
          "kwallet"
        ];
        "org.freedesktop.secrets" = [ "kwalletd6" ];
      };
      niri = {
        default = [
          "gnome"
          "gtk"
          "kde"
        ];
        # Portal API reference:
        # https://docs.flatpak.org/en/latest/portal-api-reference.html
        # "org.freedesktop.impl.portal.Access" = ["kde"];
        # "org.freedesktop.impl.portal.Notification" = ["kde"];
        "org.freedesktop.impl.portal.FileChooser" = [ "kde" ];
      };
    };
  };
}