{
  test.stubs = {
    fcitx5 = {
      version = "0";
      outPath = null;
      buildScript = ''
        mkdir -p $out/bin $out/share/applications $out/etc/xdg/autostart
        touch $out/bin/fcitx5 \
              $out/bin/fcitx5-config-qt \
              $out/share/applications/org.fcitx.Fcitx5.desktop \
              $out/etc/xdg/autostart/org.fcitx.Fcitx5.desktop
        chmod +x $out/bin/fcitx5 \
                 $out/bin/fcitx5-config-qt
      '';
    };
    fcitx5-configtool = { outPath = null; };
    fcitx5-lua = { outPath = null; };
    fcitx5-gtk = { outPath = null; };
    fcitx5-chinese-addons = { outPath = null; };

    gtk2 = {
      buildScript = ''
        mkdir -p $out/bin
        echo '#/usr/bin/env bash' > $out/bin/gtk-query-immodules-2.0
        chmod +x $out/bin/*
      '';
    };
    gtk3 = {
      buildScript = ''
        mkdir -p $out/bin
        echo '#/usr/bin/env bash' > $out/bin/gtk-query-immodules-3.0
        chmod +x $out/bin/*
      '';
    };
  };

  nixpkgs.overlays = [
    (final: super: {
      libsForQt5 = super.libsForQt5.overrideScope' (qt5prev: qt5final: {
        fcitx5-qt = super.mkStubPackage { outPath = null; };
      });

      qt6Packages = super.qt6Packages.overrideScope' (qt6prev: qt6final: {
        fcitx5-qt = super.mkStubPackage { outPath = null; };
      });

      fcitx5-with-addons = super.fcitx5-with-addons.override {
        inherit (final) libsForQt5 qt6Packages;
      };
    })
  ];
}