xf86-input-evdev-dev.tcz
   xf86-input-evdev.tcz
      mtdev.tcz
      udev-lib.tcz
      libevdev.tcz
   mtdev-dev.tcz
      mtdev.tcz
   udev-lib-dev.tcz
      udev-lib.tcz
   libevdev-dev.tcz
      libevdev.tcz