post_install() {
  if (! pacman -Qqs '^aquaria-data' >/dev/null); then
    echo "Note:"
    echo " | This package only provides the game engine. You will also"
    echo " | need to install the proprietary game data, using one of the"
    echo " | aquaria-data-* packages."
  fi
}

post_upgrade() {
  post_install "$@"
}