post_install() {
  if [ ! -h /etc/fonts/conf.d/10-symbols.conf ]; then
    ln -s /etc/fonts/conf.avail/10-symbols.conf /etc/fonts/conf.d/10-symbols.conf
  fi
}

post_upgrade() {
  post_install $1
}

post_remove() {
  if [ ! -e "/etc/fonts/conf.avail/10-symbols.conf" ] && [ -h "/etc/fonts/conf.d/10-symbols.conf" ]; then
    rm /etc/fonts/conf.d/10-symbols.conf
  fi
}