post_install() {
  echo ">> To enable libtrash:"
  echo ">>   export LD_PRELOAD=/usr/lib/libtrash.sh"
  echo ">> To disable libtrash:"
  echo ">>   unset LD_PRELOAD"
  echo ">> WARNING: a few programs might not work while libtrash is enable"
  echo ">>          currently known: fakeroot, chromium and firefox"
  echo ">>          disable libtrash before using any of them."
}

post_upgrade() {
  post_install
}