post_install() {
  hash nmcli 2>/dev/null && echo '
  WARNING: You seem to have Network Manager installed.
  As of 1.0.6, this no longer works with NetworkManager.
  Use the solution from
  https://wiki.archlinux.org/index.php/Wake-on-LAN#NetworkManager
  instead.
  '

  cat <<EOT
Now you may enable WOL on each boot with:

    systemctl enable wol@eth0

If you wish to have WOL enabled once, simply call:

    systemctl start wol@eth0

EOT
}

post_upgrade() {
  post_install
}