post_upgrade() {
  if (( $(vercmp "$2" '5.1.0-2') < 0 )); then
    printf "NOTE: The qemu-ga.service has been renamed to qemu-guest-agent.service\n"
  fi
  if systemctl is-enabled --quiet qemu-ga.service &> /dev/null; then
    systemctl disable qemu-ga.service
    systemctl enable qemu-guest-agent.service
  fi
}