post_install() {
  post_upgrade
  echo 'To use device as a normal user, add user to bit-babbler group'

}

post_upgrade() {
  getent group bit-babbler &> /dev/null || groupadd bit-babbler &> /dev/null
  sysctl -q --load /etc/sysctl.d/bit-babbler-sysctl.conf
  udevadm control --reload-rules
}

post_remove() {
  udevadm control --reload-rules
}