post_upgrade() {
  /usr/bin/getent group 'lrun' >/dev/null 2>&1 ||  usr/bin/groupadd -g '593' 'lrun' &>/dev/null
}

post_install() {
  post_upgrade
  echo 'NOTE: To run lrun as normal user you have to add yourself into lrun group'
}

post_remove() {
  if /usr/bin/getent group 'lrun' >/dev/null 2>&1; then
    /usr/bin/groupdel 'lrun'
  fi
}