post_install() {
  getent group mock >/dev/null || groupadd -r mock
  install -o root -g mock -m 02755 -d /var/{cache,lib}/mock

  echo 'You must add yourself to the mock group in order to run mock.'
}

post_remove() {
  getent group mock >/dev/null && groupdel mock
  echo 'Make sure to empty out /var/lib/mock and /var/cache/mock'
}