post_install() {
  getent passwd lxdm > /dev/null 2>&1 && \
    usermod -L -c 'Lightweight X11 Display Manager' -d /var/lib/lxdm -s /sbin/nologin lxdm > /dev/null 2>&1 || \
    useradd -rM -c 'Lightweight X11 Display Manager' -d /var/lib/lxdm -s /sbin/nologin lxdm
  mkdir -p /var/lib/lxdm
  chown lxdm:lxdm /var/lib/lxdm
  chmod 700 /var/lib/lxdm
}

post_upgrade() {
  post_install
}