post_install() {
  /usr/bin/getent group nitrokey >/dev/null 2>&1 ||  usr/sbin/groupadd -r nitrokey &>/dev/null
  udevadm control --reload
  xdg-icon-resource forceupdate --theme hicolor &> /dev/null
  update-desktop-database -q
  echo "Don't forget to add users to the nitrokey group."
}

post_upgrade() {
    post_install
}

post_remove() {
    xdg-icon-resource forceupdate --theme hicolor &> /dev/null
    update-desktop-database -q
    if /usr/bin/getent group nitrokey >/dev/null 2>&1; then
        /usr/sbin/groupdel nitrokey
    fi
}