post_install() {
    post_upgrade
    ln -s ../usr/share/zoneinfo/Europe/Amsterdam /etc/localtime
    echo "LANG=en_US.UTF-8" > /etc/locale.conf
}

post_upgrade() {
    for lang in en_US.UTF-8 de_AT.UTF-8 nl_NL.UTF-8 ja_JP.UTF-8; do
      sed 's/#\('$lang'\)/\1/' -i /etc/locale.gen
    done
    locale-gen
}