pre_install() {
    mkdir /etc/mkinitcpio.d/old
    mv -vf /etc/mkinitcpio.d/*.preset /etc/mkinitcpio.d/old
}
post_remove() {
    mv -vf /etc/mkinitcpio.d/old/* /etc/mkinitcpio.d/
    rm -rf /etc/mkinitcpio.d/old
}