post_install() {
    echo "Setting default service to 'optimus' (if possible)"
    nvman default optimus

    echo -n "IMPORTANT! Run 'nvman default bumblebee' or 'nvman default optimus' to set "
    echo "one default service! (extremely needed)"

    echo "Enabling nvman.service (if possible)"
    systemctl enable nvman.service

    echo -n "IMPORTANT! Enable 'nvman.service' with 'systemctl enable nvman.service' "
    echo "(if it wasn't enabled yet)"
}