Custombuild does demand gmake, but will make an effort to install it with dpkg -r or ports if it's missing. If wanted: Spot checkmarks next to any two IP addresses then click the "Develop Nameservers for" button, deciding on the domain you'd like the nameservers for. You should use the https://daltonnakvf.theblogfairy.com/25925896/the-2-minute-rule-for-whmcs-install