Custombuild does demand gmake, but will try to install it with dpkg -r or ports if It can be missing. If necessary: pkg install gcc gmake perl5 wget bison flex cyrus-sasl cmake python autoconf libtool libarchive iconv bind911 mailx webalizer gettext-runtime udns sudo psmisc tar openssl krb5 Decide on the https://directadmin-install56677.blogginaway.com/26635002/5-essential-elements-for-magento-2-migration