Several current applications use the PHP extension bz2 or bzip2, which is missing (run: PHP -m) and cannot be installed from custombuil2. It's annoying having to use cPanel or CWP when everything is nice in DirectAdmin.
If anyone else has this problem, please support with your vote
It requires the following to enable it:
./build set_php bz2
Alternatively, you may do all of this in CustomBuild GUI on admin level as well :)