I had to supress fontsproto and the install goes further.
that's mean that you didn't updated obarun-install and obarun-install-themes before making the installation. Be sure to use the last version of both packages.
I have to stop with Ctrl c.
know issue, refer here :
https://wiki.obarun.org/doku.php?id=installation# troubleshooting
However the last version of the ISO (2018-05) resolve this issue. if you do not want to download the last ISO, just follow the instruction of the wiki