This is a bit old but I just installed Antergos and wanted bitshares on it.
Found this thread and a solution (well for me) 5 minutes later
I downloaded the .deb package from the bitshares site.
I installed 'debtab' from the AUR.
sudo debtap -u (first run requirement)
debtap -U bitshares-blah.blah.deb
sudo pacman -U bitshares-blah.blah.pkg.tar.xz
Figured it might help someone.