That's *not* what that button is for. Please leave a comment on the AUR page or ask on the forum. P.S. I just fixed pithos-git (upstream switched build systems) and pithos works for me. notify@aur.archlinux.org writes:

johnv [1] filed a deletion request for pithos [2]:

Pithos will not install. We all have tried both Pithos and Pithos-git. Please fix.

[1] https://aur.archlinux.org/account/johnv/ [2] https://aur.archlinux.org/pkgbase/pithos/