[aur-general] Package with arch-depending source

Hi, I'm maintaining a package in the AUR whose source is "arch-depending" (anaconda) For the moment I deal with that by putting the x86_64 version in the source/md5 array and adding a if [ "$CARCH" == "i686" ] (...) just after to modify it. Is that the usual way to do that? Or how should it be done? I see no information about that in the AUR guidelines. -- Ismael