I don't know, if this is possible (but i would think yes):
It would be nice, if the conky extension were configured in the way that by default conky, if started, looks for the user configuration file ~.conkyrc; and only if ~.conkyrc is not there (or if there is no X11 at all) it goes back to /usr/local/share/conky/files/conky.conf (or /usr/local/etc/conky/conky_nox11.conf).