Forums Scripts & Popups on join help

i know that if you /set %var #channel
works for ON *:join:%var:{ }

but is there a way to make $alias instead %var

i have some channels written in ini like:

channels= #chan1 #chan2

and: alias chans { return $readini(path, section, subsection) }

but ON *:join:$chans:{ } doesnt work
any work around for this ?