The /config directory survives reboot. You could build in a subdir below that.
(type 'mount' and see cryptic details)
I can't support that. /config is vfat.

yeah i tried that first but no go on /config for compile
but can we compile/create something and then stash it in /config?
Should be able to tar it up. Maybe save the packages you need there too.
hno said /config/network is executed at startup..