The net-im/mcabber ebuild has a use flag modules, which seems to enable a plugin system [1]. There's no local useflag description and the global one says: modules - Build the kernel modules So this seems wrong, as this has nothing to do with kernel modules. Also it seems this is disabled by default in modern profiles, while this is a standard upstream feature. I recommend renaming the flag and making it enabled by default. [1] http://wiki.mcabber.com/Modules.html
I dropped the flag and enabled this functionality by default. Fixed in mcabber-9999 and -1.1.0-r1. Just pushed. Thanks!