Current savedconfig's restore_config() works only in unpack & compile phases, while for EAPI=2 it would be desirable to use it within src_prepare().
Created attachment 187969 [details, diff] Patch to let restore_config() be called within src_prepare()
http://sources.gentoo.org/eclass/savedconfig.eclass?r1=1.9&r2=1.10
Works fine. Thanks.