The following packages need to be synced: - app-accessibility/at-spi2-core - app-accessibility/at-spi2-gtk - net-libs/libsoup-gnome - x11-libs/gtk+:3 Usually 'diff -U 0 ... | patch ...' applies quite well. Then you need to manually move MULTILIB_USEDEPs that are rejected :).
gtk+:3 is done
at-spi2-core is done.
This is done.