Since ibus 1.5.6 it is possible to use python3: "To enable python3, run './configure --with-python=python3' in ibus source directory." The current ibus-1.5.10 ebuild does only have python2_7 in PYTHON_TARGETS See also https://github.com/ibus/ibus/releases/tag/1.5.6 Reproducible: Always
https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=673ccb92d57ca308ed04825521b236b4f8cd3bb5 Thank you for reporting!