dev-libs/gobject-introspection is a python-single-r1.eclass using ebuild. It only installs tools that use python, does not expose anything for other consumers to use in python. You shouldn't be having a $PYTHON_USEDEP on your gobject-introspection dep. Please remove it from all your ebuilds. gobject-introspection is losing python2 from its PYTHON_COMPAT, but fortunately this isn't a real problem for gajim, as it already doesn't support python2 in any of its versions. So you can probably just remove it without worry and definitely WITHOUT a revbump, as there will be no practical changes (unlike for 2 other packages doing this that happen to still support python2)
The bug has been closed via the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=af867e27bfc163708aa1f91e1cbdf035a77480bf commit af867e27bfc163708aa1f91e1cbdf035a77480bf Author: Hanno <hanno@gentoo.org> AuthorDate: 2019-08-19 09:19:24 +0000 Commit: Hanno <hanno@gentoo.org> CommitDate: 2019-08-19 09:19:24 +0000 net-im/gajim: Fix wrong PYTHON_USEDEP. Closes: https://bugs.gentoo.org/691418 Signed-off-by: Hanno Boeck <hanno@gentoo.org> Package-Manager: Portage-2.3.72, Repoman-2.3.17 net-im/gajim/gajim-1.0.3-r1.ebuild | 2 +- net-im/gajim/gajim-1.0.3.ebuild | 2 +- net-im/gajim/gajim-1.1.3.ebuild | 2 +- 3 files changed, 3 insertions(+), 3 deletions(-)