Quassel always links to libQt5DBus.so.5 if it finds it, even if emerged with USE=-dbus. This forces a rebuild if you later uninstall qtdbus.
Probably needs $(cmake-utils_use_find_package dbus Qt5DBus) in src_configure.
The bug has been closed via the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=f6c2aec1bd0155eaffe2c2756109f8884fc8d893 commit f6c2aec1bd0155eaffe2c2756109f8884fc8d893 Author: Johannes Huber <johu@gentoo.org> AuthorDate: 2018-03-22 19:41:07 +0000 Commit: Johannes Huber <johu@gentoo.org> CommitDate: 2018-03-22 19:56:21 +0000 net-irc/quassel: Fix automagic dep on qtdbus Closes: https://bugs.gentoo.org/644810 Reported-by: Diogo Pereira <sir.suriv@gmail.com> Thanks-to: Mike Gilbert <floppym@gentoo.org> Package-Manager: Portage-2.3.24, Repoman-2.3.6 net-irc/quassel/quassel-0.12.4-r1.ebuild | 3 ++- net-irc/quassel/quassel-9999.ebuild | 3 ++- 2 files changed, 4 insertions(+), 2 deletions(-)