Unofficial plugin abandoned upstream. The only release is from 2014, last commits are from 2015. Little chances of porting to GTK+3. Still uses xfconf.eclass.
The bug has been referenced in the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=8b3e81fbdbed52211c1e2318d38b8789a6628561 commit 8b3e81fbdbed52211c1e2318d38b8789a6628561 Author: Michał Górny <mgorny@gentoo.org> AuthorDate: 2019-04-09 14:50:37 +0000 Commit: Michał Górny <mgorny@gentoo.org> CommitDate: 2019-04-09 14:50:37 +0000 package.mask: Last rite xfce-extra/xfce4-soundmenu-plugin Bug: https://bugs.gentoo.org/682940 Signed-off-by: Michał Górny <mgorny@gentoo.org> profiles/package.mask | 7 +++++++ 1 file changed, 7 insertions(+)