It's unneeded on binary systems. Note, this is different from e.g.: bug 675226 - net-analyzer/nagios-core should rdepend on dev-libs/libltdl instead of sys-devel/libtool because pfqueue seems not need it at all, and that would mean there is no need for dev-libs/libltdl either.
The bug has been closed via the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=1dc1e64c80f0cc7011fecdda7f42ae4555a2d6e1 commit 1dc1e64c80f0cc7011fecdda7f42ae4555a2d6e1 Author: Sam James <sam@gentoo.org> AuthorDate: 2021-02-06 22:14:10 +0000 Commit: Sam James <sam@gentoo.org> CommitDate: 2021-02-06 22:14:10 +0000 net-mail/pfqueue: EAPI 7 Closes: https://bugs.gentoo.org/675232 Package-Manager: Portage-3.0.14, Repoman-3.0.2 Signed-off-by: Sam James <sam@gentoo.org> ...fqueue-0.5.6.ebuild => pfqueue-0.5.6-r1.ebuild} | 27 +++++++++++++--------- 1 file changed, 16 insertions(+), 11 deletions(-)