In short, I was unable to use wg-quick successfully until an implementation of resolvconf(8) was made available. This requirement should be expressed in the ebuild.
The bug has been closed via the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=95513fef437a6bc42c196885f3d4a45ff6b11947 commit 95513fef437a6bc42c196885f3d4a45ff6b11947 Author: Jason A. Donenfeld <zx2c4@gentoo.org> AuthorDate: 2019-12-28 08:03:27 +0000 Commit: Jason A. Donenfeld <zx2c4@gentoo.org> CommitDate: 2019-12-28 08:04:14 +0000 net-vpn/wireguard-tools: make wg-quick(8) optional Closes: https://bugs.gentoo.org/671894 Suggested-by: Aaron Jones <aaronmdjones@gmail.com> Package-Manager: Portage-2.3.84, Repoman-2.3.20 Signed-off-by: Jason A. Donenfeld <zx2c4@gentoo.org> net-vpn/wireguard-tools/metadata.xml | 3 +++ net-vpn/wireguard-tools/wireguard-tools-1.0.20191226.ebuild | 9 +++++++-- net-vpn/wireguard-tools/wireguard-tools-9999.ebuild | 9 +++++++-- 3 files changed, 17 insertions(+), 4 deletions(-)