Install this version:
emerge -a =app-admin/sudoers-dispatch-conf-1.0
If this version is masked, you can unmask it using the autounmask tool or standard emerge options:
autounmask =app-admin/sudoers-dispatch-conf-1.0
Or alternatively:
emerge --autounmask-write -a =app-admin/sudoers-dispatch-conf-1.0
EAPI=8
DESCRIPTION="Installs a sudoers.d drop-in to enable dispatch-conf without password"
HOMEPAGE="https://www.sudo.ws/"
LICENSE="public-domain"
SLOT="0"
KEYWORDS="~amd64 ~arm ~arm64"
RDEPEND="app-admin/sudo"
S="${WORKDIR}"
src_install() {
insinto /etc/sudoers.d
newins "${FILESDIR}"/10-dispatch-conf 10-dispatch-conf
fperms 0440 /etc/sudoers.d/10-dispatch-conf
}