Currently, the GURU `app-crypt/certbot-dns-cloudflare-2.10.0-r1` ebuild adds dependencies on, among others, `dev-python/zope-interface` and `dev-python/dns-lexicon`. However, the dependency on `zope` was removed from Certbot and its plugins in version 2.0.0 entirely (see https://github.com/certbot/certbot/blob/master/certbot/CHANGELOG.md#changed-12) and the `certbot-dns-cloudflare` plugin does not use nor depends on the `dns-lexicon` library (see e.g. `grep -Ri dns-lexicon certbot-dns-*` in the Certbot git repo, noting `certbot-dns-cloudflare` does not come up, but others do). Therefore I'd recommend removing these useless dependencies entirely from the ebuild.
