Good morning, I recently attempted to lint a package declaration I've been working on, and it warned about disarchive.guix.gnu.org's SSL certificate. Seems that it expired on October 12, as best as I can tell. Fortunately, `lookup-disarchive-spec' uses other mirrors, so linting works, though I will admit I was a bit confused at first.
Thanks for the wonderful project! Looking forward to contributing back.