Hi Ludo’, Thank you very much for your effort in tracking this down!
Just to be clear, in case this is server-related: I reported this issue when it happened to me with bordeaux, but I have a (nonfree) substitute server before it in the list, which fails more frequently (and which I'm happy to name on request). I can't remember ever seeing the same failure with ci.guix.gnu.org, but that may just be down to random chance, since ci.guix is checked last on my system. So, my list of substitute servers is, in order: 1. https://substitutes.[redacted].org: most frequent TLS errors 2. https://bordeaux.guix.gnu.org: very occasional TLS errors 3. https://ci.guix.gnu.org: no TLS errors observed Ludovic Courtès wrote 1 weeks ago <https://issues.guix.gnu.org/76558>: > At long last. Note that we'll need to update the ‘guix’ package to make this > change effective. That explains why it's still happening to me then! Cheers, Timo