Hi, Guillaume Le Vaillant skribis: > When trying to upgrade a machine using a substitute server on the same > LAN, I get this crash a lot: > > # guix system reconfigure --substitute-urls="http://192.168.0.22:8080 https://ci.guix.gnu.org" /etc/guix/config.scm > substitute: mise à jour des substituts depuis « http://192.168.0.22:8080 »... 100.0 % [...] > It looks like the 'narinfo-uri' field is an empty list instead of a list > of URIs. Is that supposed to be possible? I don’t think so. Could you grab a narinfo and share it? wget -qO - http://192.168.0.22:8080/HASH.narinfo where HASH is the hash part of a store item. What could happen though is a situation where ‘guix publish’ only offers a compression method not supported by the client. In that case, ‘narinfo-best-uri’ throws a match-error because ‘choices’ is the empty list. We should fix that. > Does the the attached patch adding a check for the validity of > this field in the 'valid-narinfo?' function make sense? Maybe, but I’d like to make sure we understand the issue. Thanks, Ludo’.