Hi Ludo and Chris,
> Could it be that those old systems were talking to hydra.gnu.org and
> thus not getting any substitutes?
>
> https://lists.gnu.org/archive/html/info-guix/2019-06/msg00001.html
That's what happened to me on my oldest Guix installation (hosted on
Ubuntu). I had done regular pulls on my user account, but not on the
root account, meaning that I was running an ancient daemon that tried to
connect to hydra.
Fix (reconstructed from memory!): on the root account, do
guix pull –substitute-urls=https://ci.guix.gnu.org
guix package update
and reboot.
Cheers,
Konrad.
