Felix Lechner via <help-guix@gnu.org> writes:

> What can I do about this error, please?
>
>   2. &message: "https://bordeaux.guix.gnu.org/nar/zstd/mxxszppxdv8nysq3in7f54xfn46y4sdw-xfce4-panel-4.18.3.tar.xz:
> HTTP download failed: 404 (\"Not Found\")"
>
> I tried '--fallback' but that only went one step further before
> erroring out, as well:
>
>   guix home: error: corrupt input while restoring archive from
> #<closed: file 7fa554326c40>
>
> The full log is below. Thanks!

You should be able to work around the issue by removing the
guix-daemon's substitute cache.

e.g. sudo rm -r /var/guix/substitute/cache/