bug#63794:

[Christopher Baines]

"N. Y." <ningyuan.sg@gmail.com> writes:

> Are there any workarounds, for an inexperienced user who does not know much 
> about guix? I am getting 404's for
>
> - 
> https://bordeaux.guix.gnu.org/nar/zstd/arnx6fnjq85wscmr894d64cj3529r3h1-wxPython-4.2.0.tar.xz
> - 
> https://bordeaux.guix.gnu.org/nar/zstd/26q8viimh3r73549drqigvz07kl9v6pr-webkitgtk-2.40.1.tar.xz
>
> After a recent guix pull to 3807876 of 
> https://git.savannah.gnu.org/git/guix.git

Yep, clearing the guix-daemon's substitute cache should workaround these
issues.

On my system, that can be done by running:

  sudo rm -r /var/guix/substitute/cache/

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