It did not repeat, and I'm using it on a hosted system with Ubuntu.

On Sat, Nov 7, 2020 at 4:59 PM Marius Bakke <marius@gnu.org> wrote:
Josh Marshall <joshua.r.marshall.1991@gmail.com> writes:

> Hello all,
>
> When pulling I came across the following which told me to send a report in:
>
> ```
> anadon@goodadvicemallard:~$ guix pull
> Updating channel 'guix' from Git repository at '
> https://git.savannah.gnu.org/git/guix.git'...

[...]

> substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0%
> @ substituter-started
> /gnu/store/4kq9k7cvwmg42hvk71m2kihiasz7x9z8-git-minimal-2.29.2

[...]

> gzip: stdin: unexpected end of file
> guix substitute: error: corrupt input while restoring
> '/gnu/store/4kq9k7cvwmg42hvk71m2kihiasz7x9z8-git-minimal-2.29.2/bin/git'
> from #{read pipe}#
> @ substituter-failed
> /gnu/store/4kq9k7cvwmg42hvk71m2kihiasz7x9z8-git-minimal-2.29.2 256 fetching
> path `/gnu/store/4kq9k7cvwmg42hvk71m2kihiasz7x9z8-git-minimal-2.29.2'
> failed with exit code 1

[...]

> ./guix/store.scm:1368:15: ERROR:
>   1. &store-protocol-error:
>       message: "some substitutes for the outputs of derivation
> `/gnu/store/6kd94qkd2hnkri5hc44vfjvh8b0i5ynl-git-minimal-2.29.2.drv' failed
> (usually happens due to networking issues); try `--fallback' to build
> derivation from source "

Probably this was a transient (network) failure, or is the error
consistent?

And for something completely different:

> /gnu/store/ncknl03pkmamrxg7q9nxi1rn1qhvwbi9-guix-1.0.1/libexec/guix/substitute

Consider updating the 'root' user Guix (or reconfigure, if you are on
Guix System), to get the latest version of guix-daemon.