Hi,

I recently got the following output:

substitutie van /gnu/store/yzswm5i0l0rvc01lfkb5z5lz4a85p6z8-rust-proc-macro-error-attr-1.0.4-lib is klaar
/gnu/store/zi1yc0fmq7yi564sv23h13qc97s445bb-rust-prost-derive-0.9.0-lib vervangen...
guix substitute: waarschuwing: tijdens het binnenhalen van https://ci.guix.gnu.org/nar/lzip/6p12gnwvfmqbfhdhcak71dcwkgd10ir7-rust-codespan-reporting-0.11.0-[..]
guix substitute: waarschuwing: probeer ‘--no-substitutes’ als het probleem hardnekkig is
guix substitute: fout: connect*: Verbinding is verlopen
vervanging van /gnu/store/6p12gnwvfmqbfhdhcak71dcwkgd10ir7-rust-codespan-reporting-0.11.0-lib mislukt
guix build: fout: beschadigde invoer tijdens het terugplaatsen van het archief uit #<closed: file 7f80ab995e00>

i.e.:

guix substitute: warning: while fetching ~a: server is somewhat slow~%
guix substitute: warning: try `--no-substitutes' if the problem persists~%
guix substitute: error: connect*: Connection timed out
substitution of ~a failed
guix build: error: corrupt input while restoring archive from ~s~%"

Two remarks:

I don't think a timeout counts as "corrupted", "corrupted" sounds like a bit flip or such happened or that there is a bug in the nix archive code that causes the archive to be (non-deterministically?) misparsed.
The name of the procedure 'connect*' sounds like an implementation detail, could the error message be changed to plainly state it's just a timeout?

Maybe a duplicate of <https://issues.guix.gnu.org/23557>.

Possibly the same issue as <https://issues.guix.gnu.org/55820>?

Greetings,
Maxime