bug#70954: No 'guix pull' substitutes for foreign distros?

[pelzflorian (Florian Pelz)]

I had not understood that you used the --commit option, sorry for the
misunderstanding.

Foreign distros are not treated specially, but configuration for
substitute authorization could be missing as described at the end
of [1].  I do not believe they are missing though:

Could you try “guix pull -q” to disable any other channels?

guix pull -q --commit=08360a2cd0f1c447c9ad25bef8ed317abcdb0c91

on my x86_64 Guix System laptop, like your machine A (that downloads
substitutes), builds
/gnu/store/1mwhp5crimgvqd4jmlfsj3017yk8vxsv-guix-packages-base-modules.drv
whose store path is different on your machine B (that does *not* get
substitutes).

Regards,
Florian

[1] https://guix.gnu.org/en/manual/devel/en/html_node/Getting-Started.html