Efraim Flashner <efraim@flashner.co.il> writes:

> On Tue, Feb 18, 2020 at 12:31:39PM +0100, Pierre Neidhardt wrote:
>> Hi!
>> 
>> The 'mame' package is not available on ci.guix.gnu.org for some reason,
>> so I did build it locally on my desktop.
>> 
>> Now I'd like to transfer this build artifact to my laptop.
>> 
>> On my desktop I ran
>> 
>> --8<---------------cut here---------------start------------->8---
>> sudo guix archive --generate-key
>> sudo guix publish 
>> --8<---------------cut here---------------end--------------->8---
>
> did you transfer the public key to your other machine and run 'sudo guix
> archive --import < /path/to/public/key'?

That was it, I had forgotten to import the public key!

By the way, it's

--8<---------------cut here---------------start------------->8---
sudo guix archive --authorize < /path/to/public/key
--8<---------------cut here---------------end--------------->8---

not `--import` :)

> Try giving it a few minutes to "bake" the substitute and then serve it.
> It needs to re-compress it to make transfers (at a large scale) more
> economical.

I didn't enable caching so the compression should happen on the fly.

> Doesn't address the substitute/publish problem, but have you tried using
> guix copy to copy it over?

I haven't but I want to use `guix publish` since it provides a more
automated, smoother experience.

Problem solved, thanks!
-- 
Pierre Neidhardt
https://ambrevar.xyz/