Client fails to find package (mame) with guix publish

[Pierre Neidhardt]

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---

Then on my laptop I ran

--8<---------------cut here---------------start------------->8---
guix time-machine --commit=a74e231 -- build mame 
--substitute-urls="http://192.168.1.27:8080 https://ci.guix.gnu.org";
--8<---------------cut here---------------end--------------->8---

The desktop then displays a bunch of

--8<---------------cut here---------------start------------->8---
GET /ddjh5vxa692nllffzz92mvyclqv79bkn.narinfo
GET /j8hk0nv8fn5k5i55z85jhs41x2hvcy5n.narinfo
...
--8<---------------cut here---------------end--------------->8---

so I guess this means publishing works.
However my laptop does not fetch the mame substitute and starts building
mame again, which takes hours.

Any idea what's wrong?

-- 
Pierre Neidhardt
https://ambrevar.xyz/

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