Hello,
From documentation:
Additionally, your channel must provide all the OpenPGP keys that were ever
mentioned in .guix-authorizations, stored as .key files, which can be either
binary or “ASCII-armored”.
In Jeko’s case, the key is stored in a jeko-A2E0F15D.asc file, which breaks
the documented assumption. My key is named marekpasnikowski.key , for
reference.
Hopefully, the name problem is the only problem here.
I also share the opinion that the documentation is written in a confusing
style, especially for novices.
Marek pointed me to the right direction.
Renaming the key file with .key extension solved the problem.
Thank you all for the help.
Happy new year, wish you and your loved ones all the best.
Jérémy