> Looks good, but I would call it “Building from Git”, for instance, with
> this particular error as a caveat.

OK.

> Remove “just”.

OK.

> I would also link to the “Installation” section of the manual, and to
> “Installing Guix from Guix” in README.

> WDYT?

Can I use 'README' instead of 'HACKING', then?  All installation
instructions are there.