Error booting aarch64 installation image (was: Building arm64 guix system image)

[Max Brieiev]

Hi Roman,

Roman Scherer <roman.scherer@burningswell.com> writes:

> I'm running Guix system on an Apple M1 and also run into these
> issues. At the moment I'm using the following commit to build my system:
>
> 7833acab0da02335941974608510c02e2d1d8069

Thank you, I managed to build installation image from this commit like
this:

    guix time-machine --commit=7833acab0da02335941974608510c02e2d1d8069 -- 
system image --system=aarch64-linux -t iso9660 
~/code/guix/gnu/system/install.scm 
    ...
    /gnu/store/rqf53a5xx3dknk689ag620n5617pqpj3-image.iso

But now I have another problem, this image throws an error after
selecting the "GNU Guix installation 1.4.0" entry in Grub:

    error: invalid magic number.
    error: you need to load the kernel first.

I googled a bit about this error and most answers suggest that the image
is corrupted in one way or another.

How can I debug this error?