Is there a guide on how to install Guix with nonguix packages right away but using the latest upstream Guix installation image? (not one of the prepared images from system crafters or nonguix, or generating one with nonguix myself from an already running guix system)
Or maybe you guys can just help me out: If I add the nonguix channel during installation after writing my config, it will fail and tell me not enough disk space. Probably because it tries to "guix pull" with the new channel and obviously there isn't the space for that on the installation medium itself.

Or is first time install including nonguix linux kernel etc. really only possible if I have an installation image that comes with a cow-store that has nonguix in it?