Utilize lanzaboote for cross-arch installation?

[colemickens]

Say that I have:

1. An x86_64-linux development machine
2. An aarch64-linux SBC target machine (with USB/NVME, some sort of removable media that can be direct attached to the development machine)
3. A pre-built system NixOS topleve closure for the SBC target.

Today, installing NixOS directly onto media for the SBC is rather annoying.

These parts are "easy":

• configure target media (assume removable media that can be mounted to dev machine) - aka, disk/partition setup
• copy initial system closure

However, actually making it bootable is a pain. I have done some tricks in the past to get extlinux-compatible bootloader to dump a single generation configuration into a directory, which I can then manually install to the target /boot. Which, in the case of a u-boot system, is "'good enough".

Would it be possible to utilize lanzaboote to handle this cross-arch installation scenario?

I considered nixos-anywhere here, but there are a number of SBC boards, for example, where kexec does not work.