Cross-compiling VyOS

Has anyone cross-compiled VyOS yet? I’m looking specifically at arm, to build VyOS on a Raspberry Pi.

I’ve been messing around a bit to get an Emdebian squeeze dev box set up; Emdebian for squeeze isn’t quite maintained anymore and the master mirror is offline, but there is a mirror on which you can add:

deb squeeze main

From there you can install a cross toolchain, and build binaries for other architectures.

Daniil mentioned that someone was working on adding options to build-iso for it, but I can’t find them in the changelog. I guess that’s the next step to understand. Has anyone gotten this far yet?