Harvey-OS/harvey ? reverse-engineered prompt

I want to get this operating system repo built and bootable on my machine, and I’d like a simple guide plus any fixes needed to make that happen.

Please read the project and figure out the right build steps for a modern Unix like environment. If something is missing or outdated, update it so the build works cleanly, and make the instructions easy to follow for someone who is not deep into old operating system code. I mainly want to be able to compile it, produce a bootable image or whatever output this project uses, and understand how to run it in a VM for testing.

If you need to check current docs or old Plan 9 style build details online, go ahead. Also point out anything special I need to install first, and make sure the final result is as hands off as possible.