> There isn’t a single universal standard for sandboxing across all the different platforms that are supported by Rust.

I said OS level. It's something I should easily be able to do via the OS capabilities that would work for rust, npm, etc.

I would use it not only for rust builds but for nearly every app on my computer.

> 1. There isn’t a single universal standard for sandboxing across all the different platforms that are supported by Rust.

Yeah, let's hold up the entire world of offensive cybersecurity capability while you work on that. Sure they will wait.

> 2. Even if there were, if you’re compiling untrusted code then why would you trust the built output?

You don't. You sandbox the hell out of it too.