A few things:<p>1. If an offline build does not work, that&#x27;s a bug. This use case is one that we explicitly want and need, and do already support.<p>2. You are incorrect about Rust. Rust is written in Rust, not C++, and so building Rust involves downloading a binary of a previous Rust. That&#x27;s what &#x27;boostrapping&#x27; means.