<a href="https:&#x2F;&#x2F;github.com&#x2F;rust-lang-nursery&#x2F;rustup.rs" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;rust-lang-nursery&#x2F;rustup.rs</a> is the repo.<p>The setup tool and the tool itself are the same binary. The rustup install is basically copying rustup-init.exe to `~&#x2F;.cargo&#x2F;bin&#x2F;rustup.exe`.