https://static.rust-lang.org/dist/rustc-VERSION-src.tar.xz
https://static.rust-lang.org/dist/2021-07-29/rust-std-1.54.0-x86_64-unknown-linux-musl.tar.xz?no-extract
https://static.rust-lang.org/dist/2021-07-29/rustc-1.54.0-x86_64-unknown-linux-musl.tar.xz?no-extract
https://static.rust-lang.org/dist/2021-07-29/cargo-1.54.0-x86_64-unknown-linux-musl.tar.xz?no-extract