https://static.rust-lang.org/dist/rustc-VERSION-src.tar.xz
https://static.rust-lang.org/dist/2021-06-17/rust-std-1.53.0-x86_64-unknown-linux-musl.tar.xz?no-extract
https://static.rust-lang.org/dist/2021-06-17/rustc-1.53.0-x86_64-unknown-linux-musl.tar.xz?no-extract
https://static.rust-lang.org/dist/2021-06-17/cargo-1.53.0-x86_64-unknown-linux-musl.tar.xz?no-extract