.cargo 目录 cd ~/.cargoconfig 的文件config 文件写入[source.crates-io]
registry = "https://github.com/rust-lang/crates.io-index"
replace-with = ‘ustc‘
[source.ustc]
registry = "git://mirrors.ustc.edu.cn/crates.io-index"
原文：https://www.cnblogs.com/skzxc/p/12291782.html