编辑 ~/.cargo/config ，修改第 3 - 5 行：
[source.crates-io]
registry = "https://github.com/rust-lang/crates.io-index"
replace-with = 'tuna'
[source.tuna]
registry = "https://mirrors.tuna.tsinghua.edu.cn/git/crates.io-index.git"替换为以下其中一个源：
# 清华大学
replace-with = 'tuna'
[source.tuna]
registry = "https://mirrors.tuna.tsinghua.edu.cn/git/crates.io-index.git"
# 中国科学技术大学
replace-with = 'ustc'
[source.ustc]
registry = "git://mirrors.ustc.edu.cn/crates.io-index"
# 上海交通大学
replace-with = 'sjtu'
[source.sjtu]
registry = "https://mirrors.sjtug.sjtu.edu.cn/git/crates.io-index"
# rustcc社区
replace-with = 'rustcc'
[source.rustcc]
registry = "git://crates.rustcc.cn/crates.io-index"
# 阿里云源
replace-with = 'rustcc'
[source.rustcc]
registry = "https://code.aliyun.com/rustcc/crates.io-index.git"