使用了 node-sass 的同学有福了，cnpm 将 node-sass 的二进制文件也从 github 镜像到 taobao npm 了。https://github.com/cnpm/cnpm/pull/76

这样大家就能通过 cnpm install node-sass 快速地安装了。

cnpm i node-sass 从原来的需要 build，到现在 20s 就安装完了。

before:

time tnpm i node-sass --no-cache
\
> [email protected] postinstall /private/tmp/node_modules/node-sass/node_modules/cross-spawn/node_modules/spawn-sync
> node postinstall

|
> [email protected] install /private/tmp/node_modules/node-sass
> node scripts/install.js

Cannot download "https://github.com/sass/node-sass/releases/download/v3.4.1/darwin-x64-46_binding.node": 

read ECONNRESET

Hint: If github.com is not accessible in your location
      try setting a proxy via HTTP_PROXY, e.g. 

      export HTTP_PROXY=http://example.com:1234

or configure npm proxy via

      npm config set proxy http://example.com:8080

> [email protected] postinstall /private/tmp/node_modules/node-sass
> node scripts/build.js

after:

[tnpm] Finish 22s json/tgz: 0/173, size/speed 2.35MB/479.6kB/s, total/keepalive/queue: 173/0/0

real    0m22.982s
user    0m12.398s
sys 0m2.641s