我想写一个像这样的脚本：

{
    "scripts":
        "setup": "mkdir -p ./my-dir"
}

字符串
它失败了，至少在Windows上，即使我从Git Bash提示符运行它。即使只尝试mkdir ./my-dir也不起作用。我不知道它会失败的任何原因。
它给出的错误是“语法不正确”错误：

> [email protected] stage C:\my-app
> mkdir ./my-dir

The syntax of the command is incorrect.

npm ERR! Windows_NT 6.1.7601
npm ERR! argv "C:\\Program Files\\nodejs\\node.exe" "C:\\Program Files\\nodejs\\node_modules\\npm\\bin\\npm-cli.js" "run" "stage"
npm ERR! node v6.4.0
npm ERR! npm  v3.10.3
npm ERR! code ELIFECYCLE
npm ERR! [email protected] stage: `mkdir ./my-dir`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the [email protected] stage script 'mkdir ./my-dir'.
npm ERR! Make sure you have the latest version of node.js and npm installed.
npm ERR! If you do, this is most likely a problem with the my-app package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR!     mkdir ./my-dir
npm ERR! You can get information on how to open an issue for this project with:
npm ERR!     npm bugs my-app
npm ERR! Or if that isn't available, you can get their info via:
npm ERR!     npm owner ls my-app
npm ERR! There is likely additional logging output above.

npm ERR! Please include the following file with any support request:
npm ERR!     C:\my-app\npm-debug.log

型
如果这不起作用，有没有跨平台友好的方法来初始化一个空目录？