安装npm install --save babel-generator报错

我在终端执行如下命令

npm install --save babel-generator

会出现报错：

npm ERR! code EPERM
npm ERR! syscall mkdir
npm ERR! path E:\progarm\javascript\nodejs\node_cache\_cacache\index-v5\b0\1f
npm ERR! errno -4048
npm ERR! Error: EPERM: operation not permitted, mkdir 'E:\progarm\javascript\nodejs\node_cache\_cacache\index-v5\b0\1f'
npm ERR!  [Error: EPERM: operation not permitted, mkdir 'E:\progarm\javascript\nodejs\node_cache\_cacache\index-v5\b0\1f'] {
npm ERR!   errno: -4048,
npm ERR!   code: 'EPERM',
npm ERR!   syscall: 'mkdir',
npm ERR!   path: 'E:\\progarm\\javascript\\nodejs\\node_cache\\_cacache\\index-v5\\b0\\1f',
npm ERR!   requiredBy: '.'
npm ERR! }
npm ERR!
npm ERR! The operation was rejected by your operating system.
npm ERR! It's possible that the file was already in use (by a text editor or antivirus),
npm ERR! or that you lack permissions to access it.
npm ERR!
npm ERR! If you believe this might be a permissions issue, please double-check the
npm ERR! permissions of the file and its containing directories, or try running
npm ERR! the command again as root/Administrator.

npm ERR! Log files were not written due to an error writing to the directory: E:\progarm\javascript\nodejs\node_cache\_logs
npm ERR! You can rerun the command with `--loglevel=verbose` to see the logs in your terminal

最后，以管理员身份打开命令提示符，执行此语句，安装成功