我正在尝试在OSX Sierra上安装Webpack。我使用了Sudo命令，这就是我得到的
shell-init: error retrieving current directory: getcwd: cannot access parent directories: Permission denied
path.js:1142
cwd = process.cwd();
^
Error: EACCES: permission denied, uv_cwd
at Error (native)
at Object.resolve (path.js:1142:25)
at startup (bootstrap_node.js:127:32)
at bootstrap_node.js:509:3
/usr/local/lib