Change npm global install folder

README.md

How to change npm's global install folder

It can happen that npm install -g <package-name> reports an EPERM error. This means that npm isn't allowed to write to the directory without administrator rights. To fix this npm needs to be configured so that it uses a different folder.

Windows

1. Change npm config

npm config set prefix "%AppData%/npm"

2. Add the folder to PATH

Either use Windows' control panel to do this or the following script which changes the PATH for the current user (No admin rights required).

node windows-add-to-path.js

Hint: Don't use the setx command. It has a 1024 characters limit.

3. Logout

Log out and back in from your Windows user account.

4. Report back

If you have a github account, you should leave a comment and report back (Also if everything worked).

windows-add-to-path.js

var execSync = require('child_process').execSync
var paths = []
try {
  paths = execSync('reg query HKCU\\Environment /v PATH')
          .toString().split('\r\n')[2].split('    ')[3].split(';')
} catch (e) {}
paths.push('%AppData%\\npm')
execSync('reg add HKCU\\Environment /v PATH /t REG_SZ /d "' +
         paths.join(';') + '" /f')

How would I do this on Mac?