Npm install -g ionic@1.3.0 fails


#1
$ npm install -g ionic@1.3.0
npm ERR! fetch failed https://registry.npmjs.org/i/-/i-0.3.2.tgz
npm WARN retry will retry, error on last attempt: Error: fetch failed with status code 404

I don’t know why https://registry.npmjs.org/i/-/i-0.3.2.tgz is required, but it’s a 404.
How can I use this version of ionic?