That's why I really like Yarn's "offline mirror" feature. It lets you cache the tarballs themselves locally. There's also a tool called `shrinkpack` that lets

That's why I really like Yarn's "offline mirror" feature. It lets you cache the tarballs themselves locally. There's also a tool called `shrinkpack` that lets you do the same when working with NPM itself, but I'm not sure if it works right with NPM5/6. I wrote a post a while back about using Yarn's offline mirror: http://blog.isquaredsoftware.com/2017/07/practical-redux-part-9-managing-dependencies/ http://blog.isquaredsoftware.com/2017/07/practical-redux-par...