I don't think this is currently possible - but was wondering if using local modules (available in NPM 2.0) is planned to be supported in the future. Would be great to have this capability...
More info on local modules here: http://www.devworkflows.com/posts/using-local-npm-modules-in-npm-v2-0/
More info on local modules here: http://www.devworkflows.com/posts/using-local-npm-modules-in-npm-v2-0/