Heroku's way ahead of you... https://github.com/heroku/heroku-buildpack-nodejs/blob/a77cd257d1052d7bcffd5b5b261ee9794703daac/bin/compile#L36 https://github.com/

Heroku's way ahead of you... https://github.com/heroku/heroku-buildpack-nodejs/blob/a77cd257d1052d7bcffd5b5b261ee9794703daac/bin/compile#L36 https://github.com/heroku/heroku-buildpack-nodejs/blob/a77cd... EDIT: To clarify, though I haven't tried it myself, it looks like you can just specify `"engine.iojs": "1.0.0"` in your package.json, and Heroku will install the entire io.js system for you.