I made a deploy task (wrappable with gulp) and example Lambda function that efficiently runs any specified version of nodejs. Looks less polished than the OP's

I made a deploy task (wrappable with gulp) and example Lambda function that efficiently runs any specified version of nodejs. Looks less polished than the OP's tool but we've used it in production for about six months. https://github.com/zbjornson/lambda-deploy https://github.com/zbjornson/lambda-deploy