I am wondering if zero is meant for development or production. If it is for development, then it makes sense that the React uses the development version, but then it wouldn't make sense for it to be rendered on the server side if it was only for development. If it was for production, then it wouldn't make sense that the React version used is the development version. What is zero meant to be used for? If it is for both, then you should probably have a --dev or -d flag to use the development while just normal zero would act like it was in production.