The Makefile rule for docs specifies --verbose, --out, --title, --github, --index command-line options. None of these seem to be implemented any more. Maybe that's why npm install dox followed by make docs in node_modules/dox just hangs.
npm install dox
I guess this is leftover from the "no longer generates an opinionated structure or style for your docs" change. Alas the web still links and describes the "dox" that no longer exists, e.g. http://dailyjs.com/2011/01/20/framework-part-47/