As reported in nodejs/nodejs.org#969, the v6.8.1 release has modules: null in https://nodejs.org/download/release/index.json.
I assume the modules value originates from fetchModVersion() in dist-indexer.js. I've manually tested the regexes in that method against node_version.h and node.h, where the former seems to match perfectly fine, meaning it should not have resolved the modules value to null.
Any thoughts on how this might have happened? Could we execute dist-indexer.js manually to see if it was a temporary glitch, and the correct modules value gets resolved now?