Rather than messing with fetch-develop.deps.sh / mandating manual linked checkouts, or having to run three separate npm run start processes, it would be much more simpler if riot-web just let you npm run build or npm run start on develop to pull in the right versions of react-sdk and js-sdk as per package.json. Users could then npm link if they want to customise a particular version of the dep, but would ever only need a single npm run start instance.