- Fix `node-gyp` runtime:
- Link `node_modules` to package's base directory because `node-gyp` and node.js packages in general,
is looking for `node_modules` directory in its base directory.
- Pull in `www/npm` as a runtime dependency, too, as `node-gyp` requires npm node_modules on run time,
- Build `textproc/node-re2` without `NODE_PATH` explicitly defined.