Runnign npm run watch fails

[hallahan]

When I run npm run watch, I get this error:

npm run watch

> leaflet-mapbox-vector-tile@0.1.3 watch /Users/nick/code/Leaflet.MapboxVectorTile
> watchify -v -d src/MVTSource.js -o dist/Leaflet.MapboxVectorTile.js


events.js:72
        throw er; // Unhandled 'error' event
              ^
Error: ENOTDIR, lstat '/Users/nick/code/Leaflet.MapboxVectorTile/node_modules/vector-tile/lib/vectortilelayer.js/package.json'

npm ERR! leaflet-mapbox-vector-tile@0.1.3 watch: `watchify -v -d src/MVTSource.js -o dist/Leaflet.MapboxVectorTile.js`

But when I run the command as:

watchify -v -d src/MVTSource.js -o dist/Leaflet.MapboxVectorTile.js

All is well. Something is off with paths. Maybe in the Mapbox package???