Build failing due to browserify on clinker

[viddo]

Last case on clinker failing

...
Running "browserify:new_dashboard" (browserify) task
00:01:30.649 >> Error: Cannot find module 'new_dashboard/router' from '/home/administrador/jenkins/workspace/CartoDB-PR-testing/lib/assets/javascripts/cartodb/new_dashboard'
00:01:30.651 Warning: Error running grunt-browserify. Use --force to continue.
00:01:30.652 
00:01:30.653 Aborted due to warnings.
00:01:30.661 make: *** [check-frontend] Error 6
00:01:30.678 Build step 'Execute shell' marked build as failure
...

However, the file do exist and re-trigger a build seems to fix it on clinker. So far only @xavijam have been able to reproduce it locally, and fixed by re-installing npm packages (i.e. deleting node_modules dir and run npm install). Unfortunately he doesn't have a backup of that dir so we could do a diff to see what changed.

[viddo]

My guess right now is that something got changed in some browserify-related package which we have installed locally but which is not installed on clinker. I'll try to update the browserify version we have set right now and see fi I can provoke this on a PR (we'll need to update sooner or later anyway so might as well do it now).