Just got the following error. How can I exclude node_modules from being watched with middleman (which I think is a waste of resources imho) and how can I exclude other directories from being watched?
== Blog Sources: posts/{lang}/{year}-{month}-{day}-{title}.html (:prefix + :sources)
** ERROR: directory is already being watched! **
Directory: /exos/middleman/source/javascripts/vendor/mathjax
is already being watched through: /exos/middleman/node_modules/mathjax
MORE INFO: https://github.com/guard/listen/wiki/Duplicate-directory-errors
== View your site at "http://127.0.0.1:4567"