ember-cli-broccoli fails with EEXIST ... tmp/.DS_STORE

I've been running into this issue all day whenever I would save a file (*.hbs, *.js) locally while running ember serve and couldn't figure out what the deal was:

The Broccoli Plugin: [broccoli-persistent-filter:Babel > [Babel: ember-inflector]: Babel: ember-inflector] failed with:

Error: EEXIST: file already exists, symlink 
'/Users/myusername/Documents/my-project/tmp/broccoli_persistent_filterbabel__babel_ember_inflector-input_base_path-http://ift.tt/2wALFjz'
-> 
'/Users/myusername/Documents/my-project/tmp/broccoli_persistent_filterbabel__babel_ember_inflector-output_path-http://ift.tt/2vFEVn5'

I tried rm -rf tmp I tried cleaning everything, restarting my Text Editor (Atom) I searched all over the internet...