Great. Thanks you. Seems to be working just fine.
Perhaps the next step would be a two-in-one builder that generates js on the fly from a coffeescript file and then checks it?
I tried doing it but didn't get very far, basically I tried to edit the build file to not check $file, but to check "coffee -cp $file", which would return the compiled JS, but this didn't seem to work, perhaps you can do something with this information.