How to access gamepad triggers at runtime

I have used the following code very successfully in the editor:

if (Input.GetAxisRaw("fire1") > 0.0f) {...}

with the input set as:
http://i.imgur.com/A9LjeyO.png

However I was wondering how you access triggers in an actual game build, not just running in the editor/run.

I'm sure this is a very novice question, so I was also hoping if somebody could direct me to the documentation that explains this behavior. I googled to the best of my ability but couldn't find anything explaining the difference.

tl;dr triggers work in editor but not in build, why?