How to add enviroment variables (WINEDLLOVERRIDES="winmm=n,b")

Hi, I’m trying to set this environment variable on a bottle:


I have tried everything but nothing work, I have managed to add it as a DLL modification but I don’t know if it has the same effect.

Also I would like to see how the override is implemented to check how is done right in the compatibility section on bottles in case I need to set more environment variables.