Avoiding ".gradle" folder creation under project folder structure

Hey all,

TL;DR

How do I make sure that IDEA will not create the `.gradle` folder under the project's folder structure?

Background

I'm trying to stop gradle from writing temporary files under the project's folder structure (i.e: the `build` & `.gradle` folders).

Getting rid of the `build` folder was easy.

But getting rid of the `.gradle` folder is trickier.
I changed the `gradlew` and `gradlew.bat` scripts under the project to invoke gradle using: `--project-cache-dir=<some folder outside of the project>`.

When I execute `gradlew` from the terminal, everything works fine (the cache is written to the desired location outside of the project).
But when IDEA runs gradle (either manually or via auto import) the `.gradle` folder keeps coming back.

Shouldn't IDEA use the `gradlew` scripts under the project root to invoke gradle when it's configured with `use default gradle wrapper`?
What am I missing here?

Configuration

IDEA gradle configuration (Using IDEA version: 2018.1.6 CE):

Thanks!

Shai.