Reference style from NuGet package

I have a NuGet package where a style was defined.

I installed it in my new project and I want to use it as a parent for the main theme.

I tried many formattings (with and without @, :style/, Resources.Style etc.) but the error is always the same:
Error retrieving parent for item: No resource found that matches the given name '<theme name here>'

Is this doable ? If so, how ?

Thanks,
J.