How to fix "Cannot resolve symbol" in a library module without flavors in Android Studio?

This is my project setup:

• I have 3 modules in an Android Studio project (app, feature & theme):

  

• Important: Only :app & :theme modules have flavors. :feature module has no flavors.

  flavorDimensions("product")
  
  productFlavors {
      paid { }
      demo { }
      free { }
  }
  

  This makes Build Variants look this way:

  

• This is the dependency graph:

  

So:

• The :app module can see all the resources in :theme module because all Build Variants match

• Since the :feature module has no flavors, I have declared the :theme dependency this way:

  implementation project(configuration: 'default', path: ':theme')

  this makes the project to build successfully ✅ ✅ ✅

• However, the :feature module can't see resources defined in the :theme module.

• If I remove configuration: 'default' from the dependency declaration, I get this error:

  ERROR: Unable to resolve dependency for ':feature@debug/compileClasspath': Could not resolve project :theme.
  

• This is a layout file in the :feature module:

  

• The product_name String is declared in the :theme module in different directories matching the flavor names

The question is:

How do I make the :feature module to recognize the resources declared in the :theme module without having to declare flavors in the :feature module?