Depends-on bean not found when using Spring Data JPA namespace for custom Impl

I'm using the Spring Data namespace in my application context XML file, and hence I have this declaration:

<jpa:repositories base-package="com.example.repository"
entity-manager-factory-ref="customerEntityManagerFactory"
transaction-manager-ref="customerTransactionManager" />

However, the validation on this declaration gives me a lot of warnings like:
"Depends-on bean 'myEntityRepositoryImpl' not found"

All these warnings are referencing my repository custom implementation classes. If I understand it correctly, here STS is not correctly handling the "magic" behind Spring Data automatic custom implementation processing.