How to add custom Gradle configuration to classpath in IDEA 13 Follow

Hi

I'm trying to switch a Gradle build from Eclipse to IDEA 13.0.1 Community Edition. Apparantly, the Gradle Idea plugin should not be used anymore, however Idea will not recognize my custom "provided" configuration:

configurations{
     provided { transitive = true }
}

sourceSets {
     // make the custom dependencies visible for other tasks and plugins
     main.compileClasspath += configurations.provided
     test.compileClasspath += configurations.provided
}

Any ideas how I can tell IDEA to add those provided libraries to the classpath automatically?