Dagger can not find classes generated by other annotation processor

I have written a simple Annotation Processor (just for fun) that will generate some boilerplate code that I have been writing in my previous project. It actually generates a module like following by collecting annotations on Activity classes

@Module
abstract class ActivityInjectorModule {
  @ContributesAndroidInjector
  abstract fun providesMain2Activity(): Main2Activity

  @ContributesAndroidInjector
  abstract fun providesMainActivity(): MainActivity
}

However, when I run it with dagger, dagger can't seem to find classes generated by my annotation processor. Although, class is generated and present in generated directory, I can use it in my source code but on compilation, dagger produces the following exception. Any expert suggestion?

error: cannot find symbol
@dagger.Component(modules = {dagger.android.AndroidInjectionModule.class, com.mallaudin.daggietest.di.AppModule.class, ActivityInjectorModule.class})
                                                                                                                       ^
  symbol: class ActivityInjectorModule

This is the main app component.

@Singleton
@Component(
    modules = [
        AndroidInjectionModule::class,
        AppModule::class,
        ActivityInjectorModule::class
    ]
)
interface AppComponent : AndroidInjector<App> {


    @Component.Builder
    interface Builder {

        fun addContext(@BindsInstance ctx: Context): Builder

        fun build(): AppComponent
    }
}

ActivityInjectorModule class is generated by annotation processor and exists in the generated directory.

Application class

class App : DaggerApplication() {
    override fun applicationInjector(): AndroidInjector<out DaggerApplication> {
        return DaggerAppComponent.builder().addContext(this).build()
    }
}

Everything works perfectly, if I create the generated class myself. Somehow on compile time, dagger is unable to find the class when generated by my annotation processor.

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