Dagger2: Mark external type as singleton

Question

I am depending on an external type (that I don't control) with several constructor args. The constructor is marked with @Inject, but I want to have dagger treat the type as @Singleton.

Is there a way to do this without copying all the constructor args into a @Provides-annotated function?

@Module
interface MyModule {

    /** Is this the only way? */
    @Provides @Singleton
    static ExternalType makeSingleton(
        ExternalDepA a, ExternalDepB b, ExternalDepC c,
        ExternalDepD d, ExternalDepE e, ExternalDepF f) {

        return new ExternalType(a, b, c, d, e, f);
    }
}

---

Update: The following doesn't work either; first, @Binds is for interface-to-implementation binding (as @YavorMitev also points out in the comments); second it produces a circular dependency error.

@Module
interface ThisDoesNotWork {

    /**  BAD */
    @Binds @Singleton ExternalType makeSingleton(ExternalType external);
}