mod mod1 {
    use ibuilder::*;

    #[derive(IBuilder)]
    pub struct Foo {
        bar: super::mod2::Bar,
    }
}

mod mod2 {
    use ibuilder::*;

    #[derive(IBuilder)]
    pub struct Bar {
        field: i64,
    }
}

fn main() {
    use ibuilder::Buildable;
    let _builder = mod1::Foo::builder();
}