zbus::dbus_interface macro assuming zvariant crate

I run the following code from the book in a standalone app:

use std::error::Error;
use zbus::dbus_interface;
use std::convert::TryInto;
  
struct Greeter;
   
#[dbus_interface(name = "org.zbus.MyGreeter1")]
impl Greeter {
    fn say_hello(&self, name: &str) -> String {
        format!("Hello {}!", name)
    }
}  
   
fn main() -> Result<(), Box<dyn Error>> {
    let connection = zbus::Connection::new_session()?;
    let mut object_server = zbus::ObjectServer::new(&connection);
    object_server.at(&"/org/zbus/MyGreeter".try_into()?, Greeter);
    loop {
        if let Err(err) = object_server.try_handle_next() {
            eprintln!("{}", err);
        }
    }
   
}  

and ended up with compiler errors:

error[E0432]: unresolved import `zvariant`
 --> src/main.rs:7:1
  |
7 | #[dbus_interface(name = "org.zbus.MyGreeter1")]
  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ use of undeclared type or module `zvariant`
  |
  = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0433]: failed to resolve: use of undeclared type or module `zvariant`
 --> src/main.rs:7:1
  |
7 | #[dbus_interface(name = "org.zbus.MyGreeter1")]
  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ use of undeclared type or module `zvariant`
  |
  = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0599]: no function or associated item named `signature` found for reference `&str` in the current scope
 --> src/main.rs:7:1
  |
7 | #[dbus_interface(name = "org.zbus.MyGreeter1")]
  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ function or associated item not found in `&str`
  |
  = help: items from traits can only be used if the trait is in scope
  = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)
help: the following trait is implemented but not in scope; perhaps add a `use` for it:
  |
1 | use zvariant::r#type::Type;
  |

error[E0599]: no function or associated item named `signature` found for struct `std::string::String` in the current scope
 --> src/main.rs:7:1
  |
7 | #[dbus_interface(name = "org.zbus.MyGreeter1")]
  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ function or associated item not found in `std::string::String`
  |
  = help: items from traits can only be used if the trait is in scope
  = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)
help: the following trait is implemented but not in scope; perhaps add a `use` for it:
  |
1 | use zvariant::r#type::Type;
  |

error: aborting due to 4 previous errors

Some errors have detailed explanations: E0432, E0433, E0599.
For more information about an error, try `rustc --explain E0432`.
error: could not compile `zbus-test`.

Workaround is adding an explicit dep on zvariant crate but that shouldn't be needed.