warning: unneeded `return` statement
 --> azalea/build.rs:9:18
  |
9 |         Ok(_) => return, // nightly
  |                  ^^^^^^
  |
  = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
  = note: `#[warn(clippy::needless_return)]` on by default
help: replace `return` with a unit value
  |
9 |         Ok(_) => (), // nightly
  |                  ~~