error: `format!` in `println!` args
  --> build.rs:41:5
   |
41 | /     println!(
42 | |         "{}",
43 | |         format!("cargo:rerun-if-changed={}", &out_path.display())
44 | |     );
   | |_____^
   |
   = help: combine the `format!(..)` arguments with the outer `println!(..)` call
   = help: or consider changing `format!` to `format_args!`
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#format_in_format_args
   = note: `-D clippy::format-in-format-args` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(clippy::format_in_format_args)]`