True, but if anything, a build.rs is a lot easier for me to read and understand (or even modify) if needed because I already know Rust. With something like cmake, the build configuration is an entirely separate language the one I'm actually working in, and I haven't seen a project that doesn't have at least some amount of custom configuration in it. Starting up a cargo project literally doesn't require putting anything in the Cargo.toml that doesn't exist after you run `cargo new`.