```
    let make_output = std::process::Command::new("make")
        .current_dir("project_dir")
        .status()
        .expect("Failed to run 'make'");
    if !make_output.success() {
        panic!("External C project build failed");
    }
```
I've tried this but I don't see where the output from the build ends up, not sure if this is they normal way to approach this.