if err.kind() == std::io::ErrorKind::NotFound {
        writeln!(std::io::stderr(), "No such subcommand: {:?}", cmd).unwrap_or(());
    } else {
        writeln!(std::io::stderr(), "Error while running {:?}: {}", cmd, err).unwrap_or(());

    match err.kind() {
        std::io::ErrorKind::NotFound | std::io::ErrorKind::PermissionDenied => {
            writeln!(std::io::stderr(), "No such subcommand: {:?}", cmd).unwrap_or(())
        }
        _ => writeln!(std::io::stderr(), "Error while running {:?}: {}", cmd, err).unwrap_or(()),