{"ast_node_type":"variable","tokens":[{"end":75,"kind":"keyword","start":0,"text":"let"}]}
    let mut components = components.split_whitespace().collect::<Vec<_>>();
    let components = output(Command::new(&llvm_config).arg("--components"));
    components.retain(|c| OPTIONAL_COMPONENTS.contains(c) || REQUIRED_COMPONENTS.contains(c));