{"ast_node_type":"other","tokens":[{"end":54,"kind":"keyword","start":0,"text":"env.insert(\"RUSTDOCFLAGS\".to_string(),"}]}
    env.insert("RUSTDOCFLAGS".to_string(), rustflags);
    let rustflags = env.get("RUSTFLAGS").cloned().unwrap_or_default();
    let mut cargo_command: Vec<&dyn AsRef<OsStr>> = vec![&"cargo", &toolchain_arg];