these 2 derivations will be built:
  /nix/store/6dq9hv4f83f7w3lba4vwhjrjhijdn2aq-cargo-vendor-dir.drv
  /nix/store/px4rb7zvrm0d49idvpyjwsyywawdj6vk-nix-wire-0.1.0.drv