these 4 derivations will be built:
  /nix/store/j71mwrpf16c0z0biq6f2aanfv2nqx7yj-Cargo.toml.drv
  /nix/store/xl02lqircmwqxxkgq2y3lchgjpd608m0-source.drv
  /nix/store/y9q2gjylyzj5h34irdryf6k6ch9bipvb-tincd-deps-0.1.0.drv
  /nix/store/n2pdjza6l451r651xdmd8wzy6sw8nnw6-tincd-0.1.0.drv