these 4 derivations will be built:
  /nix/store/j6ia9yz16126a167jmf7hraakhkfcfiz-vendor-cargo-deps.drv
  /nix/store/jixqib7a0rsas4h4gyb85jimnj5ry0bx-source.drv
  /nix/store/s3smanhra7rpl3p820z61ng5zclycfpa-tincd-deps-0.1.0.drv
  /nix/store/5l340928nr36vjz6zj0pv4h3qwkmfqmq-tincd-test-0.1.0.drv