these 6 derivations will be built:
  /nix/store/cvzqx0gi3nw3ih852a3ycqrdnk3jgmi7-vendor-registry.drv
  /nix/store/3xwm5a5ngz8y18lmp760a7i9xgvrsc3m-vendor-cargo-deps.drv
  /nix/store/k2sv5d5zsamj57hqd2vb8n37ycsq32s6-Cargo.toml.drv
  /nix/store/wsrr5vq5amyrj6wznpn4rnf5p6397hi2-source.drv
  /nix/store/8z3z89hd5k795c7pzs578fdvwjlz1p8q-herdr-eternal-deps-0.1.0.drv
  /nix/store/fzbjvbl4m69y347glggyf0ipkw64qm2f-herdr-eternal-test-0.1.0.drv