these 6 derivations will be built:
  /nix/store/yny5hmhwsq6r93wa08kzf5yqzghy5l5q-vendor-registry.drv
  /nix/store/5c0pas42xigjh23dplszdg6hz7ip2l5l-vendor-cargo-deps.drv
  /nix/store/852l35axji13n9p8wqff851w7yg9a47i-Cargo.toml.drv
  /nix/store/vzyisc2yv0q604mib5095ywpwfrcapw3-source.drv
  /nix/store/1vwxp7ranfcmxm9msmg93gd01bn5z91c-herdr-eternal-deps-0.1.0.drv
  /nix/store/10r9rwb7hiyhc9zgvgwvkyn5kn6i6inz-herdr-eternal-test-0.1.0.drv