these 4 derivations will be built:
  /nix/store/jas84z98nmzy5w15p8gpxrfl24w74nkf-vendor-registry.drv
  /nix/store/nknzigg21lmwksclq51y1vp7m80mc247-vendor-cargo-deps.drv
  /nix/store/h1s0fmq501h1js0qsxyqdy3sgjs2g67j-herdr-eternal-deps-0.1.0.drv
  /nix/store/8siy04j87v9d3mw9wj2a8ag7sr2669vz-herdr-eternal-test-0.1.0.drv