these 5 derivations will be built:
  /nix/store/p5f7kn5l97m1zaxh00yzg729f1c85acm-vendor-registry.drv
  /nix/store/1p44jz67jqdg99agwpl5pma7462q4r69-vendor-cargo-deps.drv
  /nix/store/1qs7qa5krw0gr3cs97xnchfaimyv2kp0-source.drv
  /nix/store/c1d4y9jxwhm4zq349vcfw2cl4npwl7bb-herdr-eternal-deps-0.1.0.drv
  /nix/store/b66npybnjypr6r2xbvrfbpak8kwqkas6-herdr-eternal-0.1.0.drv