these 6 derivations will be built:
  /nix/store/b48dbzqfxcch5s7c1lhqfbslpgi0f4dv-Cargo.toml.drv
  /nix/store/dm1kndqzg602ka9nsvcns6kxwqjgxa4q-vendor-registry.drv
  /nix/store/kbbx3193gvr6jr9g40aa2i03k339k511-vendor-cargo-deps.drv
  /nix/store/rj5ysi2a2x1fjl31sgz1ywgzfzm5iv6b-source.drv
  /nix/store/xh36pqh91kyiapwyx6cvn9mnd4pj0wpc-herdr-eternal-deps-0.1.0.drv
  /nix/store/dnq6d7ajamyvg0lnipv2310yxcsp11sp-herdr-eternal-test-0.1.0.drv