these 3 derivations will be built:
  /nix/store/d96z1dv1dnilqjh9ldpqx8afii0fima1-source.drv
  /nix/store/ciqr4g954j17csyii5qlrx6kfw304hhx-herdr-eternal-deps-0.1.0.drv
  /nix/store/sf99n8nfbz92wj7js1ax3bdpxhyia35b-herdr-eternal-test-0.1.0.drv