these 3 derivations will be built:
  /nix/store/9qyx8qpajqr90drljbkrz9v96ljg97jr-source.drv
  /nix/store/qryi8qwa24qyvz3mp2qv2wdsqp08517d-hax-0.6.0.drv
  /nix/store/vi1wgnckzdfvmrvfz5aki90c5idzpa59-check-hax.drv