these 3 derivations will be built:
  /nix/store/r78w93mci3m1hnyn8pbfg6q4ls2jzp1q-source.drv
  /nix/store/bjq5iqh7p2vas6v9q7j86lyqdykdnv0z-plannotator-0.27.21.drv
  /nix/store/xs9598ayqdwa6zm1c8az3qmkwzzh1xk9-check-plannotator.drv