these 2 derivations will be built:
  /nix/store/czz45raz1hrrcps433yqf6kf5z6rklyq-hol-guard-3.16.5.drv
  /nix/store/2is5lvqb6a62r3i835nh7j9j3p2mzy4m-check-hol-guard.drv