these 2 derivations will be built:
  /nix/store/636hixz5l71q42bd0hz6wg3s5h3977h5-nixos-test-driver-hypopg.drv
  /nix/store/a0556bhqjnzrlmyszfk4dmrl8fcj5c6v-vm-test-run-hypopg.drv