these 2 derivations will be built:
  /nix/store/zwaiglalc01ckfn88wsf2kgd78vgijkc-nixos-test-driver-pg_partman.drv
  /nix/store/p7cbzkjpb91bdnhzcj1lvjhyw3dc4qai-vm-test-run-pg_partman.drv