these 2 derivations will be built:
  /nix/store/nlbck147137fw5z04p2acjwrp3qdxqzh-nixos-test-driver-pg_partman.drv
  /nix/store/4b6p8wlkbj4zlv7h5ksvksz1vd7p9r79-vm-test-run-pg_partman.drv