these 2 derivations will be built:
  /nix/store/7ibg9wy3s231v1cq9zdnf8m3wvamjx2p-nixos-test-driver-pg_partman.drv
  /nix/store/7b809fy8hfa4c5w8q3qm10cdpaphls0b-vm-test-run-pg_partman.drv