these 2 derivations will be built:
  /nix/store/fp66b6kziryghcn6zq6isx6j3bnza4ms-nixos-test-driver-pgrouting.drv
  /nix/store/sk40hcs6v4vdbc0wijrwj2snswa5rplw-vm-test-run-pgrouting.drv