these 2 derivations will be built:
  /nix/store/mwwvj3bvv1nd02nzizfx9fkfw9cgz4fk-nixos-test-driver-pgrouting.drv
  /nix/store/41m3qybkls1q2p9kv564wd2aymadj12i-vm-test-run-pgrouting.drv