these 2 derivations will be built:
  /nix/store/i05l90cdiqfqfmfh6wcm9kvdqf0n0x3j-nixos-test-driver-pgrouting.drv
  /nix/store/id63wn2h85zisfwxlm759v3mq78lm8lq-vm-test-run-pgrouting.drv