these 4 derivations will be built:
  /nix/store/naa0b5yr4x91vn0bvbq0l6bm94a9glqp-test-script.drv
  /nix/store/bd77bdanwgif5frhqiyqapgm7g547k92-driverConfiguration.json.drv
  /nix/store/9l53f5wgmy9vkjdpkwl53wmg3f92a76w-nixos-test-driver-pgrouting.drv
  /nix/store/zn5py16yh6hkf3zjfzzs8s8zg0l7kkc2-vm-test-run-pgrouting.drv