these 2 derivations will be built:
  /nix/store/h1j6zdck5bcyaa8l6zhrbz3jq22lki1k-nixos-test-driver-plpgsql_check.drv
  /nix/store/kzmh11azy7gkijzmcxcl6k8978cfb8fz-vm-test-run-plpgsql_check.drv