these 2 derivations will be built:
  /nix/store/fcv8fdr8nxn88g7wwg5wbvmsilws1glx-nixos-test-driver-plpgsql_check.drv
  /nix/store/s2d3m6n9ncy5dsx8i91jlh0mm73vwxd1-vm-test-run-plpgsql_check.drv