these 2 derivations will be built:
  /nix/store/6rgmifp9kx7i3csh7r6m0c2m9ah50bky-nixos-test-driver-plpgsql_check.drv
  /nix/store/p043129qz4xz98xfs3ry9r4dq09jj343-vm-test-run-plpgsql_check.drv