these 2 derivations will be built:
  /nix/store/8fpfxb91aaqj67ddhsfcm1q1nxa97gjx-nixos-test-driver-plpgsql_check.drv
  /nix/store/yjh55xx75r4i0lray7srccq5bg1k24nn-vm-test-run-plpgsql_check.drv