these 2 derivations will be built:
  /nix/store/l23r2rzdryqx296q3r8ij6y7r5ra0p49-nixos-test-driver-plpgsql_check.drv
  /nix/store/p47kr23gljsp5br7q7if389xnw63fdi5-vm-test-run-plpgsql_check.drv