these 2 derivations will be built:
  /nix/store/m3jfdc78rjsbcymgxhd2fl415dqib3ls-nixos-test-driver-plpgsql_check.drv
  /nix/store/3ypa4khr7a2l73h1q41plmnksvhhgr1k-vm-test-run-plpgsql_check.drv