these 2 derivations will be built:
  /nix/store/n3qwxq3zj2vb9cpjq28y1lkh2acch36x-nixos-test-driver-hypopg.drv
  /nix/store/qas2ilpgs99mfpjkvqgk698zp3y4mjmz-vm-test-run-hypopg.drv