these 2 derivations will be built:
  /nix/store/frrjz5dphb9z0bby26r6nrsw5wvqwwll-nixos-test-driver-hypopg.drv
  /nix/store/kw5k8akkkkxz2knr38gg651abi292w9f-vm-test-run-hypopg.drv