these 2 derivations will be built:
  /nix/store/yclsahx31zf9g6gc2jxk74ar77lh2kwm-nixos-test-driver-pgjwt.drv
  /nix/store/22z9s72yl5a64d6q6n5vwqw1qixwcf89-vm-test-run-pgjwt.drv