these 2 derivations will be built:
  /nix/store/48cgjsqhyssis807nwqsmb7zdid8r9yi-nixos-test-driver-pgjwt.drv
  /nix/store/1qyx2jhg6n72l6gx8ndyaq0p4gly6k77-vm-test-run-pgjwt.drv