these 2 derivations will be built:
  /nix/store/76yi5jh6v53avhrh40mmli9jgbsj22k5-nixos-test-driver-pgjwt.drv
  /nix/store/kafxq12kdh9bsrp8fvwvjakma92nb0jl-vm-test-run-pgjwt.drv