these 2 derivations will be built:
  /nix/store/kchczz1p1kdm5k0xwrzzs1rv46rjl9gx-nixos-test-driver-pgjwt.drv
  /nix/store/nizqwdq9qb62pnf8my6chbs63wpbzs2l-vm-test-run-pgjwt.drv