these 2 derivations will be built:
  /nix/store/jyqdkasyycs2r6rdph1xvn4aqz8mqg20-nixos-test-driver-site.drv
  /nix/store/my63bw2pgpgdlz2wkfzc0z8v2y7w8mx7-vm-test-run-site.drv