these 2 derivations will be built:
  /nix/store/ks9qbqcxr2yx02hrzxbqjp3a74nvbic5-nixos-test-driver-index_advisor.drv
  /nix/store/vb7ai3cnjvwd3y81bzmqyfddnplwcngr-vm-test-run-index_advisor.drv