these 2 derivations will be built:
  /nix/store/1c17g02i2yndi8z1zsxfdyzrjp0b0kzv-nixos-test-driver-index_advisor.drv
  /nix/store/m8x2mcnqxi76912l8c7vbnl55gssa4sn-vm-test-run-index_advisor.drv