these 7 derivations will be built:
  /nix/store/vyzzgdqkhjw5pbrp64kfg3y7xmj6pxf4-nixos-system-server-test.drv
  /nix/store/gby87myl3rrnrdbvjrb7lhm4j82p5lhf-nixos-system-server-test.drv
  /nix/store/0fy00g5la130drfgr6dqha88j3lw54k0-closure-info.drv
  /nix/store/8pc2hmgj0vz149pldma5ph3vb0cxgyzi-run-nixos-vm.drv
  /nix/store/w01871d1ar8r6hl5m6fwpwk8vkqc3j8j-nixos-vm.drv
  /nix/store/v71wwh7rmp48pivijqcaqz8x4srs3myn-nixos-test-driver-index_advisor.drv
  /nix/store/ybl6b203ihfd26sk27mg1g5g9lc5xcn1-vm-test-run-index_advisor.drv