these 6 derivations will be built:
  /nix/store/8insrs9c4ai99wdiigmpb6llap5gp34n-nixos-system-server-test.drv
  /nix/store/wh1gwxflccxxhnvj2cb8hv5i7xkl07s8-closure-info.drv
  /nix/store/lfpdpqx8swhk4whvlh8gmkaflqw08ahd-run-nixos-vm.drv
  /nix/store/w5y67sgh34vfzd215qvnfzw08xs8jqm9-nixos-vm.drv
  /nix/store/g6y0hkv55l18hvmplz52qqsl8r8p9nq1-nixos-test-driver-index_advisor.drv
  /nix/store/hcv8mv8hqpl9hlscqhvdzp0z9hakk1fm-vm-test-run-index_advisor.drv