Merge pull request #221317 from hercules-ci/cleanup-test-nixops-include-build-deps

nixosTests.nixops.unstable.legacyNetwork: Use system.includeBuildDependencies

nixos/tests/nixops/default.nix

@@ -30,12 +30,10 @@ let
         virtualisation.additionalPaths = [
           pkgs.hello
           pkgs.figlet
-
-          # This includes build dependencies all the way down. Not efficient,
-          # but we do need build deps to an *arbitrary* depth, which is hard to
-          # determine.
-          (allDrvOutputs nodes.server.config.system.build.toplevel)
         ];
+
+        # TODO: make this efficient, https://github.com/NixOS/nixpkgs/issues/180529
+        system.includeBuildDependencies = true;
       };
       server = { lib, ... }: {
         imports = [ ./legacy/base-configuration.nix ];