Merge pull request #265836 from hercules-ci/nixosTests-no-surprises

nixos/testing/nodes: Do allow aliases

nixos/lib/testing/nodes.nix

···
             key = "nodes.nix-pkgs";
             config = optionalAttrs (!config.node.pkgsReadOnly) (
               mkIf (!options.nixpkgs.pkgs.isDefined) {
-                # Ensure we do not use aliases. Ideally this is only set
-                # when the test framework is used by Nixpkgs NixOS tests.
-                nixpkgs.config.allowAliases = false;
                 # TODO: switch to nixpkgs.hostPlatform and make sure containers-imperative test still evaluates.
                 nixpkgs.system = hostPkgs.stdenv.hostPlatform.system;
               }