diff --git a/nix/packages.nix b/nix/packages.nix
index dbf6356..ffe367b 100644
--- a/nix/packages.nix
+++ b/nix/packages.nix
@@ -4,9 +4,10 @@
     let
       pkgs = inputs.nixpkgs.legacyPackages.${system};
     in {
-      default = inputs.hermes-agent.packages.${system}.default;
-
-      speckl-config = pkgs.writeTextDir "speckl-config.yaml" ''
+      # Hermes agent with messaging platform support (Discord, Slack, Telegram)
+      default = inputs.hermes-agent.packages.${system}.default.override {
+        extraDependencyGroups = [ "messaging" ];
+      }; = pkgs.writeTextDir "speckl-config.yaml" ''
         # Speckl SME — generated config
         # Override via services.hermes-speckl.settings
         model: