allow llm agents to use binary cache

flake.nix

@@ -12,10 +12,7 @@
       inputs.nixpkgs.follows = "nixpkgs";
     };
     import-tree.url = "github:vic/import-tree";
-    llm-agents = {
-      url = "github:numtide/llm-agents.nix";
-      inputs.nixpkgs.follows = "nixpkgs";
-    };
+    llm-agents.url = "github:numtide/llm-agents.nix";
     nix-wrapper-modules = {
       url = "github:BirdeeHub/nix-wrapper-modules";
       inputs.nixpkgs.follows = "nixpkgs";