diff --git a/pkgs/development/python-modules/mcp/default.nix b/pkgs/development/python-modules/mcp/default.nix
index f804c12f5349..6d6ae50b6d82 100644
--- a/pkgs/development/python-modules/mcp/default.nix
+++ b/pkgs/development/python-modules/mcp/default.nix
@@ -44,6 +44,7 @@ buildPythonPackage (finalAttrs: {
   pname = "mcp";
   version = "1.27.0";
   pyproject = true;
+  __structuredAttrs = true;
 
   src = fetchFromGitHub {
     owner = "modelcontextprotocol";