diff --git a/pkgs/development/python-modules/aiosmtplib/default.nix b/pkgs/development/python-modules/aiosmtplib/default.nix
index 774f8f588672..c0ed7578eaf0 100644
--- a/pkgs/development/python-modules/aiosmtplib/default.nix
+++ b/pkgs/development/python-modules/aiosmtplib/default.nix
@@ -18,6 +18,7 @@ buildPythonPackage (finalAttrs: {
   pname = "aiosmtplib";
   version = "5.1.3";
   pyproject = true;
+  __structuredAttrs = true;
 
   src = fetchFromGitHub {
     owner = "cole";