diff --git a/pkgs/development/python-modules/pysptk/default.nix b/pkgs/development/python-modules/pysptk/default.nix
index c1a609a294fc..c8d0b410e822 100644
--- a/pkgs/development/python-modules/pysptk/default.nix
+++ b/pkgs/development/python-modules/pysptk/default.nix
@@ -15,6 +15,8 @@ buildPythonPackage (finalAttrs: {
   version = "1.0.1";
   format = "setuptools";
 
+  __structuredAttrs = true;
+
   src = fetchPypi {
     inherit (finalAttrs) version;
     pname = "pysptk";