diff --git a/pkgs/development/python-modules/WSME/default.nix b/pkgs/development/python-modules/WSME/default.nix
index c1c6395ab25..50e90ded762 100644
--- a/pkgs/development/python-modules/WSME/default.nix
+++ b/pkgs/development/python-modules/WSME/default.nix
@@ -1,6 +1,7 @@
 { lib
 , buildPythonPackage
 , fetchPypi
+, pythonAtLeast
 , pbr
 , six
 , simplegeneric
@@ -23,6 +24,8 @@ buildPythonPackage rec {
   pname = "WSME";
   version = "0.10.0";
 
+  disabled = pythonAtLeast "3.9";
+
   src = fetchPypi {
     inherit pname version;
     sha256 = "965b9ce48161e5c50d84aedcf50dca698f05bf07e9d489201bccaec3141cd304";