diff --git a/pkgs/development/python-modules/privacyidea/ldap-proxy.nix b/pkgs/development/python-modules/privacyidea/ldap-proxy.nix
index ec87186a4fd..25a81510c7d 100644
--- a/pkgs/development/python-modules/privacyidea/ldap-proxy.nix
+++ b/pkgs/development/python-modules/privacyidea/ldap-proxy.nix
@@ -1,9 +1,12 @@
-{ lib, buildPythonPackage, fetchFromGitHub, twisted, ldaptor, configobj }:
+{ lib, buildPythonPackage, isPy3k, fetchFromGitHub, twisted, ldaptor, configobj }:
 
 buildPythonPackage rec {
   pname = "privacyidea-ldap-proxy";
   version = "0.6.1";
 
+  # https://github.com/privacyidea/privacyidea-ldap-proxy/issues/50
+  disabled = isPy3k;
+
   src = fetchFromGitHub {
     owner = "privacyidea";
     repo = pname;