1 files changed, 2 insertions, 0 deletions
diff --git a/pkgs/development/python-modules/sphinxcontrib-plantuml/default.nix b/pkgs/development/python-modules/sphinxcontrib-plantuml/default.nix
index aabc1c49d0c..d6c588c8d02 100644
--- a/pkgs/development/python-modules/sphinxcontrib-plantuml/default.nix
+++ b/pkgs/development/python-modules/sphinxcontrib-plantuml/default.nix
@@ -26,6 +26,8 @@ buildPythonPackage rec {
   # No tests included.
   doCheck = false;
 
+  pythonNamespaces = [ "sphinxcontrib" ];
+
   meta = with lib; {
     description = "Provides a Sphinx domain for embedding UML diagram with PlantUML";
     homepage = "https://github.com/sphinx-contrib/plantuml/";