1 files changed, 2 insertions, 0 deletions
diff --git a/nixpkgs/pkgs/development/python-modules/sphinxcontrib-nwdiag/default.nix b/nixpkgs/pkgs/development/python-modules/sphinxcontrib-nwdiag/default.nix
index 47573ad609a8..de4ebf723bf1 100644
--- a/nixpkgs/pkgs/development/python-modules/sphinxcontrib-nwdiag/default.nix
+++ b/nixpkgs/pkgs/development/python-modules/sphinxcontrib-nwdiag/default.nix
@@ -29,6 +29,8 @@ buildPythonPackage rec {
     "sphinxcontrib.nwdiag"
   ];
 
+  pythonNamespaces = [ "sphinxcontrib" ];
+
   meta = with lib; {
     description = "Sphinx nwdiag extension";
     homepage = "https://github.com/blockdiag/sphinxcontrib-nwdiag";