diff --git a/pkgs/by-name/op/opensnitch-ui/package.nix b/pkgs/by-name/op/opensnitch-ui/package.nix
index 74440f506d7b3..094625d846de5 100644
--- a/pkgs/by-name/op/opensnitch-ui/package.nix
+++ b/pkgs/by-name/op/opensnitch-ui/package.nix
@@ -34,6 +34,7 @@ python311Packages.buildPythonApplication rec {
   propagatedBuildInputs = with python311Packages; [
     grpcio-tools
     notify2
+    packaging
     pyasn
     pyinotify
     pyqt5