diff --git a/pkgs/applications/science/electronics/flatcam/default.nix b/pkgs/applications/science/electronics/flatcam/default.nix
index b8a80c5e9c11..1f6679625ec7 100644
--- a/pkgs/applications/science/electronics/flatcam/default.nix
+++ b/pkgs/applications/science/electronics/flatcam/default.nix
@@ -18,6 +18,7 @@ python3Packages.buildPythonApplication rec {
   propagatedBuildInputs = with python3Packages; [
     matplotlib
     numpy
+    packaging
     pyqt4
     Rtree
     scipy