diff --git a/pkgs/applications/graphics/freecad/default.nix b/pkgs/applications/graphics/freecad/default.nix
index cb37a81d9e1a..ebf8b9ee6061 100644
--- a/pkgs/applications/graphics/freecad/default.nix
+++ b/pkgs/applications/graphics/freecad/default.nix
@@ -33,6 +33,7 @@ in mkDerivation rec {
   ] ++ (with pythonPackages; [
     matplotlib pycollada shiboken2 pyside2 pyside2-tools pivy python boost
     GitPython # for addon manager
+    scipy pyyaml # (at least for) PyrateWorkbench
   ]);
 
   cmakeFlags = [