diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 13f0e8ca3d0..c43c88c0016 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -6467,6 +6467,7 @@ let
     inherit fetchurl stdenv pkgconfig perl zip libjpeg libpng zlib cairo
       python dbus dbus_glib freetype fontconfig bzip2 xlibs alsaLib;
     inherit (gnome) libIDL libgnomeui gnomevfs gtk pango;
+    inherit (pythonPackages) ply;
   });
 
   icecat3Xul =