10.04/lucid liblua5.1-gnome examples don't work

I have installed liblua5.1-gnome-dev and liblua5.1-gnome-0 packages to try out the gtk bindings for lua.
All of the examples (in /usr/share/doc/liblua5.1-gnome-dev/examples) that I tried fail in the same way. Are they out of date, or is the package missing gtk? I'm running Lucid Lynx 10.04, 32 bit x86 build. Here is an example from "The simplest possible Lua-Gtk application" window.lua:

lua: ./window.lua:5: module 'gtk' not found:
 no field package.preload['gtk']
 no file './gtk.lua'
 no file '/usr/local/share/lua/5.1/gtk.lua'
 no file '/usr/local/share/lua/5.1/gtk/init.lua'
 no file '/usr/local/lib/lua/5.1/gtk.lua'
 no file '/usr/local/lib/lua/5.1/gtk/init.lua'
 no file '/usr/share/lua/5.1/gtk.lua'
 no file '/usr/share/lua/5.1/gtk/init.lua'
 no file './gtk.so'
 no file '/usr/local/lib/lua/5.1/gtk.so'
 no file '/usr/lib/lua/5.1/gtk.so'
 no file '/usr/local/lib/lua/5.1/loadall.so'
stack traceback:
 [C]: in function 'require'
 ./window.lua:5: in main chunk
 [C]: ?