Module.nesting for anonymous modules?

Hi list,

I'm trying to get a reference to the module that a method is defined in,
problem being that the module is generated dynamically so is not part of the
AST.

foo = Module.new do
  def m
    Module.nesting
  end
end
=> #<Module:0x28879c4>

c = Class.new { include foo }
=> #<Class:0x287164c>

c.new.m
=> []

Is there any way for a method defined like this to get a reference to its
containing module?