Creating inheritance on revealing modular pattern objects

Creating inheritance on revealing modular pattern objects

I'm trying to create some kind of inheritance between objects:
var foo = (function(){
function doFooStuff(){
console.log(arguments.callee.name);
}
return {
doFooStuff: doFooStuff
}
})();
var bar = (function(){
$.extend(this, foo);
function doBarStuff(){
console.log(arguments.callee.name);
doFooStuff();
}
return {
doBarStuff: doBarStuff,
}
})();
bar.doBarStuff();
bar.doFooStuff(); //<-- Uncaught TypeError:
//Object #<Object> has no method 'doFooStuff'
http://jsfiddle.net/wRXTv/
Why isn't doFooStuff accessible here? Would you recommend another approach
than using $.extend?