add this javascript after you load dust.js and it will allow you to reference dot path contexts in nested scopes and globals. see https://github.com/linkedin/dustjs/pull/271 for more details

dust-context.js

//supports dot path resolution, function eval, and searching global paths
Context.prototype.getPath = function(cur, down) {
  var ctx = this.stack,
      len = down.length,      
      tail = cur ? undefined : this.stack.tail; 

  if (cur && len === 0) return ctx.head;
  ctx = ctx.head;
  var i = 0;
  while(ctx && i < len) {
	if (typeof ctx === "function") {
	  //evaluate functions and inspect returned value
      ctx = ctx.apply(this);
  	  if (ctx)
  	    ctx = ctx[down[i]];
    }
	else
	  ctx = ctx[down[i]];

    i++;
    while (!ctx && !cur){
    	if (tail){
    	  ctx = tail.head;
    	  tail = tail.tail;
    	  i=0;
    	} else if (!cur) {
    	  //finally search this.global.  we set cur to true to halt after
      	  ctx = this.global;
      	  cur = true;
    	  i=0;
    	}
    }   
  }
  return ctx;
};