old_contents: var NwBuilder = require("node-webkit-builder");
  var asap = require("pdenodeify");
  var path = require("path");
  var rimraf = require("rimraf");
  
  module.exports = function(options, buildResult){
  	var nwOptions = {};
  
  	// Convert the options to camelcase
  	Object.keys(options).forEach(function(optName){
  		nwOptions[toCamelcase(optName)] = options[optName];
  	});
  
  	// Set the bundlesPath as a file to use.
  	var files = nwOptions.files || nwOptions.glob || [];
  	files = Array.isArray(files) ? files : [files];
  	if(buildResult && buildResult.configuration &&
  	   buildResult.configuration.bundlesPath) {
  		var bundlesPath = buildResult.configuration.bundlesPath;
  		files.unshift(path.join(bundlesPath, "**/*"));
  	}
  	nwOptions.files = files;
  
  	var nw = new NwBuilder(nwOptions);
  
  	nw.on("log", function(msg){
  		console.error(msg);
  	});
  
  	var buildPromise = asap(rimraf)(nwOptions.buildDir);
  
  	var builder = asap(nw.build.bind(nw));
  	return buildPromise.then(builder);
  };
  
  
  function toCamelcase(str) {
  	return str.replace(/\_+([a-z])/g, function (x, chr) { return chr.toUpperCase(); });
  }
  
new_contents: var NwBuilder = require("node-webkit-builder");
  var asap = require("pdenodeify");
  var path = require("path");
  var rimraf = require("rimraf");
  
  module.exports = function(options, buildResult){
  	var nwOptions = {};
  
  	// Convert the options to camelcase
  	Object.keys(options).forEach(function(optName){
  		nwOptions[toCamelcase(optName)] = options[optName];
  	});
  
  	// Set the bundlesPath as a file to use.
  	var files = nwOptions.files || nwOptions.glob || [];
  	files = Array.isArray(files) ? files : [files];
  	if(buildResult && buildResult.configuration &&
  	   buildResult.configuration.bundlesPath) {
  		var bundlesPath = buildResult.configuration.bundlesPath;
  		var globPath = path.relative(process.cwd(), bundlesPath) + "/**/*";
  		files.unshift(globPath);
  	}
  	nwOptions.files = files;
  
  	var nw = new NwBuilder(nwOptions);
  
  	nw.on("log", function(msg){
  		console.error(msg);
  	});
  
  	var buildPromise = asap(rimraf)(nwOptions.buildDir);
  
  	var builder = asap(nw.build.bind(nw));
  	return buildPromise.then(builder);
  };
  
  
  function toCamelcase(str) {
  	return str.replace(/\_+([a-z])/g, function (x, chr) { return chr.toUpperCase(); });
  }
  
subject: Use path.relative to create the bundles glob