uhm, grunt? <a href="http://gruntjs.com/" rel="nofollow">http://gruntjs.com/</a> It's exactly a "brand-new build system — reimagined from the ground up — that leverages all of the power of node, npm and their thriving ecosystems". I use it on several projects and it works really well. It's probably my favorite build system across all languages for its simplicity, extensibility, and utility.