node-gyp is a cross-platform command-line tool written in Node.js for compiling native addon modules for Node.js. It bundles the gyp project used by the Chromium team and takes away the pain of dealing with the various differences in build platforms. It is the replacement to the node-waf program which is removed for node v0.8. If you have a native addon for node that still has a wscript file, then you should definitely add a binding.gyp file to support the latest versions of node.Multiple target versions of node are supported (i.e. 0.8, ..., 4, 5, 6, etc.), regardless of what version of node is actually installed on your system (node-gyp downloads the necessary development files or headers for the target version).