TypeError [ERR_INVALID_CALLBACK]: Callback must be a function
at maybeCallback (fs.js:136:9)
at Object.writeFile (fs.js:1179:14)
at Object.done (/Users/vt/Documents/im/renderersCompiler.js:18:8)
at /Users/vt/Documents/im/node_modules/jsdom/lib/jsdom.js:259:18
at process.internalTickCallback (internal/process/next_tick.js:70:11
I recommend you to use node 6 lts. Does it work with that? I adjusted the wiki now as there were many fails with higher versions. Thanks for reporting!