Gulp + React + Browserify + 6to5

gistfile1.js

var gulp = require('gulp');
var browserify = require('browserify');
var reactify = require('reactify');
var source = require('vinyl-source-stream');
var to5ify = require('6to5ify');

gulp.task('scripts', function() {
	browserify({
		insertGlobals: true,
		entries: ['./src/index.jsx'],
		transform: ['reactify'],
		extensions: ['.jsx']
	})
	.transform(to5ify)
	.bundle()
	.pipe(source('index.js'))
	.pipe(gulp.dest('./dist'));
});

gulp.task('watch', function() {
	gulp.watch('./src/index.jsx', ['scripts']);
});

gulp.task('default', ['watch']);

  "devDependencies": {
    "6to5ify": "^3.1.2",
    "browserify": "^8.1.1",
    "gulp": "^3.8.10",
    "reactify": "^1.0.0",
    "vinyl-source-stream": "^1.0.0"
  }