Cycle.js webpack + babel config

.babelrc

{
  "presets": [
    "es2015"
  ],
  "plugins": [
    "syntax-jsx",
    ["transform-react-jsx", {"pragma": "html"}],
    "transform-function-bind",
    ["babel-root-import", {
      "rootPathSuffix": "client/"
    }],
  ]
}

webpack.config.js

'use strict'

module.exports = {
  entry: './client/index.js',
  output: {
    filename: './client/build/app.dist.js'
  },
  module: {
    loaders: [
      {
        test: /\.jsx?$/,
        exclude: /(node_modules|bower_components)/,
        loader: 'babel-loader',
        query: {
          presets: ['es2015']
        }
      }
    ]
  }
}

Note that 'babel-root-import' was renamed to 'babel-plugin-root-import'