Problem, everything gets compiled, files not even required.

tsconfig.json

{
    "compilerOptions": {
        "module": "commonjs",
        "target": "es6",
        "noImplicitAny": false,
        "sourceMap": true,
        "alwaysStrict": true,
        "experimentalDecorators": true,
        "moduleResolution": "node",
        "jsx": "react"
    },
    "typeAcquisition": {
        "enable": true
    },
    "exclude": [
        "node_modules"
    ]
}

webpack.config.js

var fs      = require('fs');
var webpack = require('webpack');

module.exports = {
  entry: './src/test/webtask',
  output: {
    filename: 'main.js'
  },
  resolve: {
    // Add `.ts` and `.tsx` as a resolvable extension.
    extensions: ['.ts', '.tsx', '.js']
  },
  module: {
    rules: [
      {
        test: /\.tsx?$/,
        use: {
          loader: 'awesome-typescript-loader',
        }
      }
    ]
  },
};

webtask.ts

import Webtask from 'webtask-tools';
import * as Express from 'express';

const app : Express.Application = Express();

app.get('/', function index (req: Express.Request, res: Express.Response) : void {
    res.json({
        "hello": "world"
    });
});

export default Webtask.fromExpress(app);