SSR with react-router@1.0.0-beta4

server.es6.js

// That variant actually works with 1.0.0-beta4
// Link to the previous (1.0.0-beta3) version: 
// https://github.com/cdebotton/react-universal/blob/master/src/server.js#L49

import createLocation from 'history/lib/createLocation';
import createHistory from 'history/lib/createMemoryHistory';
import ReactDOM from 'react-dom/server';
import {Router} from 'react-router';
import Layout from './views/Layout';
import Application from './containers/Application';


app.use(function* render() {
    const stats = require('../build/webpack-stats.json');
    const routes = require('../build/routes-compiled');

    const history = createHistory();
    const location = createLocation(this.req.url);

    const markup = ReactDOM.renderToString(
        <Application>
            <Router history={history} location={location} routes={routes} />
        </Application>
    );

    const html = ReactDOM.renderToStaticMarkup(
        <Layout
            markup={markup}
            payload={Application.getState()}
            {...stats} />
    );

    this.body = `<!doctype>\n${html}`;
});

After reading the code of history I'm pretty sure the location prop on Router doesn't exist anymore. You have to do createMemoryHistory(this.req.url) or history.pushState(null, this.req.url)