Next.js 8.0.1 – babel not compiling properly

A simple test repo to reproduce issue #6273 in Next.js 8.0.1.

npm run dev/yarn dev will start a Next.js application with a custom express server. Accessing http://localhost:3000 will result in a 500 Internal Server Error and the following stack trace:

(...)next8-babel-issue/node_modules/@babel/runtime-corejs2/helpers/esm/typeof.js:1
(function (exports, require, module, __filename, __dirname) { import _Symbol$iterator from "../../core-js/symbol/iterator";
                                                                     ^^^^^^^^^^^^^^^^

SyntaxError: Unexpected identifier
(...)

Changing presets: ['next/babel'] to presets: [['next/babel', { 'transform-runtime': { useESModules: false } }]] solves the issue.