@storybook/react with webpack 5?

[JasonKleban]

https://storybook.js.org/docs/react/builders/webpack#webpack-5

Storybook builds your project with Webpack 4 by default. If your project uses Webpack 5, you can opt into the Webpack 5 builder by installing the required dependencies (i.e., @storybook/builder-webpack5, @storybook/manager-webpack5) and update your Storybook configuration as follows:

// .storybook/main.js

module.exports = {
  core: {
    builder: 'webpack5',
  },
};

Is this ALL that is required? I'm a little confused. I'm using the @storybook/react stuff and when I (believe I) do as that documentation advises, I still get the same runtime errors and Version: webpack 4.46.0 in the output.

I tried adding @storybook/react-webpack5 alpha, but since our config doesn't specify framework: "react" I don't have an obvious way to adapt it to use this.