storybook: [6.2.0-beta.0] webpack 5 error /webpack-virtual-modules/

Describe the bug

WARN Unable to close preview build!
  ERR! TypeError: Cannot read property 'data' of undefined
ERR!     at setData (app/node_modules/webpack-virtual-modules/index.js:84:15)
ERR!     at CachedInputFileSystem.finalInputFileSystem._writeVirtualFile (app/node_modules/webpack-virtual-modules/index.js:118:9)
ERR!     at VirtualModulesPlugin.writeModule (app/node_modules/webpack-virtual-modules/index.js:64:24)
ERR!     at app/node_modules/webpack-virtual-modules/index.js:165:14
ERR!     at Array.forEach (<anonymous>)
  ERR!     at afterResolversHook (app/node_modules/webpack-virtual-modules/index.js:164:40)
  ERR!     at Hook.eval [as call] (eval at create (app/node_modules/webpack/node_modules/tapable/lib/HookCodeFactory.js:19:10), <anonymous>:7:1)
    ERR!     at Hook.CALL_DELEGATE [as _call] (app/node_modules/webpack/node_modules/tapable/lib/Hook.js:14:14)
    ERR!     at WebpackOptionsApply.process (app/node_modules/webpack/lib/WebpackOptionsApply.js:571:33)
    ERR!     at createCompiler (app/node_modules/webpack/lib/webpack.js:76:28)
    ERR!     at create (app/node_modules/webpack/lib/webpack.js:113:15)
    ERR!     at webpack (app/node_modules/webpack/lib/webpack.js:137:31)
    ERR!     at Object.f [as get] (app/node_modules/webpack/lib/index.js:37:15)
    ERR!     at Object.start (app/node_modules/@storybook/core-server/dist/cjs/manager/builder.js:86:27)
    ERR!     at async Promise.all (index 1)
    ERR!     at async storybookDevServer (app/node_modules/@storybook/core-server/dist/cjs/dev-server.js:105:28)
    ERR!  TypeError: Cannot read property 'data' of undefined
    ERR!     at setData (app/node_modules/webpack-virtual-modules/index.js:84:15)
    ERR!     at CachedInputFileSystem.finalInputFileSystem._writeVirtualFile (app/node_modules/webpack-virtual-modules/index.js:118:9)
    ERR!     at VirtualModulesPlugin.writeModule (app/node_modules/webpack-virtual-modules/index.js:64:24)
    ERR!     at app/node_modules/webpack-virtual-modules/index.js:165:14
    ERR!     at Array.forEach (<anonymous>)
      ERR!     at afterResolversHook (app/node_modules/webpack-virtual-modules/index.js:164:40)
      ERR!     at Hook.eval [as call] (eval at create (app/node_modules/webpack/node_modules/tapable/lib/HookCodeFactory.js:19:10), <anonymous>:7:1)
        ERR!     at Hook.CALL_DELEGATE [as _call] (app/node_modules/webpack/node_modules/tapable/lib/Hook.js:14:14)
        ERR!     at WebpackOptionsApply.process (app/node_modules/webpack/lib/WebpackOptionsApply.js:571:33)
        ERR!     at createCompiler (app/node_modules/webpack/lib/webpack.js:76:28)
        ERR!     at create (app/node_modules/webpack/lib/webpack.js:113:15)
        ERR!     at webpack (app/node_modules/webpack/lib/webpack.js:137:31)
        ERR!     at Object.f [as get] (app/node_modules/webpack/lib/index.js:37:15)
        ERR!     at Object.start (app/node_modules/@storybook/core-server/dist/cjs/manager/builder.js:86:27)
        ERR!     at async Promise.all (index 1)
        ERR!     at async storybookDevServer (app/node_modules/@storybook/core-server/dist/cjs/dev-server.js:105:28)

To Reproduce

Install 6.2.0 beta in a monorepo with webpack 5, we does not work with target web neither node, below is the main.js config

module.exports = {
  stories: ['../packages/*/src/**/*.stories.@(js|jsx|ts|tsx|mdx)'],
  webpack: (config) => {
    config.target = 'node',
    config.node = {
      __dirname: false,
      __filename: false,
    };

    return config;
  },
  reactOptions: {
    fastRefresh: true,
    strictMode: true,
  },
  typescript: {
    check: false,
    reactDocgen: false,
  },
};

Steps to reproduce the behavior: start-storybook -p 9001 -c .storybook

Expected behavior it should not break

Screenshots the stacktrace is above

Code snippets code snippet above

System

System:
    OS: macOS 11.1
    CPU: (4) x64 Intel(R) Core(TM) i7-5557U CPU @ 3.10GHz
  Binaries:
    Node: 14.15.4 - ~/.nvm/versions/node/v14.15.4/bin/node
    Yarn: 1.22.10 - /usr/local/bin/yarn
    npm: 6.14.11 - ~/.nvm/versions/node/v14.15.4/bin/npm
  npmPackages:
    @storybook/addon-docs: 6.2.0-beta.0 => 6.2.0-beta.0 
    @storybook/addon-options: 6.0.0-alpha.29 => 6.0.0-alpha.29 
    @storybook/react: 6.2.0-beta.0 => 6.2.0-beta.0 
    @storybook/storybook-deployer: 2.8.7 => 2.8.7

Additional context