storybook: dotenv-webpack missing

I upgraded to the latest @storybook/core and @storybook/react and now get:

info @storybook/react v5.2.0-beta.19
info 
info => Loading static files from: /Users/cyber/dev/jb/qc/qc-frontend/public .
info => Loading presets
WARN   Failed to load preset: "/Users/cyber/dev/jb/qc/qc-frontend/node_modules/@storybook/react/node_modules/@storybook/core/dist/server/manager/manager-preset.js"
ERR! Error: Cannot find module 'dotenv-webpack'
ERR! Require stack:
ERR! - /Users/cyber/dev/jb/qc/qc-frontend/node_modules/@storybook/react/node_modules/@storybook/core/dist/server/manager/manager-webpack.config.js
ERR! - /Users/cyber/dev/jb/qc/qc-frontend/node_modules/@storybook/react/node_modules/@storybook/core/dist/server/manager/manager-preset.js
ERR! - /Users/cyber/dev/jb/qc/qc-frontend/node_modules/@storybook/react/node_modules/@storybook/core/dist/server/presets.js
ERR! - /Users/cyber/dev/jb/qc/qc-frontend/node_modules/@storybook/react/node_modules/@storybook/core/dist/server/config.js
ERR! - /Users/cyber/dev/jb/qc/qc-frontend/node_modules/@storybook/react/node_modules/@storybook/core/dist/server/build-static.js
ERR! - /Users/cyber/dev/jb/qc/qc-frontend/node_modules/@storybook/react/node_modules/@storybook/core/server.js
ERR! - /Users/cyber/dev/jb/qc/qc-frontend/node_modules/@storybook/react/dist/server/index.js
ERR! - /Users/cyber/dev/jb/qc/qc-frontend/node_modules/@storybook/react/bin/index.js
ERR!     at Function.Module._resolveFilename (internal/modules/cjs/loader.js:625:15)
ERR!     at Function.Module._load (internal/modules/cjs/loader.js:527:27)
ERR!     at Module.require (internal/modules/cjs/loader.js:683:19)
ERR!     at require (internal/modules/cjs/helpers.js:16:16)
ERR!     at Object.<anonymous> (/Users/cyber/dev/jb/qc/qc-frontend/node_modules/@storybook/react/node_modules/@storybook/core/dist/server/manager/manager-webpack.config.js:14:45)
ERR!     at Module._compile (internal/modules/cjs/loader.js:776:30)
ERR!     at Object.Module._extensions..js (internal/modules/cjs/loader.js:787:10)
ERR!     at Module.load (internal/modules/cjs/loader.js:643:32)
ERR!     at Function.Module._load (internal/modules/cjs/loader.js:556:12)
ERR!     at Module.require (internal/modules/cjs/loader.js:683:19)
ERR!     at require (internal/modules/cjs/helpers.js:16:16)
ERR!     at Object.<anonymous> (/Users/cyber/dev/jb/qc/qc-frontend/node_modules/@storybook/react/node_modules/@storybook/core/dist/server/manager/manager-preset.js:21:46)
ERR!     at Module._compile (internal/modules/cjs/loader.js:776:30)
ERR!     at Object.Module._extensions..js (internal/modules/cjs/loader.js:787:10)
ERR!     at Module.load (internal/modules/cjs/loader.js:643:32)
ERR!     at Function.Module._load (internal/modules/cjs/loader.js:556:12)
ERR!  Error: Cannot find module 'dotenv-webpack'