[Bug]: Storybook does not work with SvelteKit

[jerrythomas]

Describe the bug

Storybook does not run or build with a starter project created using SvelteKit sv create

• Same problem occurs in js and ts mode.

Reproduction link

https://github.com/jerrythomas/repro-sveltekit-storybook/tree/main

Reproduction steps

• create repo using npx sv create
  • select option to include storybook demo
• pnpm storybook

pnpm storybook

> [email protected] storybook /Users/Jerry/Developer/svelte-kit-js
> storybook dev -p 6006

@storybook/core v8.4.7

SB_CORE-SERVER_0002 (CriticalPresetLoadError): Storybook failed to load the following preset: ./.storybook/main.js.

Please check whether your setup is correct, the Storybook dependencies (and their peer dependencies) are installed correctly and there are no package version clashes.

If you believe this is a bug, please open an issue on Github.

SB_CORE-SERVER_0002 (CriticalPresetLoadError): Storybook failed to load the following preset: ./node_modules/.pnpm/@[email protected]_@[email protected][email protected]_prettier@3._6qdorkd3udyipaxdzmyhkuxaka/node_modules/@storybook/addon-svelte-csf/dist/preset.js.

Please check whether your setup is correct, the Storybook dependencies (and their peer dependencies) are installed correctly and there are no package version clashes.

If you believe this is a bug, please open an issue on Github.

Error [ERR_UNSUPPORTED_DIR_IMPORT]: Directory import './node_modules/.pnpm/@[email protected]_@[email protected][email protected]_prettier@3._6qdorkd3udyipaxdzmyhkuxaka/node_modules/@storybook/addon-svelte-csf/dist/compiler/post-transform/story' is not supported resolving ES modules imported from ./node_modules/.pnpm/@[email protected]_@[email protected][email protected]_prettier@3._6qdorkd3udyipaxdzmyhkuxaka/node_modules/@storybook/addon-svelte-csf/dist/compiler/post-transform/index.js
    at finalizeResolution (node:internal/modules/esm/resolve:263:11)
    at moduleResolve (node:internal/modules/esm/resolve:932:10)
    at defaultResolve (node:internal/modules/esm/resolve:1056:11)
    at ModuleLoader.defaultResolve (node:internal/modules/esm/loader:654:12)
    at #cachedDefaultResolve (node:internal/modules/esm/loader:603:25)
    at ModuleLoader.getModuleJobForRequire (node:internal/modules/esm/loader:353:53)
    at new ModuleJobSync (node:internal/modules/esm/module_job:341:34)
    at ModuleLoader.getModuleJobForRequire (node:internal/modules/esm/loader:413:11)
    at new ModuleJobSync (node:internal/modules/esm/module_job:341:34)
    at ModuleLoader.getModuleJobForRequire (node:internal/modules/esm/loader:413:11)

More info:

    at loadPreset (./node_modules/.pnpm/@[email protected][email protected]/node_modules/@storybook/core/dist/common/index.cjs:16477:13)

More info:

    at loadPreset (./node_modules/.pnpm/@[email protected][email protected]/node_modules/@storybook/core/dist/common/index.cjs:16477:13)
    at async Promise.all (index 1)
    at async loadPresets (./node_modules/.pnpm/@[email protected][email protected]/node_modules/@storybook/core/dist/common/index.cjs:16487:55)
    at async getPresets (./node_modules/.pnpm/@[email protected][email protected]/node_modules/@storybook/core/dist/common/index.cjs:16520:11)
    at async buildDevStandalone (./node_modules/.pnpm/@[email protected][email protected]/node_modules/@storybook/core/dist/core-server/index.cjs:37145:11)
    at async withTelemetry (./node_modules/.pnpm/@[email protected][email protected]/node_modules/@storybook/core/dist/core-server/index.cjs:35757:12)
    at async dev (./node_modules/.pnpm/@[email protected][email protected]/node_modules/@storybook/core/dist/cli/bin/index.cjs:2591:3)
    at async s.<anonymous> (./node_modules/.pnpm/@[email protected][email protected]/node_modules/@storybook/core/dist/cli/bin/index.cjs:2643:74)

WARN Broken build, fix the error above.
WARN You may need to refresh the browser.

WARN   Failed to load preset: {"type":"presets","name":"/Users/Jerry/Developer/svelte-kit-js/node_modules/.pnpm/@[email protected]_@[email protected][email protected]_prettier@3._6qdorkd3udyipaxdzmyhkuxaka/node_modules/@storybook/addon-svelte-csf/dist/preset.js"} on level 1
Error [ERR_UNSUPPORTED_DIR_IMPORT]: Directory import './node_modules/.pnpm/@[email protected]_@[email protected][email protected]_prettier@3._6qdorkd3udyipaxdzmyhkuxaka/node_modules/@storybook/addon-svelte-csf/dist/compiler/post-transform/story' is not supported resolving ES modules imported from ./node_modules/.pnpm/@[email protected]_@[email protected][email protected]_prettier@3._6qdorkd3udyipaxdzmyhkuxaka/node_modules/@storybook/addon-svelte-csf/dist/compiler/post-transform/index.js
    at finalizeResolution (node:internal/modules/esm/resolve:263:11)
    at moduleResolve (node:internal/modules/esm/resolve:932:10)
    at defaultResolve (node:internal/modules/esm/resolve:1056:11)
    at ModuleLoader.defaultResolve (node:internal/modules/esm/loader:654:12)
    at #cachedDefaultResolve (node:internal/modules/esm/loader:603:25)
    at ModuleLoader.getModuleJobForRequire (node:internal/modules/esm/loader:353:53)
    at new ModuleJobSync (node:internal/modules/esm/module_job:341:34)
    at ModuleLoader.getModuleJobForRequire (node:internal/modules/esm/loader:413:11)
    at new ModuleJobSync (node:internal/modules/esm/module_job:341:34)
    at ModuleLoader.getModuleJobForRequire (node:internal/modules/esm/loader:413:11)
 ELIFECYCLE  Command failed with exit code 1.

System

Storybook Environment Info:

  System:
    OS: macOS 15.2
    CPU: (16) arm64 Apple M4 Max
    Shell: 5.9 - /bin/zsh
  Binaries:
    Node: 22.12.0 - ~/.nvm/versions/node/v22.12.0/bin/node
    npm: 10.9.0 - ~/.nvm/versions/node/v22.12.0/bin/npm
    pnpm: 9.14.4 - /opt/homebrew/bin/pnpm <----- active
  Browsers:
    Chrome: 131.0.6778.109
    Safari: 18.2
  npmPackages:
    @storybook/addon-essentials: ^8.4.7 => 8.4.7
    @storybook/addon-interactions: ^8.4.7 => 8.4.7
    @storybook/addon-svelte-csf: ^5.0.0-next.14 => 5.0.0-next.14
    @storybook/blocks: ^8.4.7 => 8.4.7
    @storybook/svelte: ^8.4.7 => 8.4.7
    @storybook/sveltekit: ^8.4.7 => 8.4.7
    @storybook/test: ^8.4.7 => 8.4.7
    storybook: ^8.4.7 => 8.4.7

Additional context

No response