[@clerk/next-js]: output: export not supported with App Router

[ryansteil-pl]

Preliminary Checks

• I have reviewed the documentation: https://clerk.com/docs

• I have searched for existing issues: https://github.com/clerk/javascript/issues

• I have not already reached out to Clerk support via email or Discord (if you have, no need to open an issue here)

• This issue is not a question, general help request, or anything other than a bug report directly related to Clerk. Please ask questions in our Discord community: https://clerk.com/discord.

Reproduction

https://github.com/ryansteil-pl/clerk-nextjs-output-export-example

Publishable key

pk_test_Y29ycmVjdC1sZW11ci00Ni5jbGVyay5hY2NvdW50cy5kZXYk

Description

Steps to reproduce:

1. Clone nextjs starter template
2. Modify next.config.js to output: export
3. Add necessary generateStaticParams()
4. Run pnpm build

Expected behavior:

Build without error

Actual behavior:

pnpm build

> [email protected] build /Users/ryansteil/Developer/clerk-nextjs-output-export-example
> next build

   ▲ Next.js 15.0.3
   - Environments: .env.local

   Creating an optimized production build ...
 ✓ Compiled successfully
 ✓ Linting and checking validity of types    
 ✓ Collecting page data    

> Server Actions are not supported with static export.
 ELIFECYCLE  Command failed with exit code 1.

Environment

System:
    OS: macOS 15.2
    CPU: (10) arm64 Apple M1 Max
    Memory: 180.73 MB / 64.00 GB
    Shell: 5.9 - /bin/zsh
  Binaries:
    Node: 20.9.0 - ~/.nvm/versions/node/v20.9.0/bin/node
    Yarn: 1.22.21 - /opt/homebrew/bin/yarn
    npm: 10.1.0 - ~/.nvm/versions/node/v20.9.0/bin/npm
    pnpm: 9.14.2 - ~/Library/pnpm/pnpm
    bun: 1.0.27 - /opt/homebrew/bin/bun
  Browsers:
    Chrome: 131.0.6778.86
    Safari: 18.2
  npmPackages:
    @clerk/nextjs: 6.3.4 => 6.3.4 
    @types/node: ^22.9.0 => 22.9.3 
    @types/react: ^18.3.12 => 18.3.12 
    @types/react-dom: ^18.3.1 => 18.3.1 
    @types/react-syntax-highlighter: ^15.5.13 => 15.5.13 
    autoprefixer: ^10.4.20 => 10.4.20 
    clsx: ^2.1.1 => 2.1.1 
    next: 15.0.3 => 15.0.3 
    postcss: ^8.4.49 => 8.4.49 
    prism-react-renderer: ^2.4.0 => 2.4.0 
    react: ^18.3.1 => 18.3.1 
    react-dom: ^18.3.1 => 18.3.1 
    react-syntax-highlighter: ^15.6.1 => 15.6.1 
    tailwindcss: ^3.4.15 => 3.4.15 
    typescript: ^5.6.3 => 5.7.2

[ryansteil-pl]

this does build without error using the Pages Router (see reproducible repo here), but because of this Server Action, the build fails when using the App Router