nextjs - 💡(How to fix) Fix Turbopack Error: Module in async chunking edge is not chunkable [5 comments, 4 participants]

TurbopackInternalError: Failed to write app endpoint /[domain]/(site)/page

Caused by:
- Module in async chunking edge is not chunkable

---

Operating System:
  Platform: darwin
  Arch: arm64
  Version: Darwin 24.6.0
Binaries:
  Node: 22.16.0
  pnpm: 10.18.1
  npm: N/A
  Yarn: N/A
Relevant Packages:
  next: 16.0.0-canary.6
  react: 19.2.0
  react-dom: 19.2.0
  typescript: 5.x
Turbopack: v16.0.0-canary.5-8-gd0ffcfcb3

---

export default async function RootLayout() {
  const site = await getSiteData(); // Simulates database fetch
  const themeName = site?.themeName ? toKebabCase(site?.themeName) : "one";

  // This line causes the Turbopack error
  const selectedTheme = await import(
    `@/styles/themes/theme-${themeName}`
  );

  const theme = (selectedTheme.default as Theme) ?? null;

  return (
    <div
      className="min-h-screen bg-gray-50"
      {...(site?.themeName
        ? {
            "data-color-theme": `theme-${toKebabCase(site?.themeName)}-palette`,
          }
        : {})}
      {...(site?.themeName
        ? { "data-font-theme": `theme-${toKebabCase(site?.themeName)}-font` }
        : {})}
    >
      ...
    </div>
  );
}

---

import type { Theme } from "@/types/theme";

const themeOne: Theme = {
  name: "one",
  global: { /* ... config ... */ },
  nav: { /* ... config ... */ },
};

export default themeOne;

---

import type { Theme } from "@/types/theme";

const themeTwo: Theme = {
  name: "two",
  global: { /* ... config ... */ },
  nav: { /* ... config ... */ },
};

export default themeTwo;

---

import type { NextConfig } from "next";

const nextConfig: NextConfig = {
};

export default nextConfig;

---

Failed to write app endpoint /home/page

Caused by:
- Module in async chunking edge is not chunkable

Debug info:
- Execution of get_written_endpoint_with_issues_operation failed
- Execution of endpoint_write_to_disk failed
- Execution of <AppEndpoint as Endpoint>::output failed
- Failed to write app endpoint /home/page
- Execution of AppEndpoint::output failed
- Execution of AppEndpoint::app_entry_chunks failed
- Execution of <NodeJsChunkingContext as ChunkingContext>::chunk_group failed
- Module in async chunking edge is not chunkable