Can't build with server.ts and bun

[OYERA1]

Which project does this relate to?

Start

Describe the bug

I follow the instructions to build my app with bun and using the nitro preset for bun, but everytime I run dev or build the project I receive an error. Even in a fresh downloaded app I receive the same error. I also discover that the bug is something related with SERVER_ENTRY_POINT which doesn't build properly. I really dont know if I'm doing something wrong, I follow the instructions given in Tanstack documentation step by step

Your Example Website or App

https://github.com/OYERA1/tanstack-error-example

Steps to Reproduce the Bug or Issue

1. Clone the repo
2. Install dependencies Bun i
3. run bun run build or bun run dev

Expected behavior

Just build successfully

Screenshots or Videos

No response

Platform

• Start Version: 1.132.0
• OS: Linux - Fedora 43 GNOME
• Bundler: vite
• Bundler Version: 7.1.7

Additional context

running bun run dev results in

  ➜  Local:   http://localhost:3000/
  ➜  Network: use --host to expose
  ➜  press h + enter to show help
6:21:34 PM [vite] (nitro) warning: 
/home/oyera/Dev/teste/server.ts
279 |    let handler;
280 |    try {
281 |      const serverModule = await import(SERVER_ENTRY_POINT);
    |                                        ^^^^^^^^^^^^^^^^^^
282 |      handler = serverModule.default;
283 |      log.success("TanStack Start application handler initialized");
The above dynamic import cannot be analyzed by Vite.
See https://github.com/rollup/plugins/tree/master/packages/dynamic-import-vars#limitations for supported dynamic import formats. If this is intended to be left as-is, you can use the /* @vite-ignore */ comment inside the import() call to suppress this warning.

  Plugin: vite:import-analysis
  File: /home/oyera/Dev/teste/server.ts:28998:47
LOG /server.ts:88:5 - http://localhost:3000/__tsd/open-source?source=%2Fserver.ts%3A88%3A5
 →  
Starting Production Server

LOG /server.ts:85:5 - http://localhost:3000/__tsd/open-source?source=%2Fserver.ts%3A85%3A5
 →  [ERROR] Failed to load server handler: Error: Failed to load url /dist/server/server.js (resolved id: /dist/server/server.js). Does the file exist?
LOG /server.ts:76:5 - http://localhost:3000/__tsd/open-source?source=%2Fserver.ts%3A76%3A5
 →  [INFO] Loading static assets from ./dist/client...
LOG /server.ts:85:5 - http://localhost:3000/__tsd/open-source?source=%2Fserver.ts%3A85%3A5
 →  [ERROR] Failed to load static files from ./dist/client: Error: ENOENT: no such file or directory, open 'dist/client'
LOG /server.ts:79:5 - http://localhost:3000/__tsd/open-source?source=%2Fserver.ts%3A79%3A5
 →  [SUCCESS] Server listening on http://localhost:3000```

running ```bun run build``` results in

```$ bun --bun vite build
ℹ Using server.ts as default route handler.                                                                                                                                        6:23:24 PM
vite v7.3.0 building client environment for production...
transforming (93) node_modules/@tanstack/router-core/dist/esm/ssr/client.js
[@tanstack/devtools-vite] Removed devtools code from: /src/routes/__root.tsx

✓ 1804 modules transformed.
.output/public/assets/styles-B8PbFr91.css               31.62 kB │ gzip:  5.52 kB
.output/public/assets/start.api-request-Dyl97b8o.js      0.89 kB │ gzip:  0.53 kB
.output/public/assets/start.ssr.full-ssr-D39lTm4g.js     0.91 kB │ gzip:  0.51 kB
.output/public/assets/start.ssr.data-only-CD2azC4w.js    0.91 kB │ gzip:  0.51 kB
.output/public/assets/start.ssr.spa-mode-C2FrKvQ0.js     0.95 kB │ gzip:  0.54 kB
.output/public/assets/start.ssr.index-CB1iwf0N.js        1.67 kB │ gzip:  0.64 kB
.output/public/assets/start.server-funcs-DQ1s4mhc.js     1.70 kB │ gzip:  0.93 kB
.output/public/assets/index-DbqAnPaO.js                  5.34 kB │ gzip:  2.15 kB
.output/public/assets/main-Bb5-B-sP.js                 313.80 kB │ gzip: 99.69 kB
✓ built in 2.33s
vite v7.3.0 building ssr environment for production...
transforming (1) node_modules/@tanstack/react-start/dist/plugin/default-entry/server.ts
[@tanstack/devtools-vite] Removed devtools code from: /src/routes/__root.tsx

"createRequestHandler", "defineHandlerCallback", "transformPipeableStreamWithRouter" and "transformReadableStreamWithRouter" are imported from external module "@tanstack/router-core/ssr/server" but never used in "node_modules/@tanstack/start-server-core/dist/esm/index.js".
"hydrate" is imported from external module "@tanstack/router-core/ssr/client" but never used in "node_modules/@tanstack/start-client-core/dist/esm/index.js".
✓ 62 modules transformed.
node_modules/.nitro/vite/services/ssr/assets/styles-B8PbFr91.css                     31.62 kB
node_modules/.nitro/vite/services/ssr/assets/start-HYkvq4Ni.js                        0.06 kB
node_modules/.nitro/vite/services/ssr/assets/start.api-request-DhPN1_Dc.js            1.18 kB
node_modules/.nitro/vite/services/ssr/assets/demo.punk-songs-C5iBT6B3.js              1.22 kB
node_modules/.nitro/vite/services/ssr/assets/start.server-funcs-e2jlXmpN.js           1.27 kB
node_modules/.nitro/vite/services/ssr/assets/start.server-funcs-CBtPCd4R.js           1.63 kB
node_modules/.nitro/vite/services/ssr/assets/start.ssr.full-ssr-BJzU9Cbv.js           1.64 kB
node_modules/.nitro/vite/services/ssr/assets/start.ssr.data-only-2WCWoVJx.js          1.64 kB
node_modules/.nitro/vite/services/ssr/assets/_tanstack-start-manifest_v-DyrYUKmD.js   1.72 kB
node_modules/.nitro/vite/services/ssr/assets/start.ssr.spa-mode-BcOdIT5k.js           1.75 kB
node_modules/.nitro/vite/services/ssr/assets/start.ssr.index-BmCCCK3g.js              1.96 kB
node_modules/.nitro/vite/services/ssr/assets/start.server-funcs-D0cVuy9C.js           3.31 kB
node_modules/.nitro/vite/services/ssr/assets/index-Bn-KsgDK.js                        4.73 kB
node_modules/.nitro/vite/services/ssr/assets/router-DSka8TZi.js                      14.16 kB
node_modules/.nitro/vite/services/ssr/server.js                                      31.46 kB
✓ built in 380ms

◐ Building [Nitro] (preset: bun, compatibility: 2025-12-13)                                                                                                                   nitro 6:23:27 PM
✔ Generated public .output/public                                                                                                                                            nitro 6:23:27 PM
vite v7.3.0 building nitro environment for production...
✓ 1819 modules transformed.
✗ Build failed in 4.05s
error during build:
virtual:#nitro-internal-virtual/routing (14:7): "default" is not exported by "server.ts", imported by "virtual:#nitro-internal-virtual/routing".
file: virtual:#nitro-internal-virtual/routing:14:7

12: }
13: 
14: import _8Q1W2w from "/home/usr/Dev/teste/server.ts";
           ^
15: import _teTUSL from "/home/usr/Dev/teste/node_modules/nitro/dist/runtime/internal/static";

Error
    at getRollupError (/home/usr/Dev/teste/node_modules/rollup/dist/es/shared/parseAst.js:401:45)
    at error (/home/usr/Dev/teste/node_modules/rollup/dist/es/shared/parseAst.js:397:42)
    at findVariable (/home/usr/Dev/teste/node_modules/rollup/dist/es/shared/node-entry.js:15113:39)
    at findVariable (/home/usr/Dev/teste/node_modules/rollup/dist/es/shared/node-entry.js:5674:38)
    at findVariable (/home/usr/Dev/teste/node_modules/rollup/dist/es/shared/node-entry.js:5674:38)
    at bind (/home/usr/Dev/teste/node_modules/rollup/dist/es/shared/node-entry.js:5448:40)
    at bind (/home/usr/Dev/teste/node_modules/rollup/dist/es/shared/node-entry.js:2813:28)
    at bind (/home/usr/Dev/teste/node_modules/rollup/dist/es/shared/node-entry.js:12148:15)
    at bind (/home/usr/Dev/teste/node_modules/rollup/dist/es/shared/node-entry.js:2813:28)
    at bind (/home/usr/Dev/teste/node_modules/rollup/dist/es/shared/node-entry.js:12148:15)
    at bind (/home/usr/Dev/teste/node_modules/rollup/dist/es/shared/node-entry.js:2817:23)
    at bind (/home/usr/Dev/teste/node_modules/rollup/dist/es/shared/node-entry.js:2813:28)
    at bind (/home/usr/Dev/teste/node_modules/rollup/dist/es/shared/node-entry.js:2817:23)
    at bind (/home/usr/Dev/teste/node_modules/rollup/dist/es/shared/node-entry.js:2813:28)
    at bind (/home/usr/Dev/teste/node_modules/rollup/dist/es/shared/node-entry.js:2813:28)
    at bind (/home/usr/Dev/teste/node_modules/rollup/dist/es/shared/node-entry.js:2817:23)
    at bind (/home/usr/Dev/teste/node_modules/rollup/dist/es/shared/node-entry.js:2817:23)
    at bind (/home/usr/Dev/teste/node_modules/rollup/dist/es/shared/node-entry.js:12148:15)
    at bind (/home/usr/Dev/teste/node_modules/rollup/dist/es/shared/node-entry.js:2817:23)
    at bind (/home/usr/Dev/teste/node_modules/rollup/dist/es/shared/node-entry.js:2813:28)
    at bind (/home/usr/Dev/teste/node_modules/rollup/dist/es/shared/node-entry.js:12672:27)
    at bind (/home/usr/Dev/teste/node_modules/rollup/dist/es/shared/node-entry.js:2813:28)
    at bindReferences (/home/usr/Dev/teste/node_modules/rollup/dist/es/shared/node-entry.js:16973:18)
    at sortModules (/home/usr/Dev/teste/node_modules/rollup/dist/es/shared/node-entry.js:22789:20)
    at build (/home/usr/Dev/teste/node_modules/rollup/dist/es/shared/node-entry.js:22687:14)
    at async <anonymous> (/home/usr/Dev/teste/node_modules/rollup/dist/es/shared/node-entry.js:23378:25)
    at processTicksAndRejections (unknown:7:39)
error: "vite" exited with code 1
error: script "build" exited with code 1```

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[schiller-manuel]

you wouldnt use nitro if you want to use a custom bun server, remove the nitro plugin from the vite config

[OYERA1]

you wouldnt use nitro if you want to use a custom bun server, remove the nitro plugin from the vite config

Oh, I get it now, I racked my brain so much over this that I didn't pay attention to something so simple while read the documentation, thank you very much