Error [ERR_MODULE_NOT_FOUND]: Cannot find package 'fast-xml-builder'

[fraserc182]

Description

We're running repomix in gitlab ci/cd pipelines and it has went from working at 1100 UTC to failing at the next run which was 1330 UTC. Our pipelines have not changed in this time. Has something changed to trigger this error?

📦 Repomix v1.12.0
file:///usr/local/lib/node_modules/repomix/node_modules/tinypool/dist/utils-B--2TaWv.js:33
throw error;
^
Error [ERR_MODULE_NOT_FOUND]: Cannot find package 'fast-xml-builder' imported from /usr/local/lib/node_modules/repomix/node_modules/fast-xml-parser/src/xmlbuilder/json2xml.js
at Object.getPackageJSONURL (node:internal/modules/package_json_reader:314:9)
at packageResolve (node:internal/modules/esm/resolve:767:81)
at moduleResolve (node:internal/modules/esm/resolve:853:18)
at defaultResolve (node:internal/modules/esm/resolve:983:11)
at #cachedDefaultResolve (node:internal/modules/esm/loader:731:20)
at ModuleLoader.resolve (node:internal/modules/esm/loader:708:38)
at ModuleLoader.getModuleJobForImport (node:internal/modules/esm/loader:310:38)
at ModuleJob._link (node:internal/modules/esm/module_job:182:49)
at process.processTicksAndRejections (node:internal/process/task_queues:105:5) {
code: 'ERR_MODULE_NOT_FOUND'
}
Node.js v22.22.0
Uncaught Exception: TypeError: emitter.removeListener is not a function
at ChildProcess.errorListener (node:events:979:15)
at Object.onceWrapper (node:events:634:26)
at ChildProcess.emit (node:events:531:35)
at ChildProcess.onUnexpectedExit (file:///usr/local/lib/node_modules/repomix/node_modules/tinypool/dist/index.js:79:16)
at ChildProcess.emit (node:events:531:35)
at ChildProcess._handle.onexit (node:internal/child_process:293:12)
ERROR: Failed to generate root directory structure.

Usage Context

None

Repomix Version

v1.12.0

Node.js Version

22.22.0-r0

[github-actions]

Related Issues

I found a similar issue that might be helpful:

• npx repomix kabooms with "Cannot find module ... cliRun.js" #197 - npx repomix kabooms with "Cannot find module ... cliRun.js" - Also a module resolution error (ERR_MODULE_NOT_FOUND) when running repomix, suggesting a similar class of packaging/installation issue

These might provide additional context or solutions.

[fraserc182]

I think this may be an upstream issue in fast-xml-builder NaturalIntelligence/fast-xml-builder#7

[yamadashy]

Hi, @fraserc182 !
Thanks for reporting this!

This was caused by an upstream issue in fast-xml-parser@5.5.0, which was published with a broken local file dependency (fast-xml-builder). See: NaturalIntelligence/fast-xml-parser#799

I've confirmed locally that 5.5.0 fails with ERR_MODULE_NOT_FOUND under ESM, while updated versions work correctly.

The upstream issue has been fixed in fast-xml-parser@5.5.2, so reinstalling repomix should resolve this:

npm cache clean --force
npm install -g repomix