install.npm_optional_deps

No Linux binary of a package (lock file from Windows/macOS)

A mevcore app hosting error at the “install and build” stage.

What it means

package-lock.json was made on Windows or macOS, and because of an npm bug the optional dependency with the Linux binary (rollup, esbuild, SWC, lightningcss, tailwind oxide) was not installed.

The error happened while installing dependencies or building the project. The new version was not started, the current one keeps running.

Typical causes

The install or build command exited with an error
Out of memory or disk space
The language or package manager version is not the one the project expects

How to fix it on mevcore

Regenerate the lock file on Linux (WSL or Docker: delete node_modules and package-lock.json, run npm install) or delete package-lock.json from the repository, commit and deploy again. Do not commit node_modules.

1 Open the app in the mevcore panel: the Problems card on the overview shows this error and the log line it was found in.
2 After the fix, deploy again. If it fails again, the log ends with [mevcore] lines naming the new error code.
3 The "Ask AI" button next to the error prepares a request for ChatGPT or Claude: the error code, the end of the log without secrets and the app settings.

For an AI assistant

The same in English: paste it together with the log into the AI chat.

mevcore error code: install.npm_optional_deps
phase: install and build
diagnosis: No Linux binary of a package (lock file from Windows/macOS)
platform hint: package-lock.json was made on Windows or macOS, and because of an npm bug the optional dependency with the Linux binary (rollup, esbuild, SWC, lightningcss, tailwind oxide) was not installed. Regenerate the lock file on Linux (WSL or Docker: delete node_modules and package-lock.json, run npm install) or delete package-lock.json from the repository, commit and deploy again. Do not commit node_modules.
platform docs: https://mevcore.com/llms-full.txt

Can't fix it?

Message support with the error code: we will tell you what to change in the project or settings.

App hosting