install.builder_nothing_detected

The builder did not recognize the project

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

What it means

nixpacks or railpack found no language and no start command.

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

Usually the application directory is wrong: in a monorepo set the folder with package.json, requirements.txt, go.mod and so on in the settings. Otherwise set the start command in the settings or add a Dockerfile.

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.
It is fixed on the “Settings” tab of the app.
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.builder_nothing_detected
phase: install and build
diagnosis: The builder did not recognize the project
platform hint: nixpacks or railpack found no language and no start command. Usually the application directory is wrong: in a monorepo set the folder with package.json, requirements.txt, go.mod and so on in the settings. Otherwise set the start command in the settings or add a Dockerfile.
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