The docker-compose host "<host>" does not exist here

What it means

The application connects to "<host>" as in docker-compose.

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

Here the database and cache are reached through the variables the panel sets (DB_HOST, DATABASE_URL, REDIS_HOST): use them on the Environment tab.

1. 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. It is fixed on the “Environment” tab of the app.
3. 2 After the fix, deploy again. If it fails again, the log ends with [mevcore] lines naming the new error code.
4. 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.compose_hostname
phase: install and build
diagnosis: The docker-compose host "<host>" does not exist here
platform hint: The application connects to "<host>" as in docker-compose. Here the database and cache are reached through the variables the panel sets (DB_HOST, DATABASE_URL, REDIS_HOST): use them on the Environment tab.
platform docs: https://mevcore.com/llms-full.txt

Related errors

• runtime.compose_hostname The docker-compose host "<host>" does not exist here