Are there any other error messages that appeared along with this one?

Have you made sure that bun is installed correctly?

I can't see any other errors. I've attached a screenshot with more context. You can see that the container goes to sleep, then wakes up and the 'bun start' command runs. I've also tried switching between Railpack and Nixpacks and disabling the "Use Metal Build Environment"

My package.json scripts:

"scripts": {
		"dev": "bunx --bun vite",
		"build": "bunx --bun vite build",
		"preview": "bunx --bun vite preview",
		"lint": "prettier --check . && eslint .",
		"start": "PORT=8080 bun run ./build",
	}

When i run it locally, i get:

$ PORT=8080 bun run ./build

Listening on http://0.0.0.0:8080/

It's not a huge issue, but it may bury some legitimate errors..

Yeah I’ve seen that before too, found this on GitHub

https://github.com/oven-sh/bun/issues/24990#issuecomment-3579912964

Seems like they don’t want to write to stdout for things that aren’t actually coming from the running program so they write their “$ inside-script” message to stderr hence why it’s getting logged as such

Custom start command solved the issue. Thanks

bun --silent start

I also tried updating my start command to

"start": "bun --silent ./build",

but this didnt work.

Coming back here. So you have to remember to update the custom start command in your service so you don't get this error

bun --silent start

NOT the start command in your package.json.