Vercel not detecting .vercel_build_output (svelte-kit) when building with turbo

[Fedeorlandau]

What version of Turborepo are you using?

1.0.6

Describe the Bug

For some reason Vercel is not detecting the .vercel_build_output content and generating the serverless functions/routes/static files accordingly.

I've set up 2 projects on Vercel using the same repository, one is building the frontend app with svelte-kit and the other one with turborepo. Check the screenshots:

Expected Behavior

To get Vercel detecting the build generated by turbo.

To Reproduce

Without turbo	With turbo
As you can see, vercel is detecting the .vercel_build_output content	The adapter is generating the folder but not detecting the content afterwards

Without turbo	With turbo
Website running fine

{
    "private": true,
    "name": "test",
    "workspaces": [
        "apps/*"
    ],
    "scripts": {
        "frontend:prod": "yarn workspace frontend build",
        "backend:prod": "yarn workspace backend build && yarn workspace backend start:prod",
        "bootstrap": "rimraf node_modules && yarn && yarn start"
    },
    "devDependencies": {
        "rimraf": "^3.0.2",
        "turbo": "^1.0.6"
    },
    "turbo": {
        "baseBranch": "origin/main",
        "pipeline": {
            "build": {
                "dependsOn": ["^build"],
                "outputs": [".vercel_build_output/**", ".svelte-kit/**"],
                "cache": false
            },
            "test": {
                "dependsOn": ["^build"],
                "outputs": []
            },
            "lint": {
                "outputs": []
            },
            "dev": {
                "cache": false
            },
            "frontend#deploy": {
                "dependsOn": ["frontend#build"]
            }
        }
    }   
}

Thank you!

[jaredpalmer]

Set turbo to run from the root directory with something like: cd ../.. && npx turbo run build —scope=<app> —includeDependencies

[Fedeorlandau]

@jaredpalmer hi there, thank you for your answer.

I'm running it from the root directory. If you check the screenshot above you'll see the that root directory is "./".

I've tried to turbo run build -scope=frontend -includeDependencies but the result is the same.

The .vercel_build_output is there but vercel is not doing anything with it:

This is what is missing from the pipeline with turbo

Detected Serverless Functions in ".vercel_build_output"
--
19:05:10.888 | Detected Static Assets in ".vercel_build_output"
19:05:10.888 | Detected Routes Configuration in ".vercel_build_output"

Thanks

[Fedeorlandau]

Fixed it. I've changed a few things.

Thank you for your work. Turbo is amazing.

[jaredpalmer]

You can remove build output and install commands, I think vercel should infer those and solve the problem

[Fedeorlandau]

You're 100% correct. Thank you again.