Error: turbo_json_parse_error Found an unknown key tasks. -- only on PRODUCTION

[brunofin]

Summary

I am running into this error on my turbo repo:

Detected Next.js version: 14.2.3
Running "turbo run build"
Attention:
Turborepo now collects completely anonymous telemetry regarding usage.
This information is used to shape the Turborepo roadmap and prioritize features.
You can learn more, including how to opt-out if you'd not like to participate in this anonymous program, by visiting the following URL:
https://turbo.build/repo/docs/telemetry
turbo_json_parse_error
  x failed to parse turbo json
Error: turbo_json_parse_error
  x Found an unknown key `tasks`.
   ,-[5:1]
 5 |   ],
 6 |   "tasks": {
   :   ^^^^^^^
 7 |     "build": {
   `----
Error: Command "turbo run build" exited with 1

The error only happens on my production builds. All preview builds work just fine. This happens on all apps for the monorepo.

Example

No response

Steps to Reproduce

I am not sure how to reproduce. I setup a turbo repo monorepo on Vercel, all preview builds work fine but not production.

Here's my redacted package.json:

{
  "name": "<redacted>-monorepo",
  "private": true,
  "scripts": {
    "build": "turbo build",
    "dev": "turbo dev",
    "lint": "turbo lint",
    "format": "prettier --write \"**/*.{ts,tsx,md}\""
  },
  "devDependencies": {
    "@repo/eslint-config": "*",
    "@repo/typescript-config": "*",
    "prettier": "^3.2.5",
    "turbo": "^2.0.3"
  },
  "engines": {
    "node": "20",
    "yarn": "1.22"
  },
  "packageManager": "yarn@1.22.19",
  "workspaces": [
    "apps/*",
    "packages/@<redacted1>/*",
    "packages/@<redacted2>/*"
  ],
  "resolutions": {
    "typescript": "5.4.5",
    "@types/node": "20",
    "@types/react": "18.3.1",
    "@types/react-dom": "18.3.0",
    "next": "14.2.3",
    "react": "18.3.1",
    "react-17": "npm:react@17.0.2",
    "react-dom": "18.3.1",
    "react-dom-17": "npm:react-dom@17.0.2",
    "eslint": "8.46.0",
    "eslint-config-next": "14.2.3",
    "tailwindcss": "3.4.4"
  }
}

And turbo.json:

{
  "$schema": "https://turbo.build/schema.json",
  "globalDependencies": [
    "**/.env.*local"
  ],
  "tasks": {
    "build": {
      "env": [
        "BIG",
        "LIST",
        "OF",
        "ENV",
        "VARS"
      ],
      "dependsOn": [
        "^build"
      ],
      "outputs": [
        ".next/**",
        "!.next/cache/**"
      ]
    },
    "lint": {
      "dependsOn": [
        "^lint"
      ]
    },
    "dev": {
      "cache": false,
      "persistent": true
    }
  }
}

[versecafe]

@brunofin Try running a build with no build cache, it might just be using a cached version of Turbo 1.x which expects pipeline instead of tasks

[brunofin]

Hi thanks for your reply, but unfortunately that's not it, that project was setup just today and has no successful production builds yet so no production cache.

[cSarcasme]

same issue too i dont know what to do...

[mpereira]

I also just tried redeploying on Vercel and not checking the checkbox for reusing the build cache. Same error.

Also notice this line in the logs:

The following package was not found and will be installed: turbo-ignore@2.0.4

[03:03:48.840] Running build in Washington, D.C., USA (East) – iad1
[03:03:48.946] Cloning <redacted> (Branch: <redacted>, Commit: <redacted>)
[03:03:48.956] Skipping build cache, deployment was triggered without cache.
[03:03:50.067] Cloning completed: 1.121s
[03:03:50.068] Running "npx turbo-ignore"
[03:03:50.925] npm WARN exec The following package was not found and will be installed: turbo-ignore@2.0.4
[03:03:51.292] ≫   Using Turborepo to determine if this project is affected by the commit...
[03:03:51.292] 
[03:03:51.292] ≫   `TURBO_FORCE` detected
[03:03:51.293] ✓ Proceeding with deployment
[03:03:51.639] Running "vercel build"
[03:03:52.073] Vercel CLI 34.2.7
[03:03:52.422] Installing dependencies...
[03:04:21.747] 
[03:04:21.748] added 757 packages in 29s
[03:04:21.748] 
[03:04:21.748] 176 packages are looking for funding
[03:04:21.748]   run `npm fund` for details
[03:04:21.793] Detected Next.js version: 14.2.4
[03:04:21.794] Running "turbo run build"
[03:04:22.658] 
[03:04:22.659] Attention:
[03:04:22.659] Turborepo now collects completely anonymous telemetry regarding usage.
[03:04:22.659] This information is used to shape the Turborepo roadmap and prioritize features.
[03:04:22.659] You can learn more, including how to opt-out if you'd not like to participate in this anonymous program, by visiting the following URL:
[03:04:22.659] https://turbo.build/repo/docs/telemetry
[03:04:22.660] 
[03:04:22.767] turbo_json_parse_error
[03:04:22.767] 
[03:04:22.767]   x failed to parse turbo json
[03:04:22.767] 
[03:04:22.767] Error: turbo_json_parse_error
[03:04:22.767] 
[03:04:22.767]   x Found an unknown key `tasks`.
[03:04:22.767]    ,-[2:1]
[03:04:22.767]  2 |   "$schema": "https://turbo.build/schema.json",
[03:04:22.767]  3 |   "tasks": {
[03:04:22.767]    :   ^^^^^^^
[03:04:22.767]  4 |     "analyze-dependencies": {},
[03:04:22.767]    `----
[03:04:22.768] 
[03:04:22.776] Error: Command "turbo run build" exited with 1
[03:04:25.685] 

[brunofin]

I just solved the problem by moving my dependency to turbo from devDependencies to dependencies:

{
  "name": "<redacted>-monorepo",
  "private": true,
  "scripts": {
    "build": "turbo build",
    "dev": "turbo dev",
    "lint": "turbo lint",
    "format": "prettier --write \"**/*.{ts,tsx,md}\""
  },
  "devDependencies": {
    "@repo/eslint-config": "*",
    "@repo/typescript-config": "*",
    "prettier": "^3.2.5"
  },
  "dependencies": {
    "turbo": "^2.0.3"
  },
  "engines": {
    "node": "20",
    "yarn": "1.22"
  },
  "packageManager": "yarn@1.22.19",
  "workspaces": [
    "apps/*",
    "packages/@<redacted1>/*",
    "packages/@<redacted2>/*"
  ]
}

[cSarcasme]

ty i have done a new install with docker before i had use a other example move turbo to depedencies delete packagelock and node modules of the root .

Also i have change npm to yarn and now no more issue ty for your help.

The headache is finish lol

@brunofin

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