I have a build that i am upgrading to pnpm v10. i enabled the ENABLE_EXPERIMENTAL_COREPACK=1 and now i am getting error WARN! Warning: Could not enable corepack because package.json is missing "packageManager" property so my lockfile is not working
where does vercel try to read the packageManager from? i have it in root level, monorepo folder, specific package as well
I have my build logs if necessary to show.
I just tried a fresh install of the Turbopack basic example, it comes default with packageManager only on the project root and successfully read this when building with ENABLE_EXPERIMENTAL_COREPACK=1
Putting it additionally on the specific package did not seem to break anything
Can you share more about your project setup so we can debug further? https://turborepo.com/docs/getting-started/examples
I am constantly switching the flag on/off now as it breaks all the builds.
Here’s my root directory setup (tried to cleanup some folders)
Bold feat/eslint-improvements ? ❯ ltdrwxr-xr-x - grokgrok 6 Oct 20:19 -N .lrwxrwxrwx - grokgrok 16 Sep 10:14 -- ├── AGENTS.md -> CLAUDE.md.rw-r--r-- 14k grokgrok 16 Sep 10:14 -- ├── CLAUDE.md.rw-r--r-- 1.9k grokgrok 6 Oct 12:46 -- ├── Dockerfiledrwxr-xr-x - grokgrok 13 Sep 18:27 -- ├── e2e.rw-r--r-- 34k grokgrok 13 Sep 18:27 -- │ ├── package-lock.json.rw-r--r-- 574 grokgrok 13 Sep 18:27 -- │ ├── package.json.rw-r--r-- 2.9k grokgrok 13 Sep 18:27 -- │ ├── playwright.config.tsdrwxr-xr-x - grokgrok 13 Sep 18:27 -- │ ├── src.rw-r--r-- 743 grokgrok 13 Sep 18:27 -- │ └── tsconfig.jsondrwxr-xr-x - grokgrok 6 Oct 20:19 -N ├── monorepodrwxr-xr-x - grokgrok 13 Sep 18:27 -N │ ├── apps.rw-r--r-- 181 grokgrok 5 Oct 15:36 -- │ ├── eslint.config.jsdrwxr-xr-x - grokgrok 6 Oct 20:19 -I │ ├── node_modules.rw-r--r-- 1.4k grokgrok 6 Oct 19:32 -- │ ├── package.jsondrwxr-xr-x - grokgrok 13 Sep 18:27 -- │ ├── packagesdrwxr-xr-x - grokgrok 3 Oct 11:03 -- │ ├── patches.rw-r--r-- 1.9M grokgrok 6 Oct 19:32 -- │ ├── pnpm-lock.yaml.rw-r--r-- 161 grokgrok 13 Sep 18:27 -- │ ├── pnpm-workspace.yaml.rw-r--r-- 209 grokgrok 13 Sep 18:27 -- │ ├── prettier.config.js.rw-r--r-- 2.4k grokgrok 13 Sep 18:27 -- │ ├── README.md.rw-r--r-- 2.0k grokgrok 6 Oct 19:03 -- │ └── turbo.json.rw-r--r-- 353 grokgrok 6 Oct 18:00 -- ├── package.json.rw-r--r-- 13k grokgrok 6 Oct 18:00 -- ├── pnpm-lock.yaml.rw-r--r-- 2.4k grokgrok 13 Sep 18:27 -- ├── README.md.rw-r--r-- 496 grokgrok 13 Sep 18:27 -- ├── renovate.jsondrwxr-xr-x - grokgrok 13 Sep 18:27 -- ├── scripts.rw-r--r-- 640 grokgrok 13 Sep 18:27 -- │ ├── ...drwxr-xr-x - grokgrok 13 Sep 18:27 -- ├── terraformdrwxr-xr-x - grokgrok 13 Sep 18:27 -- │ ├── ...Notice i have a top level package.json and a package.json inside the monorepo folder.
Both have "packageManager": "pnpm@10.18.0",
And for example one of the projects is setup like this
I think the issue happens though before the install command since the warning about corepack appears before that
✓ Proceeding with deploymentRunning "vercel build"Vercel CLI 48.2.0WARN! Warning: Could not enable corepack because package.json is missing "packageManager" propertyRunning "install" command: `cd ../../ && python3 -m pip install setuptools && pnpm install --frozen-lockfile`... Here’s one example https://vercel.com/bolddotorg/site/ARDdFegC1MkcnW4oje2KrvidnX5X#L45 (not sure you have access or how to give)
For anyone having the same problem. i changed by install command to be `corepack activate && corepack pnpm install --frozen-lockfile` and it goes through. Still unsure why Vercel build can’t see the package manager correctly as its clearly there.
As a note, corepack activate seems to not be a valid command, but corepack enable might be what you meant?
I also had to prefix my pnpm build build command with corepack to get this to work.