extends key rejected as unknown in workspace turbo.json

[xcfio]

Summary

Hey, running into an issue with turbo v2.9.4 — workspace turbo.json with "extends": ["//"] throws Found an unknown key 'extends' and fails to parse. This is a pnpm monorepo on Windows. Is extends no longer supported in v2.x workspace configs, or am I missing something?

Additional information

> fastify-next@ test D:\Project\template\turborepo\fastify-next
> turbo run test
• turbo 2.9.4
turbo_json_parse_error

  × Failed to parse turbo.json.
  ╰─▶   × Found an unknown key `extends`.
         ╭─[turbo.json:3:5]
       2 │     "$schema": "https://turborepo.com/schema.json",
       3 │     "extends": ["//"],
         ·     ─────────
       4 │     "tasks": {
         ╰────

 ELIFECYCLE  Test failed. See above for more details.
└─ fastify-next#test ──

Example

No response

[anthonyshew]

You're nesting Turborepos, which isn't a supported pattern. You can expect undefined behavior when doing this.

What's happening is that the inner Turborepo is seeing the pnpm-workspace.yaml and pnpm-lock.yaml and the turbo.jsonc at turborepo/fastify-next thinks that it is a root - because it is indeed at a workspace root.