docs: worktree-only Turbopack panic when website .next caches exist - #871
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nx build cockpit dies with 'FileSystemPath(...).join(...) leaves the filesystem root' in a git worktree whenever apps/website/.next or dist/apps/website exists. The caches hold a node_modules symlink whose relative target routes through the MAIN checkout's root — valid on disk, but Turbopack's virtual filesystem refuses to traverse above its project root. Verified: pinning turbopack.root does NOT fix it; clearing the caches does (build goes 1 -> 0). CI is unaffected (fresh, un-nested checkouts). Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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Closes the last open follow-up from the worktree investigation. Docs-only.
nx build cockpitpanics in a git worktree —FileSystemPath(…).join(…) leaves the filesystem root— whenever any website.nextcache exists in the workspace:apps/website/.next(left bynext dev/ the website e2e) ordist/apps/website(left by a build). Those caches contain anode_modulessymlink whose relative target routes through the main checkout's root. The path is valid on disk; Turbopack's virtual filesystem refuses to traverse above its project root and panics.What I verified before writing a word of documentation:
turbopack.rootdoes not fix it — tested, same two panics. The error message's own suggestion is a dead end for this case.A real fix belongs upstream (Turbopack rejecting a disk-valid symlink), so the honest artifact here is the documented workaround in CONTRIBUTING's worktree section:
rm -rf apps/website/.next dist/apps/website && npx nx build cockpit🤖 Generated with Claude Code