Workflow execution fails with Turbopack: TP1006 path.join is very dynamic #35
Description
Issue
Workflows fail to execute when using Next.js with Turbopack (default in Next.js 16).
Error
Error: [turbopack-node]/transforms/transforms.ts:53:10
lint TP1006 path.join(???*0*, (???*2* ? ???*5* : ???*7*)) is very dynamic
51 | }
52 | export const fromPath = (path: string) => {
> 53 | return join(contextDir, sep \!== '/' ? path.replaceAll('/', sep) : path)
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
54 | }
Import trace:
webpack_loaders:
[turbopack-node]/transforms/transforms.ts
[turbopack-node]/transforms/webpack-loaders.ts
Reproduce
# Next.js 15 project with Turbopack
yarn add workflow@4.0.1-beta.2
# next.config.mjs
import { withWorkflow } from "workflow/next";
export default withWorkflow(nextConfig);
# Create basic workflow with "use workflow" directive
yarn dev --turbopack
curl http://localhost:3000/api/test-workflowExpected
Workflow executes successfully.
Actual
- ✅ Dev server starts
- ✅ Workflow directives discovered
- ❌ Workflow execution returns 500 error
Environment
workflow@4.0.1-beta.2- Next.js 15.5.6 with
--turbopack - Node v22.19.0
- Yarn 4.9.4
Workaround
Remove --turbopack flag (use webpack instead).
Impact
Critical for Next.js 16 adoption: Next.js 16 uses Turbopack by default, which will break all workflow applications on upgrade unless this is fixed or Next.js provides an opt-out mechanism.