error: Cannot find module '@react-email/render' on production build

[DCKT]

Describe the Bug

Hi there,

I just encountered this issue after trying to deploy my app.
I'm using TanStack start with Bun.

It works very well on dev mode but after building the prod, the error appear

error: Cannot find module '@react-email/render'

Things I tried without success :

• install @react-email/render
• downgrade resend sdk (6.x.x, 5.x, 4.x)
• use pnpm and node LTS
• update bun (from 1.2.2 to latest ATM 1.2.9)

I made a repo with a simple repro using the tanstack starter

Link to the code that reproduces this issue

https://github.com/DCKT/resend-react-email-error

To Reproduce

1. import somewhere in the project the @react-email/components
2. build the app through bun run build
3. launch the app bun run .ouput/server/index.mjs
4. access http://localhost:3000

The error is raised directly.

Expected Behavior

Should not crash on production build

What's your node version? (if relevant)

No response

[paaauldev]

Same here

[gabrielmfern]

Issues seems to be mostly because of bun here right? Tried your reproduction with node, and without the target: 'bun' and it works just fine.

Also seems to be more related to React Email than to the Node SDK, as your reproduction states "import @react-email/components somewhere" is sufficient to cause the error. Seems to me like Bun can't find the right export to get the js for @react-email/render

[RafaelZasas]

I'm having this issue with NextJs using pnpm

[DCKT]

Indeed, it works well using npm with node LTS. And also seems more related to react-email than the node sdk.

[sam-canobananas]

When installing with PNPM, in the pnpm-lock.yaml resend has @react-email/render as a peer dependency, not as a dependency.

resend@6.1.1:
resolution: {integrity: ........}
engines: {node: '>=18'}
peerDependencies:
'@react-email/render': ^1.1.0
peerDependenciesMeta:
'@react-email/render':
optional: true

Running pnpm add @react-email/render made the error go away... not ideal when all the docs say to just install resend.

[mickdewald]

When installing with PNPM, in the pnpm-lock.yaml resend has @react-email/render as a peer dependency, not as a dependency.

resend@6.1.1: resolution: {integrity: ........} engines: {node: '>=18'} peerDependencies: '@react-email/render': ^1.1.0 peerDependenciesMeta: '@react-email/render': optional: true

Running pnpm add @react-email/render made the error go away... not ideal when all the docs say to just install resend.

Can confirm this happens in v6.1.1.

A prd build works without the extra import of @react-email/render, but for the dev mode, I need this import.
But it's enough to put it into the devDependencies.