Query engine binary could not be found - netlify & vercel with sveltekit

Bug description

I am receiving the following error with Sveltekit & Vercel (I had the same issue with Netlify, and tried Vercel due to other bug reports saying it solved the problem):

Query engine binary for current platform "rhel-openssl-1.0.x" could not be found.
This probably happens, because you built Prisma Client on a different platform.
(Prisma Client looked in "/var/task/query-engine-rhel-openssl-1.0.x")
Searched Locations:
  /.prisma/client
  /vercel/path0/node_modules/@prisma/client
  /var
  /var/task
  /var/task
  /var/task
You already added the platforms "native", "rhel-openssl-1.0.x" to the "generator" block
in the "schema.prisma" file as described in https://pris.ly/d/client-generator,
but something went wrong. That's suboptimal.

I am using 2.20.1 due to #6899. Sveltekit uses Vite, so the workarounds in similar bugs raised referencing Next.js & webpack aren’t applicable.

How to reproduce

Add prisma to a sveltekit app and deploy to either netlify or vercel

Expected behavior

Expect prisma client to be able to make requests as per local machine.

Prisma information

generator client {
  provider = "prisma-client-js"
  binaryTargets = ["native", "rhel-openssl-1.0.x"]
}

datasource db {
  provider = "postgresql"
  url      = env("DATABASE_URL")
}

Environment & setup

• OS: Netlify & Vercel
• Database: PostgreSQL
• Node.js version: 14
• Prisma version: 2.20.1

[haishanh]

I have the same issue. Here is a workaround I found.

With SvelteKit’s vercel adapter it bundles the SSR code into a script in .vercel_build_output/functions/node/render.

$ ls .vercel_build_output/functions/node/render
index.js     package.json

The vercel adapter uses esbuild to bundle the SSR script. And esbuild seems to have problem with binary deps, at least it can not resolve Prisma query engine binary file.

We could just add a postbuild script into package.json to copy over relevant files ourselves.

"postbuild": "cp node_modules/@prisma/engines/query-engine-* .vercel_build_output/functions/node/render/;cp prisma/schema.prisma .vercel_build_output/functions/node/render/;ls .vercel_build_output/functions/node/render/",

[CJ13th]

00:07:29.886 | > cp prisma/schema.prisma .vercel_build_output/functions/node/render/ && cp nodemodules/@prisma/engines/query .vercel_build_output/functions/node/render/

Where is this code from? Are you sure your folder is called nodemodules and not node_modules?

Damn, thanks for spotting!