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"Cannot read property 'rimraf' of undefined" when building using adapter-vercel

See original GitHub issue

Describe the bug

Hi, I’m upgrading SvelteKit to ^1.0.0-next.278 in order to take advantage of some newer features like afterNavigate.

The build and runtime work locally but I’m getting the following failure on Vercel:

> Using @sveltejs/adapter-vercel
> Cannot read property 'rimraf' of undefined
    at adapt (file:///vercel/path0/node_modules/@sveltejs/adapter-vercel/index.js:17:10)
    at adapt (file:///vercel/path0/node_modules/@sveltejs/kit/dist/chunks/index5.js:881:8)
    at file:///vercel/path0/node_modules/@sveltejs/kit/dist/cli.js:1062:11

I’ve cleared the build cache on Vercel.

Reproduction

Run the following repo locally and deploy to Vercel. It should work locally but fail on Vercel.

https://github.com/natevaughan/launcher/tree/upgrade-sveltekit

Logs

Cloning github.com/natevaughan/launcher (Branch: main, Commit: e42023e)
Cloning completed: 661.173ms
Analyzing source code...
Installing build runtime...
Build runtime installed: 2.984s
Looking up build cache...
Build Cache not found
Detected package.json
Installing dependencies...
Detected `package-lock.json` generated by npm 7...
> launcher@0.0.1 postinstall
> prisma generate || true
Prisma schema loaded from prisma/schema.prisma
✔ Generated Prisma Client (3.6.0 | library) to ./node_modules/@prisma/client in 229ms
You can now start using Prisma Client in your code. Reference: https://pris.ly/d/client

import { PrismaClient } from '@prisma/client'
const prisma = new PrismaClient()

added 424 packages in 18s
62 packages are looking for funding
  run `npm fund` for details
> launcher@0.0.1 build /vercel/path0
> svelte-kit build
vite v2.8.4 building for production...
transforming...
// ...
Run npm run preview to preview your production build locally.
> Using @sveltejs/adapter-vercel
> Cannot read property 'rimraf' of undefined
    at adapt (file:///vercel/path0/node_modules/@sveltejs/adapter-vercel/index.js:17:10)
    at adapt (file:///vercel/path0/node_modules/@sveltejs/kit/dist/chunks/index5.js:881:8)
    at file:///vercel/path0/node_modules/@sveltejs/kit/dist/cli.js:1062:11
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! launcher@0.0.1 build: `svelte-kit build`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the launcher@0.0.1 build script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
npm ERR! A complete log of this run can be found in:
npm ERR!     /vercel/.npm/_logs/2022-02-18T21_24_46_615Z-debug.log
Error: Command "npm run build" exited with 1