Vercel deployment stopped working

[pozsa]

Describe the bug

Somewhere between 1.0.0-next.251 and 1.0.0-next.257 the automated Vercel deployment stopped working.
Not sure if this should be opened here, or for vercel.

Reproduction

1. init sveltekit project with 1.0.0-next.251
2. add vercel deployment
3. enable dependabot dependency PR requests
4. observe dependabot opening PR and vercel failing to deploy

Logs

Cloning github.com/myhangar/myhangar (Branch: dependabot/npm_and_yarn/sveltejs/kit-1.0.0-next.257, Commit: 20fc2d5)
Cloning completed: 1.371s
Analyzing source code...
Installing build runtime...
Build runtime installed: 2.584s
Looking up build cache...
Build cache downloaded [29.39 MB]: 1786.516ms
Detected package.json
Installing dependencies...
Detected `package-lock.json` generated by npm 7...
changed 1 package in 1s
33 packages are looking for funding
  run `npm fund` for details
Running "npm run build"
> myhangar@0.0.1 build
> svelte-kit build
> config.kit.target is no longer required, and should be removed
    at file:///vercel/path0/node_modules/@sveltejs/kit/dist/cli.js:874:10
    at file:///vercel/path0/node_modules/@sveltejs/kit/dist/cli.js:766:43
    at file:///vercel/path0/node_modules/@sveltejs/kit/dist/cli.js:752:18
    at file:///vercel/path0/node_modules/@sveltejs/kit/dist/cli.js:752:18
    at validate_config (file:///vercel/path0/node_modules/@sveltejs/kit/dist/cli.js:936:9)
    at load_config (file:///vercel/path0/node_modules/@sveltejs/kit/dist/cli.js:913:20)
    at async file:///vercel/path0/node_modules/@sveltejs/kit/dist/cli.js:1048:19
Error: Command "npm run build" exited with 1

System Info

{
  "name": "myhangar",
  "version": "0.0.1",
  "scripts": {
    "dev": "svelte-kit dev",
    "build": "svelte-kit build",
    "package": "svelte-kit package",
    "preview": "svelte-kit preview",
    "check": "svelte-check --tsconfig ./tsconfig.json",
    "check:watch": "svelte-check --tsconfig ./tsconfig.json --watch",
    "lint": "prettier --ignore-path .gitignore --check --plugin-search-dir=. . && eslint --ignore-path .gitignore .",
    "format": "prettier --ignore-path .gitignore --write --plugin-search-dir=. ."
  },
  "devDependencies": {
    "@sveltejs/adapter-auto": "^1.0.0-next.18",
-   "@sveltejs/kit": "^1.0.0-next.251",
+   "@sveltejs/kit": "^1.0.0-next.259",
    "@typescript-eslint/eslint-plugin": "^5.10.2",
    "@typescript-eslint/parser": "^5.10.2",
    "eslint": "^8.8.0",
    "eslint-config-prettier": "^8.3.0",
    "eslint-plugin-svelte3": "^3.2.1",
    "prettier": "^2.4.1",
    "prettier-plugin-svelte": "^2.4.0",
    "svelte": "^3.44.0",
    "svelte-check": "^2.2.6",
    "svelte-preprocess": "^4.9.4",
    "tslib": "^2.3.1",
    "typescript": "^4.4.3"
  },
  "type": "module"
}

### Severity

blocking an upgrade

### Additional Information

_No response_

[Conduitry]

See #3674.

[pozsa]

@Conduitry thanks