Describe the bug

TypeScript error (2769) when setting the minify build option for async config.

Reproduction

https://github.com/Android789515/vite-minify-error

Steps to reproduce

1. npm create vite@latest
2. Confirm ok to proceed installing create vite if not installed
3. Pick React and TypeScript
4. Don't use Vite 8
5. Don't autostart
6. cd project
7. npm i
8. Edit vite.config.ts

import { defineConfig } from 'vite'
import react from '@vitejs/plugin-react'

// https://vite.dev/config/
// Make async config
export default defineConfig(async () => ({
  plugins: [react()],
  build: {
    // add minify: terser or esbuild
    minify: 'terser',
  },
}))

System Info

System:
    OS: Linux 6.12 EndeavourOS
    CPU: (16) x64 AMD Ryzen 7 9800X3D 8-Core Processor
    Memory: 48.31 GB / 60.43 GB
    Container: Yes
    Shell: 0.110.0 - /usr/bin/nu
  Binaries:
    Node: 25.6.1 - /usr/bin/node
    npm: 11.10.1 - /usr/bin/npm
    Deno: 2.6.10 - /usr/bin/deno
  Browsers:
    Firefox: 147.0.4
    Firefox Developer Edition: 147.0.4
  npmPackages:
    @vitejs/plugin-react: ^5.1.1 => 5.1.4
    vite: ^7.3.1 => 7.3.1

Used Package Manager

npm

Logs

No response

Validations

• Follow our Code of Conduct
• Read the Contributing Guidelines.
• Read the docs.
• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.
• Make sure this is a Vite issue and not a framework-specific issue. For example, if it's a Vue SFC related bug, it should likely be reported to vuejs/core instead.
• Check that this is a concrete bug. For Q&A open a GitHub Discussion or join our Discord Chat Server.
• The provided reproduction is a minimal reproducible example of the bug.