Environment

Node.js: v20.10.0
pnpm: v8.15.6

Reproduction

https://github.com/s3xysteak/unbuild-alias-error

pnpm i
pnpm build

It will throw a error and stop building.
Change code in src/index.ts:

// export * from '@/two'
export * from './two'

Run pnpm build, it can build correctly.

Describe the bug

Refer to code:

Alias was not be respected in external check. So if using a alias instead of relative path, it will not enter this if statement.
The problem can be fixed by inlineDependencies option, but that may not be the user's intention. Refer to #376.

Additional context

No response

Logs

No response