Error when using `npm-check-updates` js api after build by `unbuild`

[qmhc]

Related issue: https://github.com/raineorshine/npm-check-updates/issues/1204

Reproduction: https://github.com/qmhc/ncu-test

NCU author said it is an issue of unbuild, NCU works correctly as a module both in js and ts.

But I am not sure about this, currently I have used some packages and only found NCU will take errors.