Build fails on non UNIX systems

[Jason Watson]

Did you read the migration guide?

• I have read the whole migration guide

Is there an existing issue that is already proposing this?

• I have searched the existing issues

Potential Commit/PR that introduced the regression

PR #727

Versions

No response

Describe the regression

Package fails to build on Windows.

Minimum reproduction code

npm run build

Expected behavior

Package builds on Windows.

Other

No response

[Kamil Mysliwiec]

Let's track this here #727