Parcel build fails with 5.3.0-alpha1

Created by: renspr

Prerequisites

• I have searched for duplicate or closed issues
• I have validated any HTML to avoid common problems
• I have read the contributing guidelines

Describe the issue

If I setup a Parcel project as described here https://getbootstrap.com/docs/5.3/getting-started/parcel/ the scss build fails when using bootstrap 5.3.0-alpha1.

🚨 Build failed.

@parcel/transformer-css: Invalid state

  /bootstrap_parcel_test/src/scss/styles.scss:2511:29
    2510 | }
  > 2511 | .form-floating::before:not(.form-control:disabled) {
  >      |                             ^
    2512 |   position: absolute;
    2513 |   top: var(--bs-border-width);

Reduced test cases

Setup as described here: https://getbootstrap.com/docs/5.3/getting-started/parcel/ with 5.3.0-alpha1

What operating system(s) are you seeing the problem on?

macOS

What browser(s) are you seeing the problem on?

Chrome

What version of Bootstrap are you using?

v5.3.0-alpha1