Build fails with "Shader error in 'BK/StandardLayered" when using a custom shader

Unity: Shader System

2022.3.X

2021.3.X

Please work with the asset author to resolve this issue.

How to reproduce:
1. Open the “sahderError“ project
2. Select FIle → Build and Run
3. Observe the Console

Expected result: The Build is successful
Actual result: The Build Fails

Reproducible with: 2021.3.47f1, 2022.3.55f1
Not reproducible with: 6000.0.34f1, 6000.1.0b2

Reproducible on: Windows 10, macOS 15.1.1 (Intel)
Not reproducible on: No other environment tested

Notes:

The Build is successful if it is attempted again after the errors
Re-extract the project after reproducing the issue
Could not find fixed version 6000.0.0b12 built successfully while 6000.0.0b11 did not, however, different errors were thrown