Shader errors originating in URP LitForwardPass

I’m not sure how to begin debugging this issue… one of my shaders includes LitForwardPass.hlsl and is encountering these two errors in the library code:

Shader error in ‘myproject/EnemyShader’: ‘OutputAlpha’: no matching 2 parameter function at /myproject/Library/PackageCache/com.unity.render-pipelines.universal@10.2.2/Shaders/LitForwardPass.hlsl(176) (on d3d11)

Shader error in ‘myproject/EnemyShader’: undeclared identifier ‘_Surface’ at /myproject/Library/PackageCache/com.unity.render-pipelines.universal@10.2.2/Shaders/LitForwardPass.hlsl(176) (on d3d11)

Ah, I think I’ve solved the problem. I was creating my own set of inputs to replace LitInput.hlsl and a few have been added in 10.2.2 that weren’t in my code.