Unable to build with built-in pipeline, it requires URP

[nothke]

The gui works fine in Editor with built-in pipeline, but when attempting to build, the shader seems to be looking for URP. I get these error messages:

Shader error in 'DearImGui/Mesh': failed to open source file: 'Packages/com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl' at /Projects/UNITY/PACKAGES/dear-imgui-unity-original/Resources/Shaders/PassesUniversal.hlsl(4) (on d3d11)

Shader error in 'DearImGui/Procedural': failed to open source file: 'Packages/com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl' at /Projects/UNITY/PACKAGES/dear-imgui-unity-original/Resources/Shaders/PassesUniversal.hlsl(4) (on d3d11)

Error building Player: 2 errors

[nothke]

Ok, it builds fine in "procedural" mode, but not in "mesh" mode.