Build target error with absolute build output paths

Product

Strawberry Shake

Version

13.9.6

Link to minimal reproduction

https://github.com/ir-dev/bug-repro_strawberry-shake_absolute-build-output-paths

Steps to reproduce

Build the project

What is expected?

Build should be successful with the absolute build output paths being recognised correctly

What is actually happening?

Build fails when using artifacts output layout with defaults as described in https://learn.microsoft.com/en-us/dotnet/core/sdk/artifacts-output. That means a Directory.Build.props file with UseArtifactsOutput property set to true will use actually legitimate absolute paths set as common build project paths which StrawberryShake.Server.targets expects to be relative.

If a relative path is set for ArtifactsPath property which otherwise uses this default $(MSBuildThisFileDirectory)artifacts then it would work again.

Relevant log output

strawberryshake.server\13.9.6\build\StrawberryShake.Server.targets(85,5): 'C:\Users\johndoe\source\repos\bug-repro_strawberry-shake_absolute-build-output-paths\Demo\C:\Users\johndoe\source\repos\bug-repro_strawberry-shake_absolute
-build-output-paths\artifacts\obj\Demo\debug\berry'

Additional context

No response

Start with the minimal reproduction and inspect StrawberryShake.Server.targets at line 85, then compare its path handling with the Directory.Build.props settings described in the issue. Build the reproduction using the artifacts output layout and verify that the build succeeds when absolute output paths are used.