Placeholder dll with different dependency results in build-error on target platform (WSA)

Hi

We're trying to build a project for the WSA target that uses some UWP specific libraries (that only work when the project is built) - let's call this WSAdep.dll. We use these libraries from our own plugin, call that X.dll. Now we also created a second version of this dll, X_stub.dll that uses different dependencies (Stubdep.dll) (these work locally on the PC, but not on our target device) - this dll has the same namespace and is set as a placeholder for X.dll in unity.

We are getting build errors when we build for the WSA target, as unity is complaining that X.dll is referencing Stubdep.dll: this is wrong, as only the placeholder X_stub.dll is referencing Stubdep.dll, but X.dll is not.

What can we do to fix this situation, while still working with placeholder dlls?