Per-configuration dependencies

I have a workspace with two projects, MyProj and MyLib.

MyProj uses code from MyLib, so I have established a dependency. It works. When I compile the Win32 Debug build of MyProj, the Win32 Debug build of My Lib is compiled if needed. Likewise for the Win32 Release builds.

I now want a slightly different look and behavior for MyProj. I have created Win32 MyProjMod Release and Win32 MyProjMod Debug configurations with some different settings.

The dependencies do not work. When I compile either of the MyProjMod builds, it is always the Win32 Debug build of MyLib that is compiled.

How do I fix this?

I see there is an Allow per-configuration dependencies checkbox in Project Settings / General, but it doesn't seem to help.