System.Runtime.CompilerServices.Unsafe.dll is missing building runtime/libs with VS2022 #62064

Description

I'm having a issue building libraries / tests after builing runtime as specified in the contribution workflow doc :
build.cmd clr+libs -rc Release
Got an error message complaining about
\System.Runtime.CompilerServices.Unsafe\ref\net462-Debug\System.Runtime.CompilerServices.Unsafe.dll'
could not be found System.Text.RegularExpressions.Tests (net7.0)

Does the same for every lib project I try to compile.

Reproduction Steps

1. build.cmd clr+libs -rc Release
2. build.cmd -vs System.Text.RegularExpressions (or any other lib)
3. build test project with VS

Expected behavior

No error message when building test project

Actual behavior

Error, build fails complaining about net462-Debug\System.Runtime.CompilerServices.Unsafe.dll

Regression?

No response

Known Workarounds

Compiling with pushd ..\src & dotnet build & popd & dotnet build /t:test works.
Starts to work if I remove $(NetFrameworkMinimum) in $(NetCoreAppMinimum);

Configuration

Windows 10
VS2022 x64

Other information

No response