The VMR pipeline will need to be updated to have unified build support for internal-only product builds. In that case, there will be dependencies on packages that are only available in internal feeds. This would require the use of the SetupNugetSources.sh script to mutate each repo's Nuget.config file.

Source build has such a dependency for testing only: dotnet/sdk#43041. But for UB, it's more extensive because it applies at build time and across multiple repos.