he produced merged manifest has the wrong VMR build number right now: ".
See https://github.com/dotnet/installer/blob/58e4c4f2e4fc66597ebf4ff54809dc88f286e217/src/SourceBuild/content/build.proj#L42 & https://github.com/dotnet/installer/blob/58e4c4f2e4fc66597ebf4ff54809dc88f286e217/src/SourceBuild/content/Directory.Build.props#L221
The VmrBuildNumber property has a typo in it, the trailing ". If I remove that, then I get errors that VmrBuildNumber isn't set. This makes me assume that BUILD_BUILDNUMBER isn't set.
@dkurepa