V4 is working on Linux in Docker so the package must be installable if they are able to build containers. Did you install .NET in the OS? V4 no longer uses mono since .NET has been ported to Linux. It’s possible (although unlikely) the broken package is about a missing dependency. If you get a chance you could probably add the target V4 package version as well as the OS details to your post as I’m sure the build and upgrade guys are going to want that info in order to respond.