Hey vagano,
That's an interesting corporate policy. You can't disable the self-updates (if a version of wyUpdate is required and can't be installed the update fails).
However, you can host your own copy of wyUpdate internally on your corporate intranet.
You can skip the part about compiling from source. Simply create a project in wyBuild and use the already compiled versions of wyUpdate.exe included with every version of wyBuild.
Tell me if this helps.