I have not been able to find any references to Windows builds, yet the simple check on line 407 with the $(OS) variable is causing warnings with every make command.

Windows containers on K8s are supported, even with the limitation that the control plane must run on Linux.

This runs into another rabbit hole as to whether support for Windows should be considered, or should this currently unused check be removed from the Makefile entirely.

Also, regarding that check, the architecture on a Windows system can be determined with
$env:PROCESSOR_ARCHITECTURE, however, Windows server on ARM is still in its very early stages, so for now it should not be an issue.