x86_64 breaks on MacOS M machines

Building the x86_64 tools on MacOS M silicon fails with:

config: tools/rtems-grub-2.06.cfg
grub2.cfg:11: "Darwin does not support Grub2 compilation by default."
grub2.cfg:12: "If you need Grub2 on Darwin, please install objconv"
grub2.cfg:13: "and enable it by removing '%undefine grub2_platform_supported' above"
config: tools/rtems-makefs-r12.cfg
package: makefs-v12-arm64-apple-darwin23.6.0-1
download: https://codeload.github.com/kusumi/makefs/tar.gz/r12 -> sources/makefs-r12.tar.gz
downloading: sources/makefs-r12.tar.gz - 646.2kB
building: makefs-v12-arm64-apple-darwin23.6.0-1
error: building makefs-v12-arm64-apple-darwin23.6.0-1
Build FAILED
  See error report: rsb-report-makefs-v12-arm64-apple-darwin23.6.0-1.txt
  Note: In some cases the error appears only in
  the complete build log (see --log option)
error: building makefs-v12-arm64-apple-darwin23.6.0-1

Why is grub being built?