Arch KDE cannot be built with CROSTINI

[MaluNoPeleke]

I try to build arch with KDE but get this error message in the compilation process:

(12/12) Updating the info directory file...
umount: /tmp/arch/mnt: block devices are not permitted on filesystem.
umount: /tmp/arch: block devices are not permitted on filesystem.
rm: cannot remove '/tmp/arch/mnt': Device or resource busy
chroot: failed to run command ‘/bin/sh’: No such file or directory
chroot: failed to run command ‘/bin/sh’: No such file or directory

I have tried this directly from Crostini with the feature active.

[YeesterPlus]

niether can debian kde, I'll use gnome as a base then I will swith to KDE

[YeesterPlus]

https://github.com/cb-linux/breath/issues/325