Strange directory hierarchy in bcachefs DKMS packages

Hello,

The bcachefs DKMS packages from apt.bcachefs.org have a non-standard directory hierarchy that can cause problems. Instead of putting the source files directly in the DKMS source directory the packages use a "src/fs/bcachefs" subdirectory. This causes an issue when the module is installed using the standard kernel method like this:

     INSTALL_MOD_PATH=$(realpath "$WORK") INSTALL_MOD_DIR="dkms" \
          make -C "$hdir/" M="$sdir/" MO="$mdir/" modules_install
     
This causes the module to be installed at a nonstandard and unexpected path like this:

     /lib/modules/6.16.9-0-stable/dkms/src/fs/bcachefs/bcachefs.ko.gz

But it is expected that the module would be installed here:

     /lib/modules/6.16.9-0-stable/dkms/bcachefs.ko.gz

The problematic path may still work in some circumstances particularly when "modprobe" is used but may fail if "insmod" is used directly with the expected path.

I'm using the 1.31.3 version from apt.bcachefs.org. I downloaded the Arch DKMS package too and it has the same problem too.

Thanks,
Carl