libarchive 3.3.1-5 has empty mtree file

[KenM]

Binary package libarchive-3.3.1-5-armv7h.pkg.tar.xz available on the mirrors has an empty .MTREE file.
Rebuilding the package manually from source fixes the problem.

[x010]

Is there a fix for this package?

Trying to install to a new target but can't get past the error (error while reading mtree of package /mnt/var/cache/pacman/pkg/libarchive-3.3.1-5-arm.pkg.tar.xz: Unrecognized archive format) for the base system.