dosbox failed on x86_64 dockyard-devel (c64.arklinux.org)

dosbox failed to build on x86_64 for dockyard-devel.
Last 250 lines of build log:

warning: user arklinux does not exist - using root
Installing dosbox-0.72-1ark.src.rpm
Building target platforms: x86_64
Building for target x86_64
Executing(%prep): /bin/sh -e /var/tmp/rpm-tmp.87181
+ umask 022
+ cd /build-dosbox-x86_64/BUILD
+ cd /build-dosbox-x86_64/BUILD
+ rm -rf dosbox-0.72
+ tar -xf /usr/src/ark/SOURCES/dosbox-0.72.tar.lz
tar: lzmash: Cannot exec: No such file or directory
tar: Error is not recoverable: exiting now
tar: Child returned status 2
tar: Error exit delayed from previous errors
error: Bad exit status from /var/tmp/rpm-tmp.87181 (%prep)


RPM build errors:
    user arklinux does not exist - using root
    Bad exit status from /var/tmp/rpm-tmp.87181 (%prep)