[...]

cro %_builddir has empty body
Executing(--clean): env -i TMP=/home/users/builder/tmp HOME=/home/users/builder PATH=/bin:/usr/bin:/usr/sbin:/sbin:/usr/X11R6/bin TMPDIR=/home/users/builder/tmp  /bin/sh -e /home/users/builder/tmp/rpm-tmp.4109
+ umask 022
+ cd /home/users/builder/rpm/BUILD
+ rm -rf linux-libc-headers-4.4.0
Begin-PLD-Builder-Info
Build-Time: user:17.29s sys:6.40s real:37.31s (faults io:176 non-io:348710)
Files queued for ftp:
  87342318 linux-libc-headers-4.4.0-1.src.rpm
       196 linux-libc-headers-4.4.0-1.src.rpm.uploadinfo
End-PLD-Builder-Info