[...]

qemu-4.1.0-1
error: Macro %_builddir has empty body
error: Macro %_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.6579
+ umask 022
+ cd /home/users/builder/rpm/BUILD
+ rm -rf qemu-4.1.0
Begin-TLD-Builder-Info
Build-Time: user:2.62s sys:0.35s real:5.33s (faults io:0 non-io:186345)
Files queued for ftp:
  54039381 qemu-4.1.0-1.src.rpm
       182 qemu-4.1.0-1.src.rpm.uploadinfo
End-TLD-Builder-Info