[...]

Resolving distfiles.pld-linux.org (distfiles.pld-linux.org)... 193.239.45.41
Connecting to distfiles.pld-linux.org (distfiles.pld-linux.org)|193.239.45.41|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 693932 (678K) [application/octet-stream]
Saving to: 'libwnck-3.20.1.tar.xz'
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   650K .......... .......... .......                         100%  100M=0.1s
2017-04-05 12:55:38 (5.61 MB/s) - 'libwnck-3.20.1.tar.xz' saved [693932/693932]
Building target platforms: i686-linux
Wrote: /home/users/builder/rpm/SRPMS/libwnck-3.20.1-1.src.rpm
exit status 0
Tagging with prefix: auto/ti/
Already on 'master'
No conditional flags passed
from available:
--with   :	
--without:	 apidocs static_libs
Writing git revision for tag auto/ti/libwnck-3.20.1-1
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.8625
+ umask 022
+ cd /home/users/builder/rpm/BUILD
+ rm -rf libwnck-3.20.1
Begin-TLD-Builder-Info
Build-Time: user:0.60s sys:0.17s real:2.08s (faults io:0 non-io:91252)
Files queued for ftp:
    700385 libwnck-3.20.1-1.src.rpm
       186 libwnck-3.20.1-1.src.rpm.uploadinfo
End-TLD-Builder-Info