[...]

Connecting to distfiles.pld-linux.org (distfiles.pld-linux.org)|193.239.45.41|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 764027 (746K) [application/x-bzip2]
Saving to: 'lttng-ust-2.9.0.tar.bz2'
     0K .......... .......... .......... .......... ..........  6% 1.01M 1s
    50K .......... .......... .......... .......... .......... 13% 2.04M 0s
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   650K .......... .......... .......... .......... .......... 93%  169M 0s
   700K .......... .......... .......... .......... ......    100%  162M=0.1s
2017-07-04 19:23:43 (5.87 MB/s) - 'lttng-ust-2.9.0.tar.bz2' saved [764027/764027]
Building target platforms: i686-linux
Wrote: /home/users/builder/rpm/SRPMS/lttng-ust-2.9.0-1.src.rpm
exit status 0
Tagging with prefix: auto/ti/
Already on 'master'
No conditional flags passed
from available:
--with   :	
--without:	 java python systemtap
Writing git revision for tag auto/ti/lttng-ust-2.9.0-1
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.42394
+ umask 022
+ cd /home/users/builder/rpm/BUILD
+ rm -rf lttng-ust-2.9.0
Begin-TLD-Builder-Info
Build-Time: user:0.83s sys:0.27s real:2.84s (faults io:5 non-io:118734)
Files queued for ftp:
    772585 lttng-ust-2.9.0-1.src.rpm
       187 lttng-ust-2.9.0-1.src.rpm.uploadinfo
End-TLD-Builder-Info