[...]

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: 614692 (600K) [application/x-bzip2]
Saving to: 'lttng-ust-2.6.0.tar.bz2'
     0K .......... .......... .......... .......... ..........  8%  761K 1s
    50K .......... .......... .......... .......... .......... 16% 1.45M 0s
   100K .......... .......... .......... .......... .......... 24% 1.48M 0s
   150K .......... .......... .......... .......... .......... 33% 1.54M 0s
   200K .......... .......... .......... .......... .......... 41% 10.9M 0s
   250K .......... .......... .......... .......... .......... 49% 1.63M 0s
   300K .......... .......... .......... .......... .......... 58% 11.5M 0s
   350K .......... .......... .......... .......... .......... 66% 10.9M 0s
   400K .......... .......... .......... .......... .......... 74% 1.82M 0s
   450K .......... .......... .......... .......... .......... 83% 11.2M 0s
   500K .......... .......... .......... .......... .......... 91% 11.4M 0s
   550K .......... .......... .......... .......... .......... 99% 11.6M 0s
   600K                                                       100%  544G=0.2s
2015-04-06 10:26:16 (2.37 MB/s) - 'lttng-ust-2.6.0.tar.bz2' saved [614692/614692]
warning: Could not canonicalize hostname: giant
Building target platforms: i686-linux
Wrote: /home/users/builder/rpm/SRPMS/lttng-ust-2.6.0-4.src.rpm
exit status 0
Tagging with prefix: auto/ti/
Already on 'master'
No conditional flags passed
from available:
--with   :	
--without:	 java systemtap
Writing git revision for tag auto/ti/lttng-ust-2.6.0-4
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.73678
+ umask 022
+ cd /home/users/builder/rpm/BUILD
+ rm -rf lttng-ust-2.6.0
Begin-PLD-Builder-Info
Build-Time: user:2.83s sys:1.50s real:8.12s (faults io:151 non-io:216890)
Files queued for ftp:
    621808 lttng-ust-2.6.0-4.src.rpm
       187 lttng-ust-2.6.0-4.src.rpm.uploadinfo
End-PLD-Builder-Info