[...]

builder: SMP make flags are set to -j2
Cloning into 'libwacom'...
5104d87cfa76221839ef6c937f94ea938e69c675
Already on 'master'
Already up-to-date.
Available branches: master
Searching for tag auto/ti/libwacom-0.7.1-1...
Searching for tag auto/ti/libwacom-0_7_1-1...
--2014-08-01 05:49:06--  http://distfiles.pld-linux.org/distfiles/by-md5/d/1/d11981432144837a29ab2189a2fa0575/libwacom-0.7.1.tar.bz2
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: 402392 (393K) [application/x-bzip2]
Saving to: 'libwacom-0.7.1.tar.bz2'
     0K .......... .......... .......... .......... .......... 12%  156K 2s
    50K .......... .......... .......... .......... .......... 25%  130K 2s
   100K .......... .......... .......... .......... .......... 38%  142K 2s
   150K .......... .......... .......... .......... .......... 50%  142K 1s
   200K .......... .......... .......... .......... .......... 63%  142K 1s
   250K .......... .......... .......... .......... .......... 76%  142K 1s
   300K .......... .......... .......... .......... .......... 89%  130K 0s
   350K .......... .......... .......... .......... ..        100% 83.4K=3.0s
2014-08-01 05:49:09 (130 KB/s) - 'libwacom-0.7.1.tar.bz2' saved [402392/402392]
Building target platforms: i686-linux
Wrote: /home/users/builder/rpm/SRPMS/libwacom-0.7.1-1.src.rpm
exit status 0
Tagging with prefix: auto/ti/
Version: 0.7.1
Release: 1
tag: auto/ti/libwacom-0.7.1-1
Searching for tag auto/ti/libwacom-0.7.1-1...
To ssh://git@git.pld-linux.org/packages/libwacom
 * [new tag]         auto/ti/libwacom-0.7.1-1 -> auto/ti/libwacom-0.7.1-1
error: Macro %_builddir has empty body
error: Macro %_builddir has empty body
Executing(--clean):  env -i TMP=/home/users/builder/tmp PATH=/bin:/usr/bin:/usr/sbin:/sbin:/usr/X11R6/bin HOME=/home/users/builder TMPDIR=/home/users/builder/tmp  /bin/sh -e /home/users/builder/tmp/rpm-tmp.73520
+ umask 022
+ cd /home/users/builder/rpm/BUILD
+ rm -rf libwacom-0.7.1
Begin-PLD-Builder-Info
Build-Time: user:2.42s sys:1.17s real:9.95s (faults io:0 non-io:153509)
Files queued for ftp:
    407100 libwacom-0.7.1-1.src.rpm
       186 libwacom-0.7.1-1.src.rpm.uploadinfo
End-PLD-Builder-Info