[...]

builder: SMP make flags are set to -j2
Cloning into 'xorg-lib-libXtst'...
From git://git.pld-linux.org/packages/xorg-lib-libXtst
 * [new ref]         refs/notes/commits -> refs/notes/commits
c0014bfea46be85da32937c73a4ea57e4f7ea406
Already on 'master'
Your branch is up-to-date with 'origin/master'.
Already up-to-date.
Available branches: master
Searching for tag auto/ti/xorg-lib-libXtst-1.2.2-2...
Searching for tag auto/ti/xorg-lib-libXtst-1_2_2-2...
--2015-05-08 12:41:13--  http://distfiles.pld-linux.org/distfiles/by-md5/2/5/25c6b366ac3dc7a12c5d79816ce96a59/libXtst-1.2.2.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: 321784 (314K) [application/x-bzip2]
Saving to: 'libXtst-1.2.2.tar.bz2'
     0K .......... .......... .......... .......... .......... 15%  822K 0s
    50K .......... .......... .......... .......... .......... 31%  847K 0s
   100K .......... .......... .......... .......... .......... 47% 10.9M 0s
   150K .......... .......... .......... .......... .......... 63% 1.64M 0s
   200K .......... .......... .......... .......... .......... 79% 1.75M 0s
   250K .......... .......... .......... .......... .......... 95% 11.0M 0s
   300K .......... ....                                       100% 13.0M=0.2s
2015-05-08 12:41:13 (1.64 MB/s) - 'libXtst-1.2.2.tar.bz2' saved [321784/321784]
warning: Could not canonicalize hostname: giant
Building target platforms: i686-linux
Wrote: /home/users/builder/rpm/SRPMS/xorg-lib-libXtst-1.2.2-2.src.rpm
exit status 0
Tagging with prefix: auto/ti/
Already on 'master'
Writing git revision for tag auto/ti/xorg-lib-libXtst-1.2.2-2
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.13360
+ umask 022
+ cd /home/users/builder/rpm/BUILD
+ rm -rf libXtst-1.2.2
Begin-PLD-Builder-Info
Build-Time: user:2.82s sys:1.44s real:5.30s (faults io:0 non-io:194427)
Files queued for ftp:
    327368 xorg-lib-libXtst-1.2.2-2.src.rpm
       194 xorg-lib-libXtst-1.2.2-2.src.rpm.uploadinfo
End-PLD-Builder-Info