[...]

building SRPM using: cd rpm/packages; nice -n 0 ./builder -nu -nm --nodeps --http -bs  -r HEAD  -Tp auto/ti/ -tt  xorg-lib-libXfixes.spec 2>&1
builder: SMP make flags are set to -j2
Cloning into 'xorg-lib-libXfixes'...
From git://git.pld-linux.org/packages/xorg-lib-libXfixes
 * [new ref]         refs/notes/commits -> refs/notes/commits
0eef0c45b172e6f064f6d502dea5a98a0b9fd31f
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-libXfixes-5.0.1-2...
Searching for tag auto/ti/xorg-lib-libXfixes-5_0_1-2...
--2015-05-08 12:38:13--  http://distfiles.pld-linux.org/distfiles/by-md5/b/9/b985b85f8b9386c85ddcfe1073906b4d/libXfixes-5.0.1.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: 291978 (285K) [application/x-bzip2]
Saving to: 'libXfixes-5.0.1.tar.bz2'
     0K .......... .......... .......... .......... .......... 17%  815K 0s
    50K .......... .......... .......... .......... .......... 35% 1.52M 0s
   100K .......... .......... .......... .......... .......... 52% 1.59M 0s
   150K .......... .......... .......... .......... .......... 70% 1.64M 0s
   200K .......... .......... .......... .......... .......... 87% 12.0M 0s
   250K .......... .......... .......... .....                100% 1.31M=0.2s
2015-05-08 12:38:13 (1.51 MB/s) - 'libXfixes-5.0.1.tar.bz2' saved [291978/291978]
warning: Could not canonicalize hostname: giant
Building target platforms: i686-linux
Wrote: /home/users/builder/rpm/SRPMS/xorg-lib-libXfixes-5.0.1-2.src.rpm
exit status 0
Tagging with prefix: auto/ti/
Already on 'master'
Writing git revision for tag auto/ti/xorg-lib-libXfixes-5.0.1-2
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.4802
+ umask 022
+ cd /home/users/builder/rpm/BUILD
+ rm -rf libXfixes-5.0.1
Begin-PLD-Builder-Info
Build-Time: user:2.78s sys:1.42s real:5.21s (faults io:0 non-io:194856)
Files queued for ftp:
    297114 xorg-lib-libXfixes-5.0.1-2.src.rpm
       196 xorg-lib-libXfixes-5.0.1-2.src.rpm.uploadinfo
End-PLD-Builder-Info