[...]

Searching for tag auto/ti/expat-2_1_0-2...
--2015-07-15 22:53:58--  http://distfiles.pld-linux.org/distfiles/by-md5/d/d/dd7dab7a5fea97d2a6a43f511449b7cd/expat-2.1.0.tar.gz
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: 562616 (549K) [application/x-gzip]
Saving to: 'expat-2.1.0.tar.gz'
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2015-07-15 22:53:59 (2.61 MB/s) - 'expat-2.1.0.tar.gz' saved [562616/562616]
warning: Could not canonicalize hostname: giant
Building target platforms: i686-linux
Wrote: /home/users/builder/rpm/SRPMS/expat-2.1.0-2.src.rpm
exit status 0
Tagging with prefix: auto/ti/
Already on 'master'
No conditional flags passed
from available:
--with   :	
--without:	 static_libs
Writing git revision for tag auto/ti/expat-2.1.0-2
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.91472
+ umask 022
+ cd /home/users/builder/rpm/BUILD
+ rm -rf expat-2.1.0
Begin-PLD-Builder-Info
Build-Time: user:3.93s sys:1.48s real:6.51s (faults io:0 non-io:226062)
Files queued for ftp:
    571297 expat-2.1.0-2.src.rpm
       189 expat-2.1.0-2.src.rpm.uploadinfo
End-PLD-Builder-Info