[...]

   500K .......... .......... .......... .......... .......... 61% 10.7M 0s
   550K .......... .......... .......... .......... .......... 66% 11.6M 0s
   600K .......... .......... .......... .......... .......... 72% 2.59M 0s
   650K .......... .......... .......... .......... .......... 77% 10.0M 0s
   700K .......... .......... .......... .......... .......... 83% 11.4M 0s
   750K .......... .......... .......... .......... .......... 89% 11.6M 0s
   800K .......... .......... .......... .......... .......... 94% 10.8M 0s
   850K .......... .......... .......... .......... ........  100% 5.42M=0.3s
2015-07-27 18:26:02 (3.08 MB/s) - 'libpng-1.6.17.tar.xz' saved [919828/919828]
--2015-07-27 18:26:03--  http://distfiles.pld-linux.org/distfiles/by-md5/f/6/f68d34f10bcc7f43b8c3dce5708e1933/libpng-1.6.17-apng.patch.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: 10639 (10K) [application/x-gzip]
Saving to: 'libpng-1.6.17-apng.patch.gz'
     0K ..........                                            100% 23.3M=0s
2015-07-27 18:26:03 (23.3 MB/s) - 'libpng-1.6.17-apng.patch.gz' saved [10639/10639]
warning: Could not canonicalize hostname: giant
Building target platforms: i686-linux
Wrote: /home/users/builder/rpm/SRPMS/libpng-1.6.17-1.src.rpm
exit status 0
Tagging with prefix: auto/ti/
Already on 'master'
No conditional flags passed
from available:
--with   :	
--without:	 default_libpng tests
Writing git revision for tag auto/ti/libpng-1.6.17-1
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.42096
+ umask 022
+ cd /home/users/builder/rpm/BUILD
+ rm -rf libpng-1.6.17
Begin-PLD-Builder-Info
Build-Time: user:3.68s sys:2.38s real:12.95s (faults io:0 non-io:264446)
Files queued for ftp:
    950576 libpng-1.6.17-1.src.rpm
       185 libpng-1.6.17-1.src.rpm.uploadinfo
End-PLD-Builder-Info