[...]

   200K .......... .......... .......... .......... .......... 46% 5.76M 0s
   250K .......... .......... .......... .......... .......... 56% 11.6M 0s
   300K .......... .......... .......... .......... .......... 65% 11.5M 0s
   350K .......... .......... .......... .......... .......... 74% 10.9M 0s
   400K .......... .......... .......... .......... .......... 84% 10.8M 0s
   450K .......... .......... .......... .......... .......... 93% 11.5M 0s
   500K .......... .......... .......... ....                 100% 11.3M=0.08s
2015-04-28 11:23:38 (6.32 MB/s) - 'iptables-1.4.21.tar.bz2' saved [547439/547439]
--2015-04-28 11:23:38--  http://df.tld-linux.org/distfiles/by-md5/2/e/2ed2b452daefe70ededd75dc0061fd07/iptables-howtos.tar.bz2
Resolving df.tld-linux.org (df.tld-linux.org)... 46.4.78.55
Connecting to df.tld-linux.org (df.tld-linux.org)|46.4.78.55|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 56677 (55K) [application/x-bzip2]
Saving to: 'iptables-howtos.tar.bz2'
     0K .......... .......... .......... .......... .......... 90% 1.79M 0s
    50K .....                                                 100% 18.7M=0.03s
2015-04-28 11:23:38 (1.96 MB/s) - 'iptables-howtos.tar.bz2' saved [56677/56677]
warning: Could not canonicalize hostname: giant
Building target platforms: i686-linux
Wrote: /home/users/builder/rpm/SRPMS/iptables-1.4.21-3.src.rpm
exit status 0
Tagging with prefix: auto/ti/
Already on 'master'
No conditional flags passed
from available:
--with   :	 batch ipt_IPV4OPTSSTRIP ipt_rpc static usekernelsrc vserver xt_layer7
--without:	 dist_kernel doc pcap
Writing git revision for tag auto/ti/iptables-1.4.21-3
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.38567
+ umask 022
+ cd /home/users/builder/rpm/BUILD
+ rm -rf iptables-1.4.21
Begin-PLD-Builder-Info
Build-Time: user:3.70s sys:2.67s real:6.12s (faults io:0 non-io:448222)
Files queued for ftp:
    637315 iptables-1.4.21-3.src.rpm
       187 iptables-1.4.21-3.src.rpm.uploadinfo
End-PLD-Builder-Info