[...]

 94650K .......... .......... .......... .......... .......... 99% 31.8M 0s
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 95050K .......... .......... .......... .......... .......... 99% 31.7M 0s
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 95300K .......... .......... .......... .......... .......... 99% 1.36M 0s
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 95550K .......... .......... .......... .......... ..        100% 32.3M=9.7s
2019-05-29 10:16:44 (9.65 MB/s) - 'boost_1_70_0.tar.bz2' saved [97887058/97887058]
warning: Could not canonicalize hostname: giant
Building target platforms: i686-linux
Wrote: /home/users/builder/rpm/SRPMS/boost-1.70.0-2.src.rpm
exit status 0
Tagging with prefix: auto/ti/
Already on 'master'
No conditional flags passed
from available:
--with   :	
--without:	 numpy python2 python3
Writing git revision for tag auto/ti/boost-1.70.0-2
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.19088
+ umask 022
+ cd /home/users/builder/rpm/BUILD
+ rm -rf boost_1_70_0
Begin-TLD-Builder-Info
Build-Time: user:3.96s sys:0.65s real:20.00s (faults io:129 non-io:156764)
Files queued for ftp:
  97740288 boost-1.70.0-2.src.rpm
       184 boost-1.70.0-2.src.rpm.uploadinfo
End-TLD-Builder-Info