[...]

 82350K .......... .......... .......... .......... .......... 99% 36.0M 0s
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 82900K .......... .......... .......... .......... .......... 99% 36.2M 0s
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 83200K .....                                                 100%  113M=1.6s
2017-04-10 05:46:29 (51.5 MB/s) - 'boost_1_61_0.tar.bz2' saved [85202254/85202254]
Building target platforms: i686-linux
Wrote: /home/users/builder/rpm/SRPMS/boost-1.61.0-6.src.rpm
exit status 0
Tagging with prefix: auto/ti/
HEAD is now at c358470... - rebuild with icu 58.2 - release 6 (by relup.sh)
fatal: HEAD does not point to a branch
No conditional flags passed
from available:
--with   :	
--without:	 python2 python3
Writing git revision for tag auto/ti/boost-1.61.0-6
On detached HEAD. Use -r BRANCHNAME to override
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.82129
+ umask 022
+ cd /home/users/builder/rpm/BUILD
+ rm -rf boost_1_61_0
Begin-TLD-Builder-Info
Build-Time: user:4.12s sys:1.35s real:9.85s (faults io:64 non-io:139435)
Files queued for ftp:
  85078328 boost-1.61.0-6.src.rpm
       184 boost-1.61.0-6.src.rpm.uploadinfo
End-TLD-Builder-Info