[...]

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 80050K .......... ..                                         100%  333M=1.6s
2018-08-29 08:54:34 (49.2 MB/s) - 'boost_1_63_0.tar.bz2' saved [81984414/81984414]
Building target platforms: i686-linux
Wrote: /home/users/builder/rpm/SRPMS/boost-1.63.0-6.src.rpm
exit status 0
Tagging with prefix: auto/ti/
HEAD is now at 00851a5 - rel 6; fix build
fatal: HEAD does not point to a branch
No conditional flags passed
from available:
--with   :	
--without:	 numpy python2 python3
Writing git revision for tag auto/ti/boost-1.63.0-6
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.26810
+ umask 022
+ cd /home/users/builder/rpm/BUILD
+ rm -rf boost_1_63_0
Begin-TLD-Builder-Info
Build-Time: user:3.31s sys:0.45s real:9.71s (faults io:142 non-io:192144)
Files queued for ftp:
  81841742 boost-1.63.0-6.src.rpm
       184 boost-1.63.0-6.src.rpm.uploadinfo
End-TLD-Builder-Info