[...]

 96950K .......... .......... .......... .......... .......... 99% 76.1M 0s
 97000K .......... .......... .......... .......... .......... 99% 74.1M 0s
 97050K .......... .......... .......... .......... .......... 99%  164M 0s
 97100K .......... .......... .......... .......... .......... 99% 49.0M 0s
 97150K .......... .......... .......... .......... .......... 99%  187M 0s
 97200K .......... .......... .......... .......... .......... 99% 8.35M 0s
 97250K .......... .......... .......... .......... .......... 99% 71.7M 0s
 97300K .......... .......... .......... .......... .......... 99% 71.3M 0s
 97350K .......... .......... .......... .......... .......... 99% 1.48M 0s
 97400K .......... .......... .......... .......... .......... 99% 44.2M 0s
 97450K .......... .......... .......... .......... .......... 99%  184M 0s
 97500K .......... .......... .......... .......... .......... 99% 78.2M 0s
 97550K .......... .......... .......... .......... .......... 99% 76.4M 0s
 97600K .......... .......... .......... .......... .......... 99%  100M 0s
 97650K .......... .......... .......... .......... .......... 99% 8.04M 0s
 97700K .......... .......... .......... .......... .......... 99% 62.7M 0s
 97750K .......... .......... .......                         100% 45.5M=5.6s
2019-12-07 19:11:12 (17.1 MB/s) - 'boost_1_71_0.tar.bz2' saved [100124647/100124647]
warning: Could not canonicalize hostname: giant
Building target platforms: i686-linux
Wrote: /home/users/builder/rpm/SRPMS/boost-1.71.0-4.src.rpm
exit status 0
Tagging with prefix: auto/ti/
HEAD is now at adf920b - rel 4; fix python 3.8 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-1.71.0-4
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.55698
+ umask 022
+ cd /home/users/builder/rpm/BUILD
+ rm -rf boost_1_71_0
Begin-TLD-Builder-Info
Build-Time: user:4.90s sys:1.00s real:15.64s (faults io:9 non-io:147703)
Files queued for ftp:
  99950078 boost-1.71.0-4.src.rpm
       184 boost-1.71.0-4.src.rpm.uploadinfo
End-TLD-Builder-Info