[...]

 67750K .......... .......... .......... .......... .......... 98%  224M 0s
 67800K .......... .......... .......... .......... .......... 98% 90.2M 0s
 67850K .......... .......... .......... .......... .......... 98%  240M 0s
 67900K .......... .......... .......... .......... .......... 98%  111M 0s
 67950K .......... .......... .......... .......... .......... 98%  243M 0s
 68000K .......... .......... .......... .......... .......... 98%  210M 0s
 68050K .......... .......... .......... .......... .......... 99%  226M 0s
 68100K .......... .......... .......... .......... .......... 99%  214M 0s
 68150K .......... .......... .......... .......... .......... 99%  248M 0s
 68200K .......... .......... .......... .......... .......... 99%  208M 0s
 68250K .......... .......... .......... .......... .......... 99%  245M 0s
 68300K .......... .......... .......... .......... .......... 99%  207M 0s
 68350K .......... .......... .......... .......... .......... 99%  249M 0s
 68400K .......... .......... .......... .......... .......... 99%  250M 0s
 68450K .......... .......... .......... .......... .......... 99%  203M 0s
 68500K .......... .......... .......... .......... .......... 99%  214M 0s
 68550K .......... .......... .......... .......... .......... 99%  257M 0s
 68600K .......... .......... .......... .......... .......... 99%  248M 0s
 68650K .......... .......... .......... .......... .......... 99%  253M 0s
 68700K .......... .......... .......... .........            100%  188M=1.1s
2018-05-01 19:52:52 (58.6 MB/s) - 'boost_1_59_0.tar.bz2' saved [70389425/70389425]
Building target platforms: i686-linux
Wrote: /home/users/builder/rpm/SRPMS/mysql-5.7.21-21.1.src.rpm
exit status 0
Tagging with prefix: auto/ti/
Already on 'master'
No conditional flags passed
from available:
--with   :	 autodeps ndb sphinx system_boost systemtap tests
--without:	 big_tables federated innodb raid rocksdb ssl tcpd tokudb
Writing git revision for tag auto/ti/mysql-5.7.21-21.1
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.45817
+ umask 022
+ cd /home/users/builder/rpm/BUILD
+ rm -rf percona-server-5.7.21-21
Begin-TLD-Builder-Info
Build-Time: user:7.06s sys:2.84s real:20.00s (faults io:72 non-io:349254)
Files queued for ftp:
 146770062 mysql-5.7.21-21.1.src.rpm
       187 mysql-5.7.21-21.1.src.rpm.uploadinfo
End-TLD-Builder-Info