[...]

 15050K .......... .......... .......... .......... .......... 94%  176M 0s
 15100K .......... .......... .......... .......... .......... 94% 6.43M 0s
 15150K .......... .......... .......... .......... .......... 94% 12.2M 0s
 15200K .......... .......... .......... .......... .......... 95% 30.4M 0s
 15250K .......... .......... .......... .......... .......... 95% 28.4M 0s
 15300K .......... .......... .......... .......... .......... 95% 28.2M 0s
 15350K .......... .......... .......... .......... .......... 96% 74.1M 0s
 15400K .......... .......... .......... .......... .......... 96% 63.8M 0s
 15450K .......... .......... .......... .......... .......... 96% 70.6M 0s
 15500K .......... .......... .......... .......... .......... 97% 94.7M 0s
 15550K .......... .......... .......... .......... .......... 97% 70.9M 0s
 15600K .......... .......... .......... .......... .......... 97%  270M 0s
 15650K .......... .......... .......... .......... .......... 98% 4.19M 0s
 15700K .......... .......... .......... .......... .......... 98%  105M 0s
 15750K .......... .......... .......... .......... .......... 98% 26.1M 0s
 15800K .......... .......... .......... .......... .......... 99% 53.8M 0s
 15850K .......... .......... .......... .......... .......... 99% 32.2M 0s
 15900K .......... .......... .......... .......... .......... 99% 63.1M 0s
 15950K .......... .......... .......... .......... .......... 99% 50.6M 0s
 16000K ........                                              100% 23.3M=0.7s
2018-03-12 16:09:08 (22.4 MB/s) - 'go1.9.4.src.tar.gz' saved [16392325/16392325]
Building target platforms: i686-linux
Wrote: /home/users/builder/rpm/SRPMS/golang-1.9.4-1.src.rpm
exit status 0
Tagging with prefix: auto/ti/
Already on 'master'
No conditional flags passed
from available:
--with   :	 bootstrap
--without:	 cgo ext_linker shared tests verbose
Writing git revision for tag auto/ti/golang-1.9.4-1
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.36580
+ umask 022
+ cd /home/users/builder/rpm/BUILD
+ rm -rf golang-1.9.4
Begin-TLD-Builder-Info
Build-Time: user:1.34s sys:0.31s real:4.93s (faults io:2 non-io:110246)
Files queued for ftp:
  16300981 golang-1.9.4-1.src.rpm
       184 golang-1.9.4-1.src.rpm.uploadinfo
End-TLD-Builder-Info