[...]

 14000K .......... .......... .......... .......... .......... 93% 17.0M 0s
 14050K .......... .......... .......... .......... .......... 94%  224M 0s
 14100K .......... .......... .......... .......... .......... 94%  315M 0s
 14150K .......... .......... .......... .......... .......... 94%  345M 0s
 14200K .......... .......... .......... .......... .......... 95%  358M 0s
 14250K .......... .......... .......... .......... .......... 95%  301M 0s
 14300K .......... .......... .......... .......... .......... 95%  351M 0s
 14350K .......... .......... .......... .......... .......... 96%  347M 0s
 14400K .......... .......... .......... .......... .......... 96%  344M 0s
 14450K .......... .......... .......... .......... .......... 96%  272M 0s
 14500K .......... .......... .......... .......... .......... 97% 6.79M 0s
 14550K .......... .......... .......... .......... .......... 97%  250M 0s
 14600K .......... .......... .......... .......... .......... 97%  297M 0s
 14650K .......... .......... .......... .......... .......... 98%  350M 0s
 14700K .......... .......... .......... .......... .......... 98%  341M 0s
 14750K .......... .......... .......... .......... .......... 98%  295M 0s
 14800K .......... .......... .......... .......... .......... 99% 11.8M 0s
 14850K .......... .......... .......... .......... .......... 99%  326M 0s
 14900K .......... .......... .......... .......... .......... 99%  301M 0s
 14950K .......... .                                          100%  357M=0.4s
2017-04-05 12:38:04 (37.0 MB/s) - 'go1.8.src.tar.gz' saved [15320083/15320083]
Building target platforms: i686-linux
Wrote: /home/users/builder/rpm/SRPMS/golang-1.8-1.src.rpm
exit status 0
Tagging with prefix: auto/ti/
Already on 'master'
No conditional flags passed
from available:
--with   :	
--without:	 cgo ext_linker shared tests verbose
Writing git revision for tag auto/ti/golang-1.8-1
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.17507
+ umask 022
+ cd /home/users/builder/rpm/BUILD
+ rm -rf golang-1.8
Begin-TLD-Builder-Info
Build-Time: user:1.27s sys:0.44s real:3.99s (faults io:1 non-io:109796)
Files queued for ftp:
  15246216 golang-1.8-1.src.rpm
       182 golang-1.8-1.src.rpm.uploadinfo
End-TLD-Builder-Info