[...]

  3800K .......... .......... .......... .......... .......... 80%  154M 0s
  3850K .......... .......... .......... .......... .......... 81%  125M 0s
  3900K .......... .......... .......... .......... .......... 82% 71.2M 0s
  3950K .......... .......... .......... .......... .......... 84% 68.2M 0s
  4000K .......... .......... .......... .......... .......... 85%  265M 0s
  4050K .......... .......... .......... .......... .......... 86%  108M 0s
  4100K .......... .......... .......... .......... .......... 87% 85.7M 0s
  4150K .......... .......... .......... .......... .......... 88% 75.8M 0s
  4200K .......... .......... .......... .......... .......... 89%  294M 0s
  4250K .......... .......... .......... .......... .......... 90%  139M 0s
  4300K .......... .......... .......... .......... .......... 91% 84.8M 0s
  4350K .......... .......... .......... .......... .......... 92% 71.2M 0s
  4400K .......... .......... .......... .......... .......... 93% 81.5M 0s
  4450K .......... .......... .......... .......... .......... 94% 76.8M 0s
  4500K .......... .......... .......... .......... .......... 95%  283M 0s
  4550K .......... .......... .......... .......... .......... 96% 90.3M 0s
  4600K .......... .......... .......... .......... .......... 97% 87.4M 0s
  4650K .......... .......... .......... .......... .......... 98%  109M 0s
  4700K .......... .......... .......... .......... .......... 99% 84.0M 0s
  4750K .........                                             100%  321M=0.05s
2018-05-01 18:31:23 (95.9 MB/s) - 'ruby-1.8.7-p330.tar.gz' saved [4873383/4873383]
Building target platforms: i686-linux
Wrote: /home/users/builder/rpm/SRPMS/ruby-2.3.7-1.src.rpm
exit status 0
Tagging with prefix: auto/ti/
Already on 'master'
No conditional flags passed
from available:
--with   :	 bootstrap tests tk
--without:	 batteries default_ruby doc
Writing git revision for tag auto/ti/ruby-2.3.7-1
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.10332
+ umask 022
+ cd /home/users/builder/rpm/BUILD
+ rm -rf ruby-2.3.7
Begin-TLD-Builder-Info
Build-Time: user:3.79s sys:1.05s real:7.56s (faults io:23 non-io:230781)
Files queued for ftp:
  62974746 ruby-2.3.7-1.src.rpm
       182 ruby-2.3.7-1.src.rpm.uploadinfo
End-TLD-Builder-Info