[...]

./builder[2756]: ulimit: unlimited exceeds allowable coredump(blocks) limit
warning: line 123: It's not recommended to have unversioned Obsoletes: Obsoletes:	caching-nameserver
Building target platforms: x86_64-linux
Building for target x86_64-linux
Wrote: /home/users/builder/rpm/SRPMS/bind-9.18.25-1.src.rpm
RPM build warnings:
    line 123: It's not recommended to have unversioned Obsoletes: Obsoletes:	caching-nameserver
real 0.17
user 0.15
sys 0.01
exit status 0
Writing package revision
builder: SMP make flags are set to -j2
Already up to date.
warning: line 123: It's not recommended to have unversioned Obsoletes: Obsoletes:	caching-nameserver
No conditional flags passed
from available:
--with   :	 dnstap edns_cli epoll hip static_libs system_tests tests
--without:	 doh epoll geoip kerberos5 lmdb ssl
Available branches: AC-branch BIND9 BIND_9_10 DEVEL RA-branch master
bind-9.18.25.tar.xz having proper md5sum already exists
bind-non-english-man-pages.tar.bz2 having proper md5sum already exists
bind-hip.tar.gz having proper md5sum already exists
named.root having proper md5sum already exists
./builder[2756]: ulimit: unlimited exceeds allowable coredump(blocks) limit
warning: line 123: It's not recommended to have unversioned Obsoletes: Obsoletes:	caching-nameserver
Building target platforms: x86_64-linux
Building for target x86_64-linux
Wrote: /home/users/builder/rpm/SRPMS/bind-9.18.25-1.src.rpm
RPM build warnings:
    line 123: It's not recommended to have unversioned Obsoletes: Obsoletes:	caching-nameserver
real 0.18
user 0.17
sys 0.01
warning: line 123: It's not recommended to have unversioned Obsoletes: Obsoletes:	caching-nameserver
Writing git revision for tag tld/bind-9.18.25-1
error: Macro %_builddir has empty body
Begin-TLD-Builder-Info
Build-Time: user:2.47s sys:0.59s real:5.72s (faults io:6 non-io:500583)
Files queued for ftp:
   5601527 bind-9.18.25-1.src.rpm
       184 bind-9.18.25-1.src.rpm.uploadinfo
End-TLD-Builder-Info