[...]

builder: SMP make flags are set to -j2
Already up to date.
warning: line 83: It's not recommended to have unversioned Obsoletes: Obsoletes:	smtpdaemon
warning: Macro expanded in comment on line 414: %{_sysconfdir}/postfix/regexp_table
warning: Macro expanded in comment on line 419: %{_sysconfdir}/postfix/*.db
No conditional flags passed
from available:
--with   :	
--without:	 cdb epoll ldap lmdb mysql pgsql sasl sqlite ssl
Available branches: TLD-2018 master postfix-3.5
postfix-3.8.6.tar.gz having proper md5sum already exists
./builder[2756]: ulimit: unlimited exceeds allowable coredump(blocks) limit
warning: line 83: It's not recommended to have unversioned Obsoletes: Obsoletes:	smtpdaemon
warning: Macro expanded in comment on line 414: %{_sysconfdir}/postfix/regexp_table
warning: Macro expanded in comment on line 419: %{_sysconfdir}/postfix/*.db
Building target platforms: x86_64-linux
Building for target x86_64-linux
Wrote: /home/users/builder/rpm/SRPMS/postfix-3.8.6-1.1.src.rpm
RPM build warnings:
    line 83: It's not recommended to have unversioned Obsoletes: Obsoletes:	smtpdaemon
    Macro expanded in comment on line 414: %{_sysconfdir}/postfix/regexp_table
    Macro expanded in comment on line 419: %{_sysconfdir}/postfix/*.db
real 0.18
user 0.16
sys 0.01
warning: line 83: It's not recommended to have unversioned Obsoletes: Obsoletes:	smtpdaemon
warning: Macro expanded in comment on line 414: %{_sysconfdir}/postfix/regexp_table
warning: Macro expanded in comment on line 419: %{_sysconfdir}/postfix/*.db
Writing git revision for tag tld/postfix-3.8.6-1.1
error: Macro %_builddir has empty body
Begin-TLD-Builder-Info
Build-Time: user:2.79s sys:0.81s real:4.84s (faults io:8 non-io:497744)
Files queued for ftp:
   4903051 postfix-3.8.6-1.1.src.rpm
       187 postfix-3.8.6-1.1.src.rpm.uploadinfo
End-TLD-Builder-Info