[...]

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-3.8.3.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-3.8.3-1.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 0.23
user 0.21
sys 0.02
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-3.8.3-1
error: Macro %_builddir has empty body
Begin-TLD-Builder-Info
Build-Time: user:1.80s sys:1.79s real:6.35s (faults io:15 non-io:493174)
Files queued for ftp:
   4879083 postfix-3.8.3-1.src.rpm
       185 postfix-3.8.3-1.src.rpm.uploadinfo
End-TLD-Builder-Info