[...]

Building for target i686-linux
Wrote: /home/users/builder/rpm/SRPMS/postfix-3.8.3-1.src.rpm
real 0.19
user 0.18
sys 0.01
exit status 0
Writing package revision
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: exceeds allowable 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: i686-linux
Building for target i686-linux
Wrote: /home/users/builder/rpm/SRPMS/postfix-3.8.3-1.src.rpm
real 0.19
user 0.18
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-3.8.3-1
error: Macro %_builddir has empty body
Begin-TLD-Builder-Info
Build-Time: user:1.46s sys:0.76s real:3.36s (faults io:26 non-io:359738)
Files queued for ftp:
   4878975 postfix-3.8.3-1.src.rpm
       185 postfix-3.8.3-1.src.rpm.uploadinfo
End-TLD-Builder-Info