[...]

No conditional flags passed
from available:
--with   :	
--without:	 x
Available branches: AC-branch RA-branch master rpm3
Searching for tag auto/ti/mtr-0.92-1...
Searching for tag auto/ti/mtr-0_92-1...
--2018-03-12 22:53:52--  http://distfiles.pld-linux.org/distfiles/by-md5/f/7/f764793302a6cee2bf1573b95db6f295/v0.92.tar.gz
Resolving distfiles.pld-linux.org (distfiles.pld-linux.org)... 193.239.45.41
Connecting to distfiles.pld-linux.org (distfiles.pld-linux.org)|193.239.45.41|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 132826 (130K) [application/x-gzip]
Saving to: 'v0.92.tar.gz'
     0K .......... .......... .......... .......... .......... 38% 1.21M 0s
    50K .......... .......... .......... .......... .......... 77% 2.40M 0s
   100K .......... .......... .........                       100%  175M=0.06s
2018-03-12 22:53:52 (2.08 MB/s) - 'v0.92.tar.gz' saved [132826/132826]
Building target platforms: i686-linux
Wrote: /home/users/builder/rpm/SRPMS/mtr-0.92-1.src.rpm
exit status 0
Tagging with prefix: auto/ti/
Already on 'master'
No conditional flags passed
from available:
--with   :	
--without:	 x
Writing git revision for tag auto/ti/mtr-0.92-1
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.18596
+ umask 022
+ cd /home/users/builder/rpm/BUILD
+ rm -rf mtr-0.92
Begin-TLD-Builder-Info
Build-Time: user:0.63s sys:0.12s real:2.78s (faults io:0 non-io:143568)
Files queued for ftp:
    146546 mtr-0.92-1.src.rpm
       180 mtr-0.92-1.src.rpm.uploadinfo
End-TLD-Builder-Info