[...]

Already up-to-date.
No conditional flags passed
from available:
--with   :	
--without:	 x
Available branches: AC-branch RA-branch master rpm3
Searching for tag auto/ti/mtr-0.87-1...
Searching for tag auto/ti/mtr-0_87-1...
--2017-07-04 19:27:12--  http://distfiles.pld-linux.org/distfiles/by-md5/2/3/23fa76f57fa67fbc95ecf4fb5901ff50/v0.87.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: 86788 (85K) [application/x-gzip]
Saving to: 'v0.87.tar.gz'
     0K .......... .......... .......... .......... .......... 58% 1.02M 0s
    50K .......... .......... .......... ....                 100% 52.1M=0.05s
2017-07-04 19:27:12 (1.70 MB/s) - 'v0.87.tar.gz' saved [86788/86788]
Building target platforms: i686-linux
Wrote: /home/users/builder/rpm/SRPMS/mtr-0.87-1.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-0.87-1
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.35956
+ umask 022
+ cd /home/users/builder/rpm/BUILD
+ rm -rf mtr-0.87
Begin-TLD-Builder-Info
Build-Time: user:0.72s sys:0.21s real:2.59s (faults io:0 non-io:159061)
Files queued for ftp:
    101865 mtr-0.87-1.src.rpm
       180 mtr-0.87-1.src.rpm.uploadinfo
End-TLD-Builder-Info