[...]

builder: SMP make flags are set to -j2
Cloning into 'libesmtp'...
8bd1f4c8c7e449b4a0853564b9360e5e99d4b18c
Already on 'master'
Already up-to-date.
Available branches: AC-branch RA-branch master
Searching for tag auto/ti/libesmtp-1.0.6-1...
Searching for tag auto/ti/libesmtp-1_0_6-1...
--2014-07-30 06:04:30--  http://distfiles.pld-linux.org/distfiles/by-md5/b/f/bf3915e627fd8f35524a8fdfeed979c8/libesmtp-1.0.6.tar.bz2
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: 365506 (357K) [application/x-bzip2]
Saving to: 'libesmtp-1.0.6.tar.bz2'
     0K .......... .......... .......... .......... .......... 14%  155K 2s
    50K .......... .......... .......... .......... .......... 28%  130K 2s
   100K .......... .......... .......... .......... .......... 42%  120K 2s
   150K .......... .......... .......... .......... .......... 56%  129K 1s
   200K .......... .......... .......... .......... .......... 70%  174K 1s
   250K .......... .......... .......... .......... .......... 84%  155K 0s
   300K .......... .......... .......... .......... .......... 98%  130K 0s
   350K ......                                                100%  219K=2.5s
2014-07-30 06:04:33 (141 KB/s) - 'libesmtp-1.0.6.tar.bz2' saved [365506/365506]
Building target platforms: i686-linux
Wrote: /home/users/builder/rpm/SRPMS/libesmtp-1.0.6-1.src.rpm
exit status 0
Tagging with prefix: auto/ti/
Version: 1.0.6
Release: 1
tag: auto/ti/libesmtp-1.0.6-1
Searching for tag auto/ti/libesmtp-1.0.6-1...
To ssh://git@git.pld-linux.org/packages/libesmtp
 * [new tag]         auto/ti/libesmtp-1.0.6-1 -> auto/ti/libesmtp-1.0.6-1
error: Macro %_builddir has empty body
error: Macro %_builddir has empty body
Executing(--clean):  env -i TMP=/home/users/builder/tmp PATH=/bin:/usr/bin:/usr/sbin:/sbin:/usr/X11R6/bin HOME=/home/users/builder TMPDIR=/home/users/builder/tmp  /bin/sh -e /home/users/builder/tmp/rpm-tmp.90366
+ umask 022
+ cd /home/users/builder/rpm/BUILD
+ rm -rf libesmtp-1.0.6
Begin-PLD-Builder-Info
Build-Time: user:2.45s sys:1.35s real:9.84s (faults io:0 non-io:170353)
Files queued for ftp:
    371353 libesmtp-1.0.6-1.src.rpm
       186 libesmtp-1.0.6-1.src.rpm.uploadinfo
End-PLD-Builder-Info