[...]

building SRPM using: cd rpm/packages; nice -n 0 ./builder -nu -nm --nodeps --http --define '_tld_builder 1' -bs  -r HEAD  -Tp auto/ti/ -tt   xfce4-dev-tools.spec 2>&1
builder: SMP make flags are set to -j2
Cloning into 'xfce4-dev-tools'...
From git://git.pld-linux.org/packages/xfce4-dev-tools
 * [new ref]         refs/notes/commits -> refs/notes/commits
e21588cffce61996f437f86ca93bbfbc0f474c15
Already on 'master'
Your branch is up to date with 'origin/master'.
Already up to date.
Available branches: AC-branch master
Searching for tag auto/ti/xfce4-dev-tools-4.14.0-1...
Searching for tag auto/ti/xfce4-dev-tools-4_14_0-1...
--2019-08-28 18:06:44--  http://distfiles.pld-linux.org/by-md5/5/f/5f8fc8af73819c08d9e4c26a3ac457e7/xfce4-dev-tools-4.14.0.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: 292275 (285K) [application/x-bzip2]
Saving to: 'xfce4-dev-tools-4.14.0.tar.bz2'
     0K .......... .......... .......... .......... .......... 17%  610K 0s
    50K .......... .......... .......... .......... .......... 35% 1.19M 0s
   100K .......... .......... .......... .......... .......... 52% 73.0M 0s
   150K .......... .......... .......... .......... .......... 70% 54.8M 0s
   200K .......... .......... .......... .......... .......... 87% 1.23M 0s
   250K .......... .......... .......... .....                100%  346M=0.2s
2019-08-28 18:06:44 (1.70 MB/s) - 'xfce4-dev-tools-4.14.0.tar.bz2' saved [292275/292275]
warning: Could not canonicalize hostname: giant
Building target platforms: i686-linux
Wrote: /home/users/builder/rpm/SRPMS/xfce4-dev-tools-4.14.0-1.src.rpm
exit status 0
Tagging with prefix: auto/ti/
Already on 'master'
Writing git revision for tag auto/ti/xfce4-dev-tools-4.14.0-1
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.43010
+ umask 022
+ cd /home/users/builder/rpm/BUILD
+ rm -rf xfce4-dev-tools-4.14.0
Begin-TLD-Builder-Info
Build-Time: user:0.89s sys:0.11s real:3.24s (faults io:0 non-io:99126)
Files queued for ftp:
    297555 xfce4-dev-tools-4.14.0-1.src.rpm
       194 xfce4-dev-tools-4.14.0-1.src.rpm.uploadinfo
End-TLD-Builder-Info