[...]

No conditional flags passed
from available:
--with   :	
--without:	 static_libs
Available branches: AC-branch RA-branch master
Searching for tag auto/ti/libebml-1.3.10-1...
Searching for tag auto/ti/libebml-1_3_10-1...
--2020-04-05 17:11:00--  http://distfiles.pld-linux.org/by-md5/7/1/71edd78f05a7136c9bbed89f010bbef0/libebml-1.3.10.tar.xz
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: 69488 (68K) [application/octet-stream]
Saving to: 'libebml-1.3.10.tar.xz'
     0K .......... .......... .......... .......... .......... 73%  929K 0s
    50K .......... .......                                    100% 79.8M=0.05s
2020-04-05 17:11:00 (1.23 MB/s) - 'libebml-1.3.10.tar.xz' saved [69488/69488]
warning: Could not canonicalize hostname: giant
Building target platforms: i686-linux
Wrote: /home/users/builder/rpm/SRPMS/libebml-1.3.10-1.src.rpm
exit status 0
Tagging with prefix: auto/ti/
Already on 'master'
No conditional flags passed
from available:
--with   :	
--without:	 static_libs
Writing git revision for tag auto/ti/libebml-1.3.10-1
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.19363
+ umask 022
+ cd /home/users/builder/rpm/BUILD
+ rm -rf libebml-1.3.10
Begin-TLD-Builder-Info
Build-Time: user:1.54s sys:1.20s real:7.17s (faults io:0 non-io:92453)
Files queued for ftp:
     74896 libebml-1.3.10-1.src.rpm
       186 libebml-1.3.10-1.src.rpm.uploadinfo
End-TLD-Builder-Info