[...]

No conditional flags passed
from available:
--with   :	
--without:	 tests
Available branches: AC-branch master
Searching for tag auto/ti/perl-JSON-2.90-1...
Searching for tag auto/ti/perl-JSON-2_90-1...
--2017-04-13 07:28:43--  http://distfiles.pld-linux.org/distfiles/by-md5/e/1/e1512169a623e790a3f69b599cc1d3b9/JSON-2.90.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: 85333 (83K) [application/x-gzip]
Saving to: 'JSON-2.90.tar.gz'
     0K .......... .......... .......... .......... .......... 60% 1.05M 0s
    50K .......... .......... .......... ...                  100% 61.3M=0.05s
2017-04-13 07:28:43 (1.73 MB/s) - 'JSON-2.90.tar.gz' saved [85333/85333]
Building target platforms: i686-linux
Wrote: /home/users/builder/rpm/SRPMS/perl-JSON-2.90-1.src.rpm
exit status 0
Tagging with prefix: auto/ti/
HEAD is now at a0cafd6... - up to 2.90
fatal: HEAD does not point to a branch
No conditional flags passed
from available:
--with   :	
--without:	 tests
Writing git revision for tag auto/ti/perl-JSON-2.90-1
On detached HEAD. Use -r BRANCHNAME to override
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.99849
+ umask 022
+ cd /home/users/builder/rpm/BUILD
+ rm -rf JSON-2.90
Begin-TLD-Builder-Info
Build-Time: user:0.81s sys:0.24s real:2.03s (faults io:0 non-io:81356)
Files queued for ftp:
     90057 perl-JSON-2.90-1.src.rpm
       186 perl-JSON-2.90-1.src.rpm.uploadinfo
End-TLD-Builder-Info