[...]

from available:
--with   :	
--without:	 opt
Available branches: AC-branch master ocaml-3
Searching for tag auto/ti/ocaml-findlib-1.5.5-8...
Searching for tag auto/ti/ocaml-findlib-1_5_5-8...
--2015-07-08 14:37:44--  http://distfiles.pld-linux.org/distfiles/by-md5/7/0/703eae112f9e912507c3a2f8d8c48498/findlib-1.5.5.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: 240247 (235K) [application/x-gzip]
Saving to: 'findlib-1.5.5.tar.gz'
     0K .......... .......... .......... .......... .......... 21%  817K 0s
    50K .......... .......... .......... .......... .......... 42% 1.54M 0s
   100K .......... .......... .......... .......... .......... 63% 1.58M 0s
   150K .......... .......... .......... .......... .......... 85% 1.66M 0s
   200K .......... .......... .......... ....                 100% 12.3M=0.2s
2015-07-08 14:37:44 (1.47 MB/s) - 'findlib-1.5.5.tar.gz' saved [240247/240247]
warning: Could not canonicalize hostname: giant
Building target platforms: i686-linux
Wrote: /home/users/builder/rpm/SRPMS/ocaml-findlib-1.5.5-8.src.rpm
exit status 0
Tagging with prefix: auto/ti/
Already on 'master'
No conditional flags passed
from available:
--with   :	
--without:	 opt
Writing git revision for tag auto/ti/ocaml-findlib-1.5.5-8
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.12448
+ umask 022
+ cd /home/users/builder/rpm/BUILD
+ rm -rf findlib-1.5.5
Begin-PLD-Builder-Info
Build-Time: user:3.00s sys:1.38s real:5.59s (faults io:12 non-io:210837)
Files queued for ftp:
    247697 ocaml-findlib-1.5.5-8.src.rpm
       191 ocaml-findlib-1.5.5-8.src.rpm.uploadinfo
End-PLD-Builder-Info