[...]

Building for target x86_64-linux
Wrote: /home/users/builder/rpm/SRPMS/bluez-5.75-1.src.rpm
RPM build warnings:
    Macro expanded in comment on line 81: %{_lib} (see cups.spec)
real 0.10
user 0.09
sys 0.01
exit status 0
Writing package revision
builder: SMP make flags are set to -j2
Already up to date.
warning: Macro expanded in comment on line 81: %{_lib} (see cups.spec)
No conditional flags passed
from available:
--with   :	
--without:	 deprecated static_libs systemd
Available branches: bluez-4 master
bluez-5.75.tar.xz having proper md5sum already exists
./builder[2768]: ulimit: unlimited exceeds allowable coredump(blocks) limit
Updating .distbcond
warning: Macro expanded in comment on line 81: %{_lib} (see cups.spec)
Building target platforms: x86_64-linux
Building for target x86_64-linux
Wrote: /home/users/builder/rpm/SRPMS/bluez-5.75-1.src.rpm
RPM build warnings:
    Macro expanded in comment on line 81: %{_lib} (see cups.spec)
real 0.10
user 0.09
sys 0.00
warning: Macro expanded in comment on line 81: %{_lib} (see cups.spec)
Writing git revision for tag tld/bluez-5.75-1
error: Macro %_builddir has empty body
Begin-TLD-Builder-Info
Build-Time: user:1.59s sys:0.48s real:4.28s (faults io:5 non-io:295473)
Files queued for ftp:
   2432359 bluez-5.75-1.src.rpm
       182 bluez-5.75-1.src.rpm.uploadinfo
End-TLD-Builder-Info