[...]

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   heartbeat.spec 2>&1
builder: SMP make flags are set to -j2
Cloning into 'heartbeat'...
27bf4720c51bfccc0245fdc1976427b2508240d1
Already on 'master'
Your branch is up to date with 'origin/master'.
Already up to date.
Available branches: master
Searching for tag auto/ti/heartbeat-3.0.6-2...
Searching for tag auto/ti/heartbeat-3_0_6-2...
--2019-07-27 10:25:21--  http://df.tld-linux.org/by-md5/8/a/8a5e1fc2b44750c052d1007226a84dbe/STABLE-3.0.6.tar.bz2
Resolving df.tld-linux.org (df.tld-linux.org)... 95.216.105.199
Connecting to df.tld-linux.org (df.tld-linux.org)|95.216.105.199|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 532796 (520K) [application/x-bzip2]
Saving to: 'STABLE-3.0.6.tar.bz2'
     0K .......... .......... .......... .......... ..........  9%  337M 0s
    50K .......... .......... .......... .......... .......... 19%  434M 0s
   100K .......... .......... .......... .......... .......... 28% 3.43M 0s
   150K .......... .......... .......... .......... .......... 38%  226M 0s
   200K .......... .......... .......... .......... .......... 48%  353M 0s
   250K .......... .......... .......... .......... .......... 57%  149M 0s
   300K .......... .......... .......... .......... .......... 67%  279M 0s
   350K .......... .......... .......... .......... .......... 76%  371M 0s
   400K .......... .......... .......... .......... .......... 86%  388M 0s
   450K .......... .......... .......... .......... .......... 96%  418M 0s
   500K .......... ..........                                 100%  337M=0.02s
2019-07-27 10:25:21 (32.2 MB/s) - 'STABLE-3.0.6.tar.bz2' saved [532796/532796]
warning: Could not canonicalize hostname: giant
Building target platforms: i686-linux
Wrote: /home/users/builder/rpm/SRPMS/heartbeat-3.0.6-2.src.rpm
exit status 0
Tagging with prefix: auto/ti/
Already on 'master'
Writing git revision for tag auto/ti/heartbeat-3.0.6-2
Tag auto/ti/heartbeat-3.0.6-2 already exists
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.74162
+ umask 022
+ cd /home/users/builder/rpm/BUILD
+ rm -rf Heartbeat-3-0-STABLE-3.0.6
Begin-TLD-Builder-Info
Build-Time: user:0.77s sys:0.14s real:1.77s (faults io:0 non-io:126083)
End-TLD-Builder-Info