[...]

building SRPM using: cd rpm/packages; nice -n 0 ./builder -nu -nm --nodeps --http --define '_tld_builder 1' -bs  -r HEAD   tcp_wrappers.spec 2>&1
builder: SMP make flags are set to -j2
Cloning into 'tcp_wrappers'...
From git://git.pld-linux.org/packages/tcp_wrappers
 * [new ref]         refs/notes/commits -> refs/notes/commits
Already up to date.
Available branches: AC-branch RA-branch master
--2021-05-09 22:38:17--  http://distfiles.pld-linux.org/by-md5/e/6/e6fa25f71226d090f34de3f6b122fb5a/tcp_wrappers_7.6.tar.gz
Resolving distfiles.pld-linux.org... 193.239.45.41
Connecting to distfiles.pld-linux.org|193.239.45.41|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 99438 (97K) [application/x-gzip]
Saving to: 'tcp_wrappers_7.6.tar.gz'
     0K .......... .......... .......... .......... .......... 51%  810K 0s
    50K .......... .......... .......... .......... .......   100% 85.0M=0.06s
2021-05-09 22:38:17 (1.52 MB/s) - 'tcp_wrappers_7.6.tar.gz' saved [99438/99438]
./builder[2756]: ulimit: exceeds allowable limit
Building target platforms: i686-linux
Building for target i686-linux
Wrote: /home/users/builder/rpm/SRPMS/tcp_wrappers-7.6-47.src.rpm
real 0.06
user 0.04
sys 0.01
exit status 0
Writing package revision
builder: SMP make flags are set to -j2
Already up to date.
Available branches: AC-branch RA-branch master
tcp_wrappers_7.6.tar.gz having proper md5sum already exists
./builder[2756]: ulimit: exceeds allowable limit
Building target platforms: i686-linux
Building for target i686-linux
Wrote: /home/users/builder/rpm/SRPMS/tcp_wrappers-7.6-47.src.rpm
real 0.06
user 0.04
sys 0.01
Writing git revision for tag tld/tcp_wrappers-7.6-47
error: Macro %_builddir has empty body
Begin-TLD-Builder-Info
Build-Time: user:2.19s sys:2.31s real:4.05s (faults io:0 non-io:415994)
Files queued for ftp:
    140120 tcp_wrappers-7.6-47.src.rpm
       189 tcp_wrappers-7.6-47.src.rpm.uploadinfo
End-TLD-Builder-Info