[...]

warning: line 30: It's not recommended to have unversioned Obsoletes: Obsoletes:	tnftp
Building target platforms: x86_64-linux
Building for target x86_64-linux
Wrote: /home/users/builder/rpm/SRPMS/ftp-0.17-31.src.rpm
RPM build warnings:
    line 28: It's not recommended to have unversioned Obsoletes: Obsoletes:	inetutils-ftp
    line 29: It's not recommended to have unversioned Obsoletes: Obsoletes:	lukemftp
    line 30: It's not recommended to have unversioned Obsoletes: Obsoletes:	tnftp
real 0.02
user 0.02
sys 0.00
exit status 0
Writing package revision
builder: SMP make flags are set to -j2
Already up to date.
warning: line 28: It's not recommended to have unversioned Obsoletes: Obsoletes:	inetutils-ftp
warning: line 29: It's not recommended to have unversioned Obsoletes: Obsoletes:	lukemftp
warning: line 30: It's not recommended to have unversioned Obsoletes: Obsoletes:	tnftp
Available branches: AC-branch RA-branch master
netkit-ftp-0.17.tar.gz having proper md5sum already exists
ftp-non-english-man-pages.tar.bz2 having proper md5sum already exists
./builder[2756]: ulimit: unlimited exceeds allowable coredump(blocks) limit
warning: line 28: It's not recommended to have unversioned Obsoletes: Obsoletes:	inetutils-ftp
warning: line 29: It's not recommended to have unversioned Obsoletes: Obsoletes:	lukemftp
warning: line 30: It's not recommended to have unversioned Obsoletes: Obsoletes:	tnftp
Building target platforms: x86_64-linux
Building for target x86_64-linux
Wrote: /home/users/builder/rpm/SRPMS/ftp-0.17-31.src.rpm
RPM build warnings:
    line 28: It's not recommended to have unversioned Obsoletes: Obsoletes:	inetutils-ftp
    line 29: It's not recommended to have unversioned Obsoletes: Obsoletes:	lukemftp
    line 30: It's not recommended to have unversioned Obsoletes: Obsoletes:	tnftp
real 0.02
user 0.02
sys 0.00
warning: line 28: It's not recommended to have unversioned Obsoletes: Obsoletes:	inetutils-ftp
warning: line 29: It's not recommended to have unversioned Obsoletes: Obsoletes:	lukemftp
warning: line 30: It's not recommended to have unversioned Obsoletes: Obsoletes:	tnftp
Writing git revision for tag tld/ftp-0.17-31
error: Macro %_builddir has empty body
Begin-TLD-Builder-Info
Build-Time: user:0.86s sys:0.55s real:3.32s (faults io:3 non-io:330712)
Files queued for ftp:
    109961 ftp-0.17-31.src.rpm
       181 ftp-0.17-31.src.rpm.uploadinfo
End-TLD-Builder-Info