[...]

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.52112
+ umask 022
+ cd /home/users/builder/rpm/BUILD
+ rm -rf percona-server-5.7.23-23
Begin-TLD-Builder-Info
Build-Time: user:6.47s sys:0.82s real:14.85s (faults io:32 non-io:347629)
Files queued for ftp:
 145284093 mysql-5.7.23-23.3.src.rpm
       187 mysql-5.7.23-23.3.src.rpm.uploadinfo
End-TLD-Builder-Info