[...]

lder/rpm/SRPMS/tk-8.6.12-1.src.rpm
real 0.44
user 0.39
sys 0.04
Writing git revision for tag tld/tk-8.6.12-1
error: Macro %_builddir has empty body
Begin-TLD-Builder-Info
Build-Time: user:2.07s sys:1.35s real:4.75s (faults io:0 non-io:195436)
Files queued for ftp:
   4532631 tk-8.6.12-1.src.rpm
       181 tk-8.6.12-1.src.rpm.uploadinfo
End-TLD-Builder-Info