[...]

unlimited exceeds allowable coredump(blocks) limit
Building target platforms: x86_64-linux
Building for target x86_64-linux
Wrote: /home/users/builder/rpm/SRPMS/nginx-1.25.4-1.src.rpm
real 0.29
user 0.24
sys 0.05
Writing git revision for tag tld/nginx-1.25.4-1
error: Macro %_builddir has empty body
Begin-TLD-Builder-Info
Build-Time: user:3.73s sys:1.26s real:7.20s (faults io:3 non-io:630815)
Files queued for ftp:
   2049921 nginx-1.25.4-1.src.rpm
       184 nginx-1.25.4-1.src.rpm.uploadinfo
End-TLD-Builder-Info