Analyse following RPM build log snippet. Describe contents accurately, without speculation or suggestions for resolution.            
Your analysis must be as concise as possible, while keeping relevant information intact.
Snippet: 
error: File not found: /builddir/build/BUILD/at-3.2.5-build/BUILDROOT/usr/bin/atrun
error: File not found: /builddir/build/BUILD/at-3.2.5-build/BUILDROOT/usr/bin/atd
This part of code shows the error which caused the build failure.