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: Bad exit status from /var/tmp/rpm-tmp.lrffbY (%build)
    Bad exit status from /var/tmp/rpm-tmp.lrffbY (%build)
The build failed during the %build phase.