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: Empty %files file /builddir/build/BUILD/uxn-1.0-build/uxn-1.0/debugsourcefiles.list
    Empty %files file /builddir/build/BUILD/uxn-1.0-build/uxn-1.0/debugsourcefiles.list
Error indicating empty %files for the debug package