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: 
DEBUG util.py:459:  error: Bad source: /chroot_tmpdir/srpm_unpacked/SOURCES/libsndfile-1.2.3.tar.xz: No such file or directory

rpmbuild complains about missing source file