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: 
RPM build errors:
    Installed (but unpackaged) file(s) found:
   /usr/share/doc/bootc/baseimage/base/ostree
   /usr/share/doc/bootc/baseimage/base/usr/lib/ostree/prepare-root.conf
   /usr/share/doc/bootc/baseimage/dracut/usr/lib/dracut.conf.d/10-bootc-base.conf
   /usr/share/doc/bootc/baseimage/systemd/usr/lib/kernel/install.conf
Child return code was: 1
These are the files that are presented in buildroot, but not used in %files section.