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: 
/usr/bin/rspec:25: warning: syslog is not part of the default gems starting from Ruby 3.4.0. Install syslog from RubyGems.
Warning coming from Ruby 3.4, suggesting at possible problems