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: 

No matching package to install: 'libselinux-devel >= 3.6-1'
No matching package to install: 'libsepol-devel >= 3.6-1'
Not all dependencies satisfied
Error: Some packages could not be foun
These are missing dependencies. The package with this version can't be built without them.