You would need to build Kairos yourself but it's very small and simple.
Personally, I build it into a static library that I can include, but there's nothing stopping you from building the library code in with the project (add all of the files to the project build).
It doesn't use or require SFML but, if you use TimestepLite (which is a class that can be used without any dependancies; full version of Timestep requires other Kairos classes), you can use an SFML clock with it.
