"Why do you want to compile it from source files? There is binary right next to them
http://dlcorp.nedopc.com/download/file.php?id=3013 You can run it just executing "unreal.exe"... or "wine unreal.exe" if you're not using windows..."
I prefer to be able to rebuild the project, so I can also debug it or modify for experiments... but even bigger issue is the "exe", I don't have windows, and my "wine" config is kinda flaky and broken, as I don't use it very often and can't remember what experiments I did with it, but I can't run windows executables easily... Anyway, it would highly likely take me at least half a day to make it work and to learn how to use it, probably whole day.