Why does Nim compiler allways depends on another's language compiler?

[Axl]

Also, woldn't the act of compiling to c as an intermediate step increase the 
compilation time? And wouldn't the compilation time be limited by the c 
compiler speed? I agree that compiling to c (or some other language) is an 
advantage, but as an option, not as a mandatory step. I don't think ALL 
programs would benefit from that intermediate representation, thats my point.