Module ‘System.Cmd’ is deprecated

--b.hs 
import System.Cmd 
main = rawSystem "ls" ["-lh"] 

$ runghc b.hs
b.hs:1:1: Warning:
     Module ‘System.Cmd’ is deprecated: Use "System.Process" instead

---

import  System.Process 
main = createProcess (proc"ls" ["-lh"])