title: Can make "target" take an argument?
body: <p>lets say I am doing mk "target" to build something. Is it possible to pass an argument to it?
  i.e. mk "target" "x" and it will do things accordingly? I know that I will be providing mk "target" an argument and I know its semantics, just dont know the name well in advance. </p>
  
  <p>Possible?</p>