anchor.diff:  /F             Remove installation directory if it already exists.
   /R             Load registry information to register '.rockspec'
                  extension with LuaRocks commands (right-click).
  +/NOADMIN       The installer requires admin priviledges. If not
  +               available it will elevate a new process. Use this
  +               switch to prevent elevation, but make sure the
  +               destination paths are all accessible for the current
  +               user.
   
   ]])
   end
  
positive.code: local function mkdir (dir)
  	return exec([[.\bin\bin\mkdir -p "]]..dir..[[" >NUL]])
  end
  
  -- interpolate string with values from 'vars' table
  local function S (tmpl)
  
negative.code: 			FORCE = true
  		elseif name == "/R" then
  			REGISTRY = true
  		elseif name == "/NOADMIN" then
  			NOADMIN = true
  		else
  			die("Unrecognized option: " .. name)
  		end
  