(defun builds (flag)
  (declare (optimize (speed 3) (safety 0) (space 3) (debug 0)))
  (macrolet ((make-lambda (flag)
               `(lambda ()
                  (declare (optimize (speed 3) (safety 0) (space 3) (debug 0)))
                  ,(when flag
                     '(print "smth"))
                  (+ 1 2))))
    (if flag
        (make-lambda t)
        (make-lambda nil))))