ok    unbound program is unaffected
  ok    a construct declared AFTER the build applies
  ok    a construct declared after the build can REFUSE
  ok    an unlinked target is skipped, not fatal
  ok    a binding for a different fn does not fire
  ok    two constructs compose on one crossing
  ok    an EXIT construct declared after the build replaces the result

  7 assertions, 7 passed, 0 failed