message: docker.ADD: Do not force the name of the target.
diff: @@ -161,7 +161,7 @@ class DockerFile(drake.Node):
  chain(*(parents(n.path().without_prefix(root))
  for n in installed_files(nodes)
  if n is not drake.Path.dot))):
  - print('ADD %s %s/%s' % (add, p, add), file = f)
  + print('ADD %s %s' % (add, p), file = f)
  for p in self.__dockerfile.ports_:
  print('EXPOSE %s' % p, file = f)
  if self.__dockerfile.volumes_:
  