#+name: input
tramp

* Works

#+begin_src sh :stdin input
  read -r who
  echo "hello $who"
#+end_src

#+begin_src sh :dir /ssh:user@host:
  who=tramp
  echo "hello $who"
#+end_src

* Fails

#+begin_src sh :dir /ssh:user@host: :stdin input
  read -r who
  echo "hello $who"
#+end_src