Using __MODULE__ in nested modules

Works for me:

$ iex
Erlang/OTP 22 [erts-10.7] [source] [64-bit] [smp:4:4] [ds:4:4:10] [async-threads:1] [hipe]

Interactive Elixir (1.10.4) - press Ctrl+C to exit (type h() ENTER for help)
iex(1)> defmodule RootModule do 
...(1)>   defmodule SubModule do 
...(1)>     defstruct [:foo, :bar]
...(1)>     
...(1)>     @spec new() :: %__MODULE__{}
...(1)>     def new() do 
...(1)>       %__MODULE__{}
...(1)>     end 
...(1)>   end
...(1)> end
iex(2)> RootModule.SubModule.new
%RootModule.SubModule{bar: nil, foo: nil}

What versions of erlang and elixir are you using?