diff --git a/mix.exs b/mix.exs
index 01338ba..c1c0a34 100644
--- a/mix.exs
+++ b/mix.exs
@@ -82,11 +82,12 @@ defmodule Mix.Tasks.Compile.Asn1 do
 
     Erlang.compile(manifest(), mappings, :asn1, :erl, force, fn
       input, output ->
+        File.mkdir(Path.dirname(output))
         options = options ++ [:noobj, outdir: Erlang.to_erl_file(Path.dirname(output))]
 
         case :asn1ct.compile(Erlang.to_erl_file(input), options) do
-          :ok -> :ok
-          error -> error
+          :ok -> {:ok, [], []}
+          :error -> {:error, [], []}
         end
     end)
   end