defmodule Q do
  stems = 
    File.read!("stems")
    |> String.split("\n", trim: true)
    |> Enum.reduce(%{}, fn x, map -> 
      d = Code.eval_string(x) |> elem(0)
      Map.put(map, elem(d, 0), elem(d, 1))
    end)
  def stems_data(), do: unquote(Macro.escape(stems))
end

stems file example

{"3-d", ["3-d reconstruction"]}
{"abiot", ["abiotic"]}
{"abnorm", ["chromosome abnormality"]}
{"acetyl", ["acetylation", "acetyltransferases"]}
{"acetyltransferas", ["acetyltransferases"]}

It seems that Code.eval_string does not work in compile-time.
with

** (CompileError) nofile:1: undefined function .../0
    (stdlib) lists.erl:1354: :lists.mapfoldl/3
    (stdlib) lists.erl:1355: :lists.mapfoldl/3

why?
Is there a way to replace that line with other code?

remark: I am using elixir 1.5.1, OTP 20.0