tzdata error when ecto.migrate contains repo insert

Error tzdata when running ecto.migrate that contains insertion command.

$ mix ecto.migrate
Compiling 9 files (.ex)

01:15:52.754 [info]  == Running WebApp.Repo.Migrations.InsertDefaultData.up/0 forward
** (ArgumentError) argument error
    (stdlib) :ets.lookup(:tzdata_current_release, :release_version)
    lib/tzdata/release_reader.ex:41: Tzdata.ReleaseReader.current_release_from_table/0
    lib/tzdata/release_reader.ex:13: Tzdata.ReleaseReader.simple_lookup/1
    lib/tzdata/release_reader.ex:7: Tzdata.ReleaseReader.zone_and_link_list/0
    lib/tzdata.ex:61: Tzdata.zone_exists?/1
    lib/timezone/timezone.ex:114: Timex.Timezone.name_of/1
    lib/timezone/timezone.ex:153: Timex.Timezone.do_get/3
    lib/timezone/timezone.ex:337: Timex.Timezone.convert/2
    lib/types/datetime.ex:132: Timex.Ecto.DateTime.dump/1
    (ecto) lib/ecto/type.ex:629: Ecto.Type.do_adapter_dump/3
    (ecto) lib/ecto/repo/schema.ex:619: Ecto.Repo.Schema.dump_field!/6
    (ecto) lib/ecto/repo/schema.ex:632: anonymous fn/6 in Ecto.Repo.Schema.dump_fields!/5
    (elixir) lib/enum.ex:1623: Enum."-reduce/3-lists^foldl/2-0-"/3
    (ecto) lib/ecto/repo/schema.ex:630: Ecto.Repo.Schema.dump_fields!/5
    (ecto) lib/ecto/repo/schema.ex:580: Ecto.Repo.Schema.dump_changes!/6
    (ecto) lib/ecto/repo/schema.ex:184: anonymous fn/11 in Ecto.Repo.Schema.do_insert/4
    (ecto) lib/ecto/repo/schema.ex:608: anonymous fn/3 in Ecto.Repo.Schema.wrap_in_transaction/6
    (db_connection) lib/db_connection.ex:1154: DBConnection.transaction_nested/2
    (db_connection) lib/db_connection.ex:1014: DBConnection.transaction_meter/3
    (db_connection) lib/db_connection.ex:667: DBConnection.transaction/3

Model

  schema "categories" do
    field :build_datetime, Timex.Ecto.DateTime
  end

Migration File

{:ok, _} = Repo.insert %Category{
      build_datetime: nil
    }

Temporary solution, add Application.ensure_all_started :timex before migration code. But it seems hacky....

bitwalker / timex_ecto

tzdata error when ecto.migrate contains repo insert #41