distillery failed upgrade after removing dependency https://github.com/bitwalker/distillery/issues/198

distillery-failed-upgrade.log

==> Loading configuration..
Distillery output_dir: rel/vira
==> Assembling release..
==> Building release vira:0.0.2 using environment prod
==> One or more direct or transitive dependencies are missing from
    :applications or :included_applications, they will not be included
    in the release:

    :ecto_enum
    :json_web_token

    This can cause your application to fail at runtime. If you are sure
    that this is not an issue, you may ignore this warning.

==> Discovered applications:
  inflex-1.8.0
    from: _build/dev/lib/inflex
    applications:
      :kernel
      :stdlib
      :elixir
    includes: none

  ja_serializer-0.11.2
    from: _build/dev/lib/ja_serializer
    applications:
      :kernel
      :stdlib
      :elixir
      :logger
      :inflex
      :plug
      :poison
    includes: none

  edeliver-1.4.0
    from: _build/dev/lib/edeliver
    applications:
      :kernel
      :stdlib
      :elixir
    includes: none

  connection-1.0.4
    from: _build/dev/lib/connection
    applications:
      :kernel
      :stdlib
      :elixir
    includes: none

  db_connection-1.1.0
    from: _build/dev/lib/db_connection
    applications:
      :kernel
      :stdlib
      :elixir
      :logger
      :connection
    includes: none

  mariaex-0.8.1
    from: _build/dev/lib/mariaex
    applications:
      :kernel
      :stdlib
      :elixir
      :logger
      :crypto
      :decimal
      :db_connection
    includes: none

  poolboy-1.5.1
    from: _build/dev/lib/poolboy
    applications:
      :kernel
      :stdlib
    includes: none

  decimal-1.3.1
    from: _build/dev/lib/decimal
    applications:
      :kernel
      :stdlib
      :elixir
    includes: none

  ecto-2.1.0
    from: _build/dev/lib/ecto
    applications:
      :kernel
      :stdlib
      :elixir
      :logger
      :decimal
      :poolboy
    includes: none

  phoenix_ecto-3.2.1
    from: _build/dev/lib/phoenix_ecto
    applications:
      :kernel
      :stdlib
      :elixir
      :logger
      :ecto
      :plug
    includes: none

  gettext-0.13.0
    from: _build/dev/lib/gettext
    applications:
      :kernel
      :stdlib
      :elixir
      :logger
    includes: none

  logger_file_backend-0.0.9
    from: _build/dev/lib/logger_file_backend
    applications:
      :kernel
      :stdlib
      :elixir
    includes: none

  cowlib-1.0.2
    from: _build/dev/lib/cowlib
    applications:
      :kernel
      :stdlib
      :crypto
    includes: none

  ssl-8.1
    from: /usr/local/Cellar/erlang/19.2/lib/erlang/lib/ssl-8.1
    applications:
      :crypto
      :public_key
      :kernel
      :stdlib
    includes: none

  ranch-1.3.2
    from: _build/dev/lib/ranch
    applications:
      :kernel
      :stdlib
      :ssl
    includes: none

  cowboy-1.0.4
    from: _build/dev/lib/cowboy
    applications:
      :kernel
      :stdlib
      :ranch
      :cowlib
      :crypto
    includes: none

  phoenix_html-2.9.1
    from: _build/dev/lib/phoenix_html
    applications:
      :kernel
      :stdlib
      :elixir
      :logger
      :plug
    includes: none

  phoenix_pubsub-1.0.1
    from: _build/dev/lib/phoenix_pubsub
    applications:
      :kernel
      :stdlib
      :elixir
      :logger
      :crypto
    includes: none

  eex-1.4.0
    from: /usr/local/Cellar/elixir/1.4.0/bin/../lib/eex
    applications:
      :kernel
      :stdlib
      :elixir
    includes: none

  poison-2.2.0
    from: _build/dev/lib/poison
    applications:
      :kernel
      :stdlib
      :elixir
    includes: none

  mime-1.0.1
    from: _build/dev/lib/mime
    applications:
      :kernel
      :stdlib
      :elixir
    includes: none

  plug-1.3.0
    from: _build/dev/lib/plug
    applications:
      :kernel
      :stdlib
      :elixir
      :crypto
      :logger
      :mime
    includes: none

  phoenix-1.2.1-dialyzer.1
    from: _build/dev/lib/phoenix
    applications:
      :kernel
      :stdlib
      :elixir
      :plug
      :poison
      :logger
      :eex
    includes: none

  base64url-0.0.1
    from: _build/dev/lib/base64url
    applications:
      :kernel
      :stdlib
    includes: none

  public_key-1.3
    from: /usr/local/Cellar/erlang/19.2/lib/erlang/lib/public_key-1.3
    applications:
      :asn1
      :crypto
      :kernel
      :stdlib
    includes: none

  asn1-4.0.4
    from: /usr/local/Cellar/erlang/19.2/lib/erlang/lib/asn1-4.0.4
    applications:
      :kernel
      :stdlib
    includes: none

  jose-1.8.1
    from: _build/dev/lib/jose
    applications:
      :kernel
      :stdlib
      :elixir
      :crypto
      :asn1
      :public_key
      :base64url
    includes: none

  crypto-3.7.2
    from: /usr/local/Cellar/erlang/19.2/lib/erlang/lib/crypto-3.7.2
    applications:
      :kernel
      :stdlib
    includes: none

  joken-1.4.1
    from: _build/dev/lib/joken
    applications:
      :kernel
      :stdlib
      :elixir
      :logger
      :crypto
      :jose
    includes: none

  logger-1.4.0
    from: /usr/local/Cellar/elixir/1.4.0/bin/../lib/logger
    applications:
      :kernel
      :stdlib
      :elixir
    includes: none

  cors_plug-1.1.4
    from: _build/dev/lib/cors_plug
    applications:
      :kernel
      :stdlib
      :elixir
      :logger
    includes: none

  compiler-7.0.3
    from: /usr/local/Cellar/erlang/19.2/lib/erlang/lib/compiler-7.0.3
    applications:
      :kernel
      :stdlib
    includes: none

  elixir-1.4.0
    from: /usr/local/Cellar/elixir/1.4.0/bin/../lib/elixir
    applications:
      :kernel
      :stdlib
      :compiler
    includes: none

  stdlib-3.2
    from: /usr/local/Cellar/erlang/19.2/lib/erlang/lib/stdlib-3.2
    applications:
      :kernel
    includes: none

  kernel-5.1.1
    from: /usr/local/Cellar/erlang/19.2/lib/erlang/lib/kernel-5.1.1
    applications: none
    includes: none

  vira-0.0.2
    from: _build/dev/lib/vira
    applications:
      :kernel
      :stdlib
      :elixir
      :cors_plug
      :joken
      :phoenix
      :phoenix_pubsub
      :phoenix_html
      :cowboy
      :logger
      :logger_file_backend
      :gettext
      :phoenix_ecto
      :mariaex
      :edeliver
      :ja_serializer
    includes: none

  iex-1.4.0
    from: /usr/local/Cellar/elixir/1.4.0/bin/../lib/iex
    applications:
      :kernel
      :stdlib
      :elixir
    includes: none

  sasl-3.0.2
    from: /usr/local/Cellar/erlang/19.2/lib/erlang/lib/sasl-3.0.2
    applications:
      :kernel
      :stdlib
    includes: none

==> Generated overlay vars:
    release_name=:vira
    release_version="0.0.2"
    is_upgrade=true
    upgrade_from="0.0.1"
    dev_mode=false
    include_erts=true
    include_src=false
    include_system_libs=true
    erl_opts=""
    erts_vsn="8.2"
    output_dir="rel/vira"
==> Copying applications to rel/vira
==> Generating nodetool
==> Generating start_erl.data
==> Generating vm.args
==> Generating sys.config from config/config.exs
==> Including ERTS 8.2 from /usr/local/Cellar/erlang/19.2/lib/erlang/erts-8.2
==> Generating boot script
==> Generating RELEASES
==> Generating start_clean.boot
==> Generating relup for vira
==> joken requires an appup, but it wasn't provided, one will be generated for you..
==> Generated .appup for joken 1.3.2 -> 1.4.1
==> jose requires an appup, but it wasn't provided, one will be generated for you..
==> Generated .appup for jose 1.8.0 -> 1.8.1
==> ranch requires an appup, but it wasn't provided, one will be generated for you..
==> Generated .appup for ranch 1.2.1 -> 1.3.2
==> vira requires an appup, but it wasn't provided, one will be generated for you..
==> Generated .appup for vira 0.0.1 -> 0.0.2
==> Failed to build release:

    confex: File not found: "confex.app"