Files to reproduce Ownership error when compiling appsignal

Dockerfile

FROM elixir:1.4.1

WORKDIR /app
ADD mix.exs mix.exs

RUN mix local.hex --force
RUN mix local.rebar --force

example_output.md

~/workspace/sandbox/elixir_mix 9:00:59
$ docker build -t test_appsignal .
Sending build context to Docker daemon 15.82 MB
Step 1 : FROM elixir:1.4.1
 ---> 6ab928376b6f
Step 2 : WORKDIR /app
 ---> Using cache
 ---> e6db12438fe2
Step 3 : ADD mix.exs mix.exs
 ---> Using cache
 ---> 6da346a8e286
Step 4 : RUN mix local.hex --force
 ---> Using cache
 ---> 216d9e275096
Step 5 : RUN mix local.rebar --force
 ---> Using cache
 ---> f7c5e8c73d4f
Successfully built f7c5e8c73d4f

~/workspace/sandbox/elixir_mix 9:01:12
$ docker run -it -v `pwd`:/app test_appsignal mix do deps.get, compile appsignal
Running dependency resolution...
All dependencies up to date

08:01:21.219 [info]  Downloading agent release from https://appsignal-agent-releases.global.ssl.fastly.net/557cdf6/appsignal-x86_64-linux-all-static.tar.gz
/bin/tar: ./appsignal-agent: Cannot change ownership to uid 501, gid 50: Operation not permitted
/bin/tar: ./appsignal.h: Cannot change ownership to uid 501, gid 50: Operation not permitted
/bin/tar: ./appsignal.version: Cannot change ownership to uid 501, gid 50: Operation not permitted
/bin/tar: ./libappsignal.a: Cannot change ownership to uid 501, gid 50: Operation not permitted
/bin/tar: .: Cannot change ownership to uid 501, gid 50: Operation not permitted
/bin/tar: Exiting with failure status due to previous errors
==> appsignal
could not compile dependency :appsignal, "mix compile" failed. You can recompile this dependency with "mix deps.compile appsignal", update it with "mix deps.update appsignal" or clean it with "mix deps.clean appsignal"
==> test
** (Mix) Extracting of /tmp/appsignal-agent-557cdf6.tar.gz failed!

mix.exs

  defmodule Test.Mixfile do
  use Mix.Project

  def project do
    [app: :test,
     version: "0.1.0",
     elixir: "~> 1.3",
     deps: deps()]
  end

  def application do
    []
  end

  defp deps do
    [
      {:appsignal, "~> 1.0"},
    ]
  end
end

run.sh

#!/bin/bash

docker build -t text_appsignal .
docker run -it -v `pwd`:/app test_appsignal mix do deps.get, compile appsignal