➜  magic git:(master) mix deps.get

19:29:12.008 [error] Task #PID<0.189.0> started from :hex_fetcher terminating
** (FunctionClauseError) no function clause matching in String.to_charlist/1
    (elixir) lib/string.ex:2029: String.to_charlist(nil)
    (hex) lib/hex/http/ssl.ex:56: Hex.HTTP.SSL.ssl_opts/1
    (hex) lib/hex/http.ex:34: Hex.HTTP.build_http_opts/2
    (hex) lib/hex/http.ex:9: Hex.HTTP.request/5
    (hex) lib/hex/registry/server.ex:320: anonymous fn/3 in Hex.Registry.Server.prefetch_online/2
    (elixir) lib/task/supervised.ex:88: Task.Supervised.do_apply/2
    (elixir) lib/task/supervised.ex:38: Task.Supervised.reply/5
    (stdlib) proc_lib.erl:247: :proc_lib.init_p_do_apply/3
Function: #Function<16.115348921/0 in Hex.Registry.Server.prefetch_online/2>
    Args: []
** (exit) exited in: GenServer.call(Hex.Registry.Server, {:versions, "hexpm", "poolboy"}, 60000)
    ** (EXIT) time out
    (elixir) lib/gen_server.ex:834: GenServer.call/3
    (hex) lib/hex/registry/server.ex:56: Hex.Registry.Server.versions/2
    (hex) lib/hex/remote_converger.ex:419: Hex.RemoteConverger.verify_dep/3
    (elixir) lib/enum.ex:743: anonymous fn/3 in Enum.each/2
    (stdlib) lists.erl:1263: :lists.foldl/3
    (elixir) lib/enum.ex:1915: Enum.each/2
    (hex) lib/hex/remote_converger.ex:40: Hex.RemoteConverger.converge/2
    (mix) lib/mix/dep/converger.ex:95: Mix.Dep.Converger.all/4

Elixir version is

Erlang/OTP 20 [erts-9.3] [source] [64-bit] [smp:8:8] [ds:8:8:10] [async-threads:10] [hipe] [kernel-poll:false] [dtrace]

Elixir 1.6.4 (compiled with OTP 20)

Hex version is

Hex v0.18.1

And this is what I have down in iTerm2 use history

10181  gst
10182  docker build -t registry-hlj.helijia.com/gitlab_lego_elixir --build-arg mix_env=dev --build-arg branch=to-sky! .
10183  gst
10184  gd
10185  gst
10186  gco .
10187  gst
10188  docker build -t registry-hlj.helijia.com/gitlab_lego_elixir --build-arg mix_env=dev --build-arg branch=to-sky! .
10189  tig
10190  registry-hlj.helijia.com/gitlab_lego_elixir
10191  ssh registry-hlj.helijia.com
10192  docker build -t registry-hlj.helijia.com/gitlab_lego_elixir --build-arg mix_env=dev --build-arg branch=to-sky! .
10193  mix hex.organization key acme
10194  mix hex.organization key helijia
10195  mix hex.organization list
10196  mix hex.organization key helijia list
10197  mix hex.organization key helijia generate
10198  docker build -t registry-hlj.helijia.com/gitlab_lego_elixir --build-arg mix_env=dev --build-arg branch=to-sky! .
10199  mix deps.get

I don’t know what going on… and have no idea how and why it happen?
Someone know it?
Thanks.