我正在阅读 Dave Thomas 的“Programming Elixir”。我现在正要创建你的第一个混音项目。HTTPoison 刚刚被引入并添加到 mix.exs 中的应用程序功能中。现在应该第一次使用iex -S mix. 那时我遇到了问题ssl_verify_hostname。安装后erlang-src，erlang-dev我现在陷入以下控制台输出
$ iex -S mix
Erlang/OTP 18 [erts-7.1] [source] [64-bit] [smp:8:8] [async-threads:10] [kernel-poll:false]
WARN: Expected /home/..../issues/deps/idna to be an app dir (containing ebin/*.app), but no .app found.
WARN: Expected /home/..../issues/deps/ssl_verify_hostname to be an app dir (containing ebin/*.app), but no .app found.
==> hackney (compile)
WARN: Expected /home/..../issues/deps/idna to be an app dir (containing ebin/*.app), but no .app found.
WARN: Expected /home/..../issues/deps/ssl_verify_hostname to be an app dir (containing ebin/*.app), but no .app found.
Dependency not available: idna-.* ({git,
"https://github.com/benoitc/erlang-idna",
{tag,"1.0.2"}})
Dependency not available: ssl_verify_hostname-.* ({git,
"https://github.com/deadtrickster/ssl_verify_hostname.erl",
{tag,"1.0.5"}})
** (ArgumentError) argument error
(stdlib) :io.put_chars(#PID<0.26.0>, :unicode, <<69, 82, 82, 79, 82, 58, 32, 99, 111, 109, 112, 105, 108, 101, 32, 102, 97, 105, 108, 101, 100, 32, 119, 104, 105, 108, 101, 32, 112, 114, 111, 99, 101, 115, 115, 105, 110, 103, 32, 47, 104, 111, 109, 101, 47, 114, 107, 114, 97, 117, ...>>)
(mix) lib/mix/shell.ex:78: Mix.Shell.do_cmd/2
(mix) lib/mix/tasks/deps.compile.ex:161: anonymous fn/5 in Mix.Tasks.Deps.Compile.do_command/4
(mix) lib/mix/project.ex:196: Mix.Project.in_project/4
(elixir) lib/file.ex:1061: File.cd!/2
(mix) lib/mix/dep.ex:137: Mix.Dep.in_dependency/3
(mix) lib/mix/tasks/deps.compile.ex:160: Mix.Tasks.Deps.Compile.do_command/4
(mix) lib/mix/tasks/deps.compile.ex:59: anonymous fn/3 in Mix.Tasks.Deps.Compile.compile/1
尽管我已经搜索了此输出的不同部分，但我找不到任何有用的信息。