$ mix test
Compiling NIF crate :rustler_test (/)...
   Compiling lazy_static v0.1.16
   Compiling libc v0.2.17
   Compiling bitflags v0.7.0
   Compiling quote v0.3.5
   Compiling winapi v0.2.8
   Compiling unicode-xid v0.0.3
   Compiling log v0.3.6
   Compiling winapi-build v0.1.1
   Compiling erlang_nif-sys v0.5.4
   Compiling rustc-serialize v0.3.21
   Compiling kernel32-sys v0.2.2
   Compiling syn v0.9.2
   Compiling term v0.4.4
   Compiling rustler v0.12.0 (file:///home/jorendorff/dev/Rustler)
error[E0425]: unresolved function `erlang_nif_sys::enif_thread_type`
   --> /home/jorendorff/dev/Rustler/src/wrapper/nif_interface.rs:237:14
    |
237 |     unsafe { erlang_nif_sys::enif_thread_type() }
    |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no resolution found
    |
    = help: possible candidate is found in another module, you can import it into scope:
    = help:   `use wrapper::nif_interface::enif_thread_type;`

error: aborting due to previous error

Build failed, waiting for other jobs to finish...
error: Could not compile `rustler`.

To learn more, run the command again with --verbose.
** (RuntimeError) Rust NIF compile error (rustc exit code 101)
    lib/task_compile.ex:61: Mix.Tasks.Compile.Rustler.compile_crate_config/2
    (elixir) lib/enum.ex:1184: Enum."-map/2-lists^map/1-0-"/2
    (mix) lib/mix/task.ex:296: Mix.Task.run_task/3
    (elixir) lib/enum.ex:1184: Enum."-map/2-lists^map/1-0-"/2
    (mix) lib/mix/tasks/compile.all.ex:19: anonymous fn/1 in Mix.Tasks.Compile.All.run/1
    (mix) lib/mix/tasks/compile.all.ex:37: Mix.Tasks.Compile.All.with_logger_app/1
    (mix) lib/mix/task.ex:296: Mix.Task.run_task/3
    (mix) lib/mix/tasks/compile.ex:85: Mix.Tasks.Compile.run/1