hex release can not be used with plain Erlang

[RoadRunnr]

Adding the hex packaged version as dependency into rebar.config results in a failure to build:

 ===> Compiling elixir_make
===> Error building application elixir_make:
     No project builder is configured for type mix

That means it is not possible to have an Erlang only build.

The only way to circumvent that is to use a direct git dependency {crc, {git, "https://github.com/TattdCodeMonkey/crc.git", {tag, "v0.10.5"}}}

Please make it possible to use this project in an Erlang only / no Elixir project with a simple rebar dependency like {crc, "0.10.5"}