Elixir app that depends on Rust

I’m trying to deploy an Elixir app.
When dependency “tds_enconding” was compiling ( that depends on rust ) an error occurred.

Do I need to install Rust? How?

Jan 4 06:02:13 PM  ==> tds_encoding
Jan 4 06:02:13 PM  Compiling 1 file (.ex)
Jan 4 06:02:14 PM  error: failed to get `encoding` as a dependency of package `tds_encoding v0.2.0 (/opt/render/project/src/deps/tds_encoding/native/tds_encoding)`
Jan 4 06:02:14 PM  Caused by:
Jan 4 06:02:14 PM    failed to create directory `/usr/local/cargo/registry/index/github.com-1ecc6299db9ec823`
Jan 4 06:02:14 PM  Caused by:
Jan 4 06:02:14 PM    Read-only file system (os error 30)
Jan 4 06:02:14 PM  == Compilation error in file lib/tds_encoding.ex ==
Jan 4 06:02:14 PM  ** (ArgumentError) errors were found at the given arguments:
Jan 4 06:02:14 PM    * 1st argument: not an iodata term
Jan 4 06:02:14 PM      :erlang.iolist_to_binary(:ok)
Jan 4 06:02:14 PM      (jason 1.3.0) lib/jason.ex:69: Jason.decode/2
Jan 4 06:02:14 PM      (jason 1.3.0) lib/jason.ex:90: Jason.decode!/2
Jan 4 06:02:14 PM      (rustler 0.22.2) lib/rustler/compiler/config.ex:89: Rustler.Compiler.Config.external_resources/2
Jan 4 06:02:14 PM      (rustler 0.22.2) lib/rustler/compiler/config.ex:69: Rustler.Compiler.Config.build/1
Jan 4 06:02:14 PM      (rustler 0.22.2) lib/rustler/compiler.ex:9: Rustler.Compiler.compile_crate/2
Jan 4 06:02:14 PM      lib/tds_encoding.ex:37: (module)
Jan 4 06:02:14 PM  ** (exit) exited in: GenServer.call(Mix.State, {:update, {Map, :put, [:env, :prod]}}, :infinity)
Jan 4 06:02:14 PM      ** (EXIT) no process: the process is not alive or there's no process currently associated with the given name, possibly because its application isn't started
Jan 4 06:02:14 PM      (elixir 1.13.1) lib/gen_server.ex:1019: GenServer.call/3
Jan 4 06:02:14 PM      (mix 1.13.1) lib/mix/dep.ex:270: Mix.Dep.in_dependency/3
Jan 4 06:02:14 PM      (mix 1.13.1) lib/mix/tasks/deps.compile.ex:89: anonymous fn/4 in Mix.Tasks.Deps.Compile.compile/2
Jan 4 06:02:14 PM      (elixir 1.13.1) lib/enum.ex:1593: Enum."-map/2-lists^map/1-0-"/2
Jan 4 06:02:14 PM      (elixir 1.13.1) lib/enum.ex:1593: Enum."-map/2-lists^map/1-0-"/2
Jan 4 06:02:14 PM      (mix 1.13.1) lib/mix/tasks/deps.compile.ex:79: Mix.Tasks.Deps.Compile.compile/2
Jan 4 06:02:14 PM      (mix 1.13.1) lib/mix/tasks/deps.loadpaths.ex:75: Mix.Tasks.Deps.Loadpaths.deps_check/2
Jan 4 06:02:14 PM      (mix 1.13.1) lib/mix/tasks/deps.loadpaths.ex:34: Mix.Tasks.Deps.Loadpaths.run/1
Jan 4 06:02:19 PM  ==> Build failed 😞

Hey Alex,
So as it is right now, as you’ve found Rust isn’t available in our Elixir native environment. This leaves moving to a Docker deployment as your best option to include the dependencies you need. But I would suggest that you add a request at feedback.render.com to request Rust is added to the Elixir env - and we can gauge the popularity of this.

Regards,

John B

Rust used to be in the default Elixir “image” Render uses, when did it get removed? Is there documentation around what is included in the default installs for supported languages?