{
  lib,
  pkgs,
  mkShell,
  elixir,
  elixir-ls,
  inotify-tools,
  entr,
}:
mkShell {
  packages =
    [elixir elixir-ls entr]
    ++ lib.lists.optional (pkgs.system == "x86_64-linux") inotify-tools
    ++ lib.lists.optionals (pkgs.system == "aarch64-darwin") (with pkgs.darwin.apple_sdk.frameworks; [
      CoreFoundation
      CoreServices
    ]);
  shellHook = ''
    mkdir -p .nix-mix
    mkdir -p .nix-hex
    export MIX_HOME=$PWD/.nix-mix
    export HEX_HOME=$PWD/.nix-hex
    export AOC_BASE=$PWD
  '';
}