{ lib
, stdenv
, fetchgit
, elixir
, erlang
, rebar3
, git
, cacert
, glibcLocales
}:

stdenv.mkDerivation rec {
  pname = "systant";
  version = "0.1.0";

  src = fetchgit {
    url = "https://git.ryanpandya.com/ryan/systant.git";
    rev = "92fc90e3b470dd2d11ba3a84745e33195e8e9db3";
    sha256 = lib.fakeSha256; # Replace with actual hash after first build attempt
  };

  nativeBuildInputs = [
    elixir
    erlang
    rebar3
    git
    cacert
    glibcLocales
  ];

  buildPhase = ''
    runHook preBuild
    
    # Set up environment for Mix/Hex
    export MIX_ENV=prod
    export MIX_HOME=$TMPDIR/mix
    export HEX_HOME=$TMPDIR/hex
    export REBAR_CACHE_DIR=$TMPDIR/rebar3
    
    # SSL and locale configuration
    export SSL_CERT_FILE=${cacert}/etc/ssl/certs/ca-bundle.crt
    export LOCALE_ARCHIVE=${glibcLocales}/lib/locale/locale-archive
    export LC_ALL=en_US.UTF-8
    export ELIXIR_ERL_OPTIONS="+fnu"
    
    # Install hex and rebar locally
    mix local.hex --force
    mix local.rebar --force
    
    # Get dependencies and build release
    mix deps.get --only=prod
    mix release
    
    runHook postBuild
  '';

  installPhase = ''
    runHook preInstall
    
    mkdir -p $out
    cp -r _build/prod/rel/systant/* $out/
    
    runHook postInstall
  '';

  meta = with lib; {
    description = "Systant - System stats MQTT daemon for monitoring system metrics";
    homepage = "https://git.ryanpandya.com/ryan/systant";
    license = licenses.mit; # Update if different
    maintainers = [ ]; # Add your maintainer info if desired
    platforms = platforms.linux;
  };
}