{
  lib,
  python3Packages,
  fetchFromGitHub,
  fetchurl,
  makeWrapper,
}:

let
  cerebras-cloud-sdk = python3Packages.buildPythonPackage rec {
    pname = "cerebras-cloud-sdk";
    version = "1.67.0";
    pyproject = true;

    src = fetchurl {
      url = "https://files.pythonhosted.org/packages/92/12/c201f07582068141e88f9a523ab02fdc97de58f2f7c0df775c6c52b9d8dd/cerebras_cloud_sdk-1.67.0.tar.gz";
      hash = "sha256-Ou1vhsbHqD7p1M+wiirOoInOvyr1uK7RFu95mVpPSBM=";
    };

    build-system = with python3Packages; [
      hatchling
      hatch-fancy-pypi-readme
    ];

    postPatch = ''
      sed -i 's/hatchling==[0-9.]*/hatchling/' pyproject.toml
    '';

    dependencies = with python3Packages; [
      anyio
      distro
      httpx
      pydantic
      sniffio
      typing-extensions
    ];

    doCheck = false;

    meta = {
      description = "Python SDK for Cerebras AI platform";
      homepage = "https://github.com/CerebrasAI/cerebras-cloud-sdk-python";
      license = lib.licenses.asl20;
    };
  };

  pyDeps = with python3Packages; [
    fastapi
    uvicorn
    google-genai
    cerebras-cloud-sdk
    groq
    mistralai
    requests
    python-dotenv
    pydantic
    httpx
  ];
in
python3Packages.buildPythonApplication {
  pname = "relay-free-llm";
  version = "0.1.0+unstable";
  format = "other";

  src = fetchFromGitHub {
    owner = "msmarkgu";
    repo = "RelayFreeLLM";
    rev = "fea9e1642dbbc5c0980885f41b21aa04a30090a2";
    hash = "sha256-ZLAVhJFrVFjqAz0f4qOi2REBDccIc8g2H9b7dcqcYRU=";
  };

  nativeBuildInputs = [ makeWrapper ];
  propagatedBuildInputs = pyDeps;

  installPhase = ''
    runHook preInstall
    mkdir -p $out/lib/relay-free-llm
    cp -r src $out/lib/relay-free-llm/
    runHook postInstall
  '';

  postInstall = ''
    makeWrapper ${python3Packages.python.interpreter} $out/bin/relay-free-llm \
      --add-flags "-m src.server" \
      --prefix PYTHONPATH : "$out/lib/relay-free-llm:$PYTHONPATH"
  '';

  doCheck = false;

  passthru = {
    category = "AI LLM Gateway";
    updateScript = [
      "nix-update"
      "--flake"
      ".#relay-free-llm"
      "--version=branch=main"
    ];
  };

  meta = {
    description = "RESTful API to route user prompts to various AI model providers";
    homepage = "https://github.com/msmarkgu/RelayFreeLLM";
    license = lib.licenses.mit;
    mainProgram = "relay-free-llm";
    platforms = lib.platforms.all;
  };
}