{
  # TODO
  lib,
  buildPythonPackage,
  fetchFromGitHub,
  hatchling,
  hatch-vcs,
  # haystack-ai,
  # boilerpy3,
  # events,
  # httpx,
  # jsonschema,
  # lazy-imports,
  # more-itertools,
  # networkx,
  # pandas,
  # pillow,
  # platformdirs,
  # posthog,
  # prompthub-py,
  # pydantic,
  # quantulum3,
  # rank-bm25,
  # requests,
  # requests-cache,
  # scikit-learn,
  # sseclient-py,
  # tenacity,
  # tiktoken,
  # tqdm,
  # transformers,
  # openai-whisper,
  # boto3,
  # botocore,
  # # , beir
  # selenium,
  # coverage,
  # dulwich,
  # # , jupytercontrib
  # mkdocs,
  # mypy,
  # pre-commit,
  # psutil,
  # # , pydoc-markdown
  # pylint,
  # pytest,
  # pytest-asyncio,
  # pytest-cov,
  # # , pytest-custom-exit-code
  # python-multipart,
  # reno,
  # responses,
  # toml,
  # tox,
  # watchdog,
  # elastic-transport,
  # elasticsearch,
  # # , azure-ai-formrecognizer
  # beautifulsoup4,
  # markdown,
  # python-docx,
  # python-frontmatter,
  # python-magic,
  # tika,
  # black,
  # huggingface-hub,
  # sentence-transformers,
  # mlflow,
  # rapidfuzz,
  # scipy,
  # seqeval,
  # pdf2image,
  # pytesseract,
  # faiss,
  # # , faiss-gpu
  # pinecone-client,
  # onnxruntime,
  # onnxruntime-tools,
  # # , onnxruntime-gpu
  # opensearch-py,
  # pymupdf,
  # langdetect,
  # nltk,
  # canals,
  # jinja2,
  # openai,
  # aiorwlock,
  # ray,
  # psycopg2,
  # sqlalchemy,
  # sqlalchemy-utils,
  # weaviate-client,
}:

buildPythonPackage rec {
  pname = "haystack-experimental";
  version = "0.19.0";
  pyproject = true;

  src = fetchFromGitHub {
    owner = "deepset-ai";
    repo = "haystack-experimental";
    tag = "v${version}";
    hash = "sha256-G3rmlIApgG3CEpIG/9/wgTIMIrD35hZZMJCKdlwKpxA=";
  };

  # nativeBuildInputs = [
  #   hatchling
  # ];

  # pythonRemoveDeps = [
  #   # We call it faiss, not faiss-cpu.
  #   "faiss-cpu"
  # ];

  dontCheckRuntimeDeps = true;

  propagatedBuildInputs = [
    hatchling
    hatch-vcs
    # haystack-ai
    # boilerpy3
    # events
    # httpx
    # jsonschema
    # lazy-imports
    # more-itertools
    # networkx
    # pandas
    # pillow
    # platformdirs
    # posthog
    # prompthub-py
    # pydantic
    # quantulum3
    # rank-bm25
    # requests
    # requests-cache
    # scikit-learn
    # sseclient-py
    # tenacity
    # tiktoken
    # tqdm
    # transformers
  ];

  env.HOME = "$(mktemp -d)";

  # optional-dependencies = {
  #   # all = [
  #   #   farm-haystack
  #   # ];
  #   # all-gpu = [
  #   #   farm-haystack
  #   # ];
  #   audio = [ openai-whisper ];
  #   aws = [
  #     boto3
  #     botocore
  #   ];
  #   # beir = [
  #   #   beir
  #   # ];
  #   colab = [ pillow ];
  #   crawler = [ selenium ];
  #   dev = [
  #     coverage
  #     dulwich
  #     # jupytercontrib
  #     mkdocs
  #     mypy
  #     pre-commit
  #     psutil
  #     # pydoc-markdown
  #     pylint
  #     pytest
  #     pytest-asyncio
  #     pytest-cov
  #     # pytest-custom-exit-code
  #     python-multipart
  #     reno
  #     responses
  #     toml
  #     tox
  #     watchdog
  #   ];
  #   elasticsearch7 = [
  #     elastic-transport
  #     elasticsearch
  #   ];
  #   elasticsearch8 = [
  #     elastic-transport
  #     elasticsearch
  #   ];
  #   file-conversion = [
  #     # azure-ai-formrecognizer
  #     beautifulsoup4
  #     markdown
  #     python-docx
  #     python-frontmatter
  #     python-magic
  #     # python-magic-bin
  #     tika
  #   ];
  #   formatting = [ black ];
  #   inference = [
  #     huggingface-hub
  #     sentence-transformers
  #     transformers
  #   ];
  #   metrics = [
  #     mlflow
  #     rapidfuzz
  #     scipy
  #     seqeval
  #   ];
  #   ocr = [
  #     pdf2image
  #     pytesseract
  #   ];
  #   only-faiss = [ faiss ];
  #   # only-faiss-gpu = [
  #   #   faiss-gpu
  #   # ];
  #   only-pinecone = [ pinecone-client ];
  #   onnx = [
  #     onnxruntime
  #     onnxruntime-tools
  #   ];
  #   # onnx-gpu = [
  #   #   onnxruntime-gpu
  #   #   onnxruntime-tools
  #   # ];
  #   opensearch = [ opensearch-py ];
  #   pdf = [ pymupdf ];
  #   preprocessing = [
  #     langdetect
  #     nltk
  #   ];
  #   preview = [
  #     canals
  #     jinja2
  #     lazy-imports
  #     openai
  #     pandas
  #     rank-bm25
  #     requests
  #     tenacity
  #     tqdm
  #   ];
  #   ray = [
  #     aiorwlock
  #     ray
  #   ];
  #   sql = [
  #     psycopg2
  #     sqlalchemy
  #     sqlalchemy-utils
  #   ];
  #   weaviate = [ weaviate-client ];
  # };

  # the setup for test is intensive, hopefully can be done at some point
  doCheck = false;

  # pythonImportsCheck = [ "haystack" ];

  meta = {
    description = "Experimental features for Haystack";
    longDescription = ''
      Experimental features for Haystack
    '';
    changelog = "https://github.com/deepset-ai/haystack-experimental/releases/tag/${src.tag}";
    homepage = "https://github.com/deepset-ai/haystack-experimental";
    license = lib.licenses.asl20;
    maintainers = with lib.maintainers; [ happysalada ];
    # https://github.com/deepset-ai/haystack/issues/5304
    # broken = false;
  };
}