Code change:
<ins> { lib, buildNpmPackage, fetchFromGitHub, python3, nixosTests, }: let pname = "open-webui"; version = "0.2.4"; src = fetchFromGitHub { owner = "open-webui"; repo = "open-webui"; rev = "v${version}"; hash = "sha256-jWO0mo26C+QTIX5j3ucDk/no+vQnAh7Q6JwB3lLM83k="; }; frontend = buildNpmPackage { inherit pname version src; npmDepsHash = "sha256-QIgYHZusuq2QD8p8MGsNVhCbz6fR+qP9UuU/kbBkadc="; # Disabling `pyodide:fetch` as it downloads packages during `buildPhase` # Until this is solved, running python packages from the browser will not work. postPatch = '' substituteInPlace package.json  --replace-fail "npm run pyodide:fetch && vite build" "vite build"  ''; env.CYPRESS_INSTALL_BINARY = "0"; # disallow cypress from downloading binaries in sandbox installPhase = '' runHook preInstall mkdir -p $out/share cp -a build $out/share/open-webui runHook postInstall ''; }; in python3.pkgs.buildPythonApplication rec { inherit pname version src; pyproject = true; # The custom hook tries to run `npm install` in `buildPhase`. # We don't have to worry, as nodejs depedencies are managed by `frontend` drv. postPatch = '' substituteInPlace pyproject.toml  --replace-fail '[tool.hatch.build.hooks.custom]' ""  --replace-fail ', build = "open_webui/frontend"' "" ''; pythonRelaxDeps = true; pythonRemoveDeps = [ # using `psycopg2` instead "psycopg2-binary" # using `opencv4` "opencv-python-headless" # package request: https://github.com/NixOS/nixpkgs/issues/317065 "rapidocr-onnxruntime" # package request: https://github.com/NixOS/nixpkgs/issues/317066 "langfuse" # package request: https://github.com/NixOS/nixpkgs/issues/317068 "langchain-chroma" ]; dependencies = with python3.pkgs; [ beautifulsoup4 fastapi uvicorn python-multipart flask flask-cors python-socketio python-jose passlib requests aiohttp peewee peewee-migrate psycopg2 pymysql bcrypt litellm boto3 argon2-cffi apscheduler google-generativeai langchain langchain-community fake-useragent chromadb sentence-transformers pypdf docx2txt python-pptx unstructured markdown pypandoc pandas openpyxl pyxlsb xlrd validators opencv4 fpdf2 rank-bm25 faster-whisper pyjwt black youtube-transcript-api pytube ]; build-system = with python3.pkgs; [ hatchling pythonRelaxDepsHook ]; pythonImportsCheck = [ "open_webui" ]; postInstall = '' wrapProgram $out/bin/open-webui  --set FRONTEND_BUILD_DIR "${frontend}/share/open-webui" ''; passthru.tests = { inherit (nixosTests) open-webui; }; meta = { description = "Full-stack of open-webui. open-webui is a user-friendly WebUI for LLMs (Formerly Ollama WebUI)"; homepage = "https://github.com/open-webui/open-webui"; changelog = "https://github.com/open-webui/open-webui/blob/${src.rev}/CHANGELOG.md"; license = lib.licenses.mit; maintainers = with lib.maintainers; [ shivaraj-bh ]; mainProgram = "open-webui"; }; } </ins>

Related discussion:
text: Project description WebUI service for Large Language Models Video demonstration by : .. basically self-hostable ChatGPT-like service Metadata homepage URL: source URL: license: mit platforms: unix, linux, darwin Additional info Follow-up on for open-webui nixos module. There seems to be an ongoing work on the subject by and on Add a :+1: [reaction] to [issues you find important]. [reaction]: [issues you find important]:
Relevant Merge Request:
Just for reference / workaround here's another nix package:
Thanks for that reference. That pdm tool workaround looks a lot more maintainable for the Python backend. Maybe i'll have time to try another PR in the next weeks. In the meantime and as a much simpler UI i packaged as part of PR It would be great if someone could review it.
I would like to mention that in the latest release switched to , I am not sure of any straightforward way to do this while packaging it for .
I just tested your flake, it's impressive, especially the nice UI at the end showing all the processes ! Regarding open-webui, it would be so nice to have that in !!!
Thank you, planning to have more UIs and devShell integration (for CLI tools that interact with ollama). I would love that too! Although there are a few challenges (like the one I pointed above regarding ), I am willing to contribute here. Also, maintainers are quick to respond, in case we need any upstream contributions to make it happen.