{
  description = "Hello world flake using uv2nix";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";

    pyproject-nix = {
      url = "github:pyproject-nix/pyproject.nix";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    uv2nix = {
      url = "github:pyproject-nix/uv2nix";
      inputs.pyproject-nix.follows = "pyproject-nix";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    pyproject-build-systems = {
      url = "github:pyproject-nix/build-system-pkgs";
      inputs.pyproject-nix.follows = "pyproject-nix";
      inputs.uv2nix.follows = "uv2nix";
      inputs.nixpkgs.follows = "nixpkgs";
    };
  };

  outputs =
    { nixpkgs
    , uv2nix
    , pyproject-nix
    , pyproject-build-systems
    , ...
    }:
    let
      inherit (nixpkgs) lib;
      forAllSystems = lib.genAttrs lib.systems.flakeExposed;

      # Load a uv workspace from a workspace root.
      # Uv2nix treats all uv projects as workspace projects.
      workspace = uv2nix.lib.workspace.loadWorkspace { workspaceRoot = ./.; };

      # Create package overlay from workspace.
      overlay = workspace.mkPyprojectOverlay {
        # Prefer prebuilt binary wheels as a package source.
        # Sdists are less likely to "just work" because of the metadata missing from uv.lock.
        # Binary wheels are more likely to, but may still require overrides for library dependencies.
        sourcePreference = "wheel"; # or sourcePreference = "sdist";
        # Optionally customise PEP 508 environment
        # environ = {
        #   platform_release = "5.10.65";
        # };
      };

      # Extend generated overlay with build fixups
      #
      # Uv2nix can only work with what it has, and uv.lock is missing essential metadata to perform some builds.
      # This is an additional overlay implementing build fixups.
      # See:
      # - https://pyproject-nix.github.io/uv2nix/FAQ.html

      # Construct package set
      pythonSets = forAllSystems
        (system:
          let
            pkgs = nixpkgs.legacyPackages.${system};
            pyprojectOverrides = _final: _prev: {
              # Implement build fixups here.
            };
            baseSet = pkgs.callPackage pyproject-nix.build.packages {
              python = pkgs.python312;
            };
          in
          # Use base package set from pyproject.nix builders
          baseSet.overrideScope
            (
              lib.composeManyExtensions [
                pyproject-build-systems.overlays.default
                overlay
                pyprojectOverrides
              ]
            ));

    in
    {
      # Package a virtual environment as our main application.
      #
      # Enable no optional dependencies for production build.
      packages = forAllSystems (system:
        let
          pythonSet = pythonSets.${system};
        in
        { default = pythonSet.mkVirtualEnv "name-env" workspace.deps.default; });

      # This example provides two different modes of development:
      # - Impurely using uv to manage virtual environments
      # - Pure development using uv2nix to manage virtual environments
      devShells = forAllSystems
        (system:
          let
            pythonSet = pythonSets.${system};
            pkgs = nixpkgs.legacyPackages.${system};
          in
          {
            # This devShell uses uv2nix to construct a virtual environment purely from Nix, using the same dependency specification as the application.
            # The notable difference is that we also apply another overlay here enabling editable mode ( https://setuptools.pypa.io/en/latest/userguide/development_mode.html ).
            #
            # This means that any changes done to your local files do not require a rebuild.
            default =
              let
                # Create an overlay enabling editable mode for all local dependencies.
                editableOverlay = workspace.mkEditablePyprojectOverlay {
                  # Use environment variable
                  root = "$REPO_ROOT";
                  # Optional: Only enable editable for these packages
                  # members = [ "hello-world" ];
                };

                # Override previous set with our overrideable overlay.
                editablePythonSet = pythonSet.overrideScope editableOverlay;

                # Build virtual environment, with local packages being editable.
                #
                # Enable all optional dependencies for development.
                virtualenv = editablePythonSet.mkVirtualEnv "name-dev-env" workspace.deps.all;

              in
              pkgs.mkShell {
                packages = [
                  virtualenv
                  pkgs.uv
                ];
                shellHook = ''
                      # Undo dependency propagation by nixpkgs.
                  unset PYTHONPATH

                  # Don't create venv using uv
                  export UV_NO_SYNC=1

                  # Prevent uv from downloading managed Python's
                  export UV_PYTHON_DOWNLOADS=never

                  # Get repository root using git. This is expanded at runtime by the editable `.pth` machinery.
                  export REPO_ROOT=$(git rev-parse --show-toplevel)
                '';
              };
          });
    };
}