{
  description = "Org-garden — org-roam to website publishing pipeline";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
    flake-utils.url = "github:numtide/flake-utils";
  };

  outputs = { self, nixpkgs, flake-utils }:
    let
      # System-independent outputs
      nixosModule = import ./nix/module.nix;
    in
    {
      # NixOS module (system-independent)
      nixosModules.default = nixosModule;
      nixosModules.org-garden = nixosModule;
    } //
    flake-utils.lib.eachDefaultSystem (system:
      let
        pkgs = import nixpkgs { inherit system; };
        fs = pkgs.lib.fileset;

        # =========================================================================
        # Emacs with ox-hugo
        # =========================================================================
        # Needed at runtime by the escript (export calls `emacs --batch` with ox-hugo)
        emacsWithOxHugo = (pkgs.emacsPackagesFor pkgs.emacs-nox).emacsWithPackages
          (epkgs: [ epkgs.ox-hugo ]);

        # =========================================================================
        # Elixir Pipeline
        # =========================================================================

        # Pre-fetched Hex/Mix dependencies
        mixDeps = pkgs.beamPackages.fetchMixDeps {
          pname = "org-garden-mix-deps";
          version = "0.1.0";
          src = fs.toSource {
            root = ./.;
            fileset = fs.unions [
              ./mix.exs
              ./mix.lock
            ];
          };
          sha256 = "sha256-t8fPBGFC7wHfxgdRNEwI1k730nS7lzF750pvh0ukb7g=";
        };

        # Compiled org-garden escript
        orgGardenEscript = pkgs.beamPackages.mixRelease {
          pname = "org-garden";
          version = "0.1.0";
          src = fs.toSource {
            root = ./.;
            fileset = fs.unions [
              ./mix.exs
              ./mix.lock
              ./lib
              ./config
              ./rel
            ];
          };
          escriptBinName = "org_garden";
          mixFodDeps = mixDeps;
          stripDebug = true;
        };

        # =========================================================================
        # Quartz (fetched from upstream, patched)
        # =========================================================================

        # Pin to specific upstream commit
        quartzVersion = "4.5.2";
        quartzRev = "ec00a40aefca73596ab76e3ebe3a8e1129b43688";

        # Fetch upstream Quartz source
        quartzSrc = pkgs.fetchFromGitHub {
          owner = "jackyzha0";
          repo = "quartz";
          rev = quartzRev;
          hash = "sha256-HdtQB5+SRWiypOvAJuJa3Nodl4JHehp2Mz6Rj5gOG0w=";
        };

        # Apply our patches to Quartz
        quartzPatched = pkgs.runCommand "quartz-patched-${quartzVersion}" {
          src = quartzSrc;
        } ''
          cp -r $src $out
          chmod -R u+w $out
          cd $out
          patch -p1 < ${./patches/01-glob-gitignore.patch}
          patch -p1 < ${./patches/02-build-gitignore.patch}
          patch -p1 < ${./patches/03-static-hugo.patch}
          patch -p1 < ${./patches/04-oxhugofm-figure.patch}
        '';

        # Pre-fetch Quartz npm dependencies
        quartzDeps = pkgs.buildNpmPackage {
          pname = "org-garden-quartz-deps";
          version = quartzVersion;
          src = quartzPatched;
          npmDepsHash = "sha256-7u+VlIx44B3/ivM9vLMIOn+e4TL4eS6B682vhS+Ikb4=";
          dontBuild = true;
          installPhase = ''
            mkdir -p $out
            cp -r node_modules $out/node_modules
          '';
        };

        # =========================================================================
        # Combined Application
        # =========================================================================

        # Wrapped org-garden with Quartz bundled
        orgGardenApp = pkgs.writeShellApplication {
          name = "org-garden";
          runtimeInputs = [ emacsWithOxHugo pkgs.inotify-tools pkgs.nodejs_22 ];
          text = ''
            # Set up Quartz working directory
            QUARTZ_WORK=$(mktemp -d)
            trap 'rm -rf "$QUARTZ_WORK"' EXIT

            # Copy patched Quartz source
            cp -r ${quartzPatched}/. "$QUARTZ_WORK/"
            chmod -R u+w "$QUARTZ_WORK"

            # Copy default config files (explicit filenames to avoid nix store hash prefix)
            cp ${./quartz-config/quartz.config.ts} "$QUARTZ_WORK/quartz.config.ts"
            cp ${./quartz-config/quartz.layout.ts} "$QUARTZ_WORK/quartz.layout.ts"
            cp ${./quartz-config/globals.d.ts} "$QUARTZ_WORK/globals.d.ts"
            cp ${./quartz-config/index.d.ts} "$QUARTZ_WORK/index.d.ts"

            # Link pre-built node_modules
            ln -s ${quartzDeps}/node_modules "$QUARTZ_WORK/node_modules"

            export QUARTZ_PATH="$QUARTZ_WORK"
            export NODE_PATH="${pkgs.nodejs_22}/bin/node"

            exec ${orgGardenEscript}/bin/org_garden "$@"
          '';
        };

      in
      {
        packages.default = orgGardenApp;
        packages.escript = orgGardenEscript;
        packages.quartz-patched = quartzPatched;

        devShells.default = pkgs.mkShell {
          buildInputs = [
            pkgs.elixir
            pkgs.inotify-tools
            emacsWithOxHugo
            pkgs.nodejs_22
          ];
        };
      });
}