{
  description = "NodeJS application with mpv, yt-dlp, and pulseaudio dependencies";

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

  outputs = { self, nixpkgs, flake-utils }:
    let
      # Define the NixOS module for the systemd service
      nixosModule = { config, lib, pkgs, ... }:
        let
          cfg = config.services.queuecube;
        in {
          options.services.queuecube = {
            enable = lib.mkEnableOption "QueueCube media player service";
            
            port = lib.mkOption {
              type = lib.types.port;
              default = 3000;
              description = "Port on which QueueCube will listen";
            };

            enable_video = lib.mkOption {
              type = lib.types.bool;
              default = false;
              description = "Enable video playback";
            };

            store_path = lib.mkOption {
              type = lib.types.str;
              default = "/var/tmp/queuecube";
              description = "Path to the store for QueueCube";
            };

            invidious = lib.mkOption {
              type = lib.types.submodule {
                options = {
                  enable = lib.mkOption {
                    type = lib.types.bool;
                    default = false;
                    description = "Enable Invidious";
                  };

                  url = lib.mkOption {
                    type = lib.types.str;
                    default = "http://invidious.nor";
                    description = "URL of the Invidious instance to use";
                  };
                };
              };

              default = {
                enable = false;
                url = "http://invidious.nor";
              };
            };
            
            user = lib.mkOption {
              type = lib.types.str;
              description = "User account under which QueueCube runs (required)";
            };
          };
          
          config = lib.mkIf cfg.enable {
            users.users.${cfg.user} = {
              packages = [ self.packages.${pkgs.system}.queuecube ];
            };
            
            systemd.user.services.queuecube = {
              description = "QueueCube media player service";
              wantedBy = [ "default.target" ];
              after = [ "pipewire.service" "pipewire-pulse.service" ];
              
              serviceConfig = {
                ExecStart = "${self.packages.${pkgs.system}.queuecube}/bin/queuecube";
                Restart = "on-failure";
                RestartSec = 5;
                
                # Allow access to X11 for mpv
                Environment = [ "DISPLAY=:0" ];
              };
              
              environment = {
                PORT = toString cfg.port;
                ENABLE_VIDEO = if cfg.enable_video then "1" else "0";
                USE_INVIDIOUS = if cfg.invidious.enable then "1" else "0";
                INVIDIOUS_BASE_URL = cfg.invidious.url;
                STORE_PATH = cfg.store_path;
              };
            };
          };
        };
    in
    flake-utils.lib.eachDefaultSystem (system:
      let
        pkgs = nixpkgs.legacyPackages.${system};
        
        # Define the package using buildNpmPackage
        queuecube = pkgs.buildNpmPackage {
          pname = "queuecube";
          version = "0.1.0";
          
          src = ./.;

          # Skip the standard buildPhase and provide our own
          dontNpmBuild = true;
          buildPhase = ''
            # First install all dependencies
            npm install
            
            # Then run the build with workspaces flag
            npm run build --workspaces
          '';

          # Runtime dependencies
          buildInputs = with pkgs; [
            mpv
            yt-dlp
            pulseaudio
          ];
          
          # Create a wrapper script to ensure runtime deps are available
          postInstall = ''
            # Create the necessary directories
            mkdir -p $out/lib/node_modules/queuecube
            
            # Copy the entire project with built files
            cp -r . $out/lib/node_modules/queuecube

            # Install the frontend build to the backend dist directory
            mkdir -p $out/lib/node_modules/queuecube/backend/dist/
            cp -r frontend/dist $out/lib/node_modules/queuecube/backend/dist/frontend

            # Create bin directory if it doesn't exist
            mkdir -p $out/bin
            
            # Create executable script
            cat > $out/bin/queuecube <<EOF
            #!/bin/sh
            exec ${pkgs.nodejs}/bin/node $out/lib/node_modules/queuecube/backend/build/server.js
            EOF
            
            # Make it executable
            chmod +x $out/bin/queuecube
            
            # Wrap the program to include runtime deps in PATH
            wrapProgram $out/bin/queuecube \
              --prefix PATH : ${pkgs.lib.makeBinPath [
                pkgs.mpv
                pkgs.yt-dlp
                pkgs.pulseaudio
              ]}
          '';
          
          # Let buildNpmPackage handle npm package hash
          npmDepsHash = "sha256-G+rT0f3wZZmZVDBd4CIswNeUzlmJ+TKy/gmZ0B5GMxY=";
          
          meta = with pkgs.lib; {
            description = "NodeJS application with media playback capabilities";
            platforms = platforms.linux;
          };
        };
        
      in {
        packages = {
          default = queuecube;
          queuecube = queuecube;
        };
        
        apps.default = {
          type = "app";
          program = "${queuecube}/bin/queuecube";
        };
        
        # Development environment
        devShells.default = pkgs.mkShell {
          buildInputs = with pkgs; [
            nodejs_20
            nodePackages.npm
            mpv
            yt-dlp
            pulseaudio
          ];
        };
        
        # Add a basic check to verify the package builds
        checks.queuecube = queuecube;
      }
    ) // {
      # Export the NixOS module
      nixosModules.default = nixosModule;
      nixosModules.queuecube = nixosModule;
    };
}