{
  description = "Cross-platform TUI music player development shell";

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

  outputs =
    { nixpkgs, ... }:
    let
      systems = [
        "aarch64-darwin"
        "x86_64-darwin"
        "aarch64-linux"
        "x86_64-linux"
      ];

      forAllSystems = nixpkgs.lib.genAttrs systems;

      perSystem =
        system:
        let
          pkgs = import nixpkgs { inherit system; };
          lib = pkgs.lib;

          linuxAudioRuntime = lib.optionals pkgs.stdenv.isLinux [
            pkgs.alsa-lib
            pkgs.pulseaudio
          ];

          tui-build = pkgs.writeShellApplication {
            name = "tui-build";
            runtimeInputs = [
              pkgs.cmake
              pkgs.ninja
            ];
            text = ''
              cmake -S . -B build -G Ninja
              cmake --build build
            '';
          };

          tui-run = pkgs.writeShellApplication {
            name = "tui-run";
            runtimeInputs = [
              tui-build
            ];
            text = ''
              tui-build
              exec ./build/tui-music-player "$@"
            '';
          };

          tui-clean = pkgs.writeShellApplication {
            name = "tui-clean";
            text = ''
              rm -rf build tui-music-player tui-music-player.exe
            '';
          };
        in
        {
          packages.default = pkgs.stdenv.mkDerivation {
            pname = "tui-music-player";
            version = "0.1.0";
            src = ./.;

            nativeBuildInputs = [
              pkgs.cmake
              pkgs.ninja
            ];

            buildInputs = linuxAudioRuntime;

            cmakeFlags = [
              "-G"
              "Ninja"
            ];

            installPhase = ''
              runHook preInstall
              install -Dm755 tui-music-player "$out/bin/tui-music-player"
              runHook postInstall
            '';
          };

          devShells.default = pkgs.mkShell {
            packages =
              [
                pkgs.cmake
                pkgs.ninja
                pkgs.gnumake
                pkgs.pkg-config
                pkgs.clang-tools
                tui-build
                tui-run
                tui-clean
              ]
              ++ linuxAudioRuntime;

            shellHook = ''
              mkdir -p music
              echo "TUI Music Player devshell"
              echo "  tui-build  - configure and build with CMake + Ninja"
              echo "  tui-run    - build, then run ./build/tui-music-player"
              echo "  tui-clean  - remove generated build outputs"
              echo "Put audio files in ./music, then run: tui-run"
            '';
          };
        };
    in
    {
      packages = forAllSystems (system: (perSystem system).packages);
      devShells = forAllSystems (system: (perSystem system).devShells);
    };
}