{
  description = "Blender VoiceVox Plugin Development Environment";

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

  outputs =
    {
      self,
      nixpkgs,
      flake-utils,
    }:
    flake-utils.lib.eachDefaultSystem (
      system:
      let
        pkgs = import nixpkgs {
          inherit system;
          config.allowUnfree = true;
        };
      in
      {
        devShells.default = pkgs.mkShell {
          buildInputs = with pkgs; [
            # Python環境
            python311
            python311Packages.pip
            python311Packages.virtualenv
            git

            # C/C++標準ライブラリ（PyTorchなどに必要）
            stdenv.cc.cc.lib
            zlib
            zstd

            # ROCm関連（AMD GPU推論に必要）
            rocmPackages.clr
            rocmPackages.rocm-smi
            rocmPackages.rocm-runtime
          ];

          shellHook = ''
            python --version
            blender --version | head -n 1

            # ROCm環境変数
            export ROCM_PATH="${pkgs.rocmPackages.clr}"
            export HSA_OVERRIDE_GFX_VERSION="11.0.0"  # RX 7900 (RDNA 3 / gfx1100)

            # LD_LIBRARY_PATH: ROCm libraries FIRST (critical for GPU inference)
            export LD_LIBRARY_PATH="${pkgs.rocmPackages.clr}/lib:${pkgs.rocmPackages.rocm-runtime}/lib:${pkgs.stdenv.cc.cc.lib}/lib:${pkgs.zlib}/lib:${pkgs.zstd.out}/lib:$LD_LIBRARY_PATH"

            # venvのセットアップ
            VENV_DIR="$PWD/.venv"
            if [ ! -d "$VENV_DIR" ]; then
              echo "[Setup] Creating Python virtual environment..."
              python -m venv "$VENV_DIR"
            fi

            # venvをアクティベート
            source "$VENV_DIR/bin/activate"

            # PyTorch ROCm版の導入（GPU未認識時のみ）
            if ! python -c "import torch; print(torch.cuda.is_available())" 2>/dev/null | grep -q "True"; then
              echo "[Setup] Installing PyTorch ROCm dependencies..."
              pip install --quiet --pre torch torchvision torchaudio --index-url https://download.pytorch.org/whl/nightly/rocm7.0
            fi

            # プロジェクト依存（requirements.txt）を同期
            if [ -f "$PWD/requirements.txt" ]; then
              echo "[Setup] Syncing Python dependencies from requirements.txt..."
              pip install --quiet -r "$PWD/requirements.txt"
            fi

            # OpenCVは壊れやすいので、import失敗時のみheadlessを強制再導入
            if ! python -c "import cv2" >/dev/null 2>&1; then
              echo "[Setup] Repairing OpenCV (opencv-python-headless)..."
              pip install --quiet --force-reinstall --no-cache-dir opencv-python-headless
            fi

            # Pythonパスにカレントディレクトリを追加
            export PYTHONPATH="$PWD:$PYTHONPATH"

            # アドオンのインストールパスを環境変数として設定
            export BLENDER_USER_SCRIPTS="$HOME/.config/blender/5.0/scripts"
            export BLENDER_USER_ADDONS="$BLENDER_USER_SCRIPTS/addons"

            # 環境変数をファイルに保存（サーバープロセス用）
            # CRITICAL: ROCm library paths MUST come first for GPU inference
            cat > "$PWD/.env" << EOF
LD_LIBRARY_PATH=${pkgs.rocmPackages.clr}/lib:${pkgs.rocmPackages.rocm-runtime}/lib:${pkgs.stdenv.cc.cc.lib}/lib:${pkgs.zlib}/lib:${pkgs.zstd.out}/lib
ROCM_PATH=${pkgs.rocmPackages.clr}
HSA_OVERRIDE_GFX_VERSION=11.0.0
EOF

            echo "[Setup] Environment ready with GPU support"
          '';
        };
      }
    );
}