Update README.md

README.md

@@ -16,19 +16,26 @@ copied to temp storage.
 pip install gguf-diffusion
 ```
 
-building the bundled engine requires a C/C++ toolchain and CMake ≥ 3.15
-(on Windows: MSVC Build Tools). The engine source is resolved from a sibling
-`../diffusion` checkout, a vendored `vendor/diffusion` copy (see
-`scripts/vendor_engine.py`), or `GGUF_DIFFUSION_ENGINE_DIR`. GPU backends are
-opt-in at build time via the engine's own options:
+## build it from source code
 
+CUDA (NVIDIA)
 ```bash
-CMAKE_ARGS="-DSD_CUDA=ON"    pip install gguf-diffusion   # NVIDIA (CUDA)
-CMAKE_ARGS="-DSD_HIPBLAS=ON" pip install gguf-diffusion   # AMD (ROCm/HIP)
-CMAKE_ARGS="-DSD_METAL=ON"   pip install gguf-diffusion   # Apple (macOS)
-CMAKE_ARGS="-DSD_VULKAN=ON"  pip install gguf-diffusion   # Vulkan
+$env:CMAKE_ARGS="-DSD_CUDA=ON"
+pip install gguf_diffusion-0.0.2.tar
 ```
 
+ROCm/HIP (AMD)
+```bash
+$env:CMAKE_ARGS="-DSD_HIPBLAS=ON"
+pip install gguf_diffusion-0.0.2.tar
+```
+
+macOS/Metal (Apple)
+```bash
+pip install gguf_diffusion-0.0.2.tar
+```
+
+
 ## usage
 
 ```bash