diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000..887a2c1
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,2 @@
+# SCM syntax highlighting & preventing 3-way merges
+pixi.lock merge=binary linguist-language=YAML linguist-generated=true
diff --git a/.gitignore b/.gitignore
index 6677453..6c2db43 100644
--- a/.gitignore
+++ b/.gitignore
@@ -144,3 +144,7 @@ dmypy.json
 **/tmp/
 **/outputs/skyseg.onnx
 skyseg.onnx
+
+# pixi environments
+.pixi
+*.egg-info
diff --git a/README.md b/README.md
index 6997b27..df9fb4b 100644
--- a/README.md
+++ b/README.md
@@ -35,9 +35,24 @@ First, clone this repository to your local machine, and install the dependencies
 ```bash
 git clone git@github.com:facebookresearch/vggt.git 
 cd vggt
-pip install -r requirements.txt
+```
+### Install with pip
+```bash
+pip install -e .
 ```
 
+### Install and run with pixi
+Download [pixi here](https://pixi.sh)
+
+```bash
+pixi run -e python demo_gradio.py
+```
+
+### Install and run with uv
+Download [uv here](https://docs.astral.sh/uv/getting-started/installation/)
+```bash
+uv run --extra demo demo_gradio.py
+```
 
 Now, try the model with just a few lines of code:
 
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..dda64e8
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,49 @@
+[project]
+authors = [{ name = "Jianyuan Wang", email = "jianyuan@robots.ox.ac.uk" }]
+dependencies = [
+    "torch>=2.3.1",
+    "torchvision>=0.18.1",
+    "numpy<2",
+    "Pillow",
+    "huggingface_hub",
+    "einops",
+    "safetensors",
+]
+name = "vggt"
+requires-python = ">= 3.11"
+version = "0.1.0"
+
+[project.optional-dependencies]
+demo = [
+    "gradio==5.17.1",
+    "viser==0.2.23",
+    "tqdm",
+    "hydra-core",
+    "omegaconf",
+    "opencv-python",
+    "scipy",
+    "onnxruntime",
+    "requests",
+    "trimesh",
+    "matplotlib",
+]
+
+[build-system]
+build-backend = "hatchling.build"
+requires = ["hatchling"]
+
+[tool.hatch.build.targets.wheel]
+packages = ["vggt"]
+
+[tool.pixi.workspace]
+channels = ["conda-forge"]
+platforms = ["linux-64"]
+
+[tool.pixi.pypi-dependencies]
+vggt = { path = ".", editable = true }
+
+[tool.pixi.environments]
+default = { solve-group = "default" }
+demo = { features = ["demo"], solve-group = "default" }
+
+[tool.pixi.tasks]
diff --git a/requirements.txt b/requirements.txt
deleted file mode 100644
index 1cb61a2..0000000
--- a/requirements.txt
+++ /dev/null
@@ -1,7 +0,0 @@
-torch==2.3.1
-torchvision==0.18.1
-numpy==1.26.1
-Pillow
-huggingface_hub
-einops
-safetensors
diff --git a/requirements_demo.txt b/requirements_demo.txt
deleted file mode 100644
index efd6f5e..0000000
--- a/requirements_demo.txt
+++ /dev/null
@@ -1,11 +0,0 @@
-gradio==5.17.1
-viser==0.2.23
-tqdm
-hydra-core
-omegaconf
-opencv-python
-scipy
-onnxruntime
-requests
-trimesh
-matplotlib