Solve your dependency puzzle

curl -fsSL https://pixi.sh/install.sh | bash

~/project
➜ pixi build
✓ Build project successfully into /home/user/project/project-0.1.0.conda

➜ pixi init project
✓ Created /home/user/project/pixi.toml

➜ cd project
~/project
➜ pixi add python numpy cmake
✓ Added python >=3.13.0,<3.14
✓ Added numpy >=2.1.3,<3
✓ Added cmake >=3.31.1,<4

~/project
➜ pixi run python --version
Python 3.13.0

~/project
➜ pixi add python==3.10
✓ Added python==3.10

~/project
➜ pixi run python --version
Python 3.10.0

~/project
➜ cat pixi.toml
[project]
name = "project"
version = "0.1.0"
description = "Example project"
authors = ["Pixi <hi@prefix.dev>"]
channels = ["conda-forge"]
platforms = ["linux-64", "win-64", "osx-arm64", "osx-64"]

[tasks]
start = "python main.py"

[dependencies]
python = ">=3.13.0,<3.14"
numpy = ">=2.1.3,<3"
cmake = ">=3.31.1,<4"