Pixi is a new package manager for building Underworld2. It uses conda-forge and PyPI under the source packages. It installs them in consistent reproducible environments much like conda, but with the addedd benefit of lock files for deterministic builds.
pixi install to install an environment of uw2
pixi run build to build uw2 in the environment
pixi run test to run the uw2 tests in the pixi environment
pixi shell (in the same directory as pixi.toml) to enter into the environment.