Rez

Packages are installed once in a shared location, rather than inside every environment.

When a user requests a tool (e.g., rez env maya-2025 ), Rez creates a temporary, lightweight environment that links to the necessary libraries. Packages are installed once in a shared location,

is an open-source, cross-platform package manager designed to create isolated, reproducible environments for software packages. Unlike traditional package managers (like apt or pip ) that install software directly into a system environment, Rez manages packages in a central repository and resolves dependencies dynamically at runtime. rez env maya-2025 )

Rez is used by various studios in the Animation and VFX industry and is part of the Academy Software Foundation (ASWF) . Rez creates a temporary

Multiple versions of the same software (e.g., Python 2.7 and Python 3.10) can exist simultaneously without conflicting.