Worked on the pytorch/tensordict repository to introduce flexible PyTorch version selection for local builds, addressing the need for reproducible development environments. Enabled developers to specify the desired PyTorch version by activating environment-variable-based configuration within setup.py, specifically leveraging the PYTORCH_VERSION variable. This approach involved modifying the build system configuration and managing environment variables to streamline local development and reduce version-related troubleshooting. The implementation, written in Python, improved onboarding by minimizing guesswork around dependency versions. No major bugs were reported or fixed during this period, with the primary focus on enhancing build reproducibility and supporting more efficient local workflows.