Tomoya Otabi modernized and stabilized packaging workflows across multiple nixpkgs repositories, including srid/nixpkgs, by updating over 20 Python 3.12 packages, refactoring build systems, and enabling new Jupyter collaboration modules. He adopted PyPA builder standards, improved CI reliability, and addressed cross-platform build issues, particularly for macOS. His work involved deep integration with Nix, Python, and Rust, focusing on dependency management, automated update tooling, and test enablement. By migrating legacy packaging to pyproject-based builds and standardizing infrastructure, Tomoya enhanced maintainability, security, and release readiness, demonstrating a thorough, systems-oriented approach to cross-platform package management and continuous integration.