Worked on the martinvonz/jj repository to standardize system identification within Nix Flakes by updating the overlay configuration to use final.stdenv.hostPlatform.system, replacing the deprecated final.system reference. This change aligned the project with current Nix package management practices, improving cross-host compatibility and ensuring future maintainability. The update focused on enhancing build reliability and simplifying onboarding for new contributors by adopting the latest Nix standards. Leveraging expertise in Nix and Nix Flakes, the work addressed evolving requirements in the Nix ecosystem, positioning the repository for smoother integration with future updates and reducing technical debt related to outdated configuration patterns.