Worked on the uiua-lang/uiua repository to modernize the development environment by upgrading Nix-based dependencies and refreshing the lockfile. Focused on dependency management using Nix, the work involved updating key components such as crane, flake-parts, and nixpkgs to their latest revisions. This approach ensured that builds remained reproducible and aligned with current security and maintenance standards, reducing drift across development and CI pipelines. By leveraging expertise in Nix and lockfile management, the developer improved the stability and reliability of the toolchain, supporting ongoing efforts to streamline onboarding and maintain up-to-date development tooling without affecting user-facing features.