Worked on dependency and build system improvements within the Rust ecosystem, focusing on reproducibility and packaging hygiene. In the Shopify/nixpkgs repository, delivered a targeted upgrade of the pipeline package to v2.5.0, updating source fetcher details and synchronizing Cargo.toml and Cargo.lock hashes to ensure compatibility and stable CI pipelines. In GaloisInc/nixpkgs, maintained Coppwr by upgrading it to version 1.6.1, refreshing dependencies and build metadata to support downstream consumers. Used Nix and Rust to manage package updates, emphasizing reliable builds and minimal downstream risk. The work demonstrated careful attention to build systems, dependency management, and package stability.