Worked on the Saghen/nixpkgs repository to deliver a targeted feature upgrade focused on dependency management. Upgraded the Zydis and Zycore libraries to versions 4.1.1 and 1.5.2, respectively, by updating version strings and SHA256 hashes within the Nix package definitions. This approach ensured that builds consistently pulled the latest, most secure libraries, improving reproducibility and compatibility for downstream users. Leveraged skills in build systems and package management, specifically using the Nix language, to validate build compatibility across multiple configurations. The work addressed the risk of outdated dependencies and supported a more stable, reliable development environment for package consumers.