Worked on the Shopify/nixpkgs repository to deliver targeted improvements in package management and system administration using Nix. Upgraded onlyoffice-documentserver to version 8.3.3, updating architecture-specific SHA256 checksums to ensure secure and verifiable downloads, which enhanced the reliability of deployments. Addressed a packaging issue for postfix-tlspol by correctly setting the mainProgram attribute, ensuring the main executable was properly identified and configured. These changes reduced the risk of misconfigured artifacts and improved the consistency of build and deployment processes. The work focused on verified software upgrades and executable configuration, contributing to more reliable CI feedback and streamlined release cycles.