Worked on the Shopify/nixpkgs repository to deliver a targeted upgrade of the Lokinet package, moving it from version 0.9.11 to 0.9.13. This update involved modifying the version string and updating the tarball SHA256 to maintain reproducible builds, while ensuring compatibility with existing dependencies and downstream consumers. The change was implemented as a single, focused commit, adhering to upstream Lokinet release practices and nixpkgs packaging standards. Utilizing skills in package management and the Nix language, the developer demonstrated disciplined change management, completing the upgrade with minimal risk and no reported bugs, resulting in a straightforward review and integration process.