Worked on the hmemcpy/nixpkgs repository to deliver targeted package upgrades and maintain reproducible build environments using Nix. Focused on upgrading the datasets and Ultralytics Python packages, ensuring downstream environments remained current with stable releases. Applied package management and build systems expertise to pin versions and update source hashes, reducing deployment risk and supporting consistent builds. Introduced a new test case to validate multichannel support as part of the Ultralytics upgrade, enhancing test coverage. Maintained a minimal change surface to align with upstream releases while prioritizing stability and traceability. All work was completed using Nix and Python within a two-month period.