LHongXu contributed to the Saghen/nixpkgs repository by delivering a targeted migration of the Deepin Calculator package from Qt 5 to Qt 6, ensuring continued compatibility and buildability within the nixpkgs ecosystem. This work involved updating the package version and refactoring related build tools and libraries to align with the new Qt 6 toolchain, directly supporting downstream packaging and CI workflows. Leveraging expertise in build systems, package management, and the Nix language, LHongXu addressed maintenance risks associated with outdated dependencies. The depth of the work is reflected in the careful coordination of dependency updates to preserve stability for downstream users.