Worked on the Saghen/nixpkgs repository to deliver a critical migration of the Deepin Calculator package from Qt 5 to Qt 6, ensuring continued buildability and compatibility within the nixpkgs ecosystem. The approach involved updating the calculator’s dependencies, version, and related build tools to align with the Qt 6 toolchain, thereby reducing maintenance risk and supporting downstream packaging workflows. Leveraged expertise in build systems, package management, and the Nix language to implement these changes. This work preserved continuous integration and build processes for downstream users, addressing evolving toolchain requirements and maintaining the reliability of the package within the repository.