Worked on the macports/macports-ports repository to deliver an upgrade of the NektarPP package to version 5.9.0, focusing on enhancing build stability and compatibility for downstream ports. The work involved updating dependencies and revising build scripts using CMake and Python to accommodate changes introduced in the new release. Emphasis was placed on reliability and maintainability, aiming to reduce the risk of future breakages and support upcoming features. No major bugs were addressed during this period, as the primary goal was to ensure a smooth transition for users and maintainers relying on the updated package and its associated build configurations.