During September 2025, Lukas Promber focused on stabilizing and modernizing build systems for the ROCm/TheRock and ROCm/rccl repositories. He enabled CMake 4 compatibility on Linux by updating minimum required CMake versions and adjusting policy settings, ensuring smoother cross-platform development. In ROCm/rccl, Lukas aligned test and main build configurations by raising the minimum CMake version and restructuring dependency placement to improve test reliability. His work centered on build system configuration and cross-repo alignment, leveraging expertise in CMake and cross-platform workflows. The updates reduced CI and build friction, laying groundwork for more maintainable and future-proof build processes across both projects.