During March 2025, this developer focused on improving build system reliability for the AliceO2Group/AliceO2 repository by addressing CUDA header dependency issues. They implemented a conditional inclusion of the CUDA runtime header in Definitions.h, ensuring that non-CUDA builds remained unaffected and free from unnecessary dependencies. Using C++ and build system expertise, the developer’s approach reduced header conflicts and improved overall build stability, particularly for CPU-only configurations. This targeted bug fix streamlined the build process, shortened rebuild times, and simplified ongoing maintenance. The work demonstrated a thoughtful application of conditional compilation practices to enhance long-term maintainability and developer productivity.