Ondrej Ille focused on improving build reliability for the emsec/hal repository by addressing compatibility issues specific to RHEL8 environments. During this period, he identified and resolved a formatting problem caused by missing C++ standard library headers, specifically <iomanip>, in critical source files. By implementing a targeted header inclusion in boolean_function.cpp and utils.cpp, Ondrej restored proper formatting capabilities and ensured stable builds on RHEL8 systems. His work demonstrated careful risk management by limiting changes to a single, well-scoped commit. Ondrej applied his expertise in C++ development and build systems to enhance cross-platform stability without introducing unnecessary complexity or feature changes.