Rafal Lalík focused on enhancing build reliability and maintainability in CMake-based projects over a two-month period. Working within the fmtlib/fmt repository, he addressed initialization issues by ensuring the FMT_HEADERS variable was properly set, which prevented errors in pedantic CMake configurations and stabilized the build process. In the ferdymercury/root repository, he implemented a validation step in the build system to check for the existence of target include directories before processing, thereby avoiding CMake errors when using ROOT_GENERATE_DICTIONARY with MODULE. His work demonstrated depth in build configuration and system design, leveraging CMake to improve developer experience and CI stability.