Rafael Ruiz-Lucena focused on enhancing cross-platform build stability for the ferrocene/ferrocene repository, specifically targeting QNX 8 compatibility. He addressed persistent linking failures by introducing an empty __my_thread_exit stub and implemented a QNX version whitelist to prevent regressions when building with the C standard library. Working primarily in Rust and leveraging his expertise in embedded systems and system programming, Rafael codified a build-time shim approach that reduces CI build failures and broadens deployment scenarios. His work laid the foundation for future platform-specific integrations, demonstrating a methodical approach to improving build reliability and supporting ongoing stability across diverse targets.