During December 2024, Alexei improved build stability for the godotengine/godot repository by addressing legacy environment compatibility issues. He focused on enhancing Mold Linker Detection, implementing a PATH-based approach to ensure the build system could reliably locate the mold linker on older systems. Using Python scripting and system programming skills, Alexei fixed mold-search failures that previously caused build errors in legacy toolchains. His work involved careful environment configuration and cross-platform considerations, resulting in more robust onboarding for developers working with diverse setups. The solution was delivered through concise, well-documented commits, reflecting a thoughtful and targeted approach to infrastructure reliability.