Jalal Elmansouri developed flexible build directory management for the qmk/qmk_firmware repository, focusing on making the build process more configurable and reproducible. He modified the mass_compile.py script to honor the BUILD_DIR environment variable, ensuring that build logs and object file paths adapt dynamically rather than relying on hardcoded locations. This approach improved both CI reliability and local development flexibility by allowing environment-driven configuration. Jalal applied his expertise in Python scripting, build system management, and environment variable handling to streamline workflows and support scalable development. The work demonstrated thoughtful integration of configuration management within an established Python-based build system.