Worked on improving build system reliability for the flipperdevices/u-boot repository by addressing a critical issue in the Makefile configuration. Focused on Makefile scripting and build system configuration, the developer identified and fixed a bug where an extra dash in KBUILD_CFLAGS caused debug builds to fail when CONFIG_CC_OPTIMIZE_FOR_DEBUG was enabled. This targeted patch enhanced the stability of debug-enabled configurations, reducing build failures in continuous integration workflows. The work demonstrated careful attention to patch quality, including proper Signed-off-by and Reviewed-by practices, and contributed to a more robust and maintainable build pipeline for C-based embedded development environments.