Worked on build system configuration for the BOINC/boinc repository, focusing on improving build hygiene for MinGW environments. Addressed a specific issue by modifying the Makefile.mingw to exclude the str_replace.h header from installation, which reduced unnecessary build output and minimized the risk of header-related inclusion errors. Utilized Makefile scripting and build system expertise to streamline the installation process, ensuring that only essential files are included in the final build. This targeted bug fix contributed to a cleaner and more maintainable build process, reflecting a detail-oriented approach to build system management and configuration within a complex open-source project.