During May 2025, Bernd Machenschalk focused on improving build hygiene for the BOINC/boinc repository by refining the MinGW build process. He addressed a specific issue where the unnecessary str_replace.h header was being installed, which could lead to build noise and potential inclusion errors. By modifying the lib/Makefile.mingw file, Bernd ensured that this header was excluded from installation, resulting in a cleaner and more reliable build output. His work centered on build system configuration using Makefile, demonstrating attention to detail in managing dependencies and installation artifacts. This targeted fix improved maintainability without introducing new features or broader architectural changes.