Mathias worked on the ublue-os/akmods repository, focusing on enhancing build flexibility for kernel modules by introducing dynamic ZFS minor version selection based on kernel flavor. He restructured the build system to support both CI and production environments, moving version assignment logic from static configuration files into a more maintainable Justfile. This approach reduced manual configuration and streamlined multi-environment support. Utilizing skills in containerization, DevOps, and shell scripting, Mathias implemented the solution using Makefile and shell, enabling automated, flavor-based versioning. The work demonstrated thoughtful engineering depth by addressing configurability and maintainability, though the period did not include major bug fixes.