June 2025 delivered a focused overhaul of the CMake-based build system across ruby/ruby and rubygems/rubygems, aligning configuration and build steps, updating the minimum CMake version to 3.26, and applying an instance-based builder pattern to improve reliability and scalability. In ruby/ruby, the CMakeBuilder revamp introduces separate configuration and build phases, uses output directory variables for more predictable binary placement, and introduces an instance-based approach akin to CargoBuilder. In rubygems/rubygems, the CMake Builder refactor enforces instantiation, ensures compiled binaries are placed in correct gem directories, and aligns packaging with the new builder pattern. These changes lay groundwork for more robust, reproducible builds and smoother CI integration.