Simon Hill focused on enhancing the build system for the cucumber/gherkin repository by enforcing a minimum CMake version of 3.5. He updated the CMakeLists.txt file, ensuring the cmake_minimum_required command precedes the project declaration, which aligns with best practices and prevents deprecation warnings. Working primarily with C and CMake, Simon’s changes improved build reliability across development and CI environments, reducing compatibility issues with newer CMake features. This update also streamlined onboarding for new contributors and positioned the project for future modernization. The work was delivered as a single, auditable commit, reflecting a targeted and maintainable approach to build system improvements.