Worked on improving build system reliability in the llvm/circt repository by addressing a CMake module copy issue affecting external and out-of-tree builds. The solution involved implementing a robust file(COPY ...) step within the CMake configuration, ensuring that API module files from the cmake/modules directory are consistently copied to the build directory. This change enhanced integration for downstream consumers and improved reproducibility for continuous integration workflows. The work focused on build system configuration and CMake scripting, with careful validation to ensure compatibility for external users. No new features were added during this period, but the bug fix improved overall build stability.