To trigger a complete rebuild, run make clean. This will remove all local build artifacts. for all platforms. To selectively delete just the build artifacts for a particular platform, delete the respective folder in the build directory.
If you have [[installed ccache|Workflow → ccache]], and if you suspect that it cached a bad artifact, run ccache --cleanup to clear the cache.
If you are having trouble getting the dependencies right, you can delete the mason_packages directory, or run make distclean. This means the Makefile and [[CMake|Workflow → CMake]] will automatically install the dependencies again on the next try.