class RbSys::CargoBuilder

def rename_cdylib_for_ruby_compatibility(dest_path)

Ruby expects the dylib to follow a file name convention for loading 
def rename_cdylib_for_ruby_compatibility(dest_path)
  new_path = final_extension_path(dest_path)
  FileUtils.cp(cargo_dylib_path(dest_path), new_path)
  new_path
end