def METHOD_NAME(self):
    # We need to run <build_dir>/unix/prebuild.sh
    # and it must be run from within the directory containing it
    unix_dir = join_path(self.build_directory, "unix")
    prebuild_path = join_path(unix_dir, "prebuild.sh")
    prebuild_script = which(prebuild_path)
    prebuild_script()