the output behavior has changed between v1.7 and v1.8: - v1.7: The output is printed to `stdout`. And output is `"mev-boost v1.7"` the version part is same as tag - v1.8: The output is printed to `stderr`. And output is `"mev-boost v1.8.0\n"` the version part **is not** same as tag we rely the output to check current version in our script, please use same logic to output the version information thanks