unrecognised option '--ast'

[HosseinAsadi]

Hi after run this command solidity_flattener contracts/MyNFT.sol

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unrecognised option '--ast' Traceback (most recent call last): File "/usr/local/bin/solidity_flattener", line 4, in flattener.core.main() File "/usr/local/lib/python3.9/site-packages/flattener/core.py", line 97, in main solc_proc.check_returncode() File "/usr/local/Cellar/[email protected]/3.9.9/Frameworks/Python.framework/Versions/3.9/lib/python3.9/subprocess.py", line 460, in check_returncode raise CalledProcessError(self.returncode, self.args, self.stdout, subprocess.CalledProcessError: Command '['solc', '--ast', 'contracts/MyNFT.sol']' returned non-zero exit status 1.