$ opam2rpm camlzip        
tar: This does not look like a tar archive
tar: Skipping to next header
tar: Exiting with failure status due to previous errors
Traceback (most recent call last):
  File "/home/michel/src/fedora/pagure/opam2rpm/.venv/bin/opam2rpm", line 33, in <module>
    sys.exit(load_entry_point('opam2rpm==1', 'console_scripts', 'opam2rpm')())
  File "/home/michel/src/fedora/pagure/opam2rpm/.venv/lib64/python3.9/site-packages/opam2rpm-1-py3.9.egg/opam2rpm/__main__.py", line 291, in main
    dirname = unpack(download(url))
  File "/home/michel/src/fedora/pagure/opam2rpm/.venv/lib64/python3.9/site-packages/opam2rpm-1-py3.9.egg/opam2rpm/__main__.py", line 184, in unpack
    subprocess.run(['tar', '-xf', filename, '-C', parent], check=True)
  File "/usr/lib64/python3.9/subprocess.py", line 528, in run
    raise CalledProcessError(retcode, process.args,
subprocess.CalledProcessError: Command '['tar', '-xf', '/home/michel/.cache/opam2rpm/src/camlzip-rel110.zip', '-C', '/home/michel/.cache/opam2rpm/src']' returned non-zero exit status 2.