macOS Big Sur で pyenv による Python のインストールに失敗する場合の対処法

$pyenv install 3.8.4
python-build: use openssl@1.1 from homebrew
python-build: use readline from homebrew
Downloading Python-3.8.4.tar.xz...
-> https://www.python.org/ftp/python/3.8.4/Python-3.8.4.tar.xz
Installing Python-3.8.4...
python-build: use readline from homebrew
python-build: use zlib from xcode sdk

BUILD FAILED (OS X 11.0.1 using python-build 20180424)

Inspect or clean up the working tree at /var/folders/yy/n5jbz6ds393fy32ljlyvkmkm0000gn/T/python-build.20201207233754.44082
Results logged to /var/folders/yy/n5jbz6ds393fy32ljlyvkmkm0000gn/T/python-build.20201207233754.44082.log

Last 10 log lines:
    mod_name, mod_spec, code = _get_module_details(mod_name)
  File "/private/var/folders/yy/n5jbz6ds393fy32ljlyvkmkm0000gn/T/python-build.20201207233754.44082/Python-3.8.4/Lib/runpy.py", line 144, in _get_module_details
    return _get_module_details(pkg_main_name, error)
  File "/private/var/folders/yy/n5jbz6ds393fy32ljlyvkmkm0000gn/T/python-build.20201207233754.44082/Python-3.8.4/Lib/runpy.py", line 111, in _get_module_details
    __import__(pkg_name)
  File "<frozen zipimport>", line 241, in load_module
  File "<frozen zipimport>", line 709, in _get_module_code
  File "<frozen zipimport>", line 570, in _get_data
zipimport.ZipImportError: can't decompress data; zlib not available
make: *** [install] Error 1