`pipenv sync`で ssl エラー

pipenv syncで環境構築を行おうとしたところ，ssl エラーが発生した．その解決策を未来の自分に向けて残しておく．

環境

MacBook Pro (M1, 2020)
macOS Sonoma 14.0
Python 3.10.11
pip 23.3.1
pipenv, version 2023.10.24

問題点

pipenv syncで環境を構築しようとしたところ，以下のエラーが発生した．

WARNING: pip is configured with locations that require TLS/SSL, however the ssl module in Python is not available.
WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError("Can't connect to HTTPS URL because the SSL module is not available.")': /simple/asgiref/
WARNING: Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError("Can't connect to HTTPS URL because the SSL module is not available.")': /simple/asgiref/
WARNING: Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError("Can't connect to HTTPS URL because the SSL module is not available.")': /simple/asgiref/
WARNING: Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError("Can't connect to HTTPS URL because the SSL module is not available.")': /simple/asgiref/
WARNING: Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError("Can't connect to HTTPS URL because the SSL module is not available.")': /simple/asgiref/
Could not fetch URL https://pypi.org/simple/asgiref/: There was a problem confirming the ssl certificate: HTTPSConnectionPool(host='pypi.org', port=443): Max retries exceeded with url: /simple/asgiref/ (Caused by SSLError("Can't connect to HTTPS URL because the SSL module is not available.")) - skipping
ERROR: Could not find a version that satisfies the requirement asgiref==3.5.2 (from versions: none)
ERROR: No matching distribution found for asgiref==3.5.2
WARNING: pip is configured with locations that require TLS/SSL, however the ssl module in Python is not available.
Could not fetch URL https://pypi.org/simple/pip/: There was a problem confirming the ssl certificate: HTTPSConnectionPool(host='pypi.org', port=443): Max retries exceeded with url: /simple/pip/ (Caused by SSLError("Can't connect to HTTPS URL because the SSL module is not available.")) - skipping

解決策

brewが使えるなら，以下のコマンドを実行する．

terminal

brew install openssl@1.1

今まではbrew install opensslでインストールしていたが，これで install されていたのはopenssl3だった．openssl@1.1が必要らしいので改めてインストールした．

これを行うとしっかりとpipenv syncが通るようになった．

参考