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% sudo apt-key add winehq.key
gpg: can't connect to the agent: IPC connect call failed
% gpg --version
gpg (GnuPG) 2.2.8
libgcrypt 1.8.3
...
% ls -lt /etc/apt/winehq.key
-rw-r--r-- 1 root root 3.2K Dec 19 16:07 /etc/apt/winehq.key