How to use gnupg remotely on buster while also logged into the local GUI

Question

I have a Debian buster system where I am logged in to the local GUI and also logged in over ssh. I need to sign something with gnupg over ssh.
Unfortunately I get no prompt for a passphrase on my ssh session, I suspect the prompt is being shown graphically in the GUI, but since I'm not in front of the machine right now I can't check.
In the past I have achived this through killing the gpg agent and starting one manually, but that doesn't seem to work anymore. The agent tells me it is already running. From some searching it seems that a systemd user service may be responsible for this.

plugwash · Answer

I was able to work around this issue by creating a symlink to my gnupg home directory with.
ln -s .gnupg .gnupg_

I was then able to start a gpg agent manually in the symlinked gnupg home with
GNUPGHOME=.gnupg_ gpg-agent --pinentry-program pinentry-curses --daemon bash

And within that session I was able to use gpg commands and succesfully get a passphrase prompt.

How to use gnupg remotely on buster while also logged into the local GUI

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