SSH_AUTH_SOCK went missing from the session

SSH_AUTH_SOCK is not set anymore in gnomeos, likely ever since we switched from gnome-keyring ssh-agent to gcr's.

gcr-ssh-agent.service is enabled and running and if you set the variable manually (export SSH_AUTH_SOCK=$XDG_RUNTIME_DIR/gcr/ssh) the ssh-agent picks it up, but by default it's unset.

The service also sets the variable as expected so not sure what's wrong.

$ cat /usr/lib/systemd/user/gcr-ssh-agent.service 
[Unit]
Description=GCR ssh-agent wrapper

Requires=gcr-ssh-agent.socket

[Service]
Type=simple
StandardError=journal
Environment=SSH_AUTH_SOCK=%t/gcr/ssh
ExecStart=/usr/libexec/gcr-ssh-agent --base-dir %t/gcr
Restart=on-failure

[Install]
Also=gcr-ssh-agent.socket
WantedBy=default.target

$ echo $SSH_AUTH_SOCK