{
    pkgs,
    ...
}: {
    systemd.user.services.ssh-agent = {
        enable = true;
        description = "SSH key agent";
        serviceConfig = {
            Type = "simple";
            ExecStart = "${pkgs.openssh}/bin/ssh-agent -D -a $SSH_AUTH_SOCK";
        };
        environment = {
            SSH_AUTH_SOCK = "%t/ssh-agent.socket";
            DISPLAY = ":0";
        };
        wantedBy = [ "default.target" ];
    };

    environment.sessionVariables = {
        SSH_AUTH_SOCK = "\$XDG_RUNTIME_DIR/ssh-agent.socket";
    };
}