home/zsh: run tmux in systemd user instead of session scope

home/home_packages.nix

@@ -50,6 +50,7 @@
       neovide
       ngspice
       nix-init
+      nixpkgs-fmt
       nodePackages.peerflix
       openocd
       openscad

home/zsh.nix

@@ -101,7 +101,7 @@
 
       if [[ -n "$PS1" ]] && [[ -z "$TMUX" ]] && [[ -n "$SSH_CONNECTION" ]]; then
 	TMUX_EXE="${pkgs.tmux}/bin/tmux"
-        $TMUX_EXE attach-session -t $USER || $TMUX_EXE new-session -s $USER
+        systemd-run --scope --user $TMUX_EXE attach-session -t $USER || systemd-run --scope --user $TMUX_EXE new-session -s $USER
       fi
     '';
   };