tmux: Configure system-wide

This is useful on systems that are only accessed as root (e.g.,
servers).

modules/default.nix

@@ -46,6 +46,7 @@
     ./secrets.nix
     ./ssh.nix
     ./syncthing.nix
+    ./tmux.nix
     ./tools.nix
     ./udev.nix
     ./unfree.nix

users/simon/modules/default.nix

@@ -22,7 +22,6 @@
     ./scripts
     ./sway
     ./tmate.nix
-    ./tmux.nix
     ./vdirsyncer.nix
     ./watson.nix
     ./xcompose.nix

users/simon/modules/tmate.nix

@@ -7,6 +7,6 @@
 
   home.file.".tmate.conf".text = ''
     set tmate-authorized-keys "~/.ssh/authorized_keys_tmate"
-    source-file ~/.tmux.conf
+    source-file /etc/tmux.conf
   '';
 }