rebuild script now has a -U flag for updating the flake before rebuilding

modules/home/environment/fern/env.nix

@@ -13,6 +13,8 @@
 
       FZF_DEFAULT_COMMAND = "fd";
       FZF_DEFAULT_OPTS = "--height 40% --layout=reverse --border";
+
+      LESS = "-R"; # pager uses alt buffer
     };
   };
 }