Migrate from autofs to systemd automount

modules/gui.nix

@@ -88,18 +88,34 @@ in {
   };
 
   # Automount external storage
-  services.autofs = {
-    enable = true;
-    timeout = 5;
-    autoMaster = let
-      mapConf = pkgs.writeText "auto" ''
-        usb  -fstype=auto      :/dev/sdb1
-        sdcard  -fstype=auto   :/dev/mmcblk0p1
-      '';
-    in ''
-      /media file:${mapConf} --timeout=5
-    '';
-  };
+  systemd.mounts = [
+    # USB
+    {
+      what = "/dev/sdb1";
+      where = "/usb";
+      mountConfig = { TimeoutSec = "5"; };
+    }
+    # SD card
+    {
+      what = "/dev/mmcblk0p1";
+      where = "/sdcard";
+      mountConfig = { TimeoutSec = "5"; };
+    }
+  ];
+  systemd.automounts = [
+    # USB
+    {
+      where = "/usb";
+      automountConfig = { TimeoutIdleSec = "5"; };
+      wantedBy = [ "default.target" ];
+    }
+    # SD card
+    {
+      where = "/sdcard";
+      automountConfig = { TimeoutIdleSec = "5"; };
+      wantedBy = [ "default.target" ];
+    }
+  ];
 
   # Integrate pass with the browser
   programs.browserpass.enable = true;