nix: set x-systemd options directly

NixOS generates two x-systemd.requires-mounts-for options for some reason, and there seems to be no knob for configuring ordering.

Signed-off-by: Ophestra <cat@gensokyo.uk>

nixos.nix

@@ -25,12 +25,15 @@ let
   getsubname = userid: appid: "u${toString userid}_a${toString appid}";
   getsubhome = userid: appid: "${cfg.stateDir}/u${toString userid}/a${toString appid}";
 
-  mountpoints = {
+  mountpoints =
+    let
+      after = "sys-module-fuse.device";
+      before = "nix-daemon.socket";
+    in
+    {
       ${cfg.sharefs.name} = mkIf (cfg.sharefs.source != null) {
-      depends = [ cfg.sharefs.source ];
         device = "sharefs";
         fsType = "fuse.sharefs";
-      noCheck = true;
         options = [
           "rw"
           "noexec"
@@ -42,6 +45,11 @@ let
           "source=${cfg.sharefs.source}"
           "setuid=${toString config.users.users.${cfg.sharefs.user}.uid}"
           "setgid=${toString config.users.groups.${cfg.sharefs.group}.gid}"
+
+          "x-systemd.requires=${after}"
+          "x-systemd.before=${before}"
+          "x-systemd.required-by=${before}"
+          "x-systemd.requires-mounts-for=${cfg.sharefs.source}"
         ];
       };
     };