jackett: apply patches only to the package as used by the service -- not all of nixpkgs

hosts/by-name/servo/services/default.nix

@@ -10,7 +10,7 @@
     ./gitea.nix
     ./goaccess.nix
     ./ipfs.nix
-    ./jackett.nix
+    ./jackett
     ./jellyfin.nix
     ./kiwix-serve.nix
     ./komga.nix

hosts/by-name/servo/services/jackett/default.nix

@@ -6,6 +6,15 @@
     { user = "root"; group = "root"; path = "/var/lib/jackett"; method = "bind"; }
   ];
   services.jackett.enable = true;
+  services.jackett.package = pkgs.jackett.overrideAttrs (upstream: {
+    # 2022-07-29: check phase segfaults on arm (with or without my patches)
+    doCheck = false;
+    patches = (upstream.patches or []) ++ [
+      # bind to an IP address which is usable behind a netns.
+      # jackett doesn't allow customization of the bind address: this will probably always be here.
+      ./01-fix-bind-host.patch
+    ];
+  });
 
   systemd.services.jackett.after = [ "wireguard-wg-ovpns.service" ];
   systemd.services.jackett.partOf = [ "wireguard-wg-ovpns.service" ];

pkgs/default.nix

@@ -167,9 +167,6 @@ let
 
     # ibus = callPackage ./patched/ibus { inherit (unpatched) ibus; };
 
-    # jackett doesn't allow customization of the bind address: this will probably always be here.
-    jackett = callPackage ./patched/jackett { inherit (unpatched) jackett; };
-
     # modemmanager = callPackage ./patched/modemmanager { inherit (unpatched) modemmanager; };
 
     playerctl = unpatched.playerctl.overrideAttrs (upstream: {

pkgs/patched/jackett/default.nix

@@ -1,11 +0,0 @@
-{ jackett }:
-
-(jackett.overrideAttrs (upstream: {
-  # 2022-07-29: check phase segfaults on arm (with or without my patches)
-  doCheck = false;
-  patches = (upstream.patches or []) ++ [
-    # bind to an IP address which is usable behind a netns
-    ./01-fix-bind-host.patch
-  ];
-}))
-