localsend: fix autostart

pkgs/by-name/lo/localsend/package.nix

@@ -7,7 +7,6 @@
   makeDesktopItem,
   copyDesktopItems,
   nixosTests,
-  pkg-config,
   libayatana-appindicator,
   undmg,
   makeBinaryWrapper,
@@ -36,6 +35,11 @@ let
       pasteboard = "sha256-lJA5OWoAHfxORqWMglKzhsL1IFr9YcdAQP/NVOLYB4o=";
     };
 
+    postPatch = ''
+      substituteInPlace lib/util/native/autostart_helper.dart \
+        --replace-fail 'Exec=''${Platform.resolvedExecutable}' "Exec=localsend_app"
+    '';
+
     nativeBuildInputs = [
       copyDesktopItems
     ];