overlays/channel-packages: sherlock-launcher fix

Until NixOS/nixpkgs#431274 is merged

Author: khaneliman

overlays/channel-packages/default.nix

@@ -19,6 +19,12 @@ in
     # TODO: remove once makes it to unstable
     ;
 
+  sherlock-launcher = master.sherlock-launcher.overrideAttrs (oldAttrs: {
+    nativeBuildInputs = oldAttrs.nativeBuildInputs ++ [
+      final.wrapGAppsHook4
+    ];
+  });
+
   # From nixpkgs-unstable
   inherit (unstable)
     # Misc