gnome-panel: remove absolute path in desktop entry

Signed-off-by: Sefa Eyeoglu <contact@scrumplex.net>

pkgs/by-name/gn/gnome-panel/package.nix

@@ -45,16 +45,6 @@ stdenv.mkDerivation (finalAttrs: {
     ./modulesdir-env-var.patch
   ];
 
-  # make .desktop Exec absolute
-  postPatch = ''
-    patch -p0 <<END_PATCH
-    +++ gnome-panel/gnome-panel.desktop.in
-    @@ -7 +7 @@
-    -Exec=gnome-panel
-    +Exec=$out/bin/gnome-panel
-    END_PATCH
-  '';
-
   preFixup = ''
     gappsWrapperArgs+=(
       --prefix XDG_DATA_DIRS : "${gnome-menus}/share"

pkgs/by-name/gn/gnome-panel/wrapper.nix

@@ -54,9 +54,8 @@ stdenv.mkDerivation {
 
     rm $out/share/applications/gnome-panel.desktop
 
-    substitute ${gnome-panel}/share/applications/gnome-panel.desktop \
-      $out/share/applications/gnome-panel.desktop --replace \
-      "Exec=${gnome-panel}/bin/gnome-panel" "Exec=$out/bin/gnome-panel"
+    ln -s ${gnome-panel}/share/applications/gnome-panel.desktop \
+      $out/share/applications/gnome-panel.desktop
 
     runHook postInstall
   '';