Refactor the darktable thing

hosts/modules/home.nix

@@ -20,11 +20,18 @@
     signal-desktop
     spotify
 
-    (darktable.overrideAttrs (oldAttrs: {
-      nativeBuildInputs = (oldAttrs.nativeBuildInputs or []) ++ [ makeWrapper ];
-      postInstall = (oldAttrs.postInstall or "") + ''
-        wrapProgram $out/bin/darktable --set GDK_BACKEND wayland
-      '';
-    }))
+    (symlinkJoin {
+     name = "darktable";
+     paths = [ darktable ];
+     nativeBuildInputs = [ makeWrapper ];
+     postBuild = ''
+     # Remove the symlink to the original binary
+     rm $out/bin/darktable
+
+     # Create a wrapper that points to the cached original
+     makeWrapper ${darktable}/bin/darktable $out/bin/darktable \
+     --set GDK_BACKEND wayland
+     '';
+     })
   ];
 }