gallery-dl: refactor

this shouldn't create any rebuilds

pkgs/by-name/ga/gallery-dl/package.nix

@@ -6,18 +6,15 @@
   python3Packages,
 }:
 
-let
+python3Packages.buildPythonApplication (finalAttrs: {
   pname = "gallery-dl";
   version = "1.31.5";
-in
-python3Packages.buildPythonApplication {
-  inherit pname version;
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "mikf";
     repo = "gallery-dl";
-    tag = "v${version}";
+    tag = "v${finalAttrs.version}";
     hash = "sha256-jrTLiZs3LJaFZL40vxWS/1J9HHke9gmV9840AOUtLCU=";
   };
 
@@ -50,7 +47,7 @@ python3Packages.buildPythonApplication {
   passthru.updateScript = nix-update-script { };
 
   meta = {
-    changelog = "https://github.com/mikf/gallery-dl/blob/v${version}/CHANGELOG.md";
+    changelog = "https://github.com/mikf/gallery-dl/blob/v${finalAttrs.version}/CHANGELOG.md";
     description = "Command-line program to download image-galleries and -collections from several image hosting sites";
     homepage = "https://github.com/mikf/gallery-dl";
     license = lib.licenses.gpl2Only;
@@ -61,4 +58,4 @@ python3Packages.buildPythonApplication {
       lucasew
     ];
   };
-}
+})