Running nixpkgs-update (https://nix-community.org/update-bot/) with UPDATE_INFO: ffsubsync 0.4.31 -> 0.5.1 https://github.com/smacke/ffsubsync/releases
attrpath: ffsubsync
Checking auto update branch...
[version] 
[version] skipping because derivation has updateScript
[rustCrateVersion] 
[rustCrateVersion] No cargoHash found
[golangModuleVersion] 
[golangModuleVersion] Not a buildGoModule package with vendorHash
[npmDepsVersion] 
[npmDepsVersion] No npmDepsHash
[updateScript] 
[updateScript] Success
[updateScript] this derivation will be built:
  /nix/store/1prsdq82khnq1jgn176by7dlybgc282i-packages.json.drv
building '/nix/store/1prsdq82khnq1jgn176by7dlybgc282i-packages.json.drv'...

Going to be running update for following packages:
 - ffsubsync-0.4.31

Press Enter key to continue...
Running update for:
Enqueuing group of 1 packages
 - ffsubsync-0.4.31: UPDATING ...
 - ffsubsync-0.4.31: DONE.

Packages updated!

Diff after rewrites:
diff --git a/pkgs/by-name/ff/ffsubsync/package.nix b/pkgs/by-name/ff/ffsubsync/package.nix
index d68121e4b43a..f6ae580e7772 100644
--- a/pkgs/by-name/ff/ffsubsync/package.nix
+++ b/pkgs/by-name/ff/ffsubsync/package.nix
@@ -7,14 +7,14 @@
 
 python3.pkgs.buildPythonApplication (finalAttrs: {
   pname = "ffsubsync";
-  version = "0.4.31";
+  version = "0.5.1";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "smacke";
     repo = "ffsubsync";
     tag = finalAttrs.version;
-    hash = "sha256-j9E4h2de2EOtYpuxKFbPOxZ5FBRO0EkbZhJdx5RiPn8=";
+    hash = "sha256-n9bYQgbBHGRJl79EiK7pTMDCcbI4ALudZUNc2SU0Wgg=";
   };
 
   build-system = with python3.pkgs; [ setuptools ];

No auto update branch exists
There might already be an open PR for this update:
- ffsubsync: 0.4.31 -> 0.5.1
  URL "https://api.github.com/repos/NixOS/nixpkgs/issues/545486"