Running nixpkgs-update (https://nix-community.org/update-bot/) with UPDATE_INFO: fluxcd 2.9.3 -> 2.9.4 https://github.com/fluxcd/flux2/releases
attrpath: fluxcd
Checking auto update branch...
[version] 
[version] generic version rewriter does not support multiple hashes
[rustCrateVersion] 
[rustCrateVersion] No cargoHash found
[golangModuleVersion] 
[golangModuleVersion] skipping because derivation has updateScript
[npmDepsVersion] 
[npmDepsVersion] No npmDepsHash
[updateScript] 
[updateScript] Success
[updateScript] this derivation will be built:
  /nix/store/b3pwalpphm9figa99qhz6j16jsk90p6m-packages.json.drv
building '/nix/store/b3pwalpphm9figa99qhz6j16jsk90p6m-packages.json.drv'...

Going to be running update for following packages:
 - fluxcd-2.9.3

Press Enter key to continue...
Running update for:
Enqueuing group of 1 packages
 - fluxcd-2.9.3: UPDATING ...
 - fluxcd-2.9.3: DONE.

Packages updated!

Diff after rewrites:
diff --git a/pkgs/by-name/fl/fluxcd/package.nix b/pkgs/by-name/fl/fluxcd/package.nix
index 582c7e3529b5..4982c3c558b8 100644
--- a/pkgs/by-name/fl/fluxcd/package.nix
+++ b/pkgs/by-name/fl/fluxcd/package.nix
@@ -9,10 +9,10 @@
 }:
 
 let
-  version = "2.9.3";
-  srcHash = "sha256-xu+9Ks+Jrzxk+D2GUmw68/mprNf8ynQZiCmMNpVkR4M=";
-  vendorHash = "sha256-h5APVAwqyodfaoNq5SqHF/3Vu3O2XfdlZ9O/apA49pc=";
-  manifestsHash = "sha256-L1dSNLFKtAGS7A+vvz7t68YifOxWoFxPTmNB31iaGoo=";
+  version = "2.9.4";
+  srcHash = "sha256-7Suhsg1tWn6gzkPDQT4BII0hTCM3HCCZTTtFVNumA9A=";
+  vendorHash = "sha256-3CMj5MI5cILnyWoWkcBzD5X626nsQ6nfipeqN35IQEk=";
+  manifestsHash = "sha256-+187K4w//AxtSYcrA3NoVCSFpTkjNqZmfOlbdzD9YmI=";
 
   manifests = fetchzip {
     url = "https://github.com/fluxcd/flux2/releases/download/v${version}/manifests.tar.gz";

No auto update branch exists
There might already be an open PR for this update:
- fluxcd: 2.9.3 -> 2.9.4
  URL "https://api.github.com/repos/NixOS/nixpkgs/issues/552029"