Running nixpkgs-update (https://nix-community.org/update-bot/) with UPDATE_INFO: ferdium 0 -> 1
attrpath: ferdium
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] these 2 derivations will be built:
  /nix/store/36y18q9bxpap9mnzsp9ig9rr9xrj6gch-update-ferdium.drv
  /nix/store/a3l4fsl38l4883mrczcdmv5106i7zlxk-packages.json.drv
building '/nix/store/36y18q9bxpap9mnzsp9ig9rr9xrj6gch-update-ferdium.drv'...
structuredAttrs is enabled
building '/nix/store/a3l4fsl38l4883mrczcdmv5106i7zlxk-packages.json.drv'...
structuredAttrs is enabled

Going to be running update for following packages:
 - ferdium-7.1.2

Press Enter key to continue...
Running update for:
Enqueuing group of 1 packages
 - ferdium-7.1.2: UPDATING ...
 - ferdium-7.1.2: DONE.

Packages updated!

Diff after rewrites:
diff --git a/pkgs/applications/networking/instant-messengers/ferdium/default.nix b/pkgs/applications/networking/instant-messengers/ferdium/default.nix
index 625d389b93e6..ae36c428908b 100644
--- a/pkgs/applications/networking/instant-messengers/ferdium/default.nix
+++ b/pkgs/applications/networking/instant-messengers/ferdium/default.nix
@@ -24,15 +24,15 @@ let
 
   hash =
     {
-      x86_64-linux = "sha256-ODQKFjBa2riJY26aPaAfLzuCyLYkB5oYSxIE28nMmwY=";
-      aarch64-linux = "sha256-CYHoTw6JUyU63iTd9tAbfWVnb48WcZgGtjthqnlAD8I=";
+      x86_64-linux = "sha256-+KP107a8Tmr2qR8pH+gHuXqEqiC5ExPGXoYOqV1Urbo=";
+      aarch64-linux = "sha256-6XnuSqHOJxAURTGWfi4QUBv4ictLmjeJAoyrPg+o+Bg=";
     }
     .${system} or throwSystem;
 in
 mkFranzDerivation rec {
   pname = "ferdium";
   name = "Ferdium";
-  version = "7.1.2";
+  version = "7.2.3";
   src = fetchurl {
     url = "https://github.com/ferdium/ferdium-app/releases/download/v${version}/Ferdium-linux-${version}-${arch}.deb";
     inherit hash;

No auto update branch exists
Old version 7.1.2" not present in master derivation file with contents: {
  lib,
  mkFranzDerivation,
  fetchurl,
  libxshmfence,
  stdenv,
  writeShellScript,
  nix-update,
  jq,
  nix,
  common-updater-scripts,
}:

let
  inherit (stdenv.hostPlatform) system;
  throwSystem = throw "ferdium: arch ${system} not supported";

  arch =
    {
      x86_64-linux = "amd64";
      aarch64-linux = "arm64";
    }
    .${system} or throwSystem;

  hash =
    {
      x86_64-linux = "sha256-+KP107a8Tmr2qR8pH+gHuXqEqiC5ExPGXoYOqV1Urbo=";
      aarch64-linux = "sha256-6XnuSqHOJxAURTGWfi4QUBv4ictLmjeJAoyrPg+o+Bg=";
    }
    .${system} or throwSystem;
in
mkFranzDerivation rec {
  pname = "ferdium";
  name = "Ferdium";
  version = "7.2.3";
  src = fetchurl {
    url = "https://github.com/ferdium/ferdium-app/releases/download/v${version}/Ferdium-linux-${version}-${arch}.deb";
    inherit hash;
  };

  extraBuildInputs = [ libxshmfence ];

  passthru.updateScript = writeShellScript "update-ferdium" ''
    ${lib.getExe nix-update} ferdium --no-src --override-filename pkgs/applications/networking/instant-messengers/ferdium/default.nix
    latestVersion=$(nix eval --raw --file . ferdium.version)
    if [[ "$latestVersion" == "$UPDATE_NIX_OLD_VERSION" ]]; then
      exit 0
    fi
    for system in x86_64-linux aarch64-linux; do
      hash=$(${lib.getExe nix} store prefetch-file --json \
        "$(nix eval --raw --file . ferdium.src.url --argstr system "$system")" \
        | ${lib.getExe jq} --raw-output .hash)
      ${lib.getExe' common-updater-scripts "update-source-version"} \
        ferdium "$latestVersion" "$hash" --system="$system" \
        --ignore-same-version --ignore-same-hash
    done
  '';

  meta = {
    description = "All your services in one place built by the community";
    homepage = "https://ferdium.org/";
    license = lib.licenses.asl20;
    maintainers = with lib.maintainers; [ magnouvean ];
    platforms = [
      "x86_64-linux"
      "aarch64-linux"
    ];
    hydraPlatforms = [ ];
  };
}