Running nixpkgs-update (https://github.com/NixOS/infra/blob/main/non-critical-infra/modules/nixpkgs-update/README.md) with UPDATE_INFO: freedv 2.4.0 -> 2.4.1 https://github.com/freedv/freedv-gui/releases
attrpath: freedv
Checking auto update branch...
[version] 
[version] generic version rewriter does not support multiple hashes
[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/6b9a1qap6sdfngw91dw75x1cb6z51pm8-packages.json.drv
building '/nix/store/6b9a1qap6sdfngw91dw75x1cb6z51pm8-packages.json.drv'...
structuredAttrs is enabled

Going to be running update for following packages:
 - freedv-2.4.0

Press Enter key to continue...
Running update for:
Enqueuing group of 1 packages
 - freedv-2.4.0: UPDATING ...
 - freedv-2.4.0: DONE.

Packages updated!

Diff after rewrites:
diff --git a/pkgs/by-name/fr/freedv/package.nix b/pkgs/by-name/fr/freedv/package.nix
index dbc229c4024e..b9d137ceee14 100644
--- a/pkgs/by-name/fr/freedv/package.nix
+++ b/pkgs/by-name/fr/freedv/package.nix
@@ -79,13 +79,13 @@ let
 in
 stdenv.mkDerivation (finalAttrs: {
   pname = "freedv";
-  version = "2.4.0";
+  version = "2.4.1";
 
   src = fetchFromGitHub {
     owner = "freedv";
     repo = "freedv-gui";
     tag = "v${finalAttrs.version}";
-    hash = "sha256-Nd0oOGiMrERviaGOtdOQ0KTSSL/+69Q2bRHjojBUknU=";
+    hash = "sha256-bvAHyRJAEFYJzoDhtF5BqQbb3IZ7aruKnu29GLKqtwU=";
   };
 
   postPatch = ''

No auto update branch exists
Received ExitFailure 1 when running
Raw command: nix-build --option sandbox true --arg config "{ allowUnfree = true; allowAliases = false; }" --arg overlays "[ ]" -A freedv
nix build failed.
got build log for 'freedv' from 'daemon'
Running phase: unpackPhase
@nix { "action": "setPhase", "phase": "unpackPhase" }
unpacking source archive /nix/store/40l90sd3psxsdlz18b5wix94924pz4gg-source
source root is source
Running phase: patchPhase
@nix { "action": "setPhase", "phase": "patchPhase" }
substituteStream() in derivation freedv-2.4.1: ERROR: pattern GIT_REPOSITORY\ https://github.com/tmiw/freedv-backend doesn't match anything in file 'cmake/BuildFreeDVBackend.cmake'