Running nixpkgs-update (https://nix-community.org/update-bot/) with UPDATE_INFO: frei0r 2.5.1 -> 2.5.6 https://github.com/dyne/frei0r/releases
attrpath: frei0r
Checking auto update branch...
No auto update branch exists
[version] 
[version] updated version and sha256
[rustCrateVersion] 
[rustCrateVersion] No cargoHash found
[golangModuleVersion] 
[golangModuleVersion] Not a buildGoModule package with vendorHash
[npmDepsVersion] 
[npmDepsVersion] No npmDepsHash
[updateScript] 
[updateScript] skipping because derivation has no updateScript
Diff after rewrites:
diff --git a/pkgs/by-name/fr/frei0r/package.nix b/pkgs/by-name/fr/frei0r/package.nix
index 586010b65ecd..53326a6cbc08 100644
--- a/pkgs/by-name/fr/frei0r/package.nix
+++ b/pkgs/by-name/fr/frei0r/package.nix
@@ -13,13 +13,13 @@
 
 stdenv.mkDerivation (finalAttrs: {
   pname = "frei0r-plugins";
-  version = "2.5.1";
+  version = "2.5.6";
 
   src = fetchFromGitHub {
     owner = "dyne";
     repo = "frei0r";
     rev = "v${finalAttrs.version}";
-    hash = "sha256-3gUWvO5izOrJt+XwcNBNiLfu+iMqo4nuPbx++TYzao0=";
+    hash = "sha256-EUFNPAAdsa96mYiCoLbD7v5PweU4atCsKh345zTDGo0=";
   };
 
   nativeBuildInputs = [

Received ExitFailure 1 when running
Raw command: nix-build --option sandbox true --arg config "{ allowUnfree = true; allowAliases = false; }" --arg overlays "[ ]" -A frei0r
nix build failed.
Package expat was not found in the pkg-config search path.
Perhaps you should add the directory containing `expat.pc'
to the PKG_CONFIG_PATH environment variable
Package 'expat', required by 'fontconfig', not found
Package expat was not found in the pkg-config search path.
Perhaps you should add the directory containing `expat.pc'
to the PKG_CONFIG_PATH environment variable
Package 'expat', required by 'fontconfig', not found
Package expat was not found in the pkg-config search path.
Perhaps you should add the directory containing `expat.pc'
to the PKG_CONFIG_PATH environment variable
Package 'expat', required by 'fontconfig', not found
Package expat was not found in the pkg-config search path.
Perhaps you should add the directory containing `expat.pc'
to the PKG_CONFIG_PATH environment variable
Package 'expat', required by 'fontconfig', not found
-- Found Cairo 
-- Checking for module 'gavl'
--   No package 'gavl' found
CMake Error at /nix/store/q800b7nrqa8csf2gcds2i83w1icsda5w-cmake-4.1.2/share/cmake-4.1/Modules/FindPkgConfig.cmake:639 (message):
  The following required packages were not found:

   - gavl

Call Stack (most recent call first):
  /nix/store/q800b7nrqa8csf2gcds2i83w1icsda5w-cmake-4.1.2/share/cmake-4.1/Modules/FindPkgConfig.cmake:867 (_pkg_check_modules_internal)
  CMakeLists.txt:25 (pkg_check_modules)


-- Configuring incomplete, errors occurred!