herdr: add custom dependency argument to nix-update-script

This should allow for auto updates of the custom zig dependencies when
nix-update-script is being run.

Author: arunoruto

pkgs/by-name/he/herdr/package.nix

@@ -70,7 +70,12 @@ rustPlatform.buildRustPackage (finalAttrs: {
   nativeInstallCheckInputs = [ versionCheckHook ];
   doInstallCheck = true;
 
-  passthru.updateScript = nix-update-script { };
+  passthru.updateScript = nix-update-script {
+    extraArgs = [
+      "--custom-dep"
+      "zigDeps"
+    ];
+  };
 
   meta = {
     description = "Agent multiplexer that lives in your terminal";