diff --git a/pkgs/by-name/gp/gpclient/package.nix b/pkgs/by-name/gp/gpclient/package.nix
index bdd6c40375ac..c29407821041 100644
--- a/pkgs/by-name/gp/gpclient/package.nix
+++ b/pkgs/by-name/gp/gpclient/package.nix
@@ -26,6 +26,9 @@
 rustPlatform.buildRustPackage {
   pname = "gpclient";
 
+  # Keep automatic updates anchored on gpauth so the bot updates both
+  # package outputs in one PR.
+  # nixpkgs-update: no auto update
   inherit (gpauth)
     cargoHash
     meta