diff --git a/pkgs/top-level/default.nix b/pkgs/top-level/default.nix
index 904ef8d39796..dfa68ba31b84 100644
--- a/pkgs/top-level/default.nix
+++ b/pkgs/top-level/default.nix
@@ -38,6 +38,9 @@
   # environment. See below for the arguments given to that function, the type of
   # list it returns.
   stdenvStages ? import ../stdenv
+
+, # Ignore unexpected args.
+  ...
 } @ args:
 
 let # Rename the function arguments