diff --git a/pkgs/top-level/stage.nix b/pkgs/top-level/stage.nix
index 5b802aea07586..df929797f40a1 100644
--- a/pkgs/top-level/stage.nix
+++ b/pkgs/top-level/stage.nix
@@ -177,4 +177,6 @@ let
 
 in
   # Return the complete set of packages.
-  lib.fix toFix
+  # Note we use fix' instead of fix in order to perform an override
+  # of the package set from within.
+  lib.fix' toFix