diff --git a/pkgs/top-level/aliases.nix b/pkgs/top-level/aliases.nix
index e28d75c84211..69633ad76028 100644
--- a/pkgs/top-level/aliases.nix
+++ b/pkgs/top-level/aliases.nix
@@ -1246,4 +1246,6 @@ mapAliases ({
     targetLlvmLibraries = targetPackages.llvmPackages_git.libraries;
   });
 
+  inherit (stdenv.hostPlatform) system; # added 2021-10-22
+
 })
diff --git a/pkgs/top-level/stage.nix b/pkgs/top-level/stage.nix
index a990c5ed70cb..7db79276d899 100644
--- a/pkgs/top-level/stage.nix
+++ b/pkgs/top-level/stage.nix
@@ -116,7 +116,6 @@ let
     inherit (super.stdenv) buildPlatform hostPlatform targetPlatform;
   in {
     inherit buildPlatform hostPlatform targetPlatform;
-    inherit (hostPlatform) system;
   };
 
   splice = self: super: import ./splice.nix lib self (adjacentPackages != null);