diff --git a/haskell-overlays/reflex-packages/default.nix b/haskell-overlays/reflex-packages/default.nix
index 218576631..62a00a0a9 100644
--- a/haskell-overlays/reflex-packages/default.nix
+++ b/haskell-overlays/reflex-packages/default.nix
@@ -20,7 +20,7 @@ let
 
   inherit (nixpkgs) stdenv;
   # Older chromium for reflex-dom-core test suite
-  nixpkgs_oldChromium = import ../../nixpkgs-old-chromium {};
+  nixpkgs_oldChromium = import ../../nixpkgs-old-chromium { inherit (nixpkgs.stdenv.buildPlatform) system; };
 in
 {
   _dep = super._dep or {} // thunkSet ./dep;