diff --git a/pkgs/top-level/release-small.nix b/pkgs/top-level/release-small.nix
index a2a10ab7561..516141fa003 100644
--- a/pkgs/top-level/release-small.nix
+++ b/pkgs/top-level/release-small.nix
@@ -2,11 +2,10 @@
    the load on Hydra when testing the `stdenv-updates' branch. */
 
 { nixpkgs ? { outPath = (import ./all-packages.nix {}).lib.cleanSource ../..; revCount = 1234; shortRev = "abcdef"; }
+, supportedSystems ? [ "x86_64-linux" "i686-linux" "x86_64-darwin" "x86_64-freebsd" "i686-freebsd" ]
 }:
 
-with import ./release-lib.nix {
-  supportedSystems = [ "x86_64-linux" "i686-linux" "x86_64-darwin" "x86_64-freebsd" "i686-freebsd" ];
-};
+with import ./release-lib.nix { inherit supportedSystems; };
 
 {