diff --git a/pkgs/stdenv/adapters.nix b/pkgs/stdenv/adapters.nix
index f5fbbcc22805..3e66de48b4df 100644
--- a/pkgs/stdenv/adapters.nix
+++ b/pkgs/stdenv/adapters.nix
@@ -100,7 +100,7 @@ rec {
       NIX_CFLAGS_LINK = toString (finalAttrs.NIX_CFLAGS_LINK or "")
         + lib.optionalString (stdenv.cc.isGNU or false) " -static-libgcc";
       nativeBuildInputs = (finalAttrs.nativeBuildInputs or [])
-        ++ lib.optional stdenv.hasCC [
+        ++ lib.optionals stdenv.hasCC [
           (pkgs.buildPackages.makeSetupHook {
             name = "darwin-portable-libSystem-hook";
             substitutions = {