diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 015ad74a934..5dd69afc523 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -9286,7 +9286,7 @@ with pkgs;
     else if name == "musl" then targetPackages.muslCross or muslCross
     else if name == "msvcrt" then targetPackages.windows.mingw_w64 or windows.mingw_w64
     else if targetPlatform.useiOSPrebuilt then targetPackages.darwin.iosSdkPkgs.libraries
-    else if name == "libSystem" then darwin.xcode
+    else if name == "libSystem" then targetPackages.darwin.xcode
     else throw "Unknown libc";
 
   libcCross = assert targetPlatform != buildPlatform; libcCrossChooser targetPlatform.libc;