diff --git a/modules/virtualisation/virtualbox-image.nix b/modules/virtualisation/virtualbox-image.nix
index 306367d0ef52..e1b6def8edb3 100644
--- a/modules/virtualisation/virtualbox-image.nix
+++ b/modules/virtualisation/virtualbox-image.nix
@@ -48,7 +48,8 @@ with pkgs.lib;
 
           echo "filling Nix store..."
           mkdir -p /mnt/nix/store
-          cp -prd $storePaths /mnt/nix/store/
+          set -f
+          cp -prvd $storePaths /mnt/nix/store/
 
           # Register the paths in the Nix database.
           printRegistration=1 perl ${pkgs.pathsFromGraph} /tmp/xchg/closure | \