-# sandbox and decide whether your userspace is 32- or 64-bit.
-Set("CONFIG_BOX_KERNEL_AMD64" => 1);
-#Set("CONFIG_BOX_USER_AMD64" => 1);
+# sandbox and decide whether your userspace is 32- or 64-bit. Both
+# variables can be set to "i386", "amd64", or "auto" to auto-detect.
+Set("CONFIG_BOX_KERNEL_ARCH" => "auto");
+Set("CONFIG_BOX_USER_ARCH" => "auto");