diff --git a/pkgs/stdenv/linux/make-bootstrap-tools.nix b/pkgs/stdenv/linux/make-bootstrap-tools.nix
index 24dd543dc8b..ba2a953a457 100644
--- a/pkgs/stdenv/linux/make-bootstrap-tools.nix
+++ b/pkgs/stdenv/linux/make-bootstrap-tools.nix
@@ -77,6 +77,7 @@ rec {
       CLEAR
       CONFIG_STATIC y
       CONFIG_CPIO y
+      # (shlevy) Are these necessary?
       CONFIG_FEATURE_CPIO_O y
       CONFIG_FEATURE_CPIO_P y
     '';