diff --git a/hosts/radiobert/base.nix b/hosts/radiobert/base.nix
index 23d4ab8d..03bb350a 100644
--- a/hosts/radiobert/base.nix
+++ b/hosts/radiobert/base.nix
@@ -31,6 +31,7 @@
         version = 4;
         # TODO: this machine actually has u-boot setup but that's no
         # longer working with nixos-22.05. DO NOT REBOOT! :-)
+        # https://github.com/NixOS/nixpkgs/pull/112677
         # uboot.enable = true;
         firmwareConfig = ''
           gpu_mem=192