`grub-btrfs` configuration

In `/etc/default/grub-btrfs/config`, the `GRUB_BTRFS_GRUB_DIRNAME` parameter need to be set to the folder containing the generated `grub.cfg` which will depend on the mount point of the ESP partition par default (so `"/efi/grub"` by default). In theory, `GRUB_BTRFS_ENABLE_CRYPTODISK` should also be set to `"true"` if the root partition is encrypted. Unfortunately it doesn't work on my config, with both the default version and the `grub-btrfs-git` from the AUR, but I believe the issue is with `grub-btrfs` not your tool. I need to investigate this point.