diff --git a/README.md b/README.md
index 231ced9..7a3dc98 100644
--- a/README.md
+++ b/README.md
@@ -44,10 +44,15 @@ zpool/root/archlinux
 ```
 If exactly one source returns that is the exact name of a ZFS dataset in an imported zpool we create a snapshot on it. If no source returns we silently exit. If more than one source returns we raise an error and halt the `pacman` transaction.
 
-We retain two different snapshot chains, one for `pacman` transactions that only affect what we are calling _trivial_ packages and a separate chain for _important_ packages. By default only the exact regular expression package name match `^(linux|systemd|zfs-(dkms|utils))$` is considered important so in plain English any one of:
+We retain two different snapshot chains, one for `pacman` transactions that only affect what we are calling _trivial_ packages and a separate chain for _important_ packages. By default only the exact regular expression package name match `^(linux(-zen)?(-headers)?|systemd|zfs-(linux(-zen)?|dkms|utils))$` is considered important so in plain English any one of:
 
 - `linux`
+- `linux-headers`
+- `linux-zen`
+- `linux-zen-headers`
 - `systemd`
+- `zfs-linux`
+- `zfs-linux-zen`
 - `zfs-dkms`
 - `zfs-utils`