First attempt

zfs.install

@@ -0,0 +1,8 @@
+post_remove() {
+    MK_CONF=$(grep -v '#' /etc/mkinitcpio.conf | grep zfs >/dev/null; echo $?);
+    if [[ ${MK_CONF} == '0' && $1 == 'remove' ]]; then
+        echo '>>> The ZFS packages have been removed, but "zfs" remains in the "hooks"'
+        echo '>>> list in mkinitcpio.conf! You will need to remove "zfs" from the '
+        echo '>>> "hooks" list and then regenerate the initial ramdisk.'
+    fi
+}