diff --git a/README.md b/README.md
index 6a3d969..2ac54fc 100644
--- a/README.md
+++ b/README.md
@@ -4,9 +4,15 @@ Helper script to install Arch Linux with ZFSBootMenu from within a running Arch
 
 # Prep
 
-The script expects minimal prep on your end. Please make sure that before execution at least one of the following conditions are met.
+The script expects minimal prep on your end. Please make sure that before execution the following conditions are met.
 
-- Your machine has exactly one partition with partition type code `BF00` ("Solaris root")
+- Arch live CD ISO image sees exactly one partition with partition type code `BF00` ("Solaris root")
+- Arch live CD ISO image sees exactly one partition with partition type code `EF00` ("EFI system partition")
+- No ZFS zpool exists
+
+The script will create a single ZFS zpool `zpool` on the `BF00` partition with dataset child `zpool/root` which itself has one child `zpool/root/archlinux`, that's where Arch Linux gets installed. Parallel to `zpool/root` it'll create `zpool/data` with a `zpool/data/home` child dataset that gets mounted at `/home`.
+
+The script will use the `EF00` partition to install a ZFSBootMenu EFI executable if - and only if - `efibootmgr` says that no such `ZFSBootMenu` entry exists. If ZFSBootMenu gets added to the EFI partition it'll become primary boot option.
 
 # How to run this?
 
@@ -17,6 +23,7 @@ The script expects minimal prep on your end. Please make sure that before execut
     curl -s "${SCRIPT_URL}" | bash
     ```
     The script will call itself when it changes into its `chroot`, that's why we `export SCRIPT_URL`. Feel free to update `"${SCRIPT_URL}"` with whatever branch or revision you want to use from [quico.space/quico-os-setup/arch-zbm](https://quico.space/quico-os-setup/arch-zbm). Typically `.../branch/main/setup.sh` as shown above is what you want.
+
 # Steps
 
 The scripts takes the following installation steps.