diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -8,6 +8,7 @@ We expect minimal prep on your end. Please make sure that before execution the f
 
 - Arch Linux live CD ISO image sees exactly one partition with partition type code `BF00` ("Solaris root")
 - Arch Linux live CD ISO image sees exactly one partition with partition type code `EF00` ("EFI system partition")
+- The `EF00` EFI partition is mountable, in practical terms this usually only means it has a file system.
 - 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`.