diff --git a/tools/build/options/WITHOUT_ZFS b/tools/build/options/WITHOUT_ZFS
--- a/tools/build/options/WITHOUT_ZFS
+++ b/tools/build/options/WITHOUT_ZFS
@@ -1,2 +1,9 @@
 .\" $FreeBSD$
-Do not build ZFS file system kernel module, libraries, and user commands.
+Do not build the ZFS file system kernel module, libraries such as
+.Xr libbe 3 ,
+and user commands such as
+.Xr zpool 8
+or
+.Xr zfs 8 .
+Also disable ZFS support in utilities and libraries which implement
+ZFS-specific functionality.