[gentoo-user] bash scrip prompt after bootstrap

I'm using a scrip to log-in/boot strap the system over NFS

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#!/bin/sh

HOST=${0##*/}
HOST=${HOST#*-}
ROOT=/mnt/${HOST}
...
exec chroot '${ROOT}' /bin/bash -l
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When I'm presented with bash prompt, it is the same as the one I logged
IN from.  So to eliminate the confusion I would like to change (add to)
the bash prompt the "HOST' name I log-in to.

When I log-in I'm presented with: "syscon3 #"
I would like it to be: ROOT+HOST
eg.: syscon3-eden

-- 
Thelma