user@host:~/junctions$ bst shell callHello.bst -- /bin/sh callHello.sh

[--:--:--][][] START   Loading pipeline
[00:00:00][][] SUCCESS Loading pipeline
[--:--:--][][] START   Resolving pipeline
[00:00:00][][] SUCCESS Resolving pipeline
[--:--:--][][] START   Resolving cached state
[00:00:00][][] SUCCESS Resolving cached state
[--:--:--][][] START   Staging dependencies
[00:00:00][][] SUCCESS Staging dependencies
[--:--:--][][] START   Integrating sandbox
[00:00:00][][] SUCCESS Integrating sandbox
[--:--:--][e366cac8][ main:callHello.bst                 ] STATUS  Running command

    /bin/sh callHello.sh

Calling hello:
Hello World!
This is amhello 1.0.