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

[--:--:--][        ][    main:core activity                 ] START   Loading elements
[00:00:00][        ][    main:core activity                 ] SUCCESS Loading elements
[--:--:--][        ][    main:core activity                 ] START   Resolving elements
[00:00:00][        ][    main:core activity                 ] SUCCESS Resolving elements
[--:--:--][        ][    main:core activity                 ] START   Initializing remote caches
[00:00:00][        ][    main:core activity                 ] SUCCESS Initializing remote caches
[--:--:--][        ][    main:core activity                 ] START   Query cache
[00:00:00][        ][    main:core activity                 ] SUCCESS Query cache
[--:--:--][40b8cae0][    main:callHello.bst                 ] START   Staging dependencies
[00:00:00][40b8cae0][    main:callHello.bst                 ] SUCCESS Staging dependencies
[--:--:--][40b8cae0][    main:callHello.bst                 ] START   Integrating sandbox
[00:00:00][40b8cae0][    main:callHello.bst                 ] SUCCESS Integrating sandbox
[--:--:--][40b8cae0][    main:callHello.bst                 ] STATUS  Running command

    /bin/sh callHello.sh

Calling hello:
Hello World!
This is amhello 1.0.