user@host:~/flatpak-autotools$ bst shell hello.bst -- hello

[--:--:--][][] START   Loading elements
[00:00:00][][] SUCCESS Loading elements
[--:--:--][][] START   Resolving elements
[00:00:00][][] SUCCESS Resolving elements
[--:--:--][][] START   Resolving cached state
[00:00:00][][] SUCCESS Resolving cached state
[--:--:--][848f838a][ main:hello.bst                     ] START   Staging dependencies
[00:00:01][848f838a][ main:hello.bst                     ] SUCCESS Staging dependencies
[--:--:--][848f838a][ main:hello.bst                     ] START   Integrating sandbox
[00:00:00][848f838a][ main:hello.bst                     ] SUCCESS Integrating sandbox
[--:--:--][848f838a][ main:hello.bst                     ] STATUS  Running command

    hello

Hello World!
This is amhello 1.0.