    user@host:~/directives$ bst --option flavor excited build hello.bst

    [--:--:--][        ][    main:core activity                 ] START   Build
    [--:--:--][        ][    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   Resolving cached state
    [00:00:00][        ][    main:core activity                 ] SUCCESS Resolving cached state
    [--:--:--][        ][    main:core activity                 ] START   Checking sources
    [00:00:00][        ][    main:core activity                 ] SUCCESS Checking sources

    BuildStream Version 1.93.1+172.g03ccfcd3b
      Session Start: Friday, 17-04-2020 at 20:52:32
      Project:       directives (/home/user/directives)
      Targets:       hello.bst

    User Configuration
      Configuration File:      /home/user/.config/buildstream.conf
      Cache Directory:         /home/user/.cache/buildstream
      Log Files:               /home/user/.cache/buildstream/logs
      Source Mirrors:          /home/user/.cache/buildstream/sources
      Build Area:              /home/user/.cache/buildstream/build
      Strict Build Plan:       Yes
      Maximum Fetch Tasks:     10
      Maximum Build Tasks:     4
      Maximum Push Tasks:      4
      Maximum Network Retries: 2

    Project Options
      flavor: excited

    Pipeline
          cached 179c6ae937e8e2ece3192ab8dc2a55053134a591c9ccd37507b56d11885fae23 base/alpine.bst
          cached c556a766f75b4d44070ae7eb39b344142736f5505b535299a6d4f5f1376de8eb base.bst
       buildable 3d93bafadd3d0b00d16a558c46af4c7b3ca8d81ddcd0d0a184faee2c876ca12c hello.bst
    ===============================================================================
    [--:--:--][3d93bafa][   build:hello.bst                     ] START   directives/hello/3d93bafa-build.32121.log
    [--:--:--][3d93bafa][   build:hello.bst                     ] START   Staging dependencies
    [00:00:00][3d93bafa][   build:hello.bst                     ] SUCCESS Staging dependencies
    [--:--:--][3d93bafa][   build:hello.bst                     ] START   Integrating sandbox
    [00:00:00][3d93bafa][   build:hello.bst                     ] SUCCESS Integrating sandbox
    [--:--:--][3d93bafa][   build:hello.bst                     ] START   Staging sources
    [00:00:00][3d93bafa][   build:hello.bst                     ] SUCCESS Staging sources
    [--:--:--][3d93bafa][   build:hello.bst                     ] START   Running build-commands
    [--:--:--][3d93bafa][   build:hello.bst                     ] STATUS  Running command

        make PREFIX="/usr" GREETING="Howdy there, and what a world it is !"

    [00:00:00][3d93bafa][   build:hello.bst                     ] SUCCESS Running build-commands
    [--:--:--][3d93bafa][   build:hello.bst                     ] START   Running install-commands
    [--:--:--][3d93bafa][   build:hello.bst                     ] STATUS  Running command

        make -j1 PREFIX="/usr" DESTDIR="/buildstream-install" install

    [00:00:00][3d93bafa][   build:hello.bst                     ] SUCCESS Running install-commands
    [--:--:--][3d93bafa][   build:hello.bst                     ] START   Running strip-commands
    [00:00:00][3d93bafa][   build:hello.bst                     ] SUCCESS Running strip-commands
    [--:--:--][3d93bafa][   build:hello.bst                     ] START   Caching artifact
    [00:00:00][3d93bafa][   build:hello.bst                     ] SUCCESS Caching artifact
    [00:00:00][3d93bafa][   build:hello.bst                     ] SUCCESS directives/hello/3d93bafa-build.32121.log
    [00:00:00][        ][    main:core activity                 ] SUCCESS Build

    Pipeline Summary
      Total:       3
      Session:     1
      Fetch Queue: processed 0, skipped 1, failed 0
      Build Queue: processed 1, skipped 0, failed 0