user@host:~/directives$ bst --option flavor somber 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 20:52:31
  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: somber

Pipeline
      cached 179c6ae937e8e2ece3192ab8dc2a55053134a591c9ccd37507b56d11885fae23 base/alpine.bst 
      cached c556a766f75b4d44070ae7eb39b344142736f5505b535299a6d4f5f1376de8eb base.bst 
   buildable 028e738455de72766973477172442f4c6d89eaff445894e69a29ed7d850cfb15 hello.bst 
===============================================================================
[--:--:--][028e7384][   build:hello.bst                     ] START   directives/hello/028e7384-build.32072.log
[--:--:--][028e7384][   build:hello.bst                     ] START   Staging dependencies
[00:00:00][028e7384][   build:hello.bst                     ] SUCCESS Staging dependencies
[--:--:--][028e7384][   build:hello.bst                     ] START   Integrating sandbox
[00:00:00][028e7384][   build:hello.bst                     ] SUCCESS Integrating sandbox
[--:--:--][028e7384][   build:hello.bst                     ] START   Staging sources
[00:00:00][028e7384][   build:hello.bst                     ] SUCCESS Staging sources
[--:--:--][028e7384][   build:hello.bst                     ] START   Running build-commands
[--:--:--][028e7384][   build:hello.bst                     ] STATUS  Running command

    make PREFIX="/usr" GREETING="Hey world."

[00:00:00][028e7384][   build:hello.bst                     ] SUCCESS Running build-commands
[--:--:--][028e7384][   build:hello.bst                     ] START   Running install-commands
[--:--:--][028e7384][   build:hello.bst                     ] STATUS  Running command

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

[00:00:00][028e7384][   build:hello.bst                     ] SUCCESS Running install-commands
[--:--:--][028e7384][   build:hello.bst                     ] START   Running strip-commands
[00:00:00][028e7384][   build:hello.bst                     ] SUCCESS Running strip-commands
[--:--:--][028e7384][   build:hello.bst                     ] START   Caching artifact
[00:00:00][028e7384][   build:hello.bst                     ] SUCCESS Caching artifact
[00:00:00][028e7384][   build:hello.bst                     ] SUCCESS directives/hello/028e7384-build.32072.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