There are currently several warnings when building libsoy such as
warning: local variable `x' declared but never used. Fix these warnings either by removing a truely unused variable or make the variable's use clear to valac.
While working on this task you should join and remain in #CopyleftGames on Freenode to get help, feedback, and guidance from mentors and other developers. Code updates which may affect your work are also announced here as they happen.
When you've done, commit your work and post the resulting changeset url to this task.