We're testing backend monorepo develop migration to AWS CodeBuild. You can see the build report in #develop-build. We have around 100 builds/day coming from this pipeline. By migrating these builds to CodeBuild, we'll get some free slaves that can be used by other pipelines.
Please make sure your laptop's jdk version starts with 1.8.0_ (see java -version). This should be the case but kindly verify. Building with other versions (1.7*, 1.9+) might be possible but is not recommended.
Lastly, the installed arcanist should be a git repository not the prepackaged ubuntu package (see which arc). Using the git one will ensure API compatibility with our phabricator (e.g. when making code review requests).