# Flutter SDK dependency versions The files in this directory specifies pinned versions of various dependencies of the flutter SDK. The `bin/internal/engine.version` file controls where to find compiled artifacts of the engine. These artifacts are compiled in the Merge Queue for every commit in the flutter repository. The `bin/internal/flutter_packages.version` file specifies the version of the `flutter/packages` repository to be used for testing. The `flutter/packages` repository isn't an upstream dependency of `flutter/flutter`; it is only used as part of the test suite for verification, and the pinned version here makes sure that tests are deterministic at each `flutter/flutter` commit.