Package: audacity Version: 2.4.2~dfsg0-3 Building audacity from unstable on buster leads to: CMake Error at CMakeLists.txt:6 (cmake_minimum_required): CMake 3.15 or higher is required. You are running version 3.13.4 i.e. you need a versioned Build-Depends on cmake. -- Martin Michlmayr https://www.cyrius.com/