This line does not seem like something that could ever work: https://github.com/flutter/engine/blob/main/examples/vulkan_glfw/CMakeLists.txt#L43 (ends up as is in the ninja file, and so is not a valid path) and main.cc is missing include of chrono, despite using std::chrono.