$ ./ci/cloudbuild/build.sh -t cmake-oldest-deps-pr --docker
...
-------------------
|   Configuring   |
-------------------
-- Running vcpkg install
-- Running vcpkg install - failed
CMake Error at cmake-out/vcpkg/scripts/buildsystems/vcpkg.cmake:815 (message):
  vcpkg install failed.  See logs for more information:
  /workspace/cmake-out/build/vcpkg-manifest-install.log
Call Stack (most recent call first):
  /usr/share/cmake-3.16/Modules/CMakeDetermineSystem.cmake:93 (include)
  CMakeLists.txt:26 (project)


CMake Error: CMake was unable to find a build program corresponding to "Ninja".  CMAKE_MAKE_PROGRAM is not set.  You probably need to select a different build tool.
CMake Error: CMAKE_CXX_COMPILER not set, after EnableLanguage
CMake Error: CMAKE_C_COMPILER not set, after EnableLanguage
-- Configuring incomplete, errors occurred!
...