message: [CI] Explicitly select Windows SDK
  Our windows nodes on CI come with a number of Windows SDK and CMake has trouble selecting the right one.
diff: @@ -118,7 +118,7 @@ def doWindowsBuild() {
  getSourceArchive()
  bat """
  - "${tool 'cmake'}" .
  + "${tool 'cmake'}" . -DCMAKE_SYSTEM_VERSION="8.1"
  "${tool 'cmake'}" --build . --config Release
  tests\\Release\\tests.exe
  """
  