Switch to WIP CI toolkit branch

Author: mokagio

.buildkite/shared-pipeline-vars

@@ -5,9 +5,10 @@
 
 # The ~> modifier is not currently used, but we check for it just in case
 XCODE_VERSION=$(sed -E -n 's/^(~> )?(.*)/xcode-\2/p' .xcode-version)
-CI_TOOLKIT_VERSION='3.10.0'
+CI_TOOLKIT_VERSION='mokagio/more-windows-utils'
 NVM_PLUGIN_VERSION='0.3.0'
 
 export IMAGE_ID="$XCODE_VERSION"
 export CI_TOOLKIT_PLUGIN="automattic/a8c-ci-toolkit#$CI_TOOLKIT_VERSION"
 export NVM_PLUGIN="automattic/nvm#$NVM_PLUGIN_VERSION"
+export BUILDKITE_PLUGINS_ALWAYS_CLONE_FRESH="true"