Hi Etienne sorry for the late reply. I do use caching in some Java deployments, however not in the CDK Pipelines module. If you use the CodePipeline and CodeBuild constructs directly it is easy to configure. Have a look at PipelineProject: https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_codebuild.PipelineProject.html