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## BuildKit
BuildKit 是下一代的镜像构建组件，在 https://github.com/moby/buildkit 开源。
下面介绍如何在 Docker CE 18.09+ 版本中使用 BuildKit 构建 Docker 镜像。
```bash
$ export DOCKER_BUILDKIT=1
# Windows
$ set $env:DOCKER_BUILDKIT=1
```