diff --git a/hermetic_build/DEVELOPMENT.md b/hermetic_build/DEVELOPMENT.md
index b6e78389dc..e54c57e9ec 100644
--- a/hermetic_build/DEVELOPMENT.md
+++ b/hermetic_build/DEVELOPMENT.md
@@ -160,13 +160,18 @@ python hermetic_build/library_generation/cli/entry_point.py generate \
 1. Run the following command to build the image from source
 
    ```shell
-   docker build \
+   DOCKER_BUILDKIT=1 docker build \
      -f .cloudbuild/library_generation/library_generation.Dockerfile \
      -t local:image-tag \
      .
    ```
+   Please note that the build only works when using the new
+   [Docker BuildKit](https://docs.docker.com/build/buildkit/) (enabled through the `DOCKER_BUILDKIT` variable).
+   This is meant for local development only (in CloudTops) - GH Actions' Ubuntu-22.04 \
+   [comes with the latest Docker version](https://github.com/actions/runner-images/blob/e74605cd6d5407469cf224802f25057bafc23d70/images/ubuntu/Ubuntu2204-Readme.md?plain=1#L81-L83)
+   and is able to handle the build properly using the (updated) legacy builder.
    
-2. Set the version of gapic-generator-java
+3. Set the version of gapic-generator-java
 
    ```shell
    LOCAL_GENERATOR_VERSION=$(mvn \
@@ -177,7 +182,7 @@ python hermetic_build/library_generation/cli/entry_point.py generate \
      -q)
    ```
 
-3. Run the image
+4. Run the image
 
    ```shell
       # Assume you want to generate the library in the current working directory