RUN --mount=type=bind doesn't work

[shollander]

Expected Behavior

Use RUN --mount=type=bind to install dependencies in efficient manner. e.g. Dockerfile:

FROM python:3.12-slim
RUN --mount=type=bind,source=myapp,target=/tmp/myapp pip install /tmp/myapp

Current Behavior

Fails with the following error:

Could not build image: the --mount option requires BuildKit. Refer to https://doc.docker.com/go/buildkit ro learn how to build images with BuildKit enabled

Context

This Dockerfile works fine with command line docker build .

[bmuschko]

The Docker remote API does not support buildkit as of now.

[shollander]

I'm not sure what you mean by that. According to the Docker documentation, it appears that the remove driver does support BuildKit.

[bmuschko]

We are not using the Docker executable with this plugin. We are using the RESTful API.