Hi,
based on https://community.igniterealtime.org/thread/48931 I created a docker image for building Spark with installers for Debian and Windows, see https://registry.hub.docker.com/u/joemat/docker-buildenv-for-spark/
We’re using this image to build our customized version of Spark.
I think this could make things easier for new developers that don’t have already a build environment. Feel free to clone and modify it.