$ docker build -t linux-es8336:latest .
$ mkdir ccache
$ docker run -v $PWD/ccache:/root/.cache/ccache --name linux-es8336-builder linux-es8336:latest
(wait for build finishes... requires ~20GB of disk space)
$ docker commit linux-es8336-builder linux-es8336:built
$ mkdir deb
$ docker run --rm -ti -v $PWD/deb:/deb linux-es8336:built bash
container$ cd /src/linux-es8336
container$ cp *.* /deb
container$ exit
now you have *.deb
files in deb
subdirectory