This is on the docker registry as ghc-haskell-dev.
To use, mount your GHC source code into /home/ghc
sudo docker run --rm -i -t -v `pwd`:/home/ghc gregweber/ghc-haskell-dev /bin/bash
You are now ready to compile GHC! There is one final setup step to run once you have the image up:
arc install-certificate
This places a .arcrc file (which is git ignored) in your repo arc is a tool to interface with phabricator, the main ghc development tool. When you have a patch ready, run:
arc diff
Look here on how to kick off your first build: https://ghc.haskell.org/trac/ghc/wiki/Newcomers