ghc speed log build script

Hi Joachim, Is the script used to do the builds for perf.haskell.org/ghc/ available somewhere? I couldn't find it poking around your GitHub repositories. I assume from the line "Try to match validate settings" that the build script creates a custom build.mk or similar. I'd like to know exactly what it does so that I can experiment with custom build settings without worrying about them being overridden by your build script. Regards, Reid Barton