Hey all,<div>I just did a checkout of the tip of ghc 8.0 branch and it looks like the <a href="http://build.mk">build.mk</a> files have seen a bit of reorganization! Now for the perf aka release  build the various doc variavles seem to be implicitly set somewhere else and I got a bit lost when trying to dig them up.  </div><div><br></div><div>On the flip side : is the shake build system alternative mature enough for it to be reasonable to attempt using it on my Mac ?</div><div><br></div><div>Many thanks <span></span></div>