[Haskell-cafe] building a patched ghc

How do I get the latest 6.12 source and cherry-pick selected patches from the trunk, e.g. Simon's GC fixes? The wiki says that you get the head with darcs get --lazy http://darcs.haskell.org/ghc and the 6.12 with darcs get --lazy http://darcs.haskell.org/ghc-6.12/ghc Since the trunk is big enough, I wonder if 6.12 a subset of it and can be obtained from it? The tags are not informative. If I get the branch, how will I be able to get the patches from the head, once they're separate repos? -- Alexy