Help! Can't build HEAD

Aargh! I can't build HEAD! I get this: ./hadrian/build Up to date ]0;Starting... ]0;Finished in 0.04s Error, file does not exist and no rule available: utils/hpc/hpc-bin.cabal Build failed. This is after hadrian/build clean ./boot ./configure I'm very stalled. All my trees are borked. Can anyone help? Simon