Keep experimenting with cabal folder.
Keep experimenting with cabal folder.

See #110. [skip ci]

sdiehl/ghc,bgamari/shaking-up-ghc,izgzhen/hadrian,snowleopard/shaking-up-ghc,sdiehl/ghc,sdiehl/ghc,sdiehl/ghc,snowleopard/hadrian,sdiehl/ghc,sdiehl/ghc,quchen/shaking-up-ghc,sdiehl/ghc