Last 10 lines of the build log ( /Users/dmj/.cabal/logs/hdevtools-0.1.0.5.log ):
    Not in scope: data constructor ‘GHC.MatchGroup’
    Perhaps you meant ‘GHC.DocGroup’ (imported from GHC)

src/Info.hs:164:5:
    Not in scope: ‘Pretty.showDocWith’
    Perhaps you meant ‘Pretty.showDoc’ (imported from Pretty)

src/Info.hs:229:12:
    Not in scope:
      type constructor or class ‘PprTyThing.PrintExplicitForalls’
cabal: Error: some packages failed to install:
hdevtools-0.1.0.5 failed during the building phase. The exception was:
ExitFailure 1