>> Step 1 - configuring happy-1.16


Setup.lhs:19:58:
    Couldn't match expected type `()' against inferred type `ExitCode'
      Expected type: Args
		     -> BuildFlags
		     -> PackageDescription
		     -> LocalBuildInfo
		     -> IO ()
      Inferred type: Args
		     -> BuildFlags
		     -> PackageDescription
		     -> LocalBuildInfo
		     -> IO ExitCode
    In the `postBuild' field of a record
    In the first argument of `defaultMainWithHooks', namely
	`defaultUserHooks
	     {postBuild = myPostBuild,
	      postClean = myPostClean,
	      postCopy = myPostCopy,
	      postInst = myPostInstall}'

>> Terminated due to an error.