id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	os	architecture	failure	difficulty	testcase	blockedby	blocking	related
3168	"Unhelpful error message about ""hidden"" packages"	simonpj		"Anatoly Yakonenko [http://www.haskell.org/pipermail/haskell-cafe/2009-April/059677.html reported]: I am trying to build `ParseP` on the latest ghc, and I am getting this error:
{{{

 Text/ParserCombinators/ParseP/Interface.hs:26:17:
    Could not find module `Data.ByteString.Char8':
      it is a member of package bytestring-0.9.1.4, which is hidden
}}}
Ross Mellgren responded (correctly): I assume you're using cabal, which hides all packages by default. Add ""bytestring"" or ""bytestring >= 0.9.*"" or something along those lines to Build-Depends in your .cabal file.

Suggestion: improve GHC's error message.
"	bug	closed	normal	6.12.1	Compiler	6.10.2	fixed			Unknown/Multiple	Unknown/Multiple		Easy (less than 1 hour)