bug report: Cabal hides library

[Bulat Ziganshin]

Hello libr,

i think it's appropriate place to complain about Cabal?

situation: ghc 6.4.2 (2006.06.09) with built-in Cabal. i install
package with the following dependencies:

Build-Depends:      base, ArrayRef==0.1, fps>=0.7, template-haskell

there are ArrayRef 0.1 (hidden) and ArrayRef 0.1.1 (exposed) installed

Cabal correctly selects ArrayRef 0.1 when building the lib. but on
installation it makes the following trick:

Registering Streams-0.2.2...
Reading package info from ".installed-pkg-config" ... done.
Warning: hiding the following packages to avoid conflict:
  ArrayRef-0.1.1 Streams-0.1.6

hiding old version of Stream library is correct, but why the hell it hides
old ArrayRef library??? as the final result, both old and new ArrayRef
libraries are hidden:

>ghc-pkg list
C:/Base/Compiler/ghc-6.4\package.conf:
    (ArrayRef-0.1), (ArrayRef-0.1.1), Cabal-1.1.4, GLUT-2.0, HGL-3.1,
    HUnit-1.1, OpenGL-2.0, QuickCheck-1.0, (Streams-0.1.6),
    Streams-0.2.2, Win32-1.0, base-1.0, (concurrent-1.0), (data-1.0),
    fgl-5.2, fps-0.7, haskell-src-1.0, haskell98-1.0, (hssource-1.0),
    (lang-1.0), mtl-1.0, (net-1.0), network-1.0, objectio-1.0,
    parsec-1.0, readline-1.0, rts-1.0, stm-1.0, template-haskell-1.0,
    (text-1.0), (util-1.0), (win32-1.0)
  

-- 
Best regards,
 Bulat                          mailto:Bulat.Ziganshin at gmail.com