Пытаюсь установить в систему пакет dbf. В зависимостях идёт rwlock.
При его сборке возникает конфликт пакетов:

F:\Lang\sf.net\darcs\rwlock>runghc Setup.lhs build
Preprocessing library rwlock-0.0.0.1...
Building rwlock-0.0.0.1...

src\Control\Concurrent\RWLock.hs:30:7:
    Could not find module `Data.Generics':
      it is a member of the hidden package `base-3.0.3.1'
      it is a member of the hidden package `syb'
      Use -v to see a list of the files searched for.

Есть ли какие-нибудь простые средства для разрешения таких конфликтов?
Или придётся править пакеты (rwlock, dbf)?
Или постить баг в ghc?

Моя среда:
OS Windows Vista Home Basic Ru + sp2

F:\Lang\sf.net\darcs\rwlock>ghc -v
Glasgow Haskell Compiler, Version 6.10.4, for Haskell 98, stage 2 booted by GHC
version 6.10.1
Using package config file: C:\Lang\Haskell\ghc\package.conf
hiding package base-3.0.3.1 to avoid conflict with later version base-4.1.0.0
hiding package regex-base-0.72.0.2 to avoid conflict with later version regex-ba
se-0.93.1
wired-in package ghc-prim mapped to ghc-prim-0.1.0.0
wired-in package integer mapped to integer-0.1.0.1
wired-in package base mapped to base-4.1.0.0
wired-in package rts mapped to rts-1.0
wired-in package haskell98 mapped to haskell98-1.0.1.0
wired-in package syb mapped to syb-0.1.0.1
wired-in package template-haskell mapped to template-haskell-2.3.0.1
wired-in package dph-seq mapped to dph-seq-0.3
wired-in package dph-par mapped to dph-par-0.3
Hsc static flags: -static
*** Deleting temp files:
Deleting:
*** Deleting temp dirs:
Deleting:
ghc.EXE: no input files
Usage: For basic information, try the `--help' option.