cabal无法读取bytestring cabal文件，用ghc 7.4.1

Question

我刚刚在32位linux上从GHC 7.2.2升级到7.4.1。安装很顺利，但是cabal-install并不高兴：

$ cabal update
Downloading the latest package list from hackage.haskell.org
$ cabal install repa
Resolving dependencies...
cabal: Couldn't read cabal file "bytestring/0.9.2.1/bytestring.cabal"

这是我正在运行的阴谋版本

$ cabal --version
cabal-install version 0.10.2
using version 1.10.1.0 of the Cabal library

谢谢！

Answer 1

这里有一个解决方法：http://www.haskell.org/pipermail/haskell-cafe/2012-February/099077.html

Answer 2

运行cabal update后运行此代码：

tar -f ~/.cabal/packages/hackage.haskell.org/00-index.tar --delete bytestring/0.9.2.0
tar -f ~/.cabal/packages/hackage.haskell.org/00-index.tar --delete bytestring/0.9.2.1