【发布时间】：2015-01-22 01:09:44
【问题描述】：
我正在使用 linux (centos 6.6)。当我尝试运行 cabal install cabal-install 命令时出现以下错误
cabal: cannot configure unix-2.7.0.1. It requires base >=4.5 && <4.8
For the dependency on base >=4.5 && <4.8 there are these packages:
base-4.5.0.0, base-4.5.1.0, base-4.6.0.0, base-4.6.0.1, base-4.7.0.0 and
base-4.7.0.1. However none of them are available.
base-4.5.0.0 was excluded because base-4.3.1.0 was selected instead
base-4.5.0.0 was excluded because of the top level dependency base -any
base-4.5.1.0 was excluded because base-4.3.1.0 was selected instead
base-4.5.1.0 was excluded because of the top level dependency base -any
base-4.6.0.0 was excluded because base-4.3.1.0 was selected instead
base-4.6.0.0 was excluded because of the top level dependency base -any
base-4.6.0.1 was excluded because base-4.3.1.0 was selected instead
base-4.6.0.1 was excluded because of the top level dependency base -any
base-4.7.0.0 was excluded because base-4.3.1.0 was selected instead
base-4.7.0.0 was excluded because of the top level dependency base -any
base-4.7.0.1 was excluded because base-4.3.1.0 was selected instead
base-4.7.0.1 was excluded because of the top level dependency base -any
注意：caball-install 版本 0.10.2
使用 Cabal 库的 1.10.2.0 版
GHC 版本 7.0.4
haskell-platform-2011.4.0.0-6.el6.x86_64
如何解决。请帮忙！
【问题讨论】：
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那些版本很古老。您可能想从头开始重新安装 cabal/ghc。
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你能给我一个下载最新版本的链接吗？如果我尝试下载这些，使用 yum install 命令只会得到旧版本。我应该更新存储库还是应该如何解决这些依赖问题？
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@Michael-当尝试从您提供的链接更新 cabal 时出现以下错误：
No instance for (NFData Version) arising from a use ofrnf' 可能的解决方法：在 @ 的第二个参数中为（NFData 版本）添加实例声明987654325@rnf version' 在表达式中：rnf nameseqrnf version 在rnf': rnf (PackageIdentifier name version) = rnf nameseq` rnf version 的等式中 cabal-install 引导期间出错：编译安装脚本失败。`
标签： haskell cabal cabal-install