cabal在linux上安装cabal-install错误 [英] cabal install cabal-install errors out on linux

问题描述

 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：不能配置unix-2.7.0.1。它需要> = 4.5&& < 4.8 
对于> = 4.5&& < 4.8有这些包：
 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和
 base-4.7。 0.1。但是，它们都不可用。 
 base-4.5.0.0被排除，因为选择了base-4.3.1.0，而不是因为顶级依赖关系基础排除了
 base-4.5.0.0 -any 
 base-4.5.1.0是因为选择了base-4.3.1.0，所以排除了
 base-4.5.1.0，因为顶级依赖关系基础排除了 - 任何排除了
 base-4.6.0.0因为选择了base-4.3.1.0 
 base-4.6.0.0被排除在顶级依赖关系基础之上-any 
 base-4.6.0.1被排除，因为选择了base-4.3.1.0，而不是
 base-4.6.0.1排除，因为顶级依赖关系基础-any 
 base-4.7.0.0被排除，因为选择了base-4.3.1.0，而不是由于顶级依赖关系基础而被排除了
 base-4.7.0.0 -any 
 base-4.7.0.1被排除，因为选择了base-4.3.1.0，而是因为顶级依赖关系基础而被排除了
 base-4.7.0.1 -any 
  

注意：caball-install版本0.10.2
使用版本1.10.2.0 Cabal图书馆

GHC版本7.0.4

haskell-platform-2011.4.0.0-6.el6.x86_64

如何解决它.pls帮助！

解决方案

这个问题是因为旧版本的ghc-7.0.4.I下载ghc 7.8.3来自此处的源码tarball并安装它。

然后ghc 7.8.3有旧版cabal，所以必须使用
ghc unregister Cabal 来从ghc 7.8.3注销它。

然后从cabal-install-1.20文件夹运行bootstrap.sh并成功安装cabal-install 1.20。

Am using linux (centos 6.6).When I try to run cabal install cabal-install command am getting following errors

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

Note: caball-install version 0.10.2 using version 1.10.2.0 of the Cabal library
GHC version 7.0.4
haskell-platform-2011.4.0.0-6.el6.x86_64

How to resolve it.pls help!

解决方案

This issue is because of an old version of ghc-7.0.4.I downloaded ghc 7.8.3 source tarball from here and installed it.

Then ghc 7.8.3 had old version of cabal so, have to unregister it from ghc 7.8.3 using ghc unregister Cabal .

Then run bootstrap.sh from cabal-install-1.20 folder and got cabal-install 1.20 successfully.

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