Cabal无法安装包装，因为它需要cabal

Question

当我尝试安装目录包时，出现以下错误：

$ cabal install directory
Resolving dependencies...
Failed to install directory-1.2.2.1
cabal: Error: some packages failed to install:
directory-1.2.2.1 failed during the configure step. The exception was:
user error (The package requires Cabal library version -any && >=1.10 but no
suitable version is installed.)

我的阴谋版本是：

cabal --version
cabal-install version 1.16.0.2
using version 1.16.0 of the Cabal library 

我尝试执行cabal安装Cabal，但它依赖于目录，所以它也失败了。有什么问题以及如何解决它？

Answer 1

Cabal（库）和cabal-install（可执行文件）不是一回事。您需要升级cabal-install：

cabal install cabal cabal-install

您的版本（1.16）很古老。