haskell - Cabal 无法安装软件包，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 cabal 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 install Cabal 但它依赖于目录，所以它也失败了。出了什么问题以及如何修复它？

Answer 1

Cabal(库)和 cabal-install(可执行文件)不是同一件事。您需要升级您的 cabal-install:

cabal install cabal cabal-install

您的版本(1.16)是古老的。