Cabal安装包失败，因为需要cabal

Question

当我尝试安装目录包时，我得到以下错误：

$ 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 

我试图执行cabal install Cabal，但它依赖于目录，所以它也失败了。哪里出了问题，我该如何修复它？

Answer 1

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

cabal install cabal cabal-install

您的版本(1.16)是旧版本。