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我正在运行 ubuntu 13.10，安装 fay 时遇到问题。我使用 sudo apt-get install haskell-platform . 我尝试cabal install fay并收到以下消息：

$ cabal install fay
Resolving dependencies...
Configuring type-eq-0.4.2...
cabal: The program cpphs is required but it could not be found.
Failed to install type-eq-0.4.2
cabal: Error: some packages failed to install:
fay-0.20.0.0 depends on type-eq-0.4.2 which failed to install.
haskell-names-0.3.3.2 depends on type-eq-0.4.2 which failed to install.
type-eq-0.4.2 failed during the configure step. The exception was:
ExitFailure 1

我试过 install cpphs，但我已经有了。

$ cabal install cpphs
Resolving dependencies...
All the requested packages are already installed:
cpphs-1.18.4
Use --reinstall if you want to reinstall anyway.

最后，我尝试type-eq自行安装，预计它依赖于cpphs. 

$ cabal install type-eq
Resolving dependencies...
Configuring type-eq-0.4.2...
cabal: The program cpphs is required but it could not be found.
Failed to install type-eq-0.4.2
cabal: Error: some packages failed to install:
type-eq-0.4.2 failed during the configure step. The exception was:
ExitFailure 1

我该怎么办？提前感谢您的帮助。

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1 回答 1

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根据原帖的评论：

  1. cabal抱怨找不到已安装cpphs

  2. which cpphs说找不到命令

  3. 这意味着cpphs不在 shell 的搜索路径中

  4. 添加~/.cabal/bin到PATH可用于解决此问题

于 2014-05-13T04:17:41.990 回答