Question

尝试使用命令安装zlib软件包时使用命令：

cabal install --root-cmd=sudo --global zlib

安装失败并显示消息：

In-place registering zlib-0.5.4.1...
cabal: Error: some packages failed to install:
zlib-0.5.4.1 failed during the final install step. The exception was:
user error (Unable to find cabal executable at: /home/manu2/.cabal/bin/cabal)

显然，manu2不是我的电脑名。帮助

Coputer使用Chakra GNU / Linux 64位intel i7-230 CPU

Answer 1

因此，当您使用root-cmd进行安装时，它会调用following路径：

   reexec cmd = do
      -- look for our own executable file and re-exec ourselves using a helper
      -- program like sudo to elevate privileges:
      self <- getExecutablePath
      weExist <- doesFileExist self
      if weExist
        then inDir workingDir $
               rawSystemExit verbosity cmd
                 [self, "install", "--only"
                 ,"--verbose=" ++ showForCabal verbosity]
        else die $ "Unable to find cabal executable at: " ++ self

因此，可执行路径以某种方式解析为/home/manu2/.cabal/bin/cabal，但随后在该路径上调用doesFileExist失败。为什么会出现这种情况显然是系统依赖的，但只需尝试相关代码的片段就可以进一步调查......

cabal zlib安装失败

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