【发布时间】：2012-10-09 12:48:35
【问题描述】：
我通常发现 cabal 安装超过一半的大包失败，这对新用户来说是一个致命的缺陷！
这次我尝试安装yesod，有什么提示吗？
> cabal install yesod
...
Loading package time-1.2.0.5 ...
GHCi runtime linker: fatal error: I found a duplicate definition for symbol
_get_current_timezone_seconds
whilst processing object file
C:\Users\guthrie\AppData\Roaming\cabal\time-1.2.0.5\ghc-7.4.1\HStime-1.2.0.5.o
This could be caused by:
* Loading two different object files which export the same symbol
* Specifying the same object file twice on the GHCi command line
* An incorrect `package.conf' entry, causing some object to be
loaded twice.
GHCi cannot safely continue in this situation. Exiting now. Sorry.
cabal: Error: some packages failed to install:
authenticate-1.3.1.1 depends on http-conduit-1.6.1.1 which failed to install.
http-conduit-1.6.1.1 failed during the building phase. The exception was:
ExitFailure 1
yesod-1.1.1.2 depends on yesod-core-1.1.2.1 which failed to install.
yesod-auth-1.1.1.1 depends on yesod-core-1.1.2.1 which failed to install.
yesod-core-1.1.2.1 failed during the building phase. The exception was:
ExitFailure 1
yesod-form-1.1.3 depends on yesod-core-1.1.2.1 which failed to install.
yesod-json-1.1.0 depends on yesod-core-1.1.2.1 which failed to install.
yesod-persistent-1.1.0 depends on yesod-core-1.1.2.1 which failed to install.
【问题讨论】：
-
这可能是您的
cabal版本（或者可能是cabal的Windows 版本）的问题。我刚刚从 Debian Wheezy 的cabal 1.14.0成功运行了安装过程。 -
C:\Users\me>cabal --version cabal-使用 Cabal 库的 1.14.0 版安装 0.14.0 版