当我做cabal install criterion
我收到有关包裹的以下错误vector-algorithms
Warning: The package list for 'hackage.haskell.org' is 16 days old.
Run 'cabal update' to get the latest list of available packages.
Resolving dependencies...
Downloading vector-algorithms-0.4...
cabal: Error: some packages failed to install:
vector-algorithms-0.4 failed while downloading the package. The exception was:
connect: does not exist (Connection refused)
当我cabal update
再次运行它时出现错误
Downloading the latest package list from hackage.haskell.org
cabal: openTCPConnection: host lookup failure for ""
怎么了?
我正在使用此 PPA中的 Ubuntu 11.10 和 GHC 7.0.4,并且我的网络连接在系统的其余部分中很好。