我试图安装 haskell 包 ssh-0.2.12
sudo cabal install ssh-0.2.12
但它失败了
src/SSH.hs:58:114: Not in scope: type constructor or class `SHA1'
src/SSH.hs:59:115: Not in scope: type constructor or class `MD5'
Failed to install ssh-0.2.12
cabal: Error: some packages failed to install:
ssh-0.2.12 failed during the building phase. The exception was:
我在 Ubuntu 13.04 上。