我正在尝试在 FreeBSD 8.1 上安装GHC和安装。Cabal我已经安装了 GHC 7.0.1(因为它是当前的稳定版本),现在尝试安装Cabal(安装cabal-install),但它失败并显示此错误消息。
%./Setup configure
Configuring Cabal-1.8.0.4...
Setup: At least the following dependencies are missing:
base >=4 && <3 && >=1 && <5, filepath >=1 && <1.2
%
绝对我的库版本太高了。
%ghc-pkg list
/usr/local/lib/ghc-7.0.1/package.conf.d
Cabal-1.10.0.0
array-0.3.0.2
base-4.3.0.0
bin-package-db-0.0.0.0
bytestring-0.9.1.8
containers-0.4.0.0
directory-1.1.0.0
extensible-exceptions-0.1.1.2
ffi-1.0
filepath-1.2.0.0
ghc-7.0.1
ghc-binary-0.5.0.2
ghc-prim-0.2.0.0
haskell2010-1.0.0.0
haskell98-1.1.0.0
hpc-0.5.0.6
integer-gmp-0.2.0.2
old-locale-1.0.0.2
old-time-1.0.0.6
pretty-1.0.1.2
process-1.0.1.4
random-1.0.0.3
rts-1.0
template-haskell-2.5.0.0
time-1.2.0.3
unix-2.4.1.0
/home/eonil/.ghc/x86_64-freebsd-7.0.1/package.conf.d
network-2.2.1.5
parsec-2.1.0.1
%
我应该降级到 GHC 6.x 吗?或者我可以安装较低版本的软件包吗?(或并排安装)