Estoy usando Linux (Centos 6.6). Cuando intento ejecutar el comando cabal install cabal-install obtengo los siguientes errores

cabal: cannot configure unix-2.7.0.1. It requires base >=4.5 && <4.8
For the dependency on base >=4.5 && <4.8 there are these packages:
base-4.5.0.0, base-4.5.1.0, base-4.6.0.0, base-4.6.0.1, base-4.7.0.0 and
base-4.7.0.1. However none of them are available.
base-4.5.0.0 was excluded because base-4.3.1.0 was selected instead
base-4.5.0.0 was excluded because of the top level dependency base -any
base-4.5.1.0 was excluded because base-4.3.1.0 was selected instead
base-4.5.1.0 was excluded because of the top level dependency base -any
base-4.6.0.0 was excluded because base-4.3.1.0 was selected instead
base-4.6.0.0 was excluded because of the top level dependency base -any
base-4.6.0.1 was excluded because base-4.3.1.0 was selected instead
base-4.6.0.1 was excluded because of the top level dependency base -any
base-4.7.0.0 was excluded because base-4.3.1.0 was selected instead
base-4.7.0.0 was excluded because of the top level dependency base -any
base-4.7.0.1 was excluded because base-4.3.1.0 was selected instead
base-4.7.0.1 was excluded because of the top level dependency base -any

Nota: caball-install versión 0.10.2 usando la versión 1.10.2.0 de la biblioteca Cabal
GHC versión 7.0.4
haskell-platform-2011.4.0.0-6.el6.x86_64

Cómo resolverlo.pls ayuda!