Wie aktualisiere ich Pandoc auf Centos Linux?

Ich habe die Datei cabal-install-1.20.0.3.tar.gz heruntergeladen und beim Versuch, sie auszuführen, extrahiert, erhalte ich folgende Fehler. Mein Ziel ist es, Pandoc zu aktualisieren. Jetzt habe ich pandoc 1.9, aber ich brauche Version 1.12. Um pandoc zu aktualisieren, versuche ich, die Kabalenbibliothek zu aktualisieren. Aber kein Glück

root@gains [/home/quotequadsco/pkp/cabal-install-1.20.0.3]# sh bootstrap.sh Using gcc for C compiler. If this is not what you want, set CC. Using /usr/libexec/gcc/x86_64-redhat-linux/4.4.7/collect2 instead. Checking installed packages for ghc-7.0.4... deepseq is already installed and the version is ok. time is already installed and the version is ok. Cabal-1.20.0.0 will be downloaded and installed. transformers is already installed and the version is ok. mtl is already installed and the version is ok. text is already installed and the version is ok. parsec is already installed and the version is ok. network is already installed and the version is ok. HTTP-4000.2.12 will be downloaded and installed. zlib is already installed and the version is ok. random is already installed and the version is ok. stm is already installed and the version is ok.  Downloading Cabal-1.20.0.0... % Total % Received % Xferd Average Speed Time Time Time Current Dload Upload Total Spent Left Speed 100 318k 0 318k 0 0 688k 0 --:--:-- --:--:-- --:--:-- 1439k [ 1 of 76] Compiling Distribution.PackageDescription.Utils ( Distribution/PackageDescription/Utils.hs, Distribution/PackageDescription/Utils.o ) [ 2 of 76] Compiling Distribution.Simple.CCompiler ( Distribution/Simple/CCompiler.hs, Distribution/Simple/CCompiler.o ) [ 3 of 76] Compiling Distribution.Compat.CreatePipe ( Distribution/Compat/CreatePipe.hs, Distribution/Compat/CreatePipe.o ) [ 4 of 76] Compiling Distribution.Compat.Environment ( Distribution/Compat/Environment.hs, Distribution/Compat/Environment.o ) [ 5 of 76] Compiling Distribution.Compat.Exception ( Distribution/Compat/Exception.hs, Distribution/Compat/Exception.o ) [ 6 of 76] Compiling Distribution.Compat.TempFile ( Distribution/Compat/TempFile.hs, Distribution/Compat/TempFile.o ) [ 7 of 76] Compiling Distribution.Compat.CopyFile ( Distribution/Compat/CopyFile.hs, Distribution/Compat/CopyFile.o ) [ 8 of 76] Compiling Distribution.GetOpt ( Distribution/GetOpt.hs, Distribution/GetOpt.o ) [ 9 of 76] Compiling Distribution.Compat.ReadP ( Distribution/Compat/ReadP.hs, Distribution/Compat/ReadP.o ) [10 of 76] Compiling Distribution.Text ( Distribution/Text.hs, Distribution/Text.o ) [11 of 76] Compiling Distribution.Version ( Distribution/Version.hs, Distribution/Version.o ) [12 of 76] Compiling Language.Haskell.Extension ( Language/Haskell/Extension.hs, Language/Haskell/Extension.o ) [13 of 76] Compiling Distribution.TestSuite ( Distribution/TestSuite.hs, Distribution/TestSuite.o ) [14 of 76] Compiling Distribution.System ( Distribution/System.hs, Distribution/System.o ) [15 of 76] Compiling Distribution.Simple.PreProcess.Unlit ( Distribution/Simple/PreProcess/Unlit.hs, Distribution/Simple/PreProcess/Unlit.o ) [16 of 76] Compiling Distribution.ReadE ( Distribution/ReadE.hs, Distribution/ReadE.o ) [17 of 76] Compiling Distribution.Verbosity ( Distribution/Verbosity.hs, Distribution/Verbosity.o ) [18 of 76] Compiling Distribution.Package ( Distribution/Package.hs, Distribution/Package.o )  Distribution/Package.hs:91:59: No instance for (NFData Version) arising from a use of `rnf' Possible fix: add an instance declaration for (NFData Version) In the second argument of `seq', namely `rnf version' In the expression: rnf name `seq` rnf version In an equation for `rnf': rnf (PackageIdentifier name version) = rnf name `seq` rnf version  Error during cabal-install bootstrap: Compiling the Setup script failed. 

Eigentlich muss ich Kabal aktualisieren, aber jeder Versuch schlägt fehl.

Ich habe Cabal Install Cabal-Install ausprobiert und folgende Fehler erhalten

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. 

Zusätzliche Anmerkung: Centos 6.6
caball-install Version 0.10.2 unter Verwendung von Version 1.10.2.0 der Cabal-Bibliothek
GHC Version 7.0.4
haskell-platform-2011.4.0.0-6.el6.x86_64
Wie kann ich das beheben?