ghc 6.4 without libreadline4

Does anyone have a prebuilt version of ghc 6.4 that works with libreadline5? The generic Linux version on http://www.haskell.org/ghc/download_ghc_64.html requires libreadline4, but the system I am using does not have it installed. Nor am I the administrator, so I can't go installing libraries willy-nilly sadly. Or is really the best solution here to get my administrator to do so? Will building my own version and setting my LD_LIBRARY_PATH work reasonably well too? Thanks.