That only encouraged use of 1.1.0.0 which I think is the real source of trouble
(http://hackage.haskell.org/trac/ghc/ticket/4513)
rolling back:
Fri Nov 26 13:20:32 PST 2010 Simon Michael <simon@joyful.com>
* chart: avoid haskell98-1.0.1.1 which has buggy dependencies
M ./hledger-chart/hledger-chart.cabal +1