libghc6-happs-dev confilcts with current haskel packages: $ sudo apt-cache show libghc6-happs-dev | egrep '(Depends|Conflicts)' Depends: ghc6 (>= 6.6.1), ghc6 (<< 6.6.1+), libghc6-base-dev, libghc6-base-prof, libghc6-network-dev (>= 2.0.1), libghc6-haxml-dev (>= 1.13.2), libghc6-mtl-dev (>= 1.0.1), libghc6-binary-dev (>= 0.3), libghc6-hslogger-dev (>= 1.0.2) Conflicts: libghc6-network-dev (>= 2.0.1+), libghc6-haxml-dev (>= 1.13.2+), libghc6-mtl-dev (>= 1.0.1+), libghc6-binary-dev (>= 0.3+), libghc6-hslogger-dev (>= 1.0.3+)
-- Всеволод

