PREUN

/bin/sh

if [ "$1" = 0 ]; then
  update-alternatives --remove runhaskell /usr/bin/runhugs
  update-alternatives --remove hsc2hs     /usr/bin/hsc2hs-hugs
  update-alternatives --remove cpphs      /usr/bin/cpphs-hugs
fi

POSTIN

/bin/sh

update-alternatives --install /usr/bin/runhaskell runhaskell \
  /usr/bin/runhugs 100
update-alternatives --install /usr/bin/hsc2hs hsc2hs \
  /usr/bin/hsc2hs-hugs 100
update-alternatives --install /usr/bin/cpphs cpphs \
  /usr/bin/cpphs-hugs 100