POSTIN

/bin/sh

update-alternatives --install /usr/bin/ctags ctags /usr/bin/exuberant-ctags 10 \
                    --slave /usr/share/man/man1/ctags.1.lzma ctags.1.lzma /usr/share/man/man1/exuberant-ctags.1.lzma

POSTUN

/bin/sh

[ $1 = 0 ] || exit 0
update-alternatives --remove ctags /usr/bin/exuberant-ctags