POSTIN
/bin/sh
for app in icewm icesh icewmbg icewmhint icewm-session icehelp; do update-alternatives --install /usr/bin/${app} ${app} /usr/bin/${app} 20 done
POSTUN
/bin/sh
if [ "$1" = 0 ]; then for app in icewm icesh icewmbg icewmhint icewm-session icehelp; do update-alternatives --remove ${app} /usr/bin/${app} done fi