bind opt /opt
for d in /opt/*/man/* /opt/*/*/man/* {
    or {ftest -d $d} {raise continue}
    n := `{basename $d}
    bind -b $d /man/$n
}
for d in /opt/*/dis/* /opt/*/*/dis/* {
    or {ftest -d $d} {raise continue}
    n := `{basename $d}
    and {~ $n lib} {raise continue}
    and {~ $n cmd} {n=''}
    bind -b $d /dis/$n
}