function find_local_pkgset
{
    local TOPFILE=.gvm_local
    if [ -d $TOPFILE ] ; then
        PWD= /bin/pwd
    else
        local HERE=$PWD
        T=
        while [ \( ! \( -d $TOPFILE \) \) -a \( $PWD != "/" \) ]; do
            \cd ..
            T=`PWD= /bin/pwd`
        done
        \cd $HERE
        if [ -d "$T/$TOPFILE" ]; then
            echo $T
        fi
    fi
}